mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-04-10 18:51:21 +03:00
7d3e64ef5e
Inherit NCollection_Buffer from Standard_Transient, do not use incomplete NCollection_Handle. OpenGl_Context, add methods ActiveProgram(),BindProgram() to manage currently active GLSL program. Add method ::ToUseVbo(). OpenGl_ShaderProgram, setup locations of pre-defined vertex attributes occVertex, occNormal, occTexCoord, occColor before linkage. Remove methods OpenGl_ShaderProgram::Bind(), ::BindWithVariables() and ::Unbind() - OpenGl_Context::BindProgram() should be used instead. Introduce class OpenGl_VertexBufferCompat, which emulates VBO behavior on systems without VBO (compatibility with broken OpenGL drivers on Windows). OpenGl_PrimitiveArray - use OpenGl_VertexBufferCompat when VBO is unavailable, remove duplicated code. Use OpenGl_VertexBuffer::HasNormalAttribute() method to activate lighting. OpenGl_Text - use OpenGl_VertexBufferCompat, eliminate duplicated code. Changes in OpenGl_VertexBuffer, drop methods BindFixed()/UnbindFixed(). Superseded by new methods BindAllAttributes()/UnbindAllAttributes() which handle active GLSL program, when it is set.
95 lines
3.9 KiB
C++
95 lines
3.9 KiB
C++
// Created by: Kirill GAVRILOV
|
|
// Copyright (c) 2014 OPEN CASCADE SAS
|
|
//
|
|
// This file is part of Open CASCADE Technology software library.
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify it under
|
|
// the terms of the GNU Lesser General Public License version 2.1 as published
|
|
// by the Free Software Foundation, with special exception defined in the file
|
|
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
|
|
// distribution for complete text of the license and disclaimer of any warranty.
|
|
//
|
|
// Alternatively, this file may be used under the terms of Open CASCADE
|
|
// commercial license or contractual agreement.
|
|
|
|
#ifndef _OpenGl_VertexBufferCompat_HeaderFile
|
|
#define _OpenGl_VertexBufferCompat_HeaderFile
|
|
|
|
#include <OpenGl_VertexBuffer.hxx>
|
|
|
|
//! Compatibility layer for old OpenGL without VBO.
|
|
//! Make sure to pass pointer from GetDataOffset() instead of NULL.
|
|
//! Method GetDataOffset() returns pointer to real data in this class
|
|
//! (while base class OpenGl_VertexBuffer always return NULL).
|
|
//!
|
|
//! Methods Bind()/Unbind() do nothing (do not affect OpenGL state)
|
|
//! and ::GetTarget() is never used.
|
|
//! For this reason there is no analog for OpenGl_IndexBuffer.
|
|
//! Just pass GetDataOffset() to glDrawElements() directly as last argument.
|
|
//!
|
|
//! Class overrides methods init() and subData() to copy data into own memory buffer.
|
|
//! Extra method initLink() might be used to pass existing buffer through handle without copying the data.
|
|
//!
|
|
//! Method Create() creates dummy identifier for this object which should NOT be passed to OpenGL functions.
|
|
class OpenGl_VertexBufferCompat : public OpenGl_VertexBuffer
|
|
{
|
|
|
|
public:
|
|
|
|
//! Create uninitialized VBO.
|
|
Standard_EXPORT OpenGl_VertexBufferCompat();
|
|
|
|
//! Destroy object.
|
|
Standard_EXPORT virtual ~OpenGl_VertexBufferCompat();
|
|
|
|
//! Creates VBO name (id) if not yet generated.
|
|
//! Data should be initialized by another method.
|
|
Standard_EXPORT bool Create (const Handle(OpenGl_Context)& theGlCtx);
|
|
|
|
//! Destroy object - will release memory if any.
|
|
Standard_EXPORT virtual void Release (OpenGl_Context* theGlCtx) Standard_OVERRIDE;
|
|
|
|
//! Bind this VBO.
|
|
Standard_EXPORT virtual void Bind (const Handle(OpenGl_Context)& theGlCtx) const Standard_OVERRIDE;
|
|
|
|
//! Unbind this VBO.
|
|
Standard_EXPORT virtual void Unbind (const Handle(OpenGl_Context)& theGlCtx) const Standard_OVERRIDE;
|
|
|
|
public: //! @name advanced methods
|
|
|
|
//! Initialize buffer with existing data.
|
|
//! Data will NOT be copied by this method!
|
|
Standard_EXPORT bool initLink (const Handle(NCollection_Buffer)& theData,
|
|
const GLuint theComponentsNb,
|
|
const GLsizei theElemsNb,
|
|
const GLenum theDataType);
|
|
|
|
//! Initialize buffer with new data (data will be copied).
|
|
Standard_EXPORT virtual bool init (const Handle(OpenGl_Context)& theGlCtx,
|
|
const GLuint theComponentsNb,
|
|
const GLsizei theElemsNb,
|
|
const void* theData,
|
|
const GLenum theDataType,
|
|
const GLsizei theStride) Standard_OVERRIDE;
|
|
|
|
//! Update part of the buffer with new data.
|
|
Standard_EXPORT virtual bool subData (const Handle(OpenGl_Context)& theGlCtx,
|
|
const GLsizei theElemFrom,
|
|
const GLsizei theElemsNb,
|
|
const void* theData,
|
|
const GLenum theDataType) Standard_OVERRIDE;
|
|
|
|
protected:
|
|
|
|
Handle(NCollection_Buffer) myData; //!< buffer data
|
|
|
|
public:
|
|
|
|
DEFINE_STANDARD_RTTI(OpenGl_VertexBufferCompat) // Type definition
|
|
|
|
};
|
|
|
|
DEFINE_STANDARD_HANDLE(OpenGl_VertexBufferCompat, OpenGl_VertexBuffer)
|
|
|
|
#endif // _OpenGl_VertexBufferCompat_HeaderFile
|