Change Image filtering/mipmap after creation?

BlitzMax Forums/BlitzMax Programming/Change Image filtering/mipmap after creation?

skn3	(Posted 2012) [#1]

Does anyone have any code for altering an images FILTEREDIMAGE and MIPMAPPEDIMAGE "properties" after the image has been created?

The scenario I have is that I have an image shared across multiple canveses. In some circumstance I want to draw the image without filtering/mipmap but in some circumstances I want to draw with!

I could keep two copies of the image but ID rather not! So does anyone know if this is possible?

I am using GL and DX (dependant on users system) but either would do...

Last edited 2012

BlitzSupport

(Posted 2012) [#2]

Pretty sure this has to be done at the point of creation, though I could be wrong, but I imagine the changed image has to be re-uploaded to the graphics card.

Best I could think of, and it's quite nasty, was this...


Graphics 640, 480

' Filtered...

Local image:TImage = LoadImage ("boing.png", MASKEDIMAGE | FILTEREDIMAGE)

Repeat

	Cls
	
	SetScale 4, 4
	
	DrawImage image, MouseX (), MouseY ()
	
	If MouseHit (1)

		' Unfiltered...
		image = LoadImage (LockImage (image), MASKEDIMAGE)
		UnlockImage image

	EndIf
	
	Flip
	
Until KeyHit (KEY_ESCAPE)

End

skn3	(Posted 2012) [#3]

Hey,

yeah I thought it might be as much. I guess I now need to ponder what I will do!

Thanks for the pointer!