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/* png.c
Copyright (C) 2004-2011 Mark Tyler and Dmitry Groshev
This file is part of mtPaint.
mtPaint is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
mtPaint is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with mtPaint in the file COPYING.
*/
/* Rewritten for version 3.10 by Dmitry Groshev */
#include <stdio.h>
#include <errno.h>
#define PNG_READ_PACK_SUPPORTED
#include <png.h>
#include <zlib.h>
#ifdef U_GIF
#include <gif_lib.h>
#endif
#ifdef U_JPEG
#define NEED_CMYK
#include <jpeglib.h>
/* !!! Since libjpeg 7, this conflicts with <windows.h>; with libjpeg 8a,
* conflict can be avoided if windows.h is included BEFORE this - WJ */
#endif
#ifdef U_JP2
#define HANDLE_JP2
#include <openjpeg.h>
#endif
#ifdef U_JASPER
#define HANDLE_JP2
#include <jasper/jasper.h>
#endif
#ifdef U_TIFF
#define NEED_CMYK
#include <tiffio.h>
#endif
#if U_LCMS == 2
#include <lcms2.h>
/* For version 1.x compatibility */
#define icSigCmykData cmsSigCmykData
#define icSigRgbData cmsSigRgbData
#define icHeader cmsICCHeader
#elif defined U_LCMS
#include <lcms.h>
#endif
#include "global.h"
#include "mygtk.h"
#include "memory.h"
#include "png.h"
#include "mainwindow.h"
#include "canvas.h"
#include "toolbar.h"
#include "layer.h"
/* All-in-one transport container for animation save/load */
typedef struct {
frameset fset;
ls_settings settings;
int mode;
/* Explode frames mode */
int desttype;
int error, miss, cnt;
char *destdir;
} ani_settings;
int silence_limit, jpeg_quality, png_compression;
int tga_RLE, tga_565, tga_defdir, jp2_rate;
int apply_icc;
fformat file_formats[NUM_FTYPES] = {
{ "", "", "", 0},
{ "PNG", "png", "", FF_256 | FF_RGB | FF_ALPHA | FF_MULTI
| FF_TRANS | FF_COMPZ | FF_MEM },
#ifdef U_JPEG
{ "JPEG", "jpg", "jpeg", FF_RGB | FF_COMPJ },
#else
{ "", "", "", 0},
#endif
#ifdef HANDLE_JP2
{ "JPEG2000", "jp2", "", FF_RGB | FF_ALPHA | FF_COMPJ2 },
{ "J2K", "j2k", "jpc", FF_RGB | FF_ALPHA | FF_COMPJ2 },
#else
{ "", "", "", 0},
{ "", "", "", 0},
#endif
#ifdef U_TIFF
/* !!! Ideal state */
// { "TIFF", "tif", "tiff", FF_256 | FF_RGB | FF_ALPHA | FF_MULTI | FF_LAYER
// /* | FF_TRANS */ },
/* !!! Current state */
{ "TIFF", "tif", "tiff", FF_256 | FF_RGB | FF_ALPHA | FF_LAYER },
#else
{ "", "", "", 0},
#endif
#ifdef U_GIF
{ "GIF", "gif", "", FF_256 | FF_ANIM | FF_TRANS },
#else
{ "", "", "", 0},
#endif
{ "BMP", "bmp", "", FF_256 | FF_RGB | FF_ALPHAR | FF_MEM },
{ "XPM", "xpm", "", FF_256 | FF_RGB | FF_TRANS | FF_SPOT },
{ "XBM", "xbm", "", FF_BW | FF_SPOT },
{ "LSS16", "lss", "", FF_16 },
/* !!! Ideal state */
// { "TGA", "tga", "", FF_256 | FF_RGB | FF_ALPHA | FF_MULTI
// | FF_TRANS | FF_COMPR },
/* !!! Current state */
{ "TGA", "tga", "", FF_256 | FF_RGB | FF_ALPHAR | FF_TRANS | FF_COMPR },
{ "PCX", "pcx", "", FF_256 | FF_RGB },
{ "PBM", "pbm", "", FF_BW | FF_LAYER },
{ "PGM", "pgm", "", FF_256 | FF_LAYER | FF_NOSAVE },
{ "PPM", "ppm", "pnm", FF_RGB | FF_LAYER },
{ "PAM", "pam", "", FF_BW | FF_RGB | FF_ALPHA | FF_LAYER },
{ "GPL", "gpl", "", FF_PALETTE },
{ "TXT", "txt", "", FF_PALETTE },
/* !!! Not supported yet */
// { "PAL", "pal", "", FF_PALETTE },
/* !!! Placeholder */
{ "", "", "", 0},
{ "LAYERS", "txt", "", FF_LAYER },
/* !!! No 2nd layers format yet */
{ "", "", "", 0},
/* An X pixmap - not a file at all */
{ "PIXMAP", "", "", FF_RGB | FF_NOSAVE },
/* SVG image - import only */
{ "SVG", "svg", "", FF_RGB | FF_ALPHA | FF_SCALE | FF_NOSAVE },
};
int file_type_by_ext(char *name, guint32 mask)
{
char *ext;
int i, l = LONGEST_EXT;
ext = strrchr(name, '.');
if (!ext || !ext[0]) return (FT_NONE);
/* Special case for exploded frames (*.gif.000 etc.) */
if (!ext[strspn(ext, ".0123456789")] && memchr(name, '.', ext - name))
{
char *tmp = ext;
while (*(--ext) != '.');
if (tmp - ext - 1 < LONGEST_EXT) l = tmp - ext - 1;
}
ext++;
for (i = 0; i < NUM_FTYPES; i++)
{
unsigned int flags = file_formats[i].flags;
if ((flags & FF_NOSAVE) || !(flags & mask)) continue;
if (!strncasecmp(ext, file_formats[i].ext, l))
return (i);
if (!file_formats[i].ext2[0]) continue;
if (!strncasecmp(ext, file_formats[i].ext2, l))
return (i);
}
return (FT_NONE);
}
/* Set palette to white and black */
static void set_bw(ls_settings *settings)
{
static const png_color wb[2] = { { 255, 255, 255 }, { 0, 0, 0 } };
settings->colors = 2;
memcpy(settings->pal, wb, sizeof(wb));
}
/* Set palette to grayscale */
static void set_gray(ls_settings *settings)
{
settings->colors = 256;
mem_bw_pal(settings->pal, 0, 255);
}
static int check_next_frame(frameset *fset, int mode, int anim)
{
int lim = mode != FS_LAYER_LOAD ? FRAMES_MAX : anim ? MAX_LAYERS - 1 :
MAX_LAYERS;
return (fset->cnt < lim);
}
static int write_out_frame(char *file_name, ani_settings *ani, ls_settings *f_set);
static int process_page_frame(char *file_name, ani_settings *ani, ls_settings *w_set)
{
image_frame *frame;
if (ani->settings.mode == FS_EXPLODE_FRAMES)
return (write_out_frame(file_name, ani, w_set));
/* Store a new frame */
// !!! Currently, frames are allocated without checking any limits
if (!mem_add_frame(&ani->fset, w_set->width, w_set->height,
w_set->bpp, CMASK_NONE, w_set->pal)) return (FILE_MEM_ERROR);
frame = ani->fset.frames + (ani->fset.cnt - 1);
frame->cols = w_set->colors;
frame->trans = w_set->xpm_trans;
frame->delay = 0;
frame->x = w_set->x;
frame->y = w_set->y;
memcpy(frame->img, w_set->img, sizeof(chanlist));
return (0);
}
/* Receives struct with image parameters, and channel flags;
* returns 0 for success, or an error code;
* success doesn't mean that anything was allocated, loader must check that;
* loader may call this multiple times - say, for each channel */
static int allocate_image(ls_settings *settings, int cmask)
{
size_t sz, l;
int i, j, oldmask, mode = settings->mode;
if ((settings->width < 1) || (settings->height < 1)) return (-1);
if ((settings->width > MAX_WIDTH) || (settings->height > MAX_HEIGHT))
return (TOO_BIG);
/* Don't show progress bar where there's no need */
if (settings->width * settings->height <= (1 << silence_limit))
settings->silent = TRUE;
/* Reduce cmask according to mode */
if (mode == FS_CLIP_FILE) cmask &= CMASK_CLIP;
else if (mode == FS_CLIPBOARD) cmask &= CMASK_RGBA;
else if ((mode == FS_CHANNEL_LOAD) || (mode == FS_PATTERN_LOAD))
cmask &= CMASK_IMAGE;
/* Overwriting is allowed */
oldmask = cmask_from(settings->img);
cmask &= ~oldmask;
if (!cmask) return (0); // Already allocated
/* No utility channels without image */
oldmask |= cmask;
if (!(oldmask & CMASK_IMAGE)) return (-1);
j = TRUE; // For FS_LAYER_LOAD
sz = (size_t)settings->width * settings->height;
switch (mode)
{
case FS_PNG_LOAD: /* Regular image */
/* Reserve memory */
j = undo_next_core(UC_CREATE | UC_GETMEM, settings->width,
settings->height, settings->bpp, oldmask);
/* Drop current image if not enough memory for undo */
if (j) mem_free_image(&mem_image, FREE_IMAGE);
case FS_EXPLODE_FRAMES: /* Frames' temporaries */
case FS_LAYER_LOAD: /* Layers */
/* Allocate, or at least try to */
for (i = 0; i < NUM_CHANNELS; i++)
{
if (!(cmask & CMASK_FOR(i))) continue;
l = i == CHN_IMAGE ? sz * settings->bpp : sz;
settings->img[i] = j ? malloc(l) : mem_try_malloc(l);
if (!settings->img[i]) return (FILE_MEM_ERROR);
}
break;
case FS_CLIP_FILE: /* Clipboard */
case FS_CLIPBOARD:
/* Allocate the entire batch at once */
if (cmask & CMASK_IMAGE)
{
j = mem_clip_new(settings->width, settings->height,
settings->bpp, cmask, FALSE);
if (j) return (FILE_MEM_ERROR);
memcpy(settings->img, mem_clip.img, sizeof(chanlist));
break;
}
/* Try to add clipboard alpha and/or mask */
for (i = 0; i < NUM_CHANNELS; i++)
{
if (!(cmask & CMASK_FOR(i))) continue;
if (!(settings->img[i] = mem_clip.img[i] = malloc(sz)))
return (FILE_MEM_ERROR);
}
break;
case FS_CHANNEL_LOAD: /* Current channel */
/* Dimensions & depth have to be the same */
if ((settings->width != mem_width) ||
(settings->height != mem_height) ||
(settings->bpp != MEM_BPP)) return (-1);
/* Reserve memory */
j = undo_next_core(UC_CREATE | UC_GETMEM, settings->width,
settings->height, settings->bpp, CMASK_CURR);
if (j) return (FILE_MEM_ERROR);
/* Allocate */
settings->img[CHN_IMAGE] = mem_try_malloc(sz * settings->bpp);
if (!settings->img[CHN_IMAGE]) return (FILE_MEM_ERROR);
break;
case FS_PATTERN_LOAD: /* Patterns */
settings->silent = TRUE;
/* Fixed dimensions and depth */
if ((settings->width != PATTERN_GRID_W * 8) ||
(settings->height != PATTERN_GRID_H * 8) ||
(settings->bpp != 1)) return (-1);
/* Allocate temp memory */
settings->img[CHN_IMAGE] = calloc(1, sz);
if (!settings->img[CHN_IMAGE]) return (FILE_MEM_ERROR);
break;
case FS_PALETTE_LOAD: /* Palette */
case FS_PALETTE_DEF:
return (-1); // Should not arrive here if palette is present
}
return (0);
}
/* Receives struct with image parameters, and which channels to deallocate */
static void deallocate_image(ls_settings *settings, int cmask)
{
int i;
/* No deallocating image channel */
if (!(cmask &= ~CMASK_IMAGE)) return;
for (i = 0; i < NUM_CHANNELS; i++)
{
if (!(cmask & CMASK_FOR(i))) continue;
if (!settings->img[i]) continue;
free(settings->img[i]);
settings->img[i] = NULL;
/* Clipboard */
if ((settings->mode == FS_CLIP_FILE) ||
(settings->mode == FS_CLIPBOARD))
mem_clip.img[i] = NULL;
}
}
typedef struct {
FILE *file; // for traditional use
char *buf; // data block
int here; // current position
int top; // end of data
int size; // currently allocated
} memFILE;
static int mfextend(memFILE *mf, size_t length)
{
size_t l = mf->here + length, l2 = mf->size * 2;
unsigned char *tmp = NULL;
if (l2 > l) tmp = realloc(mf->buf, l2);
if (!tmp) tmp = realloc(mf->buf, l2 = l);
if (!tmp) return (FALSE);
mf->buf = tmp;
mf->size = l2;
return (TRUE);
}
static size_t mfread(void *ptr, size_t size, size_t nmemb, memFILE *mf)
{
size_t l, m;
if (mf->file) return (fread(ptr, size, nmemb, mf->file));
l = size * nmemb; m = mf->top - mf->here;
if ((mf->here < 0) || (m < 0)) return (0);
if (l > m) l = m , nmemb = m / size;
memcpy(ptr, mf->buf + mf->here, l);
mf->here += l;
return (nmemb);
}
static size_t mfwrite(void *ptr, size_t size, size_t nmemb, memFILE *mf)
{
size_t l, m;
if (mf->file) return (fwrite(ptr, size, nmemb, mf->file));
if (mf->here < 0) return (0);
l = size * nmemb; m = mf->size - mf->here;
if ((l > m) && !mfextend(mf, l)) l = m , nmemb = m / size;
memcpy(mf->buf + mf->here, ptr, l);
// !!! Nothing in here does fseek() when writing, so no need to track mf->top
mf->top = mf->here += l;
return (nmemb);
}
static int mfseek(memFILE *mf, long offset, int mode)
{
// !!! For operating on tarballs, adjust fseek() params here
if (mf->file) return (fseek(mf->file, offset, mode));
if (mode == SEEK_SET);
else if (mode == SEEK_CUR) offset += mf->here;
else if (mode == SEEK_END) offset += mf->top;
else return (-1);
mf->here = offset;
return (0);
}
/* Fills temp buffer row, or returns image row if no buffer */
static unsigned char *prepare_row(unsigned char *buf, ls_settings *settings,
int bpp, int y)
{
unsigned char *tmp, *tmi, *tma, *tms;
int i, j, w = settings->width, h = y * w;
int bgr = settings->ftype == FT_PNG ? 0 : 2;
tmi = settings->img[CHN_IMAGE] + h * settings->bpp;
if (bpp < (bgr ? 3 : 4)) /* Return/copy image row */
{
if (!buf) return (tmi);
memcpy(buf, tmi, w * bpp);
return (buf);
}
/* Produce BGR / BGRx / RGBx */
tmp = buf;
if (settings->bpp == 1) // Indexed
{
png_color *pal = settings->pal;
for (i = 0; i < w; tmp += bpp , i++)
{
png_color *col = pal + *tmi++;
tmp[bgr] = col->red;
tmp[1] = col->green;
tmp[bgr ^ 2] = col->blue;
}
}
else // RGB
{
for (i = 0; i < w; tmp += bpp , tmi += 3 , i++)
{
tmp[0] = tmi[bgr];
tmp[1] = tmi[1];
tmp[2] = tmi[bgr ^ 2];
}
}
/* Add alpha to the mix */
tmp = buf + 3;
tma = settings->img[CHN_ALPHA] + h;
if (bpp == 3); // No alpha - all done
else if ((settings->mode != FS_CLIPBOARD) || !settings->img[CHN_SEL])
{
// Only alpha here
for (i = 0; i < w; tmp += bpp , i++)
*tmp = *tma++;
}
else
{
// Merge alpha and selection
tms = settings->img[CHN_SEL] + h;
for (i = 0; i < w; tmp += bpp , i++)
{
j = *tma++ * *tms++;
*tmp = (j + (j >> 8) + 1) >> 8;
}
}
return (buf);
}
/* Converts palette-based transparency to color transparency or alpha channel */
static int palette_trans(ls_settings *settings, unsigned char ttb[256])
{
int i, n, res;
/* Count transparent colors */
for (i = n = 0; i < 256; i++) n += ttb[i] < 255;
/* None means no transparency */
settings->xpm_trans = -1;
if (!n) return (0);
/* One fully transparent color means color transparency */
if (n == 1)
{
for (i = 0; i < 256; i++)
{
if (ttb[i]) continue;
settings->xpm_trans = i;
return (0);
}
}
/* Anything else means alpha transparency */
res = allocate_image(settings, CMASK_FOR(CHN_ALPHA));
if (!res && settings->img[CHN_ALPHA])
{
unsigned char *src, *dest;
size_t i = (size_t)settings->width * settings->height;
src = settings->img[CHN_IMAGE];
dest = settings->img[CHN_ALPHA];
while (i-- > 0) *dest++ = ttb[*src++];
}
return (res);
}
static void ls_init(char *what, int save)
{
char buf[256];
sprintf(buf, save ? _("Saving %s image") : _("Loading %s image"), what);
progress_init(buf, 0);
}
static void ls_progress(ls_settings *settings, int n, int steps)
{
int h = settings->height;
if (!settings->silent && ((n * steps) % h >= h - steps))
progress_update((float)n / h);
}
#if PNG_LIBPNG_VER >= 10400 /* 1.4+ */
#define png_set_gray_1_2_4_to_8(X) png_set_expand_gray_1_2_4_to_8(X)
#endif
/* !!! libpng 1.2.17-1.2.24 was losing extra chunks if there was no callback */
static int buggy_libpng_handler()
{
return (0);
}
static void png_memread(png_structp png_ptr, png_bytep data, png_size_t length)
{
memFILE *mf = (memFILE *)png_get_io_ptr(png_ptr);
// memFILE *mf = (memFILE *)png_ptr->io_ptr;
size_t l = mf->top - mf->here;
if (l > length) l = length;
memcpy(data, mf->buf + mf->here, l);
mf->here += l;
if (l < length) png_error(png_ptr, "Read Error");
}
static void png_memwrite(png_structp png_ptr, png_bytep data, png_size_t length)
{
memFILE *mf = (memFILE *)png_get_io_ptr(png_ptr);
// memFILE *mf = (memFILE *)png_ptr->io_ptr;
if ((mf->here + length > mf->size) && !mfextend(mf, length))
png_error(png_ptr, "Write Error");
else
{
memcpy(mf->buf + mf->here, data, length);
mf->top = mf->here += length;
}
}
static void png_memflush(png_structp png_ptr)
{
/* Does nothing */
}
#define PNG_BYTES_TO_CHECK 8
#define PNG_HANDLE_CHUNK_ALWAYS 3
static const char *chunk_names[NUM_CHANNELS] = { "", "alPh", "seLc", "maSk" };
static int load_png(char *file_name, ls_settings *settings, memFILE *mf)
{
/* Description of PNG interlacing passes as X0, DX, Y0, DY */
static const unsigned char png_interlace[8][4] = {
{0, 1, 0, 1}, /* One pass for non-interlaced */
{0, 8, 0, 8}, /* Seven passes for Adam7 interlaced */
{4, 8, 0, 8},
{0, 4, 4, 8},
{2, 4, 0, 4},
{0, 2, 2, 4},
{1, 2, 0, 2},
{0, 1, 1, 2}
};
static png_bytep *row_pointers;
static char *msg;
png_structp png_ptr;
png_infop info_ptr;
png_unknown_chunkp uk_p;
png_uint_32 pwidth, pheight;
char buf[PNG_BYTES_TO_CHECK + 1];
unsigned char trans[256], *src, *dest, *dsta;
long dest_len;
FILE *fp = NULL;
int i, j, k, bit_depth, color_type, interlace_type, num_uk, res = -1;
int maxpass, x0, dx, y0, dy, n, nx, height, width, itrans = FALSE;
if (!mf)
{
if ((fp = fopen(file_name, "rb")) == NULL) return -1;
i = fread(buf, 1, PNG_BYTES_TO_CHECK, fp);
}
else i = mfread(buf, 1, PNG_BYTES_TO_CHECK, mf);
if (i != PNG_BYTES_TO_CHECK) goto fail;
if (png_sig_cmp(buf, 0, PNG_BYTES_TO_CHECK)) goto fail;
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) goto fail;
row_pointers = NULL; msg = NULL;
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) goto fail2;
if (setjmp(png_jmpbuf(png_ptr)))
{
res = FILE_LIB_ERROR;
goto fail2;
}
/* !!! libpng 1.2.17-1.2.24 needs this to read extra channels */
png_set_read_user_chunk_fn(png_ptr, NULL, buggy_libpng_handler);
if (!mf) png_init_io(png_ptr, fp);
else png_set_read_fn(png_ptr, mf, png_memread);
png_set_sig_bytes(png_ptr, PNG_BYTES_TO_CHECK);
/* Stupid libpng handles private chunks on all-or-nothing basis */
png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0);
png_read_info(png_ptr, info_ptr);
png_get_IHDR(png_ptr, info_ptr, &pwidth, &pheight, &bit_depth, &color_type,
&interlace_type, NULL, NULL);
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_PLTE))
{
png_colorp png_palette;
png_get_PLTE(png_ptr, info_ptr, &png_palette, &settings->colors);
memcpy(settings->pal, png_palette, settings->colors * sizeof(png_color));
/* If palette is all we need */
res = 1;
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF)) goto fail3;
}
res = TOO_BIG;
if ((pwidth > MAX_WIDTH) || (pheight > MAX_HEIGHT)) goto fail2;
/* Call allocator for image data */
settings->width = width = (int)pwidth;
settings->height = height = (int)pheight;
settings->bpp = 1;
if ((color_type != PNG_COLOR_TYPE_PALETTE) || (bit_depth > 8))
settings->bpp = 3;
i = CMASK_IMAGE;
if ((color_type == PNG_COLOR_TYPE_RGB_ALPHA) ||
(color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) i = CMASK_RGBA;
if ((res = allocate_image(settings, i))) goto fail2;
res = FILE_MEM_ERROR;
i = sizeof(png_bytep) * height;
row_pointers = malloc(i + width * 4);
if (!row_pointers) goto fail2;
row_pointers[0] = (char *)row_pointers + i;
if (!settings->silent)
{
switch(settings->mode)
{
case FS_PNG_LOAD:
msg = "PNG";
break;
case FS_CLIP_FILE:
case FS_CLIPBOARD:
msg = _("Clipboard");
break;
}
}
if (msg) ls_init(msg, 0);
res = -1;
/* RGB PNG file */
if (settings->bpp == 3)
{
png_set_strip_16(png_ptr);
png_set_gray_1_2_4_to_8(png_ptr);
png_set_palette_to_rgb(png_ptr);
png_set_gray_to_rgb(png_ptr);
/* Is there a transparent color? */
settings->rgb_trans = -1;
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
{
png_color_16p trans_rgb;
png_get_tRNS(png_ptr, info_ptr, NULL, NULL, &trans_rgb);
if (color_type == PNG_COLOR_TYPE_GRAY)
{
i = trans_rgb->gray;
switch (bit_depth)
{
case 1: i *= 0xFF; break;
case 2: i *= 0x55; break;
case 4: i *= 0x11; break;
case 8: default: break;
/* Hope libpng compiled w/o accurate transform */
case 16: i >>= 8; break;
}
settings->rgb_trans = RGB_2_INT(i, i, i);
}
else settings->rgb_trans = RGB_2_INT(trans_rgb->red,
trans_rgb->green, trans_rgb->blue);
}
if (settings->img[CHN_ALPHA]) /* RGBA */
{
nx = height;
/* Have to do deinterlacing myself */
if (interlace_type == PNG_INTERLACE_NONE)
{
k = 0; maxpass = 1;
}
else if (interlace_type == PNG_INTERLACE_ADAM7)
{
k = 1; maxpass = 8;
nx = (nx + 7) & ~7; nx += 7 * (nx >> 3);
}
else goto fail2; /* Unknown type */
for (n = 0; k < maxpass; k++)
{
x0 = png_interlace[k][0];
dx = png_interlace[k][1];
y0 = png_interlace[k][2];
dy = png_interlace[k][3];
for (i = y0; i < height; i += dy , n++)
{
png_read_rows(png_ptr, &row_pointers[0], NULL, 1);
src = row_pointers[0];
dest = settings->img[CHN_IMAGE] + (i * width + x0) * 3;
dsta = settings->img[CHN_ALPHA] + i * width;
for (j = x0; j < width; j += dx)
{
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dsta[j] = src[3];
src += 4; dest += 3 * dx;
}
if (msg && ((n * 20) % nx >= nx - 20))
progress_update((float)n / nx);
}
}
}
else /* RGB */
{
png_set_strip_alpha(png_ptr);
for (i = 0; i < height; i++)
{
row_pointers[i] = settings->img[CHN_IMAGE] + i * width * 3;
}
png_read_image(png_ptr, row_pointers);
}
}
/* Paletted PNG file */
else
{
/* Is there a transparent index? */
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
{
png_bytep ptrans;
int ltrans;
png_get_tRNS(png_ptr, info_ptr, &ptrans, <rans, NULL);
memset(trans, 255, 256);
memcpy(trans, ptrans, ltrans);
itrans = TRUE;
}
png_set_strip_16(png_ptr);
png_set_strip_alpha(png_ptr);
png_set_packing(png_ptr);
if ((color_type == PNG_COLOR_TYPE_GRAY) && (bit_depth < 8))
png_set_gray_1_2_4_to_8(png_ptr);
for (i = 0; i < height; i++)
{
row_pointers[i] = settings->img[CHN_IMAGE] + i * width;
}
png_read_image(png_ptr, row_pointers);
}
if (msg) progress_update(1.0);
png_read_end(png_ptr, info_ptr);
res = 0;
/* Apply palette transparency */
if (itrans) res = palette_trans(settings, trans);
num_uk = png_get_unknown_chunks(png_ptr, info_ptr, &uk_p);
if (num_uk) /* File contains mtPaint's private chunks */
{
for (i = 0; i < num_uk; i++) /* Examine each chunk */
{
for (j = CHN_ALPHA; j < NUM_CHANNELS; j++)
{
if (!strcmp(uk_p[i].name, chunk_names[j])) break;
}
if (j >= NUM_CHANNELS) continue;
/* Try to allocate a channel */
if ((res = allocate_image(settings, CMASK_FOR(j)))) break;
/* Skip if not allocated */
if (!settings->img[j]) continue;
dest_len = width * height;
uncompress(settings->img[j], &dest_len, uk_p[i].data,
uk_p[i].size);
}
/* !!! Is this call really needed? */
png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, -1);
}
if (!res) res = 1;
#ifdef U_LCMS
#ifdef PNG_iCCP_SUPPORTED
/* Extract ICC profile if it's of use */
if (!settings->icc_size)
{
png_charp name, icc;
png_uint_32 len;
int comp;
if (png_get_iCCP(png_ptr, info_ptr, &name, &comp, &icc, &len) &&
(len < INT_MAX) && (settings->icc = malloc(len)))
{
settings->icc_size = len;
memcpy(settings->icc, icc, len);
}
}
#endif
#endif
fail2: if (msg) progress_end();
free(row_pointers);
fail3: png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
fail: if (fp) fclose(fp);
return (res);
}
#ifndef PNG_AFTER_IDAT
#define PNG_AFTER_IDAT 8
#endif
static int save_png(char *file_name, ls_settings *settings, memFILE *mf)
{
png_unknown_chunk unknown0;
png_structp png_ptr;
png_infop info_ptr;
FILE *fp = NULL;
int h = settings->height, w = settings->width, bpp = settings->bpp;
int i, chunks = 0, res = -1;
long uninit_(dest_len), res_len;
char *mess = NULL;
unsigned char trans[256], *tmp, *rgba_row = NULL;
png_color_16 trans_rgb;
/* Baseline PNG format does not support alpha for indexed images, so
* we have to convert them to RGBA for clipboard export - WJ */
if (((settings->mode == FS_CLIPBOARD) || (bpp == 3)) &&
settings->img[CHN_ALPHA])
{
rgba_row = malloc(w * 4);
if (!rgba_row) return (-1);
bpp = 4;
}
if (!settings->silent)
switch(settings->mode)
{
case FS_PNG_SAVE:
mess = "PNG";
break;
case FS_CLIP_FILE:
case FS_CLIPBOARD:
mess = _("Clipboard");
break;
case FS_COMPOSITE_SAVE:
mess = _("Layer");
break;
case FS_CHANNEL_SAVE:
mess = _("Channel");
break;
default:
settings->silent = TRUE;
break;
}
if (!mf && ((fp = fopen(file_name, "wb")) == NULL)) goto exit0;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, NULL, NULL);
if (!png_ptr) goto exit1;
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) goto exit2;
res = 0;
if (!mf) png_init_io(png_ptr, fp);
else png_set_write_fn(png_ptr, mf, png_memwrite, png_memflush);
png_set_compression_level(png_ptr, settings->png_compression);
if (bpp == 1)
{
png_set_IHDR(png_ptr, info_ptr, w, h,
8, PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
png_set_PLTE(png_ptr, info_ptr, settings->pal, settings->colors);
/* Transparent index in use */
if ((settings->xpm_trans > -1) && (settings->xpm_trans < 256))
{
memset(trans, 255, 256);
trans[settings->xpm_trans] = 0;
png_set_tRNS(png_ptr, info_ptr, trans, settings->colors, 0);
}
}
else
{
png_set_IHDR(png_ptr, info_ptr, w, h,
8, bpp == 4 ? PNG_COLOR_TYPE_RGB_ALPHA :
PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
if (settings->pal) png_set_PLTE(png_ptr, info_ptr, settings->pal,
settings->colors);
/* Transparent index in use */
if ((settings->rgb_trans > -1) && !settings->img[CHN_ALPHA])
{
trans_rgb.red = INT_2_R(settings->rgb_trans);
trans_rgb.green = INT_2_G(settings->rgb_trans);
trans_rgb.blue = INT_2_B(settings->rgb_trans);
png_set_tRNS(png_ptr, info_ptr, 0, 1, &trans_rgb);
}
}
png_write_info(png_ptr, info_ptr);
if (mess) ls_init(mess, 1);
for (i = 0; i < h; i++)
{
tmp = prepare_row(rgba_row, settings, bpp, i);
png_write_row(png_ptr, (png_bytep)tmp);
ls_progress(settings, i, 20);
}
/* Save private chunks into PNG file if we need to */
tmp = NULL;
i = bpp == 1 ? CHN_ALPHA : CHN_ALPHA + 1;
if (settings->mode == FS_CLIPBOARD) i = NUM_CHANNELS; // Disable extensions
for (; i < NUM_CHANNELS; i++)
{
if (!settings->img[i]) continue;
if (!tmp)
{
/* Get size required for each zlib compress */
w = settings->width * settings->height;
#if ZLIB_VERNUM >= 0x1200
dest_len = compressBound(w);
#else
dest_len = w + (w >> 8) + 32;
#endif
res = -1;
tmp = malloc(dest_len); // Temporary space for compression
if (!tmp) break;
res = 0;
}
res_len = dest_len;
if (compress2(tmp, &res_len, settings->img[i], w,
settings->png_compression) != Z_OK) continue;
strncpy(unknown0.name, chunk_names[i], 5);
unknown0.data = tmp;
unknown0.size = res_len;
png_set_unknown_chunks(png_ptr, info_ptr, &unknown0, 1);
png_set_unknown_chunk_location(png_ptr, info_ptr,
chunks++, PNG_AFTER_IDAT);
}
free(tmp);
png_write_end(png_ptr, info_ptr);
if (mess) progress_end();
/* Tidy up */
exit2: png_destroy_write_struct(&png_ptr, &info_ptr);
exit1: if (fp) fclose(fp);
exit0: free(rgba_row);
return (res);
}
#ifdef U_GIF
/* *** PREFACE ***
* Contrary to what GIF89 docs say, all contemporary browser implementations
* always render background in an animated GIF as transparent. So does mtPaint,
* for some GIF animations depend on this rule.
