зеркало из https://github.com/mozilla/gecko-dev.git
73 строки
2.0 KiB
C++
73 строки
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef AndroidGraphicBuffer_h_
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#define AndroidGraphicBuffer_h_
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#include "gfxASurface.h"
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#include "nsRect.h"
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typedef void* EGLImageKHR;
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typedef void* EGLClientBuffer;
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namespace mozilla {
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/**
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* This class allows access to Android's direct texturing mechanism. Locking
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* the buffer gives you a pointer you can read/write to directly. It is fully
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* threadsafe, but you probably really want to use the AndroidDirectTexture
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* class which will handle double buffering.
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*
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* In order to use the buffer in OpenGL, just call Bind() and it will attach
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* to whatever texture is bound to GL_TEXTURE_2D.
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*/
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class AndroidGraphicBuffer
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{
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public:
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enum {
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UsageSoftwareRead = 1,
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UsageSoftwareWrite = 1 << 1,
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UsageTexture = 1 << 2,
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UsageTarget = 1 << 3,
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Usage2D = 1 << 4
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};
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AndroidGraphicBuffer(PRUint32 width, PRUint32 height, PRUint32 usage, gfxASurface::gfxImageFormat format);
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virtual ~AndroidGraphicBuffer();
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int Lock(PRUint32 usage, unsigned char **bits);
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int Lock(PRUint32 usage, const nsIntRect& rect, unsigned char **bits);
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int Unlock();
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bool Reallocate(PRUint32 aWidth, PRUint32 aHeight, gfxASurface::gfxImageFormat aFormat);
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PRUint32 Width() { return mWidth; }
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PRUint32 Height() { return mHeight; }
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bool Bind();
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static bool IsBlacklisted();
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private:
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PRUint32 mWidth;
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PRUint32 mHeight;
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PRUint32 mUsage;
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gfxASurface::gfxImageFormat mFormat;
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bool EnsureInitialized();
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bool EnsureEGLImage();
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void DestroyBuffer();
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bool EnsureBufferCreated();
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PRUint32 GetAndroidUsage(PRUint32 aUsage);
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PRUint32 GetAndroidFormat(gfxASurface::gfxImageFormat aFormat);
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void *mHandle;
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void *mEGLImage;
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};
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} /* mozilla */
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#endif /* AndroidGraphicBuffer_h_ */
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