Vendor things

third-party/vendor/wgpu-hal/examples/halmark/shader.wgsl

@@ -0,0 +1,50 @@
+struct Globals {
+    mvp: mat4x4<f32>,
+    size: vec2<f32>,
+    _pad0: u32,
+    _pad1: u32,
+};
+
+struct Locals {
+    position: vec2<f32>,
+    velocity: vec2<f32>,
+    color: u32,
+    _pad0: u32,
+    _pad1: u32,
+    _pad2: u32,
+};
+
+@group(0)
+@binding(0)
+var<uniform> globals: Globals;
+
+@group(1)
+@binding(0)
+var<uniform> locals: Locals;
+
+struct VertexOutput {
+    @builtin(position) position: vec4<f32>,
+    @location(0) tex_coords: vec2<f32>,
+    @location(1) color: vec4<f32>,
+};
+
+@vertex
+fn vs_main(@builtin(vertex_index) vi: u32) -> VertexOutput {
+    let tc = vec2<f32>(f32(vi & 1u), 0.5 * f32(vi & 2u));
+    let offset = vec2<f32>(tc.x * globals.size.x, tc.y * globals.size.y);
+    let pos = globals.mvp * vec4<f32>(locals.position + offset, 0.0, 1.0);
+    let color = vec4<f32>((vec4<u32>(locals.color) >> vec4<u32>(0u, 8u, 16u, 24u)) & vec4<u32>(255u)) / 255.0;
+    return VertexOutput(pos, tc, color);
+}
+
+@group(0)
+@binding(1)
+var tex: texture_2d<f32>;
+@group(0)
+@binding(2)
+var sam: sampler;
+
+@fragment
+fn fs_main(vertex: VertexOutput) -> @location(0) vec4<f32> {
+    return vertex.color * textureSampleLevel(tex, sam, vertex.tex_coords, 0.0);
+}