Simplify storage of NOS control bits

This removes the character array from the LevelOnePage class and stores the
characters in packets 0 to 24 natively, adding a packet when a character is
first added to a row and removing a packet when a row becomes space
characters.

src/qteletextdecoder/levelonepage.cpp

@@ -33,31 +33,11 @@ LevelOnePage::LevelOnePage()
 	clearPage();
 }
 
-LevelOnePage::LevelOnePage(const PageBase &other)
-{
-	m_enhancements.reserve(maxEnhancements());
-	clearPage();
-
-	for (int i=0; i<26; i++)
-		if (other.packetExists(i))
-			setPacket(i, other.packet(i));
-	for (int i=26; i<30; i++)
-		for (int j=0; j<16; j++)
-			if (other.packetExists(i, j))
-				setPacket(i, j, other.packet(i));
-
-	for (int i=PageBase::C4ErasePage; i<=PageBase::C14NOS; i++)
-		setControlBit(i, other.controlBit(i));
-}
-
 // So far we only call clearPage() once, within the constructor
 void LevelOnePage::clearPage()
 {
-	for (int r=0; r<25; r++)
+	for (int b=C4ErasePage; b<=C14NOS; b++)
-		for (int c=0; c<40; c++)
+		setControlBit(b, false);
-			m_level1Page[r][c] = 0x20;
-	for (int i=C4ErasePage; i<=C14NOS; i++)
-		setControlBit(i, false);
 	for (int i=0; i<8; i++)
 		m_composeLink[i] = { (i<4) ? i : 0, false, i>=4, 0x0ff, 0x0000 };
 	for (int i=0; i<6; i++)
@@ -91,38 +71,24 @@ bool LevelOnePage::isEmpty() const
 		return false;
 
 	for (int r=0; r<25; r++)
-		for (int c=0; c<40; c++)
+		if (!PageX26Base::packet(r).isEmpty())
-			if (m_level1Page[r][c] != 0x20)
+			return false;
-				return false;
 
 	return true;
 }
 
-QByteArray LevelOnePage::packet(int packetNumber) const
+QByteArray LevelOnePage::packet(int y, int d) const
 {
 	QByteArray result(40, 0x00);
 
-	if (packetNumber <= 24) {
+	if (y == 26) {
-		for (int c=0; c<40; c++)
+		if (!packetFromEnhancementListNeeded(d))
-			result[c] = m_level1Page[packetNumber][c];
-		return result;
-	}
-
-	return PageBase::packet(packetNumber);
-}
-
-QByteArray LevelOnePage::packet(int packetNumber, int designationCode) const
-{
-	QByteArray result(40, 0x00);
-
-	if (packetNumber == 26) {
-		if (!packetFromEnhancementListNeeded(designationCode))
 			return result; // Blank result
 
-		return packetFromEnhancementList(designationCode);
+		return packetFromEnhancementList(d);
 	}
 
-	if (packetNumber == 27 && designationCode == 0) {
+	if (y == 27 && d == 0) {
 		for (int i=0; i<6; i++) {
 			result[i*6+1] = m_fastTextLink[i].pageNumber & 0x00f;
 			result[i*6+2] = (m_fastTextLink[i].pageNumber & 0x0f0) >> 4;
@@ -137,9 +103,9 @@ QByteArray LevelOnePage::packet(int packetNumber, int designationCode) const
 		return result;
 	}
 
-	if (packetNumber == 27 && (designationCode == 4 || designationCode == 5)) {
+	if (y == 27 && (d == 4 || d == 5)) {
-		for (int i=0; i<(designationCode == 4 ? 6 : 2); i++) {
+		for (int i=0; i<(d == 4 ? 6 : 2); i++) {
-			int pageLinkNumber = i+(designationCode == 4 ? 0 : 6);
+			int pageLinkNumber = i+(d == 4 ? 0 : 6);
 
 			result[i*6+1] = (m_composeLink[pageLinkNumber].level3p5 << 3) | (m_composeLink[pageLinkNumber].level2p5 << 2) | m_composeLink[pageLinkNumber].function;
 			result[i*6+2] = ((m_composeLink[pageLinkNumber].pageNumber & 0x100) >> 3) | 0x10 | (m_composeLink[pageLinkNumber].pageNumber & 0x00f);
@@ -153,8 +119,8 @@ QByteArray LevelOnePage::packet(int packetNumber, int designationCode) const
 		return result;
 	}
 
