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33994caa71
Setting up layer combine functions and blend modes is very awkward to do programatically. This adds a parser for string based descriptions which are more consise and readable. E.g. a material layer combine function could now be given as: "RGBA = ADD (TEXTURE[A], PREVIOUS[RGB])" or "RGB = REPLACE (PREVIOUS)" "A = MODULATE (PREVIOUS, TEXTURE)" The simple syntax and grammar are only designed to expose standard fixed function hardware, more advanced combining must be done with shaders. This includes standalone documentation of blend strings covering the aspects that are common to blending and texture combining, and adds documentation with examples specific to the new cogl_material_set_blend() and cogl_material_layer_set_combine() functions. Note: The hope is to remove the now redundant bits of the material API before 1.0
108 lines
3.5 KiB
XML
108 lines
3.5 KiB
XML
<?xml version="1.0"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
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<!ENTITY version SYSTEM "version.xml">
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]>
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<book id="index" xmlns:xi="http://www.w3.org/2003/XInclude">
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<bookinfo>
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<title>COGL &version; Reference Manual</title>
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<releaseinfo>Version &version;</releaseinfo>
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<copyright>
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<year>2008</year>
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<holder>OpenedHand LTD</holder>
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</copyright>
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<legalnotice>
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<para>
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Permission is granted to copy, distribute and/or modify this
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document under the terms of the <citetitle>GNU Free
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Documentation License</citetitle>, Version 1.1 or any later
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version published by the Free Software Foundation with no
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Invariant Sections, no Front-Cover Texts, and no Back-Cover
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Texts. You may obtain a copy of the <citetitle>GNU Free
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Documentation License</citetitle> from the Free Software
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Foundation by visiting <ulink type="http"
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url="http://www.fsf.org">their Web site</ulink> or by writing
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to:
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<address>
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The Free Software Foundation, Inc.,
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<street>59 Temple Place</street> - Suite 330,
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<city>Boston</city>, <state>MA</state> <postcode>02111-1307</postcode>
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,
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<country>USA</country>
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</address>
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</para>
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</legalnotice>
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</bookinfo>
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<chapter>
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<title>COGL - GL Abstraction API</title>
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<section id="cogl-intro">
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<title>About COGL</title>
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<para>COGL is a low level OpenGL abstraction library developed for (and
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part of) Clutter. It is used primarily by Clutter to provide a common
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rendering API that works transparently across OpenGL >=1.4,
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OpenGL ES 1.1 and OpenGL ES 2.0.</para>
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</section>
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<xi:include href="xml/cogl.xml"/>
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<xi:include href="xml/cogl-color.xml"/>
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<xi:include href="xml/cogl-texture.xml"/>
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<xi:include href="blend-strings.xml"/>
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<xi:include href="xml/cogl-material.xml"/>
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<xi:include href="xml/cogl-primitives.xml"/>
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<xi:include href="xml/cogl-vertex-buffer.xml"/>
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<xi:include href="xml/cogl-matrix.xml"/>
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<xi:include href="xml/cogl-shaders.xml"/>
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<xi:include href="xml/cogl-offscreen.xml"/>
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<xi:include href="xml/cogl-fixed.xml"/>
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</chapter>
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<index>
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<title>Index</title>
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</index>
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<appendix id="license">
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<title>License</title>
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<para>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the <citetitle>GNU Library General
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Public License</citetitle> as published by the Free Software
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Foundation; either version 2 of the License, or (at your option)
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any later version.
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</para>
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<para>
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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<citetitle>GNU Library General Public License</citetitle> for
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more details.
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</para>
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<para>
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You may obtain a copy of the <citetitle>GNU Library General
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Public License</citetitle> from the Free Software Foundation by
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visiting <ulink type="http" url="http://www.fsf.org">their Web
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site</ulink> or by writing to:
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<address>
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Free Software Foundation, Inc.
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<street>59 Temple Place</street> - Suite 330
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<city>Boston</city>, <state>MA</state> <postcode>02111-1307</postcode>
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<country>USA</country>
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</address>
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</para>
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</appendix>
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</book>
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