qt4: add upstream QTBUG-31579 patch for QPainter regression

(From OE-Core master rev: a5afc67cbfc32beb3be10392bf9788cfc3610ab1)

(From OE-Core rev: 18e49ebf8d5cc43eca417cd51cabae175f6b5ea4)

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 49 insertions, 0 deletions

diff --git a/meta/recipes-qt/qt4/qt4-4.8.5.inc b/meta/recipes-qt/qt4/qt4-4.8.5.inc
index 95a14f3ddd..99359927cb 100644
--- a/meta/recipes-qt/qt4/qt4-4.8.5.inc
+++ b/meta/recipes-qt/qt4/qt4-4.8.5.inc
@@ -23,6 +23,7 @@ SRC_URI = "http://download.qt-project.org/official_releases/qt/4.8/${PV}/qt-ever
            file://0020-webkit-disable-the-fuse-ld-gold-flag.patch \
            file://0022-Fix-drawing-of-0-width-polylines-from-outside-the-de.patch \
            file://0023-QHttpMultiPart-fix-data-corruption-in-readData-metho.patch \
+           file://0024-Ensure-lastPixel.y-is-also-initalized-to-1-when-nece.patch \
            file://0027-tools.pro-disable-qmeegographicssystemhelper.patch \
            file://g++.conf \
            file://linux.conf \
diff --git a/meta/recipes-qt/qt4/qt4-4.8.5/0024-Ensure-lastPixel.y-is-also-initalized-to-1-when-nece.patch b/meta/recipes-qt/qt4/qt4-4.8.5/0024-Ensure-lastPixel.y-is-also-initalized-to-1-when-nece.patch
new file mode 100644
index 0000000000..7825205310
--- /dev/null
+++ b/meta/recipes-qt/qt4/qt4-4.8.5/0024-Ensure-lastPixel.y-is-also-initalized-to-1-when-nece.patch
@@ -0,0 +1,48 @@
+From 0726127285413829f58618b5b82fb3e2da0c3a74 Mon Sep 17 00:00:00 2001
+From: Andy Shaw <andy.shaw@digia.com>
+Date: Tue, 8 Oct 2013 15:45:42 +0200
+Subject: [PATCH] Ensure lastPixel.y is also initalized to -1 when necessary
+
+Task-number: QTBUG-31579
+
+Upstream-Status: Accepted [https://codereview.qt-project.org/#change,67624]
+Signed-off-by: Jonathan Liu <net147@gmail.com>
+
+Change-Id: Ia4916ac0d384ea523bbfad0dafbc90044da7ec3e
+Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
+(cherry picked from qtbase/f0b950144dde85b65df0c3cf83f7c8df0e94bbbf)
+---
+ src/gui/painting/qcosmeticstroker.cpp | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/gui/painting/qcosmeticstroker.cpp b/src/gui/painting/qcosmeticstroker.cpp
+index 4413170..36616d4 100644
+--- a/src/gui/painting/qcosmeticstroker.cpp
++++ b/src/gui/painting/qcosmeticstroker.cpp
+@@ -305,6 +305,7 @@ void QCosmeticStroker::setup()
+     ymax = deviceRect.bottom() + 2;
+ 
+     lastPixel.x = -1;
++    lastPixel.y = -1;
+ }
+ 
+ // returns true if the whole line gets clipped away
+@@ -533,6 +534,7 @@ void QCosmeticStroker::drawPath(const QVectorPath &path)
+             QPointF p = QPointF(points[0], points[1]) * state->matrix;
+             patternOffset = state->lastPen.dashOffset()*64;
+             lastPixel.x = -1;
++            lastPixel.y = -1;
+ 
+             bool closed;
+             const QPainterPath::ElementType *e = subPath(type, end, points, &closed);
+@@ -587,6 +589,7 @@ void QCosmeticStroker::drawPath(const QVectorPath &path)
+         QPointF movedTo = p;
+         patternOffset = state->lastPen.dashOffset()*64;
+         lastPixel.x = -1;
++        lastPixel.y = -1;
+ 
+         const qreal *begin = points;
+         const qreal *end = points + 2*path.elementCount();
+-- 
+1.8.4
+