Yay, it works.. if i use: canvas image: surface asForm at: bounds origin sourceRect: (0@0 extent: surface extent ) rule: 34. instead of canvas translucentImage: surface asForm at: bounds origin. hmm.. i just don't understand why: image: aForm at: aPoint sourceRect: sourceRect rule: rule "Note: The public use of this protocol is deprecated. It will become private. Nobody in the outside world must assume that a thing like a combination rule has any specific effect." why it is considered private? i wanna blend my form with another using specific rule, and this is the only protocol available for that.. weird. (Sorry for derailing topic, but that problem was quite annoying to me, i will take more deeper look at a fix later , and reply separately ;) ) On 22 November 2013 00:54, Igor Stasenko <siguctua@gmail.com> wrote:
On 21 November 2013 21:27, Hilaire Fernandes <hilaire.fernandes@gmail.com>wrote:
Le 21/11/2013 08:21, Stéphane Ducasse a écrit :
On Nov 20, 2013, at 4:54 PM, Hilaire Fernandes <
hilaire.fernandes@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.
-- Best regards, Igor Stasenko.
