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