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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>glGetProgramResourceIndex - 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="glGetProgramResourceIndex"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glGetProgramResourceIndex — query the index of a named resource within a program</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">GLuint <b class="fsfunc">glGetProgramResourceIndex</b>(</code></td><td>GLuint </td><td><var class="pdparam">program</var>, </td></tr><tr><td> </td><td>GLenum </td><td><var class="pdparam">programInterface</var>, </td></tr><tr><td> </td><td>const char * </td><td><var class="pdparam">name</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>program</code></em></span></dt><dd><p> | |
5 | The name of a program object whose resources to query. | |
6 | </p></dd><dt><span class="term"><em class="parameter"><code>programInterface</code></em></span></dt><dd><p> | |
7 | A token identifying the interface within <em class="parameter"><code>program</code></em> containing the resource named <em class="parameter"><code>name</code></em>. | |
8 | </p></dd><dt><span class="term"><em class="parameter"><code>name</code></em></span></dt><dd><p> | |
9 | The name of the resource to query the index of. | |
10 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
11 | <code class="function">glGetProgramResourceIndex</code> returns the unsigned | |
12 | integer index assigned to a resource named <em class="parameter"><code>name</code></em> in | |
13 | the interface type <em class="parameter"><code>programInterface</code></em> of program object <em class="parameter"><code>program</code></em>. | |
14 | </p><p> | |
15 | <em class="parameter"><code>program</code></em> must be the name of an existing program object. <em class="parameter"><code>programInterface</code></em> | |
16 | is the name of the interface within <em class="parameter"><code>program</code></em> which contains the resource named | |
17 | <em class="parameter"><code>name</code></em>and must be one of the following | |
18 | values: | |
19 | </p><div class="variablelist"><dl><dt><span class="term"><code class="constant">GL_UNIFORM</code></span></dt><dd><p> | |
20 | The query is targeted at the set of active uniforms within <em class="parameter"><code>program</code></em>. | |
21 | </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BLOCK</code></span></dt><dd><p> | |
22 | The query is targeted at the set of active uniform blocks within <em class="parameter"><code>program</code></em>. | |
23 | </p></dd><dt><span class="term"><code class="constant">GL_PROGRAM_INPUT</code></span></dt><dd><p> | |
24 | The query is targeted at the set of active input variables used by the first shader stage of <em class="parameter"><code>program</code></em>. | |
25 | If <em class="parameter"><code>program</code></em> contains multiple shader stages then input variables from any stage other than the first | |
26 | will not be enumerated. | |
27 | </p></dd><dt><span class="term"><code class="constant">GL_PROGRAM_OUTPUT</code></span></dt><dd><p> | |
28 | The query is targeted at the set of active output variables produced by the last shader stage of <em class="parameter"><code>program</code></em>. | |
29 | If <em class="parameter"><code>program</code></em> contains multiple shader stages then output variables from any stage other than the last | |
30 | will not be enumerated. | |
31 | </p></dd><dt><span class="term"><code class="constant">GL_VERTEX_SUBROUTINE</code>, </span><span class="term"><code class="constant">GL_TESS_CONTROL_SUBROUTINE</code>, </span><span class="term"><code class="constant">GL_TESS_EVALUATION_SUBROUTINE</code>, </span><span class="term"><code class="constant">GL_GEOMETRY_SUBROUTINE</code>, </span><span class="term"><code class="constant">GL_FRAGMENT_SUBROUTINE</code>, </span><span class="term"><code class="constant">GL_COMPUTE_SUBROUTINE</code></span></dt><dd><p> | |
32 | The query is targeted at the set of active subroutines for the vertex, tessellation control, tessellation evaluation, | |
33 | geometry, fragment and compute shader stages of <em class="parameter"><code>program</code></em>, respectively. | |
