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color: put alpha mode into a request of its own

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Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This commit is contained in:
Pekka Paalanen 2020-10-20 16:06:26 +03:00 • committed by Sebastian Wick
parent b2c3dc8291
commit 2048caaee6
1 changed files with 18 additions and 9 deletions
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27
unstable/color-management/color-management-unstable-v1.xml
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@ -331,6 +331,20 @@
<entry name="premultiplied" value="1" summary="alpha is pre-multiplied into color channels"/>
</enum>
<request name="set_alpha_mode">
<description summary="set the surface alpha mode">
Assuming an alpha channel exists, it is always linear. The alpha mode
determines whether the color channels include alpha pre-multiplied or
not. Using straight alpha might have performance benefits.
Alpha mode is double buffered, and will be applied at the time
wl_surface.commit of the corresponding wl_surface is called.
By default, a surface is assumed to have pre-multiplied alpha.
</description>
<arg name="alpha_mode" type="uint" enum="alpha_mode" summary="alpha mode"/>
</request>
<request name="set_extended_dynamic_range">
<description summary="set the content extended dynamic range">
Set the extended dynamic range (EDR) value for the underlying surface.
@ -372,20 +386,16 @@
<request name="set_color_space">
<description summary="set the surface color space">
Set the color space of the underlying surface. The color space,
render intent and alpha mode are double buffered, and will be applied
Set the color space of the underlying surface. The color space and
render intent are double buffered, and will be applied
at the time wl_surface.commit of the corresponding wl_surface is called.
<!-- FIXME: same problem as in the render_intent enum -->
The render intent gives the compositor a hint what to optimize for in
color space transformations.
The alpha channel is always linear. The alpha mode determines whether
the color channels include alpha pre-multiplied or not. Using straight
alpha might have performance benefits.
By default, a surface is assumed to have the sRGB color space, an
arbitrary render intent, and pre-multiplied alpha.
By default, a surface is assumed to have the sRGB color space and an
arbitrary render intent.
If the color space of the surface matches the color space of an output
it is shown on the performance and color accuracy might improve. To find
@ -396,7 +406,6 @@
</description>
<arg name="color_space" type="object" interface="zwp_color_space_v1"/>
<arg name="render_intent" type="uint" enum="render_intent" summary="render intent"/>
<arg name="alpha_mode" type="uint" enum="alpha_mode" summary="alpha mode"/>
</request>
<request name="set_default_color_space">