1 // Created on: 2011-07-13
2 // Created by: Sergey ZERCHANINOV
3 // Copyright (c) 2011-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef OpenGl_PrimitiveArray_Header
17 #define OpenGl_PrimitiveArray_Header
19 #include <OpenGl_IndexBuffer.hxx>
21 #include <InterfaceGraphic_Graphic3d.hxx>
22 #include <Aspect_InteriorStyle.hxx>
23 #include <Aspect_TypeOfMarker.hxx>
24 #include <Graphic3d_TypeOfPrimitiveArray.hxx>
25 #include <Graphic3d_IndexBuffer.hxx>
26 #include <Graphic3d_BoundBuffer.hxx>
28 #include <OpenGl_Element.hxx>
30 class OpenGl_GraphicDriver;
31 class Handle(OpenGl_ShaderProgram);
33 //! Class for rendering of arbitrary primitive array.
34 class OpenGl_PrimitiveArray : public OpenGl_Element
37 // OpenGL does not provide a constant for "none" draw mode.
38 // So we define our own one that does not conflict with GL constants
39 // and utilizes common GL invalid value
45 //! Default constructor
46 OpenGl_PrimitiveArray (const OpenGl_GraphicDriver* theDriver,
47 const Graphic3d_TypeOfPrimitiveArray theType,
48 const Handle(Graphic3d_IndexBuffer)& theIndices,
49 const Handle(Graphic3d_Buffer)& theAttribs,
50 const Handle(Graphic3d_BoundBuffer)& theBounds);
52 //! Render primitives to the window
53 virtual void Render (const Handle(OpenGl_Workspace)& theWorkspace) const;
55 virtual void Release (OpenGl_Context* theContext);
57 //! @return primitive type (GL_LINES, GL_TRIANGLES and others)
58 GLint DrawMode() const { return myDrawMode; }
60 //! @return indices array
61 const Handle(Graphic3d_IndexBuffer)& Indices() const { return myIndices; }
63 //! @return attributes array
64 const Handle(Graphic3d_Buffer)& Attributes() const { return myAttribs; }
66 //! @return bounds array
67 const Handle(Graphic3d_BoundBuffer)& Bounds() const { return myBounds; }
69 //! Returns unique ID of primitive array.
70 const Standard_Size GetUID() const { return myUID; }
74 //! Initialize normal (OpenGL-provided) VBO
75 Standard_Boolean initNormalVbo (const Handle(OpenGl_Context)& theCtx) const;
77 //! VBO initialization procedures
78 //! @param theCtx bound GL context
79 //! @param theToKeepData when true, myAttribs will not be nullified after VBO creation
80 Standard_Boolean buildVBO (const Handle(OpenGl_Context)& theCtx,
81 const Standard_Boolean theToKeepData) const;
82 void clearMemoryGL (const Handle(OpenGl_Context)& theGlCtx) const;
84 //! Main procedure to draw array
85 void drawArray (const Handle(OpenGl_Workspace)& theWorkspace,
86 const Graphic3d_Vec4* theFaceColors,
87 const Standard_Boolean theHasVertColor) const;
89 //! Auxiliary procedures
90 void drawEdges (const TEL_COLOUR* theEdgeColour,
91 const Handle(OpenGl_Workspace)& theWorkspace) const;
93 void drawMarkers (const Handle(OpenGl_Workspace)& theWorkspace) const;
98 virtual ~OpenGl_PrimitiveArray();
102 mutable Handle(OpenGl_VertexBuffer) myVboIndices;
103 mutable Handle(OpenGl_VertexBuffer) myVboAttribs;
105 mutable Handle(Graphic3d_IndexBuffer) myIndices;
106 mutable Handle(Graphic3d_Buffer) myAttribs;
107 mutable Handle(Graphic3d_BoundBuffer) myBounds;
109 mutable Standard_Boolean myIsVboInit;
111 Standard_Size myUID; //!< Unique ID of primitive array.
115 DEFINE_STANDARD_ALLOC
119 #endif //OpenGl_PrimitiveArray_Header