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=
"glCheckFramebufferStatus">
9 <holder>Khronos Group
</holder>
12 <refentrytitle>glCheckFramebufferStatus
</refentrytitle>
13 <manvolnum>3G
</manvolnum>
16 <refname>glCheckFramebufferStatus
</refname>
17 <refpurpose>check the completeness status of a framebuffer
</refpurpose>
19 <refsynopsisdiv><title>C Specification
</title>
22 <funcdef>GLenum
<function>glCheckFramebufferStatus
</function></funcdef>
23 <paramdef>GLenum
<parameter>target
</parameter></paramdef>
27 <refsect1 id=
"parameters"><title>Parameters
</title>
30 <term><parameter>target
</parameter></term>
33 Specify the target of the framebuffer completeness check.
39 <refsect1 id=
"description"><title>Description
</title>
41 <function>glCheckFramebufferStatus
</function> queries the completeness status of the framebuffer object currently bound to
<parameter>target
</parameter>.
42 <parameter>target
</parameter> must be
<constant>GL_DRAW_FRAMEBUFFER
</constant>,
<constant>GL_READ_FRAMEBUFFER
</constant> or
<constant>GL_FRAMEBUFFER
</constant>.
43 <constant>GL_FRAMEBUFFER
</constant> is equivalent to
<constant>GL_DRAW_FRAMEBUFFER
</constant>.
46 The return value is
<constant>GL_FRAMEBUFFER_COMPLETE
</constant> if the framebuffer bound to
<parameter>target
</parameter> is complete. Otherwise,
47 the return value is determined as follows:
51 <constant>GL_FRAMEBUFFER_UNDEFINED
</constant> is returned if
<parameter>target
</parameter> is the default framebuffer, but the default framebuffer does not exist.
56 <constant>GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT
</constant> is returned if any of the framebuffer attachment points are framebuffer incomplete.
61 <constant>GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT
</constant> is returned if the framebuffer does not have at least one image attached to it.
66 <constant>GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER
</constant> is returned if the value of
<constant>GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE
</constant>
67 is
<constant>GL_NONE
</constant> for any color attachment point(s) named by
<constant>GL_DRAWBUFFERi
</constant>.
72 <constant>GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER
</constant> is returned if
<constant>GL_READ_BUFFER
</constant> is not
<constant>GL_NONE
</constant>
73 and the value of
<constant>GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE
</constant> is
<constant>GL_NONE
</constant> for the color attachment point named
74 by
<constant>GL_READ_BUFFER
</constant>.
79 <constant>GL_FRAMEBUFFER_UNSUPPORTED
</constant> is returned if the combination of internal formats of the attached images violates
80 an implementation-dependent set of restrictions.
85 <constant>GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE
</constant> is returned if the value of
<constant>GL_RENDERBUFFER_SAMPLES
</constant> is not the same
86 for all attached renderbuffers; if the value of
<constant>GL_TEXTURE_SAMPLES
</constant> is the not same for all attached textures; or, if the attached
87 images are a mix of renderbuffers and textures, the value of
<constant>GL_RENDERBUFFER_SAMPLES
</constant> does not match the value of
88 <constant>GL_TEXTURE_SAMPLES
</constant>.
93 <constant>GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE
</constant> is also returned if the value of
<constant>GL_TEXTURE_FIXED_SAMPLE_LOCATIONS
</constant> is
94 not the same for all attached textures; or, if the attached images are a mix of renderbuffers and textures, the value of
<constant>GL_TEXTURE_FIXED_SAMPLE_LOCATIONS
</constant>
95 is not
<constant>GL_TRUE
</constant> for all attached textures.
100 <constant>GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS
</constant> is returned if any framebuffer attachment is layered, and any populated attachment is not layered,
101 or if all populated color attachments are not from textures of the same target.
107 Additionally, if an error occurs, zero is returned.
110 <refsect1 id=
"errors"><title>Errors
</title>
112 <constant>GL_INVALID_ENUM
</constant> is generated if
<parameter>target
</parameter> is not
<constant>GL_DRAW_FRAMEBUFFER
</constant>,
113 <constant>GL_READ_FRAMEBUFFER
</constant> or
<constant>GL_FRAMEBUFFER
</constant>.
116 <refsect1 id=
"seealso"><title>See Also
</title>
118 <citerefentry><refentrytitle>glGenFramebuffers
</refentrytitle></citerefentry>,
119 <citerefentry><refentrytitle>glDeleteFramebuffers
</refentrytitle></citerefentry>
120 <citerefentry><refentrytitle>glBindFramebuffer
</refentrytitle></citerefentry>
123 <refsect1 id=
"Copyright"><title>Copyright
</title>
125 Copyright
<trademark class=
"copyright"></trademark> 2010 Khronos Group.
126 This material may be distributed subject to the terms and conditions set forth in
127 the Open Publication License, v
1.0,
8 June
1999.
128 <ulink url=
"http://opencontent.org/openpub/">http://opencontent.org/openpub/
</ulink>.