SoJPEGImageRW.h

/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
 ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
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 ***  CLAUSE  AT FAR 52.227-19  OR SUBPARAGRAPH  (C)(1)(II)  OF  THE RIGHTS IN      ***
 ***  TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013.             ***
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 ***                   COPYRIGHT (C) 1996-2022 BY FEI S.A.S,                        ***
 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Author      : C. OGNIER (Jun 2003)
**=======================================================================*/
 
 
#ifndef _SOJPEGIMAGERW_
#define _SOJPEGIMAGERW_
 
#include <Inventor/image/SoRasterImageRW.h>
#include <Inventor/threads/SbThreadMutex.h>
 
struct jpeg_compress_struct;
 
class  SoJPEGImageRW : public SoRasterImageRW {
 
  SO_IMAGE_RASTER_RW_HEADER()
 
public:
 
  SoJPEGImageRW();
 
  virtual ~SoJPEGImageRW();
 
  virtual SbBool open(SoRasterImageIO* rasterImageIO, OpenMode openMode);
 
  virtual void close();
 
  virtual SbBool write(SbRasterImage* rasterImage, unsigned int xPos = 0, unsigned int yPos = 0);
 
  virtual SbBool writeFooter();
 
  virtual SbBool read(SbRasterImage* rasterImage, SbBool infoOnly = FALSE);
 
  virtual SbBool isMultipleBufferInverted() const;
 
  virtual SoRasterImageRW::WriteCapability getWriteCapability() const;
 
  virtual SoRasterImageRW::ReadCapability getReadCapability() const;
 
  void  setOutputQuality(float quality);
 
  float getOutputQuality() const;
 
private:
  unsigned char* getBuffer(size_t& size) const;
 
  virtual bool supportsAlpha() const;
 
private:
  virtual void createSuffixList();
 
 
private:
  static SbThreadMutex s_mutex;
 
  struct jpeg_compress_struct* m_cinfoW;
  float  m_quality;
  SbBool m_writeToBuffer;
  size_t m_jpegBufferSize;
  unsigned char* m_jpegBuffer;
  bool m_isJpegLibraryLoaded;
};
 
#endif