Bibliothèque de traitements d'images en virgule flottante.
http://la.buvette.org/photos/cumul/
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89 lines
2.1 KiB
89 lines
2.1 KiB
/*
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* FLOATIMG
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* import/export to/from TIFF files
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <tiffio.h>
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#include "../floatimg.h"
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/* --------------------------------------------------------------------- */
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extern int verbosity;
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/* --------------------------------------------------------------------- */
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int fimg_write_as_tiff(FloatImg *src, char *fname, int flags)
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{
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TIFF *tiff;
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unsigned short *linebuff, *ptr;
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int x, y, idx, foo;
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char ligne[100];
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double maximum, fk;
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/* bon, tout cela semble bien tortueux ! */
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if (FIMG_TYPE_RGB != src->type) {
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fprintf(stderr, "%s: src bad type %d\n", __func__, src->type);
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return -2;
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}
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linebuff = calloc(src->width, 3*sizeof(unsigned short));
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if (NULL==linebuff) {
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fprintf(stderr, "%s: fatal memory error\n", __func__);
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return -7;
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}
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maximum = (double)fimg_get_maxvalue(src);
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fk = maximum / 65535.0;
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if (verbosity) {
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fprintf(stderr, "%s : maxv %f fk %f\n", __func__, maximum, fk);
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}
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tiff = TIFFOpen(fname, "w");
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if (NULL==tiff) {
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return -6;
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}
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TIFFSetField(tiff, TIFFTAG_IMAGEWIDTH, src->width);
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TIFFSetField(tiff, TIFFTAG_IMAGELENGTH, src->height);
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TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, 3); // RGB
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TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 16); // 0->65535
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TIFFSetField(tiff, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
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TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
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sprintf(ligne, "lib FloatImg v %d by tTh", FIMG_VERSION);
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TIFFSetField(tiff, TIFFTAG_SOFTWARE, ligne);
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foo = src->width * 3;
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foo = TIFFDefaultStripSize(tiff, foo);
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if (verbosity) fprintf(stderr, "default strip size %d\n", foo);
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TIFFSetField(tiff, TIFFTAG_ROWSPERSTRIP, foo);
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for (y=0; y<src->height; y++) {
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ptr = linebuff;
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idx = y * src->width;
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for (x=0; x<src->width; x++) {
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*ptr++ = (unsigned short) (src->R[idx] / fk);
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*ptr++ = (unsigned short) (src->G[idx] / fk);
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*ptr++ = (unsigned short) (src->B[idx] / fk);
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idx++;
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}
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TIFFWriteScanline(tiff, linebuff, y, 0);
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idx += src->width;
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}
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TIFFClose(tiff);
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free(linebuff);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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