mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-25 18:05:37 +00:00
235 lines
11 KiB
XML
235 lines
11 KiB
XML
<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
|
|
|
|
<!-- Converted by db4-upgrade version 1.1 -->
|
|
|
|
<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glBufferData">
|
|
<info>
|
|
<copyright>
|
|
<year>2005</year>
|
|
<holder>Sams Publishing</holder>
|
|
</copyright>
|
|
<copyright>
|
|
<year>2010-2013</year>
|
|
<holder>Khronos Group</holder>
|
|
</copyright>
|
|
</info>
|
|
<refmeta>
|
|
<refentrytitle>glBufferData</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glBufferData</refname>
|
|
<refpurpose>creates and initializes a buffer object's data store</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glBufferData</function></funcdef>
|
|
<paramdef>GLenum <parameter>target</parameter></paramdef>
|
|
<paramdef>GLsizeiptr <parameter>size</parameter></paramdef>
|
|
<paramdef>const GLvoid * <parameter>data</parameter></paramdef>
|
|
<paramdef>GLenum <parameter>usage</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<refsect1 xml:id="parameters"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>target</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the target buffer object.
|
|
The symbolic constant must be
|
|
<constant>GL_ARRAY_BUFFER</constant>,
|
|
<constant>GL_ATOMIC_COUNTER_BUFFER</constant>,
|
|
<constant>GL_COPY_READ_BUFFER</constant>,
|
|
<constant>GL_COPY_WRITE_BUFFER</constant>,
|
|
<constant>GL_DRAW_INDIRECT_BUFFER</constant>,
|
|
<constant>GL_DISPATCH_INDIRECT_BUFFER</constant>,
|
|
<constant>GL_ELEMENT_ARRAY_BUFFER</constant>,
|
|
<constant>GL_PIXEL_PACK_BUFFER</constant>,
|
|
<constant>GL_PIXEL_UNPACK_BUFFER</constant>,
|
|
<constant>GL_QUERY_BUFFER</constant>,
|
|
<constant>GL_SHADER_STORAGE_BUFFER</constant>,
|
|
<constant>GL_TEXTURE_BUFFER</constant>,
|
|
<constant>GL_TRANSFORM_FEEDBACK_BUFFER</constant>, or
|
|
<constant>GL_UNIFORM_BUFFER</constant>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>size</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the size in bytes of the buffer object's new data store.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>data</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies a pointer to data that will be copied into the data store for initialization,
|
|
or <constant>NULL</constant> if no data is to be copied.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>usage</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the expected usage pattern of the data store. The symbolic constant must be
|
|
<constant>GL_STREAM_DRAW</constant>, <constant>GL_STREAM_READ</constant>, <constant>GL_STREAM_COPY</constant>,
|
|
<constant>GL_STATIC_DRAW</constant>, <constant>GL_STATIC_READ</constant>, <constant>GL_STATIC_COPY</constant>,
|
|
<constant>GL_DYNAMIC_DRAW</constant>, <constant>GL_DYNAMIC_READ</constant>, or <constant>GL_DYNAMIC_COPY</constant>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 xml:id="description"><title>Description</title>
|
|
<para>
|
|
<function>glBufferData</function> creates a new data store for the buffer object currently bound to
|
|
<parameter>target</parameter>. Any pre-existing data store is deleted. The new data store is created with the
|
|
specified <parameter>size</parameter> in bytes and <parameter>usage</parameter>. If <parameter>data</parameter>
|
|
is not <constant>NULL</constant>, the data store is initialized with data from this pointer. In its initial
|
|
state, the new data store is not mapped, it has a <constant>NULL</constant> mapped pointer, and its mapped access
|
|
is <constant>GL_READ_WRITE</constant>.
|
|
</para>
|
|
<para>
|
|
<parameter>usage</parameter> is a hint to the GL implementation as to how a buffer object's data store will be
|
|
accessed. This enables the GL implementation to make more intelligent decisions that may significantly
|
|
impact buffer object performance. It does not, however, constrain the actual usage of the data store.
