Inventor/fields/SoSFImage3.h

Go to the documentation of this file.

/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
 ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
 ***                                                                                ***
 ***  REPRODUCTION, DISCLOSURE,  OR USE,  IN WHOLE OR IN PART,  OTHER THAN AS       ***
 ***  SPECIFIED  IN THE LICENSE ARE  NOT TO BE  UNDERTAKEN  EXCEPT WITH PRIOR       ***
 ***  WRITTEN AUTHORIZATION OF FEI S.A.S.                                           ***
 ***                                                                                ***
 ***                        RESTRICTED RIGHTS LEGEND                                ***
 ***  USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS      ***
 ***  WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN      ***
 ***  SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT      ***
 ***  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.             ***
 ***                                                                                ***
 ***                   COPYRIGHT (C) 1996-2020 BY FEI S.A.S,                        ***
 ***                        BORDEAUX, FRANCE                                        ***
 ***                      ALL RIGHTS RESERVED                                       ***
**=======================================================================*/
/*=======================================================================
** Author      : Patrick Vigneras (Nov 1999)
**=======================================================================*/

#ifndef  _SO_SF_IMAGE_3_
#define  _SO_SF_IMAGE_3_

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

class SoCpuBufferObject;

//
//  SoSFImage3 subclass of SoSField. This field handles 3 dimensional images,
// that is a set of same-type (number of components) and same-size images.
// It is basically useful for 3d texturing (see Inventor/nodes/SoTexture3.h).
// This field uses a lot of memory (a simple 256x256x256 image in
// grayscale already takes 16MB of memory). Therefore, as opposed to the
// other fields, this field provides a way to manage memory and avoid
// useless copies of data. This is essentially done through the CopyPolicy
// enumeration and the set/isNeverWrite methods. The CopyPolicy provides
// four types of memory management:
// COPY is the default and is consistent with all other fields: any buffer
// passed is copied and the memory management is done inside the field;
// NO_COPY only uses a pointer given by the application which remains
// responsible for the memory management;
// NO_COPY_AND_DELETE accepts pointers from the application (ie does not
// copy the buffer) but the field takes responsability for the memory
// management. Note that this case is only intended for buffers
// created with the operator 'new';
// NO_COPY_AND_FREE is essentially the same as above but applies the function
// 'free' on the pointer instead of the operator 'delete'.
// Furthermore, two methods, is/setNeverWrite allow to write or not write
// out the data stored in this field. By default, the 'never write' condition
// is TRUE.
//

class  SoSFImage3 : public SoSField {

  // Uses only some of the standard field stuff (because there is no
  // SbImage type):
  SO_SFIELD_REQUIRED_HEADER(SoSFImage3);
  SO_SFIELD_CONSTRUCTOR_HEADER(SoSFImage3);
  
public:

  enum CopyPolicy {
    COPY = 0,
      NO_COPY = 1,
    NO_COPY_AND_DELETE = 2,
    NO_COPY_AND_FREE = 3
  };

  const unsigned char *getValue(SbVec3s &size, int &nc) const;

  SoBufferObject *getBufferObject(SbVec3s &size, int &nc) const;

  void setValue(const SbVec3s &size, 
                int nc,
                unsigned char *bytes, 
                CopyPolicy copy = COPY);


  void setValue(const SbVec3s &size, 
                int nc,
                SoBufferObject* bufferObject, 
                CopyPolicy copy = COPY);

  void setSubValue(const SbVec3s &subSize, 
                   const SbVec3s &offset,
                   unsigned char *bytes, 
                   CopyPolicy copy = COPY);
  void setSubValues(const SbVec3s *subSizes, 
                    const SbVec3s *offsets,
                    int num, 
                    unsigned char **bytes, 
                    CopyPolicy copy = COPY);

  int operator==(const SoSFImage3 &f) const;
  int operator!=(const SoSFImage3 &f) const
  { return ! ((*this) == f); }

  unsigned char *startEditing(SbVec3s &size, int &nc);

  void finishEditing();

  unsigned char *getSubTexture(int index, SbVec3s &size, SbVec3s &offset);

  SbBool hasSubTextures(int &numSubTextures);

  void setNeverWrite(SbBool neverWrite);
  SbBool isNeverWrite()
  { return m_neverWrite; }


  SoBufferObject* getBufferObject() const;

 private:

  static void initClass();
  static void exitClass();
  void resetSubTextures();

  void deleteBytesArray();
  
  int getNumComponents() const;

private:

  // Width, height and depth of image
  SbVec3s m_size;

  // Number of components per pixel
  int m_numComponents;

  unsigned char* m_buffer;

  // Buffer object which contains the data.
  SoRef<SoBufferObject> m_bufferObject;

  SoRef<SoCpuBufferObject> m_cpuBufferObject;

  CopyPolicy m_copyPolicy;

  // list of [subSize,offset,bytes,copypolicy]
  SbPList m_subTextures;

  SbBool m_neverWrite;
  
  // Reading and writing
  virtual SbBool readValue(SoInput *in);
  virtual void writeValue(SoOutput *out) const;
};

inline SoBufferObject* 
SoSFImage3::getBufferObject() const
{
  return m_bufferObject.ptr();
}

inline int 
SoSFImage3::getNumComponents() const
{
  return m_numComponents;
}

#endif /* _SO_SF_IMAGE_3_ */

---

Open Inventor Toolkit reference manual, generated on 12 Feb 2024
Copyright © Thermo Fisher Scientific All rights reserved. http://www.openinventor.com/