* An inter-frame delay of 0 normally means that the two (or more) frames
* are parts of same animation frame and should be rendered as one resulting
* frame; but some (ancient) GIFs have all delays set to 0, but still contain
* animation sequences. So the handling of zero-delay frames is user-selectable
* in mtPaint. */
/* Animation state */
typedef struct {
unsigned char lmap[MAX_DIM];
image_frame prev;
int prev_idx; // Frame index+1, so that 0 means None
int defw, defh, bk_rect[4];
int mode;
/* Extra fields for paletted images */
int global_cols, newcols, newtrans;
png_color global_pal[256], newpal[256];
unsigned char xlat[513];
} ani_status;
/* Calculate new frame dimensions, and point-in-area bitmap */
static void ani_map_frame(ani_status *stat, ls_settings *settings)
{
unsigned char *lmap;
int i, j, w, h;
/* Calculate the new dimensions */
// !!! Offsets considered nonnegative (as in GIF)
w = settings->x + settings->width;
if (stat->defw < w) stat->defw = w;
h = settings->y + settings->height;
if (stat->defh < h) stat->defh = h;
/* The bitmap works this way: "Xth byte & (Yth byte >> 4)" tells which
* area(s) the pixel (X,Y) is in: bit 0 is for image (the new one),
* bit 1 is for underlayer (the previous composited frame), and bit 2
* is for hole in it (if "restore to background" was last) */
j = stat->defw > stat->defh ? stat->defw : stat->defh;
memset(lmap = stat->lmap, 0, j);
// Mark new frame
for (i = settings->x , j = i + settings->width; i < j; i++)
lmap[i] |= 0x01; // Image bit
for (i = settings->y , j = i + settings->height; i < j; i++)
lmap[i] |= 0x10; // Image mask bit
// Mark previous frame
if (stat->prev_idx)
{
for (i = stat->prev.x , j = i + stat->prev.width; i < j; i++)
lmap[i] |= 0x02; // Underlayer bit
for (i = stat->prev.y , j = i + stat->prev.height; i < j; i++)
lmap[i] |= 0x20; // Underlayer mask bit
}
// Mark disposal area
if ((stat->bk_rect[0] < stat->bk_rect[2]) &&
(stat->bk_rect[1] < stat->bk_rect[3])) // Add bkg rectangle
{
for (i = stat->bk_rect[0] , j = stat->bk_rect[2]; i < j; i++)
lmap[i] |= 0x04; // Background bit
for (i = stat->bk_rect[1] , j = stat->bk_rect[3]; i < j; i++)
lmap[i] |= 0x40; // Background mask bit
}
}
static int analyze_gif_frame(ani_status *stat, ls_settings *settings)
{
unsigned char cmap[513], *lmap, *fg, *bg;
png_color *pal, *prev;
int tmpal[257], same_size, show_under;
int i, k, l, x, y, ul, lpal, lprev, fgw, bgw, prevtr = -1;
/* Locate the new palette */
pal = prev = stat->global_pal;
lpal = lprev = stat->global_cols;
if (settings->colors > 0)
{
pal = settings->pal;
lpal = settings->colors;
}
/* Accept new palette as final, for now */
mem_pal_copy(stat->newpal, pal);
stat->newcols = lpal;
stat->newtrans = settings->xpm_trans;
/* Prepare for new frame */
if (stat->mode == ANM_RAW) // Raw frame mode
{
stat->defw = settings->width;
stat->defh = settings->height;
return (0);
}
ani_map_frame(stat, settings);
same_size = !((stat->defw ^ settings->width) |
(stat->defh ^ settings->height));
for (i = 0; i < 256; i++) stat->xlat[i] = stat->xlat[i + 256] = i;
stat->xlat[512] = stat->newtrans;
/* First frame is exceptional */
if (!stat->prev_idx)
{
// Trivial if no background gets drawn
if (same_size) return (0);
// Trivial if have transparent color
if (settings->xpm_trans >= 0) return (1);
}
/* Disable transparency by default, enable when needed */
stat->newtrans = -1;
/* Now scan the dest area, filling colors bitmap */
memset(cmap, 0, sizeof(cmap));
fgw = settings->width;
fg = settings->img[CHN_IMAGE] - (settings->y * fgw + settings->x);
// Set underlayer pointer & step (ignore bpp!)
bgw = stat->prev.width;
bg = stat->prev.img[CHN_IMAGE] - (stat->prev.y * bgw + stat->prev.x);
lmap = stat->lmap;
for (y = 0; y < stat->defh; y++)
{
int ww = stat->defw, tp = settings->xpm_trans;
int bmask = lmap[y] >> 4;
for (x = 0; x < ww; x++)
{
int c0, bflag = lmap[x] & bmask;
if ((bflag & 1) && ((c0 = fg[x]) != tp)) // New frame
c0 += 256;
else if ((bflag & 6) == 2) // Underlayer
c0 = bg[x];
else c0 = 512; // Background (transparency)
cmap[c0] = 1;
}
fg += fgw; bg += bgw;
}
/* If we have underlayer */
show_under = 0;
if (stat->prev_idx)
{
// Use per-frame palette if underlayer has it
prev = stat->prev.pal;
lprev = stat->prev.cols;
prevtr = stat->prev.trans;
// Move underlayer transparency to "transparent"
if (prevtr >= 0)
{
cmap[512] |= cmap[prevtr];
cmap[prevtr] = 0;
}
// Check if underlayer is at all visible
show_under = !!memchr(cmap, 1, 256);
// Visible RGB/RGBA underlayer means RGB/RGBA frame
if (show_under && (stat->prev.bpp == 3)) goto RGB;
}
/* Now, check if either frame's palette is enough */
ul = 2; // Default is new palette
if (show_under)
{
l = lprev > lpal ? lprev : lpal;
k = lprev > lpal ? lpal : lprev;
for (ul = 3 , i = 0; ul && (i < l); i++)
{
int tf2 = cmap[i] * 2 + cmap[256 + i];
if (tf2 && ((i >= k) ||
(PNG_2_INT(prev[i]) != PNG_2_INT(pal[i]))))
ul &= ~tf2; // Exclude mismatched palette(s)
}
if (ul == 1) // Need old palette
{
mem_pal_copy(stat->newpal, prev);
stat->newcols = lprev;
}
}
while (ul) // Place transparency
{
if (cmap[512]) // Need transparency
{
int i, l = prevtr, nc = stat->newcols;
/* If cannot use old transparent index */
if ((l < 0) || (l >= nc) || (cmap[l] | cmap[l + 256]))
l = settings->xpm_trans;
/* If cannot use new one either */
if ((l < 0) || (l >= nc) || (cmap[l] | cmap[l + 256]))
{
/* Try to find unused palette slot */
for (l = -1 , i = 0; (l < 0) && (i < nc); i++)
if (!(cmap[i] | cmap[i + 256])) l = i;
}
if (l < 0) /* Try to add a palette slot */
{
png_color *c;
if (nc >= 256) break; // Failure
l = stat->newcols++;
c = stat->newpal + l;
c->red = c->green = c->blue = 0;
}
// Modify mapping
if (prevtr >= 0) stat->xlat[prevtr] = l;
stat->xlat[512] = stat->newtrans = l;
}
// Successfully mapped everything - use paletted mode
return (same_size ? 0 : 1);
}
/* Try to build combined palette */
for (ul = i = 0; (ul < 257) && (i < 512); i++)
{
png_color *c;
int j, v;
if (!cmap[i]) continue;
c = (i < 256 ? prev : pal - 256) + i;
v = PNG_2_INT(*c);
for (j = 0; (j < ul) && (tmpal[j] != v); j++);
if (j == ul) tmpal[ul++] = v;
stat->xlat[i] = j;
}
// Add transparent color
if ((ul < 257) && cmap[512])
{
// Modify mapping
if (prevtr >= 0) stat->xlat[prevtr] = ul;
stat->xlat[512] = stat->newtrans = ul;
tmpal[ul++] = 0;
}
if (ul < 257) // Success!
{
png_color *c = stat->newpal;
for (i = 0; i < ul; i++ , c++) // Build palette
{
int v = tmpal[i];
c->red = INT_2_R(v);
c->green = INT_2_G(v);
c->blue = INT_2_B(v);
}
stat->newcols = ul;
// Use paletted mode
return (same_size ? 0 : 1);
}
/* Tried everything in vain - fall back to RGB/RGBA */
RGB: if (stat->global_cols > 0) // Use default palette if present
{
mem_pal_copy(stat->newpal, stat->global_pal);
stat->newcols = stat->global_cols;
}
stat->newtrans = -1; // No color-key transparency
// RGBA if underlayer with alpha, or transparent backround, is visible
if ((show_under && stat->prev.img[CHN_ALPHA]) || cmap[512])
return (4);
// RGB otherwise
return (3);
}
/* Convenience wrapper - expand palette to RGB triples */
static unsigned char *pal2rgb(unsigned char *rgb, png_color *pal)
{
int i;
if (!pal) return (rgb + 768); // Nothing to expand
for (i = 0; i < 256; i++ , rgb += 3 , pal++)
{
rgb[0] = pal->red;
rgb[1] = pal->green;
rgb[2] = pal->blue;
}
return (rgb);
}
static void composite_gif_frame(frameset *fset, ani_status *stat,
ls_settings *settings)
{
unsigned char *dest, *fg0, *bg0 = NULL, *lmap = stat->lmap;
image_frame *frame = fset->frames + (fset->cnt - 1), *bkf = &stat->prev;
int disposal, w, fgw, bgw = 0, urgb = 0, tp = settings->xpm_trans;
frame->trans = stat->newtrans;
/* In raw mode, just store the offsets */
if (stat->mode == ANM_RAW)
{
frame->x = settings->x;
frame->y = settings->y;
goto done;
}
/* Read & clear disposal mode */
disposal = frame->flags & FM_DISPOSAL;
frame->flags ^= disposal ^ FM_DISP_REMOVE;
w = frame->width;
dest = frame->img[CHN_IMAGE];
fgw = settings->width;
fg0 = settings->img[CHN_IMAGE] ? settings->img[CHN_IMAGE] -
(settings->y * fgw + settings->x) : dest; // Always indexed (1 bpp)
/* Pointer to absent underlayer is no problem - it just won't get used */
bgw = bkf->width;
bg0 = bkf->img[CHN_IMAGE] - (bkf->y * bgw + bkf->x) * bkf->bpp;
urgb = bkf->bpp != 1;
if (frame->bpp == 1) // To indexed
{
unsigned char *fg = fg0, *bg = bg0, *xlat = stat->xlat;
int x, y;
for (y = 0; y < frame->height; y++)
{
int bmask = lmap[y] >> 4;
for (x = 0; x < w; x++)
{
int c0, bflag = lmap[x] & bmask;
if ((bflag & 1) && ((c0 = fg[x]) != tp)) // New frame
c0 += 256;
else if ((bflag & 6) == 2) // Underlayer
c0 = bg[x];
else c0 = 512; // Background (transparent)
*dest++ = xlat[c0];
}
fg += fgw; bg += bgw;
}
}
else // To RGB
{
unsigned char rgb[513 * 3], *tmp, *fg = fg0, *bg = bg0;
int x, y, bpp = urgb + urgb + 1;
/* Setup global palette map: underlayer, image, background */
tmp = pal2rgb(rgb, bkf->pal);
tmp = pal2rgb(tmp, settings->pal);
tmp[0] = tmp[1] = tmp[2] = 0;
frame->trans = -1; // No color-key transparency
for (y = 0; y < frame->height; y++)
{
int bmask = lmap[y] >> 4;
for (x = 0; x < w; x++)
{
unsigned char *src;
int c0, bflag = lmap[x] & bmask;
if ((bflag & 1) && ((c0 = fg[x]) != tp)) // New frame
src = rgb + (256 * 3) + (c0 * 3);
else if ((bflag & 6) == 2) // Underlayer
src = urgb ? bg + x * 3 : rgb + bg[x] * 3;
else src = rgb + 512 * 3; // Background (black)
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dest += 3;
}
fg += fgw; bg += bgw * bpp;
}
}
if (frame->img[CHN_ALPHA]) // To alpha
{
unsigned char *fg = fg0, *bg = NULL;
int x, y, af = 0, utp = -1;
dest = frame->img[CHN_ALPHA];
utp = bkf->bpp == 1 ? bkf->trans : -1;
af = !!bkf->img[CHN_ALPHA]; // Underlayer has alpha
bg = bkf->img[af ? CHN_ALPHA : CHN_IMAGE] - (bkf->y * bgw + bkf->x);
for (y = 0; y < frame->height; y++)
{
int bmask = lmap[y] >> 4;
for (x = 0; x < w; x++)
{
int c0, bflag = lmap[x] & bmask;
if ((bflag & 1) && (fg[x] != tp)) // New frame
c0 = 255;
else if ((bflag & 6) == 2) // Underlayer
{
c0 = bg[x];
if (!af) c0 = c0 != utp ? 255 : 0;
}
else c0 = 0; // Background (transparent)
*dest++ = c0;
}
fg += fgw; bg += bgw;
}
}
/* Prepare the disposal action */
memset(&stat->bk_rect, 0, sizeof(stat->bk_rect)); // Clear old
switch (disposal)
{
case FM_DISP_REMOVE: // Dispose to background
// Image-sized hole in underlayer
stat->bk_rect[2] = (stat->bk_rect[0] = settings->x) +
settings->width;
stat->bk_rect[3] = (stat->bk_rect[1] = settings->y) +
settings->height;
// Fallthrough
case FM_DISP_LEAVE: // Don't dispose
stat->prev = *frame; // Current frame becomes underlayer
if (!stat->prev.pal) stat->prev.pal = fset->pal;
if (stat->prev_idx &&
(fset->frames[stat->prev_idx - 1].flags & FM_NUKE))
/* Remove the unref'd frame */
mem_remove_frame(fset, stat->prev_idx - 1);
stat->prev_idx = fset->cnt;
break;
case FM_DISP_RESTORE: // Dispose to previous
// Underlayer stays unchanged
break;
}
done: if ((fset->cnt > 1) && (stat->prev_idx != fset->cnt - 1) &&
(fset->frames[fset->cnt - 2].flags & FM_NUKE))
{
/* Remove the next-to-last frame */
mem_remove_frame(fset, fset->cnt - 2);
if (stat->prev_idx > fset->cnt)
stat->prev_idx = fset->cnt;
}
}
static int convert_gif_palette(png_color *pal, ColorMapObject *cmap)
{
int i, j;
if (!cmap) return (-1);
j = cmap->ColorCount;
if ((j > 256) || (j < 1)) return (-1);
for (i = 0; i < j; i++)
{
pal[i].red = cmap->Colors[i].Red;
pal[i].green = cmap->Colors[i].Green;
pal[i].blue = cmap->Colors[i].Blue;
}
return (j);
}
static int load_gif_frame(GifFileType *giffy, ls_settings *settings)
{
/* GIF interlace pattern: Y0, DY, ... */
static const unsigned char interlace[10] =
{ 0, 1, 0, 8, 4, 8, 2, 4, 1, 2 };
int i, k, kx, n, w, h, dy, res;
if (DGifGetImageDesc(giffy) == GIF_ERROR) return (-1);
/* Get local palette if any */
if (giffy->Image.ColorMap)
settings->colors = convert_gif_palette(settings->pal, giffy->Image.ColorMap);
if (settings->colors < 0) return (-1); // No palette at all
/* If palette is all we need */
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF)) return (EXPLODE_FAILED);
/* Store actual image parameters */
settings->x = giffy->Image.Left;
settings->y = giffy->Image.Top;
settings->width = w = giffy->Image.Width;
settings->height = h = giffy->Image.Height;
settings->bpp = 1;
if ((res = allocate_image(settings, CMASK_IMAGE))) return (res);
res = FILE_LIB_ERROR;
if (!settings->silent) ls_init("GIF", 0);
if (giffy->Image.Interlace) k = 2 , kx = 10;
else k = 0 , kx = 2;
for (n = 0; k < kx; k += 2)
{
dy = interlace[k + 1];
for (i = interlace[k]; i < h; n++ , i += dy)
{
if (DGifGetLine(giffy, settings->img[CHN_IMAGE] +
i * w, w) == GIF_ERROR) goto fail;
ls_progress(settings, n, 10);
}
}
res = 1;
fail: if (!settings->silent) progress_end();
return (res);
}
static int load_gif_frames(char *file_name, ani_settings *ani)
{
/* GIF disposal codes mapping */
static const unsigned short gif_disposal[8] = {
FM_DISP_LEAVE, FM_DISP_LEAVE, FM_DISP_REMOVE, FM_DISP_RESTORE,
/* Handling (reserved) "4" same as "3" is what Mozilla does */
FM_DISP_RESTORE, FM_DISP_LEAVE, FM_DISP_LEAVE, FM_DISP_LEAVE
};
GifFileType *giffy;
GifRecordType gif_rec;
GifByteType *byte_ext;
png_color w_pal[256];
ani_status stat;
image_frame *frame;
ls_settings w_set, init_set;
int res, val, disposal, bpp, cmask, lastzero = FALSE;
if (!(giffy = DGifOpenFileName(file_name, NULL))) return (-1);
/* Init state structure */
memset(&stat, 0, sizeof(stat));
stat.mode = ani->mode;
stat.defw = giffy->SWidth;
stat.defh = giffy->SHeight;
stat.global_cols = convert_gif_palette(stat.global_pal, giffy->SColorMap);
/* Init temp container */
init_set = ani->settings;
init_set.colors = 0; // Nonzero will signal local palette
init_set.pal = w_pal;
init_set.xpm_trans = -1;
init_set.gif_delay = 0;
disposal = FM_DISP_LEAVE;
/* Init frameset */
if (stat.global_cols > 0) // Set default palette
{
res = FILE_MEM_ERROR;
if (!(ani->fset.pal = malloc(SIZEOF_PALETTE))) goto fail;
mem_pal_copy(ani->fset.pal, stat.global_pal);
}
while (TRUE)
{
res = -1;
if (DGifGetRecordType(giffy, &gif_rec) == GIF_ERROR) goto fail;
if (gif_rec == TERMINATE_RECORD_TYPE) break;
else if (gif_rec == EXTENSION_RECORD_TYPE)
{
if (DGifGetExtension(giffy, &val, &byte_ext) == GIF_ERROR) goto fail;
while (byte_ext)
{
if (val == GRAPHICS_EXT_FUNC_CODE)
{
/* !!! In practice, Graphics Control Extension
* affects not only "the first block to follow"
* as docs say, but EVERY following block - WJ */
init_set.xpm_trans = byte_ext[1] & 1 ?
