The Tor Browser: widget/android/AndroidDirectTexture.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef AndroidDirectTexture_h_

     7 #define AndroidDirectTexture_h_

     9 #include "gfxTypes.h"

    10 #include "mozilla/Mutex.h"

    11 #include "AndroidGraphicBuffer.h"

    13 struct nsIntRect;

    15 namespace mozilla {

    17 /**

    18  * This is a thread safe wrapper around AndroidGraphicBuffer that handles

    19  * double buffering. Each call to Bind() flips the buffer when necessary.

    20  *

    21  * You need to be careful when destroying an instance of this class. If either

    22  * buffer is locked by the application of the driver/hardware, bad things will

    23  * happen. Be sure that the OpenGL texture is no longer on the screen.

    24  */

    25 class AndroidDirectTexture

    26 {

    27 public:

    28   AndroidDirectTexture(uint32_t width, uint32_t height, uint32_t usage, gfxImageFormat format);

    29   virtual ~AndroidDirectTexture();

    31   bool Lock(uint32_t usage, unsigned char **bits);

    32   bool Lock(uint32_t usage, const nsIntRect& rect, unsigned char **bits);

    33   bool Unlock(bool aFlip = true);

    35   bool Reallocate(uint32_t aWidth, uint32_t aHeight);

    36   bool Reallocate(uint32_t aWidth, uint32_t aHeight, gfxImageFormat aFormat);

    38   uint32_t Width() { return mWidth; }

    39   uint32_t Height() { return mHeight; }

    41   bool Bind();

    43 private:

    44   mozilla::Mutex mLock;

    45   bool mNeedFlip;

    47   uint32_t mWidth;

    48   uint32_t mHeight;

    49   gfxImageFormat mFormat;

    51   AndroidGraphicBuffer* mFrontBuffer;

    52   AndroidGraphicBuffer* mBackBuffer;

    54   AndroidGraphicBuffer* mPendingReallocBuffer;

    55   void ReallocPendingBuffer();

    56 };

    58 } /* mozilla */

    59 #endif /* AndroidDirectTexture_h_ */

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