Bug 15265

Summary: Canvas shadows not rendered unless shadowBlur/OffsetX/OffsetY set
Product: WebKit Reporter: Philip Taylor <excors>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED INVALID    
Severity: Normal CC: kling
Priority: P2    
Version: 523.x (Safari 3)   
Hardware: PC   
OS: Windows Server 2003   
Attachments:
Description Flags
test case none

Philip Taylor
Reported 2007-09-23 14:53:26 PDT
When shadowColor is set to some colour and a shape is rendered, the shadow is not drawn iff shadowBlur = shadowOffsetX = shadowOffsetY = 0.
Attachments
test case (425 bytes, text/html)
2007-09-23 14:56 PDT, Philip Taylor 		no flags
Details
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Philip Taylor
Comment 1 2007-09-23 14:56:25 PDT
Created attachment 16363 [details] test case This should draw the shadow first, then draw the rectangle on top, with the XOR compositing resulting in a transparent canvas. If you set shadowBlur or shadowOffset{X,Y} before drawing the shadow, then it works as expected.
Eric Seidel (no email)
Comment 2 2008-09-30 20:30:58 PDT
What does the HTML5 spec say about this?
Andreas Kling
Comment 3 2010-08-21 05:39:12 PDT
Quoth HTML5: "Shadows are only drawn if the opacity component of the alpha component of the color of shadowColor is non-zero and either the shadowBlur is non-zero, or the shadowOffsetX is non-zero, or the shadowOffsetY is non-zero." http://www.whatwg.org/specs/web-apps/current-work/#shadows
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