byte_ext[4] : -1;
init_set.gif_delay = byte_ext[2] +
(byte_ext[3] << 8);
disposal = gif_disposal[(byte_ext[1] >> 2) & 7];
}
if (DGifGetExtensionNext(giffy, &byte_ext) == GIF_ERROR) goto fail;
}
}
else if (gif_rec == IMAGE_DESC_RECORD_TYPE)
{
res = FILE_TOO_LONG;
if (!check_next_frame(&ani->fset, ani->settings.mode, TRUE))
goto fail;
w_set = init_set;
res = load_gif_frame(giffy, &w_set);
if (res != 1) goto fail;
/* Analyze how we can merge the frames */
bpp = analyze_gif_frame(&stat, &w_set);
cmask = !bpp ? CMASK_NONE : bpp > 3 ? CMASK_RGBA : CMASK_IMAGE;
/* Allocate a new frame */
// !!! Currently, frames are allocated without checking any limits
res = FILE_MEM_ERROR;
if (!mem_add_frame(&ani->fset, stat.defw, stat.defh,
bpp > 1 ? 3 : 1, cmask, stat.newpal)) goto fail;
frame = ani->fset.frames + (ani->fset.cnt - 1);
frame->cols = stat.newcols;
frame->delay = w_set.gif_delay;
frame->flags = disposal; // Pass to compositing
/* Tag zero-delay frame for deletion if requested */
if ((lastzero = (stat.mode == ANM_NOZERO) &&
!w_set.gif_delay)) frame->flags |= FM_NUKE;
if (!bpp) // Same bpp & dimensions - reassign the chanlist
{
memcpy(frame->img, w_set.img, sizeof(chanlist));
memset(w_set.img, 0, sizeof(chanlist));
}
/* Do actual compositing, remember disposal method */
composite_gif_frame(&ani->fset, &stat, &w_set);
// !!! "frame" pointer may be invalid past this point
mem_free_chanlist(w_set.img);
memset(w_set.img, 0, sizeof(chanlist));
/* Write out those frames worthy to be stored */
if ((ani->settings.mode == FS_EXPLODE_FRAMES) && !lastzero)
{
res = write_out_frame(file_name, ani, NULL);
if (res) goto fail;
}
}
}
/* Write out the final frame if not written before */
if ((ani->settings.mode == FS_EXPLODE_FRAMES) && lastzero)
{
res = write_out_frame(file_name, ani, NULL);
if (res) goto fail;
}
res = 1;
fail: mem_free_chanlist(w_set.img);
DGifCloseFile(giffy, NULL);
return (res);
}
static int load_gif(char *file_name, ls_settings *settings)
{
GifFileType *giffy;
GifRecordType gif_rec;
GifByteType *byte_ext;
int res, val, frame = 0;
int delay = settings->gif_delay, trans = -1;//, disposal = 0;
if (!(giffy = DGifOpenFileName(file_name, NULL))) return (-1);
/* Get global palette */
settings->colors = convert_gif_palette(settings->pal, giffy->SColorMap);
while (TRUE)
{
res = -1;
if (DGifGetRecordType(giffy, &gif_rec) == GIF_ERROR) goto fail;
if (gif_rec == TERMINATE_RECORD_TYPE) break;
else if (gif_rec == EXTENSION_RECORD_TYPE)
{
if (DGifGetExtension(giffy, &val, &byte_ext) == GIF_ERROR) goto fail;
while (byte_ext)
{
if (val == GRAPHICS_EXT_FUNC_CODE)
{
trans = byte_ext[1] & 1 ? byte_ext[4] : -1;
delay = byte_ext[2] + (byte_ext[3] << 8);
// disposal = (byte_ext[1] >> 2) & 7;
}
if (DGifGetExtensionNext(giffy, &byte_ext) == GIF_ERROR) goto fail;
}
}
else if (gif_rec == IMAGE_DESC_RECORD_TYPE)
{
if (frame++) /* Multipage GIF - notify user */
{
res = FILE_HAS_FRAMES;
goto fail;
}
settings->gif_delay = delay;
settings->xpm_trans = trans;
res = load_gif_frame(giffy, settings);
if (res != 1) goto fail;
}
}
res = 1;
fail: DGifCloseFile(giffy, NULL);
return (res);
}
static int save_gif(char *file_name, ls_settings *settings)
{
ColorMapObject *gif_map;
GifFileType *giffy;
unsigned char gif_ext_data[8];
int i, nc, w = settings->width, h = settings->height, msg = -1;
#ifndef WIN32
mode_t mode;
#endif
/* GIF save must be on indexed image */
if (settings->bpp != 1) return WRONG_FORMAT;
/* Get the next power of 2 for colormap size */
nc = settings->colors - 1;
nc |= nc >> 1; nc |= nc >> 2; nc |= nc >> 4;
nc += !nc + 1; // No less than 2 colors
gif_map = GifMakeMapObject(nc, NULL);
if (!gif_map) return -1;
giffy = EGifOpenFileName(file_name, FALSE, NULL);
if (!giffy) goto fail0;
for (i = 0; i < settings->colors; i++)
{
gif_map->Colors[i].Red = settings->pal[i].red;
gif_map->Colors[i].Green = settings->pal[i].green;
gif_map->Colors[i].Blue = settings->pal[i].blue;
}
for (; i < nc; i++)
{
gif_map->Colors[i].Red = gif_map->Colors[i].Green =
gif_map->Colors[i].Blue = 0;
}
if (EGifPutScreenDesc(giffy, w, h, nc, 0, gif_map) == GIF_ERROR)
goto fail;
if (settings->xpm_trans >= 0)
{
gif_ext_data[0] = 1;
gif_ext_data[1] = 0;
gif_ext_data[2] = 0;
gif_ext_data[3] = settings->xpm_trans;
EGifPutExtension(giffy, GRAPHICS_EXT_FUNC_CODE, 4, gif_ext_data);
}
if (EGifPutImageDesc(giffy, 0, 0, w, h, FALSE, NULL) == GIF_ERROR)
goto fail;
if (!settings->silent) ls_init("GIF", 1);
for (i = 0; i < h; i++)
{
EGifPutLine(giffy, settings->img[CHN_IMAGE] + i * w, w);
ls_progress(settings, i, 20);
}
if (!settings->silent) progress_end();
msg = 0;
fail: EGifCloseFile(giffy, NULL);
#ifndef WIN32
/* giflib creates files with 0600 permissions, which is nasty - WJ */
mode = umask(0022);
umask(mode);
chmod(file_name, 0666 & ~mode);
#endif
fail0: GifFreeMapObject(gif_map);
return (msg);
}
#endif
#ifdef NEED_CMYK
#ifdef U_LCMS
/* Guard against cmsHTRANSFORM changing into something overlong in the future */
typedef char cmsHTRANSFORM_Does_Not_Fit_Into_Pointer[2 * (sizeof(cmsHTRANSFORM) <= sizeof(char *)) - 1];
static int init_cmyk2rgb(ls_settings *settings, unsigned char *icc, int len,
int inverted)
{
cmsHPROFILE from, to;
cmsHTRANSFORM how = NULL;
from = cmsOpenProfileFromMem((void *)icc, len);
if (!from) return (TRUE); // Unopenable now, unopenable ever
to = cmsCreate_sRGBProfile();
if (cmsGetColorSpace(from) == icSigCmykData)
how = cmsCreateTransform(from, inverted ? TYPE_CMYK_8_REV :
TYPE_CMYK_8, to, TYPE_RGB_8, INTENT_PERCEPTUAL, 0);
if (from) cmsCloseProfile(from);
cmsCloseProfile(to);
if (!how) return (FALSE); // Better luck the next time
settings->icc = (char *)how;
settings->icc_size = -2;
return (TRUE);
}
static void done_cmyk2rgb(ls_settings *settings)
{
if (settings->icc_size != -2) return;
cmsDeleteTransform((cmsHTRANSFORM)settings->icc);
settings->icc = NULL;
settings->icc_size = -1; // Not need profiles anymore
}
#else /* No LCMS */
#define done_cmyk2rgb(X)
#endif
static void cmyk2rgb(unsigned char *dest, unsigned char *src, int cnt,
int inverted, ls_settings *settings)
{
unsigned char xb;
int j, k, r, g, b;
#ifdef U_LCMS
/* Convert CMYK to RGB using LCMS if possible */
if (settings->icc_size == -2)
{
cmsDoTransform((cmsHTRANSFORM)settings->icc, src, dest, cnt);
return;
}
#endif
/* Simple CMYK->RGB conversion */
xb = inverted ? 0 : 255;
for (j = 0; j < cnt; j++ , src += 4 , dest += 3)
{
k = src[3] ^ xb;
r = (src[0] ^ xb) * k;
dest[0] = (r + (r >> 8) + 1) >> 8;
g = (src[1] ^ xb) * k;
dest[1] = (g + (g >> 8) + 1) >> 8;
b = (src[2] ^ xb) * k;
dest[2] = (b + (b >> 8) + 1) >> 8;
}
}
#endif
#ifdef U_JPEG
struct my_error_mgr
{
struct jpeg_error_mgr pub; // "public" fields
jmp_buf setjmp_buffer; // for return to caller
};
typedef struct my_error_mgr *my_error_ptr;
METHODDEF(void) my_error_exit (j_common_ptr cinfo)
{
my_error_ptr myerr = (my_error_ptr) cinfo->err;
longjmp(myerr->setjmp_buffer, 1);
}
struct my_error_mgr jerr;
static int load_jpeg(char *file_name, ls_settings *settings)
{
static int pr;
struct jpeg_decompress_struct cinfo;
unsigned char *memp, *memx = NULL;
FILE *fp;
int i, width, height, bpp, res = -1, inv = 0;
#ifdef U_LCMS
unsigned char *icc = NULL;
#endif
if ((fp = fopen(file_name, "rb")) == NULL) return (-1);
pr = 0;
jpeg_create_decompress(&cinfo);
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (setjmp(jerr.setjmp_buffer))
{
res = FILE_LIB_ERROR;
goto fail;
}
jpeg_stdio_src(&cinfo, fp);
#ifdef U_LCMS
/* Request ICC profile aka APP2 data be preserved */
if (!settings->icc_size)
jpeg_save_markers(&cinfo, JPEG_APP0 + 2, 0xFFFF);
#endif
jpeg_read_header(&cinfo, TRUE);
jpeg_start_decompress(&cinfo);
bpp = 3;
switch (cinfo.out_color_space)
{
case JCS_RGB: break;
case JCS_GRAYSCALE:
set_gray(settings);
bpp = 1;
break;
case JCS_CMYK:
/* Photoshop writes CMYK data inverted */
inv = cinfo.saw_Adobe_marker;
if ((memx = malloc(cinfo.output_width * 4))) break;
res = FILE_MEM_ERROR;
// Fallthrough
default: goto fail; /* Unsupported colorspace */
}
settings->width = width = cinfo.output_width;
settings->height = height = cinfo.output_height;
settings->bpp = bpp;
if ((res = allocate_image(settings, CMASK_IMAGE))) goto fail;
res = -1;
pr = !settings->silent;
#ifdef U_LCMS
#define PARTHDR 14
while (!settings->icc_size)
{
jpeg_saved_marker_ptr mk;
unsigned char *tmp, *parts[256];
int i, part, nparts = -1, icclen = 0, lparts[256];
/* List parts */
memset(parts, 0, sizeof(parts));
for (mk = cinfo.marker_list; mk; mk = mk->next)
{
if ((mk->marker != JPEG_APP0 + 2) ||
(mk->data_length < PARTHDR) ||
strcmp(mk->data, "ICC_PROFILE")) continue;
part = GETJOCTET(mk->data[13]);
if (nparts < 0) nparts = part;
if (nparts != part) break;
part = GETJOCTET(mk->data[12]);
if (!part-- || (part >= nparts) || parts[part]) break;
parts[part] = (unsigned char *)(mk->data + PARTHDR);
icclen += lparts[part] = mk->data_length - PARTHDR;
}
if (nparts < 0) break;
icc = tmp = malloc(icclen);
if (!icc) break;
/* Assemble parts */
for (i = 0; i < nparts; i++)
{
if (!parts[i]) break;
memcpy(tmp, parts[i], lparts[i]);
tmp += lparts[i];
}
if (i < nparts) break; // Sequence had a hole
/* If profile is needed right now, for CMYK->RGB */
if (memx && init_cmyk2rgb(settings, icc, icclen, inv))
break; // Transform is ready, so drop the profile
settings->icc = icc;
settings->icc_size = icclen;
icc = NULL; // Leave the profile be
break;
}
free(icc);
#undef PARTHDR
#endif
if (pr) ls_init("JPEG", 0);
for (i = 0; i < height; i++)
{
memp = settings->img[CHN_IMAGE] + width * i * bpp;
jpeg_read_scanlines(&cinfo, memx ? &memx : &memp, 1);
if (memx) cmyk2rgb(memp, memx, width, inv, settings);
ls_progress(settings, i, 20);
}
done_cmyk2rgb(settings);
jpeg_finish_decompress(&cinfo);
res = 1;
fail: if (pr) progress_end();
jpeg_destroy_decompress(&cinfo);
fclose(fp);
free(memx);
return (res);
}
static int save_jpeg(char *file_name, ls_settings *settings)
{
struct jpeg_compress_struct cinfo;
JSAMPROW row_pointer;
FILE *fp;
int i;
if (settings->bpp == 1) return WRONG_FORMAT;
if ((fp = fopen(file_name, "wb")) == NULL) return -1;
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (setjmp(jerr.setjmp_buffer))
{
jpeg_destroy_compress(&cinfo);
fclose(fp);
return -1;
}
jpeg_create_compress(&cinfo);
jpeg_stdio_dest( &cinfo, fp );
cinfo.image_width = settings->width;
cinfo.image_height = settings->height;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, settings->jpeg_quality, TRUE );
jpeg_start_compress( &cinfo, TRUE );
row_pointer = settings->img[CHN_IMAGE];
if (!settings->silent) ls_init("JPEG", 1);
for (i = 0; i < settings->height; i++ )
{
jpeg_write_scanlines(&cinfo, &row_pointer, 1);
row_pointer += 3 * settings->width;
ls_progress(settings, i, 20);
}
jpeg_finish_compress( &cinfo );
if (!settings->silent) progress_end();
jpeg_destroy_compress( &cinfo );
fclose(fp);
return 0;
}
#endif
#ifdef U_JP2
/* *** PREFACE ***
* OpenJPEG 1.x is wasteful in the extreme, with memory overhead of about
* 7 times the unpacked image size. So it can fail to handle even such
* resolutions that fit into available memory with lots of room to spare.
* Still, JasPer is an even worse memory hog, if a somewhat faster one.
* Another thing - Linux builds of OpenJPEG cannot properly encode an opacity
* channel (fixed in SVN on 06.11.09, revision 541)
* And JP2 images with 4 channels, produced by OpenJPEG, cause JasPer
* to die horribly - WJ */
static void stupid_callback(const char *msg, void *client_data)
{
}
static int load_jpeg2000(char *file_name, ls_settings *settings)
{
opj_dparameters_t par;
opj_dinfo_t *dinfo;
opj_cio_t *cio = NULL;
opj_image_t *image = NULL;
opj_image_comp_t *comp;
opj_event_mgr_t useless_events; // !!! Silently made mandatory in v1.2
unsigned char xtb[256], *dest, *buf = NULL;
FILE *fp;
int i, j, k, l, w, h, w0, nc, pr, step, delta, shift;
int *src, cmask = CMASK_IMAGE, codec = CODEC_JP2, res;
if ((fp = fopen(file_name, "rb")) == NULL) return (-1);
/* Read in the entire file */
fseek(fp, 0, SEEK_END);
l = ftell(fp);
fseek(fp, 0, SEEK_SET);
buf = malloc(l);
res = FILE_MEM_ERROR;
if (!buf) goto ffail;
res = -1;
i = fread(buf, 1, l, fp);
if (i < l) goto ffail;
fclose(fp);
if ((buf[0] == 0xFF) && (buf[1] == 0x4F)) codec = CODEC_J2K;
/* Decompress it */
dinfo = opj_create_decompress(codec);
if (!dinfo) goto lfail;
memset(&useless_events, 0, sizeof(useless_events));
useless_events.error_handler = useless_events.warning_handler =
useless_events.info_handler = stupid_callback;
opj_set_event_mgr((opj_common_ptr)dinfo, &useless_events, stderr);
opj_set_default_decoder_parameters(&par);
opj_setup_decoder(dinfo, &par);
cio = opj_cio_open((opj_common_ptr)dinfo, buf, l);
if (!cio) goto lfail;
if ((pr = !settings->silent)) ls_init("JPEG2000", 0);
image = opj_decode(dinfo, cio);
opj_cio_close(cio);
opj_destroy_decompress(dinfo);
free(buf);
if (!image) goto ifail;
/* Analyze what we got */
// !!! OpenJPEG 1.1.1 does *NOT* properly set image->color_space !!!
if (image->numcomps < 3) /* Guess this is paletted */
{
set_gray(settings);
settings->bpp = 1;
}
else settings->bpp = 3;
if ((nc = settings->bpp) < image->numcomps) nc++ , cmask = CMASK_RGBA;
comp = image->comps;
settings->width = w = (comp->w + (1 << comp->factor) - 1) >> comp->factor;
settings->height = h = (comp->h + (1 << comp->factor) - 1) >> comp->factor;
for (i = 1; i < nc; i++) /* Check if all components are the same size */
{
comp++;
if ((w != (comp->w + (1 << comp->factor) - 1) >> comp->factor) ||
(h != (comp->h + (1 << comp->factor) - 1) >> comp->factor))
goto ifail;
}
if ((res = allocate_image(settings, cmask))) goto ifail;
/* Unpack data */
for (i = 0 , comp = image->comps; i < nc; i++ , comp++)
{
if (i < settings->bpp) /* Image */
{
dest = settings->img[CHN_IMAGE] + i;
step = settings->bpp;
}
else /* Alpha */
{
dest = settings->img[CHN_ALPHA];
if (!dest) break; /* No alpha allocated */
step = 1;
}
w0 = comp->w;
delta = comp->sgnd ? 1 << (comp->prec - 1) : 0;
shift = comp->prec > 8 ? comp->prec - 8 : 0;
set_xlate(xtb, comp->prec - shift);
for (j = 0; j < h; j++)
{
src = comp->data + j * w0;
for (k = 0; k < w; k++)
{
*dest = xtb[(src[k] + delta) >> shift];
dest += step;
}
}
}
res = 1;
ifail: if (pr) progress_end();
opj_image_destroy(image);
return (res);
lfail: opj_destroy_decompress(dinfo);
free(buf);
return (res);
ffail: free(buf);
fclose(fp);
return (res);
}
static int save_jpeg2000(char *file_name, ls_settings *settings)
{
opj_cparameters_t par;
opj_cinfo_t *cinfo;
opj_image_cmptparm_t channels[4];
opj_cio_t *cio = NULL;
opj_image_t *image;
opj_event_mgr_t useless_events; // !!! Silently made mandatory in v1.2
unsigned char *src;
FILE *fp;
int i, j, k, nc, step;
int *dest, w = settings->width, h = settings->height, res = -1;
if (settings->bpp == 1) return WRONG_FORMAT;
if ((fp = fopen(file_name, "wb")) == NULL) return -1;
/* Create intermediate structure */
nc = settings->img[CHN_ALPHA] ? 4 : 3;
memset(channels, 0, sizeof(channels));
for (i = 0; i < nc; i++)
{
channels[i].prec = channels[i].bpp = 8;
channels[i].dx = channels[i].dy = 1;
channels[i].w = settings->width;
channels[i].h = settings->height;
}
image = opj_image_create(nc, channels, CLRSPC_SRGB);
if (!image) goto ffail;
image->x0 = image->y0 = 0;
image->x1 = w; image->y1 = h;
/* Fill it */
if (!settings->silent) ls_init("JPEG2000", 1);
k = w * h;
for (i = 0; i < nc; i++)
{
if (i < 3)
{
src = settings->img[CHN_IMAGE] + i;
step = 3;
}
else
{
src = settings->img[CHN_ALPHA];
step = 1;
}
dest = image->comps[i].data;
for (j = 0; j < k; j++ , src += step) dest[j] = *src;
}
/* Compress it */
cinfo = opj_create_compress(settings->ftype == FT_JP2 ? CODEC_JP2 : CODEC_J2K);
if (!cinfo) goto fail;
memset(&useless_events, 0, sizeof(useless_events));
useless_events.error_handler = useless_events.warning_handler =
useless_events.info_handler = stupid_callback;
opj_set_event_mgr((opj_common_ptr)cinfo, &useless_events, stderr);
opj_set_default_encoder_parameters(&par);
par.tcp_numlayers = 1;
par.tcp_rates[0] = settings->jp2_rate;
par.cp_disto_alloc = 1;
opj_setup_encoder(cinfo, &par, image);
cio = opj_cio_open((opj_common_ptr)cinfo, NULL, 0);
if (!cio) goto fail;
if (!opj_encode(cinfo, cio, image, NULL)) goto fail;
/* Write it */
k = cio_tell(cio);
if (fwrite(cio->buffer, 1, k, fp) == k) res = 0;
fail: if (cio) opj_cio_close(cio);
opj_destroy_compress(cinfo);
opj_image_destroy(image);
if (!settings->silent) progress_end();
ffail: fclose(fp);
return (res);
}
#endif
#ifdef U_JASPER
/* *** PREFACE ***
* JasPer is QUITE a memory waster, with peak memory usage nearly TEN times the
* unpacked image size. But what is worse, its API is 99% undocumented.
* And to add insult to injury, it reacts to some invalid JP2 files (4-channel
* ones written by OpenJPEG) by abort()ing, instead of returning error - WJ */
static int jasper_init;
static int load_jpeg2000(char *file_name, ls_settings *settings)
{
jas_image_t *img;
jas_stream_t *inp;
jas_matrix_t *mx;
jas_seqent_t *src;
char *fmt;
unsigned char xtb[256], *dest;
int nc, cspace, mode, slots[4];
int bits, shift, delta, chan, step;
int i, j, k, n, nx, w, h, bpp, pr = 0, res = -1;
/* Init the dumb library */
if (!jasper_init) jas_init();
jasper_init = TRUE;
/* Open the file */
inp = jas_stream_fopen(file_name, "rb");
if (!inp) return (-1);
/* Validate format */
fmt = jas_image_fmttostr(jas_image_getfmt(inp));
if (!fmt || strcmp(fmt, settings->ftype == FT_JP2 ? "jp2" : "jpc"))
goto ffail;
/* Decode the file into a halfbaked pile of bytes */
if ((pr = !settings->silent)) ls_init("JPEG2000", 0);
img = jas_image_decode(inp, -1, NULL);
jas_stream_close(inp);
if (!img) goto dfail;
/* Analyze the pile's contents */
nc = jas_image_numcmpts(img);
mode = jas_clrspc_fam(cspace = jas_image_clrspc(img));
if (mode == JAS_CLRSPC_FAM_GRAY) bpp = 1;
else if (mode == JAS_CLRSPC_FAM_RGB) bpp = 3;
else goto ifail;
if (bpp == 3)
{
slots[0] = jas_image_getcmptbytype(img,
JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_R));
slots[1] = jas_image_getcmptbytype(img,
JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_G));
slots[2] = jas_image_getcmptbytype(img,
JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_B));
if ((slots[1] < 0) | (slots[2] < 0)) goto ifail;
}
else
{
slots[0] = jas_image_getcmptbytype(img,
JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_GRAY_Y));
set_gray(settings);
}
if (slots[0] < 0) goto ifail;
if (nc > bpp)
{
slots[bpp] = jas_image_getcmptbytype(img, JAS_IMAGE_CT_OPACITY);
/* !!! JasPer has a bug - it doesn't write out component definitions if color
* channels are in natural order, thus losing the types of any extra components.
* (See where variable "needcdef" in src/libjasper/jp2/jp2_enc.c gets unset.)
* Then on reading, type will be replaced by component's ordinal number - WJ */
if (slots[bpp] < 0) slots[bpp] = jas_image_getcmptbytype(img, bpp);
/* Use an unlabeled extra component for alpha if no labeled one */
if (slots[bpp] < 0)
slots[bpp] = jas_image_getcmptbytype(img, JAS_IMAGE_CT_UNKNOWN);
nc = bpp + (slots[bpp] >= 0); // Ignore extra channels if no alpha
}
w = jas_image_cmptwidth(img, slots[0]);
h = jas_image_cmptheight(img, slots[0]);
for (i = 1; i < nc; i++) /* Check if all components are the same size */
{
if ((jas_image_cmptwidth(img, slots[i]) != w) ||
(jas_image_cmptheight(img, slots[i]) != h)) goto ifail;
}
/* Allocate "matrix" */
res = FILE_MEM_ERROR;
mx = jas_matrix_create(1, w);
if (!mx) goto ifail;
/* Allocate image */
settings->width = w;
settings->height = h;
settings->bpp = bpp;
if ((res = allocate_image(settings, nc > bpp ? CMASK_RGBA : CMASK_IMAGE)))
goto mfail;
if (!settings->img[CHN_ALPHA]) nc = bpp;
res = 1;
#if U_LCMS
/* JasPer implements CMS internally, but without lcms, it makes no sense
* to provide all the interface stuff for this one rare format - WJ */
while (!settings->icc_size && (bpp == 3) && (cspace != JAS_CLRSPC_SRGB))
{
jas_cmprof_t *prof;
jas_image_t *timg;
res = FILE_LIB_ERROR;
prof = jas_cmprof_createfromclrspc(JAS_CLRSPC_SRGB);
if (!prof) break;
timg = jas_image_chclrspc(img, prof, JAS_CMXFORM_INTENT_PER);
jas_cmprof_destroy(prof);
if (!timg) break;
jas_image_destroy(img);
img = timg;
res = 1; // Success - further code is fail-proof
break;
}
#endif
/* Unravel the ugly thing into proper format */
nx = h * nc;
for (i = n = 0; i < nc; i++)
{
if (i < bpp) /* Image */
{
dest = settings->img[CHN_IMAGE] + i;
step = settings->bpp;
}
else /* Alpha */
{
dest = settings->img[CHN_ALPHA];
step = 1;
}
chan = slots[i];
bits = jas_image_cmptprec(img, chan);
delta = jas_image_cmptsgnd(img, chan) ? 1 << (bits - 1) : 0;
shift = bits > 8 ? bits - 8 : 0;
set_xlate(xtb, bits - shift);
for (j = 0; j < h; j++ , n++)
{
jas_image_readcmpt(img, chan, 0, j, w, 1, mx);
src = jas_matrix_getref(mx, 0, 0);
for (k = 0; k < w; k++)
{
*dest = xtb[(unsigned)(src[k] + delta) >> shift];
dest += step;
}
if (pr && ((n * 10) % nx >= nx - 10))
progress_update((float)n / nx);
}
}
mfail: jas_matrix_destroy(mx);
ifail: jas_image_destroy(img);
dfail: if (pr) progress_end();
return (res);
ffail: jas_stream_close(inp);
return (-1);
}
static int save_jpeg2000(char *file_name, ls_settings *settings)
{
static const jas_image_cmpttype_t chans[4] = {
JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_R),
JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_G),
JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_B),
JAS_IMAGE_CT_OPACITY };
jas_image_cmptparm_t cp[4];
jas_image_t *img;
jas_stream_t *outp;
jas_matrix_t *mx;
jas_seqent_t *dest;
char buf[256], *opts = NULL;
unsigned char *src;
int w = settings->width, h = settings->height, res = -1;
int i, j, k, n, nx, nc, step, pr;
if (settings->bpp == 1) return WRONG_FORMAT;
/* Init the dumb library */
if (!jasper_init) jas_init();
jasper_init = TRUE;
/* Open the file */
outp = jas_stream_fopen(file_name, "wb");
if (!outp) return (-1);
/* Setup component parameters */
memset(cp, 0, sizeof(cp)); // Zero out all that needs zeroing
cp[0].hstep = cp[0].vstep = 1;
cp[0].width = w; cp[0].height = h;
cp[0].prec = 8;
cp[3] = cp[2] = cp[1] = cp[0];
/* Create image structure */
nc = 3 + !!settings->img[CHN_ALPHA];
img = jas_image_create(nc, cp, JAS_CLRSPC_SRGB);
if (!img) goto fail;
/* Allocate "matrix" */
mx = jas_matrix_create(1, w);
if (!mx) goto fail2;
if ((pr = !settings->silent)) ls_init("JPEG2000", 1);
/* Fill image structure */
nx = h * nc;
nx += nx / 10 + 1; // Show "90% done" while compressing
for (i = n = 0; i < nc; i++)
{
/* !!! The only workaround for JasPer losing extra components' types on
* write is to reorder the RGB components - but then, dumb readers, such
* as ones in Mozilla and GTK+, would read them in wrong order - WJ */
jas_image_setcmpttype(img, i, chans[i]);
if (i < 3) /* Image */
{
src = settings->img[CHN_IMAGE] + i;
step = settings->bpp;
}
else /* Alpha */
{
src = settings->img[CHN_ALPHA];
step = 1;
}
for (j = 0; j < h; j++ , n++)
{
dest = jas_matrix_getref(mx, 0, 0);
for (k = 0; k < w; k++)
{
dest[k] = *src;
src += step;
}
jas_image_writecmpt(img, i, 0, j, w, 1, mx);
if (pr && ((n * 10) % nx >= nx - 10))
if (progress_update((float)n / nx)) goto fail3;
}
}
/* Compress it */
if (pr) progress_update(0.9);
if (settings->jp2_rate) // Lossless if NO "rate" option passed
sprintf(opts = buf, "rate=%g", 1.0 / settings->jp2_rate);
if (!jas_image_encode(img, outp, jas_image_strtofmt(
settings->ftype == FT_JP2 ? "jp2" : "jpc"), opts)) res = 0;
jas_stream_flush(outp);
if (pr) progress_update(1.0);
fail3: if (pr) progress_end();
jas_matrix_destroy(mx);
fail2: jas_image_destroy(img);
fail: jas_stream_close(outp);
return (res);
}
#endif
/* Slow-but-sure universal bitstream parsers; may read extra byte at the end */
static void stream_MSB(unsigned char *src, unsigned char *dest, int cnt,
int bits, int bit0, int bitstep, int step)
{
int i, j, v, mask = (1 << bits) - 1;
for (i = 0; i < cnt; i++)
{
j = bit0 >> 3;
v = (src[j] << 8) | src[j + 1];
v >>= 16 - bits - (bit0 & 7);
*dest = (unsigned char)(v & mask);
bit0 += bitstep;
dest += step;
}
}
static void stream_LSB(unsigned char *src, unsigned char *dest, int cnt,
int bits, int bit0, int bitstep, int step)
{
int i, j, v, mask = (1 << bits) - 1;
for (i = 0; i < cnt; i++)
{
j = bit0 >> 3;
v = (src[j + 1] << 8) | src[j];
v >>= bit0 & 7;
*dest = (unsigned char)(v & mask);
bit0 += bitstep;
dest += step;
}
}
#ifdef U_TIFF
/* *** PREFACE ***
* TIFF is a bitch, and libtiff is a joke. An unstable and buggy joke, at that.
