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157 lines
8 KiB
XML
157 lines
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="glBindTextures">
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<refentryinfo>
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<copyright>
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<year>2013</year>
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<holder>Khronos Group</holder>
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</copyright>
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</refentryinfo>
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<refmeta>
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<refentrytitle>glBindTextures</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glBindTextures</refname>
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<refpurpose>bind one or more named textures to a sequence of consecutive texture units</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>glBindTextures</function></funcdef>
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<paramdef>GLuint <parameter>first</parameter></paramdef>
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<paramdef>GLsizei <parameter>count</parameter></paramdef>
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<paramdef>const GLuint *<parameter>textures</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>first</parameter></term>
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<listitem>
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<para>
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Specifies the first texture unit to which a texture is to be bound.
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</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>
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Specifies the number of textures to bind.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>textures</parameter></term>
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<listitem>
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<para>
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Specifies the address of an array of names of existing texture objects.
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</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>
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<function>glBindTextures</function> binds an array of existing texture objects to a specified
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number of consecutive texture units. <parameter>count</parameter> specifies the number of texture
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objects whose names are stored in the array <parameter>textures</parameter>. That number
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of texture names are read from the array and bound to the <parameter>count</parameter> consecutive
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texture units starting from <parameter>first</parameter>. The target, or type of texture is
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deduced from the texture object and each texture is bound to the corresponding target of the
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texture unit. If the name zero appears in the <parameter>textures</parameter> array, any existing binding
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to any target of the texture unit is reset and the default texture for that target is bound in
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its place. Any non-zero entry in <parameter>textures</parameter> must be the name of an existing
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texture object. If <parameter>textures</parameter> is <constant>NULL</constant> then it is as
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if an appropriately sized array containing only zeros had been specified.
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</para>
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<para>
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With the exception that the active texture selector maintains its current value,
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<function>glBindTextures</function> is equivalent to the following pseudo code:
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</para>
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<programlisting><![CDATA[ for (i = 0; i < count; i++) {
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GLuint texture;
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if (textures == NULL) {
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texture = 0;
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} else {
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texture = textures[i];
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}
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glActiveTexture(GL_TEXTURE0 + first + i);
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if (texture != 0) {
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GLenum target = /* target of textures[i] */;
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glBindTexture(target, textures[i]);
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} else {
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for (target in all supported targets) {
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glBindTexture(target, 0);
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}
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}
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}]]></programlisting>
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<para>
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Each entry in <parameter>textures</parameter> will be checked individually and if found
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to be invalid, the state for that texture unit will not be changed and an error will be
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generated. However, the state for other texture units referenced by the command will still
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be updated.
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</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para>
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<function>glBindTextures</function> is available only if the GL version is 4.4 or higher.
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</para>
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<para>
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Note that because <function>glBindTextures</function> cannot create new textures (even if
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a name passed has been previously generated by call to <citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry>),
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names pased to <function>glBindTextures</function> must have been bound at least once previously
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via a call to <citerefentry><refentrytitle>glBindTexture</refentrytitle></citerefentry>.
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</para>
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</refsect1>
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<refsect1 id="errors"><title>Errors</title>
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<para>
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<constant>GL_INVALID_OPERATION</constant> is generated if <parameter>first</parameter> + <parameter>count</parameter> is greater
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than the number of texture image units supported by the implementation.
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</para>
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<para>
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<constant>GL_INVALID_OPERATION</constant> is generated if any value in textures is
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not zero or the name of an existing texture object.
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</para>
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</refsect1>
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<refsect1 id="associatedgets"><title>Associated Gets</title>
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<para>
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<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_TEXTURE_BINDING_1D</constant>,
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<constant>GL_TEXTURE_BINDING_2D</constant>, <constant>GL_TEXTURE_BINDING_3D</constant>, <constant>GL_TEXTURE_BINDING_1D_ARRAY</constant>,
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<constant>GL_TEXTURE_BINDING_2D_ARRAY</constant>, <constant>GL_TEXTURE_BINDING_RECTANGLE</constant>,
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<constant>GL_TEXTURE_BINDING_BUFFER</constant>, <constant>GL_TEXTURE_BINDING_CUBE_MAP</constant>, <constant>GL_TEXTURE_BINDING_CUBE_MAP</constant>,
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<constant>GL_TEXTURE_BINDING_CUBE_MAP_ARRAY</constant>,
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<constant>GL_TEXTURE_BINDING_2D_MULTISAMPLE</constant>,
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or <constant>GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY</constant>.
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</para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>glBindTexture</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDeleteTextures</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGetTexParameter</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glIsTexture</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage1D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage2DMultisample</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage3DMultisample</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexBuffer</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexParameter</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> 2013 Khronos Group.
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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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