Open
Bug 952558
Opened 12 years ago
Updated 3 years ago
drawImage changes color when not rounding number
Categories
(Core :: Graphics: Canvas2D, defect)
Tracking
()
UNCONFIRMED
People
(Reporter: meyer.ant, Unassigned)
Details
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36
Steps to reproduce:
Uses drawImage to draw a canvas to another canvas by translating slices of 1px with floating-point precision.
You can see the javascript here: http://jsfiddle.net/CW5hz/18/
Actual results:
The color of the content of the initial canvas is altered when drawn on the second canvas.
Expected results:
The shape should be translated without color change.
Notes:
mozImageSmoothingEnabled set to false does reduce the floating-point precision to integer but the color still changes.
The only way to have it keep its color is by forgetting about floating-point precision and Math.rounding dx in the snippet. (which we would like to avoid)
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Updated•12 years ago
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Component: Untriaged → Canvas: 2D
Product: Firefox → Core
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Comment 1•12 years ago
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IE9 on win7 and IE11 on Win8.1 have a same behavior as Firefox.
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Updated•3 years ago
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Severity: normal → S3
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Description
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