Graphics w/Transparent Backgrounds

[Gnome]

:roll: I'm a complete newbie and am trying to learn PureBasic. I've searched the forums but cannot find an answer (much less a simple one) that will tell me how to do the following ... please help:

I'm using the "Image Gadget" in the Visual Designer to get a graphic. If the image done in Photoshop has a transparent background, why wouldn't it in in designer?

What do I need to get rid of any background colors on images?

Many thanks to all in this great forum!
Kevin.

[netmaestro]

Hello, Gnome:

If you use a .png image or a .tiff image, alpha transparency will be displayed correctly when you use the command DrawAlphaImage() to display the graphic. You will have to use the appropriate decoder as well:

Code: Select all

UsePNGImageDecoder()
CatchImage(0, ?pic)
OpenWindow(0,0,0,320,240,#PB_Window_SystemMenu,"My Window")
StartDrawing(WindowOutput(0))
  DrawAlphaImage(ImageID(0),0,0)
StopDrawing()
Repeat
  EventID=WaitWindowEvent(1)
Until EventID=#PB_Event_CloseWindow

DataSection
  pic: IncludeBinary "MyImage.png"
EndDataSection

afaik the ImageGadget doesn't manage alpha transparency for now (I think)

[Gnome]

Thank you for your fantastic help ... I shall try it out as soon as possible!

May I ask what you mean by 'alpha transparency?'

And, say I use a .TIF or .PNG image ... what do I do with these graphics? (i.e., make a clipping path?, remove the background in Photoshop so that it's transparent?, save it any particular way?)

Thank you again for your most appreciated help!

Regards,
Kevin.

[Straker]

May I ask what you mean by 'alpha transparency?'

http://en.wikipedia.org/wiki/Alpha_transparency

remove the background in Photoshop so that it's transparent?, save it any particular way?

Yes

[Gnome]

I'm humbled by the great support that everyone provides within this forum. Thank you!

[garretthylltun]

What about for toolbar images and image buttons?

-Garrett

[Trond]

For those use 32-bit icons.

[Inf0Byt3]

You can allways use transparent background icons to make them look professiional .