* It's a fact of life - and when some TIFFs don't load or are mangled, that
* also is a fact of life. Installing latest libtiff may help - or not; sending
* a bugreport with the offending file attached may help too - but again, it's
* not guaranteed. But the common varieties of TIFF format should load OK. */
static int load_tiff_frame(TIFF *tif, ls_settings *settings)
{
char cbuf[1024];
uint16 bpsamp, sampp, xsamp, pmetric, planar, orient, sform;
uint16 *sampinfo, *red16, *green16, *blue16;
uint32 width, height, tw = 0, th = 0, rps = 0;
uint32 *tr, *raster = NULL;
unsigned char *tmp, *buf = NULL;
int bpp = 3, cmask = CMASK_IMAGE, argb = FALSE, pr = FALSE;
int i, j, mirror, res;
/* Let's learn what we've got */
TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &sampp);
TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES, &xsamp, &sampinfo);
if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &pmetric))
{
/* Defaults like in libtiff */
if (sampp - xsamp == 1) pmetric = PHOTOMETRIC_MINISBLACK;
else if (sampp - xsamp == 3) pmetric = PHOTOMETRIC_RGB;
else return (-1);
}
TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLEFORMAT, &sform);
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);
TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bpsamp);
TIFFGetFieldDefaulted(tif, TIFFTAG_PLANARCONFIG, &planar);
planar = planar != PLANARCONFIG_CONTIG;
TIFFGetFieldDefaulted(tif, TIFFTAG_ORIENTATION, &orient);
switch (orient)
{
case ORIENTATION_TOPLEFT:
case ORIENTATION_LEFTTOP: mirror = 0; break;
case ORIENTATION_TOPRIGHT:
case ORIENTATION_RIGHTTOP: mirror = 1; break;
default:
case ORIENTATION_BOTLEFT:
case ORIENTATION_LEFTBOT: mirror = 2; break;
case ORIENTATION_BOTRIGHT:
case ORIENTATION_RIGHTBOT: mirror = 3; break;
}
if (TIFFIsTiled(tif))
{
TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw);
TIFFGetField(tif, TIFFTAG_TILELENGTH, &th);
}
else
{
TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rps);
}
/* Extract position from it */
settings->x = settings->y = 0;
while (TRUE)
{
float xres, yres, dxu = 0, dyu = 0;
if (!TIFFGetField(tif, TIFFTAG_XPOSITION, &dxu) &&
!TIFFGetField(tif, TIFFTAG_YPOSITION, &dyu)) break;
// Have position, now need resolution
if (!TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres)) break;
// X resolution we have, what about Y?
yres = xres; // Default
TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres);
// Convert ResolutionUnits (whatever they are) to pixels
settings->x = rint(dxu * xres);
settings->y = rint(dyu * yres);
break;
}
/* Let's decide how to store it */
if ((width > MAX_WIDTH) || (height > MAX_HEIGHT)) return (-1);
settings->width = width;
settings->height = height;
if ((sform != SAMPLEFORMAT_UINT) && (sform != SAMPLEFORMAT_INT) &&
(sform != SAMPLEFORMAT_VOID)) argb = TRUE;
else switch (pmetric)
{
case PHOTOMETRIC_PALETTE:
{
png_color *cp = settings->pal;
int i, j, k, na = 0, nd = 1; /* Old palette format */
if (bpsamp > 8)
{
argb = TRUE;
break;
}
if (!TIFFGetField(tif, TIFFTAG_COLORMAP,
&red16, &green16, &blue16)) return (-1);
settings->colors = j = 1 << bpsamp;
/* Analyze palette */
for (k = i = 0; i < j; i++)
{
k |= red16[i] | green16[i] | blue16[i];
}
if (k > 255) na = 128 , nd = 257; /* New palette format */
for (i = 0; i < j; i++ , cp++)
{
cp->red = (red16[i] + na) / nd;
cp->green = (green16[i] + na) / nd;
cp->blue = (blue16[i] + na) / nd;
}
/* If palette is all we need */
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF))
return (EXPLODE_FAILED);
/* Fallthrough */
}
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
bpp = 1; break;
case PHOTOMETRIC_RGB:
break;
case PHOTOMETRIC_SEPARATED:
/* Leave non-CMYK separations to libtiff */
if (sampp - xsamp == 4) break;
default:
argb = TRUE;
}
/* libtiff can't handle this and neither can we */
if (argb && !TIFFRGBAImageOK(tif, cbuf)) return (-1);
settings->bpp = bpp;
/* Photoshop writes alpha as EXTRASAMPLE_UNSPECIFIED anyway */
if (xsamp) cmask = CMASK_RGBA;
/* !!! No alpha support for RGB mode yet */
if (argb) cmask = CMASK_IMAGE;
if ((res = allocate_image(settings, cmask))) return (res);
res = -1;
#ifdef U_LCMS
#ifdef TIFFTAG_ICCPROFILE
/* Extract ICC profile if it's of use */
if (!settings->icc_size)
{
uint32 size;
unsigned char *data;
/* TIFFTAG_ICCPROFILE was broken beyond hope in libtiff 3.8.0
* (see libtiff 3.8.1+ changelog entry for 2006-01-04) */
if (!strstr(TIFFGetVersion(), " 3.8.0") &&
TIFFGetField(tif, TIFFTAG_ICCPROFILE, &size, &data) &&
(size < INT_MAX) &&
/* If profile is needed right now, for CMYK->RGB */
!((pmetric == PHOTOMETRIC_SEPARATED) && !argb &&
init_cmyk2rgb(settings, data, size, FALSE)) &&
(settings->icc = malloc(size)))
{
settings->icc_size = size;
memcpy(settings->icc, data, size);
}
}
#endif
#endif
if ((pr = !settings->silent)) ls_init("TIFF", 0);
/* Read it as ARGB if can't understand it ourselves */
if (argb)
{
/* libtiff is too much of a moving target if finer control is
* needed, so let's trade memory for stability */
raster = (uint32 *)_TIFFmalloc(width * height * sizeof(uint32));
res = FILE_MEM_ERROR;
if (!raster) goto fail2;
res = FILE_LIB_ERROR;
if (!TIFFReadRGBAImage(tif, width, height, raster, 0)) goto fail2;
res = -1;
/* Parse the RGB part only - alpha might be eaten by bugs */
tr = raster;
for (i = height - 1; i >= 0; i--)
{
tmp = settings->img[CHN_IMAGE] + width * i * bpp;
for (j = 0; j < width; j++)
{
tmp[0] = TIFFGetR(tr[j]);
tmp[1] = TIFFGetG(tr[j]);
tmp[2] = TIFFGetB(tr[j]);
tmp += 3;
}
tr += width;
ls_progress(settings, height - i, 10);
}
_TIFFfree(raster);
raster = NULL;
/* !!! Now it would be good to read in alpha ourselves - but not yet... */
res = 1;
}
/* Read & interpret it ourselves */
else
{
unsigned char xtable[256], *src, *tbuf = NULL;
int xstep = tw ? tw : width, ystep = th ? th : rps;
int aalpha, tsz = 0, wbpp = bpp;
int bpr, bits1, bit0, db, n, nx;
int j, k, x0, y0, bsz, plane, nplanes;
if (pmetric == PHOTOMETRIC_SEPARATED) // Needs temp buffer
tsz = xstep * ystep * (wbpp = 4);
nplanes = planar ? wbpp + !!settings->img[CHN_ALPHA] : 1;
bsz = (tw ? TIFFTileSize(tif) : TIFFStripSize(tif)) + 1;
bpr = tw ? TIFFTileRowSize(tif) : TIFFScanlineSize(tif);
buf = _TIFFmalloc(bsz + tsz);
res = FILE_MEM_ERROR;
if (!buf) goto fail2;
res = FILE_LIB_ERROR;
if (tsz) tbuf = buf + bsz; // Temp buffer for CMYK->RGB
/* Flag associated alpha */
aalpha = settings->img[CHN_ALPHA] &&
(pmetric != PHOTOMETRIC_PALETTE) &&
(sampinfo[0] == EXTRASAMPLE_ASSOCALPHA);
bits1 = bpsamp > 8 ? 8 : bpsamp;
/* Setup greyscale palette */
if ((bpp == 1) && (pmetric != PHOTOMETRIC_PALETTE))
{
/* Demultiplied values are 0..255 */
j = aalpha ? 256 : 1 << bits1;
settings->colors = j--;
k = pmetric == PHOTOMETRIC_MINISBLACK ? 0 : j;
mem_bw_pal(settings->pal, k, j ^ k);
}
/* !!! Assume 16-, 32- and 64-bit data follow machine's
* endianness, and everything else is packed big-endian way -
* like TIFF 6.0 spec says; but TIFF 5.0 and before specs said
* differently, so let's wait for examples to see if I'm right
* or not; as for 24- and 128-bit, even different libtiff
* versions handle them differently, so I leave them alone
* for now - WJ */
bit0 = (G_BYTE_ORDER == G_LITTLE_ENDIAN) &&
((bpsamp == 16) || (bpsamp == 32) ||
(bpsamp == 64)) ? bpsamp - 8 : 0;
db = (planar ? 1 : sampp) * bpsamp;
/* Prepare to rescale what we've got */
memset(xtable, 0, 256);
set_xlate(xtable, bits1);
/* Progress steps */
nx = ((width + xstep - 1) / xstep) * nplanes * height;
/* Read image tile by tile - considering strip a wide tile */
for (n = y0 = 0; y0 < height; y0 += ystep)
for (x0 = 0; x0 < width; x0 += xstep)
for (plane = 0; plane < nplanes; plane++)
{
unsigned char *tmp, *tmpa;
int i, j, k, x, y, w, h, dx, dxa, dy, dys;
/* Read one piece */
if (tw)
{
if (TIFFReadTile(tif, buf, x0, y0, 0, plane) < 0)
goto fail2;
}
else
{
if (TIFFReadEncodedStrip(tif,
TIFFComputeStrip(tif, y0, plane),
buf, bsz) < 0) goto fail2;
}
/* Prepare decoding loops */
if (mirror & 1) /* X mirror */
{
x = width - x0;
w = x < xstep ? x : xstep;
x -= w;
}
else
{
x = x0;
w = x + xstep > width ? width - x : xstep;
}
if (mirror & 2) /* Y mirror */
{
y = height - y0;
h = y < ystep ? y : ystep;
y -= h;
}
else
{
y = y0;
h = y + ystep > height ? height - y : ystep;
}
/* Prepare pointers */
dx = dxa = 1; dy = width;
i = y * width + x;
tmp = tmpa = settings->img[CHN_ALPHA] + i;
if (plane >= wbpp); // Alpha
else if (tbuf) // CMYK
{
dx = 4; dy = w;
tmp = tbuf + plane;
}
else // RGB/indexed
{
dx = bpp;
tmp = settings->img[CHN_IMAGE] + plane + i * bpp;
}
dy *= dx; dys = bpr;
src = buf;
/* Account for horizontal mirroring */
if (mirror & 1)
{
// Write bytes backward
tmp += (w - 1) * dx; tmpa += w - 1;
dx = -dx; dxa = -1;
}
/* Account for vertical mirroring */
if (mirror & 2)
{
// Read rows backward
src += (h - 1) * dys;
dys = -dys;
}
/* Decode it */
for (j = 0; j < h; j++ , n++ , src += dys , tmp += dy)
{
if (pr && ((n * 10) % nx >= nx - 10))
progress_update((float)n / nx);
stream_MSB(src, tmp, w, bits1, bit0, db, dx);
if (planar) continue;
for (k = 1; k < wbpp; k++)
{
stream_MSB(src, tmp + k, w, bits1,
bit0 + bpsamp * k, db, dx);
}
if (settings->img[CHN_ALPHA])
{
stream_MSB(src, tmpa, w, bits1,
bit0 + bpsamp * wbpp, db, dxa);
tmpa += width;
}
}
/* Convert CMYK to RGB if needed */
if (!tbuf || (planar && (plane != 3))) continue;
if (bits1 < 8) // Rescale to 8-bit
do_xlate(xtable, tbuf, w * h * 4);
cmyk2rgb(tbuf, tbuf, w * h, FALSE, settings);
src = tbuf;
tmp = settings->img[CHN_IMAGE] + (y * width + x) * 3;
w *= 3;
for (i = 0; i < h; i++ , tmp += width * 3 , src += w)
memcpy(tmp, src, w);
}
done_cmyk2rgb(settings);
j = width * height;
tmp = settings->img[CHN_IMAGE];
src = settings->img[CHN_ALPHA];
/* Unassociate alpha */
if (aalpha)
{
if (wbpp > 3) // Converted from CMYK
{
unsigned char *img = tmp;
int i, k, a;
if (bits1 < 8) do_xlate(xtable, src, j);
bits1 = 8; // No further rescaling needed
/* Remove white background */
for (i = 0; i < j; i++ , img += 3)
{
a = src[i] - 255;
k = a + img[0];
img[0] = k < 0 ? 0 : k;
k = a + img[1];
img[1] = k < 0 ? 0 : k;
k = a + img[2];
img[2] = k < 0 ? 0 : k;
}
}
mem_demultiply(tmp, src, j, bpp);
tmp = NULL; // Image is done
}
if (bits1 < 8)
{
/* Rescale alpha */
if (src) do_xlate(xtable, src, j);
/* Rescale RGB */
if (tmp && (wbpp == 3)) do_xlate(xtable, tmp, j * 3);
}
res = 1;
}
fail2: if (pr) progress_end();
if (raster) _TIFFfree(raster);
if (buf) _TIFFfree(buf);
return (res);
}
static int load_tiff_frames(char *file_name, ani_settings *ani)
{
TIFF *tif;
ls_settings w_set;
int res;
/* We don't want any echoing to the output */
TIFFSetErrorHandler(NULL);
TIFFSetWarningHandler(NULL);
if (!(tif = TIFFOpen(file_name, "r"))) return (-1);
while (TRUE)
{
res = FILE_TOO_LONG;
if (!check_next_frame(&ani->fset, ani->settings.mode, FALSE))
goto fail;
w_set = ani->settings;
res = load_tiff_frame(tif, &w_set);
if (res != 1) goto fail;
res = process_page_frame(file_name, ani, &w_set);
if (res) goto fail;
/* Try to get next frame */
if (!TIFFReadDirectory(tif)) break;
}
res = 1;
fail: TIFFClose(tif);
return (res);
}
static int load_tiff(char *file_name, ls_settings *settings)
{
TIFF *tif;
int res;
/* We don't want any echoing to the output */
TIFFSetErrorHandler(NULL);
TIFFSetWarningHandler(NULL);
if (!(tif = TIFFOpen(file_name, "r"))) return (-1);
res = load_tiff_frame(tif, settings);
if ((res == 1) && TIFFReadDirectory(tif)) res = FILE_HAS_FRAMES;
TIFFClose(tif);
return (res);
}
#define TIFFX_VERSION 0 // mtPaint's TIFF extensions version
static int save_tiff(char *file_name, ls_settings *settings)
{
/* !!! No private exts for now */
// char buf[512];
unsigned char *src, *row = NULL;
uint16 rgb[256 * 3], xs[NUM_CHANNELS];
int i, j, k, dt, xsamp = 0, cmask = CMASK_IMAGE, res = 0;
int w = settings->width, h = settings->height, bpp = settings->bpp;
TIFF *tif;
/* Find out number of utility channels */
memset(xs, 0, sizeof(xs));
/* !!! Only alpha channel as extra, for now */
for (i = CHN_ALPHA; i <= CHN_ALPHA; i++)
// for (i = CHN_ALPHA; i < NUM_CHANNELS; i++)
{
if (!settings->img[i]) continue;
cmask |= CMASK_FOR(i);
xs[xsamp++] = i == CHN_ALPHA ? EXTRASAMPLE_UNASSALPHA :
EXTRASAMPLE_UNSPECIFIED;
}
if (xsamp)
{
row = malloc(w * (bpp + xsamp));
if (!row) return -1;
}
TIFFSetErrorHandler(NULL); // We don't want any echoing to the output
TIFFSetWarningHandler(NULL);
if (!(tif = TIFFOpen( file_name, "w" )))
{
free(row);
return -1;
}
/* !!! No private exts for now */
#if 0
/* Write private extension info in comments */
TIFFSetField(tif, TIFFTAG_SOFTWARE, "mtPaint 3");
// Extensions' version, then everything useful but lacking a TIFF tag
i = sprintf(buf, "VERSION=%d\n", TIFFX_VERSION);
i += sprintf(buf + i, "CHANNELS=%d\n", cmask);
i += sprintf(buf + i, "COLORS=%d\n", settings->colors);
i += sprintf(buf + i, "TRANSPARENCY=%d\n",
bpp == 1 ? settings->xpm_trans : settings->rgb_trans);
TIFFSetField(tif, TIFFTAG_IMAGEDESCRIPTION, buf);
#endif
/* Write regular tags */
TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, w);
TIFFSetField(tif, TIFFTAG_IMAGELENGTH, h);
TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, bpp + xsamp);
TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
if (bpp == 1)
{
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_PALETTE);
memset(rgb, 0, sizeof(rgb));
for (i = 0; i < settings->colors; i++)
{
rgb[i] = settings->pal[i].red * 257;
rgb[i + 256] = settings->pal[i].green * 257;
rgb[i + 512] = settings->pal[i].blue * 257;
}
TIFFSetField(tif, TIFFTAG_COLORMAP, rgb, rgb + 256, rgb + 512);
}
else TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
if (xsamp) TIFFSetField(tif, TIFFTAG_EXTRASAMPLES, xsamp, xs);
/* Actually write the image */
if (!settings->silent) ls_init("TIFF", 1);
xsamp += bpp;
for (i = 0; i < h; i++)
{
src = settings->img[CHN_IMAGE] + w * i * bpp;
if (row) /* Interlace the channels */
{
for (dt = k = 0; k < w * bpp; k += bpp , dt += xsamp)
{
row[dt] = src[k];
if (bpp == 1) continue;
row[dt + 1] = src[k + 1];
row[dt + 2] = src[k + 2];
}
for (dt = bpp , j = CHN_ALPHA; j < NUM_CHANNELS; j++)
{
if (!settings->img[j]) continue;
src = settings->img[j] + w * i;
for (k = 0; k < w; k++ , dt += xsamp)
{
row[dt] = src[k];
}
dt -= w * xsamp - 1;
}
}
if (TIFFWriteScanline(tif, row ? row : src, i, 0) == -1)
{
res = -1;
break;
}
ls_progress(settings, i, 20);
}
TIFFClose(tif);
if (!settings->silent) progress_end();
free(row);
return (res);
}
#endif
/* Macros for accessing values in Intel byte order */
#define GET16(buf) (((buf)[1] << 8) + (buf)[0])
#define GET32(buf) (((buf)[3] << 24) + ((buf)[2] << 16) + ((buf)[1] << 8) + (buf)[0])
#define PUT16(buf, v) (buf)[0] = (v) & 0xFF; (buf)[1] = (v) >> 8;
#define PUT32(buf, v) (buf)[0] = (v) & 0xFF; (buf)[1] = ((v) >> 8) & 0xFF; \
(buf)[2] = ((v) >> 16) & 0xFF; (buf)[3] = (v) >> 24;
/* Version 2 fields */
#define BMP_FILESIZE 2 /* 32b */
#define BMP_DATAOFS 10 /* 32b */
#define BMP_HDR2SIZE 14 /* 32b */
#define BMP_WIDTH 18 /* 32b */
#define BMP_HEIGHT 22 /* 32b */
#define BMP_PLANES 26 /* 16b */
#define BMP_BPP 28 /* 16b */
#define BMP2_HSIZE 30
/* Version 3 fields */
#define BMP_COMPRESS 30 /* 32b */
#define BMP_DATASIZE 34 /* 32b */
#define BMP_COLORS 46 /* 32b */
#define BMP_ICOLORS 50 /* 32b */
#define BMP3_HSIZE 54
/* Version 4 fields */
#define BMP_RMASK 54 /* 32b */
#define BMP_GMASK 58 /* 32b */
#define BMP_BMASK 62 /* 32b */
#define BMP_AMASK 66 /* 32b */
#define BMP_CSPACE 70 /* 32b */
#define BMP4_HSIZE 122
#define BMP5_HSIZE 138
#define BMP_MAXHSIZE (BMP5_HSIZE + 256 * 4)
static int load_bmp(char *file_name, ls_settings *settings, memFILE *mf)
{
guint32 masks[4];
unsigned char hdr[BMP5_HSIZE], xlat[256], *dest, *tmp, *buf = NULL;
memFILE fake_mf;
FILE *fp = NULL;
int shifts[4], bpps[4];
int def_alpha = FALSE, cmask = CMASK_IMAGE, comp = 0, res = -1;
int i, j, k, n, ii, w, h, bpp;
int l, bl, rl, step, skip, dx, dy;
if (!mf)
{
if (!(fp = fopen(file_name, "rb"))) return (-1);
memset(mf = &fake_mf, 0, sizeof(fake_mf));
fake_mf.file = fp;
}
/* Read the largest header */
k = mfread(hdr, 1, BMP5_HSIZE, mf);
/* Check general validity */
if (k < BMP2_HSIZE) goto fail; /* Least supported header size */
if ((hdr[0] != 'B') || (hdr[1] != 'M')) goto fail; /* Signature */
l = GET32(hdr + BMP_HDR2SIZE) + BMP_HDR2SIZE;
if (k < l) goto fail;
/* Check format */
if (GET16(hdr + BMP_PLANES) != 1) goto fail; /* Only one plane */
w = GET32(hdr + BMP_WIDTH);
h = GET32(hdr + BMP_HEIGHT);
bpp = GET16(hdr + BMP_BPP);
if (l >= BMP3_HSIZE) comp = GET32(hdr + BMP_COMPRESS);
/* Only 1, 4, 8, 16, 24 and 32 bpp allowed */
switch (bpp)
{
case 1: if (comp) goto fail; /* No compression */
break;
case 4: if (comp && ((comp != 2) || (h < 0))) goto fail; /* RLE4 */
break;
case 8: if (comp && ((comp != 1) || (h < 0))) goto fail; /* RLE8 */
break;
case 16: case 24: case 32:
if (comp && (comp != 3)) goto fail; /* Bitfields */
shifts[3] = bpps[3] = masks[3] = 0; /* No alpha by default */
if (comp == 3)
{
/* V3-style bitfields? */
if ((l == BMP3_HSIZE) &&
(GET32(hdr + BMP_DATAOFS) >= BMP_AMASK))
l = BMP_AMASK;
if (l < BMP_AMASK) goto fail;
masks[0] = GET32(hdr + BMP_RMASK);
masks[1] = GET32(hdr + BMP_GMASK);
masks[2] = GET32(hdr + BMP_BMASK);
if (l >= BMP_AMASK + 4)
masks[3] = GET32(hdr + BMP_AMASK);
if (masks[3]) cmask = CMASK_RGBA;
/* Convert masks into bit lengths and offsets */
for (i = 0; i < 4; i++)
{
/* Bit length - just count bits */
j = bitcount(masks[i]);
/* Bit offset - add in bits _before_ mask */
k = bitcount(masks[i] - 1) + 1;
if (j > 8) j = 8;
shifts[i] = k - j;
bpps[i] = j;
}
}
else if (bpp == 16)
{
shifts[0] = 10;
shifts[1] = 5;
shifts[2] = 0;
bpps[0] = bpps[1] = bpps[2] = 5;
}
else
{
shifts[0] = 16;
shifts[1] = 8;
shifts[2] = 0;
bpps[0] = bpps[1] = bpps[2] = 8;
if (bpp == 32) /* Consider alpha present by default */
{
shifts[3] = 24;
bpps[3] = 8;
cmask = CMASK_RGBA;
def_alpha = TRUE; /* Uncertain if alpha */
}
}
break;
default: goto fail;
}
/* Load palette if needed */
if (bpp < 16)
{
unsigned char tbuf[1024];
j = 0;
if (l >= BMP_COLORS + 4) j = GET32(hdr + BMP_COLORS);
if (!j) j = 1 << bpp;
k = GET32(hdr + BMP_DATAOFS) - l;
k /= l < BMP3_HSIZE ? 3 : 4;
if (k < j) j = k;
if (!j || (j > 256)) goto fail; /* Wrong palette size */
settings->colors = j;
mfseek(mf, l, SEEK_SET);
k = l < BMP3_HSIZE ? 3 : 4;
i = mfread(tbuf, 1, j * k, mf);
if (i < j * k) goto fail; /* Cannot read palette */
tmp = tbuf;
for (i = 0; i < j; i++)
{
settings->pal[i].red = tmp[2];
settings->pal[i].green = tmp[1];
settings->pal[i].blue = tmp[0];
tmp += k;
}
/* If palette is all we need */
res = 1;
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF)) goto fail;
}
/* Allocate buffer and image */
settings->width = w;
settings->height = abs(h);
settings->bpp = bpp < 16 ? 1 : 3;
rl = ((w * bpp + 31) >> 3) & ~3; /* Row data length */
/* For RLE, load all image at once */
if (comp && (bpp < 16))
bl = GET32(hdr + BMP_FILESIZE) - GET32(hdr + BMP_DATAOFS);
/* Otherwise, only one row at a time */
else bl = rl;
/* To accommodate bitparser's extra step */
buf = malloc(bl + 1);
res = FILE_MEM_ERROR;
if (!buf) goto fail;
if ((res = allocate_image(settings, cmask))) goto fail2;
if (!settings->silent) ls_init("BMP", 0);
mfseek(mf, GET32(hdr + BMP_DATAOFS), SEEK_SET); /* Seek to data */
if (h < 0) /* Prepare row loop */
{
step = 1;
i = 0;
h = -h;
}
else
{
step = -1;
i = h - 1;
}
res = FILE_LIB_ERROR;
if ((comp != 1) && (comp != 2)) /* No RLE */
{
for (n = 0; (i < h) && (i >= 0); n++ , i += step)
{
j = mfread(buf, 1, rl, mf);
if (j < rl) goto fail3;
if (bpp < 16) /* Indexed */
{
dest = settings->img[CHN_IMAGE] + w * i;
stream_MSB(buf, dest, w, bpp, 0, bpp, 1);
}
else /* RGB */
{
dest = settings->img[CHN_IMAGE] + w * i * 3;
stream_LSB(buf, dest + 0, w, bpps[0],
shifts[0], bpp, 3);
stream_LSB(buf, dest + 1, w, bpps[1],
shifts[1], bpp, 3);
stream_LSB(buf, dest + 2, w, bpps[2],
shifts[2], bpp, 3);
if (settings->img[CHN_ALPHA])
stream_LSB(buf, settings->img[CHN_ALPHA] +
w * i, w, bpps[3], shifts[3], bpp, 1);
}
ls_progress(settings, n, 10);
}
/* Rescale shorter-than-byte RGBA components */
if (bpp > 8)
for (i = 0; i < 4; i++)
{
if (bpps[i] >= 8) continue;
k = 3;
if (i == 3)
{
tmp = settings->img[CHN_ALPHA];
if (!tmp) continue;
k = 1;
}
else tmp = settings->img[CHN_IMAGE] + i;
set_xlate(xlat, bpps[i]);
n = w * h;
for (j = 0; j < n; j++ , tmp += k) *tmp = xlat[*tmp];
}
res = 1;
}
else /* RLE - always bottom-up */
{
k = mfread(buf, 1, bl, mf);
if (k < bl) goto fail3;
memset(settings->img[CHN_IMAGE], 0, w * h);
skip = j = 0;
dest = settings->img[CHN_IMAGE] + w * i;
for (tmp = buf; tmp - buf + 1 < k; )
