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337 lines
13 KiB
XML
337 lines
13 KiB
XML
<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
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<!-- Converted by db4-upgrade version 1.1 -->
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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glGetProgramiv">
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<info>
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<copyright>
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<year>2003-2005</year>
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<holder>3Dlabs Inc. Ltd.</holder>
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</copyright>
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<copyright>
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<year>2010-2014</year>
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<holder>Khronos Group</holder>
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</copyright>
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</info>
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<refmeta>
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<refentrytitle>glGetProgramiv</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glGetProgramiv</refname>
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<refpurpose>Returns a parameter from a program object</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glGetProgramiv</function></funcdef>
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<paramdef>GLuint <parameter>program</parameter></paramdef>
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<paramdef>GLenum <parameter>pname</parameter></paramdef>
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<paramdef>GLint *<parameter>params</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1 xml:id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>program</parameter></term>
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<listitem>
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<para>Specifies the program object to be
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queried.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>pname</parameter></term>
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<listitem>
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<para>Specifies the object parameter. Accepted
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symbolic names are
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<constant>GL_ACTIVE_ATTRIBUTES</constant>,
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<constant>GL_ACTIVE_ATTRIBUTE_MAX_LENGTH</constant>,
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<constant>GL_ACTIVE_UNIFORMS</constant>,
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<constant>GL_ACTIVE_UNIFORM_BLOCKS</constant>,
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<constant>GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH</constant>,
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<constant>GL_ACTIVE_UNIFORM_MAX_LENGTH</constant>,
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<constant>GL_ATTACHED_SHADERS</constant>,
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<constant>GL_DELETE_STATUS</constant>,
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<constant>GL_INFO_LOG_LENGTH</constant>,
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<constant>GL_LINK_STATUS</constant>,
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<constant>GL_PROGRAM_BINARY_RETRIEVABLE_HINT</constant>,
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<constant>GL_TRANSFORM_FEEDBACK_BUFFER_MODE</constant>,
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<constant>GL_TRANSFORM_FEEDBACK_VARYINGS</constant>,
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<constant>GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH</constant> and
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<constant>GL_VALIDATE_STATUS</constant>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>params</parameter></term>
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<listitem>
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<para>Returns the requested object parameter.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 xml:id="description"><title>Description</title>
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<para><function>glGetProgramiv</function>
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returns in <parameter>params</parameter>
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the value of a parameter for a specific program object. The following parameters are defined:</para>
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<variablelist>
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<varlistentry>
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<term><constant>GL_ACTIVE_ATTRIBUTES</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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number of active attribute variables for
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<parameter>program</parameter>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_ACTIVE_ATTRIBUTE_MAX_LENGTH</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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length of the longest active attribute name for
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<parameter>program</parameter>, including the null
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termination character (i.e., the size of the
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character buffer required to store the longest
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attribute name). If no active attributes exist, 0 is
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returned.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_ACTIVE_UNIFORM_BLOCKS</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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number of uniform blocks for <parameter>program</parameter>
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containing active uniforms.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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length of the longest active uniform block name
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for <parameter>program</parameter>, including the
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null termination character (i.e., the size of the
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character buffer required to store the longest
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uniform block name). If no active uniform
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blocks exist, 0 is returned.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_ACTIVE_UNIFORMS</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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number of active uniform variables for
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<parameter>program</parameter>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_ACTIVE_UNIFORM_MAX_LENGTH</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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length of the longest active uniform variable name
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for <parameter>program</parameter>, including the
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null termination character (i.e., the size of the
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character buffer required to store the longest
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uniform variable name). If no active uniform
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variables exist, 0 is returned.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_ATTACHED_SHADERS</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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number of shader objects attached to
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<parameter>program</parameter>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_DELETE_STATUS</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns
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<constant>GL_TRUE</constant> if
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<parameter>program</parameter> is currently flagged
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for deletion, and <constant>GL_FALSE</constant>
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otherwise.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_INFO_LOG_LENGTH</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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number of characters in the information log for
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<parameter>program</parameter> including the null
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termination character (i.e., the size of the
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character buffer required to store the information
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log). If <parameter>program</parameter> has no
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information log, a value of 0 is
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returned.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_LINK_STATUS</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns
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<constant>GL_TRUE</constant> if the last link
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operation on <parameter>program</parameter> was
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successful, and <constant>GL_FALSE</constant>
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otherwise.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_PROGRAM_BINARY_RETRIEVABLE_HINT</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the
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current value of whether the binary retrieval
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hint is enabled for <parameter>program</parameter>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_TRANSFORM_FEEDBACK_BUFFER_MODE</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns a symbolic constant
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indicating the buffer mode used when transform feedback is active.
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This may be <constant>GL_SEPARATE_ATTRIBS</constant> or
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<constant>GL_INTERLEAVED_ATTRIBS</constant>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_TRANSFORM_FEEDBACK_VARYINGS</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the number of varying
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variables to capture in transform feedback mode for the program.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns the length of the longest
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variable name to be used for transform feedback, including the null-terminator.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>GL_VALIDATE_STATUS</constant></term>
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<listitem>
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<para>
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</para>
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<para> <parameter>params</parameter> returns
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<constant>GL_TRUE</constant> or if the last
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validation operation on
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<parameter>program</parameter> was successful, and
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<constant>GL_FALSE</constant>
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otherwise.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 xml:id="notes"><title>Notes</title>
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<para>If an error is generated, no change is made to the
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contents of <parameter>params</parameter>.</para>
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</refsect1>
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<refsect1 xml:id="errors"><title>Errors</title>
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<para><constant>GL_INVALID_VALUE</constant>
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is generated if <parameter>program</parameter>
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is not a value generated by OpenGL.</para>
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<para><constant>GL_INVALID_OPERATION</constant>
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is generated if <parameter>program</parameter>
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does not refer to a program object.</para>
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<para><constant>GL_INVALID_ENUM</constant>
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is generated if <parameter>pname</parameter>
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is not an accepted value.</para>
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</refsect1>
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<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
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<para><citerefentry><refentrytitle>glGetActiveAttrib</refentrytitle></citerefentry>
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with argument <parameter>program</parameter></para>
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<para><citerefentry><refentrytitle>glGetActiveUniform</refentrytitle></citerefentry>
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with argument <parameter>program</parameter></para>
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<para><citerefentry><refentrytitle>glGetAttachedShaders</refentrytitle></citerefentry>
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with argument <parameter>program</parameter></para>
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<para><citerefentry><refentrytitle>glGetProgramInfoLog</refentrytitle></citerefentry>
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with argument <parameter>program</parameter></para>
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<para><citerefentry><refentrytitle>glIsProgram</refentrytitle></citerefentry>
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<parameter/></para>
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</refsect1>
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<refsect1 xml:id="versions">
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<title>API Version Support</title>
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<informaltable>
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<tgroup cols="4" align="left">
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
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<tbody>
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<row>
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<entry>glGetProgramiv</entry>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='es20']/*)"/>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 xml:id="seealso"><title>See Also</title>
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<para><citerefentry><refentrytitle>glAttachShader</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCreateProgram</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDeleteProgram</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGetShaderiv</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glValidateProgram</refentrytitle></citerefentry></para>
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</refsect1>
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<refsect1 xml:id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"/> 2003-2005 3Dlabs Inc. Ltd.
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Copyright <trademark class="copyright"/> 2010-2014 Khronos Group.
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This material may be distributed subject to the terms and conditions set forth in
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the Open Publication License, v 1.0, 8 June 1999.
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<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
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</para>
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</refsect1>
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</refentry>
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