mirror of https://github.com/Xaymar/obs-StreamFX
60 lines
1.3 KiB
Plaintext
60 lines
1.3 KiB
Plaintext
uniform float4x4 ViewProj;
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uniform texture2d image;
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uniform float2 texel;
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uniform int widthHalf;
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uniform int width;
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sampler_state textureSampler {
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Filter = Point;
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AddressU = Clamp;
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AddressV = Clamp;
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};
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struct VertDataIn {
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float4 pos : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct VertDataOut {
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float4 pos : POSITION;
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float2 uv : TEXCOORD0;
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};
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VertDataOut VSDefault(VertDataIn v_in)
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{
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VertDataOut vert_out;
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vert_out.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);
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vert_out.uv = v_in.uv;
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return vert_out;
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}
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// Gaussian Blur
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float Gaussian(float x, float o) {
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const float pivalue = 3.1415926535897932384626433832795;
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return (1.0 / (o * sqrt(2.0 * pivalue))) * exp((-(x * x)) / (2 * (o * o)));
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}
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float4 PSGaussian(VertDataOut v_in) : TARGET {
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const float pivalue = 3.1415926535897932384626433832795;
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float4 rgba = image.Sample(textureSampler, v_in.uv) * Gaussian(0, width / pivalue);
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float2 uvoffset = texel;
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for (int k = 1; k <= widthHalf; k++) {
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float g = Gaussian(k, width / pivalue);
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float4 spos = image.Sample(textureSampler, v_in.uv + uvoffset) * g;
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float4 sneg = image.Sample(textureSampler, v_in.uv - uvoffset) * g;
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rgba += spos + sneg;
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uvoffset += texel;
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}
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return rgba;
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}
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technique Draw
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{
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pass
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{
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vertex_shader = VSDefault(v_in);
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pixel_shader = PSGaussian(v_in);
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}
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}
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