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Re: canvas; draw vector then restore overwritten area later

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From Denis McMahon <denismfmcmahon@gmail.com>
Newsgroups comp.lang.javascript
Subject Re: canvas; draw vector then restore overwritten area later
Date Sat, 31 Jan 2015 20:09:34 +0000 (UTC)
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On Sat, 31 Jan 2015 11:19:12 -0800, catebekensail wrote:

> This is the question.  If the user now click
> HEADLIGHTS can I some how restore the TIRE area to normal (redraw the
> original image pixels under the circle) without an entire repaint?

Use a transparent canvas element layered over an image (or another 
canvas).

-- 
Denis McMahon, denismfmcmahon@gmail.com

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canvas; draw vector then restore overwritten area later catebekensail@yahoo.com - 2015-01-31 11:19 -0800
  Re: canvas; draw vector then restore overwritten area later "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-01-31 20:36 +0100
  Re: canvas; draw vector then restore overwritten area later Denis McMahon <denismfmcmahon@gmail.com> - 2015-01-31 20:09 +0000
  Re: canvas; draw vector then restore overwritten area later Dr J R Stockton <reply1500@merlyn.demon.co.uk.invalid> - 2015-02-01 20:08 +0000
    Re: canvas; draw vector then restore overwritten area later Mike Duffy <md_004@videotron.ca> - 2015-02-04 00:58 -0500
      Re: canvas; draw vector then restore overwritten area later Dr J R Stockton <reply1500@merlyn.demon.co.uk.invalid> - 2015-02-05 23:16 +0000
        Re: canvas; draw vector then restore overwritten area later Mike Duffy <md_004@videotron.ca> - 2015-02-05 20:34 -0500
        Re: canvas; draw vector then restore overwritten area later "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-02-05 20:32 -0800
          Re: canvas; draw vector then restore overwritten area later Mike Duffy <md_004@videotron.ca> - 2015-02-06 00:28 -0500
  Re: canvas; draw vector then restore overwritten area later "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2015-02-01 18:58 -0800

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