mirror of https://github.com/bsnes-emu/bsnes.git
32 lines
768 B
C++
32 lines
768 B
C++
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#ifndef NALL_IMAGE_STATIC_HPP
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#define NALL_IMAGE_STATIC_HPP
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namespace nall {
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unsigned image::bitDepth(uint64_t color) {
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unsigned depth = 0;
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if(color) while((color & 1) == 0) color >>= 1;
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while((color & 1) == 1) { color >>= 1; depth++; }
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return depth;
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}
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unsigned image::bitShift(uint64_t color) {
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unsigned shift = 0;
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if(color) while((color & 1) == 0) { color >>= 1; shift++; }
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return shift;
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}
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uint64_t image::normalize(uint64_t color, unsigned sourceDepth, unsigned targetDepth) {
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if(sourceDepth == 0 || targetDepth == 0) return 0;
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while(sourceDepth < targetDepth) {
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color = (color << sourceDepth) | color;
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sourceDepth += sourceDepth;
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}
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if(targetDepth < sourceDepth) color >>= (sourceDepth - targetDepth);
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return color;
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}
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}
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#endif
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