mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-25 16:15:33 +00:00
296 lines
16 KiB
XML
296 lines
16 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="glCompressedTexImage2D">
|
|
<refmeta>
|
|
<refmetainfo>
|
|
<copyright>
|
|
<year>1991-2006</year>
|
|
<holder>Silicon Graphics, Inc.</holder>
|
|
</copyright>
|
|
</refmetainfo>
|
|
<refentrytitle>glCompressedTexImage2D</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glCompressedTexImage2D</refname>
|
|
<refpurpose>specify a two-dimensional texture image in a compressed format</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>void <function>glCompressedTexImage2D</function></funcdef>
|
|
<paramdef>GLenum <parameter>target</parameter></paramdef>
|
|
<paramdef>GLint <parameter>level</parameter></paramdef>
|
|
<paramdef>GLenum <parameter>internalformat</parameter></paramdef>
|
|
<paramdef>GLsizei <parameter>width</parameter></paramdef>
|
|
<paramdef>GLsizei <parameter>height</parameter></paramdef>
|
|
<paramdef>GLint <parameter>border</parameter></paramdef>
|
|
<paramdef>GLsizei <parameter>imageSize</parameter></paramdef>
|
|
<paramdef>const GLvoid * <parameter>data</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 target texture.
|
|
Must be <constant>GL_TEXTURE_2D</constant>, <constant>GL_PROXY_TEXTURE_2D</constant>,
|
|
<constant>GL_TEXTURE_CUBE_MAP_POSITIVE_X</constant>,
|
|
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_X</constant>,
|
|
<constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Y</constant>,
|
|
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</constant>,
|
|
<constant>GL_TEXTURE_CUBE_MAP_POSITIVE_Z</constant>,
|
|
<constant>GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</constant>, or
|
|
<constant>GL_PROXY_TEXTURE_CUBE_MAP</constant>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>level</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the level-of-detail number.
|
|
Level 0 is the base image level.
|
|
Level <emphasis>n</emphasis> is the <emphasis>n</emphasis>th mipmap reduction image.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>internalformat</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the format of the compressed image data stored at address <parameter>data</parameter>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>width</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the width of the texture image including the border if any. If the GL version does not support non-power-of-two sizes, this value must be
|
|
<inlineequation><mml:math>
|
|
<!-- eqn: 2 sup n + 2 ( border ):-->
|
|
<mml:mrow>
|
|
<mml:msup><mml:mn>2</mml:mn>
|
|
<mml:mi mathvariant="italic">n</mml:mi>
|
|
</mml:msup>
|
|
<mml:mo>+</mml:mo>
|
|
<mml:mrow>
|
|
<mml:mn>2</mml:mn>
|
|
<mml:mo>⁡</mml:mo>
|
|
<mml:mfenced open="(" close=")">
|
|
<mml:mi mathvariant="italic">border</mml:mi>
|
|
</mml:mfenced>
|
|
</mml:mrow>
|
|
</mml:mrow>
|
|
</mml:math></inlineequation>
|
|
for some integer
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">n</mml:mi></mml:math></inlineequation>.
|
|
All
|
|
implementations support 2D texture images that are at least 64 texels
|
|
wide and cube-mapped texture images that are at least 16 texels wide.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>height</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the height of the texture image including the border if any. If the GL version does not support non-power-of-two sizes, this value must be
|
|
Must be
|
|
<inlineequation><mml:math>
|
|
<!-- eqn: 2 sup n + 2 ( border ):-->
|
|
<mml:mrow>
|
|
<mml:msup><mml:mn>2</mml:mn>
|
|
<mml:mi mathvariant="italic">n</mml:mi>
|
|
</mml:msup>
|
|
<mml:mo>+</mml:mo>
|
|
<mml:mrow>
|
|
<mml:mn>2</mml:mn>
|
|
<mml:mo>⁡</mml:mo>
|
|
<mml:mfenced open="(" close=")">
|
|
<mml:mi mathvariant="italic">border</mml:mi>
|
|
</mml:mfenced>
|
|
</mml:mrow>
|
|
</mml:mrow>
|
|
</mml:math></inlineequation>
|
|
for some integer
|
|
<inlineequation><mml:math><mml:mi mathvariant="italic">n</mml:mi></mml:math></inlineequation>.
|
|
All
|
|
implementations support 2D texture images that are at least 64 texels
|
|
high and cube-mapped texture images that are at least 16 texels high.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>border</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the width of the border.
|
|
Must be either 0 or 1.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>imageSize</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the number of unsigned bytes of image data starting at the
|
|
address specified by <parameter>data</parameter>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>data</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies a pointer to the compressed image data in memory.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 id="description"><title>Description</title>
|
|
<para>
|
|
Texturing maps a portion of a specified texture image onto each graphical
|
|
primitive for which texturing is enabled. To enable and disable
|
|
two-dimensional texturing, call <citerefentry><refentrytitle>glEnable</refentrytitle></citerefentry> and <citerefentry><refentrytitle>glDisable</refentrytitle></citerefentry> with argument
|
|
<constant>GL_TEXTURE_2D</constant>. To enable and disable texturing using
|
|
cube-mapped textures, call <citerefentry><refentrytitle>glEnable</refentrytitle></citerefentry> and <citerefentry><refentrytitle>glDisable</refentrytitle></citerefentry> with argument
|
|
<constant>GL_TEXTURE_CUBE_MAP</constant>.
