
<refentry id="glColorTable">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>1991-2006</year>
                <holder>Silicon Graphics, Inc.</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glColorTable</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glColorTable</refname>
        <refpurpose>define a color lookup table</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glColorTable</function></funcdef>
                <paramdef>GLenum <parameter>target</parameter></paramdef>
                <paramdef>GLenum <parameter>internalformat</parameter></paramdef>
                <paramdef>GLsizei <parameter>width</parameter></paramdef>
                <paramdef>GLenum <parameter>format</parameter></paramdef>
                <paramdef>GLenum <parameter>type</parameter></paramdef>
                <paramdef>const GLvoid * <parameter>data</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>target</parameter></term>
            <listitem>
                <para>
                    Must be one of
                    <constant>GL_COLOR_TABLE</constant>,
                    <constant>GL_POST_CONVOLUTION_COLOR_TABLE</constant>,
                    <constant>GL_POST_COLOR_MATRIX_COLOR_TABLE</constant>,
                    <constant>GL_PROXY_COLOR_TABLE</constant>,
                    <constant>GL_PROXY_POST_CONVOLUTION_COLOR_TABLE</constant>,
                    or
                    <constant>GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE</constant>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>internalformat</parameter></term>
            <listitem>
                <para>
                    The internal format of the color table.
                    The allowable values are
                    <constant>GL_ALPHA</constant>,
                    <constant>GL_ALPHA4</constant>,
                    <constant>GL_ALPHA8</constant>,
                    <constant>GL_ALPHA12</constant>,
                    <constant>GL_ALPHA16</constant>,
                    <constant>GL_LUMINANCE</constant>,
                    <constant>GL_LUMINANCE4</constant>,
                    <constant>GL_LUMINANCE8</constant>,
                    <constant>GL_LUMINANCE12</constant>,
                    <constant>GL_LUMINANCE16</constant>,
                    <constant>GL_LUMINANCE_ALPHA</constant>,
                    <constant>GL_LUMINANCE4_ALPHA4</constant>,
                    <constant>GL_LUMINANCE6_ALPHA2</constant>,
                    <constant>GL_LUMINANCE8_ALPHA8</constant>,
                    <constant>GL_LUMINANCE12_ALPHA4</constant>,
                    <constant>GL_LUMINANCE12_ALPHA12</constant>,
                    <constant>GL_LUMINANCE16_ALPHA16</constant>,
                    <constant>GL_INTENSITY</constant>,
                    <constant>GL_INTENSITY4</constant>,
                    <constant>GL_INTENSITY8</constant>,
                    <constant>GL_INTENSITY12</constant>,
                    <constant>GL_INTENSITY16</constant>,
                    <constant>GL_R3_G3_B2</constant>,
                    <constant>GL_RGB</constant>,
                    <constant>GL_RGB4</constant>,
                    <constant>GL_RGB5</constant>,
                    <constant>GL_RGB8</constant>,
                    <constant>GL_RGB10</constant>,
                    <constant>GL_RGB12</constant>,
                    <constant>GL_RGB16</constant>,
                    <constant>GL_RGBA</constant>,
                    <constant>GL_RGBA2</constant>,
                    <constant>GL_RGBA4</constant>,
                    <constant>GL_RGB5_A1</constant>,
                    <constant>GL_RGBA8</constant>,
                    <constant>GL_RGB10_A2</constant>,
                    <constant>GL_RGBA12</constant>, and
                    <constant>GL_RGBA16</constant>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>width</parameter></term>
            <listitem>
                <para>
                    The number of entries in the color lookup table specified by <parameter>data</parameter>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>format</parameter></term>
            <listitem>
                <para>
                    The format of the pixel data in <parameter>data</parameter>.
