1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/android/AndroidGraphicBuffer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,73 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef AndroidGraphicBuffer_h_
1.10 +#define AndroidGraphicBuffer_h_
1.11 +
1.12 +#include "gfxTypes.h"
1.13 +
1.14 +typedef void* EGLImageKHR;
1.15 +typedef void* EGLClientBuffer;
1.16 +
1.17 +struct nsIntRect;
1.18 +
1.19 +namespace mozilla {
1.20 +
1.21 +/**
1.22 + * This class allows access to Android's direct texturing mechanism. Locking
1.23 + * the buffer gives you a pointer you can read/write to directly. It is fully
1.24 + * threadsafe, but you probably really want to use the AndroidDirectTexture
1.25 + * class which will handle double buffering.
1.26 + *
1.27 + * In order to use the buffer in OpenGL, just call Bind() and it will attach
1.28 + * to whatever texture is bound to GL_TEXTURE_2D.
1.29 + */
1.30 +class AndroidGraphicBuffer
1.31 +{
1.32 +public:
1.33 + enum {
1.34 + UsageSoftwareRead = 1,
1.35 + UsageSoftwareWrite = 1 << 1,
1.36 + UsageTexture = 1 << 2,
1.37 + UsageTarget = 1 << 3,
1.38 + Usage2D = 1 << 4
1.39 + };
1.40 +
1.41 + AndroidGraphicBuffer(uint32_t width, uint32_t height, uint32_t usage, gfxImageFormat format);
1.42 + virtual ~AndroidGraphicBuffer();
1.43 +
1.44 + int Lock(uint32_t usage, unsigned char **bits);
1.45 + int Lock(uint32_t usage, const nsIntRect& rect, unsigned char **bits);
1.46 + int Unlock();
1.47 + bool Reallocate(uint32_t aWidth, uint32_t aHeight, gfxImageFormat aFormat);
1.48 +
1.49 + uint32_t Width() { return mWidth; }
1.50 + uint32_t Height() { return mHeight; }
1.51 +
1.52 + bool Bind();
1.53 +
1.54 + static bool IsBlacklisted();
1.55 +
1.56 +private:
1.57 + uint32_t mWidth;
1.58 + uint32_t mHeight;
1.59 + uint32_t mUsage;
1.60 + gfxImageFormat mFormat;
1.61 +
1.62 + bool EnsureInitialized();
1.63 + bool EnsureEGLImage();
1.64 +
1.65 + void DestroyBuffer();
1.66 + bool EnsureBufferCreated();
1.67 +
1.68 + uint32_t GetAndroidUsage(uint32_t aUsage);
1.69 + uint32_t GetAndroidFormat(gfxImageFormat aFormat);
1.70 +
1.71 + void *mHandle;
1.72 + void *mEGLImage;
1.73 +};
1.74 +
1.75 +} /* mozilla */
1.76 +#endif /* AndroidGraphicBuffer_h_ */
