Qtopia Core and OpenGL

Simple Integration

The simple integration approach use a ready-made EGL implementation, only requiring a simple custom interface between the EGL interface and QWS. To illustrate, the current release of Qtopia Core provides a simple example interface integrating the "Vanilla" EGL implementation from Hybrid Graphics Ltd. with QWS. The example is located in Qt's src/opengl directory (qegl_qws.*).

Our example interface uses QImage to draw into the backingstore enabling alpha blending with other windows. It is important to notice that the EGL interface requires that the image data is represented using native types. Using the example interface as a basis for your own integration, you must modify the qegl_qws_p.h and qegl_qws.cpp files to ensure that the createNativePixmap() and destroyNativePixmap() functions return the appropiate data. The current implementation converts a QImage object to a "Vanilla" pixmap.

Another approach to simple integration, is to implement the createNativeWindow() function that enables the programmer to draw directly onto the screen. Please note that this approach currently requires more extensive modifications of the implementation files. Please contact Trolltech for more information.