62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
// tmerge.c - C Texture merge routines for use with D1X
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// Ripped from ldescent by <dph-man@iname.com>
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#include <conf.h>
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#ifdef NO_ASM // If for some reason we have elected not to use assembler...
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#include "gr.h"
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void gr_merge_textures( ubyte * lower, ubyte * upper, ubyte * dest )
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{
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int x,y;
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ubyte c;
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for (y=0;y<64;y++) for (x=0;x<64;x++) {
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c=upper[64*y+x];
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if (c==TRANSPARENCY_COLOR)
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c=lower[64*y+x];
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*dest++=c;
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}
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}
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void gr_merge_textures_1( ubyte * lower, ubyte * upper, ubyte * dest )
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{
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int x,y;
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ubyte c;
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for (y=0; y<64; y++ )
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for (x=0; x<64; x++ ) {
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c = upper[ 64*x+(63-y) ];
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if (c==TRANSPARENCY_COLOR)
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c = lower[ 64*y+x ];
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*dest++ = c;
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}
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}
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void gr_merge_textures_2( ubyte * lower, ubyte * upper, ubyte * dest )
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{
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int x,y;
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ubyte c;
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for (y=0; y<64; y++ )
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for (x=0; x<64; x++ ) {
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c = upper[ 64*(63-y)+(63-x) ];
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if (c==TRANSPARENCY_COLOR)
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c = lower[ 64*y+x ];
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*dest++ = c;
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}
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}
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void gr_merge_textures_3( ubyte * lower, ubyte * upper, ubyte * dest )
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{
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int x,y;
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ubyte c;
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for (y=0; y<64; y++ )
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for (x=0; x<64; x++ ) {
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c = upper[ 64*(63-x)+y ];
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if (c==TRANSPARENCY_COLOR)
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c = lower[ 64*y+x ];
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*dest++ = c;
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}
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}
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#endif
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