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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title xmlns:xlink="http://www.w3.org/1999/xlink">eglCreatePlatformPixmapSurface - EGL Reference Pages</title>
<link rel="stylesheet" type="text/css" href="khronos-man.css"/>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"/>
</head>
<body>
<header/>
<div class="refentry" id="eglCreatePlatformPixmapSurface">
<div class="titlepage"/>
<div class="refnamediv">
<h2>Name</h2>
<p>eglCreatePlatformPixmapSurface —
create a new <abbr class="acronym">EGL</abbr> offscreen surface
</p>
</div>
<div class="refsynopsisdiv">
<h2>C Specification</h2>
<div class="funcsynopsis">
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">EGLSurface <strong class="fsfunc">eglCreatePlatformPixmapSurface</strong>(</code>
</td>
<td>EGLDisplay <var class="pdparam">display</var>, </td>
</tr>
<tr>
<td> </td>
<td>EGLConfig <var class="pdparam">config</var>, </td>
</tr>
<tr>
<td> </td>
<td>void * <var class="pdparam">native_pixmap</var>, </td>
</tr>
<tr>
<td> </td>
<td>EGLint const * <var class="pdparam">attrib_list</var><code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
</div>
</div>
<div class="refsect1" id="parameters">
<h2>Parameters</h2>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term">
<em class="parameter">
<code>display</code>
</em>
</span>
</dt>
<dd>
<p>Specifies the EGL display connection.</p>
</dd>
<dt>
<span class="term">
<em class="parameter">
<code>config</code>
</em>
</span>
</dt>
<dd>
<p>
Specifies the EGL frame buffer configuration that defines the
frame buffer resource available to the surface.</p>
</dd>
<dt>
<span class="term">
<em class="parameter">
<code>native_pixmap</code>
</em>
</span>
</dt>
<dd>
<p>Specifies the native pixmap.</p>
</dd>
<dt>
<span class="term">
<em class="parameter">
<code>attrib_list</code>
</em>
</span>
</dt>
<dd>
<p>
Specifies pixmap surface attributes.
May be <code class="constant">NULL</code> or empty
(first attribute is <code class="constant">EGL_NONE</code>).
</p>
</dd>
</dl>
</div>
</div>
<div class="refsect1" id="description">
<h2>Description</h2>
<p>
<code class="function">eglCreatePlatformPixmapSurface</code> creates an
off-screen <abbr class="acronym">EGL</abbr> pixmap surface and returns
a handle to it.
</p>
<p>
If <code class="function">eglCreatePlatformPixmapSurface</code> fails to
create a pixmap surface, <code class="constant">EGL_NO_SURFACE</code> is
returned.
</p>
<p>
<em class="parameter"><code>native_pixmap</code></em> must belong to the same
platform as <em class="parameter"><code>display</code></em>, and EGL considers
the returned <span class="type">EGLSurface</span> as belonging to that same
platform. The EGL extension that defines the platform to which
<em class="parameter"><code>display</code></em> belongs also defines the
requirements for the <em class="parameter"><code>native_pixmap</code></em>
parameter.
</p>
<p>
Surface attributes are specified as a list of
attribute-value pairs, terminated with
<code class="constant">EGL_NONE</code>. Accepted attributes
are:
</p>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term">
<code class="constant">EGL_GL_COLORSPACE</code>
</span>
</dt>
<dd>
<p>
Specifies the color space used by OpenGL and OpenGL ES
when rendering to the surface. If its value is
<code class="constant">EGL_GL_COLORSPACE_SRGB</code>, then a
non-linear, perceptually uniform color space is assumed,
with a corresponding
<code class="constant">GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING</code>
value of <code class="constant">GL_SRGB</code>. If its value is
<code class="constant">EGL_GL_COLORSPACE_LINEAR</code>, then a
linear color space is assumed, with a corresponding
<code class="constant">GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING</code>
value of <code class="constant">GL_LINEAR</code>. The default
value of <code class="constant">EGL_GL_COLORSPACE</code> is
<code class="constant">EGL_GL_COLORSPACE_SRGB</code>.
