pixel pipeline working

1 files changed, 25 insertions, 0 deletions

diff --git a/src/shader.wgsl b/src/shader.wgsl
new file mode 100644
index 0000000..e545dac
--- /dev/null
+++ b/src/shader.wgsl
@@ -0,0 +1,25 @@
+@group(0) @binding(0) var tex: texture_2d<f32>;
+
+struct VertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+    @location(0) uv: vec2<f32>,
+};
+
+@vertex
+fn vs_main(
+    @builtin(vertex_index) i: u32,
+) -> VertexOutput {
+    var out: VertexOutput;
+    let uv = vec2f(f32((i << 1u) & 2u), f32(i & 2u));
+    out.clip_position = vec4f(uv.x * 2.0 - 1.0, 1.0 - uv.y * 2.0, 0.0, 1.0);
+    out.uv = uv;
+
+    return out;
+}
+
+@fragment
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+    let dims = vec2f(textureDimensions(tex));
+    return textureLoad(tex, vec2i(in.uv * dims), 0);
+    // return vec4f(0.0, 1.0, 0.0, 1.0);
+}
\ No newline at end of file