34 | </p></dd><dt><span class="term"><code class="constant">GL_VERTEX_SUBROUTINE_UNIFORM</code>, </span><span class="term"><code class="constant">GL_TESS_CONTROL_SUBROUTINE_UNIFORM</code>, </span><span class="term"><code class="constant">GL_TESS_EVALUATION_SUBROUTINE_UNIFORM</code>, </span><span class="term"><code class="constant">GL_GEOMETRY_SUBROUTINE_UNIFORM</code>, </span><span class="term"><code class="constant">GL_FRAGMENT_SUBROUTINE_UNIFORM</code>, </span><span class="term"><code class="constant">GL_COMPUTE_SUBROUTINE_UNIFORM</code></span></dt><dd><p> | |
35 | The query is targeted at the set of active subroutine uniform variables used by the vertex, tessellation control, tessellation evaluation, | |
36 | geometry, fragment and compute shader stages of <em class="parameter"><code>program</code></em>, respectively. | |
37 | </p></dd><dt><span class="term"><code class="constant">GL_TRANSFORM_FEEDBACK_VARYING</code></span></dt><dd><p> | |
38 | The query is targeted at the set of output variables from the last non-fragment stage of <em class="parameter"><code>program</code></em> that would be | |
39 | captured if transform feedback were active. | |
40 | </p></dd><dt><span class="term"><code class="constant">GL_BUFFER_VARIABLE</code></span></dt><dd><p> | |
41 | The query is targeted at the set of active buffer variables used by <em class="parameter"><code>program</code></em>. | |
42 | </p></dd><dt><span class="term"><code class="constant">GL_SHADER_STORAGE_BLOCK</code></span></dt><dd><p> | |
43 | The query is targeted at the set of active shader storage blocks used by <em class="parameter"><code>program</code></em>. | |
44 | </p></dd></dl></div><p> | |
45 | If <em class="parameter"><code>name</code></em> exactly matches the name string of one of the active resources | |
46 | for <em class="parameter"><code>programInterface</code></em>, the index of the matched resource is returned. | |
47 | Additionally, if <em class="parameter"><code>name</code></em> would exactly match the name string of an active | |
48 | resource if "[0]" were appended to <em class="parameter"><code>name</code></em>, the index of the matched | |
49 | resource is returned. Otherwise, <em class="parameter"><code>name</code></em> is considered not to be the name | |
50 | of an active resource, and <code class="constant">GL_INVALID_INDEX</code> is returned. | |
51 | </p><p> | |
52 | For the interface <code class="constant">GL_TRANSFORM_FEEDBACK_VARYING</code>, the value <code class="constant">GL_INVALID_INDEX</code> | |
53 | should be returned when querying the index assigned to the special names | |
54 | <code class="code">gl_NextBuffer</code>, <code class="code">gl_SkipComponents1</code>, <code class="code">gl_SkipComponents2</code>, | |
55 | <code class="code">gl_SkipComponents3</code>, or <code class="code">gl_SkipComponents4</code>. | |
56 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
57 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>programInterface</code></em> | |
58 | is not one of the accepted interface types. | |
59 | </p><p> | |
60 | Although not an error, <code class="constant">GL_INVALID_INDEX</code> is returned if <em class="parameter"><code>name</code></em> | |
61 | is not the name of a resource within the interface identified by <em class="parameter"><code>programInterface</code></em>. | |
62 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
63 | <a href="glGetProgramResourceName.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramResourceName</span></span></a>, | |
64 | <a href="glGetGetProgramResource.xml"><span class="citerefentry"><span class="refentrytitle">glGetGetProgramResource</span></span></a>, | |
65 | <a href="glGetProgramResourceLocation.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramResourceLocation</span></span></a>, | |
66 | <a href="glGetProgramResourceLocationIndex.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramResourceLocationIndex</span></span></a>. | |
67 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
68 | Copyright <span class="trademark"></span>© 2012 Khronos Group. | |
69 | This material may be distributed subject to the terms and conditions set forth in | |
70 | the Open Publication License, v 1.0, 8 June 1999. | |
71 | <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>. | |
72 | </p></div></div></body></html> |