mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-27 07:25:28 +00:00
248 lines
13 KiB
XML
248 lines
13 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="gluScaleImage">
|
||
|
|
<refmeta>
|
||
|
|
<refmetainfo>
|
||
|
|
<copyright>
|
||
|
|
<year>1991-2006</year>
|
||
|
|
<holder>Silicon Graphics, Inc.</holder>
|
||
|
|
</copyright>
|
||
|
|
</refmetainfo>
|
||
|
|
<refentrytitle>gluScaleImage</refentrytitle>
|
||
|
|
<manvolnum>3G</manvolnum>
|
||
|
|
</refmeta>
|
||
|
|
<refnamediv>
|
||
|
|
<refname>gluScaleImage</refname>
|
||
|
|
<refpurpose>scale an image to an arbitrary size</refpurpose>
|
||
|
|
</refnamediv>
|
||
|
|
<refsynopsisdiv><title>C Specification</title>
|
||
|
|
<funcsynopsis>
|
||
|
|
<funcprototype>
|
||
|
|
<funcdef>GLint <function>gluScaleImage</function></funcdef>
|
||
|
|
<paramdef>GLenum <parameter>format</parameter></paramdef>
|
||
|
|
<paramdef>GLsizei <parameter>wIn</parameter></paramdef>
|
||
|
|
<paramdef>GLsizei <parameter>hIn</parameter></paramdef>
|
||
|
|
<paramdef>GLenum <parameter>typeIn</parameter></paramdef>
|
||
|
|
<paramdef>const void * <parameter>dataIn</parameter></paramdef>
|
||
|
|
<paramdef>GLsizei <parameter>wOut</parameter></paramdef>
|
||
|
|
<paramdef>GLsizei <parameter>hOut</parameter></paramdef>
|
||
|
|
<paramdef>GLenum <parameter>typeOut</parameter></paramdef>
|
||
|
|
<paramdef>GLvoid* <parameter>dataOut</parameter></paramdef>
|
||
|
|
</funcprototype>
|
||
|
|
</funcsynopsis>
|
||
|
|
</refsynopsisdiv>
|
||
|
|
<!-- eqn: ignoring delim $$ -->
|
||
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
||
|
|
<variablelist>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>format</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies the format of the pixel data.
|
||
|
|
The following symbolic values are valid:
|
||
|
|
<constant>GLU_COLOR_INDEX</constant>,
|
||
|
|
<constant>GLU_STENCIL_INDEX</constant>,
|
||
|
|
<constant>GLU_DEPTH_COMPONENT</constant>,
|
||
|
|
<constant>GLU_RED</constant>,
|
||
|
|
<constant>GLU_GREEN</constant>,
|
||
|
|
<constant>GLU_BLUE</constant>,
|
||
|
|
<constant>GLU_ALPHA</constant>,
|
||
|
|
<constant>GLU_RGB</constant>,
|
||
|
|
<constant>GLU_RGBA</constant>,
|
||
|
|
<constant>GLU_BGR</constant>,
|
||
|
|
<constant>GLU_BGRA</constant>,
|
||
|
|
<constant>GLU_LUMINANCE</constant>, and
|
||
|
|
<constant>GLU_LUMINANCE_ALPHA</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>wIn</parameter></term>
|
||
|
|
<term><parameter>hIn</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specify in pixels the width and height, respectively, of the source image.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>typeIn</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies the data type for <parameter>dataIn</parameter>. Must be one of
|
||
|
|
<constant>GLU_UNSIGNED_BYTE</constant>,
|
||
|
|
<constant>GLU_BYTE</constant>,
|
||
|
|
<constant>GLU_BITMAP</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT</constant>,
|
||
|
|
<constant>GLU_SHORT</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT</constant>,
|
||
|
|
<constant>GLU_INT</constant>,
|
||
|
|
<constant>GLU_FLOAT</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_BYTE_3_3_2</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_BYTE_2_3_3_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_6_5</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_6_5_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_4_4_4_4</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_4_4_4_4_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_5_5_1</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_1_5_5_5_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_8_8_8_8</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_8_8_8_8_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_10_10_10_2</constant>, or
|
||
|
|
<constant>GLU_UNSIGNED_INT_2_10_10_10_REV</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>dataIn</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies a pointer to the source image.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>wOut</parameter></term>
|
||
|
|
<term><parameter>hOut</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specify the width and height, respectively, in pixels of the destination image.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>typeOut</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies the data type for <parameter>dataOut</parameter>. Must be one of
|
||
|
|
<constant>GLU_UNSIGNED_BYTE</constant>,
|
||
|
|
<constant>GLU_BYTE</constant>,
|
||
|
|
<constant>GLU_BITMAP</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT</constant>,
|
||
|
|
<constant>GLU_SHORT</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT</constant>,
|
||
|
|
<constant>GLU_INT</constant>,
|
||
|
|
<constant>GLU_FLOAT</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_BYTE_3_3_2</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_BYTE_2_3_3_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_6_5</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_6_5_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_4_4_4_4</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_4_4_4_4_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_5_5_1</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_1_5_5_5_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_8_8_8_8</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_8_8_8_8_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_10_10_10_2</constant>, or
|
||
|
|
<constant>GLU_UNSIGNED_INT_2_10_10_10_REV</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>dataOut</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies a pointer to the destination image.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
</variablelist>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="description"><title>Description</title>
|
||
|
|
<para>
|
||
|
|
<function>gluScaleImage</function> scales a pixel image using the appropriate pixel store modes to
|
||
|
|
unpack data from the source image and pack data into the destination image.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
When shrinking an image, <function>gluScaleImage</function> uses a box filter to sample the source image
|
||
|
|
and create pixels for the destination image. When magnifying an image,
|
||
|
|
the pixels from the source image are linearly interpolated to create the
|
||
|
|
destination image.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
A return value of zero indicates success, otherwise a GLU error code is returned (see <citerefentry><refentrytitle>gluErrorString</refentrytitle></citerefentry>).
