Inventor/devices/SoGLBufferObject.h

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/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/
#if !defined SOGLBUFFEROBJECT_H
#define SOGLBUFFEROBJECT_H

#include <Inventor/devices/SoInteropBufferObject.h>
#include <Inventor/sys/SoGLType.h>

SO_PIMPL_PUBLIC_DECLARATION(SoGLBufferObject)
class SbVec2i32;

class  SoGLBufferObject : public SoInteropBufferObject
{
  SO_TYPED_CLASS_HEADER();
  SO_PIMPL_PUBLIC_HEADER(SoGLBufferObject)

public:

  enum BufferObjectTarget
  {
    PIXEL_PACK_BUFFER,

    PIXEL_UNPACK_BUFFER,

    ARRAY_BUFFER,

    ELEMENT_ARRAY_BUFFER,

    SHADER_STORAGE_BUFFER
  };

  enum Usage
  {
    STREAM_DRAW,

    STREAM_READ,

    STREAM_COPY,

    STATIC_DRAW,

    STATIC_READ,

    STATIC_COPY,

    DYNAMIC_DRAW,

    DYNAMIC_READ,

    DYNAMIC_COPY
  };

  SoGLBufferObject( Usage usage );

  static bool isAvailable();

  void setTarget( BufferObjectTarget target );

  BufferObjectTarget getTarget() const;

  virtual bool setSize( size_t size );

  virtual void map( SoBufferObject* targetBufferObject, AccessMode accessMode, size_t startPosition = 0, size_t mappingSize = SO_BUFFER_SIZE_ALL );

  virtual void unmap( SoBufferObject* bufferObject );

  void bind();

  void unbind();

  virtual void* map( AccessMode accessMode, size_t offset = 0, size_t count = SO_BUFFER_SIZE_ALL );

  virtual void unmap();

  bool isValid();

  GLuint getId() const;

  virtual SoBufferObject* createInstance() const;

  virtual void clearInstance();

  void memcpy(SoBufferObject* source, size_t destOffset = 0, size_t sourceOffset = 0, size_t copySize = SO_BUFFER_SIZE_ALL);
 
private:

  void copyToCpuBuffer( SoCpuBufferObject* targetBufferObject, size_t destOffset = 0, size_t sourceOffset = 0, size_t copySize = SO_BUFFER_SIZE_ALL );

  bool isBindable();

  void copyFromGLTexture(GLuint tex, const SbVec2i32& size, bool alpha);

  struct Configuration
  {
    size_t size;
    BufferObjectTarget target;
    Usage usage;
  };
  
private:
  virtual ~SoGLBufferObject();

  SoGLBufferObject();

  bool checkContext();

};

#endif // SOGLBUFFEROBJECT_H

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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