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diff --git a/specs/evi.xml b/specs/evi.xml new file mode 100644 index 0000000..7b661f6 --- /dev/null +++ b/specs/evi.xml @@ -0,0 +1,519 @@ +<?xml version="1.0" encoding="UTF-8" ?> +<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" + "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" +[ +<!ENTITY % defs SYSTEM "defs.ent"> %defs; +]> + + +<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> + <releaseinfo>X Version 11, Release &fullrelvers;</releaseinfo> + <releaseinfo>Version 1.0</releaseinfo> + <copyright><year>1986-1997</year><holder>The Open Group</holder></copyright> + +<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> +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 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> + +<chapter id="Introduction"> +<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> +</chapter> + +<chapter id="Goals"> +<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> +</chapter> + +<chapter id="Requests"> +<title>Requests</title> +<para> +<function>GetVersion</function> +</para> + +<informaltable frame="none"> + <?dbfo keep-together="always" ?> + <tgroup cols='1' align='left' colsep='0' rowsep='0'> + <colspec colname='c1' colwidth="1.0*"/> + <tbody> + <row> + <entry> +<emphasis remap='I'>client_major_version</emphasis>: CARD8 + </entry> + </row> + <row> + <entry> +<emphasis remap='I'>client_minor_version</emphasis>: CARD8 + </entry> + </row> + <row> + <entry> +=> + </entry> + </row> + <row> + <entry> +<emphasis remap='I'>server_major_version</emphasis>: CARD8 + </entry> + </row> + <row> + <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"> + <?dbfo keep-together="always" ?> + <tgroup cols='1' align='left' colsep='0' rowsep='0'> + <colspec colname='c1' colwidth="1.0*"/> + <tbody> + <row> + <entry> +<emphasis remap='I'>visual_list</emphasis>: LISTofVISUALID + </entry> + </row> + <row> + <entry> +=> + </entry> + </row> + <row> + <entry> +<emphasis remap='I'>per_visual_info</emphasis>: LISTofVISUALINFO + </entry> + </row> + </tbody> + </tgroup> +</informaltable> + +<para> +where: +</para> + +<informaltable frame="none"> + <?dbfo keep-together="always" ?> + <tgroup cols='1' align='left' colsep='0' rowsep='0'> + <colspec colname='c1' colwidth="1.0*"/> + <tbody> + <row> + <entry> +VISUALINFO: [core_visual_id: VISUALID + </entry> + </row> + <row> + <entry> +screen: CARD8 + </entry> + </row> + <row> + <entry> +level: INT8 + </entry> + </row> + <row> + <entry> +transparency_type: CARD8 + </entry> + </row> + <row> + <entry> +unused: CARD8 + </entry> + </row> + <row> + <entry> +transparency_value: CARD32 + </entry> + </row> + <row> + <entry> +min_hw_colormaps: CARD8 + </entry> + </row> + <row> + <entry> +max_hw_colormaps: CARD8 + </entry> + </row> + <row> + <entry> +num_colormap_conflicts: CARD16 + </entry> + </row> + <row> + <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> + +</chapter> +<chapter id="Events_and_Errors"> +<title>Events and Errors</title> +<para> +No new events or errors are defined by this extension. +</para> +</chapter> + +<chapter id='Changes_to_existing_protocol'> +<title>Changes to existing protocol.</title> +<para> +None. +</para> +</chapter> + +<chapter id="Encoding"> +<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> +</chapter> + +<chapter id="C_Language_Binding"> +<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> + +<funcsynopsis id='XeviQueryVersion'> +<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> + +<funcsynopsis id='XeviGetVisualInfo'> +<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> |