Anyone using pbuffers with sdl?

SDL Development
1

hiya,

…I’m trying to learn about the neat tricks one can do with render to
texture using pbuffers on OSX, but haven’t had any luck…since I’m
using SDL, and I know that the OSX code is using cocoa NSViews, am I
right to assume that I can get pbuffer support using CGL? Or do I also
have to use NSGL? Either way, has anyone been successful with single
contexts as opposed to shared contexts?

help!
jamie

2

This tutorial seems to accomplish it what you’re
asking:

http://www.gametutorials.com/download/Ports/OpenGL/RenderToTexture_SDL.zip

To run this guy’s tutorials on Mac OS X, I had to make
the following changes:

Makefile:
Line 1: Change “g++” to "g++ -I./
Line 6: Remove “-lgl -lglu”

Init.cpp
Line 293: Change “int main(void)” to “int main(int
argc, char **argv)”

And then I created a symbolic link. This is my shity
hack for compiling OpenGL applications from the
command-line on OSX, no one seems to be able to offer
me a less make-shift solution. If you know one, please
tell me!

$ ln -s
/System/Library/Frameworks/OpenGL.framework/Headers GL

Hope this helps!__________________________________
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3

James Tittle II wrote:

hiya,

…I’m trying to learn about the neat tricks one can do with render to
texture using pbuffers on OSX, but haven’t had any luck…since I’m
using SDL, and I know that the OSX code is using cocoa NSViews, am I
right to assume that I can get pbuffer support using CGL? Or do I
also have to use NSGL? Either way, has anyone been successful with
single contexts as opposed to shared contexts?

As far as I know, there is no pbuffer support for OSX in SDL, only for
windows and x11.
If you look at the return from SDL_GetError, it will probably say that
pbuffers are unsupported.

Stephane

4

hey Donny,

…thanks for the link: it may just work for me :wink: As far as
avoiding a symbolic link to the OpenGL.framework, I usually just go in
and change the #include’s as follows:

include <OpenGL/gl.h>

include <OpenGL/glu.h>

…and then add “-framework OpenGL” instead of “-lgl -lglu”…

thanx again!
jamieOn Jun 12, 2004, at 9:37 PM, Donny Viszneki wrote:

And then I created a symbolic link. This is my shity
hack for compiling OpenGL applications from the
command-line on OSX, no one seems to be able to offer
me a less make-shift solution. If you know one, please
tell me!

$ ln -s
/System/Library/Frameworks/OpenGL.framework/Headers GL