Preview: scale SVG via QSvgRenderer

src/utils/vutils.cpp

@@ -29,6 +29,8 @@
 #include <QFormLayout>
 #include <QInputDialog>
 #include <QFontDatabase>
+#include <QSvgRenderer>
+#include <QPainter>
 
 #include "vorphanfile.h"
 #include "vnote.h"
@@ -1653,3 +1655,17 @@ int VUtils::elapsedTime(bool p_reset)
 
     return tm.restart();
 }
+
+QPixmap VUtils::svgToPixmap(const QByteArray &p_content, qreal p_factor)
+{
+    QSvgRenderer renderer(p_content);
+    QSize deSz = renderer.defaultSize();
+    if (p_factor > 0) {
+        deSz *= p_factor;
+    }
+
+    QPixmap pm(deSz);
+    QPainter painter(&pm);
+    renderer.render(&painter);
+    return pm;
+}

src/utils/vutils.h

@@ -359,6 +359,10 @@ public:
 
     static int elapsedTime(bool p_reset = false);
 
+    // Render SVG to Pixmap.
+    // @p_factor: < 0 indicates no scaling.
+    static QPixmap svgToPixmap(const QByteArray &p_content, qreal p_factor);
+
     // Regular expression for image link.
     // ![image title]( http://github.com/tamlok/vnote.jpg "alt text" =200x100)
     // Captured texts (need to be trimmed):

src/vlivepreviewhelper.h

@@ -148,6 +148,9 @@ private:
                 if (p_scaleFactor < SCALE_FACTOR_THRESHOLD) {
                     m_image.loadFromData(p_data,
                                          p_format.toLocal8Bit().data());
+                } else {
+                    if (p_format == "svg") {
+                        m_image = VUtils::svgToPixmap(p_data, p_scaleFactor);
                     } else {
                         QPixmap tmpImg;
                         tmpImg.loadFromData(p_data,
@@ -157,6 +160,7 @@ private:
                     }
                 }
             }
+        }
 
         CodeBlockImageCacheEntry(TimeStamp p_ts,
                                  const QString &p_format,
@@ -170,6 +174,9 @@ private:
                 if (p_scaleFactor < SCALE_FACTOR_THRESHOLD) {
                     m_image.loadFromData(p_data.toUtf8(),
                                          p_format.toLocal8Bit().data());
+                } else {
+                    if (p_format == "svg") {
+                        m_image = VUtils::svgToPixmap(p_data.toUtf8(), p_scaleFactor);
                     } else {
                         QPixmap tmpImg;
                         tmpImg.loadFromData(p_data.toUtf8(),
@@ -179,6 +186,7 @@ private:
                     }
                 }
             }
+        }
 
         bool hasImageData() const
         {