If I just resize the window, the composition doesn't rescale. If I follow
the workaround below, where I clear and set the view of the GLcontext, the
composition rescales appropriately, however the values reported by the
"Rendering Destination Dimensions" patch don't update.
How does the Quartz Composer App work, where the viewer window can be
resized dynamically, or displayed in fullscreen ? The composition seems to
scale dynamically, without a problem, and I have tested the values from
Rendering Dimensions and it updates perfectly.
I must be missing something fundamental here. May be the answer is that I
should use a QCView rather than a QCRenderer...
I'll be happy to prepare a test case later in the week.
Cheers,
Guy
Pierre-Olivier Latour <email@hidden> wrote:
>> My Quartz composition is in an OpenGLContext in an NSWindow.
>>
>> If I change the size of the window, using setFrame, the composition
>> does not
>> scale accordingly, but remains at the original resolution. i.e. if
>> the width
>> and height of the window are halved, one only sees the top left
>> quarter of
>> the composition area.
>>
>> I have found a workaround :-
>>
>> [_openGLContext clearDrawable];
>> [_window setFrame:rect display:NO];
>> [_openGLContext setView: [_window contentView]];
>>
>>
>> However this seems like a using a hammer to crack a nut. Is there
>> any way to
>> force the QC composition to rescale with the window ?
>
> There's a bug in the QCRenderer where it does pick up automatically
> OpenGL viewport changes and this affect the rendering of some
> compositions. The only workaround is to destroy / recreate the
> renderer when rendering dimensions change.
>
> However, it does not seem that this is what you're encountering: can
> you send me a test case?
>
>
> ________________________________________________________
> Pierre-Olivier Latour email@hidden
> Quartz Composer Architect Graphics & Imaging Team
>
>
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