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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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widget/android/AndroidGraphicBuffer.h Normal file
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/* -*- 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 "gfxTypes.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(uint32_t width, uint32_t height, uint32_t usage, gfxImageFormat format);
virtual ~AndroidGraphicBuffer();
int Lock(uint32_t usage, unsigned char **bits);
int Lock(uint32_t usage, const nsIntRect& rect, unsigned char **bits);
int Unlock();
bool Reallocate(uint32_t aWidth, uint32_t aHeight, gfxImageFormat aFormat);
uint32_t Width() { return mWidth; }
uint32_t Height() { return mHeight; }
bool Bind();
static bool IsBlacklisted();
private:
uint32_t mWidth;
uint32_t mHeight;
uint32_t mUsage;
gfxImageFormat mFormat;
bool EnsureInitialized();
bool EnsureEGLImage();
void DestroyBuffer();
bool EnsureBufferCreated();
uint32_t GetAndroidUsage(uint32_t aUsage);
uint32_t GetAndroidFormat(gfxImageFormat aFormat);
void *mHandle;
void *mEGLImage;
};
} /* mozilla */
#endif /* AndroidGraphicBuffer_h_ */