44 lines
1004 B
HLSL
44 lines
1004 B
HLSL
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// Texture size to calculate texel center
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float2 TextureSize;
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// Vertex shader output struct
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struct VS_OUTPUT
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{
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float4 Position : POSITION0;
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float2 TexCoords : TEXCOORD0;
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};
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VS_OUTPUT vertexMain(
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float4 Position : POSITION0,
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float2 TexCoords : TEXCOORD0
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)
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{
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VS_OUTPUT OUT;
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OUT.Position = Position;
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// In practice, instead of passing in TextureSize,
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// pass 1.0 / TextureSize for better performance
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// TexCoords is set to the texel center
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OUT.TexCoords = TexCoords + 1.0 / TextureSize / 2.0;
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return OUT;
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}
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// Texture sampler
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sampler2D TextureSampler;
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float4 pixelMain ( float2 Texcoords : TEXCOORD0 ) : COLOR0
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{
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// Texture is sampled at Texcoords using tex2D
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float4 Color = tex2D(TextureSampler, Texcoords);
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// Change Texcoords to sample pixels around
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// Inverse the color to produce negative image effect
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Color.rgb = 1.0 - Color.rgb;
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return Color;
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};
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