Copyright © 2007-2009 by Apple Inc. All Rights Reserved.
Quartz Composer Plugin
GLImage A Quartz Composer plug-in that produces an image of a
given size containing a diagonal color gradient.
Sample Requirements The plugin was created using the Xcode editor running
under Mac OS X 10.6.x or later.
About the sample A Quartz Composer plug-in that implements a custom
processor patch that produces an image of an
arbitrary size containing a color gradient and
rendered using OpenGL.
Using the Sample Open the project using the Xcode editor which can be found
in /Developer/Applications. From the main menu,
choose "Project", set "Active Configuration" to "Release",
and "Active Target" to "Build & Copy". These settings are
also available from the top left corner of the 'Overview'
pull-down window. Build the project. Once the build has
completed successfully, the plug-in can be used as a
regular QC patch in the Quartz Composer editor (also
installed under /Developer/Applications), by selecting it
from the Library - Plugin panel.
The size for the output image is set in the plug-in
input parameters "Image Pixels Height" and "Image
Pixels Width". By changing the input parameters
"Bottom Color" and "Top Color", the output image
gradient is changed.
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