[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94246

            Bug ID: 94246
           Summary: Text shadow is rendered incorrectly on Radeon R7 260X
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: smikkelsendk@gmail.com

Created attachment 121882
  --> https://bugs.freedesktop.org/attachment.cgi?id=121882&action=edit
Log from Xorg with default options

I noticed some texts were looking blurry depending on my MATE Desktop theme and
filed a bug report to MATE team
(https://github.com/mate-desktop/mate-themes/issues/104). We discovered that
the problem is that my GFX card renders text shadows incorrectly.

Adding this option fixes the problem:
    Option "ShadowPrimary" "true"
This has a side effect of disabling pageflipping. However just disabling
pageflipping alone does not fix the problem.

Also if I turn off acceleration completely with:
        Option "Accel" "false"

The problem also is fixed.

Attached: Screenshot and XOrg log of when the problem appears (default options)
and when it is fixed (enabling ShadowPrimary)

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94246

--- Comment #1 from Steffen <smikkelsendk@gmail.com> ---
Created attachment 121883
  --> https://bugs.freedesktop.org/attachment.cgi?id=121883&action=edit
Log from Xorg with ShadowPrimary enabled

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94246

--- Comment #2 from Steffen <smikkelsendk@gmail.com> ---
Created attachment 121884
  --> https://bugs.freedesktop.org/attachment.cgi?id=121884&action=edit
Screenshot with ShadowPrimary enabled

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 314 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=94246

--- Comment #3 from Steffen <smikkelsendk@gmail.com> ---
Created attachment 121885
  --> https://bugs.freedesktop.org/attachment.cgi?id=121885&action=edit
Screenshot with default options

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 314 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=94246

--- Comment #4 from Steffen <smikkelsendk@gmail.com> ---
Created attachment 121886
  --> https://bugs.freedesktop.org/attachment.cgi?id=121886&action=edit
Screenshot with default options

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 444 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=94246

--- Comment #5 from Steffen <smikkelsendk@gmail.com> ---
Created attachment 121887
  --> https://bugs.freedesktop.org/attachment.cgi?id=121887&action=edit
Screenshot showing how text shadow is rendered differently depending on options

I messed up the previous screenshot attachments, please look at this one
instead

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94246

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #121884|0                           |1
        is obsolete|                            |

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 405 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=94246

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #121885|0                           |1
        is obsolete|                            |

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 405 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=94246

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #121886|0                           |1
        is obsolete|                            |

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[Bug 94246] Text shadow is rendered incorrectly on Radeon R7 260X

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=94246

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|dri-devel@lists.freedesktop |xorg-team@lists.x.org
                   |.org                        |
            Product|DRI                         |xorg
          Component|DRM/Radeon                  |Driver/glamor
            Version|XOrg git                    |git
         QA Contact|                            |xorg-team@lists.x.org

--- Comment #6 from Michel Dänzer <michel@daenzer.net> ---
This is a glamor issue, proposed fix at
https://patchwork.freedesktop.org/patch/74719/ .

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