From 4ca7b23dc007afd58928dc6949cb797903f10951 Mon Sep 17 00:00:00 2001
From: Laszlo Agocs <laszlo.agocs@digia.com>
Date: Mon, 25 Aug 2014 16:53:05 +0200
Subject: [PATCH] Initialize textureId in platform backing store

Setting it initially to 0 is very important, otherwise we will
do a glDeleteTextures with the undefined value.

The result sometimes goes unnoticed and sometimes causes bizarre
issues: For example in the 'textures' example one face of one cube
out of the six did go blank from time to time since the corresponding
texture was deleted by the backingstore.

Change-Id: Id19eb2164471b542b08a277a65edfcb5d0f8248d
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
---
 src/gui/painting/qplatformbackingstore.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gui/painting/qplatformbackingstore.cpp b/src/gui/painting/qplatformbackingstore.cpp
index 25f25f9fa8..407e032027 100644
--- a/src/gui/painting/qplatformbackingstore.cpp
+++ b/src/gui/painting/qplatformbackingstore.cpp
@@ -62,6 +62,7 @@ public:
     QPlatformBackingStorePrivate(QWindow *w)
         : window(w)
 #ifndef QT_NO_OPENGL
+        , textureId(0)
         , blitter(0)
 #endif
     {