Bitmap Value Lost?

[fjsantos]

Hi all.

I finally buy this wonderfull app.
Now i have more doubts than ever!

I have problems using imagelib library.
The problem is the following, when i create a bitmap with backdrop image, I create a drawer and paint a bit image over previous, using drawer.drawimage1
When I first time, try to draw in a gamewindow.drawbackgroundimage2, all seems to be correct, but the second time, value doesn't work.
I have to use an intermediate image for storing value of backdropbitmap and reassign every time.

The code is follow.

Sub UpdateForm(x, y)
	CellBitmap.New1(AppPath & "\images\cell.png")
	'BackdropBitmap.New3(TmpBackdropBitmap.Value)
	CellRectangle.New1(0, 0, CellBitmap.Width, CellBitmap.Height)
	BackdropRectangle.New1(x, y, CellBitmap.Width, CellBitmap.Height)
	GameFormDrawer.New2(BackdropBitmap.Value, B4PObject(5))
	GameFormDrawer.DrawImage1(CellBitmap.Value, CellRectangle.Value, BackdropRectangle.Value, false)
	GameFormDrawer.Refresh2(BackdropRectangle.Value)
	'TmpBackdropBitmap.New3(BackdropBitmap.Value)
	GameGameWindow.DrawBackgroundImage2(BackdropBitmap.Value)
End Sub

This methods seems to work, but i wonder why i have to create new BackdropBitmap referencing to previous (TmpBackdropBitmap).

I commented 2 lines needed to work, and i wonder why I need this 2 lines.

Any Clues?

Thanks in advance.

fjsantos.

[klaus]

Could you post your whole code, it would be easyer to look what happens, the kind of objects and their context.

What function is this:
GameGameWindow.DrawBackgroundImage2(BackdropBitmap .Value)
I don't know this one.

Best regards

[fjsantos]

Hi Klaus

Thanks for helping.

Code is a bit large so I extract important part.

Sub App_Start
	GameFormLib.New1("GameForm", B4PObject(1))
	GameGameWindow.New1("GameForm", 0, 0, WIDTH, HEIGHT)
	GameGameWindow.DrawBackgroundImage(AppPath & "\images\backdrop.png")
	ObjectDoor.New1(False)
	ObjectDoor.FromControl("GameForm")
	ObjectDoor.SetProperty("KeyPreview", True)
	TmpBackdropBitmap.New1(AppPath & "\images\backdrop.png")
	GameForm.Image = TmpBackdropBitmap.Value
	GameForm.Show
	GameForm.ForeLayer = True
	CreateCloseButton
	CreateNewCell
	UpdateForm1
	MoveCellTimer.Enabled = True
End Sub

Sub UpdateForm1
	CellBitmap.New1(AppPath & "\images\cell.png")
	CellRectangle.New1(0, 0, CellBitmap.Width, CellBitmap.Height)
	BackdropRectangle.New1(0, 0, CellBitmap.Width, CellBitmap.Height)
	GameFormDrawer.New1("GameForm", True)
End Sub

Sub UpdateForm(x, y)
	BackdropRectangle.X = x
	BackdropRectangle.Y = y
	GameFormDrawer.DrawImage1(CellBitmap.Value, CellRectangle.Value, BackdropRectangle.Value, False)
	GameFormDrawer.Refresh2(BackdropRectangle.Value)
	GameGameWindow.DrawBackgroundImage2(GameForm.Image)
End Sub

The first time GameGameWindow draws GameForm.Image all seems to be ok, but the second one, its fails 'Parameter is not valid'.

Thanks, fjsantos.

[Erel]

Can you zip and upload your complete project?
There may be an issue here with how images are stored internally.

[fjsantos]

Of course I can.

Here it go.

Best Regards, fjsantos.

[klaus]

Erel is of course more competent to solve your problem than myself. I have never used the Sprite library.

Best regards

[Erel]

This is the same problem as this one: fullscreen problem
DrawBackgroundImage2 disposes the image after drawing it on the GameWindow.

The solution is to create a new copy of the image (with a Bitmap object) and then pass it.
It will be fixed in the next update of the Sprite library.

BTW, why are you setting ForeLayer to true? It is hidden by the GameWindow.
There is a problem with the designer code in your source file.
You can use the attached file instead.

[fjsantos]

Hi all.

Yep i suppose that image was disposing after drawimage. The code was only a draft playing around with forms and gamewindows (I have to learn a lot yet!).

Thanks a lot for improve the code!!

Klaus thanks to you too for your interest and help!!

Best Regards, fjsantos.