Feature request for drawing process.

[ZX80]

Hello, all.

I know it's not possible right now, but is it possible to add this in future?

Code: Select all

If CreateImage(0, w, h) And CreateImage(1, ww, hh)
  If StartDrawing(ImageOutput(0))
    ...
    If StartDrawing(ImageOutput(1))
      ...
      StopDrawing(1)
    EndIf
    ...
    StopDrawing(0)
  EndIf
EndIf

Goal: during scan of image #1 I want to generate image #2 (from part of image data #1). On the fly, without intermediate buffers.

[jacdelad]

Im working on a module for stacked StartDrawing, but I encountered numerous hurdles. But maybe it's worth continuing this project if Fred doesn't implement it natively.

[ZX80]

@jacdelad

Thanks for your reply. It's too bad, that's hard to do. I was hoping to see this in the near future.
P.S. I watch the news about new versions of PB and see the work on the graphics. So I thought...

[STARGÅTE]

How should it work?
How functions like Plot(), Point(), Line(), etc. should behave?
Then all these functions need an additional parameter of the drawing scope.

Code: Select all

If CreateImage(0, w, h) And CreateImage(1, ww, hh)
  *Output0 = StartDrawing(ImageOutput(0))
  If *Output0
    ...
    *Output1 = StartDrawing(ImageOutput(1))
    If *Output1
      ...
      Plot(*Output0, X, Y, Point(*Output1, X2, Y2))
      ...
      StopDrawing(*Output1)
    EndIf
    ...
    StopDrawing(*Output0)
  EndIf
EndIf

[infratec]

As you can read in the help of StartDrawing(), it is possible by using threads.

[jacdelad]

I think using threads is a bad idea for just wanting to use a stackable StartDrawing(). At least the way I use it.

[JHPJHP]

Hi ZX80,

Goal: during scan of image #1 I want to generate image #2 (from part of image data #1). On the fly, without intermediate buffers.

Playing around with this idea, but trying to keep it simple:
- Windows Services & Other Stuff\Other_Stuff\DrawingBuffer\Array.pb, GrabImage.pb

NB*: Comparing the two, GrabImage is over twice as fast as the Array method; see title bar for elapsed time in milliseconds.

[ZX80]

@JHPJHP
Thanks for your example. I'll see, but most likely I will use an arrays list. I think this is the best solution for my case.

@jacdelad

I think using threads is a bad idea for just wanting to use a stackable StartDrawing().

Yes, it will unnecessarily complicate the process.

@STARGÅTE
I don't know. That's why I asked. Yes, probably you are right about additional parameter.

Thanks everyone.