1 files changed, 116 insertions, 0 deletions
diff --git a/gfx/layers/TextureDIB.h b/gfx/layers/TextureDIB.h
new file mode 100644
index 0000000000..707cd9ae3e
--- /dev/null
+++ b/gfx/layers/TextureDIB.h
@@ -0,0 +1,116 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef MOZILLA_GFX_TEXTUREDIB_H
+#define MOZILLA_GFX_TEXTUREDIB_H
+
+#include "mozilla/layers/Compositor.h"
+#include "mozilla/layers/TextureClient.h"
+#include "mozilla/layers/TextureHost.h"
+#include "mozilla/GfxMessageUtils.h"
+#include "gfxWindowsPlatform.h"
+
+namespace mozilla {
+namespace layers {
+
+class DIBTextureData : public TextureData {
+ public:
+  bool Lock(OpenMode) override { return true; }
+
+  void Unlock() override {}
+
+  void FillInfo(TextureData::Info& aInfo) const override;
+
+  already_AddRefed<gfx::DrawTarget> BorrowDrawTarget() override;
+
+  static DIBTextureData* Create(gfx::IntSize aSize, gfx::SurfaceFormat aFormat,
+                                LayersIPCChannel* aAllocator);
+
+ protected:
+  DIBTextureData(gfx::IntSize aSize, gfx::SurfaceFormat aFormat,
+                 gfxWindowsSurface* aSurface)
+      : mSurface(aSurface), mSize(aSize), mFormat(aFormat) {
+    MOZ_ASSERT(aSurface);
+  }
+
+  RefPtr<gfxWindowsSurface> mSurface;
+  gfx::IntSize mSize;
+  gfx::SurfaceFormat mFormat;
+};
+
+/**
+ * This is meant for a texture host which does a direct upload from
+ * Updated to a Compositor specific DataTextureSource and therefor doesn't
+ * need any specific Lock/Unlock magic.
+ */
+class TextureHostDirectUpload : public TextureHost {
+ public:
+  TextureHostDirectUpload(TextureFlags aFlags, gfx::SurfaceFormat aFormat,
+                          gfx::IntSize aSize)
+      : TextureHost(aFlags), mFormat(aFormat), mSize(aSize), mIsLocked(false) {}
+
+  void DeallocateDeviceData() override;
+
+  void SetTextureSourceProvider(TextureSourceProvider* aProvider) override;
+
+  gfx::SurfaceFormat GetFormat() const override { return mFormat; }
+
+  gfx::IntSize GetSize() const override { return mSize; }
+
+  bool Lock() override;
+
+  void Unlock() override;
+
+  bool HasIntermediateBuffer() const { return true; }
+
+  bool BindTextureSource(CompositableTextureSourceRef& aTexture) override;
+  bool AcquireTextureSource(CompositableTextureSourceRef& aTexture) override;
+
+ protected:
+  RefPtr<TextureSourceProvider> mProvider;
+  RefPtr<DataTextureSource> mTextureSource;
+  gfx::SurfaceFormat mFormat;
+  gfx::IntSize mSize;
+  bool mIsLocked;
+};
+
+class DIBTextureHost : public TextureHostDirectUpload {
+ public:
+  DIBTextureHost(TextureFlags aFlags, const SurfaceDescriptorDIB& aDescriptor);
+
+  already_AddRefed<gfx::DataSourceSurface> GetAsSurface() override {
+    return nullptr;  // TODO: cf bug 872568
+  }
+
+ protected:
+  void UpdatedInternal(const nsIntRegion* aRegion = nullptr) override;
+
+  RefPtr<gfxWindowsSurface> mSurface;
+};
+
+class TextureHostFileMapping : public TextureHostDirectUpload {
+ public:
+  TextureHostFileMapping(TextureFlags aFlags,
+                         const SurfaceDescriptorFileMapping& aDescriptor);
+  ~TextureHostFileMapping();
+
+  already_AddRefed<gfx::DataSourceSurface> GetAsSurface() override {
+    MOZ_CRASH("GFX: TextureHostFileMapping::GetAsSurface not implemented");
+    // Not implemented! It would be tricky to keep track of the
+    // scope of the file mapping. We could do this through UserData
+    // on the DataSourceSurface but we don't need this right now.
+  }
+
+ protected:
+  void UpdatedInternal(const nsIntRegion* aRegion = nullptr) override;
+
+  HANDLE mFileMapping;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif /* MOZILLA_GFX_TEXTUREDIB_H */