2010-09-04 03:50:09 -06:00
|
|
|
<?xml version="1.0" encoding="UTF-8" ?>
|
|
|
|
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
|
2012-04-08 03:48:18 -06:00
|
|
|
"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd"
|
|
|
|
[
|
|
|
|
<!ENTITY % defs SYSTEM "defs.ent"> %defs;
|
|
|
|
]>
|
2010-09-04 03:50:09 -06:00
|
|
|
|
|
|
|
|
|
|
|
<book id="evi">
|
|
|
|
|
|
|
|
<bookinfo>
|
|
|
|
<title>Extended Visual Information Extension</title>
|
|
|
|
<subtitle>X Project Team Standard</subtitle>
|
|
|
|
<authorgroup>
|
|
|
|
<author>
|
|
|
|
<firstname>Peter</firstname><surname>Daifuku</surname>
|
|
|
|
<affiliation><orgname>Silicon Graphics, Inc.</orgname></affiliation>
|
|
|
|
</author>
|
|
|
|
</authorgroup>
|
2012-04-08 03:48:18 -06:00
|
|
|
<releaseinfo>X Version 11, Release &fullrelvers;</releaseinfo>
|
|
|
|
<releaseinfo>Version 1.0</releaseinfo>
|
|
|
|
<copyright><year>1986-1997</year><holder>The Open Group</holder></copyright>
|
2010-09-04 03:50:09 -06:00
|
|
|
|
|
|
|
<legalnotice>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a
|
|
|
|
copy of this
|
|
|
|
software and associated documentation files (the Software), to use the
|
|
|
|
Software without restriction, including, without limitation, the rights to
|
|
|
|
copy, modify, merge, publish, distribute and sublicense the Software,
|
|
|
|
to make, have made, license and distribute derivative works thereof, and
|
|
|
|
to permit persons to whom the Software is
|
|
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
The above copyright notice and the following permission notice shall be
|
|
|
|
included in all copies of the Software:
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
2012-04-08 03:48:18 -06:00
|
|
|
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
|
2010-09-04 03:50:09 -06:00
|
|
|
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES
|
|
|
|
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-
|
|
|
|
INFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY
|
|
|
|
CLAIM, DAMAGES OR OTHER USEABILITIY, WHETHER IN AN ACTION OF
|
|
|
|
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN
|
|
|
|
CONNNECTION WITH THE SOFTWARE OR THE USE OF OTHER DEALINGS IN
|
|
|
|
THE SOFTWARE.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
Except as contained in this notice, the name of The Open Group shall not
|
|
|
|
be used in advertising or otherwise to promote the use or other dealings
|
|
|
|
in this Software without prior written authorization from The Open Group.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
X Window System is a trademark of The Open Group.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
</legalnotice>
|
|
|
|
</bookinfo>
|
|
|
|
|
2011-04-17 09:18:17 -06:00
|
|
|
<chapter id="Introduction">
|
2010-09-04 03:50:09 -06:00
|
|
|
<title>Introduction</title>
|
|
|
|
<para>
|
|
|
|
EVI (Extended Visual Information extension) allows a client to determine
|
|
|
|
information about core X visuals beyond what the core protocol provides.
|
|
|
|
</para>
|
2011-04-17 09:18:17 -06:00
|
|
|
</chapter>
|
2010-09-04 03:50:09 -06:00
|
|
|
|
2011-04-17 09:18:17 -06:00
|
|
|
<chapter id="Goals">
|
2010-09-04 03:50:09 -06:00
|
|
|
<title>Goals</title>
|
|
|
|
<para>
|
|
|
|
As the X Window System has evolved, it has become clear that the information
|
|
|
|
returned by the core X protocol regarding Visuals is often insufficient for a
|
|
|
|
client to determine which is the most appropriate visual for its needs. This
|
|
|
|
extension allows clients to query the X server for additional visual
|
|
|
|
information, specifically as regards colormaps and framebuffer levels.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
This extension is meant to address the needs of pure X clients only. It is
|
|
|
|
specifically and purposefully not designed to address the needs of X
|
|
|
|
extensions. Extensions that have an impact on visual information should provide
|
|
|
|
their own mechanisms for delivering that information. For example, the Double
|
|
|
|
Buffering Extension (DBE) provides its own mechanism for determining which
|
|
|
|
visuals support double-buffering.
