帮助像素着色器的亮度和对比度效果 [英] Help with Pixel Shader effect for brightness and contrast
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问题描述
应用亮度和对比度的简单像素着色器脚本效果是什么?
What is a simple pixel shader script effect to apply brightness and contrast?
我找到了这个,但似乎不正确:
I found this one, but it doesn't seem to be correct:
sampler2D input : register(s0);
float brightness : register(c0);
float contrast : register(c1);
float4 main(float2 uv : TEXCOORD) : COLOR
{
float4 color = tex2D(input, uv);
float4 result = color;
result = color + brightness;
result = result * (1.0+contrast)/1.0;
return result;
}
谢谢!
推荐答案
这是您要找的吗?
float Brightness : register(C0);
float Contrast : register(C1);
sampler2D Texture1Sampler : register(S0);
float4 main(float2 uv : TEXCOORD) : COLOR
{
float4 pixelColor = tex2D(Texture1Sampler, uv);
pixelColor.rgb /= pixelColor.a;
// Apply contrast.
pixelColor.rgb = ((pixelColor.rgb - 0.5f) * max(Contrast, 0)) + 0.5f;
// Apply brightness.
pixelColor.rgb += Brightness;
// Return final pixel color.
pixelColor.rgb *= pixelColor.a;
return pixelColor;
}
--- 使用 Shazzam Shader Editor 进行测试http://shazzam-tool.com
--- Tested with Shazzam Shader Editor http://shazzam-tool.com
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