bug#52120: closed (29.0.50; XRender image transforms many magnitudes faster than Cairo image transforms)

[GNU bug Tracking System]

Your message dated Wed, 19 Jan 2022 17:42:24 +0800
with message-id <87bl083vun.fsf@yahoo.com>
and subject line Bug fixed
has caused the debbugs.gnu.org bug report #52120,
regarding 29.0.50; XRender image transforms many magnitudes faster than Cairo 
image transforms
to be marked as done.

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-- 
52120: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=52120
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> --- Begin Message ---
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> Subject: 
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> 29.0.50; XRender image transforms many magnitudes faster than Cairo image transforms
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> Date: 
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> Fri, 26 Nov 2021 16:06:46 +0800
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>
>
> Try to pixel-scroll (using better-pixel-scroll-mode', soon to be
> pixel-scroll-precise-mode) through an image with transforms (you can see
> such an example by using eww to browse to gnu.org).
>
> On a build without Cairo, which uses the X rendering extension to
> achieve hardware acceleration of image scaling, everything is perfectly
> smooth.  On a build with Cairo, it takes around second to scroll through
> one or two pixels of such an image.
>
> If nobody else knows why this is the case, I plan to look into it in a
> few days, as this is within my field of expertise.  Thanks.
>
> In GNU Emacs 29.0.50 (build 318, x86_64-pc-linux-gnu, GTK+ Version 3.24.30)
>  of 2021-11-26 built on trinity
> Repository revision: 4e9f78d2a4c5608eeb056b5ecd159b6ea251372e
> Repository branch: master
> Windowing system distributor 'The X.Org Foundation', version 11.0.12101003
> System Description: Fedora Linux 35 (Workstation Edition)
>
> Configured using:
>  'configure --without-cairo --with-xinput2 --cache-file=/tmp/ccache'
>
> Configured features:
> ACL DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON LCMS2
> LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG RSVG
> SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XFT XIM
> XINPUT2 XPM GTK3 ZLIB
>
>
>
> --- End Message ---
> --- Begin Message ---
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> Subject: 
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> Bug fixed
>
>
>
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> Date: 
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> Wed, 19 Jan 2022 17:42:24 +0800
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> Should be fixed in de614ec950.
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>
> --- End Message ---