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Implemented default refresh rate discovery.

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the_fiddler 2008-01-25 15:04:10 +00:00
parent 733a1dd272
commit a973479910
1 changed files with 49 additions and 22 deletions
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71
Source/OpenTK/Platform/X11/X11XrandrDisplayDevice.cs
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@ -26,36 +26,63 @@ namespace OpenTK.Platform.X11
// Get available resolutions. Then, for each resolution get all
// available rates.
// TODO: Find a way to get all available depths, too.
//lock (display_lock) // TODO: Global X11 lock.
// TODO: Global X11 lock.
for (int screen = 0; screen < API.ScreenCount; screen++)
{
for (int screen = 0; screen < API.ScreenCount; screen++)
List<DisplayResolution> available_res;
float refreshRate;
FindAvailableResolutions(screen, out available_res);
FindCurrentRefreshRate(screen, out refreshRate);
// The default resolution (but not refresh rate) is the first one in available_res.
// Its refresh rate is discovered by the FindCurrentRefreshRate call.
new DisplayDevice(new DisplayResolution(available_res[0].Width, available_res[0].Height, 24, refreshRate),
screen == API.DefaultScreen, available_res);
}
}
internal X11XrandrDisplayDevice() { }
#endregion
#region --- Private Methods ---
#region static void FindAvailableResolutions(int screen, out List<DisplayResolution> resolutions)
static void FindAvailableResolutions(int screen, out List<DisplayResolution> resolutions)
{
resolutions = new List<DisplayResolution>();
unsafe
{
XRRScreenSize[] array = Functions.XRRSizes(API.DefaultDisplay, screen);
if (array == null)
throw new NotSupportedException("XRandR extensions not available.");
int resolution = 0;
foreach (XRRScreenSize size in array)
{
List<DisplayResolution> resolutions = new List<DisplayResolution>();
unsafe
{
XRRScreenSize[] array = Functions.XRRSizes(API.DefaultDisplay, screen);
if (array == null)
throw new NotSupportedException("XRandR extensions not available.");
short[] rates = Functions.XRRRates(API.DefaultDisplay, screen, resolution);
int resolution = 0;
foreach (XRRScreenSize size in array)
{
short[] rates = Functions.XRRRates(API.DefaultDisplay, screen, resolution);
foreach (short rate in rates)
resolutions.Add(new DisplayResolution(size.Width, size.Height, 24, (float)rate));
++resolution;
}
}
// Construct a default device for testing purposes.
new DisplayDevice(resolutions[0], screen == API.DefaultScreen, resolutions);
// TODO: Is the rate != 0 conditional correct? It seems that XRRRates returns 0
// for modes that are larger than the screen can support (?)
foreach (short rate in rates)
if (rate != 0)
resolutions.Add(new DisplayResolution(size.Width, size.Height, 24, (float)rate));
++resolution;
}
}
}
public X11XrandrDisplayDevice()
#endregion
static void FindCurrentRefreshRate(int screen, out float refreshRate)
{
IntPtr screen_config_ptr = Functions.XRRGetScreenInfo(API.DefaultDisplay, API.RootWindow);
ushort rotation = 0;
int size = Functions.XRRConfigCurrentConfiguration(screen_config_ptr, ref rotation);
short rate = Functions.XRRConfigCurrentRate(screen_config_ptr);
Functions.XRRFreeScreenConfigInfo(screen_config_ptr);
refreshRate = (float)rate;
}
#endregion