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Diffstat (limited to 'src/opengl/qgl.cpp')
| -rw-r--r-- | src/opengl/qgl.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp index e602a05af9..637cfc55a8 100644 --- a/src/opengl/qgl.cpp +++ b/src/opengl/qgl.cpp @@ -4083,6 +4083,11 @@ QPixmap QGLWidget::renderPixmap(int w, int h, bool useContext) Depending on your hardware, you can explicitly select which color buffer to grab with a glReadBuffer() call before calling this function. + + On QNX the back buffer is not preserved when swapBuffers() is called. The back buffer + where this function reads from, might thus not contain the same content as the front buffer. + In order to retrieve what is currently visible on the screen, swapBuffers() + has to be executed prior to this function call. */ QImage QGLWidget::grabFrameBuffer(bool withAlpha) { |