|
|
|
|
</para>
|
2011-04-17 09:18:17 -06:00
|
|
|
</chapter>
|
2010-09-04 03:50:09 -06:00
|
|
|
|
2011-04-17 09:18:17 -06:00
|
|
|
<chapter id="Requests">
|
2010-09-04 03:50:09 -06:00
|
|
|
<title>Requests</title>
|
|
|
|
<para>
|
|
|
|
<function>GetVersion</function>
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<informaltable frame="none">
|
2012-04-08 03:48:18 -06:00
|
|
|
<?dbfo keep-together="always" ?>
|
|
|
|
<tgroup cols='1' align='left' colsep='0' rowsep='0'>
|
|
|
|
<colspec colname='c1' colwidth="1.0*"/>
|
2010-09-04 03:50:09 -06:00
|
|
|
<tbody>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
<emphasis remap='I'>client_major_version</emphasis>: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
<emphasis remap='I'>client_minor_version</emphasis>: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
=>
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
<emphasis remap='I'>server_major_version</emphasis>: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
<emphasis remap='I'>server_minor_version</emphasis>: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
|
|
|
</tbody>
|
|
|
|
</tgroup>
|
|
|
|
</informaltable>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<para>
|
|
|
|
If supplied, the client_major_version and client_minor_version indicate
|
|
|
|
what version of the protocol the client wants the server to implement.
|
|
|
|
The server version numbers returned indicate the protocol this extension
|
|
|
|
actually supports. This might not equal the version sent by the client.
|
|
|
|
An implementation can (but need not) support more than one version
|
|
|
|
simultaneously. The server_major_version and the server_minor_version
|
|
|
|
are a mechanism to support future revisions of the EVI protocol that
|
|
|
|
may be necessary. In general, the major version would increment for
|
|
|
|
incompatible changes, and the minor version would increment for small
|
|
|
|
upward-compatible changes. Servers that support the protocol defined in
|
|
|
|
this document will return a server_major_version of one (1), and a
|
|
|
|
server_minor_version of zero (0).
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
<function> GetVisualInfo</function>
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<informaltable frame="none">
|
2012-04-08 03:48:18 -06:00
|
|
|
<?dbfo keep-together="always" ?>
|
|
|
|
<tgroup cols='1' align='left' colsep='0' rowsep='0'>
|
|
|
|
<colspec colname='c1' colwidth="1.0*"/>
|
2010-09-04 03:50:09 -06:00
|
|
|
<tbody>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
<emphasis remap='I'>visual_list</emphasis>: LISTofVISUALID
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
=>
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
<emphasis remap='I'>per_visual_info</emphasis>: LISTofVISUALINFO
|
|
|
|
</entry>
|
|
|
|
</row>
|
|
|
|
</tbody>
|
|
|
|
</tgroup>
|
|
|
|
</informaltable>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
where:
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<informaltable frame="none">
|
2012-04-08 03:48:18 -06:00
|
|
|
<?dbfo keep-together="always" ?>
|
|
|
|
<tgroup cols='1' align='left' colsep='0' rowsep='0'>
|
|
|
|
<colspec colname='c1' colwidth="1.0*"/>
|
2010-09-04 03:50:09 -06:00
|
|
|
<tbody>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
VISUALINFO: [core_visual_id: VISUALID
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
screen: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
level: INT8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
transparency_type: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
unused: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
transparency_value: CARD32
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
min_hw_colormaps: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
max_hw_colormaps: CARD8
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
num_colormap_conflicts: CARD16
|
|
|
|
</entry>
|
|
|
|
</row>
|
2012-04-08 03:48:18 -06:00
|
|
|
<row>
|
2010-09-04 03:50:09 -06:00
|
|
|
<entry>
|
|
|
|
colormap_conflicts: LISTofVISUALID]
|
|
|
|
</entry>
|
|
|
|
</row>
|
|
|
|
</tbody>
|
|
|
|
</tgroup>
|
|
|
|
</informaltable>
|
|
|
|
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
level is 0 for normal planes, > 0 for overlays, < 0 for underlays.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
transparency_type is 0 for none, 1 for transparent pixel, 2 for
|
|
|
|
transparent mask.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
transparency_value: value to get transparent pixel if transparency
|
|
|
|
supported.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
min_hw_colormaps: minimum number of hardware colormaps backing up the
|
|
|
|
visual.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
max_hw_colormaps: maximum number of hardware colormaps backing up the
|
|
|
|
visual.
