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Draft: protocol: add scale120 event to the wl_output

See merge request wayland/wayland!328
This commit is contained in:
Volodymyr Zolotopupov 2025-09-19 06:33:35 +00:00
commit 4b96988ec2
1 changed files with 33 additions and 1 deletions
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34
protocol/wayland.xml
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@ -2760,7 +2760,7 @@
</event>
</interface>
<interface name="wl_output" version="4">
<interface name="wl_output" version="5">
<description summary="compositor output region">
An output describes part of the compositor geometry. The
compositor works in the 'compositor coordinate system' and an
@ -3000,6 +3000,38 @@
</description>
<arg name="description" type="string" summary="output description"/>
</event>
<!-- Version 5 additions -->
<event name="scale120" since="5">
<description summary="floating point scaling output properties">
This event contains scaling geometry information
specific to a scale factor of 120 fractions (v120 scale).
It may be sent after binding the output object or if the
output scale changes later. If it is not sent,
the client should rely on the fixed point scale.
A scale larger than 120 means that the compositor will
automatically scale surface buffers by (scale_120 / 120.0)
when rendering. This is used for very high resolution
displays where applications rendering at the native
resolution would be too small to be legible.
Compositor with version 5 support must send both fixed scale
and v120 scale values. If the v120 scale has not been sent,
the client must use a fixed point scale value.
To ensure proper handling of v120 scale, scaling-aware
clients can utilize the "viewporter" protocol.
By setting the appropriate viewport and scaling
properties using the viewporter protocol,
clients can provide a higher-detail image
that matches the v120 scale of the output.
The scale_120 event will be followed by a done event.
</description>
<arg name="factor120" type="int" summary="scaling factor of the output as a fraction of 120"/>
</event>
</interface>
<interface name="wl_region" version="1">