1#ifdef TONEMAP_IN_SHADER
2#import bevy_core_pipeline::tonemapping
3#endif
4
5#import bevy_render::{
6    maths::affine3_to_square,
7    view::View,
8}
9
10#import bevy_sprite::sprite_view_bindings::view
11
12struct VertexInput {
13    @builtin(vertex_index) index: u32,
14    // NOTE: Instance-rate vertex buffer members prefixed with i_
15    // NOTE: i_model_transpose_colN are the 3 columns of a 3x4 matrix that is the transpose of the
16    // affine 4x3 model matrix.
17    @location(0) i_model_transpose_col0: vec4<f32>,
18    @location(1) i_model_transpose_col1: vec4<f32>,
19    @location(2) i_model_transpose_col2: vec4<f32>,
20    @location(3) i_color: vec4<f32>,
21    @location(4) i_uv_offset_scale: vec4<f32>,
22}
23
24struct VertexOutput {
25    @builtin(position) clip_position: vec4<f32>,
26    @location(0) uv: vec2<f32>,
27    @location(1) @interpolate(flat) color: vec4<f32>,
28};
29
30@vertex
31fn vertex(in: VertexInput) -> VertexOutput {
32    var out: VertexOutput;
33
34    let vertex_position = vec3<f32>(
35        f32(in.index & 0x1u),
36        f32((in.index & 0x2u) >> 1u),
37        0.0
38    );
39
40    out.clip_position = view.clip_from_world * affine3_to_square(mat3x4<f32>(
41        in.i_model_transpose_col0,
42        in.i_model_transpose_col1,
43        in.i_model_transpose_col2,
44    )) * vec4<f32>(vertex_position, 1.0);
45    out.uv = vec2<f32>(vertex_position.xy) * in.i_uv_offset_scale.zw + in.i_uv_offset_scale.xy;
46    out.color = in.i_color;
47
48    return out;
49}
50
51@group(1) @binding(0) var sprite_texture: texture_2d<f32>;
52@group(1) @binding(1) var sprite_sampler: sampler;
53
54@fragment
55fn fragment(in: VertexOutput) -> @location(0) vec4<f32> {
56    var color = in.color * textureSample(sprite_texture, sprite_sampler, in.uv);
57
58#ifdef TONEMAP_IN_SHADER
59    color = tonemapping::tone_mapping(color, view.color_grading);
60#endif
61
62    return color;
63}