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commit 090398d4181797d2284be16026f8e0573fd0579b
Author: Leon Bottou <leon@bottou.org>
Date: Wed Mar 2 20:52:03 2016 -0500
High dpi support for page thumbnails
diff --git a/src/djview.cpp b/src/djview.cpp
index 2571c49..df14110 100644
--- a/src/djview.cpp
+++ b/src/djview.cpp
@@ -137,7 +137,12 @@ QDjViewApplication::QDjViewApplication(int &argc, char **argv)
extern void qt_mac_set_native_menubar(bool);
qt_mac_set_native_menubar(false);
#endif
-
+
+ // Enable highdpi pixmaps
+#if QT_VERSION >= 0x50200
+ setAttribute(Qt::AA_UseHighDpiPixmaps, true);
+#endif
+
// Wire session management signals
connect(this, SIGNAL(saveStateRequest(QSessionManager&)),
this, SLOT(saveSessionState(QSessionManager&)) );
diff --git a/src/qdjviewsidebar.cpp b/src/qdjviewsidebar.cpp
index 38edf45..34e8c3c 100644
--- a/src/qdjviewsidebar.cpp
+++ b/src/qdjviewsidebar.cpp
@@ -603,9 +603,14 @@ QDjViewThumbnails::Model::makeIcon(int pageno) const
if (doc)
{
// render thumbnail
- int w = size;
- int h = size;
- QImage img(size, size, QImage::Format_RGB32);
+#if QT_VERSION >= 0x50200
+ int dpr = djview->devicePixelRatio();
+#else
+ int dpr = 1;
+#endif
+ int w = size * dpr;
+ int h = size * dpr;
+ QImage img(size*dpr, size*dpr, QImage::Format_RGB32);
int status = ddjvu_thumbnail_status(*doc, pageno, 0);
if (status == DDJVU_JOB_NOTSTARTED)
{
@@ -614,9 +619,9 @@ QDjViewThumbnails::Model::makeIcon(int pageno) const
else if (ddjvu_thumbnail_render(*doc, pageno, &w, &h, format,
img.bytesPerLine(), (char*)img.bits() ))
{
- QPixmap pixmap(size,size);
+ QPixmap pixmap(size*dpr,size*dpr);
pixmap.fill();
- QPoint dst((size-w)/2, (size-h)/2);
+ QPoint dst((size*dpr-w)/2, (size*dpr-h)/2);
QRect src(0,0,w,h);
QPainter painter;
painter.begin(&pixmap);
@@ -625,6 +630,9 @@ QDjViewThumbnails::Model::makeIcon(int pageno) const
painter.setPen(Qt::darkGray);
painter.drawRect(dst.x(), dst.y(), w-1, h-1);
painter.end();
+#if QT_VERSION >= 0x50200
+ pixmap.setDevicePixelRatio(dpr);
+#endif
return QIcon(pixmap);
}
}
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