<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>269544</bug_id>
          
          <creation_ts>2024-02-15 21:24:31 -0800</creation_ts>
          <short_desc>imageBitmaps generated from OffscreenCanvas are corrupt if the ImageBitmap has already been requested since the last redraw.</short_desc>
          <delta_ts>2024-03-03 17:33:30 -0800</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Canvas</component>
          <version>Safari 17</version>
          <rep_platform>Mac (Apple Silicon)</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>NEW</bug_status>
          <resolution></resolution>
          
          <see_also>https://bugs.webkit.org/show_bug.cgi?id=269704</see_also>
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Patrick Martin">patrick.martin.r</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>dino</cc>
    
    <cc>heycam</cc>
    
    <cc>karlcow</cc>
    
    <cc>mattwoodrow</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>2014310</commentid>
    <comment_count>0</comment_count>
    <who name="Patrick Martin">patrick.martin.r</who>
    <bug_when>2024-02-15 21:24:31 -0800</bug_when>
    <thetext>Example:
https://jsfiddle.net/ILOVEPIE/eupt4L1y/12/

The image should not flicker. The reason it is is that requesting an ImageBitmap results in an incorrect result if it&apos;s not the first request of an ImageBitmap from an OffscreenCanvas since the canvas was last redrawed.

This is a sister bug of firefox bug 1880591 and chrome bug 324758698.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2016293</commentid>
    <comment_count>1</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2024-02-22 21:25:14 -0800</bug_when>
    <thetext>&lt;rdar://problem/123488456&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2018302</commentid>
    <comment_count>2</comment_count>
    <who name="Karl Dubost">karlcow</who>
    <bug_when>2024-03-03 17:33:30 -0800</bug_when>
    <thetext>Currently this is flickering in all 3 browsers. 
https://bugzilla.mozilla.org/show_bug.cgi?id=1880591
https://issues.chromium.org/issues/324758698

The chromium issue has more context.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>