1 // Created on: 2011-10-20
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_GraphicDriver_HeaderFile
17 #define _OpenGl_GraphicDriver_HeaderFile
19 #include <Graphic3d_GraphicDriver.hxx>
21 #include <Aspect_Display.hxx>
22 #include <Aspect_DisplayConnection.hxx>
23 #include <Aspect_GradientFillMethod.hxx>
24 #include <Aspect_FillMethod.hxx>
25 #include <Aspect_TypeOfTriedronPosition.hxx>
26 #include <Aspect_Handle.hxx>
27 #include <Aspect_RenderingContext.hxx>
29 #include <Graphic3d_CView.hxx>
30 #include <Graphic3d_CStructure.hxx>
31 #include <Graphic3d_TextPath.hxx>
32 #include <Graphic3d_HorizontalTextAlignment.hxx>
33 #include <Graphic3d_VerticalTextAlignment.hxx>
34 #include <Graphic3d_GraduatedTrihedron.hxx>
35 #include <Graphic3d_TypeOfComposition.hxx>
36 #include <Graphic3d_ExportFormat.hxx>
37 #include <Graphic3d_SortType.hxx>
38 #include <Graphic3d_BufferType.hxx>
39 #include <NCollection_DataMap.hxx>
40 #include <OpenGl_Context.hxx>
41 #include <OpenGl_MapOfZLayerSettings.hxx>
42 #include <Quantity_PlaneAngle.hxx>
43 #include <Quantity_NameOfColor.hxx>
44 #include <Standard_CString.hxx>
45 #include <TColStd_Array1OfInteger.hxx>
46 #include <TColStd_Array2OfReal.hxx>
47 #include <TColStd_HArray1OfByte.hxx>
48 #include <TColStd_HArray1OfReal.hxx>
49 #include <TColStd_MapOfInteger.hxx>
52 class Graphic3d_Vector;
54 class Graphic3d_Vertex;
55 class TCollection_ExtendedString;
58 class OpenGl_Structure;
63 //! Tool class to implement consistent state counter
64 //! for objects inside the same driver instance.
65 class OpenGl_StateCounter
69 OpenGl_StateCounter() : myCounter (0) { }
71 Standard_Size Increment() { return ++myCounter; }
75 Standard_Size myCounter;
78 class OpenGl_GraphicDriver;
80 DEFINE_STANDARD_HANDLE(OpenGl_GraphicDriver,Graphic3d_GraphicDriver)
82 //! This class defines an OpenGl graphic driver
83 class OpenGl_GraphicDriver : public Graphic3d_GraphicDriver
88 //! @param theDisp connection to display, required on Linux but optional on other systems
89 //! @param theToInitialize perform initialization of default OpenGL context on construction
90 Standard_EXPORT OpenGl_GraphicDriver (const Handle(Aspect_DisplayConnection)& theDisp,
91 const Standard_Boolean theToInitialize = Standard_True);
94 Standard_EXPORT virtual ~OpenGl_GraphicDriver();
96 //! Release default context.
97 Standard_EXPORT void ReleaseContext();
99 //! Perform initialization of default OpenGL context.
100 Standard_EXPORT Standard_Boolean InitContext();
102 #if defined(HAVE_EGL) || defined(HAVE_GLES2) || defined(OCCT_UWP) || defined(__ANDROID__) || defined(__QNX__)
103 //! Initialize default OpenGL context using existing one.
104 //! @param theEglDisplay EGL connection to the Display
105 //! @param theEglContext EGL rendering context
106 //! @param theEglConfig EGL configuration
107 Standard_EXPORT Standard_Boolean InitEglContext (Aspect_Display theEglDisplay,
108 Aspect_RenderingContext theEglContext,
112 //! Request limit of graphic resource of specific type.
113 Standard_EXPORT virtual Standard_Integer InquireLimit (const Graphic3d_TypeOfLimit theType) const Standard_OVERRIDE;
117 Standard_EXPORT virtual Handle(Graphic3d_CStructure) CreateStructure (const Handle(Graphic3d_StructureManager)& theManager) Standard_OVERRIDE;
119 Standard_EXPORT virtual void RemoveStructure (Handle(Graphic3d_CStructure)& theCStructure) Standard_OVERRIDE;
121 Standard_EXPORT virtual Handle(Graphic3d_CView) CreateView (const Handle(Graphic3d_StructureManager)& theMgr) Standard_OVERRIDE;
123 Standard_EXPORT virtual void RemoveView (const Handle(Graphic3d_CView)& theView) Standard_OVERRIDE;
125 Standard_EXPORT virtual Handle(OpenGl_Window) CreateRenderWindow (const Handle(Aspect_Window)& theWindow, const Aspect_RenderingContext theContext);
129 Standard_EXPORT void TextSize (const Handle(Graphic3d_CView)& theView,
130 const Standard_CString theText,
131 const Standard_ShortReal theHeight,
132 Standard_ShortReal& theWidth,
133 Standard_ShortReal& theAscent,
134 Standard_ShortReal& theDescent) const Standard_OVERRIDE;
136 Standard_EXPORT Standard_ShortReal DefaultTextHeight() const Standard_OVERRIDE;
138 Standard_EXPORT Standard_Boolean ViewExists (const Handle(Aspect_Window)& theWindow, Handle(Graphic3d_CView)& theView) Standard_OVERRIDE;
142 //! Adds a new top-level z layer with ID theLayerId for all views. Z layers allow drawing structures in higher layers
143 //! in foreground of structures in lower layers. To add a structure to desired layer on display it is necessary to
144 //! set the layer index for the structure. The passed theLayerId should be not less than 0 (reserved for default layers).