                    The allowable values are
                    <constant>GL_RED</constant>,
                    <constant>GL_GREEN</constant>,
                    <constant>GL_BLUE</constant>,
                    <constant>GL_ALPHA</constant>,
                    <constant>GL_LUMINANCE</constant>,
                    <constant>GL_LUMINANCE_ALPHA</constant>,
                    <constant>GL_RGB</constant>,
                    <constant>GL_BGR</constant>,
                    <constant>GL_RGBA</constant>, and
                    <constant>GL_BGRA</constant>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>type</parameter></term>
            <listitem>
                <para>
                    The type of the pixel data in <parameter>data</parameter>.
                    The allowable values are
                    <constant>GL_UNSIGNED_BYTE</constant>,
                    <constant>GL_BYTE</constant>,
                    <constant>GL_UNSIGNED_SHORT</constant>,
                    <constant>GL_SHORT</constant>,
                    <constant>GL_UNSIGNED_INT</constant>,
                    <constant>GL_INT</constant>,
                    <constant>GL_FLOAT</constant>,
                    <constant>GL_UNSIGNED_BYTE_3_3_2</constant>,
                    <constant>GL_UNSIGNED_BYTE_2_3_3_REV</constant>,
                    <constant>GL_UNSIGNED_SHORT_5_6_5</constant>,
                    <constant>GL_UNSIGNED_SHORT_5_6_5_REV</constant>,
                    <constant>GL_UNSIGNED_SHORT_4_4_4_4</constant>,
                    <constant>GL_UNSIGNED_SHORT_4_4_4_4_REV</constant>,
                    <constant>GL_UNSIGNED_SHORT_5_5_5_1</constant>,
                    <constant>GL_UNSIGNED_SHORT_1_5_5_5_REV</constant>,
                    <constant>GL_UNSIGNED_INT_8_8_8_8</constant>,
                    <constant>GL_UNSIGNED_INT_8_8_8_8_REV</constant>,
                    <constant>GL_UNSIGNED_INT_10_10_10_2</constant>, and
                    <constant>GL_UNSIGNED_INT_2_10_10_10_REV</constant>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>data</parameter></term>
            <listitem>
                <para>
                    Pointer to a one-dimensional array of pixel data that is processed to
                    build the color table.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            <function>glColorTable</function> may be used in two ways:
            to test the actual size and color resolution of a lookup table
            given a particular set of parameters,
            or to load the contents of a color lookup
            table.
            Use the targets <constant>GL_PROXY_*</constant> for the first case
            and the other targets for the second case.
        </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 color table is
            specified, <parameter>data</parameter> is treated as a byte offset into the buffer object's data store.
        </para>
        <para>
            If <parameter>target</parameter> is <constant>GL_COLOR_TABLE</constant>,
            <constant>GL_POST_CONVOLUTION_COLOR_TABLE</constant>,
            or
            <constant>GL_POST_COLOR_MATRIX_COLOR_TABLE</constant>,
            <function>glColorTable</function> builds a color lookup table from an array of pixels.
            The pixel array specified by <parameter>width</parameter>, <parameter>format</parameter>, <parameter>type</parameter>, and <parameter>data</parameter>
            is extracted from memory and
            processed just as if <citerefentry><refentrytitle>glDrawPixels</refentrytitle></citerefentry> were called, but processing
            stops after the final expansion to RGBA is completed.
        </para>
        <para>
            The four scale parameters and the four bias parameters that are defined
            for the table are then used to scale and bias the R, G, B, and A components
            of each pixel.
            (Use <function>glColorTableParameter</function> to set these scale and bias
            parameters.)
        </para>
        <para>
            Next, the R, G, B, and A values are clamped to 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>.
            Each pixel is then converted to the internal format specified by
            <parameter>internalformat</parameter>.