</p>
<p>
Note that the <code class="constant">EGL_GL_COLORSPACE</code>
attribute is used only by OpenGL and OpenGL ES contexts
supporting sRGB framebuffers. EGL itself does not
distinguish multiple colorspace models. Refer to the
``sRGB Conversion'' sections of the OpenGL 4.6 and
OpenGL ES 3.2 Specifications for more information.
</p>
</dd>
<dt>
<span class="term">
<code class="constant">EGL_VG_ALPHA_FORMAT</code>
</span>
</dt>
<dd>
<p>
Specifies how alpha values are interpreted by OpenVG
when rendering to the surface. If its value is
<code class="constant">EGL_VG_ALPHA_FORMAT_NONPRE</code>,
then alpha values are not premultipled. If its value
is <code class="constant">EGL_VG_ALPHA_FORMAT_PRE</code>,
then alpha values are premultiplied. The default
value of <code class="constant">EGL_VG_ALPHA_FORMAT</code> is
<code class="constant">EGL_VG_ALPHA_FORMAT_NONPRE</code>.
</p>
</dd>
<dt>
<span class="term">
<code class="constant">EGL_VG_COLORSPACE</code>
</span>
</dt>
<dd>
<p>
Specifies the color space used by OpenVG when
rendering to the surface. If its value is
<code class="constant">EGL_VG_COLORSPACE_sRGB</code>, then a
non-linear, perceptually uniform color space is
assumed, with a corresponding
<span class="type">VGImageFormat</span> of form
<code class="constant">VG_s*</code>. If its value is
<code class="constant">EGL_VG_COLORSPACE_LINEAR</code>, then
a linear color space is assumed, with a
corresponding <span class="type">VGImageFormat</span> of form
<code class="constant">VG_l*</code>. The default value of
<code class="constant">EGL_VG_COLORSPACE</code> is
<code class="constant">EGL_VG_COLORSPACE_sRGB</code>.
</p>
</dd>
</dl>
</div>
<p>
Any EGL rendering context that was created with respect to
<em class="parameter"><code>config</code></em> can be used to render into the
surface. Use
<a class="citerefentry" href="eglMakeCurrent.xhtml"><span class="citerefentry"><span class="refentrytitle">eglMakeCurrent</span></span></a>
to attach an EGL rendering context to the surface.
</p>
<p>
Use
<a class="citerefentry" href="eglQuerySurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglQuerySurface</span></span></a>
to retrieve the ID of <em class="parameter"><code>config</code></em>.
</p>
<p>
Use <a class="citerefentry" href="eglDestroySurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglDestroySurface</span></span></a>
to destroy the surface.
</p>
</div>
<div class="refsect1" id="notes">
<h2>Notes</h2>
<p>
The <code class="constant">EGL_MATCH_NATIVE_PIXMAP</code> attribute
of
<a class="citerefentry" href="eglChooseConfig.xhtml"><span class="citerefentry"><span class="refentrytitle">eglChooseConfig</span></span></a>
can be used to select a frame buffer configuration matching
a specified native pixmap.
</p>
<p>
Attribute <code class="constant">EGL_GL_COLORSPACE</code> is supported
only if the EGL version is 1.5 or greater.
</p>
<p>
Attributes
<code class="constant">EGL_VG_ALPHA_FORMAT</code> and
<code class="constant">EGL_VG_COLORSPACE</code>, and the
corresponding attribute values, are supported only if the
EGL version is 1.2 or greater.
</p>
<p>
The <code class="constant">EGL_VG_ALPHA_FORMAT</code> and
<code class="constant">EGL_VG_COLORSPACE</code> attributes are used only
by OpenVG and EGL itself. Refer to section 11.2 of the OpenVG
1.0 specification for more information. The platform's use and
interpretation of alpha values is outside the scope of EGL.
However, the preferred behavior is for the window system to
ignore the value of <code class="constant">EGL_VG_ALPHA_FORMAT</code>.
