204 lines
9.0 KiB
XML
204 lines
9.0 KiB
XML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<protocol name="wlr_export_dmabuf_unstable_v1">
|
||
|
|
<copyright>
|
||
|
|
Copyright © 2018 Rostislav Pehlivanov
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a
|
||
|
|
copy of this software and associated documentation files (the "Software"),
|
||
|
|
to deal in the Software without restriction, including without limitation
|
||
|
|
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||
|
|
and/or sell copies of the Software, and to permit persons to whom the
|
||
|
|
Software is furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice (including the next
|
||
|
|
paragraph) shall be included in all copies or substantial portions of the
|
||
|
|
Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||
|
|
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||
|
|
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||
|
|
DEALINGS IN THE SOFTWARE.
|
||
|
|
</copyright>
|
||
|
|
|
||
|
|
<description summary="a protocol for low overhead screen content capturing">
|
||
|
|
An interface to capture surfaces in an efficient way by exporting DMA-BUFs.
|
||
|
|
|
||
|
|
Warning! The protocol described in this file is experimental and
|
||
|
|
backward incompatible changes may be made. Backward compatible changes
|
||
|
|
may be added together with the corresponding interface version bump.
|
||
|
|
Backward incompatible changes are done by bumping the version number in
|
||
|
|
the protocol and interface names and resetting the interface version.
|
||
|
|
Once the protocol is to be declared stable, the 'z' prefix and the
|
||
|
|
version number in the protocol and interface names are removed and the
|
||
|
|
interface version number is reset.
|
||
|
|
</description>
|
||
|
|
|
||
|
|
<interface name="zwlr_export_dmabuf_manager_v1" version="1">
|
||
|
|
<description summary="manager to inform clients and begin capturing">
|
||
|
|
This object is a manager with which to start capturing from sources.
|
||
|
|
</description>
|
||
|
|
|
||
|
|
<request name="capture_output">
|
||
|
|
<description summary="capture a frame from an output">
|
||
|
|
Capture the next frame of a an entire output.
|
||
|
|
</description>
|
||
|
|
<arg name="frame" type="new_id" interface="zwlr_export_dmabuf_frame_v1"/>
|
||
|
|
<arg name="overlay_cursor" type="int"
|
||
|
|
summary="include custom client hardware cursor on top of the frame"/>
|
||
|
|
<arg name="output" type="object" interface="wl_output"/>
|
||
|
|
</request>
|
||
|
|
|
||
|
|
<request name="destroy" type="destructor">
|
||
|
|
<description summary="destroy the manager">
|
||
|
|
All objects created by the manager will still remain valid, until their
|
||
|
|
appropriate destroy request has been called.
|
||
|
|
</description>
|
||
|
|
</request>
|
||
|
|
</interface>
|
||
|
|
|
||
|
|
<interface name="zwlr_export_dmabuf_frame_v1" version="1">
|
||
|
|
<description summary="a DMA-BUF frame">
|
||
|
|
This object represents a single DMA-BUF frame.
|
||
|
|
|
||
|
|
If the capture is successful, the compositor will first send a "frame"
|
||
|
|
event, followed by one or several "object". When the frame is available
|
||
|
|
for readout, the "ready" event is sent.
|
||
|
|
|
||
|
|
If the capture failed, the "cancel" event is sent. This can happen anytime
|
||
|
|
before the "ready" event.
|
||
|
|
|
||
|
|
Once either a "ready" or a "cancel" event is received, the client should
|
||
|
|
destroy the frame. Once an "object" event is received, the client is
|
||
|
|
responsible for closing the associated file descriptor.
|
||
|
|
|
||
|
|
All frames are read-only and may not be written into or altered.
|
||
|
|
</description>
|
||
|
|
|
||
|
|
<enum name="flags">
|
||
|
|
<description summary="frame flags">
|
||
|
|
Special flags that should be respected by the client.
|
||
|
|
</description>
|
||
|
|
<entry name="transient" value="0x1"
|
||
|
|
summary="clients should copy frame before processing"/>
|
||
|
|
</enum>
|
||
|
|
|
||
|
|
<event name="frame">
|
||
|
|
<description summary="a frame description">
|
||
|
|
Main event supplying the client with information about the frame. If the
|
||
|
|
capture didn't fail, this event is always emitted first before any other
|
||
|
|
events.
|
||
|
|
|
||
|
|
This event is followed by a number of "object" as specified by the
|
||
|
|
"num_objects" argument.
