upstream-doc/man3/glBindTexture.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="glBindTexture">
   5     <refmeta>
   6         <refmetainfo>
   7             <copyright>
   8                 <year>1991-2006</year>
   9                 <holder>Silicon Graphics, Inc.</holder>
  10             </copyright>
  11         </refmetainfo>
  12         <refentrytitle>glBindTexture</refentrytitle>
  13         <manvolnum>3G</manvolnum>
  14     </refmeta>
  15     <refnamediv>
  16         <refname>glBindTexture</refname>
  17         <refpurpose>bind a named texture to a texturing target</refpurpose>
  18     </refnamediv>
  19     <refsynopsisdiv><title>C Specification</title>
  20         <funcsynopsis>
  21             <funcprototype>
  22                 <funcdef>void <function>glBindTexture</function></funcdef>
  23                 <paramdef>GLenum <parameter>target</parameter></paramdef>
  24                 <paramdef>GLuint <parameter>texture</parameter></paramdef>
  25             </funcprototype>
  26         </funcsynopsis>
  27     </refsynopsisdiv>
  28     <refsect1 id="parameters"><title>Parameters</title>
  29         <variablelist>
  30         <varlistentry>
  31             <term><parameter>target</parameter></term>
  32             <listitem>
  33                 <para>
  34                     Specifies the target to which the texture is bound.
  35                     Must be either
  36                     <constant>GL_TEXTURE_1D</constant>,
  37                     <constant>GL_TEXTURE_2D</constant>,
  38                     <constant>GL_TEXTURE_3D</constant>, or
  39                     <constant>GL_TEXTURE_1D_ARRAY</constant>,
  40                     <constant>GL_TEXTURE_2D_ARRAY</constant>,
  41                     <constant>GL_TEXTURE_RECTANGLE</constant>,
  42                     <constant>GL_TEXTURE_CUBE_MAP</constant>,
  43                     <constant>GL_TEXTURE_BUFFER</constant>,
  44                     <constant>GL_TEXTURE_2D_MULTISAMPLE</constant> or
  45                     <constant>GL_TEXTURE_2D_MULTISAMPLE_ARRAY</constant>.
  46                 </para>
  47             </listitem>
  48         </varlistentry>
  49         <varlistentry>
  50             <term><parameter>texture</parameter></term>
  51             <listitem>
  52                 <para>
  53                     Specifies the name of a texture.
  54                 </para>
  55             </listitem>
  56         </varlistentry>
  57         </variablelist>
  58     </refsect1>
  59     <refsect1 id="description"><title>Description</title>
  60         <para>
  61             <function>glBindTexture</function> lets you create or use a named texture. Calling <function>glBindTexture</function> with
  62             <parameter>target</parameter> set to
  63             <constant>GL_TEXTURE_1D</constant>,
  64             <constant>GL_TEXTURE_2D</constant>,
  65             <constant>GL_TEXTURE_3D</constant>, or
  66             <constant>GL_TEXTURE_1D_ARRAY</constant>,
  67             <constant>GL_TEXTURE_2D_ARRAY</constant>,
  68             <constant>GL_TEXTURE_RECTANGLE</constant>,
  69             <constant>GL_TEXTURE_CUBE_MAP</constant>,
  70             <constant>GL_TEXTURE_BUFFER</constant>,
  71             <constant>GL_TEXTURE_2D_MULTISAMPLE</constant> or
  72             <constant>GL_TEXTURE_2D_MULTISAMPLE_ARRAY</constant>
  73             and <parameter>texture</parameter> set to the name of the new texture binds the texture name to the target.
  74             When a texture is bound to a target, the previous binding for that target is automatically broken.
  75         </para>
  76         <para>
  77             Texture names are unsigned integers. The value zero is reserved to
  78             represent the default texture for each texture target.
  79             Texture names and the corresponding texture contents are local to
  80             the shared object space of the current GL rendering context;
  81             two rendering contexts share texture names only if they
  82             explicitly enable sharing between contexts through the appropriate GL windows interfaces functions.
  83         </para>
  84         <para>
  85             You must use <citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry> to generate a set of new texture names.
  86         </para>
  87         <para>
  88             When a texture is first bound, it assumes the specified target:
  89             A texture first bound to <constant>GL_TEXTURE_1D</constant> becomes one-dimensional texture, a
  90             texture first bound to <constant>GL_TEXTURE_2D</constant> becomes two-dimensional texture, a
  91             texture first bound to <constant>GL_TEXTURE_3D</constant> becomes three-dimensional texture, a
  92             texture first bound to <constant>GL_TEXTURE_1D_ARRAY</constant> becomes one-dimensional array texture, a
  93             texture first bound to <constant>GL_TEXTURE_2D_ARRAY</constant> becomes two-dimensional arary texture, a
  94             texture first bound to <constant>GL_TEXTURE_RECTANGLE</constant> becomes rectangle texture, a,
  95             texture first bound to <constant>GL_TEXTURE_CUBE_MAP</constant> becomes a cube-mapped texture, a
  96             texture first bound to <constant>GL_TEXTURE_BUFFER</constant> becomes a buffer texture, a
  97             texture first bound to <constant>GL_TEXTURE_2D_MULTISAMPLE</constant> becomes a two-dimensional multisampled texture, and a
  98             texture first bound to <constant>GL_TEXTURE_2D_MULTISAMPLE_ARRAY</constant> becomes a two-dimensional multisampled array texture.
