WebKit Bugzilla
New
Browse
Log In
×
Sign in with GitHub
or
Remember my login
Create Account
·
Forgot Password
Forgotten password account recovery
RESOLVED FIXED
26037
[Skia] Canvas globalAlpha property not applied to drawImage method
https://bugs.webkit.org/show_bug.cgi?id=26037
Summary
[Skia] Canvas globalAlpha property not applied to drawImage method
Anand K. Mistry
Reported
2009-05-26 23:13:18 PDT
Setting the globalImage property of a canvas context is not honoured when doing a drawImage. Test case available at:
http://philip.html5.org/tests/canvas/suite/tests/2d.composite.globalAlpha.image.html
Chromium bug
http://code.google.com/p/chromium/issues/detail?id=5281
Tested on: Firefox 3.0 Linux - PASS Firefox 3.5b4 OSX - PASS WebKit nightly OSX (44174) - PASS Chromium SVN (16864) - FAIL
Attachments
Use the alpha channel when painting images in skia.
(28.59 KB, patch)
2009-06-02 20:32 PDT
,
Anand K. Mistry
dglazkov
: review-
Details
Formatted Diff
Diff
Use the alpha channel when painting images in skia. Updated.
(28.59 KB, patch)
2009-06-03 16:04 PDT
,
Anand K. Mistry
dglazkov
: review+
Details
Formatted Diff
Diff
Show Obsolete
(1)
View All
Add attachment
proposed patch, testcase, etc.
Dirk Schulze
Comment 1
2009-05-30 09:55:22 PDT
We fixexd it on Cairo by reading and applying the globalAlpha in WebCore/platform/graphics/cairo/ImageCairo.cpp directly. We added getAlpha() for Cairo to GraphicsContext.h maybe Skia needs to use it too.
Anand K. Mistry
Comment 2
2009-06-02 20:32:02 PDT
Created
attachment 30889
[details]
Use the alpha channel when painting images in skia.
Anand K. Mistry
Comment 3
2009-06-02 20:36:19 PDT
The patch is by me. Please ignore the gmail address.
Dimitri Glazkov (Google)
Comment 4
2009-06-03 10:37:06 PDT
Comment on
attachment 30889
[details]
Use the alpha channel when painting images in skia.
> + int alpha = roundf(platformContext->getAlpha() * 256); > + if (alpha > 255) > + alpha = 255; > + else if (alpha < 0) > + alpha = 0; > + paint.setAlpha(alpha);
4 spaces indent. Looks great otherwise.
Anand K. Mistry
Comment 5
2009-06-03 16:04:54 PDT
Created
attachment 30929
[details]
Use the alpha channel when painting images in skia. Updated. Changes: Changed to 4 space indent.
Dimitri Glazkov (Google)
Comment 6
2009-06-03 16:12:46 PDT
Comment on
attachment 30929
[details]
Use the alpha channel when painting images in skia. Updated. Don't forget to mark for review next time :)
Dimitri Glazkov (Google)
Comment 7
2009-06-09 10:09:26 PDT
Landed as
http://trac.webkit.org/changeset/44537
.
Note
You need to
log in
before you can comment on or make changes to this bug.
Top of Page
Format For Printing
XML
Clone This Bug