File 0001-Fix-rendering-error-in-some-animated-gifs.... of Package libqt5-qtbase.10741

Overview Repositories Revisions Requests Users Attributes Meta

File 0001-Fix-rendering-error-in-some-animated-gifs.patch of Package libqt5-qtbase.10741

From b674d0d5cc74409d15741a707bd91d2cde8c22bd Mon Sep 17 00:00:00 2001
From: Eirik Aavitsland <eirik.aavitsland@qt.io>
Date: Fri, 12 Aug 2016 16:08:15 +0200
Subject: [PATCH] Fix rendering error in some animated gifs

The code for handling of the rarely used "restore to previous" frame
disposal option would mistakenly clear the entire existing frame. It
looks like this was a copy/paste mistake in the code; the intention
obviously was to clear the newly created backingstore instead.

This fixes the rendering of
http://media1.giphy.com/media/9Jevgp0CgvAnm/giphy.gif

Task-number: QTBUG-55141
Change-Id: I4d344b7733edd62346656154e215c21727f9b6bb
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
---
 src/gui/image/qgifhandler.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gui/image/qgifhandler.cpp b/src/gui/image/qgifhandler.cpp
index 9c748c0373..4197d7e959 100644
--- a/src/gui/image/qgifhandler.cpp
+++ b/src/gui/image/qgifhandler.cpp
@@ -409,7 +409,7 @@ int QGIFFormat::decode(QImage *image, const uchar *buffer, int length,
                         backingstore = QImage(qMax(backingstore.width(), w),
                                               qMax(backingstore.height(), h),
                                               QImage::Format_RGB32);
-                        memset(bits, 0, image->byteCount());
+                        memset(backingstore.bits(), 0, backingstore.byteCount());
                     }
                     const int dest_bpl = backingstore.bytesPerLine();
                     unsigned char *dest_data = backingstore.bits();
-- 
2.16.4

Places

File 0001-Fix-rendering-error-in-some-animated-gifs.patch of Package libqt5-qtbase.10741

Places