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/*
* Copyright (C) Andrew Apted <ajapted@users.sourceforge.net> 2002
* Slash'EM Development Team 2003
* NetHack may be freely redistributed. See license for details.
*/
/*
* Convert the given input tile files into the PNG file for use by
* various windowing ports.
*
* Based on win/X11/tile2x11.c
*
* TODO HERE:
* + Would be nice if it didn't use so much memory...
*/
#include "hack.h"
#include "tile.h"
/* N.H uses compress/uncompress, conflicting with ZLIB headers */
#undef compress
#undef uncompress
/* certain N.H #defines conflict with the SDL header files */
#undef red
#undef green
#undef blue
#include <png.h>
#include <zlib.h>
#include <assert.h>
/* [AJA] Use this value instead of MAX_GLYPH, as MAX_GLYPH is much
* greater than what we need (mainly due to the swallows), and
* for the 48x64 tileset it would need to allocate almost 200 MB
* of memory !
*/
#define MAX_TILE_NUM 2048
#define OUTNAME "gltiles.png" /* Default output file name */
int ntiles = 0;
int max_rows = -1;
int saved_tile_x = -1;
int saved_tile_y = -1;
unsigned char *tile_bytes_rgba = NULL;
unsigned char *tile_bytes_i = NULL;
png_colorp tile_palette = NULL;
int tile_palette_n = 0;
int has_trans = 0;
int num_across = TILES_PER_ROW;
pixel trans_p = DEFAULT_BACKGROUND;
/* -------------------------------------------------------------------- */
void save_png(const char *filename, int width, int height)
{
/* [AJA] all the volatiles here may seem strange. They are needed
* because the ANSI C standard (which GCC adheres to) says
* that when setjmp/longjmp is being used, only volatile local
* variables are guaranteed to keep their state if longjmp()
* gets called.
*/
FILE * volatile fp = NULL;
png_bytep * volatile row_pointers = NULL;
/* we take the address of these two, so we shouldn't need the
* volatile. (GCC complains about discarding qualifiers if the
* volatile is there).
*/
png_structp /* volatile */ png_ptr = NULL;
png_infop /* volatile */ info_ptr = NULL;
int row;
/* open the file */
fp = fopen(filename, "wb");
if (fp == NULL)
{
fprintf(stderr, "tile2png: Can't open output file: %s\n", filename);
goto failed;
}
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
NULL, NULL, NULL);
if (png_ptr == NULL)
{
fprintf(stderr, "tile2png: PNG error (out of memory ?)\n");
goto failed;
}
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL)
{
fprintf(stderr, "tile2png: PNG error (out of memory ?)\n");
goto failed;
}
/* set error handling since we are using the setjmp/longjmp method
* (this is the normal method of doing things with libpng).
*/
if (setjmp(png_jmpbuf(png_ptr)))
{
fprintf(stderr, "tile2png: Unknown problem while writing PNG.\n");
goto failed;
}
png_init_io(png_ptr, fp);
png_set_compression_level(png_ptr, Z_BEST_COMPRESSION);
png_set_IHDR(png_ptr, info_ptr, width, height, 8,
tile_palette ? PNG_COLOR_TYPE_PALETTE :
has_trans ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
if (tile_palette)
{
png_set_PLTE(png_ptr, info_ptr, tile_palette, tile_palette_n);
if (has_trans)
{
png_byte trans = (png_byte)0; /* Colour zero is transparent */
png_set_tRNS(png_ptr, info_ptr, &trans, 1, NULL);
}
}
png_write_info(png_ptr, info_ptr);
row_pointers = (png_bytep *) malloc(height * sizeof(png_bytep));
if (!row_pointers)
{
fprintf(stderr, "tile2png: Out of memory.\n");
goto failed;
}
if (tile_palette)
for (row = 0; row < height; row++)
row_pointers[row] = tile_bytes_i + row * width;
else
for (row = 0; row < height; row++)
row_pointers[row] = tile_bytes_rgba + row * width * (has_trans ? 4 : 3);
png_write_image(png_ptr, row_pointers);
png_write_end(png_ptr, info_ptr);
free(row_pointers);
/* clean up after the write, and free any memory allocated */
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(fp);
return;
/* [AJA] Normally I don't like gotos. In this situation where there
* are lots of points of possible failure and a growing set of
* things to be undone, it makes for nicer code.
