The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/image/encoders/png/nsPNGEncoder.h	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,82 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; 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 +#include "mozilla/Attributes.h"
    1.10 +#include "mozilla/ReentrantMonitor.h"
    1.11 +
    1.12 +#include "imgIEncoder.h"
    1.13 +
    1.14 +#include "nsCOMPtr.h"
    1.15 +
    1.16 +#include <png.h>
    1.17 +
    1.18 +#define NS_PNGENCODER_CID \
    1.19 +{ /* 38d1592e-b81e-432b-86f8-471878bbfe07 */         \
    1.20 +     0x38d1592e,                                     \
    1.21 +     0xb81e,                                         \
    1.22 +     0x432b,                                         \
    1.23 +    {0x86, 0xf8, 0x47, 0x18, 0x78, 0xbb, 0xfe, 0x07} \
    1.24 +}
    1.25 +
    1.26 +// Provides PNG encoding functionality. Use InitFromData() to do the
    1.27 +// encoding. See that function definition for encoding options.
    1.28 +
    1.29 +class nsPNGEncoder MOZ_FINAL : public imgIEncoder
    1.30 +{
    1.31 +  typedef mozilla::ReentrantMonitor ReentrantMonitor;
    1.32 +public:
    1.33 +  NS_DECL_THREADSAFE_ISUPPORTS
    1.34 +  NS_DECL_IMGIENCODER
    1.35 +  NS_DECL_NSIINPUTSTREAM
    1.36 +  NS_DECL_NSIASYNCINPUTSTREAM
    1.37 +
    1.38 +  nsPNGEncoder();
    1.39 +  ~nsPNGEncoder();
    1.40 +
    1.41 +protected:
    1.42 +  nsresult ParseOptions(const nsAString& aOptions,
    1.43 +                        bool* useTransparency,
    1.44 +                        bool* skipFirstFrame,
    1.45 +                        uint32_t* numAnimatedFrames,
    1.46 +                        uint32_t* numIterations,
    1.47 +                        uint32_t* frameDispose,
    1.48 +                        uint32_t* frameBlend,
    1.49 +                        uint32_t* frameDelay,
    1.50 +                        uint32_t* offsetX,
    1.51 +                        uint32_t* offsetY);
    1.52 +  void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
    1.53 +                          uint32_t aPixelWidth, bool aUseTransparency);
    1.54 +  void StripAlpha(const uint8_t* aSrc, uint8_t* aDest,
    1.55 +                  uint32_t aPixelWidth);
    1.56 +  static void WarningCallback(png_structp png_ptr, png_const_charp warning_msg);
    1.57 +  static void ErrorCallback(png_structp png_ptr, png_const_charp error_msg);
    1.58 +  static void WriteCallback(png_structp png, png_bytep data, png_size_t size);
    1.59 +  void NotifyListener();
    1.60 +
    1.61 +  png_struct* mPNG;
    1.62 +  png_info* mPNGinfo;
    1.63 +
    1.64 +  bool mIsAnimation;
    1.65 +  bool mFinished;
    1.66 +
    1.67 +  // image buffer
    1.68 +  uint8_t* mImageBuffer;
    1.69 +  uint32_t mImageBufferSize;
    1.70 +  uint32_t mImageBufferUsed;
    1.71 +
    1.72 +  uint32_t mImageBufferReadPoint;
    1.73 +
    1.74 +  nsCOMPtr<nsIInputStreamCallback> mCallback;
    1.75 +  nsCOMPtr<nsIEventTarget> mCallbackTarget;
    1.76 +  uint32_t mNotifyThreshold;
    1.77 +
    1.78 +  /*
    1.79 +    nsPNGEncoder is designed to allow one thread to pump data into it while another
    1.80 +    reads from it.  We lock to ensure that the buffer remains append-only while
    1.81 +    we read from it (that it is not realloced) and to ensure that only one thread
    1.82 +    dispatches a callback for each call to AsyncWait.
    1.83 +   */
    1.84 +  ReentrantMonitor mReentrantMonitor;
    1.85 +};