QT_BEGIN_NAMESPACE
QQnxRasterBackingStore::QQnxRasterBackingStore(QWindow *window)
- : QPlatformBackingStore(window)
+ : QPlatformBackingStore(window),
+ m_hasUnflushedPaintOperations(false)
{
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window;
void QQnxRasterBackingStore::flush(QWindow *window, const QRegion ®ion, const QPoint &offset)
{
- Q_UNUSED(window);
- Q_UNUSED(offset);
-
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << this->window();
- // visit all pending scroll operations
- for (int i = m_scrollOpList.size() - 1; i >= 0; i--) {
+ QQnxWindow *targetWindow = 0;
+ if (window)
+ targetWindow = static_cast<QQnxWindow *>(window->handle());
- // do the scroll operation
- ScrollOp &op = m_scrollOpList[i];
- QRegion srcArea = op.totalArea.intersected( op.totalArea.translated(-op.dx, -op.dy) );
- m_platformWindow->scroll(srcArea, op.dx, op.dy);
- }
+ if (!targetWindow || targetWindow == m_platformWindow) {
- // clear all pending scroll operations
- m_scrollOpList.clear();
+ // visit all pending scroll operations
+ for (int i = m_scrollOpList.size() - 1; i >= 0; i--) {
+
+ // do the scroll operation
+ ScrollOp &op = m_scrollOpList[i];
+ QRegion srcArea = op.totalArea.intersected( op.totalArea.translated(-op.dx, -op.dy) );
+ m_platformWindow->scroll(srcArea, op.dx, op.dy);
+ }
+
+ // clear all pending scroll operations
+ m_scrollOpList.clear();
+
+ // update the display with newly rendered content
+ m_platformWindow->post(region);
+ } else if (targetWindow) {
+
+ // The contents of the backing store should be flushed to a different window than the
+ // window which owns the buffer.
+ // This typically happens for child windows, since child windows share a backing store with
+ // their top-level window (TLW).
+ // Simply copy the buffer over to the child window, to emulate a painting operation, and
+ // then post the window.
+ //
+ // ### Note that because of the design in the QNX QPA plugin, each window has its own buffers,
+ // even though they might share a backing store. This is unneeded overhead, but I don't think
+ // libscreen allows to have windows without buffers, or does it?
+
+ // We assume that the TLW has been flushed previously and that no changes were made to the
+ // backing store inbetween (### does Qt guarantee this?)
+ Q_ASSERT(!m_hasUnflushedPaintOperations);
+
+ targetWindow->adjustBufferSize();
+ targetWindow->blitFrom(m_platformWindow, offset, region);
+ targetWindow->post(region);
+
+ } else {
+ qWarning() << Q_FUNC_INFO << "flush() called without a valid window!";
+ }
- // update the display with newly rendered content
- m_platformWindow->post(region);
+ m_hasUnflushedPaintOperations = false;
}
void QQnxRasterBackingStore::resize(const QSize &size, const QRegion &staticContents)
// calculate entire region affected by scroll operation (src + dst)
QRegion totalArea = area.translated(dx, dy);
totalArea += area;
+ m_hasUnflushedPaintOperations = true;
// visit all pending scroll operations
for (int i = m_scrollOpList.size() - 1; i >= 0; i--) {
Q_UNUSED(region);
qRasterBackingStoreDebug() << Q_FUNC_INFO << "w =" << window();
+ m_hasUnflushedPaintOperations = true;
m_platformWindow->adjustBufferSize();
}