castan@munnari.oz (Jason Castan) (06/14/88)
1988 ---------- A/UX [E] System 6.0 [E] -Notification Manager System 7.0 [E] -24 bit Color Quickdraw -Interapplication Communication What does the 24 bit QuickDraw mean? Does that mean it uses 24 bits per R/G/B? How does that differ from a 32bit graphics coprocessors which are soon to be here. Thanks, Jason.
kaufman@polya.Stanford.EDU (Marc T. Kaufman) (06/17/88)
In article <2183@munnari.oz> castan@munnari.oz (Jason Castan) writes: > What does the 24 bit QuickDraw mean? > Does that mean it uses 24 bits per R/G/B? Yes, actually 32 bits per pixel, with 8 bits each of R/G/B and 8 bits spare for your use (Alpha, etc.). There are two variations of 24-bit R/G/B defined by Apple: 8-bits per pixel in separate R,G,B planes (chunky-planar), and 32-bits per pixel with R/G/B packed in (chunky). Apple has announced that they will ONLY support chunky format. This has the side effect of restricting such PixMaps to a maximum of 2047 pixel elements per row. > How does that differ from a 32bit graphics coprocessors which are soon > to be here. a coprocessor just manipulates graphics data. 24-bit QuickDraw IS the data format. I don't know which coprocessors, if any, will be conformant to 24-bit QD. ----- Marc Kaufman (kaufman@polya.stanford.edu)