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| <title xmlns:xlink="http://www.w3.org/1999/xlink">eglCreatePbufferSurface - EGL Reference Pages</title> | |
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| <header/> | |
| <div class="refentry" id="eglCreatePbufferSurface"> | |
| <div class="titlepage"/> | |
| <div class="refnamediv"> | |
| <h2>Name</h2> | |
| <p>eglCreatePbufferSurface — | |
| create a new <abbr class="acronym">EGL</abbr> pixel buffer 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">eglCreatePbufferSurface</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>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>attrib_list</code> | |
| </em> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies pixel buffer 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">eglCreatePbufferSurface</code> creates an | |
| off-screen pixel buffer surface and returns its handle. If | |
| <code class="function">eglCreatePbufferSurface</code> fails to create | |
| a pixel buffer surface, <code class="constant">EGL_NO_SURFACE</code> | |
| is returned. | |
| </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_LINEAR</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_HEIGHT</code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies the required height of the pixel buffer | |
| surface. The default value is | |
| <code class="constant">0</code>. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> | |
| <code class="constant">EGL_LARGEST_PBUFFER</code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Requests the largest available pixel buffer surface | |
| when the allocation would otherwise fail. Use | |
| <a class="citerefentry" href="eglQuerySurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglQuerySurface</span></span></a> | |
| to retrieve the dimensions of the allocated pixel | |
| buffer. The default value is | |
| <code class="constant">EGL_FALSE</code>. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> | |
| <code class="constant">EGL_MIPMAP_TEXTURE</code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies whether storage for mipmaps should be | |
| allocated. Space for mipmaps will be set aside if | |
| the attribute value is <code class="constant">EGL_TRUE</code> | |
| and <code class="constant">EGL_TEXTURE_FORMAT</code> is not | |
| <code class="constant">EGL_NO_TEXTURE</code>. The default | |
| value is <code class="constant">EGL_FALSE</code>. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> | |
| <code class="constant">EGL_TEXTURE_FORMAT</code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies the format of the texture that will be | |
| created when a pbuffer is bound to a texture map. | |
| Possible values are | |
| <code class="constant">EGL_NO_TEXTURE</code>, | |
| <code class="constant">EGL_TEXTURE_RGB</code>, and | |
| <code class="constant">EGL_TEXTURE_RGBA</code>. The default | |
| value is <code class="constant">EGL_NO_TEXTURE</code>. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> | |
| <code class="constant">EGL_TEXTURE_TARGET</code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies the target for the texture that will be | |
| created when the pbuffer is created with a texture | |
| format of <code class="constant">EGL_TEXTURE_RGB</code> or | |
| <code class="constant">EGL_TEXTURE_RGBA</code>. Possible | |
| values are <code class="constant">EGL_NO_TEXTURE</code>, or | |
| <code class="constant">EGL_TEXTURE_2D</code>. The default | |
| value is <code class="constant">EGL_NO_TEXTURE</code>. | |
| </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> | |
| <dt> | |
| <span class="term"> | |
| <code class="constant">EGL_WIDTH</code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies the required width of the pixel buffer | |
| surface. The default value is | |
| <code class="constant">0</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 dimensions of the allocated pixel buffer | |
| surface or 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> | |
| Attribute <code class="constant">EGL_GL_COLORSPACE</code>, and the | |
| <code class="constant">EGL_OPENGL_ES3_BIT</code> bit value for attribute | |
| <code class="constant">EGL_RENDERABLE_TYPE</code>, are supported only if | |
| the EGL version is 1.5 or greater. | |
| </p> | |
| <p> | |
| Attributes | |
| <code class="constant">EGL_RENDERABLE_TYPE</code>, | |
