AuroraMiddleware/qt5base-lts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
426b363761
qt5base-lts/util/glgen/qopenglversionfunctions.cpp.footer

9 lines
90 B
Plaintext
Raw Normal View History

OpenGL: Add code generator for OpenGL enabler classes This patch provides a code generator that can be executed offline to generate a few classes for enhancing Qt's support for OpenGL. The generated code effectively provides all the benefits of GLEW in its multi-context form but for all platforms and even for ES2. The code generator takes as input the official Khronos gl.spec specification and gl.tm typemap files. These provide all of the information required to create the OpenGL Desktop related classes. The classes for ES2 are hand-crafted as no similar spec files have been published. The generated code supports all OpenGL extensions listed in the Khronos registry for both Desktop OpenGL and ES 2. There is a helper factory class generated which are used by QOpenGLContext::versionFunctions(). This allows code like the following to be written: QOpenGLFunctions_3_3_Core* m_funcs = 0; m_funcs = m_context->versionFunctions<QOpenGLFunctions_3_3_Core>(); if (!m_funcs) { qWarning() << "Could not obtain required OpenGL context version"; exit(1); } if (!m_funcs->initializeOpenGLFunctions()) { qWarning() << "Failed to resolve entry points"; exit(2); } // Get an extension object QOpenGLExtension_ARB_draw_buffers* ext = 0; if (m_context->hasExtension("GL_ARB_draw_buffers")) { ext = new QOpenGLExtension_ARB_draw_buffers(); ext->initializeOpenGLFunctions(m_context); } Such usage will allow much easier and rigorous use of features in modern OpenGL and extensions both in Qt itself and by users of Qt. Follow-up patches will import the generated files and then use these to reinstate OpenGL geometry shaders, add tessellation shaders, and other OpenGL constructs. Change-Id: Id0172e8aa1fd57eb4e6979a96d10fb5a34826426 Reviewed-by: Samuel Rødal <samuel.rodal@digia.com> Reviewed-by: James Turner <james.turner@kdab.com>
2012-08-08 15:43:48 +00:00
#else
// No backends for OpenGL ES 2
Get rid of QT_OPENGL_ES* The QT_OPENGL_ES* macros are leftovers from an earlier, ad hoc configuration system, which has since been replaced by QT_CONFIG. To clean things up in Qt 6, we use the new way instead. Task-number: QTBUG-83467 Change-Id: I578dc7695bff9d5ee303b22e44f60fee22fe0c28 Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-04-14 11:48:28 +00:00
#endif // !QT_CONFIG(opengles2)
OpenGL: Add code generator for OpenGL enabler classes This patch provides a code generator that can be executed offline to generate a few classes for enhancing Qt's support for OpenGL. The generated code effectively provides all the benefits of GLEW in its multi-context form but for all platforms and even for ES2. The code generator takes as input the official Khronos gl.spec specification and gl.tm typemap files. These provide all of the information required to create the OpenGL Desktop related classes. The classes for ES2 are hand-crafted as no similar spec files have been published. The generated code supports all OpenGL extensions listed in the Khronos registry for both Desktop OpenGL and ES 2. There is a helper factory class generated which are used by QOpenGLContext::versionFunctions(). This allows code like the following to be written: QOpenGLFunctions_3_3_Core* m_funcs = 0; m_funcs = m_context->versionFunctions<QOpenGLFunctions_3_3_Core>(); if (!m_funcs) { qWarning() << "Could not obtain required OpenGL context version"; exit(1); } if (!m_funcs->initializeOpenGLFunctions()) { qWarning() << "Failed to resolve entry points"; exit(2); } // Get an extension object QOpenGLExtension_ARB_draw_buffers* ext = 0; if (m_context->hasExtension("GL_ARB_draw_buffers")) { ext = new QOpenGLExtension_ARB_draw_buffers(); ext->initializeOpenGLFunctions(m_context); } Such usage will allow much easier and rigorous use of features in modern OpenGL and extensions both in Qt itself and by users of Qt. Follow-up patches will import the generated files and then use these to reinstate OpenGL geometry shaders, add tessellation shaders, and other OpenGL constructs. Change-Id: Id0172e8aa1fd57eb4e6979a96d10fb5a34826426 Reviewed-by: Samuel Rødal <samuel.rodal@digia.com> Reviewed-by: James Turner <james.turner@kdab.com>
2012-08-08 15:43:48 +00:00
QT_END_NAMESPACE
Reference in New Issue Copy Permalink