From 358d2369f868cf62c8f3836d19cb7dce971cca4a Mon Sep 17 00:00:00 2001
From: Matt Woodrow <mwoodrow@mozilla.com>
Date: Tue, 7 Jan 2014 17:20:22 +0100
Subject: [PATCH] Bug 900244 - Implement a shared D3D9 TextureClient. r=nical

---
 gfx/layers/d3d9/TextureD3D9.h | 49 +++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/gfx/layers/d3d9/TextureD3D9.h b/gfx/layers/d3d9/TextureD3D9.h
index baf2d95169c..6b7bc4f25ad 100644
--- a/gfx/layers/d3d9/TextureD3D9.h
+++ b/gfx/layers/d3d9/TextureD3D9.h
@@ -159,6 +159,55 @@ protected:
   bool mIterating;
 };
 
+class SharedTextureClientD3D9 : public TextureClient
+{
+public:
+  SharedTextureClientD3D9(gfx::SurfaceFormat aFormat, TextureFlags aFlags)
+  : TextureClient(aFlags)
+  , mFormat(aFormat)
+  {}
+
+  virtual bool IsAllocated() const MOZ_OVERRIDE { return !!mTexture; }
+
+  virtual bool ToSurfaceDescriptor(SurfaceDescriptor& aOutDescriptor) MOZ_OVERRIDE
+  {
+    MOZ_ASSERT(IsValid());
+    if (!IsAllocated()) {
+      return false;
+    }
+
+    aOutDescriptor = SurfaceDescriptorD3D10((WindowsHandle)(mHandle), mFormat);
+    return true;
+  }
+
+  void InitWith(IDirect3DTexture9* aTexture, HANDLE aSharedHandle, D3DSURFACE_DESC aDesc)
+  {
+    MOZ_ASSERT(!mTexture);
+    mTexture = aTexture;
+    mHandle = aSharedHandle;
+    mDesc = aDesc;
+  }
+
+  virtual gfx::IntSize GetSize() const
+  {
+    return gfx::IntSize(mDesc.Width, mDesc.Height);
+  }
+
+  virtual TextureClientData* DropTextureData() MOZ_OVERRIDE
+  {
+    mTexture = nullptr;
+    MarkInvalid();
+    return nullptr;
+  }
+
+private:
+  nsRefPtr<IDirect3DTexture9> mTexture;
+  gfx::SurfaceFormat mFormat;
+  HANDLE mHandle;
+  D3DSURFACE_DESC mDesc;
+};
+
+
 class CompositingRenderTargetD3D9 : public CompositingRenderTarget,
                                     public TextureSourceD3D9
 {