GrabImage should have Clipping

[Saki]

GrabImage should have a clipping.
Under all OS it will crash at values <0.
Values higher than max will not cause a crash on Windows and Mac, on Linux the GUI will also crash completely, even if the debugger is turned on.

[BarryG]

Under all OS it will crash at values <0

Doesn't crash here with <0 values (Win 10 Pro, 32-bit PureBasic version 5.72):

Code: Select all

CreateImage(0,640,480)
Debug GrabImage(0,1,-1,-1,-1,-1) ; Runtime error: "The specified 'X' is negative"

Got a snippet to demonstrate the problem?

[Saki]

Hi Barry, I think it's not needed.
Primary Linux like it not.
This function should work similar Box(), simple all over Bulletproof and on all OS at the same.
It is senseless i must ever set self a primary mostly needed clipping.

[#NULL]

I get the runtime error on linux.

[Saki]

Hi, thanks for your Hint.
Have you tested with oversize on Linux ?

Because, it is available you are right.
I use Linux with a VM, this works to 99.9%, but it can create also 0.1% strange effects.

But, a automatically clipping is needed !

GrabImage cuts out areas of an image.
What lies outside the image is absolutely irrelevant and should be clipped automatically.
Under Linux there is an offset of one pixel.
So GrabImage for Linux is incompatible to the other OS.
This should also be adjusted, because it leads also to crashes without a working clipping.