mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-25 14:25:39 +00:00
276 lines
16 KiB
XML
276 lines
16 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
|
|
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
|
|
<refentry id="glVertexAttribPointer">
|
|
<refentryinfo>
|
|
<copyright>
|
|
<year>2003-2005</year>
|
|
<holder>3Dlabs Inc. Ltd.</holder>
|
|
</copyright>
|
|
<copyright>
|
|
<year>2010-2013</year>
|
|
<holder>Khronos Group</holder>
|
|
</copyright>
|
|
</refentryinfo>
|
|
<refmeta>
|
|
<refentrytitle>glVertexAttribPointer</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glVertexAttribPointer</refname>
|
|
<refpurpose>define an array of generic vertex attribute data</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glVertexAttribPointer</function></funcdef>
|
|
<paramdef>GLuint <parameter>index</parameter></paramdef>
|
|
<paramdef>GLint <parameter>size</parameter></paramdef>
|
|
<paramdef>GLenum <parameter>type</parameter></paramdef>
|
|
<paramdef>GLboolean <parameter>normalized</parameter></paramdef>
|
|
<paramdef>GLsizei <parameter>stride</parameter></paramdef>
|
|
<paramdef>const GLvoid * <parameter>pointer</parameter></paramdef>
|
|
</funcprototype>
|
|
<funcprototype>
|
|
<funcdef>void <function>glVertexAttribIPointer</function></funcdef>
|
|
<paramdef>GLuint <parameter>index</parameter></paramdef>
|
|
<paramdef>GLint <parameter>size</parameter></paramdef>
|
|
<paramdef>GLenum <parameter>type</parameter></paramdef>
|
|
<paramdef>GLsizei <parameter>stride</parameter></paramdef>
|
|
<paramdef>const GLvoid * <parameter>pointer</parameter></paramdef>
|
|
</funcprototype>
|
|
<funcprototype>
|
|
<funcdef>void <function>glVertexAttribLPointer</function></funcdef>
|
|
<paramdef>GLuint <parameter>index</parameter></paramdef>
|
|
<paramdef>GLint <parameter>size</parameter></paramdef>
|
|
<paramdef>GLenum <parameter>type</parameter></paramdef>
|
|
<paramdef>GLsizei <parameter>stride</parameter></paramdef>
|
|
<paramdef>const GLvoid * <parameter>pointer</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>index</parameter></term>
|
|
<listitem>
|
|
<para>Specifies the index of the generic vertex
|
|
attribute to be modified.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>size</parameter></term>
|
|
<listitem>
|
|
<para>Specifies the number of components per
|
|
generic vertex attribute. Must
|
|
be 1, 2, 3, 4. Additionally, the symbolic constant <constant>GL_BGRA</constant>
|
|
is accepted by <function>glVertexAttribPointer</function>. The initial value is 4.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>type</parameter></term>
|
|
<listitem>
|
|
<para>Specifies the data type of each component in
|
|
the array. The symbolic constants
|
|
<constant>GL_BYTE</constant>,
|
|
<constant>GL_UNSIGNED_BYTE</constant>,
|
|
<constant>GL_SHORT</constant>,
|
|
<constant>GL_UNSIGNED_SHORT</constant>,
|
|
<constant>GL_INT</constant>, and
|
|
<constant>GL_UNSIGNED_INT</constant> are accepted by <function>glVertexAttribPointer</function> and <function>glVertexAttribIPointer</function>. Additionally
|
|
<constant>GL_HALF_FLOAT</constant>,
|
|
<constant>GL_FLOAT</constant>,
|
|
<constant>GL_DOUBLE</constant>,
|
|
<constant>GL_FIXED</constant>,
|
|
<constant>GL_INT_2_10_10_10_REV</constant>,
|
|
<constant>GL_UNSIGNED_INT_2_10_10_10_REV</constant> and
|
|
<constant>GL_UNSIGNED_INT_10F_11F_11F_REV</constant> are accepted by <function>glVertexAttribPointer</function>.
|
|
<constant>GL_DOUBLE</constant> is also accepted by <function>glVertexAttribLPointer</function> and is
|
|
the only token accepted by the <parameter>type</parameter> parameter for that function.