{
/* Don't fail on out-of-bounds writes */
if (*tmp) /* Fill block */
{
dx = n = *tmp;
if (j + n > w) dx = j > w ? 0 : w - j;
if (bpp == 8) /* 8-bit */
{
memset(dest + j, tmp[1], dx);
j += n; tmp += 2;
continue;
}
for (ii = 0; ii < dx; ii++) /* 4-bit */
{
dest[j++] = tmp[1] >> 4;
if (++ii >= dx) break;
dest[j++] = tmp[1] & 0xF;
}
j += n - dx;
tmp += 2;
continue;
}
if (tmp[1] > 2) /* Copy block */
{
dx = n = tmp[1];
if (j + n > w) dx = j > w ? 0 : w - j;
tmp += 2;
if (bpp == 8) /* 8-bit */
{
memcpy(dest + j, tmp, dx);
j += n; tmp += (n + 1) & ~1;
continue;
}
for (ii = 0; ii < dx; ii++) /* 4-bit */
{
dest[j++] = *tmp >> 4;
if (++ii >= dx) break;
dest[j++] = *tmp++ & 0xF;
}
j += n - dx;
tmp += (((n + 3) & ~3) - (dx & ~1)) >> 1;
continue;
}
if (tmp[1] == 2) /* Skip block */
{
dx = tmp[2] + j;
dy = tmp[3];
if ((dx > w) || (i - dy < 0)) goto fail3;
}
else /* End-of-something block */
{
dx = 0;
dy = tmp[1] ? i + 1 : 1;
}
/* Transparency detected first time? */
if (!skip && ((dy != 1) || dx || (j < w)))
{
if ((res = allocate_image(settings,
CMASK_FOR(CHN_ALPHA)))) goto fail3;
res = FILE_LIB_ERROR;
skip = 1;
if (settings->img[CHN_ALPHA]) /* Got alpha */
{
memset(settings->img[CHN_ALPHA], 255, w * h);
skip = 2;
}
}
/* Row skip */
for (ii = 0; ii < dy; ii++ , i--)
{
if (skip > 1) memset(settings->img[CHN_ALPHA] +
w * i + j, 0, w - j);
j = 0;
ls_progress(settings, h - i - 1, 10);
}
/* Column skip */
if (skip > 1) memset(settings->img[CHN_ALPHA] +
w * i + j, 0, dx - j);
j = dx;
if (tmp[1] == 1) /* End-of-file block */
{
res = 1;
break;
}
dest = settings->img[CHN_IMAGE] + w * i;
tmp += 2 + tmp[1];
}
}
/* Check if alpha channel is valid */
if (def_alpha && settings->img[CHN_ALPHA])
{
/* Delete all-zero "alpha" */
if (is_filled(settings->img[CHN_ALPHA], 0,
settings->width * settings->height))
deallocate_image(settings, CMASK_FOR(CHN_ALPHA));
}
fail3: if (!settings->silent) progress_end();
fail2: free(buf);
fail: if (fp) fclose(fp);
return (res);
}
/* Use BMP4 instead of BMP3 for images with alpha */
/* #define USE_BMP4 */ /* Most programs just use 32-bit RGB BMP3 for RGBA */
static int save_bmp(char *file_name, ls_settings *settings, memFILE *mf)
{
unsigned char *buf, *tmp;
memFILE fake_mf;
FILE *fp = NULL;
int i, j, ll, hsz0, hsz, dsz, fsz;
int w = settings->width, h = settings->height, bpp = settings->bpp;
i = w > BMP_MAXHSIZE / 4 ? w * 4 : BMP_MAXHSIZE;
buf = malloc(i);
if (!buf) return (-1);
memset(buf, 0, i);
if (!mf)
{
if (!(fp = fopen(file_name, "wb")))
{
free(buf);
return (-1);
}
memset(mf = &fake_mf, 0, sizeof(fake_mf));
fake_mf.file = fp;
}
/* Sizes of BMP parts */
if (((settings->mode == FS_CLIPBOARD) || (bpp == 3)) &&
settings->img[CHN_ALPHA]) bpp = 4;
ll = (bpp * w + 3) & ~3;
j = bpp == 1 ? settings->colors : 0;
#ifdef USE_BMP4
hsz0 = bpp == 4 ? BMP4_HSIZE : BMP3_HSIZE;
#else
hsz0 = BMP3_HSIZE;
#endif
hsz = hsz0 + j * 4;
dsz = ll * h;
fsz = hsz + dsz;
/* Prepare header */
buf[0] = 'B'; buf[1] = 'M';
PUT32(buf + BMP_FILESIZE, fsz);
PUT32(buf + BMP_DATAOFS, hsz);
i = hsz0 - BMP_HDR2SIZE;
PUT32(buf + BMP_HDR2SIZE, i);
PUT32(buf + BMP_WIDTH, w);
PUT32(buf + BMP_HEIGHT, h);
PUT16(buf + BMP_PLANES, 1);
PUT16(buf + BMP_BPP, bpp * 8);
#ifdef USE_BMP4
i = bpp == 4 ? 3 : 0; /* Bitfield "compression" / no compression */
PUT32(buf + BMP_COMPRESS, i);
#else
PUT32(buf + BMP_COMPRESS, 0); /* No compression */
#endif
PUT32(buf + BMP_DATASIZE, dsz);
PUT32(buf + BMP_COLORS, j);
PUT32(buf + BMP_ICOLORS, j);
#ifdef USE_BMP4
if (bpp == 4)
{
memset(buf + BMP_RMASK, 0, BMP4_HSIZE - BMP_RMASK);
buf[BMP_RMASK + 2] = buf[BMP_GMASK + 1] = buf[BMP_BMASK + 0] =
buf[BMP_AMASK + 3] = 0xFF; /* Masks for 8-bit BGRA */
buf[BMP_CSPACE] = 1; /* Device-dependent RGB */
}
#endif
tmp = buf + hsz0;
for (i = 0; i < j; i++ , tmp += 4)
{
tmp[0] = settings->pal[i].blue;
tmp[1] = settings->pal[i].green;
tmp[2] = settings->pal[i].red;
}
mfwrite(buf, 1, tmp - buf, mf);
/* Write rows */
if (!settings->silent) ls_init("BMP", 1);
memset(buf + ll - 4, 0, 4);
for (i = h - 1; i >= 0; i--)
{
prepare_row(buf, settings, bpp, i);
mfwrite(buf, 1, ll, mf);
ls_progress(settings, h - i, 20);
}
if (fp) fclose(fp);
if (!settings->silent) progress_end();
free(buf);
return 0;
}
/* Partial ctype implementation for C locale;
* space 1, digit 2, alpha 4, punctuation 8 */
static unsigned char ctypes[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 8, 8, 8, 8, 8, 8,
8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 4,
8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
#define ISSPACE(x) (ctypes[(unsigned char)(x)] & 1)
#define ISALPHA(x) (ctypes[(unsigned char)(x)] & 4)
#define ISALNUM(x) (ctypes[(unsigned char)(x)] & 6)
#define ISCNTRL(x) (!ctypes[(unsigned char)(x)])
#define WHITESPACE "\t\n\v\f\r "
/* Reads text and cuts out C-style comments */
static char *fgetsC(char *buf, int len, FILE *f)
{
static int in_comment;
char *res;
int i, l, in_string = 0, has_chars = 0;
if (!len) /* Init */
{
*buf = '\0';
in_comment = 0;
return (NULL);
}
while (TRUE)
{
/* Read a line */
buf[0] = '\0';
res = fgets(buf, len, f);
if (res != buf) return (res);
/* Scan it for comments */
l = strlen(buf);
for (i = 0; i < l; i++)
{
if (in_string)
{
if ((buf[i] == '"') && (buf[i - 1] != '\\'))
in_string = 0; /* Close a string */
continue;
}
if (in_comment)
{
if ((buf[i] == '/') && i && (buf[i - 1] == '*'))
{
/* Replace comment by a single space */
buf[in_comment - 1] = ' ';
memcpy(buf + in_comment, buf + i + 1, l - i);
l = in_comment + l - i - 1;
i = in_comment - 1;
in_comment = 0;
}
continue;
}
if (!ISSPACE(buf[i])) has_chars++;
if (buf[i] == '"')
in_string = 1; /* Open a string */
else if ((buf[i] == '*') && i && (buf[i - 1] == '/'))
{
/* Open a comment */
in_comment = i;
has_chars -= 2;
}
}
/* For simplicity, have strings terminate on the same line */
if (in_string) return (NULL);
/* All line is a comment - read the next one */
if (in_comment == 1) continue;
/* Cut off and remember non-closed comment */
if (in_comment)
{
buf[in_comment - 1] = '\0';
in_comment = 1;
}
/* All line is whitespace - read the next one */
if (!has_chars) continue;
return (res);
}
}
/* "One at a time" hash function */
static guint32 hashf(guint32 seed, char *key, int len)
{
int i;
for (i = 0; i < len; i++)
{
seed += key[i];
seed += seed << 10;
seed ^= seed >> 6;
}
seed += seed << 3;
seed ^= seed >> 11;
seed += seed << 15;
return (seed);
}
#define HASHSEED 0x811C9DC5
#define HASH_RND(X) ((X) * 0x10450405 + 1)
#define HSIZE 16384
#define HMASK 0x1FFF
/* For cuckoo hashing of 4096 items into 16384 slots */
#define MAXLOOP 39
/* This is the limit from libXPM */
#define XPM_MAXCOL 4096
/* Cuckoo hash of IDs for load or RGB triples for save */
typedef struct {
short hash[HSIZE];
char *keys;
int step, cpp, cnt;
guint32 seed;
} str_hash;
static int ch_find(str_hash *cuckoo, char *str)
{
guint32 key;
int k, idx, step = cuckoo->step, cpp = cuckoo->cpp;
key = hashf(cuckoo->seed, str, cpp);
k = (key & HMASK) * 2;
while (TRUE)
{
idx = cuckoo->hash[k];
if (idx && !strncmp(cuckoo->keys + (idx - 1) * step, str, cpp))
return (idx);
if (k & 1) return (0); /* Not found */
k = ((key >> 16) & HMASK) * 2 + 1;
}
}
static int ch_insert(str_hash *cuckoo, char *str)
{
char *p, *keys;
guint32 key;
int i, j, k, n, idx, step, cpp;
n = ch_find(cuckoo, str);
if (n) return (n - 1);
keys = cuckoo->keys;
step = cuckoo->step; cpp = cuckoo->cpp;
if (cuckoo->cnt >= XPM_MAXCOL) return (-1);
p = keys + cuckoo->cnt++ * step;
memcpy(p, str, cpp); p[cpp] = 0;
for (n = cuckoo->cnt; n <= cuckoo->cnt; n++)
{
idx = n;
/* Normal cuckoo process */
for (i = 0; i < MAXLOOP; i++)
{
key = hashf(cuckoo->seed, keys + (idx - 1) * step, cpp);
key >>= (i & 1) << 4;
j = (key & HMASK) * 2 + (i & 1);
k = cuckoo->hash[j];
cuckoo->hash[j] = idx;
idx = k;
if (!idx) break;
}
if (!idx) continue;
/* Failed insertion - mutate seed */
cuckoo->seed = HASH_RND(cuckoo->seed);
memset(cuckoo->hash, 0, sizeof(short) * HSIZE);
n = 1; /* Rehash everything */
}
return (cuckoo->cnt - 1);
}
#define XPM_COL_DEFS 5
/* Comments are allowed where valid; but missing newlines or newlines where
* should be none aren't tolerated */
static int load_xpm(char *file_name, ls_settings *settings)
{
static const char *cmodes[XPM_COL_DEFS] =
{ "c", "g", "g4", "m", "s" };
unsigned char *src, *dest, pal[XPM_MAXCOL * 3];
char lbuf[4096], tstr[20], *buf = lbuf;
char ckeys[XPM_MAXCOL * 32], *cdefs[XPM_COL_DEFS], *r, *r2;
str_hash cuckoo;
FILE *fp;
int w, h, cols, cpp, hx, hy, lsz = 4096, res = -1, bpp = 1, trans = -1;
int i, j, k, l;
if (!(fp = fopen(file_name, "r"))) return (-1);
/* Read the header - accept XPM3 and nothing else */
j = 0; fscanf(fp, " /* XPM */%n", &j);
if (!j) goto fail;
fgetsC(lbuf, 0, fp); /* Reset reader */
/* Read the "intro sequence" */
if (!fgetsC(lbuf, 4096, fp)) goto fail;
/* !!! Skip validation; libXpm doesn't do it, and some weird tools
* write this line differently - WJ */
// j = 0; sscanf(lbuf, " static char * %*[^[][] = {%n", &j);
// if (!j) goto fail;
/* Read the values section */
if (!fgetsC(lbuf, 4096, fp)) goto fail;
i = sscanf(lbuf, " \"%d%d%d%d%d%d", &w, &h, &cols, &cpp, &hx, &hy);
if (i == 4) hx = hy = -1;
else if (i != 6) goto fail;
/* Extension marker is ignored, as are extensions themselves */
/* More than 4096 colors or no colors at all aren't accepted */
if ((cols < 1) || (cols > XPM_MAXCOL)) goto fail;
/* Stupid colors per pixel values aren't either */
if ((cpp < 1) || (cpp > 31)) goto fail;
/* RGB image if more than 256 colors */
if (cols > 256) bpp = 3;
/* Store values */
settings->width = w;
settings->height = h;
settings->bpp = bpp;
if (bpp == 1) settings->colors = cols;
settings->hot_x = hx;
settings->hot_y = hy;
settings->xpm_trans = -1;
/* Init hash */
memset(&cuckoo, 0, sizeof(cuckoo));
cuckoo.keys = ckeys;
cuckoo.step = 32;
cuckoo.cpp = cpp;
cuckoo.seed = HASHSEED;
/* Read colormap */
// !!! When/if huge numbers of colors get allowed, will need a progressbar here
dest = pal;
sprintf(tstr, " \"%%n%%*%dc %%n", cpp);
for (i = 0; i < cols; i++ , dest += 3)
{
if (!fgetsC(lbuf, 4096, fp)) goto fail;
/* Parse color ID */
k = 0; sscanf(lbuf, tstr, &k, &l);
if (!k) goto fail;
/* Insert color into hash */
ch_insert(&cuckoo, lbuf + k);
/* Parse color definitions */
if (!(r = strchr(lbuf + l, '"'))) goto fail;
*r = '\0';
memset(cdefs, 0, sizeof(cdefs));
k = -1; r2 = NULL;
for (r = strtok(lbuf + l, " \t\n"); r; )
{
for (j = 0; j < XPM_COL_DEFS; j++)
{
if (!strcmp(r, cmodes[j])) break;
}
if (j < XPM_COL_DEFS) /* Key */
{
k = j; r2 = NULL;
}
else if (!r2) /* Color name */
{
if (k < 0) goto fail;
cdefs[k] = r2 = r;
}
else /* Add next part of name */
{
l = strlen(r2);
r2[l] = ' ';
if ((l = r - r2 - l - 1))
for (; (*(r - l) = *r); r++);
}
r = strtok(NULL, " \t\n");
}
if (!r2) goto fail; /* Key w/o name */
/* Translate the best one */
for (j = 0; j < XPM_COL_DEFS; j++)
{
GdkColor col;
if (!cdefs[j]) continue;
if (!strcasecmp(cdefs[j], "none")) /* Transparent */
{
trans = i;
break;
}
if (!gdk_color_parse(cdefs[j], &col)) continue;
dest[0] = (col.red + 128) / 257;
dest[1] = (col.green + 128) / 257;
dest[2] = (col.blue + 128) / 257;
break;
}
/* Not one understandable color */
if (j >= XPM_COL_DEFS) goto fail;
}
/* Create palette */
if (bpp == 1)
{
dest = pal;
for (i = 0; i < cols; i++ , dest += 3)
{
settings->pal[i].red = dest[0];
settings->pal[i].green = dest[1];
settings->pal[i].blue = dest[2];
}
if (trans >= 0)
{
settings->xpm_trans = trans;
settings->pal[trans].red = settings->pal[trans].green = 115;
settings->pal[trans].blue = 0;
}
/* If palette is all we need */
res = 1;
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF)) goto fail;
}
/* Find an unused color for transparency */
else if (trans >= 0)
{
char cmap[XPM_MAXCOL + 1];
memset(cmap, 0, sizeof(cmap));
dest = pal;
for (i = 0; i < cols; i++ , dest += 3)
{
j = MEM_2_INT(dest, 0);
if (j < XPM_MAXCOL) cmap[j] = 1;
}
settings->rgb_trans = j = strlen(cmap);
dest = pal + trans * 3;
dest[0] = INT_2_R(j);
dest[1] = INT_2_G(j);
dest[2] = INT_2_B(j);
}
/* Allocate row buffer and image */
i = w * cpp + 4 + 1024;
if (i > lsz) buf = malloc(lsz = i);
res = FILE_MEM_ERROR;
if (!buf) goto fail;
if ((res = allocate_image(settings, CMASK_IMAGE))) goto fail2;
if (!settings->silent) ls_init("XPM", 0);
/* Now, read the image */
res = FILE_LIB_ERROR;
dest = settings->img[CHN_IMAGE];
for (i = 0; i < h; i++)
{
if (!fgetsC(buf, lsz, fp)) goto fail3;
if (!(r = strchr(buf, '"'))) goto fail3;
if (++r - buf + w * cpp >= lsz) goto fail3;
for (j = 0; j < w; j++ , dest += bpp)
{
k = ch_find(&cuckoo, r);
if (!k) goto fail3;
r += cpp;
if (bpp == 1) *dest = k - 1;
else
{
src = (pal - 3) + k * 3;
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
}
}
ls_progress(settings, i, 10);
}
res = 1;
fail3: if (!settings->silent) progress_end();
fail2: if (buf != lbuf) free(buf);
fail: fclose(fp);
return (res);
}
static const char base64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
hex[] = "0123456789ABCDEF";
/* Extract valid C identifier from filename */
static char *extract_ident(char *fname, int *len)
{
char *tmp;
int l;
tmp = strrchr(fname, DIR_SEP);
tmp = tmp ? tmp + 1 : fname;
for (; *tmp && !ISALPHA(*tmp); tmp++);
for (l = 0; (l < 256) && ISALNUM(tmp[l]); l++);
*len = l;
return (tmp);
}
static int save_xpm(char *file_name, ls_settings *settings)
{
unsigned char rgbmem[XPM_MAXCOL * 4], *src;
const char *ctb;
char ws[3], *buf, *tmp;
str_hash cuckoo;
FILE *fp;
int bpp = settings->bpp, w = settings->width, h = settings->height;
int i, j, k, l, cpp, cols, trans = -1;
tmp = extract_ident(file_name, &l);
if (!l) return -1;
/* Collect RGB colors */
if (bpp == 3)
{
/* Init hash */
memset(&cuckoo, 0, sizeof(cuckoo));
cuckoo.keys = rgbmem;
cuckoo.step = 4;
cuckoo.cpp = 3;
cuckoo.seed = HASHSEED;
j = w * h;
src = settings->img[CHN_IMAGE];
for (i = 0; i < j; i++ , src += 3)
{
if (ch_insert(&cuckoo, src) < 0)
return (WRONG_FORMAT); /* Too many colors */
}
cols = cuckoo.cnt;
trans = settings->rgb_trans;
/* RGB to index */
if (trans > -1)
{
char trgb[3];
trgb[0] = INT_2_R(trans);
trgb[1] = INT_2_G(trans);
trgb[2] = INT_2_B(trans);
trans = ch_find(&cuckoo, trgb) - 1;
}
}
/* Process indexed colors */
else
{
cols = settings->colors;
src = rgbmem;
for (i = 0; i < cols; i++ , src += 4)
{
src[0] = settings->pal[i].red;
src[1] = settings->pal[i].green;
src[2] = settings->pal[i].blue;
}
trans = settings->xpm_trans;
}
cpp = cols > 64 ? 2 : 1;
buf = malloc(w * cpp + 16);
if (!buf) return -1;
if (!(fp = fopen(file_name, "w")))
{
free(buf);
return -1;
}
if (!settings->silent) ls_init("XPM", 1);
fprintf(fp, "/* XPM */\n" );
fprintf(fp, "static char *%.*s_xpm[] = {\n", l, tmp);
if ((settings->hot_x >= 0) && (settings->hot_y >= 0))
fprintf(fp, "\"%d %d %d %d %d %d\",\n", w, h, cols, cpp,
settings->hot_x, settings->hot_y);
else fprintf(fp, "\"%d %d %d %d\",\n", w, h, cols, cpp);
/* Create colortable */
ctb = cols > 16 ? base64 : hex;
ws[1] = ws[2] = '\0';
for (i = 0; i < cols; i++)
{
if (i == trans)
{
ws[0] = ' ';
if (cpp > 1) ws[1] = ' ';
fprintf(fp, "\"%s\tc None\",\n", ws);
continue;
}
ws[0] = ctb[i & 63];
if (cpp > 1) ws[1] = ctb[i >> 6];
src = rgbmem + i * 4;
fprintf(fp, "\"%s\tc #%02X%02X%02X\",\n", ws,
src[0], src[1], src[2]);
}
w *= bpp;
for (i = 0; i < h; i++)
{
src = settings->img[CHN_IMAGE] + i * w;
tmp = buf;
*tmp++ = '"';
for (j = 0; j < w; j += bpp, tmp += cpp)
{
k = bpp == 1 ? src[j] : ch_find(&cuckoo, src + j) - 1;
if (k == trans) tmp[0] = tmp[1] = ' ';
else
{
tmp[0] = ctb[k & 63];
tmp[1] = ctb[k >> 6];
}
}
strcpy(tmp, i < h - 1 ? "\",\n" : "\"\n};\n");
fputs(buf, fp);
ls_progress(settings, i, 10);
}
fclose(fp);
if (!settings->silent) progress_end();
free(buf);
return 0;
}
static int load_xbm(char *file_name, ls_settings *settings)
{
static const char XPMtext[] = "0123456789ABCDEFabcdef,} \t\n",
XPMval[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
10, 11, 12, 13, 14, 15, 16, 16, 16, 16, 16 };
unsigned char ctb[256], *dest;
char lbuf[4096];
FILE *fp;
int w , h, hx = -1, hy = -1, bpn = 16, res = -1;
int i, j, k, c, v = 0;
if (!(fp = fopen(file_name, "r"))) return (-1);
/* Read & parse what serves as header to XBM */
fgetsC(lbuf, 0, fp); /* Reset reader */
/* Width and height - required part in fixed order */
if (!fgetsC(lbuf, 4096, fp)) goto fail;
if (!sscanf(lbuf, "#define %*s%n %d", &i, &w)) goto fail;
if (strncmp(lbuf + i - 5, "width", 5)) goto fail;
if (!fgetsC(lbuf, 4096, fp)) goto fail;
if (!sscanf(lbuf, "#define %*s%n %d", &i, &h)) goto fail;
if (strncmp(lbuf + i - 6, "height", 6)) goto fail;
/* Hotspot X and Y - optional part in fixed order */
if (!fgetsC(lbuf, 4096, fp)) goto fail;
if (sscanf(lbuf, "#define %*s%n %d", &i, &hx))
{
if (strncmp(lbuf + i - 5, "x_hot", 5)) goto fail;
if (!fgetsC(lbuf, 4096, fp)) goto fail;
if (!sscanf(lbuf, "#define %*s%n %d", &i, &hy)) goto fail;
if (strncmp(lbuf + i - 5, "y_hot", 5)) goto fail;
if (!fgetsC(lbuf, 4096, fp)) goto fail;
}
/* "Intro" string */
j = 0; sscanf(lbuf, " static short %*[^[]%n[] = {%n", &i, &j);
if (!j)
{
bpn = 8; /* X11 format - 8-bit data */
j = 0; sscanf(lbuf, " static unsigned char %*[^[]%n[] = {%n", &i, &j);
if (!j) sscanf(lbuf, " static char %*[^[]%n[] = {%n", &i, &j);
if (!j) goto fail;
}
if (strncmp(lbuf + i - 4, "bits", 4)) goto fail;
/* Store values */
settings->width = w;
settings->height = h;
settings->bpp = 1;
settings->hot_x = hx;
settings->hot_y = hy;
/* Palette is white and black */
set_bw(settings);
/* Allocate image */
if ((res = allocate_image(settings, CMASK_IMAGE))) goto fail;
/* Prepare to read data */
memset(ctb, 17, sizeof(ctb));
for (i = 0; XPMtext[i]; i++)
{
ctb[(unsigned char)XPMtext[i]] = XPMval[i];
}
/* Now, read the image */
if (!settings->silent) ls_init("XBM", 0);
res = FILE_LIB_ERROR;
dest = settings->img[CHN_IMAGE];
for (i = 0; i < h; i++)
{
for (j = k = 0; j < w; j++ , k--)
{
if (!k) /* Get next value, the way X itself does */
{
v = 0;
while (TRUE)
{
if ((c = getc(fp)) == EOF) goto fail2;
c = ctb[c & 255];
if (c < 16) /* Accept hex digits */
{
v = (v << 4) + c;
k++;
}
/* Silently ignore out-of-place chars */
else if (c > 16) continue;
/* Stop on delimiters after digits */
else if (k) break;
}
k = bpn;
}
*dest++ = v & 1;
v >>= 1;
}
ls_progress(settings, i, 10);
}
res = 1;
fail2: if (!settings->silent) progress_end();
fail: fclose(fp);
return (res);
}
#define BPL 12 /* Bytes per line */
#define CPB 6 /* Chars per byte */
static int save_xbm(char *file_name, ls_settings *settings)
{
unsigned char *src;
unsigned char row[MAX_WIDTH / 8];
char buf[CPB * BPL + 16], *tmp;
FILE *fp;
int i, j, k, l, w = settings->width, h = settings->height;
if ((settings->bpp != 1) || (settings->colors > 2)) return WRONG_FORMAT;
/* Extract valid C identifier from name */
tmp = extract_ident(file_name, &i);
if (!i) return -1;
if (!(fp = fopen(file_name, "w"))) return -1;
fprintf(fp, "#define %.*s_width %i\n", i, tmp, w);
fprintf(fp, "#define %.*s_height %i\n", i, tmp, h);
if ((settings->hot_x >= 0) && (settings->hot_y >= 0))
{
fprintf(fp, "#define %.*s_x_hot %i\n", i, tmp, settings->hot_x);
fprintf(fp, "#define %.*s_y_hot %i\n", i, tmp, settings->hot_y);
}
fprintf(fp, "static unsigned char %.*s_bits[] = {\n", i, tmp);
if (!settings->silent) ls_init("XBM", 1);
j = k = (w + 7) >> 3; i = l = 0;
while (TRUE)
{
if (j >= k)
{
if (i >= h) break;
src = settings->img[CHN_IMAGE] + i * w;
memset(row, 0, k);
for (j = 0; j < w; j++)
{
if (src[j] == 1) row[j >> 3] |= 1 << (j & 7);
}
j = 0;
ls_progress(settings, i, 10);
i++;
}
for (; (l < BPL) && (j < k); l++ , j++)
{
tmp = buf + l * CPB;
tmp[0] = ' '; tmp[1] = '0'; tmp[2] = 'x';
tmp[3] = hex[row[j] >> 4]; tmp[4] = hex[row[j] & 0xF];
tmp[5] = ',';
}
if ((l == BPL) && (j < k))
{
buf[BPL * CPB] = '\n'; buf[BPL * CPB + 1] = '\0';
fputs(buf, fp);
l = 0;
}
}
strcpy(buf + l * CPB - 1, " };\n");
fputs(buf, fp);
fclose(fp);
if (!settings->silent) progress_end();
return 0;
}
/*
* Those who don't understand PCX are condemned to reinvent it, poorly. :-)
*/
#define LSS_WIDTH 4 /* 16b */
#define LSS_HEIGHT 6 /* 16b */
#define LSS_PALETTE 8 /* 16 * 3 * 8b */
#define LSS_HSIZE 56
static int load_lss(char *file_name, ls_settings *settings)
{
unsigned char hdr[LSS_HSIZE], *dest, *tmp, *buf = NULL;
FILE *fp;
int i, j, k, w, h, bl, idx, last, cnt, res = -1;
if (!(fp = fopen(file_name, "rb"))) return (-1);
/* Read the header */
k = fread(hdr, 1, LSS_HSIZE, fp);
/* Check general validity */
if (k < LSS_HSIZE) goto fail; /* Least supported header size */
if (strncmp(hdr, "\x3D\xF3\x13\x14", 4)) goto fail; /* Signature */
