| 1 | <?xml version="1.0" encoding="UTF-8"?> |
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| 4 | <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glCheckFramebufferStatus - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glCheckFramebufferStatus"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glCheckFramebufferStatus — check the completeness status of a framebuffer</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">GLenum <b class="fsfunc">glCheckFramebufferStatus</b>(</code></td><td>GLenum </td><td><var class="pdparam">target</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>target</code></em></span></dt><dd><p> |
| 5 | Specify the target of the framebuffer completeness check. |
| 6 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> |
| 7 | <code class="function">glCheckFramebufferStatus</code> queries the completeness status of the framebuffer object currently bound to <em class="parameter"><code>target</code></em>. |
| 8 | <em class="parameter"><code>target</code></em> must be <code class="constant">GL_DRAW_FRAMEBUFFER</code>, <code class="constant">GL_READ_FRAMEBUFFER</code> or <code class="constant">GL_FRAMEBUFFER</code>. |
| 9 | <code class="constant">GL_FRAMEBUFFER</code> is equivalent to <code class="constant">GL_DRAW_FRAMEBUFFER</code>. |
| 10 | </p><p> |
| 11 | The return value is <code class="constant">GL_FRAMEBUFFER_COMPLETE</code> if the framebuffer bound to <em class="parameter"><code>target</code></em> is complete. Otherwise, |
| 12 | the return value is determined as follows: |
| 13 | </p><div class="itemizedlist"><ul type="disc"><li><p> |
| 14 | <code class="constant">GL_FRAMEBUFFER_UNDEFINED</code> is returned if <em class="parameter"><code>target</code></em> is the default framebuffer, but the default framebuffer does not exist. |
| 15 | </p></li><li><p> |
| 16 | <code class="constant">GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT</code> is returned if any of the framebuffer attachment points are framebuffer incomplete. |
| 17 | </p></li><li><p> |
| 18 | <code class="constant">GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT</code> is returned if the framebuffer does not have at least one image attached to it. |
| 19 | </p></li><li><p> |
| 20 | <code class="constant">GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER</code> is returned if the value of <code class="constant">GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE</code> |
| 21 | is <code class="constant">GL_NONE</code> for any color attachment point(s) named by <code class="constant">GL_DRAWBUFFERi</code>. |
| 22 | </p></li><li><p> |
| 23 | <code class="constant">GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER</code> is returned if <code class="constant">GL_READ_BUFFER</code> is not <code class="constant">GL_NONE</code> |
| 24 | and the value of <code class="constant">GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE</code> is <code class="constant">GL_NONE</code> for the color attachment point named |
| 25 | by <code class="constant">GL_READ_BUFFER</code>. |
| 26 | </p></li><li><p> |
| 27 | <code class="constant">GL_FRAMEBUFFER_UNSUPPORTED</code> is returned if the combination of internal formats of the attached images violates |
| 28 | an implementation-dependent set of restrictions. |
| 29 | </p></li><li><p> |
| 30 | <code class="constant">GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE</code> is returned if the value of <code class="constant">GL_RENDERBUFFER_SAMPLES</code> is not the same |
| 31 | for all attached renderbuffers; if the value of <code class="constant">GL_TEXTURE_SAMPLES</code> is the not same for all attached textures; or, if the attached |
| 32 | images are a mix of renderbuffers and textures, the value of <code class="constant">GL_RENDERBUFFER_SAMPLES</code> does not match the value of |
| 33 | <code class="constant">GL_TEXTURE_SAMPLES</code>. |
| 34 | </p></li><li><p> |
| 35 | <code class="constant">GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE</code> is also returned if the value of <code class="constant">GL_TEXTURE_FIXED_SAMPLE_LOCATIONS</code> is |
| 36 | not the same for all attached textures; or, if the attached images are a mix of renderbuffers and textures, the value of <code class="constant">GL_TEXTURE_FIXED_SAMPLE_LOCATIONS</code> |
| 37 | is not <code class="constant">GL_TRUE</code> for all attached textures. |
| 38 | </p></li><li><p> |
| 39 | <code class="constant">GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS</code> is returned if any framebuffer attachment is layered, and any populated attachment is not layered, |
| 40 | or if all populated color attachments are not from textures of the same target. |
| 41 | </p></li></ul></div><p> |
| 42 | </p><p> |
| 43 | Additionally, if an error occurs, zero is returned. |
| 44 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> |
| 45 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not <code class="constant">GL_DRAW_FRAMEBUFFER</code>, |
| 46 | <code class="constant">GL_READ_FRAMEBUFFER</code> or <code class="constant">GL_FRAMEBUFFER</code>. |
| 47 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> |
| 48 | <a href="glGenFramebuffers.xml"><span class="citerefentry"><span class="refentrytitle">glGenFramebuffers</span></span></a>, |
| 49 | <a href="glDeleteFramebuffers.xml"><span class="citerefentry"><span class="refentrytitle">glDeleteFramebuffers</span></span></a> |
| 50 | <a href="glBindFramebuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindFramebuffer</span></span></a> |
| 51 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> |
| 52 | Copyright <span class="trademark"></span>© 2010 Khronos Group. |
| 53 | This material may be distributed subject to the terms and conditions set forth in |
| 54 | the Open Publication License, v 1.0, 8 June 1999. |
| 55 | <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>. |
| 56 | </p></div></div></body></html> |