
    <bridgehead>OpenGL and Corresponding OpenCL Image Formats</bridgehead>

    <para>
      <!-- Table 9.4 --> The table below (Table 9.4) describes
      the list of GL texture internal formats and the corresponding CL image formats. If a GL
      texture object with an internal format from the table below is successfully created by
      OpenGL, then there is guaranteed to be a mapping to one of the corresponding CL image
      format(s) in that table. Texture objects created with other OpenGL internal formats may
      (but are not guaranteed to) have a mapping to a CL image format; if such mappings exist,
      they are guaranteed to preserve all color components, data types, and at least the number
      of bits/component actually allocated by OpenGL for that format.
    </para>

    <informaltable frame="all">
        <tgroup cols="2" align="center" colsep="1" rowsep="1">
            <colspec colname="col1" colnum="1" />
            <colspec colname="col2" colnum="2" />
            <thead>
                <row>
                    <entry>GL internal format</entry>
                    <entry>CL image format (channel order, channel data type)</entry>
                </row>
            </thead>

            <tbody>
                <row>
                    <entry><constant>GL_RGBA8</constant></entry>
                    <entry><constant>CL_RGBA, CL_UNORM_INT8 or CL_BGRA, CL_UNORM_INT8</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_SRGBA8_ALPHA8</constant></entry>
                    <entry><constant>CL_sRGBA, CL_UNORM_INT8</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA</constant>, <constant>GL_UNSIGNED_INT_8_8_8_8_REV</constant></entry>
                    <entry><constant>CL_RGBA, CL_UNORM_INT8</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_BGRA</constant>, <constant>GL_UNSIGNED_INT_8_8_8_8_REV</constant></entry>
                    <entry><constant>CL_BGRA, CL_UNORM_INT8</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA8I, GL_RGBA8I_EXT</constant></entry>
                    <entry><constant>CL_RGBA, CL_SIGNED_INT8</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA16I, GL_RGBA16I_EXT</constant></entry>
                    <entry><constant>CL_RGBA, CL_SIGNED_INT16</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA32I, GL_RGBA32I_EXT</constant></entry>
                    <entry><constant>CL_RGBA, CL_SIGNED_INT32</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA8UI, GL_RGBA8UI_EXT</constant></entry>
                    <entry><constant>CL_RGBA, CL_UNSIGNED_INT8</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA16UI, GL_RGBA16UI_EXT</constant></entry>
                    <entry><constant>CL_RGBA, CL_UNSIGNED_INT16</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA32UI, GL_RGBA32UI_EXT</constant></entry>
                    <entry><constant>CL_RGBA, CL_UNSIGNED_INT32</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA8_SNORM</constant></entry>
                    <entry><constant>CL_RGBA, CL_SNORM_INT8</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA16</constant></entry>
                    <entry><constant>CL_RGBA, CL_UNORM_INT16</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA16_SNORM</constant></entry>
                    <entry><constant>CL_RGBA, CL_SNORM_INT166</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA16F, GL_RGBA16F_ARB</constant></entry>
                    <entry><constant>CL_RGBA, CL_HALF_FLOAT</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_RGBA32F, GL_RGBA32F_ARB</constant></entry>
                    <entry><constant>CL_RGBA, CL_FLOAT</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_R8</constant></entry>
                    <entry><constant>CL_R, CL_UNORM_INT8 </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R8_SNORM</constant></entry>
                    <entry><constant>CL_R, CL_SNORM_INT8 </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R16</constant></entry>
                    <entry><constant>CL_R, CL_UNORM_INT16 </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R16_SNORM</constant></entry>
                    <entry><constant>CL_R, CL_SNORM_INT16 </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R16F</constant></entry>
                    <entry><constant>CL_R, CL_HALF_FLOAT </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R32F</constant></entry>
                    <entry><constant>CL_R, CL_FLOAT </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R8I</constant></entry>
                    <entry><constant>CL_R, CL_SIGNED_INT8</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R16I</constant></entry>
                    <entry><constant>CL_R, CL_SIGNED_INT16</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R32I</constant></entry>
                    <entry><constant>CL_R, CL_SIGNED_INT32</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R8UI</constant></entry>
                    <entry><constant>CL_R, CL_UNSIGNED_INT8</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R16UI</constant></entry>
                    <entry><constant>CL_R, CL_UNSIGNED_INT16</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_R32UI</constant></entry>
                    <entry><constant>CL_R, CL_UNSIGNED_INT32</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG8</constant></entry>
                    <entry><constant>CL_RG, CL_UNORM_INT8 </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG8_SNORM</constant></entry>
                    <entry><constant>CL_RG, CL_SNORM_INT8</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG16</constant></entry>
                    <entry><constant>CL_RG, CL_UNORM_INT16</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG16_SNORM</constant></entry>
                    <entry><constant>CL_RG, CL_SNORM_INT16 </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG16F</constant></entry>
                    <entry><constant>CL_RG, CL_HALF_FLOAT </constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG32F</constant></entry>
                    <entry><constant>CL_RG, CL_FLOAT</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG8I</constant></entry>
                    <entry><constant>CL_RG, CL_SIGNED_INT8</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG16I</constant></entry>
                    <entry><constant>CL_RG, CL_SIGNED_INT16</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG32I</constant></entry>
                    <entry><constant>CL_RG, CL_SIGNED_INT32</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG8UI</constant></entry>
                    <entry><constant>CL_RG, CL_UNSIGNED_INT8</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG16UI</constant></entry>
                    <entry><constant>CL_RG, CL_UNSIGNED_INT16</constant></entry>
                </row>
                <row>
                    <entry><constant>GL_RG32UI</constant></entry>
                    <entry><constant>CL_RG, CL_UNSIGNED_INT32</constant></entry>
                </row>
            </tbody>
        </tgroup>
    </informaltable>

    <para>
        If the <citerefentry><refentrytitle>cl_khr_gl_depth_images</refentrytitle></citerefentry> 
        extension is enabled, the 
        following new image formats are added to table 9.4 in section 9.6.3.1 of the OpenCL 2.0
        extension specification. If a GL texture object with an internal format from table 9.4 is 
        successfully created by OpenGL, then there is guaranteed to be a mapping to one of the 
        corresponding CL image format(s) in that table.
    </para>

    <informaltable frame="all">
        <tgroup cols="2" align="center" colsep="1" rowsep="1">
            <colspec colname="col1" colnum="1" />
            <colspec colname="col2" colnum="2" />
            <thead>
                <row>
                    <entry>GL internal format</entry>
                    <entry>CL image format (channel order, channel data type)</entry>
                </row>
            </thead>

            <tbody>
                <row>
                    <entry><constant>GL_DEPTH_COMPONENT32F</constant></entry>
                    <entry><constant>CL_DEPTH, CL_FLOAT</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_DEPTH_COMPONENT16</constant></entry>
                    <entry><constant>CL_DEPTH, CL_UNORM_INT16</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_DEPTH24_STENCIL8</constant></entry>
                    <entry><constant>CL_DEPTH_STENCIL, CL_UNORM_INT24</constant></entry>
                </row>

                <row>
                    <entry><constant>GL_DEPTH32F_STENCIL8</constant></entry>
                    <entry><constant>CL_DEPTH_STENCIL, CL_FLOAT</constant></entry>
                </row>

            </tbody>
        </tgroup>
    </informaltable>

<!-- 22-Dec-2013, rev. 19 -->