From 6bd8c3742e111301481d3658a7c0a970bb10d66b Mon Sep 17 00:00:00 2001
From: Rafael Roquetto <rafael.roquetto@kdab.com>
Date: Mon, 26 May 2014 18:26:45 -0300
Subject: QNX: Fix clearing transparent buffer

Testing whether alphaBufferSize() != 0 does not work, because when no alpha
channel is present, alphaBufferSize() can return '-1', which will cause
non-transparent windows to be  wrongly cleared and an artifact will appear.

Change-Id: Id9e985f105c0bb302cc6f53960a5dbae2acdb921
Reviewed-by: Frank Osterfeld <frank.osterfeld@kdab.com>
Reviewed-by: Wolfgang Bremer <wbremer@blackberry.com>
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
---
 src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp')

diff --git a/src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp b/src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp
index 3109388fb2..e0ecb5c798 100644
--- a/src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp
+++ b/src/plugins/platforms/qnx/qqnxrasterbackingstore.cpp
@@ -170,7 +170,7 @@ void QQnxRasterBackingStore::beginPaint(const QRegion &region)
 
     platformWindow()->adjustBufferSize();
 
-    if (window()->requestedFormat().alphaBufferSize() != 0) {
+    if (window()->requestedFormat().alphaBufferSize() > 0) {
         foreach (const QRect &r, region.rects()) {
             // Clear transparent regions
             const int bg[] = {
-- 
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