The Color Table Extension

The Color Table Extension

The color table extension, SGI_color_table, defines a new RGBA-format color lookup mechanism. It does not replace the color lookup tables provided by the color maps discussed in the OpenGL Programming Guide but provides additional lookup capabilities.

If the copy texture extension is implemented, this extension also defines methods to initialize the color lookup tables from the framebuffer.

Why Use the Color Table Extension?
Specifying a Color Table
Using Framebuffer Image Data for Color Tables
Where Are the Lookup Tables in the Image Pipeline?
New Functions