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