michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef AndroidDirectTexture_h_
michael@0: #define AndroidDirectTexture_h_
michael@0: 
michael@0: #include "gfxTypes.h"
michael@0: #include "mozilla/Mutex.h"
michael@0: #include "AndroidGraphicBuffer.h"
michael@0: 
michael@0: struct nsIntRect;
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: /**
michael@0:  * This is a thread safe wrapper around AndroidGraphicBuffer that handles
michael@0:  * double buffering. Each call to Bind() flips the buffer when necessary.
michael@0:  *
michael@0:  * You need to be careful when destroying an instance of this class. If either
michael@0:  * buffer is locked by the application of the driver/hardware, bad things will
michael@0:  * happen. Be sure that the OpenGL texture is no longer on the screen.
michael@0:  */
michael@0: class AndroidDirectTexture
michael@0: {
michael@0: public:
michael@0:   AndroidDirectTexture(uint32_t width, uint32_t height, uint32_t usage, gfxImageFormat format);
michael@0:   virtual ~AndroidDirectTexture();
michael@0: 
michael@0:   bool Lock(uint32_t usage, unsigned char **bits);
michael@0:   bool Lock(uint32_t usage, const nsIntRect& rect, unsigned char **bits);
michael@0:   bool Unlock(bool aFlip = true);
michael@0: 
michael@0:   bool Reallocate(uint32_t aWidth, uint32_t aHeight);
michael@0:   bool Reallocate(uint32_t aWidth, uint32_t aHeight, gfxImageFormat aFormat);
michael@0: 
michael@0:   uint32_t Width() { return mWidth; }
michael@0:   uint32_t Height() { return mHeight; }
michael@0: 
michael@0:   bool Bind();
michael@0: 
michael@0: private:
michael@0:   mozilla::Mutex mLock;
michael@0:   bool mNeedFlip;
michael@0: 
michael@0:   uint32_t mWidth;
michael@0:   uint32_t mHeight;
michael@0:   gfxImageFormat mFormat;
michael@0: 
michael@0:   AndroidGraphicBuffer* mFrontBuffer;
michael@0:   AndroidGraphicBuffer* mBackBuffer;
michael@0: 
michael@0:   AndroidGraphicBuffer* mPendingReallocBuffer;
michael@0:   void ReallocPendingBuffer();
michael@0: };
michael@0: 
michael@0: } /* mozilla */
michael@0: #endif /* AndroidDirectTexture_h_ */