Desktop vs OpenGL resolution

OpenGL
1

hello,

Can I run my OpenGL window in a different resolution than my Windows desktop?

If my Windows desktop is set to 1680x1050, can I run my OpenGL game on the screen at 800x600, but still cover the whole screen?

I’m looking for high frame-rates for users with slow PCs.

Thanks.

2

Before creating the window and rendering context do:


// Get the current settings to query the frequency.

DEVMODE mode;
mode.dmSize        = sizeof(DEVMODE);
mode.dmDriverExtra = 0;

EnumDisplaySettings(0, ENUM_CURRENT_SETTINGS, &mode);

// Change to new mode.

mode.dmPelsWidth  = 800; // New width.
mode.dmPelsHeight = 600; // New height.
mode.dmBitsPerPel = 32;
mode.dmFields     = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL | DM_DISPLAYFREQUENCY;

ChangeDisplaySettings(&mode, CDS_FULLSCREEN);

ChangeDisplaySettings returns DISP_CHANGE_SUCCESSFUL if all went well.

To go back to desktop resolution:


ChangeDisplaySettings(0, 0);

Have fun.

3

That works great, EvilOne! You’re not so evil.

Thanks for the quick reply and super code.

4

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