Questions about OpenGL output methods \ VOGONS

Questions about OpenGL output methods

Topic actions

First post, by toal193

Posted on 2009-09-12, 22:53

toal193 Offline

Rank Newbie

Rank: Newbie
Posts: 1
Joined: 2009-09-12, 22:44
Location: Brazil

I want to know what are the differences between "opengl" and "openglnb" output methods (in dosbox.conf>sdl>output), in which cases to use each of them, and whether aspect correction is supported by them (in dosbox.conf>render>aspect). Thanks in advance.

Reply 1 of 2, by wd

Posted on 2009-09-12, 23:02

wd Offline

Rank DOSBox Author

Rank: DOSBox Author
Posts: 10813
Joined: 2003-12-03, 21:23

nb=no bilinear (filtering) so the openglnb is blocky depending on the resolution.

Reply 2 of 2, by HunterZ

Posted on 2009-09-14, 20:00

HunterZ Offline

Rank l33t++

Rank: l33t++
Posts: 6171
Joined: 2003-01-31, 19:04
Location: Seattle

opengl = blurry and smooth
openglnb = crisp and blocky

They do both respect the aspect= setting as well.

I use output=opengl because it can scale to any size and smooth the output in hardware using bilinear filtering.

DOSBox' built-in scalers, on the other hand, can only scale to integer multiples of the source resolution (and even then the built-in scalers seem to disable themselves when running games/apps that use 640x480 or higher VESA or Win3.x modes).

Go to top of page Go to top of page

Back to DOSBox General