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graesslin added a comment.


  In https://phabricator.kde.org/D6952#129679, @davidedmundson wrote:
  
  > Seems ok, but I'm lost as to why Xwayland clients have a different buffer size in the first place.
  
  
  It is due to the reparenting of the window to support window decorations. The actual window becomes larger. You can find similar adjustments in the code building the vertices for OpenGL.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D6952

To: graesslin, #kwin, #plasma, davidedmundson
Cc: davidedmundson, plasma-devel, kwin, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart, lukas

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<table><tr><td style=3D"">graesslin added a comment.
</td><a style=3D"text-decoration: none; padding: 4px 8px; margin: 0 8px 8px=
; float: right; color: #464C5C; font-weight: bold; border-radius: 3px; back=
ground-color: #F7F7F9; background-image: linear-gradient(to bottom,#fff,#f1=
f0f1); display: inline-block; border: 1px solid rgba(71,87,120,.2);" href=
=3D"https://phabricator.kde.org/D6952" rel=3D"noreferrer">View Revision</a>=
</tr></table><br /><div><div><blockquote style=3D"border-left: 3px solid #8=
C98B8;
          color: #6B748C;
          font-style: italic;
          margin: 4px 0 12px 0;
          padding: 8px 12px;
          background-color: #F8F9FC;">
<div style=3D"font-style: normal;
          padding-bottom: 4px;">In <a href=3D"https://phabricator.kde.org/D=
6952#129679" style=3D"background-color: #e7e7e7;
          border-color: #e7e7e7;
          border-radius: 3px;
          padding: 0 4px;
          font-weight: bold;
          color: black;text-decoration: none;" rel=3D"noreferrer">D6952#129=
679</a>, <a href=3D"https://phabricator.kde.org/p/davidedmundson/" style=3D"
              border-color: #f1f7ff;
              color: #19558d;
              background-color: #f1f7ff;
                border: 1px solid transparent;
                border-radius: 3px;
                font-weight: bold;
                padding: 0 4px;" rel=3D"noreferrer">@davidedmundson</a> wro=
te:</div>
<div style=3D"margin: 0;
          padding: 0;
          border: 0;
          color: rgb(107, 116, 140);"><p>Seems ok, but I&#039;m lost as to =
why Xwayland clients have a different buffer size in the first place.</p></=
div>
</blockquote>

<p>It is due to the reparenting of the window to support window decorations=
. The actual window becomes larger. You can find similar adjustments in the=
 code building the vertices for OpenGL.</p></div></div><br /><div><strong>R=
EPOSITORY</strong><div><div>R108 KWin</div></div></div><br /><div><strong>R=
EVISION DETAIL</strong><div><a href=3D"https://phabricator.kde.org/D6952" r=
el=3D"noreferrer">https://phabricator.kde.org/D6952</a></div></div><br /><d=
iv><strong>To: </strong>graesslin, KWin, Plasma, davidedmundson<br /><stron=
g>Cc: </strong>davidedmundson, plasma-devel, kwin, ZrenBot, progwolff, lesl=
iezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart, lukas<br />=
</div>
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