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[QNX]Clear transparent regions

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If a region gets painted the buffer beneath needs
to be cleared, as it could be that there are
leftovers from the last blit.

Change-Id: I51f19aa010015059e9a6d9d5e5e4f25fb9532d4e
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
This commit is contained in:
Andreas Holzammer 2014-04-29 19:16:23 +02:00 committed by The Qt Project
parent 5a060a5ad3
commit 5883b6a22c
1 changed files with 21 additions and 0 deletions
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21
src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp
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@ -41,6 +41,8 @@
#include "qqnxrasterbackingstore.h"
#include "qqnxrasterwindow.h"
#include "qqnxscreen.h"
#include "qqnxglobal.h"
#include <QtCore/QDebug>
@ -167,6 +169,25 @@ void QQnxRasterBackingStore::beginPaint(const QRegion &region)
m_hasUnflushedPaintOperations = true;
platformWindow()->adjustBufferSize();
if (window()->requestedFormat().alphaBufferSize() != 0) {
foreach (const QRect &r, region.rects()) {
// Clear transparent regions
const int bg[] = {
SCREEN_BLIT_COLOR, 0x00000000,
SCREEN_BLIT_DESTINATION_X, r.x(),
SCREEN_BLIT_DESTINATION_Y, r.y(),
SCREEN_BLIT_DESTINATION_WIDTH, r.width(),
SCREEN_BLIT_DESTINATION_HEIGHT, r.height(),
SCREEN_BLIT_END
};
Q_SCREEN_CHECKERROR(screen_fill(platformWindow()->screen()->nativeContext(),
platformWindow()->renderBuffer().nativeBuffer(), bg),
"failed to clear transparent regions");
}
Q_SCREEN_CHECKERROR(screen_flush_blits(platformWindow()->screen()->nativeContext(), 0),
"failed to flush blits");
}
}
void QQnxRasterBackingStore::endPaint()