w = GET16(hdr + LSS_WIDTH);
h = GET16(hdr + LSS_HEIGHT);
settings->width = w;
settings->height = h;
settings->bpp = 1;
settings->colors = 16;
/* Read palette */
tmp = hdr + LSS_PALETTE;
for (i = 0; i < 16; i++)
{
settings->pal[i].red = tmp[0] << 2 | tmp[0] >> 4;
settings->pal[i].green = tmp[1] << 2 | tmp[1] >> 4;
settings->pal[i].blue = tmp[2] << 2 | tmp[2] >> 4;
tmp += 3;
}
/* If palette is all we need */
res = 1;
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF)) goto fail;
/* Load all image at once */
fseek(fp, 0, SEEK_END);
bl = ftell(fp) - LSS_HSIZE;
fseek(fp, LSS_HSIZE, SEEK_SET);
i = (w * h * 3) >> 1;
if (bl > i) bl = i; /* Cannot possibly be longer */
buf = malloc(bl);
res = FILE_MEM_ERROR;
if (!buf) goto fail2;
if ((res = allocate_image(settings, CMASK_IMAGE))) goto fail2;
if (!settings->silent) ls_init("LSS16", 0);
res = FILE_LIB_ERROR;
j = fread(buf, 1, bl, fp);
if (j < bl) goto fail3;
dest = settings->img[CHN_IMAGE];
idx = 0; bl += bl;
for (i = 0; i < h; i++)
{
last = 0; idx = (idx + 1) & ~1;
for (j = 0; j < w; )
{
if (idx >= bl) goto fail3;
k = (buf[idx >> 1] >> ((idx & 1) << 2)) & 0xF; ++idx;
if (k != last)
{
dest[j++] = last = k;
continue;
}
if (idx >= bl) goto fail3;
cnt = (buf[idx >> 1] >> ((idx & 1) << 2)) & 0xF; ++idx;
if (!cnt)
{
if (idx >= bl) goto fail3;
cnt = (buf[idx >> 1] >> ((idx & 1) << 2)) & 0xF; ++idx;
if (idx >= bl) goto fail3;
k = (buf[idx >> 1] >> ((idx & 1) << 2)) & 0xF; ++idx;
cnt = (k << 4) + cnt + 16;
}
if (cnt > w - j) cnt = w - j;
memset(dest + j, last, cnt);
j += cnt;
}
dest += w;
}
res = 1;
fail3: if (!settings->silent) progress_end();
fail2: free(buf);
fail: fclose(fp);
return (res);
}
static int save_lss(char *file_name, ls_settings *settings)
{
unsigned char *buf, *tmp, *src;
FILE *fp;
int i, j, k, last, cnt, idx;
int w = settings->width, h = settings->height;
if ((settings->bpp != 1) || (settings->colors > 16)) return WRONG_FORMAT;
i = w > LSS_HSIZE ? w : LSS_HSIZE;
buf = malloc(i);
if (!buf) return -1;
memset(buf, 0, i);
if (!(fp = fopen(file_name, "wb")))
{
free(buf);
return -1;
}
/* Prepare header */
buf[0] = 0x3D; buf[1] = 0xF3; buf[2] = 0x13; buf[3] = 0x14;
PUT16(buf + LSS_WIDTH, w);
PUT16(buf + LSS_HEIGHT, h);
j = settings->colors > 16 ? 16 : settings->colors;
tmp = buf + LSS_PALETTE;
for (i = 0; i < j; i++)
{
tmp[0] = settings->pal[i].red >> 2;
tmp[1] = settings->pal[i].green >> 2;
tmp[2] = settings->pal[i].blue >> 2;
tmp += 3;
}
fwrite(buf, 1, LSS_HSIZE, fp);
/* Write rows */
if (!settings->silent) ls_init("LSS16", 1);
src = settings->img[CHN_IMAGE];
for (i = 0; i < h; i++)
{
memset(buf, 0, w);
last = cnt = idx = 0;
for (j = 0; j < w; )
{
for (; j < w; j++)
{
k = *src++ & 0xF;
if ((k != last) || (cnt >= 255 + 16)) break;
cnt++;
}
if (cnt)
{
buf[idx >> 1] |= last << ((idx & 1) << 2); ++idx;
if (cnt >= 16)
{
++idx; /* Insert zero */
cnt -= 16;
buf[idx >> 1] |= (cnt & 0xF) <<
((idx & 1) << 2); ++idx;
cnt >>= 4;
}
buf[idx >> 1] |= cnt << ((idx & 1) << 2); ++idx;
}
if (j++ >= w) break; /* Final repeat */
if (k == last)
{
cnt = 1;
continue; /* Chain of repeats */
}
cnt = 0;
buf[idx >> 1] |= k << ((idx & 1) << 2); ++idx;
last = k;
}
idx = (idx + 1) & ~1;
fwrite(buf, 1, idx >> 1, fp);
ls_progress(settings, i, 10);
}
fclose(fp);
if (!settings->silent) progress_end();
free(buf);
return 0;
}
/* *** PREFACE ***
* No other format has suffered so much at the hands of inept coders. With TGA,
* exceptions are the rule, and files perfectly following the specification are
* impossible to find. While I did my best to handle the format's perversions
* that I'm aware of, there surely exist other kinds of weird TGAs that will
* load wrong, or not at all. If you encounter one such, send a bugreport with
* the file attached to it. */
/* TGA header */
#define TGA_IDLEN 0 /* 8b */
#define TGA_PALTYPE 1 /* 8b */
#define TGA_IMGTYPE 2 /* 8b */
#define TGA_PALSTART 3 /* 16b */
#define TGA_PALCOUNT 5 /* 16b */
#define TGA_PALBITS 7 /* 8b */
#define TGA_X0 8 /* 16b */
#define TGA_Y0 10 /* 16b */
#define TGA_WIDTH 12 /* 16b */
#define TGA_HEIGHT 14 /* 16b */
#define TGA_BPP 16 /* 8b */
#define TGA_DESC 17 /* 8b */
#define TGA_HSIZE 18
/* Image descriptor bits */
#define TGA_ALPHA 0x0F
#define TGA_R2L 0x10
#define TGA_T2B 0x20
#define TGA_IL 0xC0 /* Interleave mode - obsoleted in TGA 2.0 */
/* TGA footer */
#define TGA_EXTOFS 0 /* 32b */
#define TGA_DEVOFS 4 /* 32b */
#define TGA_SIGN 8
#define TGA_FSIZE 26
/* TGA extension area */
#define TGA_EXTLEN 0 /* 16b */
#define TGA_SOFTID 426 /* 41 bytes */
#define TGA_SOFTV 467 /* 16b */
#define TGA_ATYPE 494 /* 8b */
#define TGA_EXTSIZE 495
static int load_tga(char *file_name, ls_settings *settings)
{
unsigned char hdr[TGA_HSIZE], ftr[TGA_FSIZE], ext[TGA_EXTSIZE];
unsigned char pal[256 * 4], xlat5[32], xlat67[128], trans[256];
unsigned char *buf = NULL, *dest, *dsta, *src = NULL, *srca = NULL;
FILE *fp;
int i, k, w, h, bpp, ftype, ptype, ibpp, rbits, abits, itrans = FALSE;
int rle, real_alpha = FALSE, assoc_alpha = FALSE, wmode = 0, res = -1;
int fl, fofs, iofs, buflen;
int ix, ishift, imask, ax, ashift, amask;
int start, xstep, xstepb, ystep, bstart, bstop, ccnt, rcnt, strl, y;
if (!(fp = fopen(file_name, "rb"))) return (-1);
/* Read the header */
k = fread(hdr, 1, TGA_HSIZE, fp);
if (k < TGA_HSIZE) goto fail;
/* TGA has no signature as such - so check fields one by one */
ftype = hdr[TGA_IMGTYPE];
if (!(ftype & 3) || (ftype & 0xF4)) goto fail; /* Invalid type */
/* Fail on interleave, because of lack of example files */
if (hdr[TGA_DESC] & TGA_IL) goto fail;
rle = ftype & 8;
iofs = TGA_HSIZE + hdr[TGA_IDLEN];
rbits = hdr[TGA_BPP];
if (!rbits) goto fail; /* Zero bpp */
abits = hdr[TGA_DESC] & TGA_ALPHA;
if (abits > rbits) goto fail; /* Weird alpha */
/* Workaround for a rather frequent bug */
if (abits == rbits) abits = 0;
ibpp = (rbits + 7) >> 3;
rbits -= abits;
ptype = hdr[TGA_PALTYPE];
switch (ftype & 3)
{
case 1: /* Paletted */
{
int pbpp, i, j, k, l;
png_color *pptr;
if (ptype != 1) goto fail; /* Invalid palette */
/* Don't want to bother with overlong palette without even
* having one example where such a thing exists - WJ */
if (rbits > 8) goto fail;
k = GET16(hdr + TGA_PALSTART);
if (k >= 1 << rbits) goto fail; /* Weird palette start */
j = GET16(hdr + TGA_PALCOUNT);
if (!j || (k + j > 1 << rbits)) goto fail; /* Weird size */
ptype = hdr[TGA_PALBITS];
/* The options are quite limited here in practice */
if (!ptype || (ptype > 32) || ((ptype & 7) && (ptype != 15)))
goto fail;
pbpp = (ptype + 7) >> 3;
l = j * pbpp;
/* Read the palette */
fseek(fp, iofs, SEEK_SET);
if (fread(pal + k * pbpp, 1, l, fp) != l) goto fail;
iofs += l;
/* Store the palette */
settings->colors = j + k;
memset(settings->pal, 0, 256 * 3);
if (pbpp == 2) set_xlate(xlat5, 5);
pptr = settings->pal + k;
for (i = 0; i < l; i += pbpp , pptr++)
{
switch (pbpp)
{
case 1: /* 8-bit greyscale */
pptr->red = pptr->green = pptr->blue = pal[i];
break;
case 2: /* 5:5:5 BGR */
pptr->blue = xlat5[pal[i] & 0x1F];
pptr->green = xlat5[(((pal[i + 1] << 8) +
pal[i]) >> 5) & 0x1F];
pptr->red = xlat5[(pal[i + 1] >> 2) & 0x1F];
break;
case 3: case 4: /* 8:8:8 BGR */
pptr->blue = pal[i + 0];
pptr->green = pal[i + 1];
pptr->red = pal[i + 2];
break;
}
}
/* If palette is all we need */
res = 1;
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF)) goto fail;
/* Assemble transparency table */
memset(trans, 255, 256);
if (ptype == 15)
{
int i, n, tr;
for (i = n = 0; i < j; i++) n += pal[i + i + 1] & 0x80;
/* Assume the less frequent value is transparent */
tr = n >> 6 < j ? 0x80 : 0;
for (i = 0; i < j; i++)
{
if ((pal[i + i + 1] & 0x80) == tr) trans[i + k] = 0;
}
}
else if (ptype == 32)
{
for (i = 0; i < j; i++) trans[i + k] = pal[i * 4 + 3];
}
else break; /* Cannot have transparent color at all */
/* If all alphas are identical, ignore them */
itrans = !is_filled(trans + k, trans[k], j);
break;
}
case 2: /* RGB */
/* Options are very limited - and bugs abound. Presence or
* absence of attribute bits can't be relied upon. */
switch (rbits)
{
case 16: /* 5:5:5 BGR or 5:6:5 BGR or 5:5:5:1 BGRA */
if (abits) goto fail;
if (tga_565)
{
set_xlate(xlat5, 5);
set_xlate(xlat67, 6);
wmode = 4;
break;
}
rbits = 15;
/* Fallthrough */
case 15: /* 5:5:5 BGR or 5:5:5:1 BGRA */
if (abits > 1) goto fail;
abits = 1; /* Here it's unreliable to uselessness */
set_xlate(xlat5, 5);
wmode = 2;
break;
case 32: /* 8:8:8 BGR or 8:8:8:8 BGRA */
if (abits) goto fail;
rbits = 24; abits = 8;
wmode = 6;
break;
case 24: /* 8:8:8 BGR or 8:8:8:8 BGRA */
if (abits && (abits != 8)) goto fail;
wmode = 6;
break;
default: goto fail;
}
break;
case 3: /* Greyscale */
/* Not enough examples - easier to handle all possibilities */
/* Create palette */
settings->colors = rbits > 8 ? 256 : 1 << rbits;
mem_bw_pal(settings->pal, 0, settings->colors - 1);
break;
}
/* Prepare for reading bitfields */
i = abits > 8 ? abits - 8 : 0;
abits -= i; i += rbits;
ax = i >> 3;
ashift = i & 7;
amask = (1 << abits) - 1;
i = rbits > 8 ? rbits - 8 : 0;
rbits -= i;
ix = i >> 3;
ishift = i & 7;
imask = (1 << rbits) - 1;
/* Now read the footer if one is available */
fseek(fp, 0, SEEK_END);
fl = ftell(fp);
while (fl >= iofs + TGA_FSIZE)
{
fseek(fp, fl - TGA_FSIZE, SEEK_SET);
k = fread(ftr, 1, TGA_FSIZE, fp);
if (k < TGA_FSIZE) break;
if (strcmp(ftr + TGA_SIGN, "TRUEVISION-XFILE.")) break;
fofs = GET32(ftr + TGA_EXTOFS);
if ((fofs < iofs) || (fofs + TGA_EXTSIZE + TGA_FSIZE > fl))
break; /* Invalid location */
fseek(fp, fofs, SEEK_SET);
k = fread(ext, 1, TGA_EXTSIZE, fp);
if ((k < TGA_EXTSIZE) ||
/* !!! 3D Studio writes 494 into this field */
(GET16(ext + TGA_EXTLEN) < TGA_EXTSIZE - 1))
break; /* Invalid size */
if ((ftype & 3) != 1) /* Premultiplied alpha? */
assoc_alpha = ext[TGA_ATYPE] == 4;
/* Can believe alpha bits contain alpha if this field says so */
real_alpha |= assoc_alpha | (ext[TGA_ATYPE] == 3);
/* !!! No private extensions for now */
#if 0
if (strcmp(ext + TGA_SOFTID, "mtPaint")) break;
if (GET16(ext + TGA_SOFTV) <= 310) break;
/* !!! Read and interpret developer directory */
#endif
break;
}
/* Allocate buffer and image */
settings->width = w = GET16(hdr + TGA_WIDTH);
settings->height = h = GET16(hdr + TGA_HEIGHT);
settings->bpp = bpp = (ftype & 3) == 2 ? 3 : 1;
buflen = ibpp * w;
if (rle && (w < 129)) buflen = ibpp * 129;
buf = malloc(buflen + 1); /* One extra byte for bitparser */
res = FILE_MEM_ERROR;
if (!buf) goto fail;
if ((res = allocate_image(settings, abits ? CMASK_RGBA : CMASK_IMAGE)))
goto fail2;
/* Don't even try reading alpha if nowhere to store it */
if (abits && settings->img[CHN_ALPHA]) wmode |= 1;
res = -1;
if (!settings->silent) ls_init("TGA", 0);
fseek(fp, iofs, SEEK_SET); /* Seek to data */
/* Prepare loops */
start = 0; xstep = 1; ystep = 0;
if (hdr[TGA_DESC] & TGA_R2L)
{
/* Right-to-left */
start = w - 1;
xstep = -1;
ystep = 2 * w;
}
if (!(hdr[TGA_DESC] & TGA_T2B))
{
/* Bottom-to-top */
start += (h - 1) * w;
ystep -= 2 * w;
}
xstepb = xstep * bpp;
res = FILE_LIB_ERROR;
dest = settings->img[CHN_IMAGE] + start * bpp;
dsta = settings->img[CHN_ALPHA] + start;
y = ccnt = rcnt = 0;
bstart = bstop = buflen;
strl = w;
while (TRUE)
{
int j;
j = bstop - bstart;
if (j < ibpp)
{
if (bstop < buflen) goto fail3; /* Truncated file */
memcpy(buf, buf + bstart, j);
bstart = 0;
bstop = j + fread(buf + j, 1, buflen - j, fp);
if (!rle) /* Uncompressed */
{
if (bstop < buflen) goto fail3; /* Truncated file */
rcnt = w; /* "Copy block" a row long */
}
}
while (TRUE)
{
/* Read pixels */
if (rcnt)
{
int l;
l = rcnt < strl ? rcnt : strl;
if (bstart + ibpp * l > bstop)
l = (bstop - bstart) / ibpp;
rcnt -= l; strl -= l;
while (l--)
{
switch (wmode)
{
case 1: /* Generic alpha */
*dsta = (((buf[bstart + ax + 1] << 8) +
buf[bstart + ax]) >> ashift) & amask;
case 0: /* Generic single channel */
*dest = (((buf[bstart + ix + 1] << 8) +
buf[bstart + ix]) >> ishift) & imask;
break;
case 3: /* One-bit alpha for 16 bpp */
*dsta = buf[bstart + 1] >> 7;
case 2: /* 5:5:5 BGR */
dest[0] = xlat5[(buf[bstart + 1] >> 2) & 0x1F];
dest[1] = xlat5[(((buf[bstart + 1] << 8) +
buf[bstart]) >> 5) & 0x1F];
dest[2] = xlat5[buf[bstart] & 0x1F];
break;
case 5: /* Cannot happen */
case 4: /* 5:6:5 BGR */
dest[0] = xlat5[buf[bstart + 1] >> 3];
dest[1] = xlat67[(((buf[bstart + 1] << 8) +
buf[bstart]) >> 5) & 0x3F];
dest[2] = xlat5[buf[bstart] & 0x1F];
break;
case 7: /* One-byte alpha for 32 bpp */
*dsta = buf[bstart + 3];
case 6: /* 8:8:8 BGR */
dest[0] = buf[bstart + 2];
dest[1] = buf[bstart + 1];
dest[2] = buf[bstart + 0];
break;
}
dest += xstepb;
dsta += xstep;
bstart += ibpp;
}
if (!strl || rcnt) break; /* Row end or buffer end */
}
/* Copy pixels */
if (ccnt)
{
int i, l;
l = ccnt < strl ? ccnt : strl;
ccnt -= l; strl -= l;
for (i = 0; i < l; i++ , dest += xstepb)
{
dest[0] = src[0];
if (bpp == 1) continue;
dest[1] = src[1];
dest[2] = src[2];
}
if (wmode & 1) memset(xstep < 0 ?
dsta - l + 1 : dsta, *srca, l);
dsta += xstep * l;
if (!strl || ccnt) break; /* Row end or buffer end */
}
/* Read block header */
if (bstart >= bstop) break; /* Nothing in buffer */
rcnt = buf[bstart++];
if (rcnt > 0x7F) /* Repeat block - one read + some copies */
{
ccnt = rcnt & 0x7F;
rcnt = 1;
src = dest;
srca = dsta;
}
else ++rcnt; /* Copy block - several reads */
}
if (strl) continue; /* It was buffer end */
ls_progress(settings, y, 10);
if (++y >= h) break; /* All done */
dest += ystep * bpp;
if (dsta) dsta += ystep;
strl = w;
}
/* Check if alpha channel is valid */
if (!real_alpha && settings->img[CHN_ALPHA])
{
unsigned char *tmp = settings->img[CHN_ALPHA];
int i, j = w * h, k = tmp[0];
for (i = 1; (tmp[i] == k) && (i < j); i++);
/* Delete flat "alpha" */
if (i >= j) deallocate_image(settings, CMASK_FOR(CHN_ALPHA));
}
/* Check if alpha in 16-bpp BGRA is inverse */
if (settings->img[CHN_ALPHA] && (wmode == 3) && !assoc_alpha)
{
unsigned char *timg, *talpha;
int i, j = w * h, k = 0, l;
timg = settings->img[CHN_IMAGE];
talpha = settings->img[CHN_ALPHA];
for (i = 0; i < j; i++)
{
l = 5;
if (!(timg[0] | timg[1] | timg[2])) l = 1;
else if ((timg[0] & timg[1] & timg[2]) == 255) l = 4;
k |= l << talpha[i];
if (k == 0xF) break; /* Colors independent of alpha */
timg += 3;
}
/* If 0-covered parts more colorful than 1-covered, invert alpha */
if ((k & 5) > ((k >> 1) & 5))
{
for (i = 0; i < j; i++) talpha[i] ^= 1;
}
}
/* Rescale alpha */
if (settings->img[CHN_ALPHA] && (abits < 8))
{
unsigned char *tmp = settings->img[CHN_ALPHA];
int i, j = w * h;
set_xlate(xlat67, abits);
for (i = 0; i < j; i++) tmp[i] = xlat67[tmp[i]];
}
/* Unassociate alpha */
if (settings->img[CHN_ALPHA] && assoc_alpha && (abits > 1))
{
mem_demultiply(settings->img[CHN_IMAGE],
settings->img[CHN_ALPHA], w * h, bpp);
}
res = 0;
/* Apply palette transparency */
if (itrans) res = palette_trans(settings, trans);
if (!res) res = 1;
fail3: if (!settings->silent) progress_end();
fail2: free(buf);
fail: fclose(fp);
return (res);
}
static int save_tga(char *file_name, ls_settings *settings)
{
unsigned char hdr[TGA_HSIZE], ftr[TGA_FSIZE], pal[256 * 4];
unsigned char *buf, *src, *srca, *dest;
FILE *fp;
int i, j, y0, y1, vstep, pcn, pbpp = 3;
int w = settings->width, h = settings->height, bpp = settings->bpp;
int rle = settings->tga_RLE;
/* Indexed images not supposed to have alpha in TGA standard */
if ((bpp == 3) && settings->img[CHN_ALPHA]) bpp = 4;
i = w * bpp;
if (rle) i += i + (w >> 7) + 3;
buf = malloc(i);
if (!buf) return -1;
if (!(fp = fopen(file_name, "wb")))
{
free(buf);
return -1;
}
/* Prepare header */
memset(hdr, 0, TGA_HSIZE);
switch (bpp)
{
case 1: /* Indexed */
hdr[TGA_PALTYPE] = 1;
hdr[TGA_IMGTYPE] = 1;
PUT16(hdr + TGA_PALCOUNT, settings->colors);
if ((settings->xpm_trans >= 0) &&
(settings->xpm_trans < settings->colors)) pbpp = 4;
hdr[TGA_PALBITS] = pbpp * 8;
break;
case 4: /* RGBA */
hdr[TGA_DESC] = 8;
case 3: /* RGB */
hdr[TGA_IMGTYPE] = 2;
break;
}
hdr[TGA_BPP] = bpp * 8;
PUT16(hdr + TGA_WIDTH, w);
PUT16(hdr + TGA_HEIGHT, h);
if (rle) hdr[TGA_IMGTYPE] |= 8;
if (!tga_defdir) hdr[TGA_DESC] |= TGA_T2B;
fwrite(hdr, 1, TGA_HSIZE, fp);
/* Write palette */
if (bpp == 1)
{
dest = pal;
for (i = 0; i < settings->colors; i++ , dest += pbpp)
{
dest[0] = settings->pal[i].blue;
dest[1] = settings->pal[i].green;
dest[2] = settings->pal[i].red;
if (pbpp > 3) dest[3] = 255;
}
/* Mark transparent color */
if (pbpp > 3) pal[settings->xpm_trans * 4 + 3] = 0;
fwrite(pal, 1, dest - pal, fp);
}
/* Write rows */
if (!settings->silent) ls_init("TGA", 1);
if (tga_defdir)
{
y0 = h - 1; y1 = -1; vstep = -1;
}
else
{
y0 = 0; y1 = h; vstep = 1;
}
for (i = y0 , pcn = 0; i != y1; i += vstep , pcn++)
{
prepare_row(buf, settings, bpp, i); /* Fill uncompressed row */
src = buf;
dest = buf + w * bpp;
if (rle) /* Compress */
{
unsigned char *tmp;
int k, l;
for (j = 1; j <= w; j++)
{
tmp = srca = src;
src += bpp;
/* Scan row for repeats */
for (; j < w; j++ , src += bpp)
{
switch (bpp)
{
case 4: if (src[3] != srca[3]) break;
case 3: if (src[2] != srca[2]) break;
case 2: if (src[1] != srca[1]) break;
case 1: if (src[0] != srca[0]) break;
default: continue;
}
/* Useful repeat? */
if (src - srca > bpp + 2) break;
srca = src;
}
/* Avoid too-short repeats at row ends */
if (src - srca <= bpp + 2) srca = src;
/* Create copy blocks */
for (k = (srca - tmp) / bpp; k > 0; k -= 128)
{
l = k > 128 ? 128 : k;
*dest++ = l - 1;
memcpy(dest, tmp, l *= bpp);
dest += l; tmp += l;
}
/* Create repeat blocks */
for (k = (src - srca) / bpp; k > 0; k -= 128)
{
l = k > 128 ? 128 : k;
*dest++ = l + 127;
memcpy(dest, srca, bpp);
dest += bpp;
}
}
}
fwrite(src, 1, dest - src, fp);
ls_progress(settings, pcn, 20);
}
/* Write footer */
memcpy(ftr + TGA_SIGN, "TRUEVISION-XFILE.", TGA_FSIZE - TGA_SIGN);
/* !!! No private extensions for now */
memset(ftr, 0, TGA_SIGN);
fwrite(ftr, 1, TGA_FSIZE, fp);
fclose(fp);
if (!settings->silent) progress_end();
free(buf);
return 0;
}
/* PCX header */
#define PCX_ID 0 /* 8b */
#define PCX_VER 1 /* 8b */
#define PCX_ENC 2 /* 8b */
#define PCX_BPP 3 /* 8b */
#define PCX_X0 4 /* 16b */
#define PCX_Y0 6 /* 16b */
#define PCX_X1 8 /* 16b */
#define PCX_Y1 10 /* 16b */
#define PCX_HDPI 12 /* 16b */
#define PCX_VDPI 14 /* 16b */
#define PCX_PAL 16 /* 8b*3*16 */
#define PCX_NPLANES 65 /* 8b */
#define PCX_LINELEN 66 /* 16b */
#define PCX_PALTYPE 68 /* 16b */
#define PCX_HRES 70 /* 16b */
#define PCX_VRES 72 /* 16b */
#define PCX_HSIZE 128
#define PCX_BUFSIZE 16384 /* Bytes read at a time */
/* Default EGA/VGA palette */
static const png_color def_pal[16] = {
{0x00, 0x00, 0x00}, {0x00, 0x00, 0xAA}, {0x00, 0xAA, 0x00}, {0x00, 0xAA, 0xAA},
{0xAA, 0x00, 0x00}, {0xAA, 0x00, 0xAA}, {0xAA, 0x55, 0x00}, {0xAA, 0xAA, 0xAA},
{0x55, 0x55, 0x55}, {0x55, 0x55, 0xFF}, {0x55, 0xFF, 0x55}, {0x55, 0xFF, 0xFF},
{0xFF, 0x55, 0x55}, {0xFF, 0x55, 0xFF}, {0xFF, 0xFF, 0x55}, {0xFF, 0xFF, 0xFF},
};
static void copy_rgb_pal(png_color *dest, unsigned char *src, int cnt)
{
while (cnt-- > 0)
{
dest->red = src[0];
dest->green = src[1];
dest->blue = src[2];
dest++; src += 3;
}
}
static int load_pcx(char *file_name, ls_settings *settings)
{
static const unsigned char planarconfig[8] = {
0x11, /* BW */ 0x12, /* 4c */ 0x31, /* 8c */
0x41, /* 16c */ 0x14, /* 16c */ 0x18, /* 256c */
0x38, /* RGB */ 0x48 /* RGBA */ };
unsigned char hdr[PCX_HSIZE], pbuf[769];
unsigned char *buf, *row, *dest, *tmp;
FILE *fp;
int ver, bits, planes, ftype;
int y, ccnt, bstart, bstop, strl, plane;
int w, h, cols, buflen, bpp = 3, res = -1;
if (!(fp = fopen(file_name, "rb"))) return (-1);
/* Read the header */
if (fread(hdr, 1, PCX_HSIZE, fp) < PCX_HSIZE) goto fail;
/* PCX has no real signature - so check fields one by one */
if ((hdr[PCX_ID] != 10) || (hdr[PCX_ENC] != 1)) goto fail;
ver = hdr[PCX_VER];
if (ver > 5) goto fail;
bits = hdr[PCX_BPP];
planes = hdr[PCX_NPLANES];
if ((bits | planes) > 15) goto fail;
if (!(tmp = memchr(planarconfig, (planes << 4) | bits, 8))) goto fail;
ftype = tmp - planarconfig;
/* Prepare palette */
if (ftype < 6)
{
bpp = 1;
settings->colors = cols = 1 << (bits * planes);
/* BW (0 is black) */
if (cols == 2)
{
settings->pal[0] = def_pal[0];
settings->pal[1] = def_pal[15];
}
/* Default 256-color palette - assumed greyscale */
else if ((ver == 3) && (cols == 256)) set_gray(settings);
/* Default 16-color palette */
else if ((ver == 3) && (cols == 16))
memcpy(settings->pal, def_pal, sizeof(def_pal));
/* !!! CGA palette is evil: what the PCX spec describes is the way it
* was handled by PC Paintbrush 3.0, while 4.0 was using an entirely
* different, undocumented encoding for palette selection.
