obs-StreamFX/data/effects/box-blur.effect

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uniform float4x4 ViewProj;
uniform texture2d image;
uniform float2 texel;
uniform int widthHalf;
uniform int width;
sampler_state textureSampler {
Filter = Point;
AddressU = Clamp;
AddressV = Clamp;
};
struct VertDataIn {
float4 pos : POSITION;
float2 uv : TEXCOORD0;
};
struct VertDataOut {
float4 pos : POSITION;
float2 uv : TEXCOORD0;
};
VertDataOut VSDefault(VertDataIn v_in)
{
VertDataOut vert_out;
vert_out.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);
vert_out.uv = v_in.uv;
return vert_out;
}
// Box Blur
float4 PSBox(VertDataOut v_in) : TARGET
{
float4 rgba = float4(0,0,0,0);
for (int k = -widthHalf; k <= widthHalf; k++) {
rgba += image.Sample(textureSampler, v_in.uv + (texel * k));
}
rgba = rgba / width;
return rgba;
}
technique Draw
{
pass
{
vertex_shader = VSDefault(v_in);
pixel_shader = PSBox(v_in);
}
}