Refresh rate manipulation

Graphics and GPU Programming Programming OpenGL

Started by phantom_of_the_opera March 31, 2006 06:11 AM

4 comments, last by phantom_of_the_opera 18 years ago

122

Author

March 31, 2006 06:11 AM

Hello, first of all, sorry if it has been already discussed but I haven't found it yet. So I'd like to know how to change the refresh rate in OpenGL (both Linux & Windows). Thanks in advance the phantom of the Opera

Anonymous

March 31, 2006 06:46 AM

I dont know the function that does it but it is Vsinc that does it.

Falken42

464

March 31, 2006 06:48 AM

For Windows, wglSwapInterval, prehaps?

I don't know how Linux handles control of Vsync, though.

RaptorZero

152

March 31, 2006 07:06 AM

You should have something like this somewhere in the window creation:

	DEVMODE dmScreenSettings;	memset(&dmScreenSettings, 0, sizeof(dmScreenSettings));	dmScreenSettings.dmSize = sizeof(dmScreenSettings);	dmScreenSettings.dmPelsWidth = Width;	dmScreenSettings.dmPelsHeight = Height;	dmScreenSettings.dmBitsPerPel = Bits;	dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;

You should set the dmDisplayFrequency field of the DEVMODE structure and add DM_DISPLAYFREQUENCY to it's flags, like this:

	DEVMODE dmScreenSettings;	memset(&dmScreenSettings, 0, sizeof(dmScreenSettings));	dmScreenSettings.dmSize = sizeof(dmScreenSettings);	dmScreenSettings.dmPelsWidth = Width;	dmScreenSettings.dmPelsHeight = Height;	dmScreenSettings.dmBitsPerPel = Bits;	dmScreenSettings.dmDisplayFrequency = Frequency;	dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY;

Hope that works.

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phantom_of_the_opera

122

Author

April 03, 2006 04:05 AM

I'll give it a try. Thanks.