Inventor/fields/SoMFImage.h

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/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/


#ifndef  _SO_MF_IMAGE_
#define  _SO_MF_IMAGE_

#include <Inventor/fields/SoSubField.h>
#include <Inventor/SbLinear.h>
#include <Inventor/SbPList.h>

//
//  SoMFImage subclass of SoMField.
//

class  SoMFImage : public SoMField {

  // Uses only some of the standard field stuff 
  // (because there is no SbImage type):
  SO_MFIELD_REQUIRED_HEADER(SoMFImage);
  SO__MFIELD_RW_HEADER(SoMFImage);
  SO_MFIELD_CONSTRUCTOR_HEADER(SoMFImage);
  
 public:
  enum CopyPolicy {
    COPY = 0,
    NO_COPY = 1,
    NO_COPY_AND_DELETE = 2,
    NO_COPY_AND_FREE = 3
  };

  // getValue returns the size, number of components and a constant
  // pointer to the image.

  const unsigned char *getValue(SbVec2s &size, int &nc) const;

  // setValue copies the image given to it into internal storage.
  // See startEditing() for a way of avoiding the copy if you are
  // doing a getValue() followed immediately by a setValue(). Set
  // 'copy' to NO_COPY or NO_COPY_AND_DELETE to pass directly the
  // pointer on the images. Otherwise, the buffer 'bytes' will be
  // copied. If copy is set to COPY or NO_COPY_AND_DELETE or
  // NO_COPY_AND_FREE, this object will delete the buffer when
  // required. If a NULL pointer is passed, a new bloc is allocated
  // according to the size and the number of components.

  void setValue(const SbVec2s &size, int nc,
                const unsigned char *bytes, 
                CopyPolicy copy = COPY);    
#ifdef NOTNOW

  void setSubValue(const SbVec2s &subSize, 
                   const SbVec2s &offset,
                   unsigned char *bytes);

  void setSubValues(const SbVec2s *subSizes, 
                    const SbVec2s *offsets,
                    int num, unsigned char **bytes);   
  int operator ==(const SoMFImage &f) const;

  int operator !=(const SoMFImage &f) const
  { return ! ((*this) == f); }

  unsigned char *startEditing(SbVec2s &size, int &nc);

  void finishEditing();

  unsigned char *getSubTexture(int index, SbVec2s &size, SbVec2s &offset);

  SbBool hasSubTextures(int &numSubTextures);
#endif

  void setNeverWrite(SbBool neverWrite);

  SbBool isNeverWrite() 
    { return neverWrite ; }

  SbBool hasTransparency() const;

 private:

  static void initClass();
 //
 void resetSubTextures();
  
 private:

  // Width and height of image
  SbVec2s size;

  // Number of components per pixel
  int numComponents;

  // Array of pixels
  unsigned char *bytes;

  CopyPolicy copyPolicy;

  // list of [subSize, offset, bytes]
 // SbPList subTexList;
  SbBool neverWrite;

  // -1 = don't know yet, 0 = no transp, 1 = has transp
  int m_hasTransparency;
  
  // Reading and writing
  virtual SbBool readValue(SoInput *in);
  virtual void writeValue(SoOutput *out) const;
};

#endif /* _SO_MF_IMAGE_ */

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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