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Ensure DRCS mode doesn't affect past DRCS characters

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This commit is contained in:
Gavin MacGregor
2025-07-29 18:04:47 +01:00
parent ead6700002
commit 5b250beedc
1 changed files with 14 additions and 0 deletions
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14
src/qteletextdecoder/decode.cpp
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@@ -121,6 +121,20 @@ void TeletextPageDecode::Invocation::buildMap(int level)
m_fullRowCLUTMap.insert(targetRow, triplet);
break;
case 0x18: // DRCS mode
// If a DRCS character is already in this cell, move this DRCS mode attribute to the next cell.
// Need this workaround in the event of "DRCS character" immediately followed by "DRCS mode" in
// the X/26 list as the Active Position for the just-placed DRCS character and the mode-change
// for further characters is on the same cell.
for (int i=0; i<m_characterMap.values(qMakePair(targetRow, targetColumn)).size(); i++)
if (m_characterMap.values(qMakePair(targetRow, targetColumn)).at(i).modeExt() == 0x2d) {
targetColumn++;
if (targetColumn == 40 || targetColumn == 56 || targetColumn == 72) {
if (targetRow == 25)
break;
targetRow++;
}
}
// fall-through
case 0x20: // Foreground colour
case 0x23: // Background colour
case 0x27: // Additional flash functions