mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-26 05:25:35 +00:00
377 lines
20 KiB
XML
377 lines
20 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="glWindowPos">
|
|
<refmeta>
|
|
<refmetainfo>
|
|
<copyright>
|
|
<year>1991-2006</year>
|
|
<holder>Silicon Graphics, Inc.</holder>
|
|
</copyright>
|
|
</refmetainfo>
|
|
<refentrytitle>glWindowPos</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glWindowPos</refname>
|
|
<refpurpose>specify the raster position in window coordinates for pixel operations</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2s</function></funcdef>
|
|
<paramdef>GLshort <parameter>x</parameter></paramdef>
|
|
<paramdef>GLshort <parameter>y</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2i</function></funcdef>
|
|
<paramdef>GLint <parameter>x</parameter></paramdef>
|
|
<paramdef>GLint <parameter>y</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2f</function></funcdef>
|
|
<paramdef>GLfloat <parameter>x</parameter></paramdef>
|
|
<paramdef>GLfloat <parameter>y</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2d</function></funcdef>
|
|
<paramdef>GLdouble <parameter>x</parameter></paramdef>
|
|
<paramdef>GLdouble <parameter>y</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3s</function></funcdef>
|
|
<paramdef>GLshort <parameter>x</parameter></paramdef>
|
|
<paramdef>GLshort <parameter>y</parameter></paramdef>
|
|
<paramdef>GLshort <parameter>z</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3i</function></funcdef>
|
|
<paramdef>GLint <parameter>x</parameter></paramdef>
|
|
<paramdef>GLint <parameter>y</parameter></paramdef>
|
|
<paramdef>GLint <parameter>z</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3f</function></funcdef>
|
|
<paramdef>GLfloat <parameter>x</parameter></paramdef>
|
|
<paramdef>GLfloat <parameter>y</parameter></paramdef>
|
|
<paramdef>GLfloat <parameter>z</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3d</function></funcdef>
|
|
<paramdef>GLdouble <parameter>x</parameter></paramdef>
|
|
<paramdef>GLdouble <parameter>y</parameter></paramdef>
|
|
<paramdef>GLdouble <parameter>z</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<!-- eqn: ignoring delim $$ -->
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>x</parameter></term>
|
|
<term><parameter>y</parameter></term>
|
|
<term><parameter>z</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specify the
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>,
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>,
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>
|
|
coordinates for the raster position.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2sv</function></funcdef>
|
|
<paramdef>const GLshort * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2iv</function></funcdef>
|
|
<paramdef>const GLint * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2fv</function></funcdef>
|
|
<paramdef>const GLfloat * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos2dv</function></funcdef>
|
|
<paramdef>const GLdouble * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3sv</function></funcdef>
|
|
<paramdef>const GLshort * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3iv</function></funcdef>
|
|
<paramdef>const GLint * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3fv</function></funcdef>
|
|
<paramdef>const GLfloat * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glWindowPos3dv</function></funcdef>
|
|
<paramdef>const GLdouble * <parameter>v</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<refsect1 id="parameters2"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>v</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies a pointer to an array of two or three elements,
|
|
specifying
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>,
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>,
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>
|
|
coordinates, respectively.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 id="description"><title>Description</title>
|
|
<para>
|
|
The GL maintains a 3D position in window coordinates. This position,
|
|
called the raster position, is used to position pixel and bitmap write
|
|
operations. It is maintained with subpixel accuracy. See <citerefentry><refentrytitle>glBitmap</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry>, and <citerefentry><refentrytitle>glCopyPixels</refentrytitle></citerefentry>.
|
|
</para>
|
|
<para>
|
|
<function>glWindowPos2</function> specifies the
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>
|
|
and
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>
|
|
coordinates, while
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>
|
|
is
|
|
implicitly set to 0. <function>glWindowPos3</function> specifies all three coordinates.
|
|
The
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">w</mml:mi></mml:math></inlineequation>
|
|
coordinate of the current raster position is always set to 1.0.
|
|
</para>
|
|
<para>
|
|
<function>glWindowPos</function> directly updates the
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">x</mml:mi></mml:math></inlineequation>
|
|
and
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">y</mml:mi></mml:math></inlineequation>
|
|
coordinates of the current raster
|
|
position with the values specified. That is, the values are neither
|
|
transformed by the current modelview and projection matrices, nor by
|
|
the viewport-to-window transform. The
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">z</mml:mi></mml:math></inlineequation>
|
|
coordinate of the current raster
|
|
position is updated in the following manner:
|
|
</para>
|
|
<para>
|
|
<informalequation><mml:math>
|
|
<!-- eqn: z = left{ lpile { n above f above {n + z * (f - n)} } lpile { if z <= 0 above if z >= 1 above {roman otherwise} }:-->
|
|
<mml:mrow>
|
|
<mml:mi mathvariant="italic">z</mml:mi>
