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124 lines
6.6 KiB
XML
124 lines
6.6 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="glInvalidateFramebuffer">
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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>glInvalidateFramebuffer</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glInvalidateFramebuffer</refname>
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<refpurpose>invalidate the content some or all of a framebuffer object's attachments</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>glInvalidateFramebuffer</function></funcdef>
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<paramdef>GLenum <parameter>target</parameter></paramdef>
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<paramdef>GLsizei <parameter>numAttachments</parameter></paramdef>
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<paramdef>const GLenum * <parameter>attachments</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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The target to which the framebuffer is attached. <parameter>target</parameter> must be
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<constant>GL_FRAMEBUFFER</constant>, <constant>GL_DRAW_FRAMEBUFFER</constant>, or <constant>GL_READ_FRAMEBUFFER</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>numAttachments</parameter></term>
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<listitem>
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<para>
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The number of entries in the <parameter>attachments</parameter> array.
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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>attachments</parameter></term>
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<listitem>
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<para>
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The address of an array identifying the attachments to be invalidated.
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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>glInvalidateFramebuffer</function> invalidates the content
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of a specified set of attachments of a framebuffer. The framebuffer
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whose content to invalidate is indicated by setting <parameter>target</parameter>
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to the target to which it is bound. <parameter>target</parameter> may be
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<constant>GL_FRAMEBUFFER</constant>, <constant>GL_READ_FRAMEBUFFER</constant> or
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<constant>GL_DRAW_FRAMEBUFFER</constant>. <constant>GL_FRAMEBUFFER</constant>
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is treated as if it were <constant>GL_DRAW_FRAMEBUFFER</constant>.
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</para>
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<para>
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The set of attachments whose content to invalidate are specified in an array whose address is given
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by <parameter>attachments</parameter> and which contains <parameter>numAttachments</parameter>
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elements. The elements of <parameter>attachments</parameter> must be
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<constant>GL_DEPTH_ATTACHMENT</constant>, <constant>GL_STENCIL_ATTACHMENT</constant>
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<constant>GL_DEPTH_STENCIL_ATTACHMENT</constant>, or <constant>GL_COLOR_ATTACHMENT</constant><emphasis>i</emphasis>,
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where <emphasis>i</emphasis> is between zero and the value of <constant>GL_MAX_FRAMEBUFFER_ATTACHMENTS</constant> minus one.
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Furthermore, if the default framebuffer is bound to <parameter>target</parameter>, then
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<parameter>attachments</parameter> may contain <constant>GL_FRONT_LEFT</constant>,
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<constant>GL_FRONT_RIGHT</constant>, <constant>GL_BACK_LEFT</constant>, <constant>GL_BACK_RIGHT</constant>,
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<constant>GL_AUX</constant><emphasis>i</emphasis>, <constant>GL_ACCUM</constant>,
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<constant>GL_COLOR</constant>, <constant>GL_DEPTH</constant>, or <constant>GL_STENCIL</constant>, identifying that specific buffer.
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<constant>GL_COLOR</constant>, is treated as <constant>GL_BACK_LEFT</constant> for a double-buffered context and
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<constant>GL_FRONT_LEFT</constant> for a single-buffered context.
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After <function>glInvalidateFramebuffer</function> is executed, the contents
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of the specified attachments become undefined.
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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> is not one of the
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accepted framebuffer target tokens.
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</para>
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<para>
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<constant>GL_INVALID_ENUM</constant> is generated if any element of <parameter>attachments</parameter> is
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not one of the accepted framebuffer attachment tokens.
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</para>
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<para>
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<constant>GL_INVALID_OPERATION</constant> is generated if element of <parameter>attachments</parameter> is
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<constant>GL_COLOR_ATTACHMENT</constant><emphasis>i</emphasis> where <emphasis>i</emphasis> is greater than or equal
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to the value of <constant>GL_MAX_COLOR_ATTACHMENTS</constant>.
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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_MAX_COLOR_ATTACHMENTS</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>glInvalidateTexSubImage</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glInvalidateTexImage</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glInvalidateBufferSubData</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glInvalidateBufferData</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glInvalidateSubFramebuffer</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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