VertexDeclaration.hh

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#ifndef ACG_VERTEXDECLARATION_HH
#define ACG_VERTEXDECLARATION_HH
 
#include <vector>
#include <list>
#include <map>
#include <QString>
#include <ACG/Config/ACGDefines.hh>
 
namespace GLSL
{
  class Program;
}
 
namespace ACG
{
 
enum VERTEX_USAGE
{                               
  VERTEX_USAGE_POSITION = 0,    
  VERTEX_USAGE_NORMAL,          
  VERTEX_USAGE_TEXCOORD,        
  VERTEX_USAGE_COLOR,           
  VERTEX_USAGE_BLENDWEIGHTS,    
  VERTEX_USAGE_BLENDINDICES,    
  VERTEX_USAGE_SHADER_INPUT,    
  VERTEX_USAGE_FORCE_DWORD = 0xFFFFFFFF
};
 
struct ACGDLLEXPORT VertexElement
{
  VertexElement();
 
  unsigned int type_;           
  unsigned int numElements_;    
  VERTEX_USAGE usage_;          
  const char* shaderInputName_; 
  const void* pointer_;         
  unsigned int divisor_;        
  unsigned int vbo_;            
 
  void setByteOffset(unsigned int _offset);
 
  unsigned int getByteOffset() const;
 
  bool operator == (const VertexElement& _other) const;
 
  bool operator != (const VertexElement& _other) const {return !(*this == _other);}
};
 
class ACGDLLEXPORT VertexDeclaration
{
public:
 
  VertexDeclaration();
  ~VertexDeclaration();
 
  void addElement(const VertexElement* _pElement);
 
  void addElement(unsigned int _type, unsigned int _numElements, VERTEX_USAGE _usage, const void* _pointer, const char* _shaderInputName = 0, unsigned int _divisor = 0, unsigned int _vbo = 0);
  
  void addElement(unsigned int _type, unsigned int _numElements, VERTEX_USAGE _usage, size_t _byteOffset = 0, const char* _shaderInputName = 0, unsigned int _divisor = 0, unsigned int _vbo = 0);
 
  void addElements(unsigned int _numElements, const VertexElement* _pElements);
 
  void clear();
 
  void activateFixedFunction() const;
 
  void deactivateFixedFunction() const;
 
 
  void activateShaderPipeline(GLSL::Program* _prog) const;
 
 
  void deactivateShaderPipeline(GLSL::Program* _prog) const;
 
 
  void setVertexStride(unsigned int _stride);
 
  unsigned int getVertexStride(unsigned int i = 0) const;
 
  unsigned int getNumElements() const;
 
  const VertexElement* getElement(unsigned int i) const;
 
  int findElementIdByUsage(VERTEX_USAGE _usage) const;
 
  const VertexElement* findElementByUsage(VERTEX_USAGE _usage) const;
 
  static size_t getGLTypeSize(unsigned int _type);
 
  static size_t getElementSize(const VertexElement* _pElement);
 
  static bool supportsInstancedArrays();
 
  QString toString() const;
 
 
  bool operator ==(const VertexDeclaration& _other) const;
 
  bool operator !=(const VertexDeclaration& _other) const {return !(*this == _other);}
 
private:
 
  void updateOffsets();
 
  void updateShaderInputName(VertexElement* _pElem);
 
 
  std::vector<VertexElement> elements_;
 
  unsigned int vertexStride_;
 
  std::map<unsigned int, unsigned int> vertexStridesVBO_;
 
  int strideUserDefined_;
};
 
 
//=============================================================================
} // namespace ACG
//=============================================================================
 
 
 
#endif // ACG_VERTEXDECLARATION_HH defined