struct VertexOut { @builtin(position) clip: vec4, @location(0) texcoord: vec2, }; @group(0) @binding(0) var texture: texture_2d; @group(0) @binding(1) var texture_sampler: sampler; @vertex fn vs_main(@builtin(vertex_index) vertex_index: u32) -> VertexOut { let x = i32(vertex_index) / 2; let y = i32(vertex_index) & 1; return VertexOut( vec4(f32(x) * 4.0 - 1.0, 1.0 - f32(y) * 4.0, 0.0, 1.0), vec2(f32(x) * 2.0, f32(y) * 2.0) ); } @fragment fn fs_main(vertex: VertexOut) -> @location(0) vec4 { return textureSample(texture, texture_sampler, vertex.texcoord); }