From 20e4b7ca355cdd74ba0cf7baea8d173acac40c36 Mon Sep 17 00:00:00 2001
From: Marco Martin <notmart@gmail.com>
Date: Mon, 6 Dec 2010 22:19:33 +0000
Subject: [PATCH] smooth property (default off)

svn path=/trunk/KDE/kdebase/runtime/; revision=1204366
---
 declarativeimports/core/svgitem.cpp | 25 ++++++++++++++++++++++++-
 declarativeimports/core/svgitem_p.h |  5 +++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/declarativeimports/core/svgitem.cpp b/declarativeimports/core/svgitem.cpp
index 961149376..0cb30ef99 100644
--- a/declarativeimports/core/svgitem.cpp
+++ b/declarativeimports/core/svgitem.cpp
@@ -28,7 +28,8 @@ namespace Plasma
 {
 
 SvgItem::SvgItem(QDeclarativeItem *parent)
-    : QDeclarativeItem(parent)
+    : QDeclarativeItem(parent),
+      m_smooth(false)
 {
     setFlag(QGraphicsItem::ItemHasNoContents, false);
 }
@@ -79,6 +80,20 @@ Plasma::Svg *SvgItem::svg() const
     return m_svg.data();
 }
 
+void SvgItem::setSmooth(const bool smooth)
+{
+    if (smooth == m_smooth) {
+        return;
+    }
+    m_smooth = smooth;
+    update();
+}
+
+bool SvgItem::smooth() const
+{
+    return m_smooth;
+}
+
 void SvgItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
 {
     Q_UNUSED(option);
@@ -87,9 +102,17 @@ void SvgItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, Q
     if (!m_svg) {
         return;
     }
+    //do without painter save, faster and the support can be compiled out
+    const bool wasAntiAlias = painter->testRenderHint(QPainter::Antialiasing);
+    const bool wasSmoothTransform = painter->testRenderHint(QPainter::SmoothPixmapTransform);
+    painter->setRenderHint(QPainter::Antialiasing, m_smooth);
+    painter->setRenderHint(QPainter::SmoothPixmapTransform, m_smooth);
+
     //setContainsMultipleImages has to be done there since m_frameSvg can be shared with somebody else
     m_svg.data()->setContainsMultipleImages(!m_elementID.isEmpty());
     m_svg.data()->paint(painter, boundingRect(), m_elementID);
+    painter->setRenderHint(QPainter::Antialiasing, wasAntiAlias);
+    painter->setRenderHint(QPainter::SmoothPixmapTransform, wasSmoothTransform);
 }
 
 } // Plasma namespace
diff --git a/declarativeimports/core/svgitem_p.h b/declarativeimports/core/svgitem_p.h
index 52c6a9d18..25cd4be91 100644
--- a/declarativeimports/core/svgitem_p.h
+++ b/declarativeimports/core/svgitem_p.h
@@ -32,6 +32,7 @@ class SvgItem : public QDeclarativeItem
     Q_PROPERTY(QString elementId READ elementId WRITE setElementId)
     Q_PROPERTY(Plasma::Svg * svg READ svg WRITE setSvg)
     Q_PROPERTY(QSizeF naturalSize READ naturalSize NOTIFY naturalSizeChanged)
+    Q_PROPERTY(bool smooth READ smooth WRITE setSmooth)
 
 public:
     SvgItem(QDeclarativeItem *parent=0);
@@ -43,6 +44,9 @@ public:
     void setSvg(Plasma::Svg *svg);
     Plasma::Svg *svg() const;
 
+    void setSmooth(const bool smooth);
+    bool smooth() const;
+
     QSizeF naturalSize() const;
 
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
@@ -53,6 +57,7 @@ Q_SIGNALS:
 private:
     QWeakPointer<Plasma::Svg> m_svg;
     QString m_elementID;
+    bool m_smooth;
 };
 }