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137 lines
6.1 KiB
XML
137 lines
6.1 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="glShaderSource">
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<refmeta>
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<refentrytitle>glShaderSource</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glShaderSource</refname>
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<refpurpose>replace the source code in 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>void <function>glShaderSource</function></funcdef>
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<paramdef>GLuint <parameter>shader</parameter></paramdef>
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<paramdef>GLsizei <parameter>count</parameter></paramdef>
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<paramdef>const GLchar * const *<parameter>string</parameter></paramdef>
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<paramdef>const GLint *<parameter>length</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>shader</parameter></term>
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<listitem>
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<para>Specifies the handle of the shader object
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whose source code is to be replaced.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>count</parameter></term>
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<listitem>
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<para>Specifies the number of elements in the
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<parameter>string</parameter> and
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<parameter>length</parameter>
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arrays.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>string</parameter></term>
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<listitem>
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<para>Specifies an array of pointers to strings
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containing the source code to be loaded into the
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shader.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>length</parameter></term>
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<listitem>
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<para>Specifies an array of string lengths.</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>For implementations that support a shader compiler,
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<function>glShaderSource</function> sets the source code
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in <parameter>shader</parameter> to the source code in the array
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of strings specified by <parameter>string</parameter>. Any
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source code previously stored in the shader object is completely
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replaced. The number of strings in the array is specified by
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<parameter>count</parameter>. If <parameter>length</parameter>
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is <constant>NULL</constant>, each string is assumed to be null
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terminated. If <parameter>length</parameter> is a value other
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than <constant>NULL</constant>, it points to an array containing
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a string length for each of the corresponding elements of
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<parameter>string</parameter>. Each element in the
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<parameter>length</parameter> array may contain the length of
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the corresponding string (the null character is not counted as
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part of the string length) or a value less than 0 to indicate
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that the string is null terminated. The source code strings are
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not scanned or parsed at this time; they are simply copied into
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the specified shader object.</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para>Shader compiler support is optional, and thus must be queried
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before use by calling <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>
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with argument <constant>GL_SHADER_COMPILER</constant>. <function>glShaderSource</function>,
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<citerefentry><refentrytitle>glCompileShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGetShaderPrecisionFormat</refentrytitle></citerefentry>, and
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<citerefentry><refentrytitle>glReleaseShaderCompiler</refentrytitle></citerefentry> will
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each generate <constant>GL_INVALID_OPERATION</constant> on implementations
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that do not support a shader compiler. Such implementations instead offer the
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<citerefentry><refentrytitle>glShaderBinary</refentrytitle></citerefentry>
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alternative for supplying a pre-compiled shader binary.</para>
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<para>OpenGL copies the shader source code strings when
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<function>glShaderSource</function> is called, so an application
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may free its copy of the source code strings immediately after
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the function returns.</para>
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</refsect1>
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<refsect1 id="errors"><title>Errors</title>
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<para><constant>GL_INVALID_OPERATION</constant> is generated if
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a shader compiler is not supported.</para>
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<para><constant>GL_INVALID_VALUE</constant> is generated if
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<parameter>shader</parameter> is not a value generated by
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OpenGL.</para>
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<para><constant>GL_INVALID_OPERATION</constant> is generated if
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<parameter>shader</parameter> is not a shader object.</para>
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<para><constant>GL_INVALID_VALUE</constant> is generated if
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<parameter>count</parameter> is less than 0.</para>
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</refsect1>
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<refsect1 id="associatedgets"><title>Associated Gets</title>
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<para><citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>
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with argument <constant>GL_SHADER_COMPILER</constant></para>
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<para><citerefentry><refentrytitle>glGetShaderiv</refentrytitle></citerefentry>
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with arguments <parameter>shader</parameter> and
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<constant>GL_SHADER_SOURCE_LENGTH</constant></para>
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<para><citerefentry><refentrytitle>glGetShaderSource</refentrytitle></citerefentry>
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with argument <parameter>shader</parameter></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>glCompileShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGetShaderPrecisionFormat</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCreateShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDeleteShader</refentrytitle></citerefentry></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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