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
See the <citerefentry><refentrytitle>glReadPixels</refentrytitle></citerefentry> reference page for a description of
|
||
|
|
the acceptable values for the <parameter>format</parameter>, <parameter>typeIn</parameter>, and <parameter>typeOut</parameter> parameters.
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="notes"><title>Notes</title>
|
||
|
|
<para>
|
||
|
|
Formats <constant>GLU_BGR</constant>, and <constant>GLU_BGRA</constant>, and types
|
||
|
|
<constant>GLU_UNSIGNED_BYTE_3_3_2</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_BYTE_2_3_3_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_6_5</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_6_5_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_4_4_4_4</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_4_4_4_4_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_5_5_1</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_1_5_5_5_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_8_8_8_8</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_8_8_8_8_REV</constant>,
|
||
|
|
<constant>GLU_UNSIGNED_INT_10_10_10_2</constant>, and
|
||
|
|
<constant>GLU_UNSIGNED_INT_2_10_10_10_REV</constant> are only available if the GL version
|
||
|
|
is 1.2 or greater.
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="errors"><title>Errors</title>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_VALUE</constant> is returned if <parameter>wIn</parameter>, <parameter>hIn</parameter>, <parameter>wOut</parameter>, or <parameter>hOut</parameter>
|
||
|
|
is negative.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_ENUM</constant> is returned if <parameter>format</parameter>, <parameter>typeIn</parameter>, or <parameter>typeOut</parameter> is not
|
||
|
|
legal.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_OPERATION</constant> is returned if <parameter>typeIn</parameter> or <parameter>typeOut</parameter> is
|
||
|
|
<constant>GLU_UNSIGNED_BYTE_3_3_2</constant> or <constant>GLU_UNSIGNED_BYTE_2_3_3_REV</constant>
|
||
|
|
and <parameter>format</parameter> is not <constant>GLU_RGB</constant>.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_OPERATION</constant> is returned if <parameter>typeIn</parameter> or <parameter>typeOut</parameter> is
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_6_5</constant> or <constant>GLU_UNSIGNED_SHORT_5_6_5_REV</constant>
|
||
|
|
and <parameter>format</parameter> is not <constant>GLU_RGB</constant>.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_OPERATION</constant> is returned if <parameter>typeIn</parameter> or <parameter>typeOut</parameter> is
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_4_4_4_4</constant> or <constant>GLU_UNSIGNED_SHORT_4_4_4_4_REV</constant>
|
||
|
|
and <parameter>format</parameter> is neither <constant>GLU_RGBA</constant> nor <constant>GLU_BGRA</constant>.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_OPERATION</constant> is returned if <parameter>typeIn</parameter> or <parameter>typeOut</parameter> is
|
||
|
|
<constant>GLU_UNSIGNED_SHORT_5_5_5_1</constant> or <constant>GLU_UNSIGNED_SHORT_1_5_5_5_REV</constant>
|
||
|
|
and <parameter>format</parameter> is neither <constant>GLU_RGBA</constant> nor <constant>GLU_BGRA</constant>.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_OPERATION</constant> is returned if <parameter>typeIn</parameter> or <parameter>typeOut</parameter> is
|
||
|
|
<constant>GLU_UNSIGNED_INT_8_8_8_8</constant> or <constant>GLU_UNSIGNED_INT_8_8_8_8_REV</constant>
|
||
|
|
and <parameter>format</parameter> is neither <constant>GLU_RGBA</constant> nor <constant>GLU_BGRA</constant>.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GLU_INVALID_OPERATION</constant> is returned if <parameter>typeIn</parameter> or <parameter>typeOut</parameter> is
|
||
|
|
<constant>GLU_UNSIGNED_INT_10_10_10_2</constant> or <constant>GLU_UNSIGNED_INT_2_10_10_10_REV</constant>
|
||
|
|
and <parameter>format</parameter> is neither <constant>GLU_RGBA</constant> nor <constant>GLU_BGRA</constant>.
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="seealso"><title>See Also</title>
|
||
|
|
<para>
|
||
|
|
<citerefentry><refentrytitle>gluBuild1DMipmaps</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>gluBuild2DMipmaps</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>gluBuild3DMipmaps</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>gluErrorString</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>glReadPixels</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>
|