🚀 go-pugleaf

In article <31600013@hpcvra.cv.hp.com.>, everett@hpcvra.cv.hp.com. (Everett Kaser) writes:
|> 
|> About the only way to do this on PC display hardware is to read the current
|> background image (using _getimage()) into a scratch save buffer, then use
|> _putimage(,,,_GPSET) to force your new image onto the screen.  Then, when
|> you want to move your image, you first use _putimage(,,,_GPSET) to replace
|> the previous background image (using the saved image from the scratch buffer)
|> and then repeating the previous _getimage()/_putimage() at the new location.

That will only work if the images involved are rectangular. You need to 
use a mask and GPXOR it first then GPAND the real image. You still have to
save the original background. Be careful about moving the image only a small
amount where the next image overlaps the last image. restore background,
get new back ground, xor mask, and the image.


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    eversole@cadence.com
  
    Live long and prosper !