Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
When porting color, shading, and writemask code to OpenGL, keep the following points in mind:
- Though you can set color-map indexes with the OpenGL glIndex function, OpenGL does not have a function for loading color-map indexes.
- Color values are normalized to their data type. (For information about color values, see glColor).
- There is no simple equivalent for cpack.
- You may have to translate code that includes the c or color functions to glClearColor or glClearIndex instead of glColor or glIndex.
- The RGBA writemask applies to each component but not for each bit.
- IRIS GL provides defined color constants: BLACK, BLUE, RED, GREEN, MAGENTA, CYAN, YELLOW, and WHITE. OpenGL does not provide these constants.
This topic includes information on the following.