Closed
Bug 879169
Opened 12 years ago
Closed 3 years ago
[Azure] Combination of low context.shadowBlur and context.shadowColor with a low alpha value produces a fully opaque shadow. when HWA Enabled
Categories
(Core :: Graphics: Canvas2D, defect)
Tracking
()
RESOLVED
INVALID
People
(Reporter: smaren, Assigned: bas.schouten)
References
()
Details
(Keywords: testcase)
Attachments
(1 file)
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2.11 KB,
image/png
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Details |
firefox bug.png
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36
Steps to reproduce:
Create an element with a shadow with low blur and alpha on shadow color.
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.shadowBlur= 0.5;
ctx.shadowOffsetY = 20;
ctx.fillStyle="red";
ctx.shadowColor="rgba(0, 0, 0, 0.5)";
ctx.fillRect(20,20,100,80);
So far, only found the bug in windows 7.
Actual results:
The shadow looks fully opaque black
Expected results:
The shadow should have been transparent black.
Summary: Low combination of context.shadowBlur and context.shadowColor with a low alpha value produces a fully opaque shadow. → Combination of low context.shadowBlur and context.shadowColor with a low alpha value produces a fully opaque shadow.
Could you attach a testcase (html file), please.
Flags: needinfo?(smaren)
Keywords: testcase-wanted
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Comment 2•12 years ago
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gfx.canvas.azure.backends;skia = cairo helps
Component: Untriaged → Canvas: 2D
Keywords: testcase-wanted → testcase
Product: Firefox → Core
Summary: Combination of low context.shadowBlur and context.shadowColor with a low alpha value produces a fully opaque shadow. → [Azure] Combination of low context.shadowBlur and context.shadowColor with a low alpha value produces a fully opaque shadow. when HWA Enabled
Version: 21 Branch → 7 Branch
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Updated•12 years ago
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Status: UNCONFIRMED → NEW
Ever confirmed: true
gfx.canvas.azure.backends = skia or cairo works. Only seems to malfunction when using direct2d
Flags: needinfo?(smaren)
Assignee: nobody → bas
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Assignee | |
Updated•3 years ago
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Status: NEW → RESOLVED
Closed: 3 years ago
Resolution: --- → INVALID
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Description
•