Use float rather than unsigned for refresh rate

[libs/gui.git] / source / graphics / display.cpp

diff --git a/source/graphics/display.cpp b/source/graphics/display.cpp
index deaa5b560e7819db973b1f6a9fc2d94068bdf65e..40112a35f9408760c5f6ab05ea286033403282b1 100644 (file)
--- a/source/graphics/display.cpp
+++ b/source/graphics/display.cpp
@@ -1,3 +1,4 @@
+#include <cmath>
 #include "display.h"
 #include "display_private.h"
 #include "window.h"
@@ -17,6 +18,54 @@ void Display::remove_window(Window &wnd)
        priv->windows.erase(wnd.get_private().window);
 }
 
+const VideoMode &Display::get_desktop_mode() const
+{
+       if(!primary_monitor || !primary_monitor->desktop_mode)
+               throw logic_error("no desktop mode");
+       return *primary_monitor->desktop_mode;
+}
+
+void Display::restore_mode()
+{
+       for(list<Monitor>::const_iterator i=monitors.begin(); i!=monitors.end(); ++i)
+               if(i->desktop_mode)
+                       set_mode(*i->desktop_mode, false);
+}
+
+const VideoMode *Display::find_mode(const VideoMode &mode, float rate_tolerance) const
+{
+       const VideoMode *closest = 0;
+       float rate_diff = mode.rate;
+       for(list<VideoMode>::const_iterator i=modes.begin(); i!=modes.end(); ++i)
+       {
+               if(mode.monitor && i->monitor!=mode.monitor)
+                       continue;
+               if(mode.rate && (i->rate<mode.rate-rate_tolerance || i->rate>mode.rate+rate_tolerance))
+                       continue;
+               if(i->width!=mode.width || i->height!=mode.height)
+                       continue;
+
+               if(mode.rate)
+               {
+                       float d = abs(i->rate-mode.rate);
+                       if(d<rate_diff)
+                       {
+                               closest = &*i;
+                               rate_diff = d;
+                       }
+               }
+               else
+                       return &*i;
+       }
+
+       return closest;
+}
+
+const VideoMode *Display::find_mode(unsigned width, unsigned height) const
+{
+       return find_mode(VideoMode(width, height));
+}
+
 void Display::tick()
 {
        check_error();