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wgpu: Sum up all center blur pixels before multiplying

This commit is contained in:
Nathan Adams 2023-07-17 22:15:36 +02:00
parent 18e343c6ad
commit a35ea3d9f2
1 changed files with 3 additions and 1 deletions
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4
render/wgpu/shaders/filter/blur.wgsl
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@ -47,10 +47,12 @@ fn main_fragment(in: filter::VertexOutput) -> @location(0) vec4<f32> {
}
// At this point, the center_length must be a whole number, divisible by 2.
var center = vec4<f32>();
for (var i = 0.0; i < center_length; i += 2.0) {
// The center of the kernel is always going to be 1,1 weight pairs. We can just sample between the two pixels.
total += textureSample(texture, texture_sampler, in.uv + (direction * (1.5 + i))) * 2.0;
center += textureSample(texture, texture_sampler, in.uv + (direction * (1.5 + i)));
}
total += center * 2.0;
// The sum of every weight is full_size
return total / filter_args.full_size;