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    log_flags: vec2<u32>,
10    _pad: vec2<u32>,
11}
12
13@group(0) @binding(0)
14var<uniform> uDirect: DirectUniforms;
15
16@group(1) @binding(0)
17var imgSampler: sampler;
18
19@group(1) @binding(1)
20var imgTex: texture_2d<f32>;
21
22struct VSIn {
23    @location(0) position: vec3<f32>,
24    @location(3) uv: vec2<f32>,
25}
26
27struct VSOut {
28    @builtin(position) clip_position: vec4<f32>,
29    @location(0) uv: vec2<f32>,
30}
31
32fn transform_axis(value: f32, is_log: u32) -> f32 {
33    if (is_log != 0u) {
34        if (value <= 0.0) {
35            return 1e30;
36        }
37        return log(value) / log(10.0);
38    }
39    return value;
40}
41
42@vertex
43fn vs_main(input: VSIn) -> VSOut {
44    var out: VSOut;
45    let data_min = vec2<f32>(
46        transform_axis(uDirect.data_min.x, uDirect.log_flags.x),
47        transform_axis(uDirect.data_min.y, uDirect.log_flags.y)
48    );
49    let data_max = vec2<f32>(
50        transform_axis(uDirect.data_max.x, uDirect.log_flags.x),
51        transform_axis(uDirect.data_max.y, uDirect.log_flags.y)
52    );
53    let position = vec2<f32>(
54        transform_axis(input.position.x, uDirect.log_flags.x),
55        transform_axis(input.position.y, uDirect.log_flags.y)
56    );
57    let data_range = data_max - data_min;
58    let viewport_range = uDirect.viewport_max - uDirect.viewport_min;
59    let normalized = (position - data_min) / data_range;
60    let ndc = uDirect.viewport_min + normalized * viewport_range;
61    out.clip_position = vec4<f32>(ndc, 0.0, 1.0);
62    out.uv = input.uv;
63    return out;
64}
65
66@fragment
67fn fs_main(input: VSOut) -> @location(0) vec4<f32> {
68    let color = textureSample(imgTex, imgSampler, input.uv);
69    return color;
70}
71"#;
runmat_plot/gpu/shaders/vertex/image_direct.rs

runmat_plot/gpu/shaders/vertex/
image_direct.rs