  99             The state of a one-dimensional texture immediately after it is first bound is equivalent to the state of the
 100             default <constant>GL_TEXTURE_1D</constant> at GL initialization, and similarly for the other texture types.
 101         </para>
 102         <para>
 103             While a texture is bound, GL operations on the target to which it is
 104             bound affect the bound texture, and queries of the target to which it
 105             is bound return state from the bound texture.
 106             In effect, the texture targets become aliases for the textures currently
 107             bound to them, and the texture name zero refers to the default textures
 108             that were bound to them at initialization.
 109         </para>
 110         <para>
 111             A texture binding created with <function>glBindTexture</function> remains active until a different
 112             texture is bound to the same target, or until the bound texture is
 113             deleted with <citerefentry><refentrytitle>glDeleteTextures</refentrytitle></citerefentry>.
 114         </para>
 115         <para>
 116             Once created, a named texture may be re-bound to its same original target as often as needed.
 117             It is usually much faster to use <function>glBindTexture</function> to bind an existing named
 118             texture to one of the texture targets than it is to reload the texture image
 119             using <citerefentry><refentrytitle>glTexImage1D</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>,
 120             <citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry> or another similar function.
 121         </para>
 122     </refsect1>
 123     <refsect1 id="notes"><title>Notes</title>
 124         <para>
 125             The <constant>GL_TEXTURE_2D_MULTISAMPLE</constant> and <constant>GL_TEXTURE_2D_MULTISAMPLE_ARRAY</constant> targets are available
 126             only if the GL version is 3.2 or higher.
 127         </para>
 128     </refsect1>
 129     <refsect1 id="errors"><title>Errors</title>
 130         <para>
 131             <constant>GL_INVALID_ENUM</constant> is generated if <parameter>target</parameter> is not one of the allowable
 132             values.
 133         </para>
 134         <para>
 135             <constant>GL_INVALID_VALUE</constant> is generated if <parameter>target</parameter> is not a name returned from
 136             a previous call to <citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry>.
 137         </para>
 138         <para>
 139             <constant>GL_INVALID_OPERATION</constant> is generated if <parameter>texture</parameter> was previously created with a target
 140             that doesn't match that of <parameter>target</parameter>.
 141         </para>
 142     </refsect1>
 143     <refsect1 id="associatedgets"><title>Associated Gets</title>
 144         <para>
 145             <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_TEXTURE_BINDING_1D</constant>,
 146             <constant>GL_TEXTURE_BINDING_2D</constant>, <constant>GL_TEXTURE_BINDING_3D</constant>, <constant>GL_TEXTURE_BINDING_1D_ARRAY</constant>,
 147             <constant>GL_TEXTURE_BINDING_2D_ARRAY</constant>, <constant>GL_TEXTURE_BINDING_RECTANGLE</constant>, <constant>GL_TEXTURE_BINDING_2D_MULTISAMPLE</constant>,
 148             or <constant>GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY</constant>.
 149         </para>
 150     </refsect1>
 151     <refsect1 id="seealso"><title>See Also</title>
 152         <para>
 153             <citerefentry><refentrytitle>glDeleteTextures</refentrytitle></citerefentry>,
 154             <citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry>,
 155             <citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>,
 156             <citerefentry><refentrytitle>glGetTexParameter</refentrytitle></citerefentry>,
 157             <citerefentry><refentrytitle>glIsTexture</refentrytitle></citerefentry>,
 158             <citerefentry><refentrytitle>glTexImage1D</refentrytitle></citerefentry>,
 159             <citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>,
 160             <citerefentry><refentrytitle>glTexImage2DMultisample</refentrytitle></citerefentry>,
 161             <citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry>,
 162             <citerefentry><refentrytitle>glTexImage3DMultisample</refentrytitle></citerefentry>,
 163             <citerefentry><refentrytitle>glTexBuffer</refentrytitle></citerefentry>,
 164             <citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>
 165         </para>
 166     </refsect1>
 167     <refsect1 id="Copyright"><title>Copyright</title>
 168         <para>
 169             Copyright <trademark class="copyright"></trademark> 1991-2006
 170             Silicon Graphics, Inc. This document is licensed under the SGI
 171             Free Software B License. For details, see
 172             <ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
 173         </para>
 174     </refsect1>
 175 </refentry>