From a7e1118103b367e4e5738104afdc7885536c7a1b Mon Sep 17 00:00:00 2001
From: Paul Lemire <paul.lemire@kdab.com>
Date: Fri, 10 Feb 2023 06:52:03 +0100
Subject: QPaintedTextureImage: fill image with transparency by default

Avoids having junk in the texture on the first paint call if not filling
a rectangle with a QPainter.

Change-Id: Icb65b6f994a9edea5132a2c54406fa0dd817bcb2
Reviewed-by: Mike Krus <mike.krus@kdab.com>
(cherry picked from commit 20d36f07fa7815fb7a05018c93602932e600397b)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
---
 src/render/texture/qpaintedtextureimage.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/render/texture/qpaintedtextureimage.cpp b/src/render/texture/qpaintedtextureimage.cpp
index c03588886..3c64b3bb4 100644
--- a/src/render/texture/qpaintedtextureimage.cpp
+++ b/src/render/texture/qpaintedtextureimage.cpp
@@ -87,6 +87,7 @@ void QPaintedTextureImagePrivate::repaint()
     {
         m_image.reset(new QImage(m_imageSize, QImage::Format_RGBA8888));
         m_image->setDevicePixelRatio(m_devicePixelRatio);
+        m_image->fill(Qt::transparent);
     }
 
     QPainter painter(m_image.data());
-- 
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