upstream-man-pages/man2/glGetShaderInfoLog.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
   2 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
   3               "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
   4 <refentry id="glGetShaderInfoLog">
   5     <refmeta>
   6         <refentrytitle>glGetShaderInfoLog</refentrytitle>
   7         <manvolnum>3G</manvolnum>
   8     </refmeta>
   9     <refnamediv>
  10         <refname>glGetShaderInfoLog</refname>
  11         <refpurpose>Returns the information log for a shader object</refpurpose>
  12     </refnamediv>
  13     <refsynopsisdiv><title>C Specification</title>
  14         <funcsynopsis>
  15             <funcprototype>
  16                 <funcdef>void <function>glGetShaderInfoLog</function></funcdef>
  17                 <paramdef>GLuint <parameter>shader</parameter></paramdef>
  18                 <paramdef>GLsizei <parameter>maxLength</parameter></paramdef>
  19                 <paramdef>GLsizei *<parameter>length</parameter></paramdef>
  20                 <paramdef>GLchar *<parameter>infoLog</parameter></paramdef>
  21             </funcprototype>
  22         </funcsynopsis>
  23     </refsynopsisdiv>
  24     <refsect1 id="parameters"><title>Parameters</title>
  25         <variablelist>
  26             <varlistentry>
  27                 <term><parameter>shader</parameter></term>
  28                 <listitem>
  29                     <para>Specifies the shader object whose information
  30                     log is to be queried.</para>
  31                 </listitem>
  32             </varlistentry>
  33             <varlistentry>
  34                 <term><parameter>maxLength</parameter></term>
  35                 <listitem>
  36                     <para>Specifies the size of the character buffer for
  37                     storing the returned information log.</para>
  38                 </listitem>
  39             </varlistentry>
  40             <varlistentry>
  41                 <term><parameter>length</parameter></term>
  42                 <listitem>
  43                     <para>Returns the length of the string returned in
  44                     <parameter>infoLog</parameter> (excluding the null
  45                     terminator).</para>
  46                 </listitem>
  47             </varlistentry>
  48             <varlistentry>
  49                 <term><parameter>infoLog</parameter></term>
  50                 <listitem>
  51                     <para>Specifies an array of characters that is used
  52                     to return the information log.</para>
  53                 </listitem>
  54             </varlistentry>
  55         </variablelist>
  56     </refsect1>
  57     <refsect1 id="description"><title>Description</title>
  58         <para><function>glGetShaderInfoLog</function> returns the
  59         information log for the specified shader object. The information
  60         log for a shader object is modified when the shader is compiled.
  61         The string that is returned will be null terminated.</para>
  62
  63         <para><function>glGetShaderInfoLog</function> returns in
  64         <parameter>infoLog</parameter> as much of the information log as
  65         it can, up to a maximum of <parameter>maxLength</parameter>
  66         characters. The number of characters actually returned,
  67         excluding the null termination character, is specified by
  68         <parameter>length</parameter>. If the length of the returned
  69         string is not required, a value of <constant>NULL</constant> can
  70         be passed in the <parameter>length</parameter> argument. The
  71         size of the buffer required to store the returned information
  72         log can be obtained by calling
  73         <citerefentry><refentrytitle>glGetShader</refentrytitle></citerefentry>
  74         with the value <constant>GL_INFO_LOG_LENGTH</constant>.</para>
  75
  76         <para>The information log for a shader object is a string that
  77         may contain diagnostic messages, warning messages, and other
  78         information about the last compile operation. When a shader
  79         object is created, its information log will be a string of
  80         length 0.</para>
  81     </refsect1>
  82     <refsect1 id="notes"><title>Notes</title>
  83         <para><function>glGetShaderInfoLog</function> is available only
  84         if the GL version is 2.0 or greater.</para>
  85
  86         <para>The information log for a shader object is the OpenGL
  87         implementer's primary mechanism for conveying information about
  88         the compilation process. Therefore, the information log can be
  89         helpful to application developers during the development
  90         process, even when compilation is successful. Application
  91         developers should not expect different OpenGL implementations to
  92         produce identical information logs.</para>
  93     </refsect1>
  94     <refsect1 id="errors"><title>Errors</title>
  95         <para><constant>GL_INVALID_VALUE</constant> is generated if
  96         <parameter>shader</parameter> is not a value generated by
  97         OpenGL.</para>
  98
  99         <para><constant>GL_INVALID_OPERATION</constant> is generated if
 100         <parameter>shader</parameter> is not a shader object.</para>
 101
 102         <para><constant>GL_INVALID_VALUE</constant> is generated if
 103         <parameter>maxLength</parameter> is less than 0.</para>
 104
 105         <para><constant>GL_INVALID_OPERATION</constant> is generated if
 106         <function>glGetShaderInfoLog</function> is executed between the
 107         execution of
 108         <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry>
 109         and the corresponding execution of
 110         <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>.</para>
 111     </refsect1>
 112     <refsect1 id="associatedgets"><title>Associated Gets</title>
 113         <para><citerefentry><refentrytitle>glGetShader</refentrytitle></citerefentry>
 114         with argument <constant>GL_INFO_LOG_LENGTH</constant></para>
 115
 116         <para><citerefentry><refentrytitle>glIsShader</refentrytitle></citerefentry></para>
 117     </refsect1>
 118     <refsect1 id="seealso"><title>See Also</title>
 119         <para><citerefentry><refentrytitle>glCompileShader</refentrytitle></citerefentry>,
 120         <citerefentry><refentrytitle>glGetProgramInfoLog</refentrytitle></citerefentry>,
 121         <citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>,
 122         <citerefentry><refentrytitle>glValidateProgram</refentrytitle></citerefentry></para>
 123     </refsect1>
 124     <refsect1 id="Copyright"><title>Copyright</title>
 125         <para>
 126             Copyright <trademark class="copyright"></trademark> 2003-2005 3Dlabs Inc. Ltd.
 127             This material may be distributed subject to the terms and conditions set forth in
 128             the Open Publication License, v 1.0, 8 June 1999.
 129             <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
 130         </para>
 131     </refsect1>
 132 </refentry>