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runmat_plot/gpu/shaders/vertex/
image_direct.rs

1pub const SHADER: &str = r#"// Image shader with direct data->viewport mapping
2
3struct DirectUniforms {
4    data_min: vec2<f32>,
5    data_max: vec2<f32>,
6    viewport_min: vec2<f32>,
7    viewport_max: vec2<f32>,
8    viewport_px: vec2<f32>,
9}
10
11@group(0) @binding(0)
12var<uniform> uDirect: DirectUniforms;
13
14@group(1) @binding(0)
15var imgSampler: sampler;
16
17@group(1) @binding(1)
18var imgTex: texture_2d<f32>;
19
20struct VSIn {
21    @location(0) position: vec3<f32>,
22    @location(3) uv: vec2<f32>,
23}
24
25struct VSOut {
26    @builtin(position) clip_position: vec4<f32>,
27    @location(0) uv: vec2<f32>,
28}
29
30@vertex
31fn vs_main(input: VSIn) -> VSOut {
32    var out: VSOut;
33    let data_range = uDirect.data_max - uDirect.data_min;
34    let viewport_range = uDirect.viewport_max - uDirect.viewport_min;
35    let normalized = (input.position.xy - uDirect.data_min) / data_range;
36    let ndc = uDirect.viewport_min + normalized * viewport_range;
37    out.clip_position = vec4<f32>(ndc, 0.0, 1.0);
38    out.uv = input.uv;
39    return out;
40}
41
42@fragment
43fn fs_main(input: VSOut) -> @location(0) vec4<f32> {
44    let color = textureSample(imgTex, imgSampler, input.uv);
45    return color;
46}
47"#;