|
|
<parameter>usage</parameter> can be broken down into two parts: first, the frequency of access (modification
|
|
and usage), and second, the nature of that access. The frequency of access may be one of these:
|
|
</para>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>STREAM</term>
|
|
<listitem>
|
|
<para>
|
|
The data store contents will be modified once and used at most a few times.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>STATIC</term>
|
|
<listitem>
|
|
<para>
|
|
The data store contents will be modified once and used many times.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>DYNAMIC</term>
|
|
<listitem>
|
|
<para>
|
|
The data store contents will be modified repeatedly and used many times.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
<para>
|
|
The nature of access may be one of these:
|
|
</para>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>DRAW</term>
|
|
<listitem>
|
|
<para>
|
|
The data store contents are modified by the application, and used as the source for GL drawing and
|
|
image specification commands.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>READ</term>
|
|
<listitem>
|
|
<para>
|
|
The data store contents are modified by reading data from the GL, and used to return that data
|
|
when queried by the application.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>COPY</term>
|
|
<listitem>
|
|
<para>
|
|
The data store contents are modified by reading data from the GL, and used as the source for GL
|
|
drawing and image specification commands.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 xml:id="notes"><title>Notes</title>
|
|
<para>
|
|
If <parameter>data</parameter> is <constant>NULL</constant>, a data store of the specified size is still created,
|
|
but its contents remain uninitialized and thus undefined.
|
|
</para>
|
|
<para>
|
|
Clients must align data elements consistently with the requirements of the client
|
|
platform, with an additional base-level requirement that an offset within a buffer to
|
|
a datum comprising <inlineequation><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">N</mml:mi></mml:math></inlineequation> bytes be a
|
|
multiple of <inlineequation><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">N</mml:mi></mml:math></inlineequation>.
|
|
</para>
|
|
<para>
|
|
The <constant>GL_ATOMIC_COUNTER_BUFFER</constant> target is available only if the GL version
|
|
is 4.2 or greater.
|
|
</para>
|
|
<para>
|
|
The <constant>GL_DISPATCH_INDIRECT_BUFFER</constant> and <constant>GL_SHADER_STORAGE_BUFFER</constant> targets are available only if the GL version
|
|
is 4.3 or greater.
|
|
</para>
|
|
<para>
|
|
The <constant>GL_QUERY_BUFFER</constant> target is available only if the GL version is 4.4 or greater.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 xml:id="errors"><title>Errors</title>
|
|
<para>
|
|
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>target</parameter> is not
|
|
one of the accepted buffer targets.
|
|
</para>
|
|
<para>
|
|
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>usage</parameter> is not
|
|
<constant>GL_STREAM_DRAW</constant>, <constant>GL_STREAM_READ</constant>, <constant>GL_STREAM_COPY</constant>,
|
|
<constant>GL_STATIC_DRAW</constant>, <constant>GL_STATIC_READ</constant>, <constant>GL_STATIC_COPY</constant>,
|
|
<constant>GL_DYNAMIC_DRAW</constant>, <constant>GL_DYNAMIC_READ</constant>, or <constant>GL_DYNAMIC_COPY</constant>.
|
|
</para>
|
|
<para>
|
|
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>size</parameter> is negative.
|
|
</para>
|
|
<para>
|
|
<constant>GL_INVALID_OPERATION</constant> is generated if the reserved buffer object name 0 is bound to <parameter>target</parameter>.
|
|
</para>
|
|
<para>
|
|
<constant>GL_OUT_OF_MEMORY</constant> is generated if the GL is unable to create a data store with the specified <parameter>size</parameter>.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGetBufferSubData</refentrytitle></citerefentry>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGetBufferParameter</refentrytitle></citerefentry> with argument <constant>GL_BUFFER_SIZE</constant> or <constant>GL_BUFFER_USAGE</constant>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 xml:id="seealso"><title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glBufferSubData</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMapBuffer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glUnmapBuffer</refentrytitle></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 xml:id="Copyright"><title>Copyright</title>
|
|
<para>
|
|
Copyright <trademark class="copyright"/> 2005 Addison-Wesley.
|
|
Copyright <trademark class="copyright"/> 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.
|
|
<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|