57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
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#pragma once
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#include<hgl/type/DataType.h>
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namespace hgl
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{
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namespace bitmap
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{
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enum class BlendMode
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{
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NoBlend, ///<<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Alpha, ///<Alpha<68><61><EFBFBD><EFBFBD>
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Add, ///<<3C>ӷ<EFBFBD><D3B7><EFBFBD><EFBFBD><EFBFBD>
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Sub, ///<<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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};//enum class BlendMode
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template<typename T> struct BlendColor
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{
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BlendMode mode=BlendMode::NoBlend;
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public:
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virtual const T &BlendNoBlend(const T &src,const T &dst,const float alpha)
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{
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return src;
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}
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virtual const T &BlendAlpha(const T &src,const T &dst,const float alpha)
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{
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return src*alpha+dst*(1-alpha);
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}
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virtual const T &BlendAdd(const T &src,const T &dst,const float alpha)
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{
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return src*alpha+dst;
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}
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virtual const T &BlendSub(const T &src,const T &dst,const float alpha)
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{
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return src*alpha-dst;
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}
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virtual const T &Blend(const T &src,const T &dst,const float alpha)
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{
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switch(mode)
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{
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case BlendMode::NoBlend: return BlendNoBlend(src,dst,alpha);
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case BlendMode::Alpha: return BlendAlpha(src,dst,alpha);
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case BlendMode::Add: return BlendAdd(src,dst,alpha);
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case BlendMode::Sub: return BlendSub(src,dst,alpha);
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}
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return src;
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}
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};//template<typename T> class BlendColor
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}//namespace bitmap
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}//namespace hgl
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