| <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> | |
| If the value of <em class="parameter"><code>config</code></em> attribute | |
| <code class="constant">EGL_TEXTURE_FORMAT</code> is not | |
| <code class="constant">EGL_NO_TEXTURE</code>, then the pbuffer width | |
| and height specify the size of the level zero texture image | |
| </p> | |
| <p> | |
| If <code class="constant">EGL_LARGEST_PBUFFER</code> is specified and | |
| if the pbuffer will be used as a texture (i.e. the value of | |
| <code class="constant">EGL_TEXTURE_TARGET</code> is | |
| <code class="constant">EGL_TEXTURE_2D</code>, and the value of | |
| <code class="constant">EGL_TEXTURE FORMAT</code> is | |
| <code class="constant">EGL_TEXTURE_RGB</code> or | |
| <code class="constant">EGL_TEXTURE_RGBA</code>), then the aspect | |
| ratio will be preserved and the new width and height will be | |
| valid sizes for the texture target (e.g. if the underlying | |
| OpenGL ES implementation does not support non-power-of-two | |
| textures, both the width and height will be a power of 2). | |
| </p> | |
| <p> | |
| The contents of the depth and stencil buffers may not be | |
| preserved when rendering a texture to the pbuffer and | |
| switching which image of the texture is rendered to (e.g., | |
| switching from rendering one mipmap level to rendering | |
| another). | |
| </p> | |
| </div> | |
| <div class="refsect1" id="errors"> | |
| <h2>Errors</h2> | |
| <p> | |
| <code class="constant">EGL_NO_SURFACE</code> is returned if creation of | |
| the context 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 frame buffer configuration. | |
| </p> | |
| <p> | |
| <code class="constant">EGL_BAD_ATTRIBUTE</code> is generated if | |
| <em class="parameter"><code>attrib_list</code></em> contains an invalid pixel | |
| buffer attribute or if an attribute value is not recognized | |
| or out of range. | |
| </p> | |
| <p> | |
| <code class="constant">EGL_BAD_ATTRIBUTE</code> is generated if | |
| <em class="parameter"><code>attrib_list</code></em> contains any of the | |
| attributes <code class="constant">EGL_MIPMAP_TEXTURE</code>, | |
| <code class="constant">EGL_TEXTURE_FORMAT</code>, or | |
| <code class="constant">EGL_TEXTURE_TARGET</code>, and | |
| <em class="parameter"><code>config</code></em> does not support OpenGL ES | |
| rendering (e.g. the EGL version is 1.2 or later, and the | |
| <code class="constant">EGL_RENDERABLE_TYPE</code> attribute of | |
| <em class="parameter"><code>config</code></em> does not include at least one | |
| of <code class="constant">EGL_OPENGL_ES_BIT</code>, | |
| <code class="constant">EGL_OPENGL_ES2_BIT</code>, or | |
| <code class="constant">EGL_OPENGL_ES3_BIT</code>), | |
| </p> | |
| <p> | |
| <code class="constant">EGL_BAD_ALLOC</code> is generated if there are not | |
| enough resources to allocate the new surface. | |
| </p> | |
| <p> | |
| <code class="constant">EGL_BAD_MATCH</code> is generated if | |
| <em class="parameter"><code>config</code></em> does not support rendering to pixel buffers | |
| (the <code class="constant">EGL_SURFACE_TYPE</code> attribute does not contain | |
| <code class="constant">EGL_PBUFFER_BIT</code>). | |
| </p> | |
| <p> | |
| <code class="constant">EGL_BAD_MATCH</code> is generated if the | |
| <code class="constant">EGL_TEXTURE_FORMAT</code> attribute is not | |
| <code class="constant">EGL_NO_TEXTURE</code>, and | |
| <code class="constant">EGL_WIDTH</code> and/or | |
| <code class="constant">EGL_HEIGHT</code> specify an invalid size | |
| (e.g., the texture size is not a power of 2, and the | |
| underlying OpenGL ES implementation does not support | |
| non-power-of-two textures). | |
| </p> | |
| <p> | |
| <code class="constant">EGL_BAD_MATCH</code> is generated if | |
| the <code class="constant">EGL_TEXTURE_FORMAT</code> attribute is | |
| <code class="constant">EGL_NO_TEXTURE</code>, and | |
| <code class="constant">EGL_TEXTURE_TARGET</code> is something other | |
| than <code class="constant">EGL_NO_TEXTURE</code>; or, | |
| <code class="constant">EGL_TEXTURE_FORMAT</code> is something other | |
| than <code class="constant">EGL_NO_TEXTURE</code>, and | |
| <code class="constant">EGL_TEXTURE_TARGET</code> is | |
| <code class="constant">EGL_NO_TEXTURE</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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