            This conversion simply maps the component values of the pixel (R, G, B,
            and A) to the values included in the internal format (red, green, blue,
            alpha, luminance, and intensity).  The mapping is as follows:
        </para>
        <para>
        </para>
        <informaltable frame="topbot">
            <tgroup cols="7" align="left">
                <colspec colwidth="3*" />
                <colspec colwidth="1*" align="center"/>
                <colspec colwidth="1*" align="center"/>
                <colspec colwidth="1*" align="center"/>
                <colspec colwidth="1*" align="center"/>
                <colspec colwidth="1.5*" align="center"/>
                <colspec colwidth="1.5*" align="center"/>
                <thead>
                    <row>
                        <entry rowsep="1" align="left"><emphasis role="bold">
                        Internal Format
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Red
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Green
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Blue
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Alpha
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Luminance
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Intensity
                        </emphasis></entry>
                    </row>
                </thead>
                <tbody>
                    <row>
                        <entry align="left">
                        <constant>GL_ALPHA</constant>
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        A
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                         
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_LUMINANCE</constant>
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        R
                        </entry>
                        <entry align="center">
                         
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_LUMINANCE_ALPHA</constant>
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        A
                        </entry>
                        <entry align="center">
                        R
                        </entry>
                        <entry align="center">
                         
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_INTENSITY</constant>
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        R
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_RGB</constant>
                        </entry>
                        <entry align="center">
                        R
                        </entry>
                        <entry align="center">
                        G
                        </entry>
                        <entry align="center">
                        B
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                         
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_RGBA</constant>
                        </entry>
                        <entry align="center">
                        R
                        </entry>
                        <entry align="center">
                        G
                        </entry>
                        <entry align="center">
                        B
                        </entry>
                        <entry align="center">
                        A
                        </entry>
                        <entry align="center">
                        </entry>
                        <entry align="center">
                         
                        </entry>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
        <para>
            Finally, the red, green, blue, alpha, luminance, and/or intensity components of
            the resulting pixels are stored in the color table.
            They form a one-dimensional table with indices in the range
            <inlineequation><mml:math>
                <!-- eqn: [0, width-1]:-->
                <mml:mfenced open="[" close="]">
                    <mml:mn>0</mml:mn>
                    <mml:mrow>
                        <mml:mi mathvariant="italic">width</mml:mi>
                        <mml:mo>-</mml:mo>
                        <mml:mn>1</mml:mn>
                    </mml:mrow>
                </mml:mfenced>
            </mml:math></inlineequation>.
        </para>
        <para>
            If <parameter>target</parameter> is <constant>GL_PROXY_*</constant>,
            <function>glColorTable</function> recomputes and stores the values of the proxy color table's state
            variables
            <constant>GL_COLOR_TABLE_FORMAT</constant>,
            <constant>GL_COLOR_TABLE_WIDTH</constant>,
            <constant>GL_COLOR_TABLE_RED_SIZE</constant>,
            <constant>GL_COLOR_TABLE_GREEN_SIZE</constant>,
            <constant>GL_COLOR_TABLE_BLUE_SIZE</constant>,
            <constant>GL_COLOR_TABLE_ALPHA_SIZE</constant>,
            <constant>GL_COLOR_TABLE_LUMINANCE_SIZE</constant>, and
            <constant>GL_COLOR_TABLE_INTENSITY_SIZE</constant>.
            There is no effect on the image or state of any actual color table.
            If the specified color table is too large to be supported, then all the
            proxy state variables listed above are set to zero.
            Otherwise, the color table could be supported by <function>glColorTable</function>
            using the corresponding non-proxy target,
            and the proxy state variables are set as if that target were being defined.
        </para>
        <para>
            The proxy state variables can be retrieved by calling
            <citerefentry><refentrytitle>glGetColorTableParameter</refentrytitle></citerefentry> with a target of
            <constant>GL_PROXY_*</constant>.
            This allows the application to decide if a particular <function>glColorTable</function>
            command would succeed, and to determine what the resulting color table
            attributes would be.
        </para>
        <para>
            If a color table is enabled, and its width is non-zero, then its
            contents are used to replace a subset of the components of each RGBA
            pixel group, based on the internal format of the table.
