michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsJPEGDecoder_h__
michael@0: #define nsJPEGDecoder_h__
michael@0: 
michael@0: #include "RasterImage.h"
michael@0: /* On Windows systems, RasterImage.h brings in 'windows.h', which defines INT32.
michael@0:  * But the jpeg decoder has its own definition of INT32. To avoid build issues,
michael@0:  * we need to undefine the version from 'windows.h'. */
michael@0: #undef INT32
michael@0: 
michael@0: #include "Decoder.h"
michael@0: 
michael@0: #include "nsAutoPtr.h"
michael@0: 
michael@0: #include "nsIInputStream.h"
michael@0: #include "nsIPipe.h"
michael@0: #include "qcms.h"
michael@0: 
michael@0: extern "C" {
michael@0: #include "jpeglib.h"
michael@0: }
michael@0: 
michael@0: #include <setjmp.h>
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace image {
michael@0: 
michael@0: typedef struct {
michael@0:     struct jpeg_error_mgr pub;  /* "public" fields for IJG library*/
michael@0:     jmp_buf setjmp_buffer;      /* For handling catastropic errors */
michael@0: } decoder_error_mgr;
michael@0: 
michael@0: typedef enum {
michael@0:     JPEG_HEADER,                          /* Reading JFIF headers */
michael@0:     JPEG_START_DECOMPRESS,
michael@0:     JPEG_DECOMPRESS_PROGRESSIVE,          /* Output progressive pixels */
michael@0:     JPEG_DECOMPRESS_SEQUENTIAL,           /* Output sequential pixels */
michael@0:     JPEG_DONE,
michael@0:     JPEG_SINK_NON_JPEG_TRAILER,          /* Some image files have a */
michael@0:                                          /* non-JPEG trailer */
michael@0:     JPEG_ERROR    
michael@0: } jstate;
michael@0: 
michael@0: class RasterImage;
michael@0: class Orientation;
michael@0: 
michael@0: class nsJPEGDecoder : public Decoder
michael@0: {
michael@0: public:
michael@0:   nsJPEGDecoder(RasterImage &aImage, Decoder::DecodeStyle aDecodeStyle);
michael@0:   virtual ~nsJPEGDecoder();
michael@0: 
michael@0:   virtual void InitInternal();
michael@0:   virtual void WriteInternal(const char* aBuffer, uint32_t aCount, DecodeStrategy aStrategy);
michael@0:   virtual void FinishInternal();
michael@0: 
michael@0:   virtual Telemetry::ID SpeedHistogram();
michael@0:   void NotifyDone();
michael@0: 
michael@0: protected:
michael@0:   Orientation ReadOrientationFromEXIF();
michael@0:   void OutputScanlines(bool* suspend);
michael@0: 
michael@0: public:
michael@0:   struct jpeg_decompress_struct mInfo;
michael@0:   struct jpeg_source_mgr mSourceMgr;
michael@0:   decoder_error_mgr mErr;
michael@0:   jstate mState;
michael@0: 
michael@0:   uint32_t mBytesToSkip;
michael@0: 
michael@0:   const JOCTET *mSegment;   // The current segment we are decoding from
michael@0:   uint32_t mSegmentLen;     // amount of data in mSegment
michael@0: 
michael@0:   JOCTET *mBackBuffer;
michael@0:   uint32_t mBackBufferLen; // Offset of end of active backtrack data
michael@0:   uint32_t mBackBufferSize; // size in bytes what mBackBuffer was created with
michael@0:   uint32_t mBackBufferUnreadLen; // amount of data currently in mBackBuffer
michael@0: 
michael@0:   JOCTET  *mProfile;
michael@0:   uint32_t mProfileLength;
michael@0: 
michael@0:   qcms_profile *mInProfile;
michael@0:   qcms_transform *mTransform;
michael@0: 
michael@0:   bool mReading;
michael@0: 
michael@0:   const Decoder::DecodeStyle mDecodeStyle;
michael@0: 
michael@0:   uint32_t mCMSMode;
michael@0: };
michael@0: 
michael@0: } // namespace image
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // nsJPEGDecoder_h__