diff options
Diffstat (limited to 'src/opengl')
| -rw-r--r-- | src/opengl/qwindowsurface_gl.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp index b8716ce..7243f02 100644 --- a/src/opengl/qwindowsurface_gl.cpp +++ b/src/opengl/qwindowsurface_gl.cpp @@ -520,9 +520,10 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint & // did_paint is set to true in ::beginPaint. ::beginPaint means that we // at least cleared the background (= painted something). In EGL API it's a - // mistakte to call swapBuffers if nothing was painted. This check protects - // the flush func from being executed if it's for nothing. - if (!d_ptr->did_paint) + // mistake to call swapBuffers if nothing was painted unless + // EGL_BUFFER_PRESERVED is set. This check protects the flush func from + // being executed if it's for nothing. + if (!hasPartialUpdateSupport() && !d_ptr->did_paint) return; QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget(); |