        </para>
        <para>
            Each pixel group has color components (R, G, B, A)
            that are in the range 
            <inlineequation><mml:math>
                <!-- eqn: [0.0, 1.0]:-->
                <mml:mfenced open="[" close="]">
                    <mml:mn>0.0</mml:mn>
                    <mml:mn>1.0</mml:mn>
                </mml:mfenced>
            </mml:math></inlineequation>.
            The color components are rescaled to
            the size of the color lookup table to form an index.
            Then a subset of the components based on the internal format of the table are
            replaced by the table entry selected by that index.
            If the color components and contents of the table are represented as follows:
        </para>
        <para>
        </para>
        <informaltable frame="topbot">
            <tgroup cols="2" align="left">
                <colspec align="center"/>
                <colspec align="center"/>
                <thead>
                    <row>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Representation
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        Meaning
                        </emphasis></entry>
                    </row>
                </thead>
                <tbody>
                    <row>
                        <entry align="center">
                        <code>r</code>
                        </entry>
                        <entry align="left">
                        Table index computed from <code>R</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>g</code>
                        </entry>
                        <entry align="left">
                        Table index computed from <code>G</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>b</code>
                        </entry>
                        <entry align="left">
                        Table index computed from <code>B</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>a</code>
                        </entry>
                        <entry align="left">
                        Table index computed from <code>A</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>L[i]</code>
                        </entry>
                        <entry align="left">
                        Luminance value at table index <code>i</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>I[i]</code>
                        </entry>
                        <entry align="left">
                        Intensity value at table index <code>i</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>R[i]</code>
                        </entry>
                        <entry align="left">
                        Red value at table index <code>i</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>G[i]</code>
                        </entry>
                        <entry align="left">
                        Green value at table index <code>i</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>B[i]</code>
                        </entry>
                        <entry align="left">
                        Blue value at table index <code>i</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="center">
                        <code>A[i]</code>
                        </entry>
                        <entry align="left">
                        Alpha value at table index <code>i</code>
                        </entry>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
        <para>
            then the result of color table lookup is as follows:
        </para>
        <para>
        </para>
        <informaltable frame="topbot">
            <tgroup cols="5" align="left">
                <colspec colwidth="2*" />
                <colspec colwidth="1*" colname="r"/>
                <colspec colwidth="1*" colname="g"/>
                <colspec colwidth="1*" colname="b"/>
                <colspec colwidth="1*" colname="a"/>
                <thead>
                    <row>
                        <entry align="left"><emphasis role="bold">
                        </emphasis></entry>
                        <entry namest="r" nameend="a" align="center"><emphasis role="bold">
                        Resulting Texture Components
                        </emphasis></entry>
                    </row>
                    <row>
                        <entry rowsep="1" align="left"><emphasis role="bold">
                        Table Internal Format
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        R
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        G
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        B
                        </emphasis></entry>
                        <entry rowsep="1" align="center"><emphasis role="bold">
                        A
                        </emphasis></entry>
                    </row>
                </thead>
                <tbody>
                    <row>
                        <entry align="left">
                        <constant>GL_ALPHA</constant>
                        </entry>
                        <entry align="center">
                        <code>R</code>
                        </entry>
                        <entry align="center">
                        <code>G</code>
                        </entry>
                        <entry align="center">
                        <code>B</code>
                        </entry>
                        <entry align="center">
                        <code>A[a]</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_LUMINANCE</constant>
                        </entry>
                        <entry align="center">
                        <code>L[r]</code>
                        </entry>
                        <entry align="center">
                        <code>L[g]</code>
                        </entry>
                        <entry align="center">
                        <code>L[b]</code>
                        </entry>
                        <entry align="center">
