daniel/QTeletextMaker
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Allow header row editing

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This commit is contained in:
Gavin MacGregor
2025-03-18 14:48:03 +00:00
parent 1d462f4355
commit 0493f0e270
8 changed files with 89 additions and 15 deletions
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24
src/qteletextmaker/saveformats.cpp
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@@ -202,6 +202,10 @@ void SaveTTIFormat::writeSubPageStart(const PageBase &subPage, int subPageNumber
void SaveTTIFormat::writeSubPageBody(const PageBase &subPage)
{
// Header row
if (subPage.packetExists(0))
writePacket(format7BitPacket(subPage.packet(0)), 0);
// FLOF links
bool writeFLCommand = false;
if (m_document->pageFunction() == TeletextDocument::PFLevelOnePage && subPage.packetExists(27,0)) {
@@ -358,19 +362,27 @@ int SaveT42Format::writePacket(QByteArray packet, int packetNumber, int designat
void SaveT42Format::writeSubPageStart(const PageBase &subPage, int subPageNumber)
{
QByteArray packet;
// Convert integer to Binary Coded Decimal
subPageNumber = QString::number(subPageNumber).toInt(nullptr, 16);
// Displayable row header we export as spaces, hence the (odd parity valid) 0x20 init value
QByteArray packet(42, 0x20);
m_magazineNumber = (m_document->pageNumber() & 0xf00) >> 8;
if (m_magazineNumber == 8)
m_magazineNumber = 0;
// Write X/0 separately as it features both Hamming 8/4 and 7-bit odd parity within
packet[0] = m_magazineNumber & 0x07;
packet[1] = 0; // Packet number 0
// Retrieve and apply odd parity to header row if there's text there,
// otherwise create an initial packet of (odd parity valid) spaces
if (subPage.packetExists(0))
packet = format7BitPacket(subPage.packet(0));
else
packet.fill(0x20, 40);
// Byte 1 of MRAG - packet number 0
packet.prepend((char)0);
// Byte 0 of MRAG - magazine number, and packet number 0
packet.prepend(m_magazineNumber & 0x07);
packet[2] = m_document->pageNumber() & 0x00f;
packet[3] = (m_document->pageNumber() & 0x0f0) >> 4;
packet[4] = subPageNumber & 0xf;