1 // Created on: 2013-08-25
2 // Created by: Kirill GAVRILOV
3 // Copyright (c) 2013-2014 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_Caps_H__
17 #define _OpenGl_Caps_H__
19 #include <Standard_DefineHandle.hxx>
20 #include <Standard_Transient.hxx>
21 #include <Handle_Standard_Transient.hxx>
23 //! Class to define graphich driver capabilities.
24 //! Notice that these options will be ignored if particular functionality does not provided by GL driver
25 class OpenGl_Caps : public Standard_Transient
28 public: //! @name flags to disable particular functionality, should be used only for testing purposes!
30 Standard_Boolean vboDisable; //!< flag permits VBO usage, will significantly affect performance (OFF by default)
31 Standard_Boolean pntSpritesDisable; //!< flag permits Point Sprites usage, will significantly affect performance (OFF by default)
32 Standard_Boolean keepArrayData; //!< Disables freeing CPU memory after building VBOs (OFF by default)
34 public: //! @name context creation parameters
37 * Request stereoscopic context (with Quad Buffer). This flag requires support in OpenGL driver.
41 Standard_Boolean contextStereo;
44 * Request debug GL context. This flag requires support in OpenGL driver.
46 * When turned on OpenGL driver emits error and warning messages to provided callback
47 * (see OpenGl_Context - messages will be printed to standard output).
48 * Affects performance - thus should not be turned on by products in released state.
50 * OFF by default. Currently implemented only for Windows (WGL).
52 Standard_Boolean contextDebug;
55 * Disable hardware acceleration.
57 * This flag overrides default behavior, when accelerated context always preferred over software ones:
58 * - on Windows will force Microsoft software implementation;
59 * - on Mac OS X, forces Apple software implementation.
61 * Software implementations are dramatically slower - should never be used.
63 * OFF by default. Currently implemented only for Windows (WGL) and Mac OS X (Cocoa).
65 Standard_Boolean contextNoAccel;
67 public: //! @name flags to activate verbose output
69 //! Print GLSL program compilation/linkage warnings, if any. OFF by default.
70 Standard_Boolean glslWarnings;
72 public: //! @name class methods
74 //! Default constructor - initialize with most optimal values.
75 Standard_EXPORT OpenGl_Caps();
78 Standard_EXPORT virtual ~OpenGl_Caps();
81 Standard_EXPORT OpenGl_Caps& operator= (const OpenGl_Caps& theCopy);
86 OpenGl_Caps (const OpenGl_Caps& );
90 DEFINE_STANDARD_RTTI(OpenGl_Caps) // Type definition
94 DEFINE_STANDARD_HANDLE(OpenGl_Caps, Standard_Transient)
96 #endif // _OpenGl_Caps_H__