145 Standard_EXPORT void AddZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
147 //! Removes Z layer. All structures displayed at the moment in layer will be displayed in
148 //! default layer (the bottom-level z layer). By default, there are always default
149 //! bottom-level layer that can't be removed. The passed theLayerId should be not less than 0
150 //! (reserved for default layers that can not be removed).
151 Standard_EXPORT void RemoveZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
153 //! Returns list of Z layers defined for the graphical driver.
154 Standard_EXPORT void ZLayers (TColStd_SequenceOfInteger& theLayerSeq) const Standard_OVERRIDE;
156 //! Sets the settings for a single Z layer.
157 Standard_EXPORT void SetZLayerSettings (const Graphic3d_ZLayerId theLayerId, const Graphic3d_ZLayerSettings& theSettings) Standard_OVERRIDE;
159 //! Returns the settings of a single Z layer.
160 Standard_EXPORT virtual const Graphic3d_ZLayerSettings& ZLayerSettings (const Graphic3d_ZLayerId theLayerId) const Standard_OVERRIDE;
164 //! @return the visualization options
165 inline const OpenGl_Caps& Options() const
167 return *myCaps.operator->();
170 //! @return the visualization options
171 inline OpenGl_Caps& ChangeOptions()
173 return *myCaps.operator->();
176 //! Specify swap buffer behavior.
177 Standard_EXPORT void SetBuffersNoSwap (const Standard_Boolean theIsNoSwap);
179 //! VBO usage can be forbidden by this method even if it is supported by GL driver.
180 //! Notice that disabling of VBO will cause rendering performance degradation.
181 //! Warning! This method should be called only before any primitives are displayed in GL scene!
182 Standard_EXPORT void EnableVBO (const Standard_Boolean theToTurnOn) Standard_OVERRIDE;
184 //! Returns information about GPU memory usage.
185 //! Please read OpenGl_Context::MemoryInfo() for more description.
186 Standard_EXPORT Standard_Boolean MemoryInfo (Standard_Size& theFreeBytes,
187 TCollection_AsciiString& theInfo) const Standard_OVERRIDE;
191 //! Method to retrieve valid GL context.
192 //! Could return NULL-handle if no window created by this driver.
193 Standard_EXPORT const Handle(OpenGl_Context)& GetSharedContext() const;
195 #if defined(HAVE_EGL) || defined(HAVE_GLES2) || defined(OCCT_UWP) || defined(__ANDROID__) || defined(__QNX__)
196 Aspect_Display getRawGlDisplay() const { return myEglDisplay; }
197 Aspect_RenderingContext getRawGlContext() const { return myEglContext; }
198 void* getRawGlConfig() const { return myEglConfig; }
201 //! Insert index layer at proper position.
202 Standard_EXPORT void addZLayerIndex (const Graphic3d_ZLayerId theLayerId);
206 DEFINE_STANDARD_RTTIEXT(OpenGl_GraphicDriver,Graphic3d_GraphicDriver)
210 Standard_Boolean myIsOwnContext; //!< indicates that shared context has been created within OpenGl_GraphicDriver
211 #if defined(HAVE_EGL) || defined(HAVE_GLES2) || defined(OCCT_UWP) || defined(__ANDROID__) || defined(__QNX__)
212 Aspect_Display myEglDisplay; //!< EGL connection to the Display : EGLDisplay
213 Aspect_RenderingContext myEglContext; //!< EGL rendering context : EGLContext
214 void* myEglConfig; //!< EGL configuration : EGLConfig
217 Handle(OpenGl_Caps) myCaps;
218 NCollection_Map<Handle(OpenGl_View)> myMapOfView;
219 NCollection_DataMap<Standard_Integer, OpenGl_Structure*> myMapOfStructure;
223 TColStd_MapOfInteger myLayerIds;
224 TColStd_SequenceOfInteger myLayerSeq;
225 OpenGl_MapOfZLayerSettings myMapOfZLayerSettings;
229 //! State counter for OpenGl structures.
230 OpenGl_StateCounter* GetStateCounter() const { return &myStateCounter; }
232 //! Returns unique ID for primitive arrays.
233 Standard_Size GetNextPrimitiveArrayUID() const { return myUIDGenerator.Increment(); }
237 mutable OpenGl_StateCounter myStateCounter; //!< State counter for OpenGl structures.
238 mutable OpenGl_StateCounter myUIDGenerator; //!< Unique ID counter for primitive arrays.
242 #endif //_OpenGl_GraphicDriver_HeaderFile