47 lines
1.5 KiB
Text
47 lines
1.5 KiB
Text
//Cg
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void vshader(
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float4 vtx_position : POSITION,
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float2 vtx_texcoord0 : TEXCOORD0,
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out float4 l_position : POSITION,
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out float2 l_texcoord0 : TEXCOORD0,
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out float2 l_texcoord1 : TEXCOORD1,
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uniform float4 texpad_tex,
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uniform float4x4 mat_modelproj)
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{
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l_position=mul(mat_modelproj, vtx_position);
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l_texcoord0 = vtx_position.xz * texpad_tex.xy + texpad_tex.xy;
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l_texcoord1 = l_position.xy;
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}
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void fshader(float2 l_texcoord1 : TEXCOORD1,
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float2 l_texcoord0 : TEXCOORD0,
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out float4 o_color : COLOR,
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uniform sampler2D k_tex : TEXUNIT0)
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{
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float4 color = tex2D(k_tex, l_texcoord0).rgba;
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float newred = (color.r * 0.338) + (color.g * 0.714) + (color.b * 0.134);
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float newgreen = (color.r * 0.294) + (color.g * 0.631) + (color.b * 0.113);
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float newblue = (color.r * 0.217) + (color.g * 0.479) + (color.b * 0.076);
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newred = clamp(newred, 0, 1);
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newgreen = clamp(newgreen, 0, 1);
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newblue = clamp(newblue, 0, 1);
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// create a vignette to simulate old optics
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float d = distance(float2(0.0, 0.0), l_texcoord1);
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float OuterVignetting = 1.6;
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float InnerVignetting = 0.6;
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float vignetting = clamp((OuterVignetting - d) / (OuterVignetting - InnerVignetting), 0.0, 1.0);
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// non-linear fade to prevent ugly border effect
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float diff = 1.0 - vignetting;
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float scale = 1.0 - (diff * diff);
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newred *= scale;
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newgreen *= scale;
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newblue *= scale;
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o_color = float4(newred, newgreen, newblue, 1);
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}
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