1 files changed, 29 insertions, 0 deletions
diff --git a/third_party/rust/gfx-backend-dx12/shaders/blit.hlsl b/third_party/rust/gfx-backend-dx12/shaders/blit.hlsl
new file mode 100644
index 0000000000..bd15200980
--- /dev/null
+++ b/third_party/rust/gfx-backend-dx12/shaders/blit.hlsl
@@ -0,0 +1,29 @@
+
+Texture2DArray BlitSource : register(t0);
+SamplerState BlitSampler : register(s0);
+
+cbuffer Region : register(b0) {
+    float2 offset;
+    float2 extent;
+    float z;
+    float level;
+};
+
+struct VsOutput {
+    float4 pos: SV_POSITION;
+    float4 uv: TEXCOORD0;
+};
+
+// Create a screen filling triangle
+VsOutput vs_blit_2d(uint id: SV_VertexID) {
+    float2 coord = float2((id << 1) & 2, id & 2);
+    VsOutput output = {
+        float4(float2(-1.0, 1.0) + coord * float2(2.0, -2.0), 0.0, 1.0),
+        float4(offset + coord * extent, z, level)
+    };
+    return output;
+}
+
+float4 ps_blit_2d(VsOutput input) : SV_TARGET {
+    return BlitSource.SampleLevel(BlitSampler, input.uv.xyz, input.uv.w);
+}