mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-28 04:15:43 +00:00
195 lines
8.9 KiB
XML
195 lines
8.9 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="glPolygonStipple">
|
||
|
|
<refmeta>
|
||
|
|
<refmetainfo>
|
||
|
|
<copyright>
|
||
|
|
<year>1991-2006</year>
|
||
|
|
<holder>Silicon Graphics, Inc.</holder>
|
||
|
|
</copyright>
|
||
|
|
</refmetainfo>
|
||
|
|
<refentrytitle>glPolygonStipple</refentrytitle>
|
||
|
|
<manvolnum>3G</manvolnum>
|
||
|
|
</refmeta>
|
||
|
|
<refnamediv>
|
||
|
|
<refname>glPolygonStipple</refname>
|
||
|
|
<refpurpose>set the polygon stippling pattern</refpurpose>
|
||
|
|
</refnamediv>
|
||
|
|
<refsynopsisdiv><title>C Specification</title>
|
||
|
|
<funcsynopsis>
|
||
|
|
<funcprototype>
|
||
|
|
<funcdef>void <function>glPolygonStipple</function></funcdef>
|
||
|
|
<paramdef>const GLubyte * <parameter>pattern</parameter></paramdef>
|
||
|
|
</funcprototype>
|
||
|
|
</funcsynopsis>
|
||
|
|
</refsynopsisdiv>
|
||
|
|
<!-- eqn: ignoring delim $$ -->
|
||
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
||
|
|
<variablelist>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>pattern</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies a pointer to a
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: 32 times 32:-->
|
||
|
|
<mml:mrow>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
<mml:mo>×</mml:mo>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
</mml:mrow>
|
||
|
|
</mml:math></inlineequation>
|
||
|
|
stipple pattern that will be unpacked
|
||
|
|
from memory in the same way that <citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry> unpacks pixels.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
</variablelist>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="description"><title>Description</title>
|
||
|
|
<para>
|
||
|
|
Polygon stippling,
|
||
|
|
like line stippling
|
||
|
|
(see <citerefentry><refentrytitle>glLineStipple</refentrytitle></citerefentry>),
|
||
|
|
masks out certain fragments produced by rasterization,
|
||
|
|
creating a pattern.
|
||
|
|
Stippling is independent of polygon antialiasing.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<parameter>pattern</parameter> is a pointer to a
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: 32 times 32:-->
|
||
|
|
<mml:mrow>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
<mml:mo>×</mml:mo>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
</mml:mrow>
|
||
|
|
</mml:math></inlineequation>
|
||
|
|
stipple pattern that is stored
|
||
|
|
in memory just like the pixel data supplied to a <citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry>
|
||
|
|
call with
|
||
|
|
<emphasis></emphasis>
|
||
|
|
height
|
||
|
|
and
|
||
|
|
<emphasis>width</emphasis>
|
||
|
|
both equal to 32, a pixel format
|
||
|
|
of <constant>GL_COLOR_INDEX</constant>, and data type
|
||
|
|
of <constant>GL_BITMAP</constant>.
|
||
|
|
That is,
|
||
|
|
the stipple pattern is represented as a
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: 32 times 32:-->
|
||
|
|
<mml:mrow>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
<mml:mo>×</mml:mo>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
</mml:mrow>
|
||
|
|
</mml:math></inlineequation>
|
||
|
|
array
|
||
|
|
of 1-bit color indices packed in unsigned bytes.
|
||
|
|
<citerefentry><refentrytitle>glPixelStore</refentrytitle></citerefentry> parameters like <constant>GL_UNPACK_SWAP_BYTES</constant>
|
||
|
|
and <constant>GL_UNPACK_LSB_FIRST</constant> affect the assembling of the bits into a
|
||
|
|
stipple pattern.
