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Issue with two CreateCanvas calls

Archives Forums/BlitzMax Bug Reports/Issue with two CreateCanvas calls

matibee(Posted 2010) [#1]
This is an odd issue with the latest version of MaxGUI. The code below creates two canvases but the second is created the same size as the first instead of the requested size. It works if the creation order is reversed.

SuperStrict
Import MaxGui.Drivers

Global window:TGadget = CreateWindow:TGadget("Ed",60,60,1010,670,Null,WINDOW_TITLEBAR| WINDOW_CLIENTCOORDS )
Global moveableCanvas:TGadget = CreateCanvas( 116 , 281 , 64 , 64 , window:TGadget )
Global gameCanvas:TGadget = CreateCanvas( 200 , 23 , 800 , 600 , window:TGadget )

Repeat
	WaitEvent()
	Select EventID()
		Case EVENT_WINDOWCLOSE
			End
		Case EVENT_GADGETPAINT
			Select EventSource()
				Case gameCanvas
				
					SetGraphics CanvasGraphics( gameCanvas )
					Cls 
					Flip 

				Case moveableCanvas
					SetGraphics CanvasGraphics( moveableCanvas )
					Cls 					
					Flip 
					
			End Select 

	End Select
Forever



SebHoll(Posted 2010) [#2]
I've done some investigation, and it appears as though this is actually a D3D9 bug. If you use the D3D7 or OpenGL drivers, the bug doesn't exist.

Mark? Skid?


skidracer(Posted 2010) [#3]
The viewport size is not related to the current graphics object but the draw state of Max2D (singleton design). You therefore need to call SetViewPort at the beginning of a redraw block when managing multiple targets.


SebHoll(Posted 2010) [#4]
The viewport size is not related to the current graphics object but the draw state of Max2D (singleton design). You therefore need to call SetViewPort at the beginning of a redraw block when managing multiple targets.

I'm not sure that is the problem here, Skid... The following produces the same buggy results (but for DX9 driver only):

SuperStrict
Import MaxGui.Drivers

Global window:TGadget = CreateWindow:TGadget("Ed",60,60,1010,670,Null,WINDOW_TITLEBAR| WINDOW_CLIENTCOORDS )
Global moveableCanvas:TGadget = CreateCanvas( 116 , 281 , 64 , 64 , window:TGadget )
Global gameCanvas:TGadget = CreateCanvas( 200 , 23 , 800 , 600 , window:TGadget )

Repeat
	WaitEvent()
	Select EventID()
		Case EVENT_WINDOWCLOSE
			End
		Case EVENT_GADGETPAINT
			Select EventSource()
				Case gameCanvas
				
					SetGraphics CanvasGraphics( gameCanvas )
					SetViewport 0, 0, ClientWidth(gameCanvas), ClientHeight(gameCanvas)
					Cls 
					Flip 

				Case moveableCanvas
					SetGraphics CanvasGraphics( moveableCanvas )
					SetViewport 0, 0, ClientWidth(moveableCanvas), ClientHeight(moveableCanvas)
					Cls 					
					Flip 
					
			End Select 

	End Select
Forever



skidracer(Posted 2010) [#5]
Agreed.


marksibly(Posted 2010) [#6]
Hi,

Fix coming soon in 1.39 release.