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Data Fields</h2></td></tr>
<tr class="memitem:a7325bbd9a7da9072b0028ef2cced5562"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structttx__extension.html#a7325bbd9a7da9072b0028ef2cced5562">designations</a></td></tr>
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<tr class="memitem:a9750ea1fcb8e12d1a10a88ad64156d50"><td class="memItemLeft" align="right" valign="top">vbi_ttx_charset_code </td><td class="memItemRight" valign="bottom"><a class="el" href="structttx__extension.html#a9750ea1fcb8e12d1a10a88ad64156d50">charset_code</a> [2]</td></tr>
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<tr class="memitem:a25e454f80476e00a8b7de4b1cc2dd0b2"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structttx__extension.html#a25e454f80476e00a8b7de4b1cc2dd0b2">def_screen_color</a></td></tr>
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unsigned int </td><td class="memItemRight" valign="bottom"><b>def_row_color</b></td></tr>
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<tr class="memitem:acb9dedfd97051fe2e8084d0897b4a027"><td class="memItemLeft" align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structttx__extension.html#acb9dedfd97051fe2e8084d0897b4a027">foreground_clut</a></td></tr>
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unsigned int </td><td class="memItemRight" valign="bottom"><b>background_clut</b></td></tr>
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struct <a class="el" href="structttx__ext__fallback.html">ttx_ext_fallback</a> </td><td class="memItemRight" valign="bottom"><b>fallback</b></td></tr>
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<tr class="memitem:ac00f74078abad9755d3fb4c15e90cfb5"><td class="memItemLeft" align="right" valign="top">uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structttx__extension.html#ac00f74078abad9755d3fb4c15e90cfb5">drcs_clut</a> [2+2 *4+2 *16]</td></tr>
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<tr class="memitem:af168a6f1d0436e4bc8a437ecea56a882"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__Page.html#gaba178f9da35c6ecb95c20e9fd9ef8a42">vbi_rgba</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structttx__extension.html#af168a6f1d0436e4bc8a437ecea56a882">color_map</a> [40]</td></tr>
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<h2 class="groupheader">Field Documentation</h2>
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<td class="memname">unsigned int ttx_extension::designations</td>
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<p>We have data from packets X/28 (in LOP) or M/29 (in magazine) with this set of designations. LOP pages without X/28 packets should fall back to the magazine defaults unless these bits are set. The extension data in struct <a class="el" href="structttx__magazine.html">ttx_magazine</a> is always valid, contains global defaults as specified in EN 300 706 (see _vbi_teletext_decoder_default_magazine()) unless M/29 packets have been received.</p>
<ul>
<li>1 << 4: color_map[0 ... 15] is valid</li>
<li>1 << 1: drcs_clut[] is valid</li>
<li>1 << 0 or 1 << 4: the remaining fields are valid.</li>
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<p>color_map[32 .. 39] is always valid. </p>
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<td class="memname">vbi_ttx_charset_code ttx_extension::charset_code[2]</td>
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<p>Primary and secondary character set. </p>
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<td class="memname">unsigned int ttx_extension::def_screen_color</td>
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<p>Default colors. </p>
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<td class="memname">unsigned int ttx_extension::foreground_clut</td>
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<p>Adding these values (0, 8, 16, 24) to character color 0 ... 7 gives an index into color_map[] below. </p>
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<td class="memname">uint8_t ttx_extension::drcs_clut[2+2 *4+2 *16]</td>
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<p>DRCS color lookup table. Translates (G)DRCS pixel values to indices into the color_map[].</p>
<ul>
<li>2 dummy entries (12x10x1 (G)DRCS pixels are interpreted like built-in character pixels, selecting the current foreground or background color).</li>
<li>4 entries for 12x10x2 GDRCS pixel 0 ... 3 to color_map[].</li>
<li>4 more for local DRCS</li>
<li>16 entries for 12x10x4 and 6x5x4 GDRCS pixel 0 ... 15 to color_map[].</li>
<li>16 more for local DRCS. </li>
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<td class="memname"><a class="el" href="group__Page.html#gaba178f9da35c6ecb95c20e9fd9ef8a42">vbi_rgba</a> ttx_extension::color_map[40]</td>
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<p>Five palettes of 8 each colors each.</p>
<p>Level 1.0 and 1.5 pages use only palette #0, Level 2.5 and 3.5 pages use palette #0 ... #3.</p>
<p>At Level 2.5 palette #2 and #3 are redefinable, except color_map[8] which is "transparent" color (VBI_TRANSPARENT_BLACK). At Level 3.5 palette #0 and #1 are also redefinable.</p>
<p>Palette #4 never changes and contains libzvbi internal colors for navigation bars, search text highlighting etc. These colors are roughly the same as the default palette #0, see vbi_color. </p>
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