Joonas Rikkonen
49 lines
1.2 KiB
HLSL
49 lines
1.2 KiB
HLSL
// vim:ft=hlsl
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sampler TextureSampler : register(s0);
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float width;
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float height;
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float3 sobel(float2 uv)
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{
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float x = 0;
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float y = 0;
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float w = 1.0 / width;
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float h = 1.0 / height;
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x += tex2D(TextureSampler, uv + float2(-w, -h)) * -1.0;
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x += tex2D(TextureSampler, uv + float2(-w, 0)) * -2.0;
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x += tex2D(TextureSampler, uv + float2(-w, h)) * -1.0;
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x += tex2D(TextureSampler, uv + float2( w, -h)) * 1.0;
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x += tex2D(TextureSampler, uv + float2( w, 0)) * 2.0;
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x += tex2D(TextureSampler, uv + float2( w, h)) * 1.0;
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y += tex2D(TextureSampler, uv + float2(-w, -h)) * -1.0;
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y += tex2D(TextureSampler, uv + float2( 0, -h)) * -2.0;
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y += tex2D(TextureSampler, uv + float2( w, -h)) * -1.0;
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y += tex2D(TextureSampler, uv + float2(-w, h)) * 1.0;
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y += tex2D(TextureSampler, uv + float2( 0, h)) * 2.0;
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y += tex2D(TextureSampler, uv + float2( w, h)) * 1.0;
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return sqrt(x * x + y * y);
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}
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float4 blueprint(float4 position : SV_POSITION, float4 clr : COLOR0, float2 texCoord : TEXCOORD0) : COLOR0
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{
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float3 s = sobel(texCoord);
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float a = tex2D(TextureSampler, texCoord).a;
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a *= clr.a;
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return float4(clr.r + s.r, clr.g + s.g, clr.b + s.b, a);
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}
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technique Blueprint
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{
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pass Pass1
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{
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PixelShader = compile ps_4_0_level_9_1 blueprint();
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}
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}
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