|
|
<mml:mo>=</mml:mo>
|
|
<mml:mfenced open="{" close="">
|
|
<mml:mrow>
|
|
<mml:mtable>
|
|
<mml:mtr><mml:mtd>
|
|
<mml:mi mathvariant="italic">n</mml:mi>
|
|
</mml:mtd></mml:mtr>
|
|
<mml:mtr><mml:mtd>
|
|
<mml:mi mathvariant="italic">f</mml:mi>
|
|
</mml:mtd></mml:mtr>
|
|
<mml:mtr><mml:mtd>
|
|
<mml:mfenced open="" close="">
|
|
<mml:mrow>
|
|
<mml:mi mathvariant="italic">n</mml:mi>
|
|
<mml:mo>+</mml:mo>
|
|
<mml:mrow>
|
|
<mml:mi mathvariant="italic">z</mml:mi>
|
|
<mml:mo>×</mml:mo>
|
|
<mml:mfenced open="(" close=")">
|
|
<mml:mrow>
|
|
<mml:mi mathvariant="italic">f</mml:mi>
|
|
<mml:mo>-</mml:mo>
|
|
<mml:mi mathvariant="italic">n</mml:mi>
|
|
</mml:mrow>
|
|
</mml:mfenced>
|
|
</mml:mrow>
|
|
</mml:mrow>
|
|
</mml:mfenced>
|
|
</mml:mtd></mml:mtr>
|
|
</mml:mtable>
|
|
<mml:mo>⁢</mml:mo>
|
|
<mml:mtable>
|
|
<mml:mtr><mml:mtd>
|
|
<mml:mrow>
|
|
<mml:mrow>
|
|
<mml:mi mathvariant="italic">if</mml:mi>
|
|
<mml:mo>⁢</mml:mo>
|
|
<mml:mi mathvariant="italic">z</mml:mi>
|
|
</mml:mrow>
|
|
<mml:mo><=</mml:mo>
|
|
<mml:mn>0</mml:mn>
|
|
</mml:mrow>
|
|
</mml:mtd></mml:mtr>
|
|
<mml:mtr><mml:mtd>
|
|
<mml:mrow>
|
|
<mml:mrow>
|
|
<mml:mi mathvariant="italic">if</mml:mi>
|
|
<mml:mo>⁢</mml:mo>
|
|
<mml:mi mathvariant="italic">z</mml:mi>
|
|
</mml:mrow>
|
|
<mml:mo>>=</mml:mo>
|
|
<mml:mn>1</mml:mn>
|
|
</mml:mrow>
|
|
</mml:mtd></mml:mtr>
|
|
<mml:mtr><mml:mtd>
|
|
<mml:mfenced open="" close="">
|
|
<mml:mi mathvariant="normal">otherwise</mml:mi>
|
|
</mml:mfenced>
|
|
</mml:mtd></mml:mtr>
|
|
</mml:mtable>
|
|
</mml:mrow>
|
|
</mml:mfenced>
|
|
</mml:mrow>
|
|
</mml:math></informalequation>
|
|
</para>
|
|
<para>
|
|
</para>
|
|
<para>
|
|
where
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">n</mml:mi></mml:math></inlineequation>
|
|
is <constant>GL_DEPTH_RANGE</constant>'s near value, and
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">f</mml:mi></mml:math></inlineequation>
|
|
is
|
|
<constant>GL_DEPTH_RANGE</constant>'s far value. See <citerefentry><refentrytitle>glDepthRange</refentrytitle></citerefentry>.
|
|
</para>
|
|
<para>
|
|
The specified coordinates are not clip-tested, causing the raster position
|
|
to always be valid.
|
|
</para>
|
|
<para>
|
|
The current raster position also includes some associated color data and
|
|
texture coordinates. If lighting is enabled, then
|
|
<constant>GL_CURRENT_RASTER_COLOR</constant> (in RGBA mode) or <constant>GL_CURRENT_RASTER_INDEX</constant>
|
|
(in color index mode) is set to the color produced by the lighting
|
|
calculation (see <citerefentry><refentrytitle>glLight</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glLightModel</refentrytitle></citerefentry>, and <citerefentry><refentrytitle>glShadeModel</refentrytitle></citerefentry>).
|
|
If lighting is disabled, current color (in RGBA mode, state variable
|
|
<constant>GL_CURRENT_COLOR</constant>) or color index (in color index mode, state variable
|
|
<constant>GL_CURRENT_INDEX</constant>) is used to update the current raster color.
|
|
<constant>GL_CURRENT_RASTER_SECONDARY_COLOR</constant> (in RGBA mode) is likewise updated.
|
|
</para>
|
|
<para>
|
|
Likewise, <constant>GL_CURRENT_RASTER_TEXTURE_COORDS</constant> is updated as a function of
|
|
<constant>GL_CURRENT_TEXTURE_COORDS</constant>, based on the texture matrix and the texture
|
|
generation functions (see <citerefentry><refentrytitle>glTexGen</refentrytitle></citerefentry>). The
|
|
<constant>GL_CURRENT_RASTER_DISTANCE</constant> is set to the <constant>GL_CURRENT_FOG_COORD</constant>.
|
|
</para>
|
|
<para>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="notes"><title>Notes</title>
|
|
<para>
|
|
<function>glWindowPos</function> is available only if the GL version is 1.4 or greater.
|
|
</para>
|
|
<para>
|
|
The raster position is modified by <citerefentry><refentrytitle>glRasterPos</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glBitmap</refentrytitle></citerefentry>, and
|
|
<function>glWindowPos</function>.
|
|
</para>
|
|
<para>
|
|
Calling <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>, or <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> may leave the
|
|
current color or index indeterminate.
|
|
If <function>glWindowPos</function> is executed while the current color or index is indeterminate, the
|
|
current raster color or current raster index remains indeterminate.
|
|
</para>
|
|
<para>
|
|
There are distinct raster texture coordinates for each texture unit. Each
|
|
texture unit's current raster texture coordinates are updated by <function>glWindowPos</function>.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="errors"><title>Errors</title>
|
|
<para>
|
|
<constant>GL_INVALID_OPERATION</constant> is generated if <function>glWindowPos</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>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_RASTER_POSITION</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_RASTER_POSITION_VALID</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_RASTER_DISTANCE</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_RASTER_COLOR</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_RASTER_SECONDARY_COLOR</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_RASTER_INDEX</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_CURRENT_RASTER_TEXTURE_COORDS</constant>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="seealso"><title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glBitmap</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCopyPixels</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMultiTexCoord</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glRasterPos</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexCoord</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexGen</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glVertex</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>
|