[cairo] cairo with open GL backend

[guhan senthilkumar]

sorry. This was the error i got
"error constructing context: the surface type is not appropriate for the
operation."

Guhan

On Wed, Nov 24, 2010 at 12:33 PM, guhan senthilkumar <
guhan.senthilkumar at gmail.com> wrote:

> Hey,
>
> Thanks a lot for giving me the example gears program..
> It compiled without any problem.Infact i was able to run with the x-render
> option without any problems. But when i tried to give a.out -gl along with
> any TEST option( i gave GRAD) i am getting the error,
>
> "error constructing surface: the surface type is not appropriate for the
> operation."
>
> Any ideas on this???
>
> Thanks,
> Guhan
>
> On Sun, Nov 21, 2010 at 3:48 PM, Uli Schlachter <psychon at znc.in> wrote:
>
>> Am 21.11.2010 00:09, Steve Harrington wrote:
>> > On 11/20/2010 02:20 PM, Luca Barbato wrote:
>> >> On 11/19/2010 01:54 PM, guhan senthilkumar wrote:
>> >>
>> >>> Oh like that. Ok Ok.. :)
>> >>> I have driver support for my GPU..
>> >>>
>> >>> Do you have a working example with openGL backed.??
>> >>> Or just please help me get started with writing the most simplest of
>> >>> applications with cairo and openGL backend. :) :)
>> >>>
>> >> http://cgit.freedesktop.org/~anholt/cairogears<http://cgit.freedesktop.org/%7Eanholt/cairogears>might help.
>> >>
>> >> lu
>> >>
>> >>
>> > Helps a lot. Looking at the boilerplate I thought I must have been
>> > mistaken to see so many raw Xlib calls but it seems that is the way this
>> > backend is designed to be used.
>> >
>> > I do have one problem with cairogears however.  I get an error
>> > (cairogears.c line 364) when I run the program:
>> >
>> > LD_LIBRARY_PATH=$PREFIX/lib ./cairogears -gl GRAD
>> > error constructing context: the surface type is not appropriate for the
>> > operation
>> >
>> > although the gears window is drawn but not updated if I comment out the
>> > exit(1) on line 367.  If this is something obvious please let me know.
>> > If not I'll probably run into it again as I adapt this code for my own
>> use.
>>
>> I took a look at this. The cairo_gl_surface_set_size call on line 369
>> causes a
>> CAIRO_STATUS_SURFACE_TYPE_MISMATCH. Anyone got any idea why? Just
>> commenting
>> that line out makes it work (as long as you don't resize the window).
>>
>> Also, just for the fun of it, I added support for cairo's xcb backend
>> (Ugly
>> patch attached). It's ugly, but I wanted to see if there was some
>> difference in
>> speed between xcb and xlib. There isnt, but both are faster than gl here.
>>
>> Cheers,
>> Uli
>> --
>> Q: Because it reverses the logical flow of conversation.
>> A: Why is putting a reply at the top of the message frowned upon?
>>
>> --
>> cairo mailing list
>> cairo at cairographics.org
>> http://lists.cairographics.org/mailman/listinfo/cairo
>>
>
>
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