mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-27 09:55:30 +00:00
321 lines
15 KiB
XML
321 lines
15 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="glGetTexParameter">
|
||
|
|
<refmeta>
|
||
|
|
<refmetainfo>
|
||
|
|
<copyright>
|
||
|
|
<year>1991-2006</year>
|
||
|
|
<holder>Silicon Graphics, Inc.</holder>
|
||
|
|
</copyright>
|
||
|
|
</refmetainfo>
|
||
|
|
<refentrytitle>glGetTexParameter</refentrytitle>
|
||
|
|
<manvolnum>3G</manvolnum>
|
||
|
|
</refmeta>
|
||
|
|
<refnamediv>
|
||
|
|
<refname>glGetTexParameter</refname>
|
||
|
|
<refpurpose>return texture parameter values</refpurpose>
|
||
|
|
</refnamediv>
|
||
|
|
<refsynopsisdiv><title>C Specification</title>
|
||
|
|
<funcsynopsis>
|
||
|
|
<funcprototype>
|
||
|
|
<funcdef>void <function>glGetTexParameterfv</function></funcdef>
|
||
|
|
<paramdef>GLenum <parameter>target</parameter></paramdef>
|
||
|
|
<paramdef>GLenum <parameter>pname</parameter></paramdef>
|
||
|
|
<paramdef>GLfloat * <parameter>params</parameter></paramdef>
|
||
|
|
</funcprototype>
|
||
|
|
</funcsynopsis>
|
||
|
|
<funcsynopsis>
|
||
|
|
<funcprototype>
|
||
|
|
<funcdef>void <function>glGetTexParameteriv</function></funcdef>
|
||
|
|
<paramdef>GLenum <parameter>target</parameter></paramdef>
|
||
|
|
<paramdef>GLenum <parameter>pname</parameter></paramdef>
|
||
|
|
<paramdef>GLint * <parameter>params</parameter></paramdef>
|
||
|
|
</funcprototype>
|
||
|
|
</funcsynopsis>
|
||
|
|
</refsynopsisdiv>
|
||
|
|
<!-- eqn: ignoring delim $$ -->
|
||
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
||
|
|
<variablelist>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>target</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies the symbolic name of the target texture.
|
||
|
|
<constant>GL_TEXTURE_1D</constant>,
|
||
|
|
<constant>GL_TEXTURE_2D</constant>,
|
||
|
|
<constant>GL_TEXTURE_3D</constant>, and
|
||
|
|
<constant>GL_TEXTURE_CUBE_MAP</constant>
|
||
|
|
are accepted.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>pname</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Specifies the symbolic name of a texture parameter.
|
||
|
|
<constant>GL_TEXTURE_MAG_FILTER</constant>,
|
||
|
|
<constant>GL_TEXTURE_MIN_FILTER</constant>,
|
||
|
|
<constant>GL_TEXTURE_MIN_LOD</constant>,
|
||
|
|
<constant>GL_TEXTURE_MAX_LOD</constant>,
|
||
|
|
<constant>GL_TEXTURE_BASE_LEVEL</constant>,
|
||
|
|
<constant>GL_TEXTURE_MAX_LEVEL</constant>,
|
||
|
|
<constant>GL_TEXTURE_WRAP_S</constant>,
|
||
|
|
<constant>GL_TEXTURE_WRAP_T</constant>,
|
||
|
|
<constant>GL_TEXTURE_WRAP_R</constant>,
|
||
|
|
<constant>GL_TEXTURE_BORDER_COLOR</constant>,
|
||
|
|
<constant>GL_TEXTURE_PRIORITY</constant>,
|
||
|
|
<constant>GL_TEXTURE_RESIDENT</constant>,
|
||
|
|
<constant>GL_TEXTURE_COMPARE_MODE</constant>,
|
||
|
|
<constant>GL_TEXTURE_COMPARE_FUNC</constant>,
|
||
|
|
<constant>GL_DEPTH_TEXTURE_MODE</constant>, and
|
||
|
|
<constant>GL_GENERATE_MIPMAP</constant>
|
||
|
|
are accepted.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><parameter>params</parameter></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the texture parameters.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
</variablelist>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="description"><title>Description</title>
|
||
|
|
<para>
|
||
|
|
<function>glGetTexParameter</function> returns in <parameter>params</parameter> the value or values of the texture parameter
|
||
|
|
specified as <parameter>pname</parameter>.
|
||
|
|
<parameter>target</parameter> defines the target texture,
|
||
|
|
either <constant>GL_TEXTURE_1D</constant>, <constant>GL_TEXTURE_2D</constant>, <constant>GL_TEXTURE_3D</constant>, or <constant>GL_TEXTURE_CUBE_MAP</constant>,
|
||
|
|
to specify one-, two-, or three-dimensional or cube-mapped texturing.
