#Flow tech utilities how to#
The following is a discussion on how to use non-QGL widgets in overlay planes. For many uses of overlays, this makes the technique described below redundant.
Warning: The Qt OpenGL Extension includes direct support for the use of OpenGL overlays.
For more information, see the highly recommended book OpenGL Programming for the X Window System (Mark Kilgard, Addison Wesley Developers Press 1996). X11 overlays are a powerful mechanism for drawing annotations etc., on top of an image without destroying it, thus saving a great deal of image rendering time. If you're new to the subject a good starting point is. The QGL documentation assumes that you are familiar with OpenGL programming. X11 users might like to read the notes on overlays below.
#Flow tech utilities mac os#
When you install Qt for Windows and Mac OS X, the QtOpenGL module is always included. (If your OpenGL headers or libraries are placed in a non-standard directory, you may need to change the QMAKE_INCDIR_OPENGL and/or QMAKE_LIBDIR_OPENGL in the config file for your system). When you install Qt for X11, the configure script will autodetect if OpenGL headers and libraries are installed on your system, and if so, it will include the QtOpenGL module in the Qt library. See the Qt for Embedded Linux and OpenGL documentation for details. To be able to use the OpenGL API in Qt for Embedded Linux, it must be integrated with the Q Window System (QWS). Qt for Embedded Linux supports OpenGL ES (OpenGL for Embedded Systems). It is available on Windows, X11, and Mac OS X.
#Flow tech utilities full#
Warning: The QtOpenGL module is part of the Qt Full Framework Edition and the Qt Open Source Edition. Although the basic functionality provided is very similar to Mark Kilgard's GLUT library, applications using the Qt OpenGL module can take advantage of the whole Qt API for non-OpenGL-specific GUI functionality. The Qt OpenGL module is implemented as a platform-independent Qt/C++ wrapper around the platform-dependent GLX (version 1.3 or later), WGL, or AGL C APIs. To link against the module, add this line to your qmake. To include the definitions of the module's classes, use the following directive: #include It provides an OpenGL widget class that can be used just like any other Qt widget, except that it opens an OpenGL display buffer where you can use the OpenGL API to render the contents. The Qt OpenGL module makes it easy to use OpenGL in Qt applications. in the United States and other countries. Note: OpenGL is a trademark of Silicon Graphics, Inc. The user interface for an OpenGL application must be created with another toolkit, such as Motif on the X platform, Microsoft Foundation Classes (MFC) under Windows, or Qt on both platforms. OpenGL only deals with 3D rendering and provides little or no support for GUI programming issues. OpenGL is a standard API for rendering 3D graphics. The drawing area for top-level windows with Qt for Embedded Linux on EGL/OpenGL ES. Specifies the display format of an OpenGL rendering contextĮncapsulates an OpenGL framebuffer object Used for installing custom colormaps into QGLWidgets Specifies miscellaneous identifiers used in the Qt OpenGL module The QtOpenGL module offers classes that make it easy to use OpenGL in Qt applications.
0 kommentar(er)