* The only seemingly sane way to differentiate the two is to look at
* paletteinfo field: zeroed in 3.0, set in 4.0+ - WJ */
else if (cols == 4)
{
/* Bits 2:1:0 in index: color burst:palette:intensity */
static const unsigned char cga_pals[8 * 3] = {
2, 4, 6, 10, 12, 14,
3, 5, 7, 11, 13, 15,
3, 4, 7, 11, 12, 15,
3, 4, 7, 11, 12, 15 };
int i, idx = hdr[PCX_PAL + 3] >> 5; // PB 3.0
if (GET16(hdr + PCX_PALTYPE)) // PB 4.0
{
/* Pick green palette if G>B in slot 1 */
i = hdr[PCX_PAL + 5] >= hdr[PCX_PAL + 4];
/* Pick bright palette if max(G,B) > 200 */
idx = i * 2 + (hdr[PCX_PAL + 4 + i] > 200);
}
settings->pal[0] = def_pal[hdr[PCX_PAL] >> 4];
for (i = 1 , idx *= 3; i < 4; i++)
settings->pal[i] = def_pal[cga_pals[idx++]];
}
/* VGA palette - read from file */
else if (cols == 256)
{
if ((fseek(fp, -769, SEEK_END) < 0) ||
(fread(pbuf, 1, 769, fp) < 769) ||
(pbuf[0] != 0x0C)) goto fail;
copy_rgb_pal(settings->pal, pbuf + 1, 256);
}
/* 8 or 16 colors - read from header */
else copy_rgb_pal(settings->pal, hdr + PCX_PAL, cols);
/* If palette is all we need */
res = 1;
if ((settings->mode == FS_PALETTE_LOAD) ||
(settings->mode == FS_PALETTE_DEF)) goto fail;
}
/* Allocate buffer and image */
settings->width = w = GET16(hdr + PCX_X1) - GET16(hdr + PCX_X0) + 1;
settings->height = h = GET16(hdr + PCX_Y1) - GET16(hdr + PCX_Y0) + 1;
settings->bpp = bpp;
buflen = GET16(hdr + PCX_LINELEN);
res = -1;
if (buflen < ((w * bits + 7) >> 3)) goto fail;
/* To accommodate bitparser's extra step */
buf = malloc(PCX_BUFSIZE + buflen + 1);
res = FILE_MEM_ERROR;
if (!buf) goto fail;
row = buf + PCX_BUFSIZE;
if ((res = allocate_image(settings, ftype > 6 ? CMASK_RGBA : CMASK_IMAGE)))
goto fail2;
/* Read and decode the file */
if (!settings->silent) ls_init("PCX", 0);
res = FILE_LIB_ERROR;
fseek(fp, PCX_HSIZE, SEEK_SET);
dest = settings->img[CHN_IMAGE];
if (bits == 1) memset(dest, 0, w * h); // Write will be by OR
y = plane = ccnt = 0;
bstart = bstop = PCX_BUFSIZE;
strl = buflen;
while (TRUE)
{
unsigned char v;
/* Keep the buffer filled */
if (bstart >= bstop)
{
bstart -= bstop;
bstop = fread(buf, 1, PCX_BUFSIZE, fp);
if (bstop <= bstart) goto fail3; /* Truncated file */
}
/* Decode data */
v = buf[bstart];
if (ccnt) /* Middle of a run */
{
int l = strl < ccnt ? strl : ccnt;
memset(row + buflen - strl, v, l);
strl -= l; ccnt -= l;
}
else if (v >= 0xC0) /* Start of a run */
{
ccnt = v & 0x3F;
bstart++;
}
else row[buflen - strl--] = v;
bstart += !ccnt;
if (strl) continue;
/* Store a line */
if (bits == 1) // N planes of 1-bit data (MSB first)
{
unsigned char uninit_(v), *tmp = row;
int i, n = 7 - plane;
for (i = 0; i < w; i++ , v += v)
{
if (!(i & 7)) v = *tmp++;
dest[i] |= (v & 0x80) >> n;
}
}
else if (plane < 3) // BPP planes of 2/4/8-bit data (MSB first)
stream_MSB(row, dest + plane, w, bits, 0, bits, bpp);
else if (settings->img[CHN_ALPHA]) // 8-bit alpha plane
memcpy(settings->img[CHN_ALPHA] + y * w, row, w);
if (++plane >= planes)
{
ls_progress(settings, y, 10);
if (++y >= h) break;
dest += w * bpp;
plane = 0;
}
strl = buflen;
}
res = 1;
fail3: if (!settings->silent) progress_end();
fail2: free(buf);
fail: fclose(fp);
return (res);
}
static int save_pcx(char *file_name, ls_settings *settings)
{
unsigned char *buf, *src, *dest;
FILE *fp;
int w = settings->width, h = settings->height, bpp = settings->bpp;
int i, l, plane, cnt;
/* Allocate buffer */
i = w * 2; // Buffer one plane, with worst-case RLE expansion factor 2
if (i < PCX_HSIZE) i = PCX_HSIZE;
if (i < 769) i = 769; // For palette
buf = calloc(1, i); // Zeroing out is for header
if (!buf) return (-1);
if (!(fp = fopen(file_name, "wb")))
{
free(buf);
return (-1);
}
/* Prepare header */
memcpy(buf, "\x0A\x05\x01\x08", 4); // Version 5 PCX, 8 bits/plane
PUT16(buf + PCX_X1, w - 1);
PUT16(buf + PCX_Y1, h - 1);
PUT16(buf + PCX_HDPI, 300); // GIMP sets DPI to this value
PUT16(buf + PCX_VDPI, 300);
buf[PCX_NPLANES] = bpp;
PUT16(buf + PCX_LINELEN, w);
buf[PCX_PALTYPE] = 1;
fwrite(buf, 1, PCX_HSIZE, fp);
/* Compress & write pixel rows */
if (!settings->silent) ls_init("PCX", 1);
src = settings->img[CHN_IMAGE];
for (i = 0; i < h; i++ , src += w * bpp)
{
for (plane = 0; plane < bpp; plane++)
{
unsigned char v, *tmp = src + plane;
dest = buf; cnt = 0; l = w;
while (l > 0)
{
v = *tmp; tmp += bpp; cnt++;
if ((--l <= 0) || (cnt == 0x3F) || (v != *tmp))
{
if ((cnt > 1) || (v >= 0xC0))
*dest++ = cnt | 0xC0;
*dest++ = v; cnt = 0;
}
}
fwrite(buf, 1, dest - buf, fp);
}
ls_progress(settings, i, 20);
}
/* Write palette */
if (bpp == 1)
{
png_color *col = settings->pal;
memset(dest = buf + 1, 0, 768);
buf[0] = 0x0C;
for (i = 0; i < settings->colors; i++ , dest += 3 , col++)
{
dest[0] = col->red;
dest[1] = col->green;
dest[2] = col->blue;
}
fwrite(buf, 1, 769, fp);
}
fclose(fp);
if (!settings->silent) progress_end();
free(buf);
return (0);
}
typedef void (*cvt_func)(unsigned char *dest, unsigned char *src, int len,
int bpp, int step, int maxval);
static void convert_16b(unsigned char *dest, unsigned char *src, int len,
int bpp, int step, int maxval)
{
int i, v, m = maxval * 2;
if (!(step -= bpp)) bpp *= len , len = 1;
step *= 2;
while (len-- > 0)
{
i = bpp;
while (i--)
{
v = (src[0] << 8) + src[1];
src += 2;
*dest++ = (v * (255 * 2) + maxval) / m;
}
src += step;
}
}
static void copy_bytes(unsigned char *dest, unsigned char *src, int len,
int bpp, int step, int maxval)
{
int i;
if (!(step -= bpp)) bpp *= len , len = 1;
while (len-- > 0)
{
i = bpp;
while (i--) *dest++ = *src++;
src += step;
}
}
static void extend_bytes(unsigned char *dest, int len, int maxval)
{
unsigned char tb[256];
int i, j, m = maxval * 2;
memset(tb, 255, 256);
for (i = 0 , j = maxval; i <= maxval; i++ , j += 255 * 2)
tb[i] = j / m;
for (j = 0; j < len; j++ , dest++) *dest = tb[*dest];
}
static int check_next_pnm(FILE *fp, char id)
{
char buf[2];
if (fread(buf, 2, 1, fp))
{
fseek(fp, -2, SEEK_CUR);
if ((buf[0] == 'P') && (buf[1] == id)) return (FILE_HAS_FRAMES);
}
return (1);
}
/* PAM loader does not support nonstandard types "GRAYSCALEFP" and "RGBFP",
* because handling format variations which aren't found in the wild
* is a waste of code - WJ */
static int load_pam_frame(FILE *fp, ls_settings *settings)
{
static const char *typenames[] = {
"BLACKANDWHITE", "BLACKANDWHITE_ALPHA",
"GRAYSCALE", "GRAYSCALE_ALPHA",
"RGB", "RGB_ALPHA",
"CMYK", "CMYK_ALPHA" };
static const char depths[] = { 1, 2, 1, 2, 3, 4, 4, 5 };
cvt_func cvt_stream;
char wbuf[512], *t1, *t2, *tail;
unsigned char *dest, *buf = NULL;
int maxval = 0, w = 0, h = 0, depth = 0, ftype = -1;
int i, j, l, ll, bpp, trans, vl, res;
/* Read header */
if (!fgets(wbuf, sizeof(wbuf), fp) || strncmp(wbuf, "P7", 2))
return (-1);
while (TRUE)
{
if (!fgets(wbuf, sizeof(wbuf), fp)) return (-1);
if (!wbuf[0] || (wbuf[0] == '#')) continue; // Empty line or comment
t2 = NULL;
t1 = wbuf + strspn(wbuf, WHITESPACE);
l = strcspn(t1, WHITESPACE);
if (t1[l])
{
t2 = t1 + l + strspn(t1 + l, WHITESPACE);
t2[strcspn(t2, WHITESPACE)] = '\0';
}
t1[l] = '\0';
if (!strcmp(t1, "ENDHDR")) break;
if (!strcmp(t1, "TUPLTYPE"))
{
if (!t2) continue;
for (i = 1; typenames[i]; i++)
{
if (strcmp(t2, typenames[i])) continue;
ftype = i;
break;
}
continue;
}
if (!t2) return (-1); // Failure - other fields are numeric
i = strtol(t2, &tail, 10);
if (*tail) return (-1);
if (!strcmp(t1, "HEIGHT")) h = i;
else if (!strcmp(t1, "WIDTH")) w = i;
else if (!strcmp(t1, "DEPTH")) depth = i;
else if (!strcmp(t1, "MAXVAL")) maxval = i;
else return (-1); // Unknown IDs not allowed
}
/* Interpret unknown content as RGB or grayscale */
if (ftype < 0) ftype = depth >= 3 ? 4 : 2;
/* Validate */
if ((depth < depths[ftype]) || (depth > 16) ||
(maxval < 1) || (maxval > 65535)) return (-1);
bpp = ftype < 4 ? 1 : 3;
trans = ftype & 1;
vl = maxval < 256 ? 1 : 2;
ll = w * depth * vl;
if (ftype < 2) // BW
{
set_bw(settings);
if (maxval > 1) return (-1);
}
else if (bpp == 1) set_gray(settings); // Grayscale
/* Allocate row buffer if cannot read directly into image */
if (trans || (vl > 1) || (bpp != depth))
{
buf = malloc(ll);
if (!buf) return (FILE_MEM_ERROR);
}
/* Allocate image */
settings->width = w;
settings->height = h;
settings->bpp = bpp;
res = allocate_image(settings, trans ? CMASK_RGBA : CMASK_IMAGE);
if (res) goto fail;
/* Read the image */
if (!settings->silent) ls_init("PAM", 0);
res = FILE_LIB_ERROR;
cvt_stream = vl > 1 ? convert_16b : copy_bytes;
for (i = 0; i < h; i++)
{
dest = buf ? buf : settings->img[CHN_IMAGE] + ll * i;
j = fread(dest, 1, ll, fp);
if (j < ll) goto fail2;
ls_progress(settings, i, 10);
if (!buf) continue; // Nothing else to do here
if (settings->img[CHN_ALPHA]) // Have alpha - parse it
{
cvt_stream(settings->img[CHN_ALPHA] + w * i,
buf + depths[ftype] * vl - vl, w, 1, depth, maxval);
}
dest = settings->img[CHN_IMAGE] + w * bpp * i;
if (ftype >= 6) // CMYK
{
cvt_stream(buf, buf, w, 4, depth, maxval);
if (maxval < 255) extend_bytes(buf, w * 4, maxval);
cmyk2rgb(dest, buf, w, FALSE, settings);
}
else cvt_stream(dest, buf, w, bpp, depth, maxval);
}
/* Check for next frame */
res = check_next_pnm(fp, '7');
fail2: if (maxval < 255) // Extend what we've read
{
j = w * h;
if (settings->img[CHN_ALPHA])
extend_bytes(settings->img[CHN_ALPHA], j, maxval);
j *= bpp;
dest = settings->img[CHN_IMAGE];
if (ftype >= 6); // CMYK is done already
else if (ftype > 1) extend_bytes(dest, j, maxval);
else // Convert BW from 1-is-white to 1-is-black
{
for (i = 0; i < j; i++ , dest++) *dest = !*dest;
}
}
if (!settings->silent) progress_end();
fail: free(buf);
return (res);
}
#define PNM_BUFSIZE 4096
typedef struct {
FILE *f;
int ptr, end, eof, comment;
char buf[PNM_BUFSIZE + 2];
} pnmbuf;
/* What PBM documentation says is NOT what Netpbm actually does; skipping a
* comment in file header, it does not consume the newline after it - WJ */
static void pnm_skip_comment(pnmbuf *pnm)
{
pnm->comment = !pnm->buf[pnm->ptr += strcspn(pnm->buf + pnm->ptr, "\r\n")];
}
static char *pnm_gets(pnmbuf *pnm, int data)
{
int k, l;
while (TRUE)
{
while (pnm->ptr < pnm->end)
{
l = pnm->ptr + strspn(pnm->buf + pnm->ptr, WHITESPACE);
if (pnm->buf[l] == '#')
{
if (data) return (NULL);
pnm->ptr = l;
pnm_skip_comment(pnm);
continue;
}
k = l + strcspn(pnm->buf + l, WHITESPACE "#");
if (pnm->buf[k] || pnm->eof)
{
pnm->ptr = k + 1;
if (pnm->buf[k] == '#')
{
if (data) return (NULL);
pnm_skip_comment(pnm);
}
pnm->buf[k] = '\0';
return (pnm->buf + l);
}
memmove(pnm->buf, pnm->buf + l, pnm->end -= l);
pnm->ptr = 0;
break;
}
if (pnm->eof) return (NULL);
if (pnm->ptr >= pnm->end) pnm->ptr = pnm->end = 0;
l = PNM_BUFSIZE - pnm->end;
if (l <= 0) return (NULL); // A "token" of 4096 chars means failure
pnm->end += k = fread(pnm->buf + pnm->end, 1, l, pnm->f);
pnm->eof = k < l;
if (pnm->comment) pnm_skip_comment(pnm);
}
}
static int pnm_endhdr(pnmbuf *pnm, int plain)
{
while (pnm->comment)
{
pnm_skip_comment(pnm);
if (!pnm->comment) break;
if (pnm->eof) return (FALSE);
pnm->end = fread(pnm->buf, 1, PNM_BUFSIZE, pnm->f);
pnm->eof = pnm->end < PNM_BUFSIZE;
}
/* Last whitespace in header already got consumed while parsing */
/* Buffer will remain in use in plain mode */
if (!plain && (pnm->ptr < pnm->end))
fseek(pnm->f, pnm->ptr - pnm->end, SEEK_CUR);
return (TRUE);
}
static int load_pnm_frame(FILE *fp, ls_settings *settings)
{
pnmbuf pnm;
char *s, *tail;
unsigned char *dest;
int i, l, m, w, h, bpp, maxval, plain, mode, fid, res;
/* Identify*/
memset(&pnm, 0, sizeof(pnm));
pnm.f = fp;
fid = settings->ftype == FT_PBM ? 0 : settings->ftype == FT_PGM ? 1 : 2;
if (!(s = pnm_gets(&pnm, FALSE))) return (-1);
if ((s[0] != 'P') || ((s[1] != fid + '1') && (s[1] != fid + '4')))
return (-1);
plain = s[1] < '4';
/* Read header */
if (!(s = pnm_gets(&pnm, FALSE))) return (-1);
w = strtol(s, &tail, 10);
if (*tail) return (-1);
if (!(s = pnm_gets(&pnm, FALSE))) return (-1);
h = strtol(s, &tail, 10);
if (*tail) return (-1);
bpp = maxval = 1;
if (settings->ftype == FT_PBM) set_bw(settings);
else
{
if (!(s = pnm_gets(&pnm, FALSE))) return (-1);
maxval = strtol(s, &tail, 10);
if (*tail) return (-1);
if ((maxval <= 0) || (maxval > 65535)) return (-1);
if (settings->ftype == FT_PGM) set_gray(settings);
else bpp = 3;
}
if (!pnm_endhdr(&pnm, plain)) return (-1);
/* Store values */
settings->width = w;
settings->height = h;
settings->bpp = bpp;
/* Allocate image */
if ((res = allocate_image(settings, CMASK_IMAGE))) return (res);
/* Now, read the image */
mode = settings->ftype == FT_PBM ? plain /* 0 and 1 */ :
plain ? 2 : maxval < 255 ? 3 : maxval > 255 ? 4 : 5;
s = "";
if (!settings->silent) ls_init("PNM", 0);
res = FILE_LIB_ERROR;
l = w * bpp;
m = maxval * 2;
for (i = 0; i < h; i++)
{
dest = settings->img[CHN_IMAGE] + l * i;
switch (mode)
{
case 0: /* Raw packed bits */
{
#if PNM_BUFSIZE * 8 < MAX_WIDTH
#error "Buffer too small to read PBM row all at once"
#endif
int i, j, k;
unsigned char *tp = pnm.buf;
k = (w + 7) >> 3;
j = fread(tp, 1, k, fp);
for (i = 0; i < w; i++)
*dest++ = (tp[i >> 3] >> (~i & 7)) & 1;
if (j < k) goto fail2;
break;
}
case 3: /* Raw byte values - extend later */
case 5: /* Raw 0..255 values - trivial */
if (fread(dest, 1, l, fp) < l) goto fail2;
break;
case 1: /* Chars "0" and "1" */
{
int i;
unsigned char ch;
for (i = 0; i < l; i++)
{
if (!s[0] && !(s = pnm_gets(&pnm, TRUE)))
goto fail2;
ch = *s++ - '0';
if (ch > 1) goto fail2;
*dest++ = ch;
}
break;
}
case 2: /* Integers in ASCII */
{
int i, n;
for (i = 0; i < l; i++)
{
if (!(s = pnm_gets(&pnm, TRUE))) goto fail2;
n = strtol(s, &tail, 10);
if (*tail) goto fail2;
if ((n < 0) || (n > maxval)) goto fail2;
n = (n * (255 * 2) + maxval) / m;
*dest++ = n;
}
break;
}
case 4: /* Raw ushorts in MSB order */
{
int i, j, k, ll;
for (ll = l * 2; ll > 0; ll -= k)
{
k = PNM_BUFSIZE < ll ? PNM_BUFSIZE : ll;
j = fread(pnm.buf, 1, k, fp);
i = j >> 1;
convert_16b(dest, pnm.buf, i, 1, 1, maxval);
dest += i;
if (j < k) goto fail2;
}
break;
}
}
ls_progress(settings, i, 10);
}
res = 1;
/* Check for next frame */
if (!plain) res = check_next_pnm(fp, fid + '4');
fail2: if (mode == 3) // Extend what we've read
extend_bytes(settings->img[CHN_IMAGE], l * h, maxval);
if (!settings->silent) progress_end();
return (res);
}
static int load_pnm_frames(char *file_name, ani_settings *ani)
{
FILE *fp;
ls_settings w_set;
int res, is_pam = ani->settings.ftype == FT_PAM, next = TRUE;
if (!(fp = fopen(file_name, "rb"))) return (-1);
while (next)
{
res = FILE_TOO_LONG;
if (!check_next_frame(&ani->fset, ani->settings.mode, FALSE))
goto fail;
w_set = ani->settings;
res = (is_pam ? load_pam_frame : load_pnm_frame)(fp, &w_set);
next = res == FILE_HAS_FRAMES;
if ((res != 1) && !next) goto fail;
res = process_page_frame(file_name, ani, &w_set);
if (res) goto fail;
}
res = 1;
fail: fclose(fp);
return (res);
}
static int load_pnm(char *file_name, ls_settings *settings)
{
FILE *fp;
int res;
if (!(fp = fopen(file_name, "rb"))) return (-1);
res = (settings->ftype == FT_PAM ? load_pam_frame :
load_pnm_frame)(fp, settings);
fclose(fp);
return (res);
}
static int save_pbm(char *file_name, ls_settings *settings)
{
unsigned char buf[MAX_WIDTH / 8], *src;
FILE *fp;
int i, j, l, w = settings->width, h = settings->height;
if ((settings->bpp != 1) || (settings->colors > 2)) return WRONG_FORMAT;
if (!(fp = fopen(file_name, "wb"))) return (-1);
if (!settings->silent) ls_init("PBM", 1);
fprintf(fp, "P4\n%d %d\n", w, h);
/* Write rows */
src = settings->img[CHN_IMAGE];
l = (w + 7) >> 3;
for (i = 0; i < h; i++)
{
memset(buf, 0, l);
for (j = 0; j < w; j++)
buf[j >> 3] |= (*src++ == 1) << (~j & 7);
fwrite(buf, l, 1, fp);
ls_progress(settings, i, 20);
}
fclose(fp);
if (!settings->silent) progress_end();
return (0);
}
static int save_ppm(char *file_name, ls_settings *settings)
{
FILE *fp;
int i, l, m, w = settings->width, h = settings->height;
if (settings->bpp != 3) return WRONG_FORMAT;
if (!(fp = fopen(file_name, "wb"))) return (-1);
if (!settings->silent) ls_init("PPM", 1);
fprintf(fp, "P6\n%d %d\n255\n", w, h);
/* Write rows */
m = (l = w * 3) * h;
// Write entire file at once if no progressbar
if (settings->silent) l = m;
for (i = 0; m > 0; m -= l , i++)
{
fwrite(settings->img[CHN_IMAGE] + l * i, l, 1, fp);
ls_progress(settings, i, 20);
}
fclose(fp);
if (!settings->silent) progress_end();
return (0);
}
static int save_pam(char *file_name, ls_settings *settings)
{
unsigned char xv, xa, *dest, *src, *srca, *buf = NULL;
FILE *fp;
int ibpp = settings->bpp, w = settings->width, h = settings->height;
int i, j, bpp;
if ((ibpp != 3) && (settings->colors > 2)) return WRONG_FORMAT;
bpp = ibpp + !!settings->img[CHN_ALPHA];
/* For BW: image XOR 1, alpha AND 1 */
xa = (xv = ibpp == 1) ? 1 : 255;
if (bpp != 3) // BW needs inversion, and alpha, interlacing
{
buf = malloc(w * bpp);
if (!buf) return (-1);
}
if (!(fp = fopen(file_name, "wb")))
{
free(buf);
return (-1);
}
if (!settings->silent) ls_init("PAM", 1);
fprintf(fp, "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\n"
"TUPLTYPE %s%s\nENDHDR\n", w, h, bpp, ibpp == 1 ? 1 : 255,
ibpp == 1 ? "BLACKANDWHITE" : "RGB", bpp > ibpp ? "_ALPHA" : "");
for (i = 0; i < h; i++)
{
src = settings->img[CHN_IMAGE] + i * w * ibpp;
if ((dest = buf))
{
srca = NULL;
if (settings->img[CHN_ALPHA])
srca = settings->img[CHN_ALPHA] + i * w;
for (j = 0; j < w; j++)
{
*dest++ = *src++ ^ xv;
if (ibpp > 1)
{
*dest++ = *src++;
*dest++ = *src++;
}
if (srca) *dest++ = *srca++ & xa;
}
src = buf;
}
fwrite(src, 1, w * bpp, fp);
ls_progress(settings, i, 20);
}
fclose(fp);
if (!settings->silent) progress_end();
free(buf);
return (0);
}
/* Put screenshots and X pixmaps on an equal footing with regular files */
#if (GTK_MAJOR_VERSION == 1) || defined GDK_WINDOWING_X11
#include <X11/Xlib.h>
#include <gdk/gdkx.h>
/* It's unclear who should free clipboard pixmaps and when, so I do the same
* thing Qt does, destroying the next-to-last allocated pixmap each time a new
* one is allocated - WJ */
static int save_pixmap(ls_settings *settings, memFILE *mf)
{
static GdkPixmap *exported[2];
unsigned char *src, *dest, *sel, *buf = NULL;
int i, j, l, w = settings->width, h = settings->height;
/* !!! Pixmap export used only for FS_CLIPBOARD, where the case of
* selection without alpha is already prevented */
if ((settings->bpp == 1) || settings->img[CHN_ALPHA])
{
buf = malloc(w * 3);
if (!buf) return (-1);
}
if (exported[0])
{
if (exported[1])
{
/* Someone might have destroyed the X pixmap already,
* so get ready to live through an X error */
gdk_error_trap_push();
gdk_pixmap_unref(exported[1]);
gdk_error_trap_pop();
}
exported[1] = exported[0];
}
exported[0] = gdk_pixmap_new(main_window->window, w, h, -1);
if (!exported[0])
{
free(buf);
return (-1);
}
/* Plain RGB - copy it whole */
if (!buf) gdk_draw_rgb_image(exported[0], main_window->style->black_gc,
0, 0, w, h, GDK_RGB_DITHER_NONE, settings->img[CHN_IMAGE], w * 3);
/* Something else - render & copy row by row */
else
{
l = w * settings->bpp;
for (i = 0; i < h; i++)
{
src = settings->img[CHN_IMAGE] + l * i;
dest = buf;
if (settings->bpp == 3) memcpy(dest, src, l);
else /* Indexed to RGB */
{
png_color *pal = settings->pal;
for (j = 0; j < w; j++ , dest += 3)
{
png_color *col = pal + *src++;
dest[0] = col->red;
dest[1] = col->green;
dest[2] = col->blue;
}
}
/* There is no way to send alpha to XPaint, so I use
* alpha (and selection if any) to blend image with
* white and send the result - WJ */
if (settings->img[CHN_ALPHA])
{
src = settings->img[CHN_ALPHA] + w * i;
sel = settings->img[CHN_SEL] ?