*/
failed:
if (png_ptr)
{
/* assume NULLs not allowed (png docs don't say) */
if (info_ptr)
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
else
png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
}
if (row_pointers)
free(row_pointers);
if (fp)
fclose(fp);
}
/* -------------------------------------------------------------------- */
/* Convert the tiles in the file to our RGBA format.
*/
static int convert_tiles(void)
{
unsigned char *tb;
pixel tile[MAX_TILE_Y][MAX_TILE_X];
int x, y, i;
int bx, by;
int count = 0;
int pix_w = (has_trans ? 4 : 3);
int stride = tile_x * num_across * pix_w;
while (read_text_tile(tile))
{
count++;
bx = ntiles % num_across;
by = ntiles / num_across;
tb = tile_bytes_rgba + (by * tile_y * stride + bx * tile_x * pix_w);
for (y = 0; y < tile_y; y++, tb += stride)
for (x = 0; x < tile_x; x++)
{
tb[x*pix_w + 0] = tile[y][x].r;
tb[x*pix_w + 1] = tile[y][x].g;
tb[x*pix_w + 2] = tile[y][x].b;
if (has_trans)
tb[x*pix_w + 3] = pixel_equal(tile[y][x], trans_p) ? 0 : 255;
if (tile_palette)
{
for (i = tile_palette_n - 1; i >= 0; i--)
{
if (tile_palette[i].red == tile[y][x].r &&
tile_palette[i].green == tile[y][x].g &&
tile_palette[i].blue == tile[y][x].b)
break;
}
if (i < 0)
{
if (tile_palette_n < 256)
{
i = tile_palette_n++;
tile_palette[i].red = tile[y][x].r;
tile_palette[i].green = tile[y][x].g;
tile_palette[i].blue = tile[y][x].b;
}
else
{
free(tile_palette);
tile_palette = NULL;
free(tile_bytes_i);
tile_bytes_i = NULL;
}
}
}
if (tile_bytes_i)
tile_bytes_i[((by * tile_y + y) * num_across + bx) * tile_x + x] = i;
}
ntiles++;
if (ntiles >= MAX_TILE_NUM)
{
fprintf(stderr, "tile2png: Too many tiles !!\n");
exit(1);
}
}
return count;
}
/* Open the given file, read & merge the colormap, convert the tiles.
*/
static void process_file(const char *fname)
{
int count;
if (!fopen_text_file(fname, RDTMODE))
{
Fprintf(stderr, "tile2png: Can't open file \"%s\"\n", fname);
exit(1);
}
if (!tile_bytes_rgba)
{
int size;
/*
* Delayed until we open the first input file so that
* we know the size of the tiles we are processing.
*/
max_rows = (MAX_TILE_NUM + num_across - 1) / num_across;
size = max_rows * num_across * tile_x * tile_y * (has_trans ? 4 : 3);
tile_bytes_rgba = calloc(size, 1);
if (!tile_bytes_rgba)
{
Fprintf(stderr, "tile2png: Not enough memory (%d KB).\n", size/1024);
exit(1);
}
saved_tile_x = tile_x;
saved_tile_y = tile_y;
}
if (!tile_bytes_i)
{
int size;
max_rows = (MAX_TILE_NUM + num_across - 1) / num_across;
size = max_rows * num_across * tile_x * tile_y;
tile_bytes_i = calloc(size, 1);
if (!tile_bytes_i)
{
Fprintf(stderr, "tile2png: Not enough memory (%d KB).\n", size/1024);
exit(1);
}
saved_tile_x = tile_x;
saved_tile_y = tile_y;
}
if (!tile_palette)
{
tile_palette = malloc(256 * sizeof(*tile_palette));
if (!tile_palette)
{
Fprintf(stderr, "tile2png: Not enough memory (%d bytes).\n",
sizeof(*tile_palette));
exit(1);
}
/* [ALI} PNG encoding is more efficient if the transparent
* colour is first in the palette, so add it here. This will
* cause a slight inefficiency if the image data proves not
* to contain any transparent pixels, but still seems the
* best option.
