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119 lines
4.9 KiB
XML
119 lines
4.9 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="glGetBufferParameteriv">
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<refmeta>
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<refmetainfo>
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<copyright>
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<year>2005</year>
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<holder>Sams Publishing</holder>
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</copyright>
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</refmetainfo>
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<refentrytitle>glGetBufferParameteriv</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glGetBufferParameteriv</refname>
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<refpurpose>return parameters of a buffer 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>glGetBufferParameteriv</function></funcdef>
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<paramdef>GLenum <parameter>target</parameter></paramdef>
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<paramdef>GLenum <parameter>value</parameter></paramdef>
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<paramdef>GLint * <parameter>data</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>target</parameter></term>
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<listitem>
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<para>
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Specifies the target buffer object.
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The symbolic constant must be <constant>GL_ARRAY_BUFFER</constant> or
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<constant>GL_ELEMENT_ARRAY_BUFFER</constant>.
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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>value</parameter></term>
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<listitem>
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<para>
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Specifies the symbolic name of a buffer object parameter.
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Accepted values are <constant>GL_BUFFER_SIZE</constant> or <constant>GL_BUFFER_USAGE</constant>.
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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>data</parameter></term>
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<listitem>
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<para>
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Returns the requested parameter.
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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>glGetBufferParameteriv</function> returns in <parameter>data</parameter> a selected parameter of the buffer object
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specified by <parameter>target</parameter>.
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</para>
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<para>
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<parameter>value</parameter> names a specific buffer object parameter, as follows:
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</para>
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<variablelist>
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<varlistentry>
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<term><constant>GL_BUFFER_SIZE</constant></term>
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<listitem>
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<para>
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<parameter>params</parameter> returns the size of the buffer object, measured in bytes.
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The initial value is 0.
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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><constant>GL_BUFFER_USAGE</constant></term>
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<listitem>
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<para>
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<parameter>params</parameter> returns the buffer object's usage pattern. The initial value is
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<constant>GL_STATIC_DRAW</constant>.
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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="notes"><title>Notes</title>
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<para>
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If an error is generated,
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no change is made to the contents of <parameter>data</parameter>.
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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_ENUM</constant> is generated if <parameter>target</parameter> or <parameter>value</parameter> is not an
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accepted value.
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</para>
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<para>
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<constant>GL_INVALID_OPERATION</constant> is generated if the reserved buffer object name 0 is bound to <parameter>target</parameter>.
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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>glBindBuffer</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glBufferData</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> 2005 Addison-Wesley.
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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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