import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/layers/TextureDIB.h

@@ -0,0 +1,132 @@
+/* -*- 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/. */
+
+#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:
+  virtual bool Lock(OpenMode) override { return true; }
+
+  virtual void Unlock() override {}
+
+  virtual void FillInfo(TextureData::Info& aInfo) const override;
+
+  virtual 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)
+  { }
+
+  virtual void DeallocateDeviceData() override;
+
+  virtual void SetCompositor(Compositor* aCompositor) override;
+
+  virtual Compositor* GetCompositor() override { return mCompositor; }
+
+  virtual gfx::SurfaceFormat GetFormat() const override { return mFormat; }
+
+  virtual gfx::IntSize GetSize() const override { return mSize; }
+
+  virtual bool Lock() override;
+
+  virtual void Unlock() override;
+
+  virtual bool HasIntermediateBuffer() const { return true; }
+
+  virtual bool BindTextureSource(CompositableTextureSourceRef& aTexture) override;
+
+protected:
+  RefPtr<DataTextureSource> mTextureSource;
+  RefPtr<Compositor> mCompositor;
+  gfx::SurfaceFormat mFormat;
+  gfx::IntSize mSize;
+  bool mIsLocked;
+};
+
+class DIBTextureHost : public TextureHostDirectUpload
+{
+public:
+  DIBTextureHost(TextureFlags aFlags,
+                 const SurfaceDescriptorDIB& aDescriptor);
+
+  virtual already_AddRefed<gfx::DataSourceSurface> GetAsSurface() override
+  {
+    return nullptr; // TODO: cf bug 872568
+  }
+
+protected:
+  virtual void UpdatedInternal(const nsIntRegion* aRegion = nullptr) override;
+
+  RefPtr<gfxWindowsSurface> mSurface;
+};
+
+class TextureHostFileMapping : public TextureHostDirectUpload
+{
+public:
+  TextureHostFileMapping(TextureFlags aFlags,
+                         const SurfaceDescriptorFileMapping& aDescriptor);
+  ~TextureHostFileMapping();
+
+  virtual 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:
+  virtual void UpdatedInternal(const nsIntRegion* aRegion = nullptr) override;
+
+  HANDLE mFileMapping;
+};
+
+}
+}
+
+#endif /* MOZILLA_GFX_TEXTUREDIB_H */