|
||
|
|
</description>
|
||
|
|
<arg name="width" type="uint"
|
||
|
|
summary="frame width in pixels"/>
|
||
|
|
<arg name="height" type="uint"
|
||
|
|
summary="frame height in pixels"/>
|
||
|
|
<arg name="offset_x" type="uint"
|
||
|
|
summary="crop offset for the x axis"/>
|
||
|
|
<arg name="offset_y" type="uint"
|
||
|
|
summary="crop offset for the y axis"/>
|
||
|
|
<arg name="buffer_flags" type="uint"
|
||
|
|
summary="flags which indicate properties (invert, interlacing),
|
||
|
|
has the same values as zwp_linux_buffer_params_v1:flags"/>
|
||
|
|
<arg name="flags" type="uint" enum="flags"
|
||
|
|
summary="indicates special frame features"/>
|
||
|
|
<arg name="format" type="uint"
|
||
|
|
summary="format of the frame (DRM_FORMAT_*)"/>
|
||
|
|
<arg name="mod_high" type="uint"
|
||
|
|
summary="drm format modifier, high"/>
|
||
|
|
<arg name="mod_low" type="uint"
|
||
|
|
summary="drm format modifier, low"/>
|
||
|
|
<arg name="num_objects" type="uint"
|
||
|
|
summary="indicates how many objects (FDs) the frame has (max 4)"/>
|
||
|
|
</event>
|
||
|
|
|
||
|
|
<event name="object">
|
||
|
|
<description summary="an object description">
|
||
|
|
Event which serves to supply the client with the file descriptors
|
||
|
|
containing the data for each object.
|
||
|
|
|
||
|
|
After receiving this event, the client must always close the file
|
||
|
|
descriptor as soon as they're done with it and even if the frame fails.
|
||
|
|
</description>
|
||
|
|
<arg name="index" type="uint"
|
||
|
|
summary="index of the current object"/>
|
||
|
|
<arg name="fd" type="fd"
|
||
|
|
summary="fd of the current object"/>
|
||
|
|
<arg name="size" type="uint"
|
||
|
|
summary="size in bytes for the current object"/>
|
||
|
|
<arg name="offset" type="uint"
|
||
|
|
summary="starting point for the data in the object's fd"/>
|
||
|
|
<arg name="stride" type="uint"
|
||
|
|
summary="line size in bytes"/>
|
||
|
|
<arg name="plane_index" type="uint"
|
||
|
|
summary="index of the the plane the data in the object applies to"/>
|
||
|
|
</event>
|
||
|
|
|
||
|
|
<event name="ready">
|
||
|
|
<description summary="indicates frame is available for reading">
|
||
|
|
This event is sent as soon as the frame is presented, indicating it is
|
||
|
|
available for reading. This event includes the time at which
|
||
|
|
presentation happened at.
|
||
|
|
|
||
|
|
The timestamp is expressed as tv_sec_hi, tv_sec_lo, tv_nsec triples,
|
||
|
|
each component being an unsigned 32-bit value. Whole seconds are in
|
||
|
|
tv_sec which is a 64-bit value combined from tv_sec_hi and tv_sec_lo,
|
||
|
|
and the additional fractional part in tv_nsec as nanoseconds. Hence,
|
||
|
|
for valid timestamps tv_nsec must be in [0, 999999999]. The seconds part
|
||
|
|
may have an arbitrary offset at start.
|
||
|
|
|
||
|
|
After receiving this event, the client should destroy this object.
|
||
|
|
</description>
|
||
|
|
<arg name="tv_sec_hi" type="uint"
|
||
|
|
summary="high 32 bits of the seconds part of the timestamp"/>
|
||
|
|
<arg name="tv_sec_lo" type="uint"
|
||
|
|
summary="low 32 bits of the seconds part of the timestamp"/>
|
||
|
|
<arg name="tv_nsec" type="uint"
|
||
|
|
summary="nanoseconds part of the timestamp"/>
|
||
|
|
</event>
|
||
|
|
|
||
|
|
<enum name="cancel_reason">
|
||
|
|
<description summary="cancel reason">
|
||
|
|
Indicates reason for cancelling the frame.
|
||
|
|
</description>
|
||
|
|
<entry name="temporary" value="0"
|
||
|
|
summary="temporary error, source will produce more frames"/>
|
||
|
|
<entry name="permanent" value="1"
|
||
|
|
summary="fatal error, source will not produce frames"/>
|
||
|
|
<entry name="resizing" value="2"
|
||
|
|
summary="temporary error, source will produce more frames"/>
|
||
|
|
</enum>
|
||
|
|
|
||
|
|
<event name="cancel">
|
||
|
|
<description summary="indicates the frame is no longer valid">
|
||
|
|
If the capture failed or if the frame is no longer valid after the
|
||
|
|
"frame" event has been emitted, this event will be used to inform the
|
||
|
|
client to scrap the frame.
|
||
|
|
|
||
|
|
If the failure is temporary, the client may capture again the same
|
||
|
|
source. If the failure is permanent, any further attempts to capture the
|
||
|
|
same source will fail again.
|
||
|
|
|
||
|
|
After receiving this event, the client should destroy this object.
|
||
|
|
</description>
|
||
|
|
<arg name="reason" type="uint" enum="cancel_reason"
|
||
|
|
summary="indicates a reason for cancelling this frame capture"/>
|
||
|
|
</event>
|
||
|
|
|
||
|
|
<request name="destroy" type="destructor">
|
||
|
|
<description summary="delete this object, used or not">
|
||
|
|
Unreferences the frame. This request must be called as soon as its no
|
||
|
|
longer used.
|
||
|
|
|
||
|
|
It can be called at any time by the client. The client will still have
|
||
|
|
to close any FDs it has been given.
|
||
|
|
</description>
|
||
|
|
</request>
|
||
|
|
</interface>
|
||
|
|
</protocol>
|