</p>
</div>
<div class="refsect1" id="errors">
<h2>Errors</h2>
<p>
If <em class="parameter"><code>display</code></em> and
<em class="parameter"><code>native_pixmap</code></em> do not belong to the same
platform, then undefined behavior occurs.
</p>
<p>
<code class="constant">EGL_NO_SURFACE</code> is returned if creation of
the surface fails.
</p>
<p>
<code class="constant">EGL_BAD_DISPLAY</code> is generated if
<em class="parameter"><code>display</code></em> is not an EGL display connection.
</p>
<p>
<code class="constant">EGL_NOT_INITIALIZED</code> is generated if
<em class="parameter"><code>display</code></em> has not been initialized.
</p>
<p>
<code class="constant">EGL_BAD_CONFIG</code> is generated if
<em class="parameter"><code>config</code></em> is not an EGL config.
</p>
<p>
<code class="constant">EGL_BAD_NATIVE_PIXMAP</code> may be generated if
<em class="parameter"><code>native_pixmap</code></em> is not a valid native pixmap.
</p>
<p>
<code class="constant">EGL_BAD_ATTRIBUTE</code> is generated if
<em class="parameter"><code>attrib_list</code></em> contains an invalid pixmap attribute
or if an attribute value is not recognized or out of range.
</p>
<p>
<code class="constant">EGL_BAD_ALLOC</code> is generated if there is
already an <span class="type">EGLSurface</span> associated with
<em class="parameter"><code>native_pixmap</code></em> (as a result of a previous
<code class="function">eglCreatePlatformPixmapSurface</code> call).
</p>
<p>
<code class="constant">EGL_BAD_ALLOC</code> is generated if the
implementation cannot allocate resources for the new EGL window.
</p>
<p>
<code class="constant">EGL_BAD_MATCH</code> is generated if the attributes of
<em class="parameter"><code>native_pixmap</code></em> do not correspond to
<em class="parameter"><code>config</code></em> or if
<em class="parameter"><code>config</code></em> does not support rendering to pixmaps
(the <code class="constant">EGL_SURFACE_TYPE</code> attribute does not contain
<code class="constant">EGL_PIXMAP_BIT</code>).
</p>
<p>
<code class="constant">EGL_BAD_MATCH</code> is generated if
<em class="parameter"><code>config</code></em> does not support the specified
OpenVG alpha format attribute (the value of
<code class="constant">EGL_VG_ALPHA_FORMAT</code> is
<code class="constant">EGL_VG_ALPHA_FORMAT_PRE</code> and the
<code class="constant">EGL_VG_ALPHA_FORMAT_PRE_BIT</code> is not set
in the <code class="constant">EGL_SURFACE_TYPE</code> attribute of
<em class="parameter"><code>config</code></em>) or colorspace attribute (the
value of <code class="constant">EGL_VG_COLORSPACE</code> is
<code class="constant">EGL_VG_COLORSPACE_LINEAR</code> and the
<code class="constant">EGL_VG_COLORSPACE_LINEAR_IT</code> is not set
in the <code class="constant">EGL_SURFACE_TYPE</code> attribute of
<em class="parameter"><code>config</code></em>).
</p>
</div>
<div class="refsect1" id="seealso">
<h2>See Also</h2>
<p>
<a class="citerefentry" href="eglDestroySurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglDestroySurface</span></span></a>,
<a class="citerefentry" href="eglChooseConfig.xhtml"><span class="citerefentry"><span class="refentrytitle">eglChooseConfig</span></span></a>,
<a class="citerefentry" href="eglGetConfigs.xhtml"><span class="citerefentry"><span class="refentrytitle">eglGetConfigs</span></span></a>,
<a class="citerefentry" href="eglMakeCurrent.xhtml"><span class="citerefentry"><span class="refentrytitle">eglMakeCurrent</span></span></a>,
<a class="citerefentry" href="eglQuerySurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglQuerySurface</span></span></a>
</p>
</div>
<p>
</p>
<div class="refsect3" id="copyright">
<img src="KhronosLogo.jpg"/>
<p>
Copyright © 2003-2014 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.
</p>
</div>
<p>
</p>
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