                        <code>At</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_LUMINANCE_ALPHA</constant>
                        </entry>
                        <entry align="center">
                        <code>L[r]</code>
                        </entry>
                        <entry align="center">
                        <code>L[g]</code>
                        </entry>
                        <entry align="center">
                        <code>L[b]</code>
                        </entry>
                        <entry align="center">
                        <code>A[a]</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_INTENSITY</constant>
                        </entry>
                        <entry align="center">
                        <code>I[r]</code>
                        </entry>
                        <entry align="center">
                        <code>I[g]</code>
                        </entry>
                        <entry align="center">
                        <code>I[b]</code>
                        </entry>
                        <entry align="center">
                        <code>I[a]</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_RGB</constant>
                        </entry>
                        <entry align="center">
                        <code>R[r]</code>
                        </entry>
                        <entry align="center">
                        <code>G[g]</code>
                        </entry>
                        <entry align="center">
                        <code>B[b]</code>
                        </entry>
                        <entry align="center">
                        <code>A</code>
                        </entry>
                    </row>
                    <row>
                        <entry align="left">
                        <constant>GL_RGBA</constant>
                        </entry>
                        <entry align="center">
                        <code>R[r]</code>
                        </entry>
                        <entry align="center">
                        <code>G[g]</code>
                        </entry>
                        <entry align="center">
                        <code>B[b]</code>
                        </entry>
                        <entry align="center">
                        <code>A[a]</code>
                        </entry>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
        <para>
            When <constant>GL_COLOR_TABLE</constant> is enabled, the colors resulting from
            the pixel map operation (if it is enabled) are mapped
            by the color lookup table before being passed to the convolution
            operation. The colors resulting from the convolution operation
            are modified by the post convolution color lookup table when
            <constant>GL_POST_CONVOLUTION_COLOR_TABLE</constant>
            is enabled. These modified colors are then sent to the color matrix operation.
            Finally, if <constant>GL_POST_COLOR_MATRIX_COLOR_TABLE</constant>
            is enabled, the colors resulting from the color matrix operation
            are mapped by the post color matrix color lookup table before being
            used by the histogram operation.
        </para>
        <para>
        </para>
    </refsect1>
    <refsect1 id="notes"><title>Notes</title>
        <para>
            <function>glColorTable</function> is present only if <code>ARB_imaging</code> is returned when <citerefentry><refentrytitle>glGetString</refentrytitle></citerefentry>
            is called with an argument of <constant>GL_EXTENSIONS</constant>.
        </para>
        <para>
            If <parameter>target</parameter> is set to <constant>GL_COLOR_TABLE</constant>,
            <constant>GL_POST_CONVOLUTION_COLOR_TABLE</constant>,
            or <constant>GL_POST_COLOR_MATRIX_COLOR_TABLE</constant>,
            then <parameter>width</parameter> must be a power of two or a <constant>GL_INVALID_VALUE</constant>
            error is generated.
        </para>
        <para>
        </para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>target</parameter> is not one of the allowable
            values.
        </para>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>internalformat</parameter> is not one of the
            allowable values.
        </para>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>format</parameter> is not one of the allowable
            values.
        </para>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>type</parameter> is not one of the allowable
            values.
        </para>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>width</parameter> is less than zero.
        </para>
        <para>
            <constant>GL_TABLE_TOO_LARGE</constant> is generated if the requested color table
            is too large to be supported by the implementation, and <parameter>target</parameter> is
            not a <constant>GL_PROXY_*</constant> target.
        </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 a non-zero buffer object name is bound to the
            <constant>GL_PIXEL_UNPACK_BUFFER</constant> target and <parameter>data</parameter> is not evenly divisible 
            into the number of bytes needed to store in memory a datum indicated by <parameter>type</parameter>.
        </para>
        <para>
            <constant>GL_INVALID_OPERATION</constant> is generated if <function>glColorTable</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>glGetColorTableParameter</refentrytitle></citerefentry>
        </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>glColorSubTable</refentrytitle></citerefentry>,
            <function>glColorTableParameter</function>,
            <citerefentry><refentrytitle>glCopyColorTable</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glCopyColorSubTable</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glGetColorTable</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>