settings->img[CHN_SEL] + w * i : NULL;
dest = buf;
for (j = 0; j < w; j++)
{
int ii, jj, k = *src++;
if (sel)
{
k *= *sel++;
k = (k + (k >> 8) + 1) >> 8;
}
for (ii = 0; ii < 3; ii++)
{
jj = 255 * 255 + (*dest - 255) * k;
*dest++ = (jj + (jj >> 8) + 1) >> 8;
}
}
}
gdk_draw_rgb_image(exported[0], main_window->style->black_gc,
0, i, w, 1, GDK_RGB_DITHER_NONE, buf, w * 3);
}
}
free(buf);
/* !!! '(void *)' is there to make GCC 4 shut up - WJ */
*(Pixmap *)(void *)&mf->buf = GDK_WINDOW_XWINDOW(exported[0]);
mf->top = sizeof(Pixmap);
return (0);
}
#else /* Pixmap export fails by definition in absence of X */
#define save_pixmap(A,B) (-1)
#endif
static int load_pixmap(char *pixmap_id, ls_settings *settings)
{
#if GTK_MAJOR_VERSION == 1
GdkWindow *mainwin = (GdkWindow *)&gdk_root_parent;
#else /* #if GTK_MAJOR_VERSION == 2 */
GdkWindow *mainwin = gdk_get_default_root_window();
#endif
int w, h, res = -1;
if (pixmap_id) // Pixmap by ID
{
/* This ugly code imports X Window System's pixmaps; this allows mtPaint to
* receive images from programs such as XPaint */
#if (GTK_MAJOR_VERSION == 1) || defined GDK_WINDOWING_X11
GdkPixmap *pm;
int d, dd;
gdk_error_trap_push(); // No guarantee that we got a valid pixmap
pm = gdk_pixmap_foreign_new(*(Pixmap *)pixmap_id);
gdk_error_trap_pop(); // The above call returns NULL on failure anyway
if (!pm) return (-1);
dd = gdk_visual_get_system()->depth;
#if GTK_MAJOR_VERSION == 1
gdk_window_get_geometry(pm, NULL, NULL, &w, &h, &d);
#else /* #if GTK_MAJOR_VERSION == 2 */
gdk_drawable_get_size(pm, &w, &h);
d = gdk_drawable_get_depth(pm);
#endif
settings->width = w;
settings->height = h;
settings->bpp = 3;
if ((d == 1) || (d == dd))
res = allocate_image(settings, CMASK_IMAGE);
if (!res) res = wj_get_rgb_image(d == 1 ? NULL : mainwin, pm,
settings->img[CHN_IMAGE], 0, 0, w, h) ? 1 : -1;
#if GTK_MAJOR_VERSION == 1
/* Don't let gdk_pixmap_unref() destroy another process's pixmap -
* implement freeing the GdkPixmap structure here instead */
gdk_xid_table_remove(((GdkWindowPrivate *)pm)->xwindow);
g_dataset_destroy(pm);
g_free(pm);
#else /* #if GTK_MAJOR_VERSION == 2 */
gdk_pixmap_unref(pm);
#endif
#endif
}
else // NULL means a screenshot
{
w = settings->width = gdk_screen_width();
h = settings->height = gdk_screen_height();
settings->bpp = 3;
res = allocate_image(settings, CMASK_IMAGE);
if (!res) res = wj_get_rgb_image(mainwin, NULL,
settings->img[CHN_IMAGE], 0, 0, w, h) ? 1 : -1;
}
return (res);
}
/* Handle SVG import using gdk-pixbuf */
#if (GDK_PIXBUF_MAJOR > 2) || ((GDK_PIXBUF_MAJOR == 2) && (GDK_PIXBUF_MINOR >= 4))
#define MAY_HANDLE_SVG
static int svg_ftype = -1;
static int svg_supported()
{
GSList *tmp, *ff;
int i, res = FALSE;
ff = gdk_pixbuf_get_formats();
for (tmp = ff; tmp; tmp = tmp->next)
{
gchar **mime = gdk_pixbuf_format_get_mime_types(tmp->data);
for (i = 0; mime[i]; i++)
{
res |= strstr(mime[i], "image/svg") == mime[i];
}
g_strfreev(mime);
if (res) break;
}
g_slist_free(ff);
return (res);
}
static int load_svg(char *file_name, ls_settings *settings)
{
GdkPixbuf *pbuf;
GError *err = NULL;
guchar *src;
unsigned char *dest, *dsta;
int i, j, w, h, bpp, cmask, skip, res = -1;
#if (GDK_PIXBUF_MAJOR == 2) && (GDK_PIXBUF_MINOR < 8)
/* 2.4 can constrain size only while preserving aspect ratio;
* 2.6 can constrain size fully, but not partially */
if (settings->req_w && settings->req_h)
pbuf = gdk_pixbuf_new_from_file_at_scale(file_name,
settings->req_w, settings->req_h, FALSE, &err);
else pbuf = gdk_pixbuf_new_from_file(file_name, &err);
#else
/* 2.8+ is full-featured */
pbuf = gdk_pixbuf_new_from_file_at_scale(file_name,
settings->req_w ? settings->req_w : -1,
settings->req_h ? settings->req_h : -1,
!(settings->req_w && settings->req_h), &err);
#endif
if (!pbuf)
{
if ((err->domain == GDK_PIXBUF_ERROR) &&
(err->code == GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY))
res = FILE_MEM_ERROR;
g_error_free(err);
return (res);
}
/* Prevent images loading wrong in case gdk-pixbuf ever starts using
* something other than 8-bit RGB/RGBA without me noticing - WJ */
if (gdk_pixbuf_get_bits_per_sample(pbuf) != 8) goto fail;
bpp = gdk_pixbuf_get_n_channels(pbuf);
if (bpp == 4) cmask = CMASK_RGBA;
else if (bpp == 3) cmask = CMASK_IMAGE;
else goto fail;
settings->width = w = gdk_pixbuf_get_width(pbuf);
settings->height = h = gdk_pixbuf_get_height(pbuf);
settings->bpp = 3;
if ((res = allocate_image(settings, cmask))) goto fail;
skip = gdk_pixbuf_get_rowstride(pbuf) - w * bpp;
src = gdk_pixbuf_get_pixels(pbuf);
dest = settings->img[CHN_IMAGE];
dsta = settings->img[CHN_ALPHA];
for (i = 0; i < h; i++ , src += skip)
for (j = 0; j < w; j++ , src += bpp , dest += 3)
{
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
if (dsta) *dsta++ = src[3];
}
res = 1;
fail: g_object_unref(pbuf);
return (res);
}
#endif
/* Handle textual palette file formats - GIMP's GPL and mtPaint's own TXT */
static void to_pal(png_color *c, int *rgb)
{
c->red = rgb[0] < 0 ? 0 : rgb[0] > 255 ? 255 : rgb[0];
c->green = rgb[1] < 0 ? 0 : rgb[1] > 255 ? 255 : rgb[1];
c->blue = rgb[2] < 0 ? 0 : rgb[2] > 255 ? 255 : rgb[2];
}
static int load_txtpal(char *file_name, ls_settings *settings)
{
char lbuf[4096];
FILE *fp;
png_color *c = settings->pal;
int i, rgb[3], n = 0, res = -1;
if (!(fp = fopen(file_name, "r"))) return (-1);
if (!fgets(lbuf, 4096, fp)) goto fail;
if (settings->ftype == FT_GPL)
{
if (strstr(lbuf, "GIMP Palette") != lbuf) goto fail;
while (fgets(lbuf, 4096, fp) && (n < 256))
{
/* Just ignore invalid/unknown lines */
if (sscanf(lbuf, "%d %d %d", rgb + 0, rgb + 1, rgb + 2) != 3)
continue;
to_pal(c++, rgb);
n++;
}
}
else
{
if (sscanf(lbuf, "%i", &n) != 1) goto fail;
/* No further validation of anything at all */
n = n < 2 ? 2 : n > 256 ? 256 : n;
for (i = 0; i < n; i++)
{
fscanf(fp, "%i,%i,%i\n", rgb + 0, rgb + 1, rgb + 2);
to_pal(c++, rgb);
}
}
settings->colors = n;
if (n > 0) res = 1;
fail: fclose(fp);
return (res);
}
static int save_txtpal(char *file_name, ls_settings *settings)
{
FILE *fp;
char *tpl;
png_color *cp;
int i, l, n = settings->colors;
if ((fp = fopen(file_name, "w")) == NULL) return (-1);
if (settings->ftype == FT_GPL) // .gpl file
{
tpl = extract_ident(file_name, &l);
if (!l) tpl = "mtPaint" , l = strlen("mtPaint");
fprintf(fp, "GIMP Palette\nName: %.*s\nColumns: 16\n#\n", l, tpl);
tpl = "%3i %3i %3i\tUntitled\n";
}
else // .txt file
{
fprintf(fp, "%i\n", n);
tpl = "%i,%i,%i\n";
}
cp = settings->pal;
for (i = 0; i < n; i++ , cp++)
fprintf(fp, tpl, cp->red, cp->green, cp->blue);
fclose(fp);
return (0);
}
static int save_image_x(char *file_name, ls_settings *settings, memFILE *mf)
{
ls_settings setw = *settings; // Make a copy to safely modify
png_color greypal[256];
int res;
/* Prepare to handle clipboard export */
if (setw.mode != FS_CLIPBOARD); // not export
else if (setw.ftype & FTM_EXTEND) setw.mode = FS_CLIP_FILE; // to mtPaint
else if (setw.img[CHN_SEL] && !setw.img[CHN_ALPHA])
{
/* Pass clipboard mask as alpha if there is no alpha already */
setw.img[CHN_ALPHA] = setw.img[CHN_SEL];
setw.img[CHN_SEL] = NULL;
}
setw.ftype &= FTM_FTYPE;
/* Provide a grayscale palette if needed */
if ((setw.bpp == 1) && !setw.pal)
mem_bw_pal(setw.pal = greypal, 0, 255);
/* Validate transparent color (for now, forbid out-of-palette RGB
* transparency altogether) */
if (setw.xpm_trans >= setw.colors)
setw.xpm_trans = setw.rgb_trans = -1;
switch (setw.ftype)
{
default:
case FT_PNG: res = save_png(file_name, &setw, mf); break;
#ifdef U_JPEG
case FT_JPEG: res = save_jpeg(file_name, &setw); break;
#endif
#ifdef HANDLE_JP2
case FT_JP2:
case FT_J2K: res = save_jpeg2000(file_name, &setw); break;
#endif
#ifdef U_TIFF
case FT_TIFF: res = save_tiff(file_name, &setw); break;
#endif
#ifdef U_GIF
case FT_GIF: res = save_gif(file_name, &setw); break;
#endif
case FT_BMP: res = save_bmp(file_name, &setw, mf); break;
case FT_XPM: res = save_xpm(file_name, &setw); break;
case FT_XBM: res = save_xbm(file_name, &setw); break;
case FT_LSS: res = save_lss(file_name, &setw); break;
case FT_TGA: res = save_tga(file_name, &setw); break;
case FT_PCX: res = save_pcx(file_name, &setw); break;
case FT_PBM: res = save_pbm(file_name, &setw); break;
case FT_PPM: res = save_ppm(file_name, &setw); break;
case FT_PAM: res = save_pam(file_name, &setw); break;
case FT_PIXMAP: res = save_pixmap(&setw, mf); break;
/* Palette files */
case FT_GPL:
case FT_TXT: res = save_txtpal(file_name, &setw); break;
/* !!! Not implemented yet */
// case FT_PAL:
}
return (res);
}
int save_image(char *file_name, ls_settings *settings)
{
return (save_image_x(file_name, settings, NULL));
}
int save_mem_image(unsigned char **buf, int *len, ls_settings *settings)
{
memFILE mf;
int res;
memset(&mf, 0, sizeof(mf));
if ((settings->ftype & FTM_FTYPE) == FT_PIXMAP)
{
/* !!! Evil hack: we abuse memFILE struct, storing pixmap XID
* in buffer pointer, and then copy it into passed-in buffer
* pointer - WJ */
res = save_image_x(NULL, settings, &mf);
if (!res) *buf = mf.buf , *len = mf.top;
return (res);
}
if (!(file_formats[settings->ftype & FTM_FTYPE].flags & FF_WMEM))
return (-1);
mf.buf = malloc(mf.size = 0x4000 - 64);
/* Be silent when saving to memory */
settings->silent = TRUE;
res = save_image_x(NULL, settings, &mf);
if (res) free(mf.buf);
else *buf = mf.buf , *len = mf.top;
return (res);
}
static void store_image_extras(image_info *image, image_state *state,
ls_settings *settings)
{
#if U_LCMS
/* Apply ICC profile */
while ((settings->icc_size > 0) && (settings->bpp == 3))
{
cmsHPROFILE from, to;
cmsHTRANSFORM how = NULL;
int l = settings->icc_size - sizeof(icHeader);
unsigned char *iccdata = settings->icc + sizeof(icHeader);
/* Do nothing if the profile seems to be the default sRGB one */
if ((l == 3016) && (hashf(HASHSEED, iccdata, l) == 0xBA0A8E52UL) &&
(hashf(HASH_RND(HASHSEED), iccdata, l) == 0x94C42C77UL)) break;
from = cmsOpenProfileFromMem((void *)settings->icc,
settings->icc_size);
to = cmsCreate_sRGBProfile();
if (from && (cmsGetColorSpace(from) == icSigRgbData))
how = cmsCreateTransform(from, TYPE_RGB_8,
to, TYPE_RGB_8, INTENT_PERCEPTUAL, 0);
if (how)
{
unsigned char *img = settings->img[CHN_IMAGE];
size_t l = settings->width, sz = l * settings->height;
int i, j;
if (!settings->silent)
progress_init(_("Applying colour profile"), 1);
else if (sz < UINT_MAX) l = sz;
j = sz / l;
for (i = 0; i < j; i++ , img += l * 3)
{
if (!settings->silent && ((i * 20) % j >= j - 20))
if (progress_update((float)i / j)) break;
cmsDoTransform(how, img, img, l);
}
progress_end();
cmsDeleteTransform(how);
}
if (from) cmsCloseProfile(from);
cmsCloseProfile(to);
break;
}
#endif
// !!! Changing any values is frequently harmful in this mode, so don't do it
if (settings->mode == FS_CHANNEL_LOAD) return;
/* Stuff RGB transparency into color 255 */
if ((settings->rgb_trans >= 0) && (settings->bpp == 3))
{
int i;
// Look for transparent colour in palette
for (i = 0; i < settings->colors; i++)
{
if (PNG_2_INT(settings->pal[i]) == settings->rgb_trans)
break;
}
if (i < settings->colors) settings->xpm_trans = i;
else
{ // Colour not in palette so force it into last entry
settings->pal[255].red = INT_2_R(settings->rgb_trans);
settings->pal[255].green = INT_2_G(settings->rgb_trans);
settings->pal[255].blue = INT_2_B(settings->rgb_trans);
settings->xpm_trans = 255;
settings->colors = 256;
}
}
/* Accept vars which make sense */
state->xbm_hot_x = settings->hot_x;
state->xbm_hot_y = settings->hot_y;
preserved_gif_delay = settings->gif_delay;
/* Accept palette */
image->trans = settings->xpm_trans;
mem_pal_copy(image->pal, settings->pal);
image->cols = settings->colors;
}
static int load_image_x(char *file_name, memFILE *mf, int mode, int ftype)
{
layer_image *lim = NULL;
png_color pal[256];
ls_settings settings;
int i, tr, res, res0, undo = ftype & FTM_UNDO;
/* Clipboard import - from mtPaint, or from something other? */
if ((mode == FS_CLIPBOARD) && (ftype & FTM_EXTEND)) mode = FS_CLIP_FILE;
ftype &= FTM_FTYPE;
/* Prepare layer slot */
if (mode == FS_LAYER_LOAD)
{
lim = layer_table[layers_total].image;
if (!lim) lim = layer_table[layers_total].image =
alloc_layer(0, 0, 1, 0, NULL);
else if (layers_total) mem_free_image(&lim->image_, FREE_IMAGE);
if (!lim) return (FILE_MEM_ERROR);
}
init_ls_settings(&settings, NULL);
#ifdef U_LCMS
/* Set size to -1 when we don't want color profile */
if (!apply_icc || ((mode == FS_CHANNEL_LOAD) ? (MEM_BPP != 3) :
(mode != FS_PNG_LOAD) && (mode != FS_LAYER_LOAD)))
settings.icc_size = -1;
#endif
/* 0th layer load is just an image load */
if ((mode == FS_LAYER_LOAD) && !layers_total) mode = FS_PNG_LOAD;
settings.mode = mode;
settings.ftype = ftype;
settings.pal = pal;
/* Clear hotspot & transparency */
settings.hot_x = settings.hot_y = -1;
settings.xpm_trans = settings.rgb_trans = -1;
/* Be silent if working from memory */
if (mf) settings.silent = TRUE;
/* !!! Use default palette - for now */
mem_pal_copy(pal, mem_pal_def);
settings.colors = mem_pal_def_i;
switch (ftype)
{
default:
case FT_PNG: res0 = load_png(file_name, &settings, mf); break;
#ifdef U_GIF
case FT_GIF: res0 = load_gif(file_name, &settings); break;
#endif
#ifdef U_JPEG
case FT_JPEG: res0 = load_jpeg(file_name, &settings); break;
#endif
#ifdef HANDLE_JP2
case FT_JP2:
case FT_J2K: res0 = load_jpeg2000(file_name, &settings); break;
#endif
#ifdef U_TIFF
case FT_TIFF: res0 = load_tiff(file_name, &settings); break;
#endif
case FT_BMP: res0 = load_bmp(file_name, &settings, mf); break;
case FT_XPM: res0 = load_xpm(file_name, &settings); break;
case FT_XBM: res0 = load_xbm(file_name, &settings); break;
case FT_LSS: res0 = load_lss(file_name, &settings); break;
case FT_TGA: res0 = load_tga(file_name, &settings); break;
case FT_PCX: res0 = load_pcx(file_name, &settings); break;
case FT_PBM:
case FT_PGM:
case FT_PPM:
case FT_PAM: res0 = load_pnm(file_name, &settings); break;
case FT_PIXMAP: res0 = load_pixmap(file_name, &settings); break;
#ifdef MAY_HANDLE_SVG
case FT_SVG: res0 = load_svg(file_name, &settings); break;
#endif
/* Palette files */
case FT_GPL:
case FT_TXT: res0 = load_txtpal(file_name, &settings); break;
/* !!! Not implemented yet */
// case FT_PAL:
}
/* Consider animated GIF a success */
res = res0 == FILE_HAS_FRAMES ? 1 : res0;
switch (mode)
{
case FS_PNG_LOAD: /* Image */
/* Success, or lib failure with single image - commit load */
if ((res == 1) || (!lim && (res == FILE_LIB_ERROR)))
{
if (!mem_img[CHN_IMAGE] || !undo)
mem_new(settings.width, settings.height,
settings.bpp, 0);
else undo_next_core(UC_DELETE, settings.width,
settings.height, settings.bpp, CMASK_ALL);
memcpy(mem_img, settings.img, sizeof(chanlist));
store_image_extras(&mem_image, &mem_state, &settings);
update_undo(&mem_image);
mem_undo_prepare();
if (lim) layer_copy_from_main(0);
/* Report whether the file is animated */
res = res0;
}
/* Failure */
else
{
mem_free_chanlist(settings.img);
/* If loader managed to delete image before failing */
if (!mem_img[CHN_IMAGE]) create_default_image();
}
break;
case FS_CLIPBOARD: /* Imported clipboard */
if ((res == 1) && mem_clip_alpha && !mem_clip_mask)
{
/* "Alpha" likely means clipboard mask here */
mem_clip_mask = mem_clip_alpha;
mem_clip_alpha = NULL;
memcpy(settings.img, mem_clip.img, sizeof(chanlist));
}
/* Fallthrough */
case FS_CLIP_FILE: /* Clipboard */
/* Convert color transparency to alpha */
tr = settings.bpp == 3 ? settings.rgb_trans : settings.xpm_trans;
if ((res == 1) && (tr >= 0))
{
/* Add alpha channel if no alpha yet */
if (!settings.img[CHN_ALPHA])
{
i = settings.width * settings.height;
/* !!! Create committed */
mem_clip_alpha = malloc(i);
if (mem_clip_alpha)
{
settings.img[CHN_ALPHA] = mem_clip_alpha;
memset(mem_clip_alpha, 255, i);
}
}
if (!settings.img[CHN_ALPHA]) res = FILE_MEM_ERROR;
else mem_mask_colors(settings.img[CHN_ALPHA],
settings.img[CHN_IMAGE], 0, settings.width,
settings.height, settings.bpp, tr, tr);
}
/* Success - accept data */
if (res == 1); /* !!! Clipboard data committed already */
/* Failure needing rollback */
else if (settings.img[CHN_IMAGE])
{
/* !!! Too late to restore previous clipboard */
mem_free_image(&mem_clip, FREE_ALL);
}
break;
case FS_CHANNEL_LOAD:
/* Success - commit load */
if (res == 1)
{
/* Add frame & stuff data into it */
undo_next_core(UC_DELETE, mem_width, mem_height, mem_img_bpp,
CMASK_CURR);
mem_img[mem_channel] = settings.img[CHN_IMAGE];
update_undo(&mem_image);
if (mem_channel == CHN_IMAGE)
store_image_extras(&mem_image, &mem_state, &settings);
mem_undo_prepare();
}
/* Failure */
else free(settings.img[CHN_IMAGE]);
break;
case FS_LAYER_LOAD: /* Layer */
/* Success - commit load */
if (res == 1)
{
mem_alloc_image(0, &lim->image_, settings.width,
settings.height, settings.bpp, 0, NULL);
memcpy(lim->image_.img, settings.img, sizeof(chanlist));
store_image_extras(&lim->image_, &lim->state_, &settings);
update_undo(&lim->image_);
}
/* Failure */
else mem_free_chanlist(settings.img);
break;
case FS_PATTERN_LOAD:
/* Success - rebuild patterns */
if ((res == 1) && (settings.colors == 2))
set_patterns(settings.img[CHN_IMAGE]);
free(settings.img[CHN_IMAGE]);
break;
case FS_PALETTE_LOAD:
case FS_PALETTE_DEF:
/* Drop image channels if any */
mem_free_chanlist(settings.img);
/* This "failure" in this context serves as shortcut */
if (res == EXPLODE_FAILED) res = 1;
/* Failure - do nothing */
// !!! In case of _image_ format here, re-recognize as palette and retry
if ((res != 1) || (settings.colors <= 0));
/* Replace default palette */
else if (mode == FS_PALETTE_DEF)
{
mem_pal_copy(mem_pal_def, pal);
mem_pal_def_i = settings.colors;
}
/* Change current palette */
else
{
mem_undo_next(UNDO_PAL);
mem_pal_copy(mem_pal, pal);
mem_cols = settings.colors;
}
break;
}
free(settings.icc);
return (res);
}
int load_image(char *file_name, int mode, int ftype)
{
return (load_image_x(file_name, NULL, mode, ftype));
}
int load_mem_image(unsigned char *buf, int len, int mode, int ftype)
{
memFILE mf;
if ((ftype & FTM_FTYPE) == FT_PIXMAP)
/* Special case: buf points to a pixmap ID */
return (load_image_x(buf, NULL, mode, ftype));
if (!(file_formats[ftype & FTM_FTYPE].flags & FF_RMEM)) return (-1);
memset(&mf, 0, sizeof(mf));
mf.buf = buf; mf.top = mf.size = len;
return (load_image_x(NULL, &mf, mode, ftype));
}
// !!! The only allowed modes for now are FS_LAYER_LOAD and FS_EXPLODE_FRAMES
static int load_frames_x(ani_settings *ani, int ani_mode, char *file_name,
int mode, int ftype)
{
png_color pal[256];
ftype &= FTM_FTYPE;
ani->mode = ani_mode;
init_ls_settings(&ani->settings, NULL);
ani->settings.mode = mode;
ani->settings.ftype = ftype;
ani->settings.pal = pal;
/* Clear hotspot & transparency */
ani->settings.hot_x = ani->settings.hot_y = -1;
ani->settings.xpm_trans = ani->settings.rgb_trans = -1;
/* No load progressbar when exploding frames */
if (ani_mode == FS_EXPLODE_FRAMES) ani->settings.silent = TRUE;
/* !!! Use default palette - for now */
mem_pal_copy(pal, mem_pal_def);
ani->settings.colors = mem_pal_def_i;
switch (ftype)
{
// case FT_PNG: return (load_apng_frames(file_name, ani));
#ifdef U_GIF
case FT_GIF: return (load_gif_frames(file_name, ani));
#endif
#ifdef U_TIFF
case FT_TIFF: return (load_tiff_frames(file_name, ani));
#endif
case FT_PBM:
case FT_PGM:
case FT_PPM:
case FT_PAM: return (load_pnm_frames(file_name, ani));
}
return (-1);
}
int load_frameset(frameset *frames, int ani_mode, char *file_name, int mode,
int ftype)
{
ani_settings ani;
int res;
memset(&ani, 0, sizeof(ani_settings));
res = load_frames_x(&ani, ani_mode, file_name, mode, ftype);
/* Treat out-of-memory error as fatal, to avoid worse things later */
if ((res == FILE_MEM_ERROR) || !ani.fset.cnt)
mem_free_frames(&ani.fset);
/* Pass too-many-frames error along */
else if (res == FILE_TOO_LONG);
/* Consider all other errors partial failures */
else if (res != 1) res = FILE_LIB_ERROR;
/* Just pass the frameset to the outside, for now */
*frames = ani.fset;
return (res);
}
/* Write out the last frame to indexed sequence, and delete it */
static int write_out_frame(char *file_name, ani_settings *ani, ls_settings *f_set)
{
ls_settings w_set;
image_frame *frame = ani->fset.frames + ani->fset.cnt - 1;
char new_name[PATHBUF + 32], *tmp;
int n, deftype = ani->desttype, res;
/* Show progress, for unknown final count */
n = nextpow2(ani->cnt);
if (n < 16) n = 16;
progress_update((float)ani->cnt / n);
tmp = strrchr(file_name, DIR_SEP);
if (!tmp) tmp = file_name;
else tmp++;
file_in_dir(new_name, ani->destdir, tmp, PATHBUF);
tmp = new_name + strlen(new_name);
sprintf(tmp, ".%03d", ani->cnt);
if (f_set) w_set = *f_set;
else
{
init_ls_settings(&w_set, NULL);
memcpy(w_set.img, frame->img, sizeof(chanlist));
w_set.width = frame->width;
w_set.height = frame->height;
w_set.pal = frame->pal ? frame->pal : ani->fset.pal;
w_set.bpp = frame->bpp;
w_set.colors = frame->cols;
w_set.xpm_trans = frame->trans;
}
w_set.ftype = deftype;
w_set.silent = TRUE;
if (!(file_formats[deftype].flags & FF_SAVE_MASK_FOR(w_set)))
{
w_set.ftype = FT_PNG;
ani->miss++;
}
w_set.mode = ani->mode; // Only FS_EXPLODE_FRAMES for now
res = ani->error = save_image(new_name, &w_set);
if (!res) ani->cnt++;
if (f_set) // Delete
{
mem_free_chanlist(f_set->img);
memset(f_set->img, 0, sizeof(chanlist));
}
// Set for deletion
else frame->flags |= FM_NUKE;
return (res);
}
static void warn_miss(int miss, int total, int ftype)
{
char *txt = g_strdup_printf(_("%d out of %d frames could not be saved as %s - saved as PNG instead"),
miss, total, file_formats[ftype].name);
alert_box(_("Warning"), txt, NULL);
g_free(txt);
}
int explode_frames(char *dest_path, int ani_mode, char *file_name, int ftype,
int desttype)
{
ani_settings ani;
int res;
memset(&ani, 0, sizeof(ani_settings));
ani.desttype = desttype;
ani.destdir = dest_path;
progress_init(_("Explode frames"), 0);
progress_update(0.0);
res = load_frames_x(&ani, ani_mode, file_name, FS_EXPLODE_FRAMES, ftype);
progress_update(1.0);
if (res == 1); // Everything went OK
else if (res == FILE_MEM_ERROR); // Report memory problem
else if (ani.error) // Sequence write failure - soft or hard?
res = ani.cnt ? FILE_EXP_BREAK : EXPLODE_FAILED;
else if (ani.cnt) // Failed to read some middle frame
res = FILE_LIB_ERROR;
mem_free_frames(&ani.fset);
progress_end();
if (ani.miss && (res == 1))
warn_miss(ani.miss, ani.cnt, ftype & FTM_FTYPE);
return (res);
}
int export_undo(char *file_name, ls_settings *settings)
{
char new_name[PATHBUF + 32];
int start = mem_undo_done, res = 0, lenny, i, j;
int deftype = settings->ftype, miss = 0;
strncpy(new_name, file_name, PATHBUF);
lenny = strlen( file_name );
ls_init("UNDO", 1);
settings->silent = TRUE;
for (j = 0; j < 2; j++)
{
for (i = 1; i <= start + 1; i++)
{
if (!res && (!j ^ (settings->mode == FS_EXPORT_UNDO)))
{
progress_update((float)i / (start + 1));
settings->ftype = deftype;
if (!(file_formats[deftype].flags & FF_SAVE_MASK))
{
settings->ftype = FT_PNG;
miss++;
}
sprintf(new_name + lenny, "%03i.%s", i,
file_formats[settings->ftype].ext);
memcpy(settings->img, mem_img, sizeof(chanlist));
settings->pal = mem_pal;
settings->width = mem_width;
settings->height = mem_height;
settings->bpp = mem_img_bpp;
settings->colors = mem_cols;
res = save_image(new_name, settings);
}
if (!j) /* Goto first image */
{
if (mem_undo_done > 0) mem_undo_backward();
}
else if (mem_undo_done < start) mem_undo_forward();
}
}
progress_end();
if (miss && !res) warn_miss(miss, mem_undo_done, deftype);
return (res);
}
int export_ascii ( char *file_name )
{
char ch[16] = " .,:;+=itIYVXRBM";
int i, j;
unsigned char pix;
FILE *fp;
if ((fp = fopen(file_name, "w")) == NULL) return -1;
for ( j=0; j<mem_height; j++ )
{
for ( i=0; i<mem_width; i++ )
{
pix = mem_img[CHN_IMAGE][ i + mem_width*j ];
fprintf(fp, "%c", ch[pix % 16]);
}
fprintf(fp, "\n");
}
fclose(fp);
return 0;
}
static int do_detect_format(char *name, FILE *fp)
{
unsigned char buf[66], *stop;
int i;
i = fread(buf, 1, 64, fp);
buf[64] = '\0';
/* Check all unambiguous signatures */
if (!memcmp(buf, "\x89PNG", 4)) return (FT_PNG);
if (!memcmp(buf, "\xFF\xD8", 2))
#ifdef U_JPEG
return (FT_JPEG);
#else
return (FT_NONE);
#endif
if (!memcmp(buf, "\0\0\0\x0C\x6A\x50\x20\x20\x0D\x0A\x87\x0A", 12))
#ifdef HANDLE_JP2
return (FT_JP2);
#else
return (FT_NONE);
#endif
if (!memcmp(buf, "\xFF\x4F", 2))
#ifdef HANDLE_JP2
return (FT_J2K);
#else
return (FT_NONE);
#endif
if (!memcmp(buf, "II", 2) || !memcmp(buf, "MM", 2))
#ifdef U_TIFF
return (FT_TIFF);
#else
return (FT_NONE);
#endif
if (!memcmp(buf, "GIF8", 4))
#ifdef U_GIF
return (FT_GIF);
#else
return (FT_NONE);
#endif
if (!memcmp(buf, "BM", 2)) return (FT_BMP);
if (!memcmp(buf, "\x3D\xF3\x13\x14", 4)) return (FT_LSS);
if (!memcmp(buf, "P7", 2)) return (FT_PAM);
if ((buf[0] == 'P') && (buf[1] >= '1') && (buf[1] <= '6'))
{
static const unsigned char pnms[3] = { FT_PBM, FT_PGM, FT_PPM };
return (pnms[(buf[1] - '1') % 3]);
}
if (!memcmp(buf, "GIMP Palette", strlen("GIMP Palette"))) return (FT_GPL);
/* Check layers signature and version */
if (!memcmp(buf, LAYERS_HEADER, strlen(LAYERS_HEADER)))
{
stop = strchr(buf, '\n');
if (!stop || (stop - buf > 32)) return (FT_NONE);
i = atoi(++stop);
if (i == 1) return (FT_LAYERS1);
/* !!! Not implemented yet */
// if (i == 2) return (FT_LAYERS2);
return (FT_NONE);
}
/* Assume generic XML is SVG */
i = 0; sscanf(buf, " <?xml %n", &i);
if (!i) sscanf(buf, " <svg%n", &i);
#ifdef MAY_HANDLE_SVG
if (i)
{ /* SVG support need be checked at runtime */
if (svg_ftype < 0) svg_ftype = svg_supported() ? FT_SVG : FT_NONE;
return (svg_ftype);
}
#else
if (i) return (FT_NONE);
#endif
/* Discern PCX from TGA */
while (buf[0] == 10)
{
if (buf[1] > 5) break;
if (buf[1] > 1) return (FT_PCX);
if (buf[2] != 1) break;
/* Ambiguity - look at name as a last resort
* Bias to PCX - TGAs usually have 0th byte = 0 */
stop = strrchr(name, '.');
if (!stop) return (FT_PCX);
if (!strcasecmp(stop + 1, "tga")) break;
return (FT_PCX);
}
/* Check if this is TGA */
if ((buf[1] < 2) && (buf[2] < 12) && ((1 << buf[2]) & 0x0E0F))
return (FT_TGA);
/* Simple check for "txt" palette format */
if ((sscanf(buf, "%i", &i) == 1) && (i > 0) && (i <= 256)) return (FT_TXT);
/* Simple check for XPM */
stop = strstr(buf, "XPM");
if (stop)
{
i = stop - buf;
stop = strchr(buf, '\n');
if (!stop || (stop - buf > i)) return (FT_XPM);
}
/* Check possibility of XBM by absence of control chars */
for (i = 0; buf[i] && (buf[i] != '\n'); i++)
{
if (ISCNTRL(buf[i])) return (FT_NONE);
}
return (FT_XBM);
}
int detect_file_format(char *name, int need_palette)
{
FILE *fp;
int i, f;
if (!(fp = fopen(name, "rb"))) return (-1);
i = do_detect_format(name, fp);
f = file_formats[i].flags;
if (need_palette)
{
#if 0
/* Check the raw "pal" format */
if (!(f & (FF_16 | FF_256 | FF_PALETTE)))
{
int l;
fseek(fp, 0, SEEK_END);
l = ftell(fp);
i = l && (l <= 768) && !(l % 3) ? FT_PAL : FT_NONE;
}
#else
if (!(f & (FF_16 | FF_256 | FF_PALETTE))) i = FT_NONE;
#endif
}
else if (!(f & (FF_IMAGE | FF_LAYER))) i = FT_NONE;
fclose(fp);
return (i);
}
int valid_file( char *filename ) // Can this file be opened for reading?
{
FILE *fp;
fp = fopen(filename, "r");
if (!fp) return (errno == ENOENT ? -1 : 1);
else
{
fclose(fp);
return 0;
}
}
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