Bug 131303

Summary: [GTK] canvas-composite-*-alpha.html tests failing since added
Product: WebKit Reporter: Sergio Villar Senin <svillar>
Component: CanvasAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: krit
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on: 79659    
Bug Blocks:    
Attachments:
Description Flags
Stroke compositing test
none
WebKitGTK stroke compositing test none

Sergio Villar Senin
Reported 2014-04-07 09:27:55 PDT
Both * fast/canvas/canvas-composite-stroke-alpha.html * fast/canvas/canvas-composite-text-alpha.html are failing on GTK bots since added.
Attachments
Stroke compositing test (12.17 KB, text/html)
2014-04-08 00:01 PDT, Dirk Schulze 		no flags
Details
WebKitGTK stroke compositing test (93.49 KB, image/png)
2014-04-08 00:22 PDT, Jae Hyun Park 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Dirk Schulze
Comment 1 2014-04-07 22:15:01 PDT
I can not build Cairo graphics port. In the past, beginTransparencyLayer created a new paint mask for GraphicsContextCairo. This was basically doing what CG does: creating a new layer that is composited with an alpha value afterwards. I wonder why this would not work anymore. Could you send screenshots of https://developer.mozilla.org/samples/canvas-tutorial/6_1_canvas_composite.html please?
Dirk Schulze
Comment 2 2014-04-08 00:01:13 PDT
Created attachment 228811 [details] Stroke compositing test Sorry, please upload an image for the attached test.
Jae Hyun Park
Comment 3 2014-04-08 00:22:40 PDT
Created attachment 228816 [details] WebKitGTK stroke compositing test This is the screenshot of stroke compositing test that ran on MiniBrowser of WebKitGTK+.
Dirk Schulze
Comment 4 2014-04-08 06:31:45 PDT
(In reply to comment #3) > Created an attachment (id=228816) [details] > WebKitGTK stroke compositing test > > This is the screenshot of stroke compositing test that ran on MiniBrowser of WebKitGTK+. It looks like destination-atop and source-out improved by the patch. Source-in and destination-in are incorrect. Since the other cases work, it seems more like a bug in Cairo graphics.
Dirk Schulze
Comment 5 2014-04-14 09:22:56 PDT
fixed by the dependent bug.
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