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 AndroidGraphicBuffer_h_
michael@0: #define AndroidGraphicBuffer_h_
michael@0: 
michael@0: #include "gfxTypes.h"
michael@0: 
michael@0: typedef void* EGLImageKHR;
michael@0: typedef void* EGLClientBuffer;
michael@0: 
michael@0: struct nsIntRect;
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: /**
michael@0:  * This class allows access to Android's direct texturing mechanism. Locking
michael@0:  * the buffer gives you a pointer you can read/write to directly. It is fully
michael@0:  * threadsafe, but you probably really want to use the AndroidDirectTexture
michael@0:  * class which will handle double buffering.
michael@0:  *
michael@0:  * In order to use the buffer in OpenGL, just call Bind() and it will attach
michael@0:  * to whatever texture is bound to GL_TEXTURE_2D.
michael@0:  */
michael@0: class AndroidGraphicBuffer
michael@0: {
michael@0: public:
michael@0:   enum {
michael@0:     UsageSoftwareRead = 1,
michael@0:     UsageSoftwareWrite = 1 << 1,
michael@0:     UsageTexture = 1 << 2,
michael@0:     UsageTarget = 1 << 3,
michael@0:     Usage2D = 1 << 4
michael@0:   };
michael@0: 
michael@0:   AndroidGraphicBuffer(uint32_t width, uint32_t height, uint32_t usage, gfxImageFormat format);
michael@0:   virtual ~AndroidGraphicBuffer();
michael@0: 
michael@0:   int Lock(uint32_t usage, unsigned char **bits);
michael@0:   int Lock(uint32_t usage, const nsIntRect& rect, unsigned char **bits);
michael@0:   int Unlock();
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:   static bool IsBlacklisted();
michael@0: 
michael@0: private:
michael@0:   uint32_t mWidth;
michael@0:   uint32_t mHeight;
michael@0:   uint32_t mUsage;
michael@0:   gfxImageFormat mFormat;
michael@0: 
michael@0:   bool EnsureInitialized();
michael@0:   bool EnsureEGLImage();
michael@0: 
michael@0:   void DestroyBuffer();
michael@0:   bool EnsureBufferCreated();
michael@0: 
michael@0:   uint32_t GetAndroidUsage(uint32_t aUsage);
michael@0:   uint32_t GetAndroidFormat(gfxImageFormat aFormat);
michael@0: 
michael@0:   void *mHandle;
michael@0:   void *mEGLImage;
michael@0: };
michael@0: 
michael@0: } /* mozilla */
michael@0: #endif /* AndroidGraphicBuffer_h_ */