|
|
|
|
</para>
|
|
|
|
<para>
|
|
|
|
(architectures with static colormap allocation/reallocation would have min
|
|
|
|
= max)
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
num_colormap_conflicts: number of elements in colormap_conflicts.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
colormap_conflicts: list of visuals that may conflict with this one. For
|
|
|
|
example, if a 12-bit colormap is overloaded to support 8-bit visuals, the
|
|
|
|
8-bit visuals would conflict with the 12-bit visuals.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
|
2011-04-17 09:18:17 -06:00
|
|
|
</chapter>
|
|
|
|
<chapter id="Events_and_Errors">
|
2010-09-04 03:50:09 -06:00
|
|
|
<title>Events and Errors</title>
|
|
|
|
<para>
|
|
|
|
No new events or errors are defined by this extension.
|
|
|
|
</para>
|
2011-04-17 09:18:17 -06:00
|
|
|
</chapter>
|
2010-09-04 03:50:09 -06:00
|
|
|
|
2012-04-08 03:48:18 -06:00
|
|
|
<chapter id='Changes_to_existing_protocol'>
|
2010-09-04 03:50:09 -06:00
|
|
|
<title>Changes to existing protocol.</title>
|
|
|
|
<para>
|
|
|
|
None.
|
|
|
|
</para>
|
2011-04-17 09:18:17 -06:00
|
|
|
</chapter>
|
2010-09-04 03:50:09 -06:00
|
|
|
|
2011-04-17 09:18:17 -06:00
|
|
|
<chapter id="Encoding">
|
2010-09-04 03:50:09 -06:00
|
|
|
<title>Encoding</title>
|
|
|
|
<para>
|
|
|
|
The name of this extension is "Extended-Visual-Information".
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
The conventions used here are the same as those for the core X11
|
|
|
|
Protocol Encoding.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<literallayout class="monospaced">
|
|
|
|
<function>GetVersion</function>
|
|
|
|
1 CARD8 opcode
|
|
|
|
1 0 EVI opcode
|
|
|
|
2 2 request length
|
|
|
|
2 CARD16 client_major_version
|
|
|
|
2 CARD16 client_minor_version
|
|
|
|
=>
|
|
|
|
1 1 reply
|
|
|
|
1 unused
|
|
|
|
2 CARD16 sequence number
|
|
|
|
4 0 length
|
|
|
|
2 CARD16 server_major_version
|
|
|
|
2 CARD16 server_minor_version
|
|
|
|
20 unused
|
|
|
|
</literallayout>
|
|
|
|
|
|
|
|
<literallayout class="monospaced">
|
|
|
|
<function>GetVisualInfo</function>
|
|
|
|
1 CARD8 opcode
|
|
|
|
1 1 EVI opcode
|
|
|
|
2 2+n request length
|
|
|
|
4 CARD32 n_visual
|
|
|
|
4n CARD32 visual_ids
|
|
|
|
=>
|
|
|
|
1 1 reply
|
|
|
|
1 unused
|
|
|
|
2 CARD16 sequence number
|
|
|
|
4 n length
|
|
|
|
4 CARD32 n_info
|
|
|
|
4 CARD32 n_conflicts
|
|
|
|
16 unused
|
|
|
|
16n LISTofVISUALINFO items
|
|
|
|
</literallayout>
|
|
|
|
|
|
|
|
<literallayout class="monospaced">
|
|
|
|
VISUALINFO
|
|
|
|
4 VisualID core_visual_id
|
|
|
|
1 INT8 screen
|
|
|
|
1 INT8 level
|
|
|
|
1 CARD8 transparency_type
|
|
|
|
1 CARD8 unused
|
|
|
|
4 CARD32 transparency_value
|
|
|
|
1 CARD8 min_hw_colormaps
|
|
|
|
1 CARD8 max_hw_colormaps
|
|
|
|
2 CARD16 num_colormap_conflicts
|
|
|
|
</literallayout>
|
2011-04-17 09:18:17 -06:00
|
|
|
</chapter>
|
2010-09-04 03:50:09 -06:00
|
|
|
|
2011-04-17 09:18:17 -06:00
|
|
|
<chapter id="C_Language_Binding">
|
2010-09-04 03:50:09 -06:00
|
|
|
<title>C Language Binding</title>
|
|
|
|
<para>
|
|
|
|
<!-- .LP -->
|
|
|
|
The C functions provide direct access to the protocol and add no additional
|
|
|
|
semantics. For complete details on the effects of these functions, refer
|
|
|
|
to the appropriate protocol request, which can be derived by deleting Xevi
|
|
|
|
at the start of the function. All functions that have return type Status
|
|
|
|
will return nonzero for success and zero for failure.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
The include file for this extension is:
|
|
|
|
<function>< X11/extensions/XEVI.h></function>.
