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In lugnet.cad.dev, Don Heyse wrote:
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to be the way to go. Then I built a new (universal?) ldglite with your
static libpng and some patches to render offscreen via the carbon fns. It
didn’t work from an ssh login (carbon is forbidden), but when I logged
locally I got a png file without opening a graphics window. Cool!
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If you used my code as an example for Core GL setup, then the error was due to a
bug in my code. If not, put the following in your CGLPixelFormatAttribute
array, and it should work even via ssh:
CGLPixelFormatAttribute attrs[] =
{
kCGLPFADepthSize, (CGLPixelFormatAttribute)24,
kCGLPFAColorSize, (CGLPixelFormatAttribute)24,
kCGLPFAAlphaSize, (CGLPixelFormatAttribute)8,
kCGLPFAStencilSize, (CGLPixelFormatAttribute)8,
kCGLPFAAccelerated,
kCGLPFAPBuffer,
kCGLPFARemotePBuffer,
(CGLPixelFormatAttribute)0
};
The last setting (kCGLPFARemotePBuffer) is the important one for remote
rendering. Note, thought, that you don’t want that setting set when saving a
file from the UI. I suspect that you can skip the kCGLPFAAccelerated entry.
I updated LDView, and it now works fine remotely via ssh from an account
different than the logged in user (and probably when nobody is logged in; I
can’t test that right now).
--Travis
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In lugnet.cad.dev, Travis Cobbs wrote:
> In lugnet.cad.dev, Don Heyse wrote:
> > to be the way to go. Then I built a new (universal?) ldglite with your
> > static libpng and some patches to render offscreen via the carbon fns. It
> > didn't work from an ssh login (carbon is forbidden), but when I logged
> > locally I got a png file without opening a graphics window. Cool!
>
> If you used my code as an example for Core GL setup, then the error was due
> to a bug in my code. If not, put the following in your
> CGLPixelFormatAttribute array, and it should work even via ssh:
>
> | CGLPixelFormatAttribute attrs[] =
> | {
> | kCGLPFADepthSize, (CGLPixelFormatAttribute)24,
> | kCGLPFAColorSize, (CGLPixelFormatAttribute)24,
> | kCGLPFAAlphaSize, (CGLPixelFormatAttribute)8,
> | kCGLPFAStencilSize, (CGLPixelFormatAttribute)8,
> | kCGLPFAAccelerated,
> | kCGLPFAPBuffer,
> | kCGLPFARemotePBuffer,
> | (CGLPixelFormatAttribute)0
> | };
>
> The last setting (kCGLPFARemotePBuffer) is the important one for remote
> rendering. Note, thought, that you don't want that setting set when
> saving a file from the UI. I suspect that you can skip the
> kCGLPFAAccelerated entry.
>
> I updated LDView, and it now works fine remotely via ssh from an account
> different than the logged in user (and probably when nobody is logged in; I
> can't test that right now).
Actually it turned out that despite the warning message my settings
did work from a remote ssh login as a different user. The old AGL code,
while it worked locally (that was a surprise), did not work remotely and
produced the same warning message:
_RegisterApplication(), FAILED TO establish the default connection to the
WindowServer, _CGSDefaultConnection() is NULL.
When I searched for that I found some dev notes for daemon developnemt
that said carbon and opengl calls were not allowed for this sort of thing.
Since it warned me but still worked I wonder if this was more of a
problem with older versions of OS-X.
I took a peek at your code, but pbuffers make me nervous. I sorta
remember a Dev Connection table that showed them as unsupported on
some of the older Macs. (Like before 10.3)
So I skipped the pbuffer and went straight to ordinary offscreen
memory for the absolute lowest performance. ;-) I only use the stencil
buffer for editing mode, and I forgot to ask for alpha, but got it
anyhow with this setup:
CGLPixelFormatAttribute attribs[] = {
kCGLPFAOffScreen,
kCGLPFAColorSize, 32,
kCGLPFADepthSize, 32,
0};
Have fun,
Don
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