What does StartVectorDrawing() return?

[Justin]

I think in MaxOS is a CGContext, in linux a cairo context maybe?
And in windows i thought it was a graphics object, but all gdiplus commands fail with that value, what is it?, it can be used?

[breeze4me]

When I checked it before, it looked like an internal memory structure address.
It seems that the graphics object can be obtained as shown below.
However, it's an internal thing and could change at any time.

Code: Select all

Prototype.l ptGdipGraphicsClear(*graphics, color.l)

If OpenLibrary(0, "gdiplus.dll")
  GdipGraphicsClear.ptGdipGraphicsClear = GetFunction(0, "GdipGraphicsClear")
EndIf

If OpenWindow(0, 0, 0, 400, 200, "VectorDrawing", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
  CanvasGadget(0, 0, 0, 400, 200)
  
  a =  StartVectorDrawing(CanvasVectorOutput(0))
  If a
    *graphics = PeekI(a)
    
    MovePathCursor(40, 20)
    For i = 1 To 4
      AddPathLine(80, 0, #PB_Path_Relative)
      AddPathLine(0, 40, #PB_Path_Relative)
    Next i
    
    VectorSourceColor(RGBA(255, 0, 0, 255))
    DashPath(5, 15)
    
    GdipGraphicsClear(*graphics, $FF0000FF)
    
    StopVectorDrawing()
  EndIf
  
  Repeat
    Event = WaitWindowEvent()
  Until Event = #PB_Event_CloseWindow
EndIf

CloseLibrary(#PB_All)

[Justin]

Interesting, many thanks!