|
||
|
|
Pixel transfer operations
|
||
|
|
(shift, offset, pixel map)
|
||
|
|
are not applied to the stipple image,
|
||
|
|
however.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
If a non-zero named buffer object is bound to the <constant>GL_PIXEL_UNPACK_BUFFER</constant> target
|
||
|
|
(see <citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>) while a stipple pattern is
|
||
|
|
specified, <parameter>pattern</parameter> is treated as a byte offset into the buffer object's data store.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
To enable and disable polygon stippling, call
|
||
|
|
<citerefentry><refentrytitle>glEnable</refentrytitle></citerefentry> and <citerefentry><refentrytitle>glDisable</refentrytitle></citerefentry>
|
||
|
|
with argument <constant>GL_POLYGON_STIPPLE</constant>. Polygon stippling is initially
|
||
|
|
disabled. If it's enabled,
|
||
|
|
a rasterized polygon fragment with window coordinates
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: x sub w:-->
|
||
|
|
<mml:msub><mml:mi mathvariant="italic">x</mml:mi>
|
||
|
|
<mml:mi mathvariant="italic">w</mml:mi>
|
||
|
|
</mml:msub>
|
||
|
|
</mml:math></inlineequation>
|
||
|
|
and
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: y sub w:-->
|
||
|
|
<mml:msub><mml:mi mathvariant="italic">y</mml:mi>
|
||
|
|
<mml:mi mathvariant="italic">w</mml:mi>
|
||
|
|
</mml:msub>
|
||
|
|
</mml:math></inlineequation>
|
||
|
|
is sent to the next stage of the GL if and only if the
|
||
|
|
(<inlineequation><mml:math>
|
||
|
|
<!-- eqn: x sub w mod 32:-->
|
||
|
|
<mml:mrow>
|
||
|
|
<mml:msub><mml:mi mathvariant="italic">x</mml:mi>
|
||
|
|
<mml:mi mathvariant="italic">w</mml:mi>
|
||
|
|
</mml:msub>
|
||
|
|
<mml:mo>%</mml:mo>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
</mml:mrow>
|
||
|
|
</mml:math></inlineequation>)th
|
||
|
|
bit in the
|
||
|
|
(<inlineequation><mml:math>
|
||
|
|
<!-- eqn: y sub w mod 32:-->
|
||
|
|
<mml:mrow>
|
||
|
|
<mml:msub><mml:mi mathvariant="italic">y</mml:mi>
|
||
|
|
<mml:mi mathvariant="italic">w</mml:mi>
|
||
|
|
</mml:msub>
|
||
|
|
<mml:mo>%</mml:mo>
|
||
|
|
<mml:mn>32</mml:mn>
|
||
|
|
</mml:mrow>
|
||
|
|
</mml:math></inlineequation>)th
|
||
|
|
row
|
||
|
|
of the stipple pattern is 1 (one).
|
||
|
|
When polygon stippling is disabled, it is as if the stipple pattern
|
||
|
|
consists of all 1's.
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="errors"><title>Errors</title>
|
||
|
|
<para>
|
||
|
|
<constant>GL_INVALID_OPERATION</constant> is generated if a non-zero buffer object name is bound to the
|
||
|
|
<constant>GL_PIXEL_UNPACK_BUFFER</constant> target and the buffer object's data store is currently mapped.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GL_INVALID_OPERATION</constant> is generated if a non-zero buffer object name is bound to the
|
||
|
|
<constant>GL_PIXEL_UNPACK_BUFFER</constant> target and the data would be unpacked from the buffer
|
||
|
|
object such that the memory reads required would exceed the data store size.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GL_INVALID_OPERATION</constant> is generated if <function>glPolygonStipple</function>
|
||
|
|
is executed between the execution of <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry>
|
||
|
|
and the corresponding execution of <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>.
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="associatedgets"><title>Associated Gets</title>
|
||
|
|
<para>
|
||
|
|
<citerefentry><refentrytitle>glGetPolygonStipple</refentrytitle></citerefentry>
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<citerefentry><refentrytitle>glIsEnabled</refentrytitle></citerefentry> with argument <constant>GL_POLYGON_STIPPLE</constant>
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_PIXEL_UNPACK_BUFFER_BINDING</constant>
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="seealso"><title>See Also</title>
|
||
|
|
<para>
|
||
|
|
<citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>glLineStipple</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>glPixelStore</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>glPixelTransfer</refentrytitle></citerefentry>
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="Copyright"><title>Copyright</title>
|
||
|
|
<para>
|
||
|
|
Copyright <trademark class="copyright"></trademark> 1991-2006
|
||
|
|
Silicon Graphics, Inc. This document is licensed under the SGI
|
||
|
|
Free Software B License. For details, see
|
||
|
|
<ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
</refentry>
|