On 21 November 2013 21:27, Hilaire Fernandes <hilaire.fernan...@gmail.com>wrote:
> Le 21/11/2013 08:21, Stéphane Ducasse a écrit : > > > > On Nov 20, 2013, at 4:54 PM, Hilaire Fernandes < > hilaire.fernan...@gmail.com> 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 > > I took at look on the list, did not find anything yet > > not directly, right. But since symptoms are similar, i think this is most probably the same case. (and your digging shown that we actually having separate rule for premultiplied alpha blend, which i could use for correctly transferring/blending cairo surface pixels in Forms) > Hilaire > > > 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> > > > > > > > > > -- > Dr. Geo http://drgeo.eu > > > -- Best regards, Igor Stasenko.