|
|
</para>
|
|
<para>
|
|
<function>glCompressedTexImage2D</function> loads a previously defined, and retrieved, compressed two-dimensional
|
|
texture image if <parameter>target</parameter> is <constant>GL_TEXTURE_2D</constant> (see <citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>).
|
|
</para>
|
|
<para>
|
|
If <parameter>target</parameter> is <constant>GL_PROXY_TEXTURE_2D</constant>, no data is read from <parameter>data</parameter>, but
|
|
all of the texture image state is recalculated, checked for consistency,
|
|
and checked against the implementation's capabilities. If the
|
|
implementation cannot handle a texture of the requested texture size, it
|
|
sets all of the image state to 0, but does not generate an error (see
|
|
<citerefentry><refentrytitle>glGetError</refentrytitle></citerefentry>). To query for an entire mipmap array, use an image array level
|
|
greater than or equal to 1.
|
|
</para>
|
|
<para>
|
|
<parameter>internalformat</parameter> must be an extension-specified compressed-texture format.
|
|
When a texture is loaded with <citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry> using a generic compressed
|
|
texture format (e.g., <constant>GL_COMPRESSED_RGB</constant>), the GL selects from one of
|
|
its extensions supporting compressed textures. In order to load the
|
|
compressed texture image using <function>glCompressedTexImage2D</function>, query the compressed texture image's
|
|
size and format using <citerefentry><refentrytitle>glGetTexLevelParameter</refentrytitle></citerefentry>.
|
|
</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 texture image is
|
|
specified, <parameter>data</parameter> is treated as a byte offset into the buffer object's data store.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="notes"><title>Notes</title>
|
|
<para>
|
|
<function>glCompressedTexImage2D</function> is available only if the GL version is 1.3 or greater.
|
|
</para>
|
|
<para>
|
|
Non-power-of-two textures are supported if the GL version is 2.0 or greater, or if the implementation exports the <constant>GL_ARB_texture_non_power_of_two</constant> extension.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="errors"><title>Errors</title>
|
|
<para>
|
|
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>internalformat</parameter> is one of the generic compressed internal formats: <constant>GL_COMPRESSED_ALPHA</constant>,
|
|
<constant>GL_COMPRESSED_LUMINANCE</constant>, <constant>GL_COMPRESSED_LUMINANCE_ALPHA</constant>,
|
|
<constant>GL_COMPRESSED_INTENSITY</constant>, <constant>GL_COMPRESSED_RGB</constant>, or
|
|
<constant>GL_COMPRESSED_RGBA</constant>.
|
|
</para>
|
|
<para>
|
|
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>imageSize</parameter> is not consistent with
|
|
the format, dimensions, and contents of the specified compressed image
|
|
data.
|
|
</para>
|
|
<para>
|
|
<constant>GL_INVALID_OPERATION</constant> is generated if parameter combinations are not
|
|
supported by the specific compressed internal format as specified in the
|
|
specific texture compression extension.
|
|
</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 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>glCompressedTexImage2D</function>
|
|
is executed between the execution of <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry>
|
|
and the corresponding execution of <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>.
|
|
</para>
|
|
<para>
|
|
Undefined results, including abnormal program termination, are generated if
|
|
<parameter>data</parameter> is not encoded in a manner consistent with the extension
|
|
specification defining the internal compression format.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="associatedgets"><title>Associated Gets</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGetCompressedTexImage</refentrytitle></citerefentry>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_TEXTURE_COMPRESSED</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_PIXEL_UNPACK_BUFFER_BINDING</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glGetTexLevelParameter</refentrytitle></citerefentry> with arguments <constant>GL_TEXTURE_INTERNAL_FORMAT</constant>
|
|
and <constant>GL_TEXTURE_COMPRESSED_IMAGE_SIZE</constant>
|
|
</para>
|
|
<para>
|
|
<citerefentry><refentrytitle>glIsEnabled</refentrytitle></citerefentry> with argument
|
|
<constant>GL_TEXTURE_2D</constant> or <constant>GL_TEXTURE_CUBE_MAP</constant>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="seealso"><title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glActiveTexture</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glColorTable</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCompressedTexImage1D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCompressedTexImage3D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCompressedTexSubImage1D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCompressedTexSubImage2D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCompressedTexSubImage3D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glConvolutionFilter1D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCopyPixels</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCopyTexImage1D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCopyTexSubImage1D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCopyTexSubImage2D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glCopyTexSubImage3D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glMatrixMode</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glPixelStore</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glPixelTransfer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexEnv</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexGen</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexSubImage1D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexSubImage2D</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glTexSubImage3D</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>
|