Bibliothèque de traitements d'images en virgule flottante.
http://la.buvette.org/photos/cumul/
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72 lines
1.7 KiB
72 lines
1.7 KiB
/*
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* FLOATIMG
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* rotation matricielle des images
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* #coronamaison Mon 23 Mar 2020 11:45:59 AM CET
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*/
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#include <stdio.h>
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#include <string.h>
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#include "../floatimg.h"
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extern int verbosity;
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/* --------------------------------------------------------------------- */
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int fimg_rotate_90(FloatImg *src, FloatImg *dst, int notused)
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{
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int foo;
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int x, y, k;
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float rgb[3];
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
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src, dst, notused);
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#endif
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if (src->type != FIMG_TYPE_RGB) {
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fprintf(stderr, "%s: src type %d not valid\n", __func__,
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src->type);
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return -6;
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}
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/* check if dst pic is not allocated */
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if ( 0 == (dst->type | dst->width | dst->height) ) {
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#if DEBUG_LEVEL
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fprintf(stderr, "in %s, %p is empty\n", __func__, dst);
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#endif
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/* OK allocate a new fpic */
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foo = fimg_create(dst, src->height, src->width, src->type);
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if (foo) {
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fprintf(stderr, "%s: err %d create new pic\n", __func__, foo);
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return -887;
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}
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// if (verbosity>1) fimg_describe(dst, "new pic");
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}
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/* check if dst and src are conpatibles */
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if ( (src->type != dst->type) ||
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(src->width != dst->height) || (src->height != dst->width) ) {
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fprintf(stderr, "%s: src & dst not compatibles\n", __func__);
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return -888;
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}
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/*
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* THIS IS A CRUDE IMPLEMENTATION
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*/
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for (y=0; y<src->height; y++) {
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for (x=0; x<src->width; x++) {
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fimg_get_rgb(src, x, y, rgb);
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// XXX ??? j = (dst->height - x) - 1;
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k = (dst->width - y) - 1;
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#if DEBUG_LEVEL > 1
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fprintf(stderr, "%6d %6d\n", k, j);
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#endif
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fimg_put_rgb(dst, k, x, rgb);
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}
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}
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/* we don't have any cleanup to make */
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return 0;
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}
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/* --------------------------------------------------------------------- */
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