On Jul 13, 2006, at 1:44 PM, Nathanial Ziarek wrote:
My composition works perfectly in QC Viewer, but when I put it on
the web (just a simple "<embed></embed>") and Quicktime opens it,
it doesn't work as well.
<Picture-3.jpg>
<Picture-4.jpg>
On the embedded version, the background doesn't clear, but in the
viewer version, it runs just fine.
On Feb 26, 2006, at 10:21 PM, Pierre-Olivier Latour wrote:
Mark,
I saw someone else post the same request yesterday, and I wanted
to get some clarification on the options.
- We are developing a fairly large app, which as a part of its
functionality, needs to be able to open, render and control
Quartz Composer compositions (from within our app)
- Its vitally important that we get good dynamic control over the
elements of the composition in real time
- We need to write this app in C. The whole of the rest of the
code base for this large app is already C.
So, my questions:
1) Is it possible to play Quartz Composer compositions using C
(perhaps via QuickTime). If so, how do we discover and control
the published inputs
2) If not, what is needed to call the Objective C stuff from C.
Our experience with Cocoa is very limited.
We need to determine the best way to add controlled Quartz
Composer playback to an app which is basically all C.
QuickTime won't get you what you want.
You can mix Obj-C and C code (just be aware of the autorelease
pool - see http://developer.apple.com/documentation/Cocoa/
Conceptual/CarbonCocoaDoc/Articles/WrapperFunctions.html#//
apple_ref/doc/uid/20002398) , so you can use the QC APIs from
inside C code. For simplicity, you should just build the QC
functionality entirely in Obj-C and have just a few C entry points
to call from the rest of the app.
If your app needs to present QC rendering in the UI, you will need
a Cocoa front end and use the QCView. Otherwise, you can just use
the QCRenderer API. Note that in case of the QCRenderer API, it
still needs Cocoa around to create the OpenGL context needed for
rendering.
________________________________________________________
Pierre-Olivier Latour email@hidden
Quartz Composer Team Apple Computer, Inc.
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