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

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// OBS Default
uniform float4x4 ViewProj;
// Settings (Shared)
uniform texture2d u_image;
uniform float2 u_imageSize;
uniform float2 u_imageTexel;
uniform int u_radius;
uniform int u_diameter;
uniform float2 u_texelDelta;
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 = u_image.Sample(textureSampler, v_in.uv);
for (int k = 1; k <= u_radius; k++) {
rgba += u_image.Sample(textureSampler, v_in.uv + (u_texelDelta * k));
rgba += u_image.Sample(textureSampler, v_in.uv - (u_texelDelta * k));
}
rgba = rgba / u_diameter;
return rgba;
}
technique Draw
{
pass
{
vertex_shader = VSDefault(v_in);
pixel_shader = PSBox(v_in);
}
}