21 lines
503 B
HLSL
21 lines
503 B
HLSL
sampler2D inputTex : register(S0);
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//范围-1~1
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float brightness : register(C0);
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//范围-1~1
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float contrast : register(C1);
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static const float PI = 3.14159265f;
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float4 main(float2 uv : TEXCOORD) : COLOR
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{
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//UI的源颜色
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float4 sourceColor = tex2D(inputTex, uv);
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//计算对比度系数
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float k = tan((45 + 44 * contrast) / 180 * PI);
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//计算亮度对比度
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float4 outColor = (sourceColor - 0.5 * (1 - brightness)) * k + 0.5 * (1 + brightness);
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return outColor;
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}
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