1 files changed, 58 insertions, 0 deletions
diff --git a/widget/android/AndroidDirectTexture.h b/widget/android/AndroidDirectTexture.h
new file mode 100644
index 000000000..8582b8582
--- /dev/null
+++ b/widget/android/AndroidDirectTexture.h
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 AndroidDirectTexture_h_
+#define AndroidDirectTexture_h_
+
+#include "gfxTypes.h"
+#include "mozilla/Mutex.h"
+#include "AndroidGraphicBuffer.h"
+#include "nsRect.h"
+
+namespace mozilla {
+
+/**
+ * This is a thread safe wrapper around AndroidGraphicBuffer that handles
+ * double buffering. Each call to Bind() flips the buffer when necessary.
+ *
+ * You need to be careful when destroying an instance of this class. If either
+ * buffer is locked by the application of the driver/hardware, bad things will
+ * happen. Be sure that the OpenGL texture is no longer on the screen.
+ */
+class AndroidDirectTexture
+{
+public:
+  AndroidDirectTexture(uint32_t width, uint32_t height, uint32_t usage, gfxImageFormat format);
+  virtual ~AndroidDirectTexture();
+
+  bool Lock(uint32_t usage, unsigned char **bits);
+  bool Lock(uint32_t usage, const nsIntRect& rect, unsigned char **bits);
+  bool Unlock(bool aFlip = true);
+
+  bool Reallocate(uint32_t aWidth, uint32_t aHeight);
+  bool Reallocate(uint32_t aWidth, uint32_t aHeight, gfxImageFormat aFormat);
+
+  uint32_t Width() { return mWidth; }
+  uint32_t Height() { return mHeight; }
+
+  bool Bind();
+
+private:
+  mozilla::Mutex mLock;
+  bool mNeedFlip;
+
+  uint32_t mWidth;
+  uint32_t mHeight;
+  gfxImageFormat mFormat;
+
+  AndroidGraphicBuffer* mFrontBuffer;
+  AndroidGraphicBuffer* mBackBuffer;
+
+  AndroidGraphicBuffer* mPendingReallocBuffer;
+  void ReallocPendingBuffer();
+};
+
+} /* mozilla */
+#endif /* AndroidDirectTexture_h_ */