186 lines
3.5 KiB
C
186 lines
3.5 KiB
C
/*
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* quadpics.c - jeux sur les symetries - juin 2014 a Myrys
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "../tthimage.h"
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/*::------------------------------------------------------------------::*/
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/*
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* fonction de test, ne pas utiliser, le wrapper est un
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* peu plus bas.
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*/
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int Image_quadpics_proto_0(Image_Desc *img, int k)
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{
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Image_Desc *tmp;
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int x, y, r, g, b;
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int dims;
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#if DEBUG_LEVEL
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fprintf(stderr, ">> %s ( %p %d )\n", __func__, img, k);
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#endif
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/* duplicate the image */
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if (NULL==(tmp=Image_clone(img, 0)))
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{
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fprintf(stderr, "in %s, no mem for cloning %p\n", __func__, img);
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#if FORCE_ABORT
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abort();
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#endif
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return IMAGE_NO_MEM;
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}
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dims = img->width / 2;
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#if DEBUG_LEVEL
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fprintf(stderr, " dim/2 -> %d\n", dims);
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#endif
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for (y=0; y<dims; y++)
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{
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for (x=0; x<dims; x++)
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{
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/* first, grab the value */
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r = img->Rpix[y*2][x*2];
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g = img->Gpix[y*2][x*2];
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b = img->Bpix[y*2][x*2];
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/* upper left */
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tmp->Rpix[y][x] = r;
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tmp->Gpix[y][x] = g;
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tmp->Bpix[y][x] = b;
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/* upper right */
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tmp->Rpix[y][dims+dims-x-1] = r;
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tmp->Gpix[y][dims+dims-x-1] = g;
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tmp->Bpix[y][dims+dims-x-1] = b;
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/* lower left */
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tmp->Rpix[dims+dims-y-1][x] = r;
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tmp->Gpix[dims+dims-y-1][x] = g;
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tmp->Bpix[dims+dims-y-1][x] = b;
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/* lower right */
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tmp->Rpix[dims+dims-y-1][dims+dims-x-1] = r;
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tmp->Gpix[dims+dims-y-1][dims+dims-x-1] = g;
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tmp->Bpix[dims+dims-y-1][dims+dims-x-1] = b;
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}
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}
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/* copy tmp pics to caller's img */
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Image_copy(tmp, img);
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/* kill duplicate */
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Image_DeAllocate(tmp); free(tmp);
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return 666;
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}
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/*::------------------------------------------------------------------::*/
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int Image_quadpics_proto_1(Image_Desc *img, Image_Desc *dst)
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{
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int x, y, r, g, b;
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int dims;
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#if DEBUG_LEVEL
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fprintf(stderr, ">> %s ( %p %p )\n", __func__, img, dst);
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#endif
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dims = img->width / 2;
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#if DEBUG_LEVEL
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fprintf(stderr, " dim/2 -> %d\n", dims);
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#endif
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for (y=0; y<dims; y++)
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{
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for (x=0; x<dims; x++)
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{
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/* first, grab the value */
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r = img->Rpix[y*2][x*2];
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g = img->Gpix[y*2][x*2];
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b = img->Bpix[y*2][x*2];
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/* upper left */
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dst->Rpix[y][x] = r;
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dst->Gpix[y][x] = g;
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dst->Bpix[y][x] = b;
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/* upper right */
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dst->Rpix[x][y+dims] = r;
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dst->Gpix[x][y+dims] = 0;
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dst->Bpix[x][y+dims] = 0;
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/* lower leftt */
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dst->Rpix[x+dims][y] = r;
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dst->Gpix[x+dims][y] = g;
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dst->Bpix[x+dims][y] = b;
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}
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}
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return 666;
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}
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/*::------------------------------------------------------------------::*/
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/*
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* wrapper for simplest functions
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*/
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int Image_quadsym_simple(Image_Desc *src, Image_Desc *dst, int mode)
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{
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int foo;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, src, dst, mode);
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#endif
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/*
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* check validity of both images
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*/
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if ( src->width != src->height )
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{
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fprintf(stderr, "in %s, source img %p is not square.\n", __func__, src);
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#if FORCE_ABORT
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abort();
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#endif
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return UNKNOW_ERROR;
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}
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if ( foo=Image_compare_desc(src, dst) )
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{
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fprintf(stderr, "err dims %d\n", foo);
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return foo;
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}
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/* all things all right ? Ok, go compute 4picz */
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foo = UNKNOW_ERROR; /* assume broken code */
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switch (mode)
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{
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case -1:
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fprintf(stderr, "Magic Cow enabled\n");
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break;
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case 0:
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Image_copy(src,dst);
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foo = Image_quadpics_proto_0(dst, mode);
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break;
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case 1:
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Image_copy(src,dst);
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foo = Image_quadpics_proto_1(src, dst);
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break;
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default:
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fprintf(stderr, "Magic Cow disabled\n");
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break;
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}
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#if DEBUG_LEVEL
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fprintf(stderr, "in %s, action return code was %d\n", __func__, foo);
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#endif
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return 666;
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}
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/*::------------------------------------------------------------------::*/
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