*/
if (has_trans)
{
tile_palette_n = 1;
tile_palette[0].red = trans_p.r;
tile_palette[0].green = trans_p.g;
tile_palette[0].blue = trans_p.b;
}
}
count = convert_tiles();
Fprintf(stderr, "%s: %d tiles (%dx%d)\n", fname, count, tile_x, tile_y);
fclose_text_file();
}
static void usage(void)
{
Fprintf(stderr, "Usage: tile2png [-o out_file] [-t] [-f] [-a##] [-b######] "
"txt_file1 [txt_file2 ...]\n");
fprintf(stderr, "Where: -t enables transparency\n");
fprintf(stderr, " -f is used for fonts\n");
fprintf(stderr, " -a gives the number of tiles across\n");
fprintf(stderr, " -b gives the background (transparent) color\n");
}
int main(int argc, const char **argv)
{
int i, argn = 1;
int num_down;
const char *outname = OUTNAME;
while (argn < argc)
{
if ((argv[argn][0] == '-' && argv[argn][1] == 'h') ||
(argv[argn][0] == '-' && argv[argn][1] == '-' &&
argv[argn][2] == 'h'))
{
usage();
exit(1);
}
if (argv[argn][0] == '-' && argv[argn][1] == 'o')
{
if (argv[argn][2])
outname = argv[argn] + 2;
else if (argn + 1 < argc)
outname = argv[++argn];
else
{
Fprintf(stderr, "tile2png: -o option needs an argument\n");
exit(EXIT_FAILURE);
}
argn++;
continue;
}
if (argv[argn][0] == '-' && argv[argn][1] == 'a')
{
if (argv[argn][2])
num_across = atoi(argv[argn] + 2);
else if (argn + 1 < argc)
num_across = atoi(argv[++argn]);
else
{
Fprintf(stderr, "tile2png: -a option needs an argument\n");
exit(EXIT_FAILURE);
}
if (num_across < 1)
{
Fprintf(stderr, "tile2png: bad value for -a option\n");
exit(EXIT_FAILURE);
}
argn++;
continue;
}
if (argv[argn][0] == '-' && argv[argn][1] == 't')
{
has_trans = 1;
argn++;
continue;
}
if (argv[argn][0] == '-' && argv[argn][1] == 'f')
{
has_trans = 1;
trans_p.r = trans_p.g = trans_p.b = 0;
num_across = 16;
argn++;
continue;
}
if (argv[argn][0] == '-' && argv[argn][1] == 'b')
{
const char *val;
int r, g, b;
if (argv[argn][2])
val = argv[argn] + 2;
else if (argn + 1 < argc)
val = argv[++argn];
else
{
Fprintf(stderr, "tile2png: -b option needs an argument\n");
exit(EXIT_FAILURE);
}
if (sscanf(val, "%02X%02X%02X", &r, &g, &b) != 3)
{
Fprintf(stderr, "tile2png: Background not understood: %s\n", val);
exit(EXIT_FAILURE);
}
trans_p.r = (unsigned char) r;
trans_p.g = (unsigned char) g;
trans_p.b = (unsigned char) b;
argn++;
continue;
}
break;
}
if (argn == argc)
{
usage();
exit(1);
}
for (i = argn; i < argc; i++)
{
process_file(argv[i]);
}
Fprintf(stderr, "Total tiles: %d\n", ntiles);
num_down = (ntiles + num_across - 1) / num_across;
save_png(outname, num_across * saved_tile_x, num_down * saved_tile_y);
if (tile_bytes_rgba)
{
free(tile_bytes_rgba);
tile_bytes_rgba = NULL;
}
if (tile_bytes_i)
{
free(tile_bytes_i);
tile_bytes_i = NULL;
}
if (tile_palette)
{
free(tile_palette);
tile_palette = NULL;
}
return 0;
}
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