111 lines
4.8 KiB
XML
111 lines
4.8 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
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"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
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<refentry id="glCreateShader">
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<refmeta>
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<refentrytitle>glCreateShader</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glCreateShader</refname>
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<refpurpose>Creates a shader object</refpurpose>
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</refnamediv>
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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>GLuint <function>glCreateShader</function></funcdef>
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<paramdef>GLenum <parameter>shaderType</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1 id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>shaderType</parameter></term>
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<listitem>
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<para>Specifies the type of shader to be created.
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Must be either <constant>GL_VERTEX_SHADER</constant>
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or <constant>GL_FRAGMENT_SHADER</constant>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id="description"><title>Description</title>
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<para><function>glCreateShader</function> creates an empty
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shader object and returns a non-zero value by which it can be
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referenced. A shader object is used to maintain the source code
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strings that define a shader. <parameter>shaderType</parameter>
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indicates the type of shader to be created. Two types of shaders
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are supported. A shader of type
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<constant>GL_VERTEX_SHADER</constant> is a shader that is
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intended to run on the programmable vertex processor and replace
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the fixed functionality vertex processing in OpenGL. A shader of
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type <constant>GL_FRAGMENT_SHADER</constant> is a shader that is
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intended to run on the programmable fragment processor and
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replace the fixed functionality fragment processing in
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OpenGL.</para>
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<para>When created, a shader object's
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<constant>GL_SHADER_TYPE</constant> parameter is set to either
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<constant>GL_VERTEX_SHADER</constant> or
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<constant>GL_FRAGMENT_SHADER</constant>, depending on the value
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of <parameter>shaderType</parameter>.</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para><function>glCreateShader</function> is available only if
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the GL version is 2.0 or greater.</para>
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<para>Like display lists and texture objects, the name space for
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shader objects may be shared across a set of contexts, as long
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as the server sides of the contexts share the same address
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space. If the name space is shared across contexts, any attached
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objects and the data associated with those attached objects are
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shared as well.</para>
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<para>Applications are responsible for providing the
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synchronization across API calls when objects are accessed from
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different execution threads.</para>
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</refsect1>
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<refsect1 id="errors"><title>Errors</title>
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<para>This function returns 0 if an error occurs creating the
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shader object.</para>
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<para><constant>GL_INVALID_ENUM</constant> is generated if
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<parameter>shaderType</parameter> is not an accepted value.</para>
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<para><constant>GL_INVALID_OPERATION</constant> is generated if
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<function>glCreateShader</function> is executed between the
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execution of
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<citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry>
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and the corresponding execution of
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<citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>.</para>
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</refsect1>
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<refsect1 id="associatedgets"><title>Associated Gets</title>
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<para><citerefentry><refentrytitle>glGetShader</refentrytitle></citerefentry>
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with a valid shader object and the parameter to be queried</para>
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<para><citerefentry><refentrytitle>glGetShaderInfoLog</refentrytitle></citerefentry>
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with a valid shader object</para>
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<para><citerefentry><refentrytitle>glGetShaderSource</refentrytitle></citerefentry>
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with a valid shader object</para>
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<para><citerefentry><refentrytitle>glIsShader</refentrytitle></citerefentry></para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para><citerefentry><refentrytitle>glAttachShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCompileShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDeleteShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDetachShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glShaderSource</refentrytitle></citerefentry>
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</para>
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</refsect1>
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<refsect1 id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"></trademark> 2003-2005 3Dlabs Inc. Ltd.
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This material may be distributed subject to the terms and conditions set forth in
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the Open Publication License, v 1.0, 8 June 1999.
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<ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
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</para>
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</refsect1>
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</refentry>
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