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finish fast_crt shader

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Dennis Ranke
2022-07-12 00:22:05 +02:00
parent ba0b037ec2
commit e9a5f702b4
2 changed files with 11 additions and 3 deletions
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12
uw8-window/src/gpu/fast_crt.wgsl
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@@ -29,6 +29,11 @@ fn row_factor(offset: f32) -> f32 {
return 1.0 / (1.0 + offset * offset * 16.0);
}
fn col_factor(offset: f32) -> f32 {
let offset = max(0.0, abs(offset) - 0.4);
return 1.0 / (1.0 + offset * offset * 16.0);
}
@fragment
fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
let base = round(in.tex_coords) - vec2<f32>(0.5);
@@ -39,8 +44,11 @@ fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
let v = base.y + bottom_factor / (bottom_factor + top_factor);
let u = in.tex_coords.x;
let left_factor = col_factor(frac.x);
let right_factor = col_factor(frac.x - 1.0);
return textureSample(screen_texture, linear_sampler, vec2<f32>(u, v) / vec2<f32>(320.0, 240.0)) * (top_factor + bottom_factor) * 2.0;
let u = base.x + right_factor / (right_factor + left_factor);
return textureSample(screen_texture, linear_sampler, vec2<f32>(u, v) / vec2<f32>(320.0, 240.0)) * (top_factor + bottom_factor) * (left_factor + right_factor) * 1.1;
}