1// This shader draws the color plane in various color spaces.
2#import bevy_ui::ui_vertex_output::UiVertexOutput
3#import bevy_render::color_operations::{
4    srgb_to_linear_rgb,
5    hsl_to_linear_rgb,
6}
7
8struct ColorPlaneUniform {
9  fixed_channel : f32,
10#ifdef SIXTEEN_BYTE_ALIGNMENT
11  _webgl2_padding_12b : vec3<f32>,
12#endif
13}
14
15@group(1) @binding(0) var<uniform> uniform_data : ColorPlaneUniform;
16
17@fragment
18fn fragment(in: UiVertexOutput) -> @location(0) vec4<f32> {
19    let uv = in.uv;
20#ifdef PLANE_RG
21    return vec4(srgb_to_linear_rgb(vec3(uv.x, uv.y, uniform_data.fixed_channel)), 1.0);
22#else ifdef PLANE_RB
23    return vec4(srgb_to_linear_rgb(vec3(uv.x, uniform_data.fixed_channel, uv.y)), 1.0);
24#else ifdef PLANE_GB
25    return vec4(srgb_to_linear_rgb(vec3(uniform_data.fixed_channel, uv.x, uv.y)), 1.0);
26#else ifdef PLANE_HS
27    return vec4(hsl_to_linear_rgb(vec3(uv.x, 1.0 - uv.y, uniform_data.fixed_channel)), 1.0);
28#else ifdef PLANE_HL
29    return vec4(hsl_to_linear_rgb(vec3(uv.x, uniform_data.fixed_channel, 1.0 - uv.y)), 1.0);
30#else
31    // Error color
32    return vec4(1.0, 0.0, 1.0, 1.0);
33#endif
34}