|
|
|
|
</para>
|
|
|
|
|
2012-04-08 03:48:18 -06:00
|
|
|
<funcsynopsis id='XeviQueryVersion'>
|
2010-09-04 03:50:09 -06:00
|
|
|
<funcprototype>
|
|
|
|
<funcdef>Bool <function> XeviQueryVersion</function></funcdef>
|
|
|
|
<paramdef>Display<parameter> *display</parameter></paramdef>
|
|
|
|
<paramdef>int<parameter> *major_version_return</parameter></paramdef>
|
|
|
|
<paramdef>int<parameter> *minor_version_return</parameter></paramdef>
|
|
|
|
</funcprototype>
|
|
|
|
</funcsynopsis>
|
|
|
|
|
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>display</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Specifies the connection to the X server.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>major_version_return</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Returns the major version supported by the server.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>minor_version_return</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Returns the minor version supported by the server.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
XeviQueryVersion sets major_version_return and minor_version_return to
|
|
|
|
the major and minor EVI protocol version supported by the server. If
|
|
|
|
the EVI library is compatible with the version returned by the server,
|
|
|
|
it returns nonzero. If dpy does not support the EVI extension, or if
|
|
|
|
there was an error during communication with the server, or if the server
|
|
|
|
and library protocol versions are incompatible, it returns zero. No other
|
|
|
|
Xevi functions may be called before this function. If a client violates
|
|
|
|
this rule, the effects of all subsequent Xevi calls that it makes are
|
|
|
|
undefined.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
To get the extended information for any subset of visuals use
|
|
|
|
XeviGetVisualInfo.
|
|
|
|
</para>
|
|
|
|
|
2012-04-08 03:48:18 -06:00
|
|
|
<funcsynopsis id='XeviGetVisualInfo'>
|
2010-09-04 03:50:09 -06:00
|
|
|
<funcprototype>
|
|
|
|
<funcdef>int <function> XeviGetVisualInfo</function></funcdef>
|
|
|
|
<paramdef>Display<parameter> *display</parameter></paramdef>
|
|
|
|
<paramdef>VisualID<parameter> *visual</parameter></paramdef>
|
|
|
|
<paramdef>int<parameter> n_visual</parameter></paramdef>
|
|
|
|
<paramdef>ExtendedVisualInfo<parameter> **evi_return</parameter></paramdef>
|
|
|
|
<paramdef>int<parameter> *n_info_return</parameter></paramdef>
|
|
|
|
</funcprototype>
|
|
|
|
</funcsynopsis>
|
|
|
|
|
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>display</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Specifies the connection to the X server.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>visual</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
If NULL, then information for all visuals of all
|
|
|
|
screens is returned. Otherwise, a pointer to a list of visuals for which
|
|
|
|
extended visual information is desired.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>n_visual</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
If 0, then information for all visuals of all screens is returned. Otherwise,
|
|
|
|
the number of elements in the array <emphasis remap='I'>visual</emphasis>.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>evi_return</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Returns a pointer to a list of <emphasis remap='I'>ExtendedVisualInfo</emphasis>. When done, the client
|
|
|
|
should free the list using <emphasis remap='I'>XFree</emphasis>.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
|
|
<term>
|
|
|
|
<emphasis remap='I'>n_info_return</emphasis>
|
|
|
|
</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Returns the number of elements in the list of
|
|
|
|
<emphasis remap='I'>ExtendedVisualInfo</emphasis>.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
XeviGetVisualInfo returns a list of ExtendedVisualInfo structures that describe
|
|
|
|
visual information beyond that supported by the core protocol. This includes
|
|
|
|
layer information relevant for systems supporting overlays and/or underlay
|
|
|
|
planes, and information that allows applications better to determine the level
|
|
|
|
of hardware support for multiple colormaps. XeviGetVisualInfo returns Success
|
|
|
|
if successful, or an X error otherwise.
|
|
|
|
</para>
|
|
|
|
|
|
|
|
</chapter>
|
|
|
|
</book>
|