From d392df30c09d23a135b6152060e91408c796306b Mon Sep 17 00:00:00 2001
From: Stephan Witt <switt@lyx.org>
Date: Wed, 20 May 2015 07:51:50 +0200
Subject: [PATCH] #9130 Text in main work area isn't rendered with high
 resolution Correctly guard Qt5 code introduced by change
 c053a9394d1075ecad02ccce2f34c95f08c1f00f

---
 src/frontends/qt4/GuiApplication.cpp | 2 ++
 src/frontends/qt4/GuiImage.cpp       | 9 +++++++++
 src/frontends/qt4/GuiView.cpp        | 6 ++++++
 3 files changed, 17 insertions(+)

diff --git a/src/frontends/qt4/GuiApplication.cpp b/src/frontends/qt4/GuiApplication.cpp
index 6eb968cdb0..8bd22c8c03 100644
--- a/src/frontends/qt4/GuiApplication.cpp
+++ b/src/frontends/qt4/GuiApplication.cpp
@@ -570,12 +570,14 @@ QString iconName(FuncRequest const & f, bool unknown)
 bool getPixmap(QPixmap & pixmap, QString const & path)
 {
 	if (pixmap.load(path)) {
+#if QT_VERSION >= 0x050000
 		if (path.endsWith(".svgz") || path.endsWith(".svg") ) {
 			GuiApplication const * guiApp = theGuiApp();
 			if (guiApp != 0) {
 				pixmap.setDevicePixelRatio(guiApp->pixelRatio());
 			}
 		}
+#endif
 		return true;
 	}
 	return false;
diff --git a/src/frontends/qt4/GuiImage.cpp b/src/frontends/qt4/GuiImage.cpp
index 589511cb90..69949f9b0a 100644
--- a/src/frontends/qt4/GuiImage.cpp
+++ b/src/frontends/qt4/GuiImage.cpp
@@ -141,9 +141,14 @@ bool GuiImage::clip(Params const & params)
 		// No clipping is necessary.
 		return false;
 
+#if QT_VERSION >= 0x050000
 	double const pixelRatio = is_transformed_ ? transformed_.devicePixelRatio() : original_.devicePixelRatio();
 	int const new_width  = static_cast<int>((params.bb.xr - params.bb.xl) * pixelRatio);
 	int const new_height = static_cast<int>((params.bb.yt - params.bb.yb) * pixelRatio);
+#else
+	int const new_width  = static_cast<int>((params.bb.xr - params.bb.xl));
+	int const new_height = static_cast<int>((params.bb.yt - params.bb.yb));
+#endif
 
 	QImage const & image = is_transformed_ ? transformed_ : original_;
 
@@ -186,8 +191,12 @@ bool GuiImage::scale(Params const & params)
 	if (params.scale == 100)
 		return false;
 
+#if QT_VERSION >= 0x050000
 	double const pixelRatio = is_transformed_ ? transformed_.devicePixelRatio() : original_.devicePixelRatio();
 	qreal scale = qreal(params.scale) / 100.0 * pixelRatio;
+#else
+	qreal scale = qreal(params.scale) / 100.0;
+#endif
 
 #if (QT_VERSION >= 0x040500) && (QT_VERSION <= 0x040502)
 	// Due to a bug in Qt, LyX will crash for certain
diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index e41a4514f2..7c6a5d25ff 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -110,7 +110,9 @@
 #include <QSplitter>
 #include <QStackedWidget>
 #include <QStatusBar>
+#if QT_VERSION >= 0x050000
 #include <QSvgRenderer>
+#endif
 #include <QtConcurrentRun>
 #include <QTime>
 #include <QTimer>
@@ -162,6 +164,7 @@ public:
 			qt_("version ") + lyx_version : qt_("unknown version");
 		QString imagedir = "images/";
 		FileName fname = imageLibFileSearch(imagedir, "banner", "svgz");
+#if QT_VERSION >= 0x050000
 		QSvgRenderer svgRenderer(toqstr(fname.absFileName()));
 		if (svgRenderer.isValid()) {
 			splash_ = QPixmap(splashSize());
@@ -171,6 +174,9 @@ public:
 		} else {
 			splash_ = getPixmap("images/", "banner", "png");
 		}
+#else
+		splash_ = getPixmap("images/", "banner", "png");
+#endif
 
 		QPainter pain(&splash_);
 		pain.setPen(QColor(0, 0, 0));
-- 
2.39.2