gecko/widget/android/AndroidGraphicBuffer.h
2012-05-21 12:12:37 +01:00

73 lines
2.0 KiB
C++

/* -*- 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 AndroidGraphicBuffer_h_
#define AndroidGraphicBuffer_h_
#include "gfxASurface.h"
#include "nsRect.h"
typedef void* EGLImageKHR;
typedef void* EGLClientBuffer;
namespace mozilla {
/**
* This class allows access to Android's direct texturing mechanism. Locking
* the buffer gives you a pointer you can read/write to directly. It is fully
* threadsafe, but you probably really want to use the AndroidDirectTexture
* class which will handle double buffering.
*
* In order to use the buffer in OpenGL, just call Bind() and it will attach
* to whatever texture is bound to GL_TEXTURE_2D.
*/
class AndroidGraphicBuffer
{
public:
enum {
UsageSoftwareRead = 1,
UsageSoftwareWrite = 1 << 1,
UsageTexture = 1 << 2,
UsageTarget = 1 << 3,
Usage2D = 1 << 4
};
AndroidGraphicBuffer(PRUint32 width, PRUint32 height, PRUint32 usage, gfxASurface::gfxImageFormat format);
virtual ~AndroidGraphicBuffer();
int Lock(PRUint32 usage, unsigned char **bits);
int Lock(PRUint32 usage, const nsIntRect& rect, unsigned char **bits);
int Unlock();
bool Reallocate(PRUint32 aWidth, PRUint32 aHeight, gfxASurface::gfxImageFormat aFormat);
PRUint32 Width() { return mWidth; }
PRUint32 Height() { return mHeight; }
bool Bind();
static bool IsBlacklisted();
private:
PRUint32 mWidth;
PRUint32 mHeight;
PRUint32 mUsage;
gfxASurface::gfxImageFormat mFormat;
bool EnsureInitialized();
bool EnsureEGLImage();
void DestroyBuffer();
bool EnsureBufferCreated();
PRUint32 GetAndroidUsage(PRUint32 aUsage);
PRUint32 GetAndroidFormat(gfxASurface::gfxImageFormat aFormat);
void *mHandle;
void *mEGLImage;
};
} /* mozilla */
#endif /* AndroidGraphicBuffer_h_ */