08-18-2023, 03:44 PM
_SCREENEXISTS can help catch glitches where you might try and call an API *before* that initial screen is created, but once you have that first screen, it's always going to report a -1 value for you. A delay could be added to _NEWIMAGE or to SCREEN so that anytime the command is called, the program would automatically wait a moment for everything to be properly registered back in the OS, but I really don't think anyone would like that.
OneScreen = _NEWIMAGE(640,480,32)
TwoScreen = _NEWIMAGE(640,480,32)
DO
'draw stuff on OneScreen
SCREEN OneScreen
'copy and draw stuff on TwoScreen
SCREEN TwoScreen
LOOP
Would you *really* want a built in delay in those two SCREEN statements? Those screens already exist. Is there some true need to add that lag into a program?
Same way with the _NEWIMAGE and _COPYIMAGE commands. Would they really need a delay to affect things all the time?
It's really only when you're calling out to API calls that you run into the issue you're seeing here. It's just a basic multi-threading issue at work.
Sometimes, the user just has to be careful of giving things time to run and complete before doing other stuff. Manual pauses/delays are the best way I see to do this, unless someone else has a better working solution.
OneScreen = _NEWIMAGE(640,480,32)
TwoScreen = _NEWIMAGE(640,480,32)
DO
'draw stuff on OneScreen
SCREEN OneScreen
'copy and draw stuff on TwoScreen
SCREEN TwoScreen
LOOP
Would you *really* want a built in delay in those two SCREEN statements? Those screens already exist. Is there some true need to add that lag into a program?
Same way with the _NEWIMAGE and _COPYIMAGE commands. Would they really need a delay to affect things all the time?
It's really only when you're calling out to API calls that you run into the issue you're seeing here. It's just a basic multi-threading issue at work.
Sometimes, the user just has to be careful of giving things time to run and complete before doing other stuff. Manual pauses/delays are the best way I see to do this, unless someone else has a better working solution.