Introduce realDpi{X,Y}(), that (on X11) can return the ral DPI values w/o any Xrdb setting.

Otherwise, they return the same as dpi{X,Y}().

svn path=/trunk/KDE/kdegraphics/okular/; revision=979128

core/utils.cpp

@@ -12,6 +12,8 @@
 #include "utils_p.h"
 
 #include <QtCore/QRect>
+#include <QApplication>
+#include <QDesktopWidget>
 #include <QImage>
 #include <QIODevice>
 
@@ -67,6 +69,18 @@ double Utils::dpiY()
     return QX11Info::appDpiY();
 }
 
+double Utils::realDpiX()
+{
+    const QDesktopWidget* w = QApplication::desktop();
+    return (double(w->width()) * 25.4) / double(w->widthMM());
+}
+
+double Utils::realDpiY()
+{
+    const QDesktopWidget* w = QApplication::desktop();
+    return (double(w->height()) * 25.4) / double(w->heightMM());
+}
+
 #elif defined(Q_WS_MAC)
     /*
      * Code copied from http://developer.apple.com/qa/qa2001/qa1217.html
@@ -140,8 +154,17 @@ double Utils::dpiY()
 
     return err == CGDisplayNoErr ? y : 72.0;
 }
+
+double Utils::realDpiX()
+{
+    return dpiX();
+}
+
+double Utils::realDpiY()
+{
+    return dpiY();
+}
 #else
-#include <QDesktopWidget>
 
 double Utils::dpiX()
 {
@@ -152,6 +175,16 @@ double Utils::dpiY()
 {
     return QDesktopWidget().physicalDpiY();
 }
+
+double Utils::realDpiX()
+{
+    return dpiX();
+}
+
+double Utils::realDpiY()
+{
+    return dpiY();
+}
 #endif
 
 inline static bool isWhite( QRgb argb ) {

core/utils.h

@@ -43,6 +43,26 @@ class OKULAR_EXPORT Utils
      */
     static double dpiY();
 
+    /**
+     * Return the real horizontal DPI of the main display.
+     *
+     * On X11, it can indicate the real horizontal DPI value without any Xrdb
+     * setting. Otherwise, returns the same as dpiX(),
+     *
+     * since 0.9 (KDE 4.3)
+     */
+    static double realDpiX();
+
+    /**
+     * Return the real vertical DPI of the main display
+     *
+     * On X11, it can indicate the real horizontal DPI value without any Xrdb
+     * setting. Otherwise, returns the same as dpiX(),
+     *
+     * since 0.9 (KDE 4.3)
+     */
+    static double realDpiY();
+
     /**
      * Compute the smallest rectangle that contains all non-white pixels in image),
      * in normalized [0,1] coordinates.