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#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <tiffio.h>
#include "loader.h"
#ifdef USE_X11
# include "viewer.h"
#endif
struct tiff_state {
TIFF* tif;
char emsg[1024];
uint32 width,height;
uint16 config,nsamples;
uint32* row;
uint16 resunit;
float xres,yres;
};
static void*
tiff_init(FILE *fp, char *filename, struct ida_image_info *i)
{
struct tiff_state *h;
fclose(fp);
h = malloc(sizeof(*h));
memset(h,0,sizeof(*h));
h->tif = TIFFOpen(filename,"r");
if (NULL == h->tif)
goto oops;
TIFFGetField(h->tif, TIFFTAG_IMAGEWIDTH, &h->width);
TIFFGetField(h->tif, TIFFTAG_IMAGELENGTH, &h->height);
TIFFGetField(h->tif, TIFFTAG_PLANARCONFIG, &h->config);
TIFFGetField(h->tif, TIFFTAG_SAMPLESPERPIXEL, &h->nsamples);
h->row = malloc(TIFFScanlineSize(h->tif));
if (debug)
fprintf(stderr,"tiff: %ldx%ld, planar=%d, nsamples=%d, scanline=%ld\n",
h->width,h->height,h->config,h->nsamples,
TIFFScanlineSize(h->tif));
i->width = h->width;
i->height = h->height;
if (TIFFGetField(h->tif, TIFFTAG_RESOLUTIONUNIT, &h->resunit) &&
TIFFGetField(h->tif, TIFFTAG_XRESOLUTION, &h->xres) &&
TIFFGetField(h->tif, TIFFTAG_YRESOLUTION, &h->yres)) {
switch (h->resunit) {
case RESUNIT_NONE:
break;
case RESUNIT_INCH:
i->dpi = h->xres;
break;
case RESUNIT_CENTIMETER:
i->dpi = res_cm_to_inch(h->xres);
break;
}
}
return h;
oops:
if (h->tif)
TIFFClose(h->tif);
free(h);
return NULL;
}
static void
tiff_read(unsigned char *dst, int line, void *data)
{
struct tiff_state *h = data;
int s;
if (h->config == PLANARCONFIG_CONTIG) {
TIFFReadScanline(h->tif, h->row, line, 0);
} else if (h->config == PLANARCONFIG_SEPARATE) {
for (s = 0; s < h->nsamples; s++)
TIFFReadScanline(h->tif, h->row, line, s);
}
switch (h->nsamples) {
case 1:
/* gray */
load_gray(dst,(unsigned char*)(h->row),h->width);
break;
case 3:
/* rgb */
memcpy(dst,h->row,3*h->width);
break;
case 4:
/* rgb+alpha */
load_rgba(dst,(unsigned char*)(h->row),h->width);
break;
}
}
static void
tiff_done(void *data)
{
struct tiff_state *h = data;
TIFFClose(h->tif);
free(h->row);
free(h);
}
struct ida_loader tiff1_loader = {
magic: "MM\x00\x2a",
moff: 0,
mlen: 4,
name: "libtiff",
init: tiff_init,
read: tiff_read,
done: tiff_done,
};
struct ida_loader tiff2_loader = {
magic: "II\x2a\x00",
moff: 0,
mlen: 4,
name: "libtiff",
init: tiff_init,
read: tiff_read,
done: tiff_done,
};
#ifdef USE_X11
/* ---------------------------------------------------------------------- */
/* save */
static int
tiff_write(FILE *fp, struct ida_image *img)
{
TIFF *TiffHndl;
tdata_t buf;
int y;
TiffHndl = TIFFFdOpen(fileno(fp),NULL,"w");
if (TiffHndl == NULL)
return -1;
TIFFSetField(TiffHndl, TIFFTAG_IMAGEWIDTH, img->i.width);
TIFFSetField(TiffHndl, TIFFTAG_IMAGELENGTH, img->i.height);
TIFFSetField(TiffHndl, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(TiffHndl, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
TIFFSetField(TiffHndl, TIFFTAG_BITSPERSAMPLE, 8);
TIFFSetField(TiffHndl, TIFFTAG_SAMPLESPERPIXEL, 3);
TIFFSetField(TiffHndl, TIFFTAG_ROWSPERSTRIP, 2);
TIFFSetField(TiffHndl, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
#if 0 /* fixme: make this configureable */
TIFFSetField(TiffHndl, TIFFTAG_COMPRESSION, COMPRESSION_LZW);
TIFFSetField(TiffHndl, TIFFTAG_PREDICTOR, 2);
#endif
if (img->i.dpi) {
float dpi = img->i.dpi;
TIFFSetField(TiffHndl, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
TIFFSetField(TiffHndl, TIFFTAG_XRESOLUTION, dpi);
TIFFSetField(TiffHndl, TIFFTAG_YRESOLUTION, dpi);
}
for (y = 0; y < img->i.height; y++) {
buf = img->data + 3*img->i.width*y;
TIFFWriteScanline(TiffHndl, buf, y, 0);
}
TIFFClose(TiffHndl);
return 0;
}
struct ida_writer tiff_writer = {
label: "TIFF",
ext: { "tif", "tiff", NULL},
write: tiff_write,
};
#endif
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