94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
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/*
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D'apres un article paru dans 'Pour la Science', et il faudrait
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que je retrouve les references exactes... Et je ,'ai meme pas
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la date de ce numero de la revue :(
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <malloc.h>
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#include "../tthimage.h"
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/*::------------------------------------------------------------------::*/
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int
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Image_photomaton_0(Image_Desc *src, Image_Desc *dst)
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{
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int x, y, w, h;
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int r, g, b;
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if (src->width & 1)
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{
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w = src->width - 1;
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fprintf(stderr, "photomaton: width is odd, ajust %d\n", w);
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}
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else
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w = src->width;
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if (src->height & 1)
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{
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h = src->height - 1;
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fprintf(stderr, "photomaton: height is odd, ajust %d\n", h);
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}
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else
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h = src->height;
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for (y=0; y<src->height/2; y++)
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{
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for (x=0; x<src->width/2; x++)
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{
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Image_getRGB(src, x*2, y*2, &r, &g, &b);
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Image_plotRGB(dst, x, y, r, g, b);
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Image_getRGB(src, (x*2)+1, y*2, &r, &g, &b);
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Image_plotRGB(dst, x+(src->width/2), y, r, g, b);
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Image_getRGB(src, x*2, (y*2)+1, &r, &g, &b);
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Image_plotRGB(dst, x, y+(src->height/2), r, g, b);
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Image_getRGB(src, (x*2)+1, (y*2)+1, &r, &g, &b);
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Image_plotRGB(dst, x+(src->width/2), y+(src->height/2), r,g,b);
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}
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}
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dst->modified = 1;
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return FUNC_NOT_FINISH;
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}
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/*::------------------------------------------------------------------::*/
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int
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Image_photomaton_n(Image_Desc *src, Image_Desc *dst, int nb)
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{
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Image_Desc *tmp;
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int foo;
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if (nb < 1)
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{
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fprintf(stderr, "photomaton_n: %d invalid\n", nb);
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return INVALID_PARAM;
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}
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tmp = Image_clone(src, 1); /* copier aussi les pixels */
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if (tmp==NULL)
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{
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fprintf(stderr, "no mem in %s %d %s\n", __FILE__, __LINE__, __func__);
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abort();
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}
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for (foo=0; foo<nb; foo++)
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{
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Image_photomaton_0(tmp, dst);
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Image_copy(dst, tmp);
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fprintf(stderr, "photomaton N: passe %d\n", foo);
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}
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Image_copy(tmp, dst);
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Image_DeAllocate(tmp); free(tmp);
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dst->modified = 1;
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return FUNC_NOT_FINISH;
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}
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/*::------------------------------------------------------------------::*/
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