Copyright © 2007-2009 by Apple Inc. All Rights Reserved.
Quartz Composer Application
Poster Shows how to tile the rendering of a QCRenderer's composition
by modifying appropriately the OpenGL projection matrix. Here
"poster" means an image that could be larger than the GPU can
supports. In this case, the GPU generates the image part by
part. It generates one part of the image at each time and
copies the result to the corresponding part of the image.
Sample Requirements The project was created using the Xcode running under Mac OS X
10.6.x or later.
About the sample This sample uses a QCRenderer to render a Quartz Composer
composition in the view window. The user needs to select a
composition by clicking on the "Select Composition" button.
When the "Export Poster…" button is clicked, the sample sets up
the OpenGL context, creates a pixel buffer as the rendering
target and renders the composition. The contents in the pixel
buffer is then copied to the file tile by tile.
Using the Sample Open the project using the Xcode editor which can be found in
/Developer/Applications. Build the project and run.
Changes from Previous Versions n/a
Feedback and Bug Reports Please send all feedback about this sample to:
Please submit any bug reports about this example to