29 行
708 B
C++
29 行
708 B
C++
#pragma once
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namespace nall {
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inline auto image::bitDepth(u64 color) -> u32 {
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u32 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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inline auto image::bitShift(u64 color) -> u32 {
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u32 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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inline auto image::normalize(u64 color, u32 sourceDepth, u32 targetDepth) -> u64 {
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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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