0023428: Extend OpenGl_Context to use Geometry Shaders extension
[occt.git] / src / OpenGl / OpenGl_PrimitiveArray.hxx
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b311480e 1// Created on: 2011-07-13
2// Created by: Sergey ZERCHANINOV
3// Copyright (c) 2011-2012 OPEN CASCADE SAS
4//
5// The content of this file is subject to the Open CASCADE Technology Public
6// License Version 6.5 (the "License"). You may not use the content of this file
7// except in compliance with the License. Please obtain a copy of the License
8// at http://www.opencascade.org and read it completely before using this file.
9//
10// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
11// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
12//
13// The Original Code and all software distributed under the License is
14// distributed on an "AS IS" basis, without warranty of any kind, and the
15// Initial Developer hereby disclaims all such warranties, including without
16// limitation, any warranties of merchantability, fitness for a particular
17// purpose or non-infringement. Please see the License for the specific terms
18// and conditions governing the rights and limitations under the License.
19
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20
21#ifndef OpenGl_PrimitiveArray_Header
22#define OpenGl_PrimitiveArray_Header
23
5e27df78 24#include <OpenGl_VertexBuffer.hxx>
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25
26#include <InterfaceGraphic_telem.hxx>
27#include <Aspect_InteriorStyle.hxx>
28
29#include <OpenGl_Element.hxx>
30
31struct OPENGL_SURF_PROP;
32
33class OpenGl_PrimitiveArray : public OpenGl_Element
34{
35public:
1d03e66d 36 // OpenGL does not provie a constant for "none" draw mode.
37 // So we define our own one that does not conflict with GL constants
38 // and untilizes common GL invalid value
39 enum
40 {
41 DRAW_MODE_NONE = -1
42 };
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43
44 //! Default constructor
45 OpenGl_PrimitiveArray (CALL_DEF_PARRAY* thePArray);
46
2166f0fa 47 //! Render primitives to the window
5e27df78 48 virtual void Render (const Handle(OpenGl_Workspace)& theWorkspace) const;
49
50 virtual void Release (const Handle(OpenGl_Context)& theContext);
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51
52 CALL_DEF_PARRAY* PArray() const { return myPArray; }
53
54private:
55
5e27df78 56 Standard_Boolean toDrawVbo() const
57 {
58 return !myVbos[VBOVertices].IsNull();
59 }
60
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61 //! VBO initialization procedures
62 Standard_Boolean BuildVBO (const Handle(OpenGl_Workspace)& theWorkspace) const;
63 void clearMemoryOwn() const;
5e27df78 64 void clearMemoryGL (const Handle(OpenGl_Context)& theGlCtx) const;
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65
66 //! Main procedure to draw array
67 void DrawArray (Tint theLightingModel,
68 const Aspect_InteriorStyle theInteriorStyle,
69 Tint theEdgeFlag,
70 const TEL_COLOUR* theInteriorColour,
71 const TEL_COLOUR* theLineColour,
72 const TEL_COLOUR* theEdgeColour,
73 const OPENGL_SURF_PROP* theFaceProp,
74 const Handle(OpenGl_Workspace)& theWorkspace) const;
75
76 //! Auxiliary procedures
77 void DrawEdges (const TEL_COLOUR* theEdgeColour,
78 const Handle(OpenGl_Workspace)& theWorkspace) const;
79
80 void DrawDegeneratesAsPoints (const TEL_COLOUR* theEdgeColour,
81 const float theSkipRatio) const;
82 void DrawDegeneratesAsLines (const TEL_COLOUR* theEdgeColour,
83 const Handle(OpenGl_Workspace)& theWorkspace) const;
84 void DrawDegeneratesAsBBoxs (const TEL_COLOUR* theEdgeColour) const;
85
86 void DrawDegeneratesPointsAsPoints() const;
87 void DrawDegeneratesLinesAsPoints() const;
88 void DrawDegeneratesLinesAsLines (const float theSkipRatio) const;
89 void DrawDegeneratesTrianglesAsPoints() const;
90 void DrawDegeneratesTrianglesAsLines (const float theSkipRatio) const;
91 void DrawDegeneratesTrianglestripsAsPoints() const;
92 void DrawDegeneratesTrianglestripsAsLines (const float theSkipRatio) const;
93 void DrawDegeneratesQuadranglesAsPoints() const;
94 void DrawDegeneratesQuadranglesAsLines (const float theSkipRatio) const;
95 void DrawDegeneratesQuadranglestripsAsPoints() const;
96 void DrawDegeneratesQuadranglestripsAsLines (const float theSkipRatio) const;
97 void DrawDegeneratesPolygonsAsPoints() const;
98 void DrawDegeneratesPolygonsAsLines (const float theSkipRatio) const;
99
100protected:
101
5e27df78 102 //! Destructor
103 virtual ~OpenGl_PrimitiveArray();
104
105protected:
106
107 typedef enum
108 {
109 VBOEdges,
110 VBOVertices,
111 VBOVcolours,
112 VBOVnormals,
113 VBOVtexels,
114 VBOMaxType
115 } VBODataType;
116
117 mutable CALL_DEF_PARRAY* myPArray;
118 mutable Handle(OpenGl_VertexBuffer) myVbos[VBOMaxType];
119 GLint myDrawMode;
120 mutable Standard_Boolean myIsVboInit;
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121
122public:
123
1c35b92f 124 DEFINE_STANDARD_ALLOC
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125
126};
127
128#endif //OpenGl_PrimitiveArray_Header