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Portable Network Graphic  |  1990-09-25  |  14.9 KB  |  552x727  |  1-bit (2 colors)
   ocr: Suppose we are writing a program to display PICTS on a four or: more bit-depth screen. The built- in color table for fowr bits ('clut' ID 4, in ROM resources) contains a smattering of different colors. I the PICT we wish to display contains only shades of red, we'd want to have as many shades of red as possible (14 on a four-bit screen) in the screen's' clut'. There are actually 16 different colors available, bwt 2 of them, black and white, are never changed. This guarantees that menus, windows, and other swh things that are always black on the Mlacintosh will be visible in their intended colo ...