|
||
|
|
<parameter>pname</parameter> accepts the same symbols as <citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>,
|
||
|
|
with the same interpretations:
|
||
|
|
</para>
|
||
|
|
<variablelist>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_MAG_FILTER</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued texture magnification filter,
|
||
|
|
a symbolic constant. The initial value is <constant>GL_LINEAR</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_MIN_FILTER</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued texture minification filter,
|
||
|
|
a symbolic constant. The initial value is <constant>GL_NEAREST_MIPMAP_LINEAR</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_MIN_LOD</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued texture minimum level-of-detail value. The
|
||
|
|
initial value is
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: -1000:-->
|
||
|
|
<mml:mn>-1000</mml:mn>
|
||
|
|
</mml:math></inlineequation>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_MAX_LOD</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued texture maximum level-of-detail value. The
|
||
|
|
initial value is 1000.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_BASE_LEVEL</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued base texture mipmap level. The initial value is 0.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_MAX_LEVEL</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued maximum texture mipmap array level. The initial
|
||
|
|
value is 1000.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_WRAP_S</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued wrapping function for texture coordinate
|
||
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">s</mml:mi></mml:math></inlineequation>,
|
||
|
|
a symbolic constant. The initial value is <constant>GL_REPEAT</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_WRAP_T</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued wrapping function for texture coordinate
|
||
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">t</mml:mi></mml:math></inlineequation>,
|
||
|
|
a symbolic constant. The initial value is <constant>GL_REPEAT</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_WRAP_R</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the single-valued wrapping function for texture coordinate
|
||
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">r</mml:mi></mml:math></inlineequation>,
|
||
|
|
a symbolic constant. The initial value is <constant>GL_REPEAT</constant>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_BORDER_COLOR</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns four integer or floating-point numbers that comprise the RGBA color
|
||
|
|
of the texture border.
|
||
|
|
Floating-point values are returned in the range
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: [0,1]:-->
|
||
|
|
<mml:mfenced open="[" close="]">
|
||
|
|
<mml:mn>0</mml:mn>
|
||
|
|
<mml:mn>1</mml:mn>
|
||
|
|
</mml:mfenced>
|
||
|
|
</mml:math></inlineequation>.
|
||
|
|
Integer values are returned as a linear mapping of the internal floating-point
|
||
|
|
representation such that 1.0 maps to the most positive representable
|
||
|
|
integer and
|
||
|
|
<inlineequation><mml:math>
|
||
|
|
<!-- eqn: -1.0:-->
|
||
|
|
<mml:mn>-1.0</mml:mn>
|
||
|
|
</mml:math></inlineequation>
|
||
|
|
maps to the most negative representable
|
||
|
|
integer. The initial value is (0, 0, 0, 0).
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_PRIORITY</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the residence priority of the target texture (or the named
|
||
|
|
texture bound to it). The initial value is 1.
|
||
|
|
See <citerefentry><refentrytitle>glPrioritizeTextures</refentrytitle></citerefentry>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_RESIDENT</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns the residence status of the target texture.
|
||
|
|
If the value returned in <parameter>params</parameter> is <constant>GL_TRUE</constant>, the texture is
|
||
|
|
resident in texture memory.
|
||
|
|
See <citerefentry><refentrytitle>glAreTexturesResident</refentrytitle></citerefentry>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_COMPARE_MODE</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns a single-valued texture comparison mode, a symbolic constant. The
|
||
|
|
initial value is <constant>GL_NONE</constant>. See <citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_TEXTURE_COMPARE_FUNC</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns a single-valued texture comparison function, a symbolic constant. The
|
||
|
|
initial value is <constant>GL_LEQUAL</constant>. See <citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_DEPTH_TEXTURE_MODE</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns a single-valued texture format indicating how the depth values
|
||
|
|
should be converted into color components. The initial value is
|
||
|
|
<constant>GL_LUMINANCE</constant>. See <citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
<varlistentry>
|
||
|
|
<term><constant>GL_GENERATE_MIPMAP</constant></term>
|
||
|
|
<listitem>
|
||
|
|
<para>
|
||
|
|
Returns a single boolean value indicating if automatic mipmap level updates
|
||
|
|
are enabled.
|
||
|
|
See <citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>.
|
||
|
|
</para>
|
||
|
|
</listitem>
|
||
|
|
</varlistentry>
|
||
|
|
</variablelist>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="notes"><title>Notes</title>
|
||
|
|
<para>
|
||
|
|
<constant>GL_TEXTURE_PRIORITY</constant> and <constant>GL_TEXTURE_RESIDENT</constant> are
|
||
|
|
available only if the GL version is 1.1 or greater.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GL_TEXTURE_3D</constant>,
|
||
|
|
<constant>GL_TEXTURE_MIN_LOD</constant>, <constant>GL_TEXTURE_MAX_LOD</constant>, <constant>GL_TEXTURE_BASE_LEVEL</constant>,
|
||
|
|
<constant>GL_TEXTURE_MAX_LEVEL</constant>, and <constant>GL_TEXTURE_WRAP_R</constant> are available only
|
||
|
|
if the GL version is 1.2 or greater.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GL_TEXTURE_COMPARE_MODE</constant>, <constant>GL_TEXTURE_COMPARE_FUNC</constant>, and
|
||
|
|
<constant>GL_GENERATE_MIPMAP</constant> is available only if the GL version is 1.4 or
|
||
|
|
greater.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
If an error is generated,
|
||
|
|
no change is made to the contents of <parameter>params</parameter>.
|
||
|
|
</para>
|
||
|
|
</refsect1>
|
||
|
|
<refsect1 id="errors"><title>Errors</title>
|
||
|
|
<para>
|
||
|
|
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>target</parameter> or <parameter>pname</parameter> is not an
|
||
|
|
accepted value.
|
||
|
|
</para>
|
||
|
|
<para>
|
||
|
|
<constant>GL_INVALID_OPERATION</constant> is generated if <function>glGetTexParameter</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="seealso"><title>See Also</title>
|
||
|
|
<para>
|
||
|
|
<citerefentry><refentrytitle>glAreTexturesResident</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>glPrioritizeTextures</refentrytitle></citerefentry>,
|
||
|
|
<citerefentry><refentrytitle>glTexParameter</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>
|