61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
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/*
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* extractbits.c
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* new 11 mars 2014
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*/
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#include <stdio.h>
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#include "../tthimage.h"
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/*::------------------------------------------------------------------::*/
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int Image_extrbits_0(Image_Desc *src, Image_Desc *dst, int rs, int gs, int bs)
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{
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int x, y, foo;
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int mr, mg, mb, r, g, b;
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#if DEBUG_LEVEL
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fprintf(stderr, "%s ( %p %p %d %d %d )\n", __func__, src, dst, rs, gs, bs);
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#endif
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if ( rs<0 || gs<0 || bs<0 ) {
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fprintf(stderr, "%s : no negativ shift\n", __func__);
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return BAD_PARAMETER;
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}
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if ( rs>8 || gs>8 || bs>8 ) {
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fprintf(stderr, "%s : no shift > 7\n", __func__);
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return BAD_PARAMETER;
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}
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if ( (foo=Image_compare_desc(src, dst)) ) {
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fprintf(stderr, "%s: images are differents %d\n", __func__, foo);
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return foo;
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}
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mr = 1 << rs;
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mg = 1 << gs;
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mb = 1 << bs;
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#if DEBUG_LEVEL
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fprintf(stderr, "%s masques = 0x%02x 0X%02x 0x%02x\n", __func__, mr, mg, mb);
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#endif
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for (y=0; y<dst->height; y++)
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{
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for (x=0; x<dst->width; x++)
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{
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r = ((src->Rpix[y])[x] & mr) ? 255 : 0;
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dst->Rpix[y][x] = r;
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g = ((src->Gpix[y])[x] & mg) ? 255 : 0;
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dst->Gpix[y][x] = g;
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b = ((src->Bpix[y])[x] & mb) ? 255 : 0;
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dst->Bpix[y][x] = b;
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}
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}
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return FUNC_IS_BETA;
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}
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/*::------------------------------------------------------------------::*/
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/*::------------------------------------------------------------------::*/
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/*::------------------------------------------------------------------::*/
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