The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/image/encoders/jpeg/nsJPEGEncoder.h	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,79 @@
     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 "imgIEncoder.h"
    1.10 +
    1.11 +#include "mozilla/ReentrantMonitor.h"
    1.12 +#include "mozilla/Attributes.h"
    1.13 +
    1.14 +#include "nsCOMPtr.h"
    1.15 +
    1.16 +// needed for JPEG library
    1.17 +#include <stdio.h>
    1.18 +
    1.19 +extern "C" {
    1.20 +#include "jpeglib.h"
    1.21 +}
    1.22 +
    1.23 +#define NS_JPEGENCODER_CID \
    1.24 +{ /* ac2bb8fe-eeeb-4572-b40f-be03932b56e0 */         \
    1.25 +     0xac2bb8fe,                                     \
    1.26 +     0xeeeb,                                         \
    1.27 +     0x4572,                                         \
    1.28 +    {0xb4, 0x0f, 0xbe, 0x03, 0x93, 0x2b, 0x56, 0xe0} \
    1.29 +}
    1.30 +
    1.31 +// Provides JPEG encoding functionality. Use InitFromData() to do the
    1.32 +// encoding. See that function definition for encoding options.
    1.33 +
    1.34 +class nsJPEGEncoder MOZ_FINAL : public imgIEncoder
    1.35 +{
    1.36 +  typedef mozilla::ReentrantMonitor ReentrantMonitor;
    1.37 +public:
    1.38 +  NS_DECL_THREADSAFE_ISUPPORTS
    1.39 +  NS_DECL_IMGIENCODER
    1.40 +  NS_DECL_NSIINPUTSTREAM
    1.41 +  NS_DECL_NSIASYNCINPUTSTREAM
    1.42 +
    1.43 +  nsJPEGEncoder();
    1.44 +
    1.45 +private:
    1.46 +  ~nsJPEGEncoder();
    1.47 +
    1.48 +protected:
    1.49 +
    1.50 +  void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
    1.51 +                          uint32_t aPixelWidth);
    1.52 +  void ConvertRGBARow(const uint8_t* aSrc, uint8_t* aDest, uint32_t aPixelWidth);
    1.53 +
    1.54 +  static void initDestination(jpeg_compress_struct* cinfo);
    1.55 +  static boolean emptyOutputBuffer(jpeg_compress_struct* cinfo);
    1.56 +  static void termDestination(jpeg_compress_struct* cinfo);
    1.57 +
    1.58 +  static void errorExit(jpeg_common_struct* cinfo);
    1.59 +
    1.60 +  void NotifyListener();
    1.61 +
    1.62 +  bool mFinished;
    1.63 +
    1.64 +  // image buffer
    1.65 +  uint8_t* mImageBuffer;
    1.66 +  uint32_t mImageBufferSize;
    1.67 +  uint32_t mImageBufferUsed;
    1.68 +
    1.69 +  uint32_t mImageBufferReadPoint;
    1.70 +
    1.71 +  nsCOMPtr<nsIInputStreamCallback> mCallback;
    1.72 +  nsCOMPtr<nsIEventTarget> mCallbackTarget;
    1.73 +  uint32_t mNotifyThreshold;
    1.74 +
    1.75 +  /*
    1.76 +    nsJPEGEncoder is designed to allow one thread to pump data into it while another
    1.77 +    reads from it.  We lock to ensure that the buffer remains append-only while
    1.78 +    we read from it (that it is not realloced) and to ensure that only one thread
    1.79 +    dispatches a callback for each call to AsyncWait.
    1.80 +   */
    1.81 +  ReentrantMonitor mReentrantMonitor;
    1.82 +};