|
|
The initial value is <constant>GL_FLOAT</constant>.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>normalized</parameter></term>
|
|
<listitem>
|
|
<para>For <function>glVertexAttribPointer</function>, specifies whether fixed-point data values
|
|
should be normalized (<constant>GL_TRUE</constant>)
|
|
or converted directly as fixed-point values
|
|
(<constant>GL_FALSE</constant>) when they are
|
|
accessed.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>stride</parameter></term>
|
|
<listitem>
|
|
<para>Specifies the byte offset between consecutive
|
|
generic vertex attributes. If <parameter>stride</parameter>
|
|
is 0, the generic vertex attributes are
|
|
understood to be tightly packed in the
|
|
array. The initial value is 0.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>pointer</parameter></term>
|
|
<listitem>
|
|
<para>Specifies a offset of the first component of the first generic vertex attribute in the array in the data store of the
|
|
buffer currently bound to the <constant>GL_ARRAY_BUFFER</constant> target. The initial value is 0.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 id="description"><title>Description</title>
|
|
<para>
|
|
<function>glVertexAttribPointer</function>, <function>glVertexAttribIPointer</function> and <function>glVertexAttribLPointer</function>
|
|
specify the
|
|
location and data format of the array of generic vertex attributes at index <parameter>index</parameter>
|
|
to use when rendering. <parameter>size</parameter> specifies the number of components per attribute and
|
|
must be 1, 2, 3, 4, or <constant>GL_BGRA</constant>. <parameter>type</parameter> specifies the data type
|
|
of each component, and <parameter>stride</parameter> specifies the byte stride from one attribute to the next,
|
|
allowing vertices and attributes to be packed into a single array or stored in separate arrays.
|
|
</para>
|
|
<para>
|
|
For <function>glVertexAttribPointer</function>, if <parameter>normalized</parameter> is set to <constant>GL_TRUE</constant>,
|
|
it indicates that values stored in an integer format are to be mapped to the range [-1,1] (for signed values) or [0,1] (for
|
|
unsigned values) when they are accessed and converted to floating point. Otherwise, values will
|
|
be converted to floats directly without normalization.
|
|
</para>
|
|
<para>
|
|
For <function>glVertexAttribIPointer</function>, only the integer types <constant>GL_BYTE</constant>,
|
|
<constant>GL_UNSIGNED_BYTE</constant>, <constant>GL_SHORT</constant>, <constant>GL_UNSIGNED_SHORT</constant>,
|
|
<constant>GL_INT</constant>, <constant>GL_UNSIGNED_INT</constant> are accepted. Values are always left as integer values.
|
|
</para>
|
|
<para>
|
|
<function>glVertexAttribLPointer</function> specifies state for a generic vertex attribute array associated
|
|
with a shader attribute variable declared with 64-bit double precision components. <parameter>type</parameter>
|
|
must be <constant>GL_DOUBLE</constant>. <parameter>index</parameter>, <parameter>size</parameter>, and
|
|
<parameter>stride</parameter> behave as described for <function>glVertexAttribPointer</function> and
|
|
<function>glVertexAttribIPointer</function>.
|
|
</para>
|
|
<para>
|
|
If <parameter>pointer</parameter> is not <code>NULL</code>, a non-zero named buffer object must be bound to the
|
|
<constant>GL_ARRAY_BUFFER</constant> target (see <citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>),
|
|
otherwise an error is generated. <parameter>pointer</parameter> is treated as a byte offset into the buffer object's data store.
|
|
The buffer object binding (<constant>GL_ARRAY_BUFFER_BINDING</constant>) is saved as generic vertex attribute array
|
|
state (<constant>GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING</constant>) for index <parameter>index</parameter>.
|
|
</para>
|
|
<para>
|
|
When a generic vertex attribute array is specified,
|
|
<parameter>size</parameter>, <parameter>type</parameter>,
|
|
<parameter>normalized</parameter>,
|
|
<parameter>stride</parameter>, and
|
|
<parameter>pointer</parameter> are saved as vertex array
|
|
state, in addition to the current vertex array buffer object binding.
|
|
</para>
|
|
|
|
<para>
|
|
To enable and disable a generic vertex attribute array, call
|
|
<citerefentry><refentrytitle>glEnableVertexAttribArray</refentrytitle></citerefentry> and
|
|
<citerefentry><refentrytitle>glDisableVertexAttribArray</refentrytitle></citerefentry> with <parameter>index</parameter>.
|
|
If enabled, the generic vertex attribute array is used when <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>, or <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>
|
|
is called.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="notes"><title>Notes</title>
|
|
<para>
|
|
Each generic vertex attribute array is initially disabled and isn't accessed when
|
|
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or <citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>
|
|
is called.
