GLDrawContext Class Reference

OpenGL specialized DrawContext class. More...

#include <glDrawContext.h>

Inheritance diagram for GLDrawContext:

Public Types
typedef GLuint	VertexBufferBinding
Public Types inherited from DrawContext
typedef std::vector< PatchArray >	PatchArrayVector
typedef std::vector< float >	FVarData

Public Member Functions
virtual	~GLDrawContext ()
template<class VERTEX_BUFFER >
void	UpdateVertexTexture (VERTEX_BUFFER *vbo)
GLuint	GetPatchIndexBuffer () const
	Returns the GL texture buffer containing the patch control vertices array. More...
GLuint	GetPatchParamTextureBuffer () const
GLuint	GetVertexTextureBuffer () const
	Returns the GL texture buffer containing the vertex data. More...
GLuint	GetVertexValenceTextureBuffer () const
GLuint	GetQuadOffsetsTextureBuffer () const
GLuint	GetFvarDataTextureBuffer () const
	Returns the GL texture buffer containing fvar data. More...
bool	SetFVarDataTexture (Far::PatchTables const &patchTables, int fvarWidth, FVarData const &fvarData)
Public Member Functions inherited from DrawContext
	DrawContext ()
	Constructor. More...
virtual	~DrawContext ()
	Descrtuctor. More...
bool	IsAdaptive () const
PatchArrayVector const &	GetPatchArrays () const

Static Public Member Functions
static GLDrawContext *	Create (Far::PatchTables const *patchTables, int numVertexElements)
	Create an GLDraContext from Far::PatchTables. More...
static bool	SupportsAdaptiveTessellation ()
	true if the GL version detected supports shader tessellation More...
Static Public Member Functions inherited from DrawContext
static void	ConvertPatchArrays (Far::PatchTables::PatchArrayVector const &farPatchArrays, DrawContext::PatchArrayVector &osdPatchArrays, int maxValence, int numElements)

Protected Member Functions
	GLDrawContext ()
bool	create (Far::PatchTables const &patchTables, int numElements)
void	updateVertexTexture (GLuint vbo)

Protected Attributes
GLuint	_patchIndexBuffer
GLuint	_patchParamTextureBuffer
GLuint	_fvarDataTextureBuffer
GLuint	_vertexTextureBuffer
GLuint	_vertexValenceTextureBuffer
GLuint	_quadOffsetsTextureBuffer
Protected Attributes inherited from DrawContext
PatchArrayVector	_patchArrays
bool	_isAdaptive

Additional Inherited Members
Static Protected Member Functions inherited from DrawContext
static void	packFVarData (Far::PatchTables const &patchTables, int fvarWidth, FVarData const &src, FVarData &dst)

Detailed Description

OpenGL specialized DrawContext class.

GLDrawContext implements the OSD drawing interface with the OpenGL API. Some functionality may be disabled depending on compile and run-time driver support.

Contexts interface the serialized topological data pertaining to the geometric primitives with the capabilities of the selected discrete compute device.

Definition at line 54 of file glDrawContext.h.

Member Typedef Documentation

typedef GLuint VertexBufferBinding

Definition at line 56 of file glDrawContext.h.

Constructor & Destructor Documentation

virtual ~GLDrawContext ( )

virtual

GLDrawContext ( )

protected

Member Function Documentation

static GLDrawContext* Create ( Far::PatchTables const *  patchTables, int  numVertexElements  )

static

Create an GLDraContext from Far::PatchTables.

Parameters

patchTables	a valid set of Far::PatchTables
numVertexElements	the number of vertex elements

bool create ( Far::PatchTables const &  patchTables, int  numElements  )

protected

GLuint GetFvarDataTextureBuffer ( ) const

inline

Returns the GL texture buffer containing fvar data.

Definition at line 110 of file glDrawContext.h.

GLuint GetPatchIndexBuffer ( ) const

inline

Returns the GL texture buffer containing the patch control vertices array.

Definition at line 82 of file glDrawContext.h.

GLuint GetPatchParamTextureBuffer ( ) const

inline

Returns the GL texture buffer containing the patch local parameterization data

Definition at line 88 of file glDrawContext.h.

GLuint GetQuadOffsetsTextureBuffer ( ) const

inline

Returns the GL texture buffer containing patch quad offsets data (only used by Gregory patches)

Definition at line 105 of file glDrawContext.h.

GLuint GetVertexTextureBuffer ( ) const

inline

Returns the GL texture buffer containing the vertex data.

Definition at line 93 of file glDrawContext.h.

GLuint GetVertexValenceTextureBuffer ( ) const

inline

Returns the GL texture buffer containing patch vertex valence data (only used by Gregory patches)

Definition at line 99 of file glDrawContext.h.

bool SetFVarDataTexture	(	Far::PatchTables const &	patchTables,
		int	fvarWidth,
		FVarData const &	fvarData
	)

Sets face-varying data buffer

Parameters

patchTables	A valid set of Far::PatchTables
fvarWidth	Total face-varying primvar data width in fvarData
fvarData	Vector containing the face-varying data

Returns

True if the operation was successful

static bool SupportsAdaptiveTessellation ( )

static

true if the GL version detected supports shader tessellation

void UpdateVertexTexture ( VERTEX_BUFFER *  vbo )

inline

Set vbo as a vertex texture (for gregory patch drawing)

Parameters

vbo	the vertex buffer object to update

Definition at line 73 of file glDrawContext.h.

void updateVertexTexture ( GLuint  vbo )

protected

Member Data Documentation

GLuint _fvarDataTextureBuffer

protected

Definition at line 132 of file glDrawContext.h.

GLuint _patchIndexBuffer

protected

Definition at line 129 of file glDrawContext.h.

GLuint _patchParamTextureBuffer

protected

Definition at line 131 of file glDrawContext.h.

GLuint _quadOffsetsTextureBuffer

protected

Definition at line 136 of file glDrawContext.h.

GLuint _vertexTextureBuffer

protected

Definition at line 134 of file glDrawContext.h.

GLuint _vertexValenceTextureBuffer

protected

Definition at line 135 of file glDrawContext.h.

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The documentation for this class was generated from the following file:

• opensubdiv/osd/glDrawContext.h