1 files changed, 52 insertions, 0 deletions
diff --git a/gfx/layers/d3d11/mlgshaders/blend-vs.hlsl b/gfx/layers/d3d11/mlgshaders/blend-vs.hlsl
new file mode 100644
index 0000000000..db873e34a2
--- /dev/null
+++ b/gfx/layers/d3d11/mlgshaders/blend-vs.hlsl
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "common-vs.hlsl"
+#include "blend-common.hlsl"
+#include "textured-common.hlsl"
+
+cbuffer BlendConstants : register(b4)
+{
+  float4x4 mBackdropTransform;
+}
+
+float2 BackdropPosition(float4 aPosition)
+{
+  // Move the position from clip space (-1,1) into 0..1 space.
+  float2 pos;
+  pos.x = (aPosition.x + 1.0) / 2.0;
+  pos.y = 1.0 - (aPosition.y + 1.0) / 2.0;
+
+  return mul(mBackdropTransform, float4(pos.xy, 0, 1.0)).xy;
+}
+
+VS_BLEND_OUTPUT BlendImpl(const VertexInfo aInfo, float2 aTexCoord)
+{
+  VS_BLEND_OUTPUT output;
+  output.vPosition = aInfo.worldPos;
+  output.vTexCoords = aTexCoord;
+  output.vBackdropCoords = BackdropPosition(output.vPosition);
+  output.vLocalPos = aInfo.screenPos;
+  output.vClipRect = aInfo.clipRect;
+  output.vMaskCoords = aInfo.maskCoords;
+  return output;
+}
+
+VS_BLEND_OUTPUT BlendVertexVS(const VS_TEXTUREDVERTEX aVertex)
+{
+  float2 layerPos = UnitTriangleToPos(
+    aVertex.vUnitPos,
+    aVertex.vPos1,
+    aVertex.vPos2,
+    aVertex.vPos3);
+
+  float2 texCoord = UnitTriangleToPos(
+    aVertex.vUnitPos,
+    aVertex.vTexCoord1,
+    aVertex.vTexCoord2,
+    aVertex.vTexCoord3);
+
+  VertexInfo info = ComputePosition(layerPos, aVertex.vLayerId, aVertex.vDepth);
+  return BlendImpl(info, texCoord);
+}