On Nov 20, 2013, at 4:54 PM, Hilaire Fernandes <[email protected]> 
wrote:

> Hello,
> 
> In Pharo 2.0 (true in 1.4 as well), it looks PNG bitmap are wrongly
> rotated or scaled when they contain alpha transparency.
> 
> In the example bellow with the joined bitmap, the alpha gray color are
> rendered darker when the imagemorph is scaled or rotated.
> 
> Sqeak does not suffer this problem

hilaire may be you should have a look at the changes made in the graphics 
package
of squeak to identify the change.
We should have more tests.

Stef
> 
> 
> | dir morph transform form|
> dir := FileSystem disk workingDirectory parent.
> morph := (ImageReadWriter formFromFileNamed: (dir / 'bubble.png')
> fullName) asMorph.
> transform := TransformationMorph new asFlexOf: morph.
> transform smoothingOn ; angle: Float pi / 3; scale: 1.
> transform openInWorld
> 
> 
> Thanks
> 
> Hilaire
> 
> 
> -- 
> Dr. Geo http://drgeo.eu
> <bubble.png>


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