|
|
</para>
|
|
<para>
|
|
<constant>GL_UNSIGNED_INT_10F_11F_11F_REV</constant> is accepted for <parameter>type</parameter>
|
|
only if the GL version is 4.4 or higher.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="errors"><title>Errors</title>
|
|
<para><constant>GL_INVALID_VALUE</constant> is generated if
|
|
<parameter>index</parameter> is greater than or equal to
|
|
<constant>GL_MAX_VERTEX_ATTRIBS</constant>.</para>
|
|
|
|
<para><constant>GL_INVALID_VALUE</constant> is generated if
|
|
<parameter>size</parameter> is not 1, 2, 3, 4 or (for <function>glVertexAttribPointer</function>),
|
|
<constant>GL_BGRA</constant>.</para>
|
|
|
|
<para><constant>GL_INVALID_ENUM</constant> is generated if
|
|
<parameter>type</parameter> is not an accepted value.</para>
|
|
|
|
<para><constant>GL_INVALID_VALUE</constant> is generated if
|
|
<parameter>stride</parameter> is negative.</para>
|
|
|
|
<para><constant>GL_INVALID_OPERATION</constant> is generated if <parameter>size</parameter>
|
|
is <constant>GL_BGRA</constant> and <parameter>type</parameter> is not <constant>GL_UNSIGNED_BYTE</constant>,
|
|
<constant>GL_INT_2_10_10_10_REV</constant> or <constant>GL_UNSIGNED_INT_2_10_10_10_REV</constant>.</para>
|
|
|
|
<para><constant>GL_INVALID_OPERATION</constant> is generated if <parameter>type</parameter>
|
|
is <constant>GL_INT_2_10_10_10_REV</constant> or <constant>GL_UNSIGNED_INT_2_10_10_10_REV</constant>
|
|
and <parameter>size</parameter> is not 4 or <constant>GL_BGRA</constant>.</para>
|
|
|
|
<para><constant>GL_INVALID_OPERATION</constant> is generated if <parameter>type</parameter>
|
|
is <constant>GL_UNSIGNED_INT_10F_11F_11F_REV</constant> and <parameter>size</parameter>
|
|
is not 3.</para>
|
|
|
|
<para><constant>GL_INVALID_OPERATION</constant> is generated by <function>glVertexAttribPointer</function>
|
|
if <parameter>size</parameter> is <constant>GL_BGRA</constant> and <parameter>noramlized</parameter>
|
|
is <constant>GL_FALSE</constant>.</para>
|
|
|
|
<para><constant>GL_INVALID_OPERATION</constant> is generated if zero is bound to the
|
|
<constant>GL_ARRAY_BUFFER</constant> buffer object binding point and the
|
|
<parameter>pointer</parameter> argument is not <constant>NULL</constant>.</para>
|
|
</refsect1>
|
|
<refsect1 id="associatedgets"><title>Associated Gets</title>
|
|
<para><citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>
|
|
with argument <constant>GL_MAX_VERTEX_ATTRIBS</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry>
|
|
with arguments <parameter>index</parameter> and <constant>GL_VERTEX_ATTRIB_ARRAY_ENABLED</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry>
|
|
with arguments <parameter>index</parameter> and <constant>GL_VERTEX_ATTRIB_ARRAY_SIZE</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry>
|
|
with arguments <parameter>index</parameter> and <constant>GL_VERTEX_ATTRIB_ARRAY_TYPE</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry>
|
|
with arguments <parameter>index</parameter> and <constant>GL_VERTEX_ATTRIB_ARRAY_NORMALIZED</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry>
|
|
with arguments <parameter>index</parameter> and <constant>GL_VERTEX_ATTRIB_ARRAY_STRIDE</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry>
|
|
with arguments <parameter>index</parameter> and <constant>GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument
|
|
<constant>GL_ARRAY_BUFFER_BINDING</constant></para>
|
|
|
|
<para><citerefentry><refentrytitle>glGetVertexAttribPointerv</refentrytitle></citerefentry>
|
|
with arguments <parameter>index</parameter> and
|
|
<constant>GL_VERTEX_ATTRIB_ARRAY_POINTER</constant></para>
|
|
</refsect1>
|
|
<refsect1 id="seealso"><title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glBindAttribLocation</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDisableVertexAttribArray</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glEnableVertexAttribArray</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glVertexAttrib</refentrytitle></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="Copyright"><title>Copyright</title>
|
|
<para>
|
|
Copyright <trademark class="copyright"></trademark> 2003-2005 3Dlabs Inc. Ltd.
|
|
Copyright <trademark class="copyright"></trademark> 2010-2013 Khronos Group.
|
|
This material may be distributed subject to the terms and conditions set forth in
|
|
the Open Publication License, v 1.0, 8 June 1999.
|
|
<ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|