diff options
| author | Pauli Jarvinen <ext-pauli.p.jarvinen@nokia.com> | 2012-06-12 12:27:19 +0300 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-06-19 10:11:06 +0200 |
| commit | a56ff23fb9e6c33ff97b5b0e8619346797626755 (patch) | |
| tree | 8765e7e2e6a70194682f3531cdc09928d0168126 /src/corelib/kernel | |
| parent | a7f0196fe301b962da94563cffc958df220a6c21 (diff) | |
Performance fix for OpenGL drawing
Excessive calling of glFlush() was causing a performance problem when
QML application was being run in the OpenGL graphics mode. There was an
unnecessary call to glFlush() in the function
QGLWindowSurfaceGLPaintDevice::endPaint(). This function gets called
each time a QPainter instance is destroyed, which may happen several
times per each painted screen frame (at least 4 times per frame can
easily happen). Calling glFlush() from endPaint() is not necessary at
all since it will be anyway called from QGLWindowSurface::flush()
(either directly if single-buffered context is used or indirectly by
swapping buffers if double-buffered context is used).
Task-number: ou1cimx1#957423
Change-Id: I89509d8935ad31cc47bfed41a1900b6bb76c2af8
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
Reviewed-by: Pasi Pentikäinen <ext-pasi.a.pentikainen@nokia.com>
Diffstat (limited to 'src/corelib/kernel')
0 files changed, 0 insertions, 0 deletions