-	if (packetNumber == 28 && (designationCode == 0 || designationCode == 4)) {
+	if (y == 28 && (d == 0 || d == 4)) {
-		int CLUToffset = (designationCode == 0) ? 16 : 0;
+		int CLUToffset = (d == 0) ? 16 : 0;
 
 		result[1] = 0x00;
 		result[2] = ((m_defaultCharSet & 0x3) << 4) | (m_defaultNOS << 1);
@@ -174,34 +140,32 @@ QByteArray LevelOnePage::packet(int packetNumber, int designationCode) const
 		return result;
 	}
 
-	return PageBase::packet(packetNumber, designationCode);
+	return PageX26Base::packet(y, d);
 }
 
-bool LevelOnePage::setPacket(int packetNumber, QByteArray packetContents)
+/*
+bool LevelOnePage::setPacket(int y, QByteArray pkt)
 {
-	if (packetNumber <= 24) {
+	if (y == 25)
-		for (int c=0; c<40; c++)
+		qDebug("LevelOnePage unhandled setPacket X/25");
-			m_level1Page[packetNumber][c] = packetContents.at(c);
+
+	return PageX26Base::setPacket(y, pkt);
+}
+*/
+
+bool LevelOnePage::setPacket(int y, int d, QByteArray pkt)
+{
+	if (y == 26) {
+		setEnhancementListFromPacket(d, pkt);
 		return true;
 	}
 
-	qDebug("LevelOnePage unhandled setPacket X/%d", packetNumber);
+	if (y == 27 && d == 0) {
-	return PageBase::setPacket(packetNumber, packetContents);
-}
-
-bool LevelOnePage::setPacket(int packetNumber, int designationCode, QByteArray packetContents)
-{
-	if (packetNumber == 26) {
-		setEnhancementListFromPacket(designationCode, packetContents);
-		return true;
-	}
-
-	if (packetNumber == 27 && designationCode == 0) {
 		for (int i=0; i<6; i++) {
-			int relativeMagazine = (packetContents.at(i*6+4) >> 3) | ((packetContents.at(i*6+6) & 0xc) >> 1);
+			int relativeMagazine = (pkt.at(i*6+4) >> 3) | ((pkt.at(i*6+6) & 0xc) >> 1);
-			int pageNumber = (packetContents.at(i*6+2) << 4) | packetContents.at(i*6+1);
+			int pageNumber = (pkt.at(i*6+2) << 4) | pkt.at(i*6+1);
 			m_fastTextLink[i].pageNumber = (relativeMagazine << 8) | pageNumber;
-			m_fastTextLink[i].subPageNumber = packetContents.at(i*6+3) | ((packetContents.at(i*6+4) & 0x7) << 4) | (packetContents.at(i*6+5) << 8) | ((packetContents.at(i*6+6) & 0x3) << 12);
+			m_fastTextLink[i].subPageNumber = pkt.at(i*6+3) | ((pkt.at(i*6+4) & 0x7) << 4) | (pkt.at(i*6+5) << 8) | ((pkt.at(i*6+6) & 0x3) << 12);
 			// TODO remove this warning when we can preserve FastText subpage links
 			if (m_fastTextLink[i].subPageNumber != 0x3f7f)
 				qDebug("FastText link %d has custom subPageNumber %x - will NOT be saved!", i, m_fastTextLink[i].subPageNumber);
@@ -209,71 +173,59 @@ bool LevelOnePage::setPacket(int packetNumber, int designationCode, QByteArray p
 		return true;
 	}
 
-	if (packetNumber == 27 && (designationCode == 4 || designationCode == 5)) {
+	if (y == 27 && (d == 4 || d == 5)) {
-		for (int i=0; i<(designationCode == 4 ? 6 : 2); i++) {
+		for (int i=0; i<(d == 4 ? 6 : 2); i++) {
-			int pageLinkNumber = i+(designationCode == 4 ? 0 : 6);
+			int pageLinkNumber = i+(d == 4 ? 0 : 6);
-			int pageFunction = packetContents.at(i*6+1) & 0x03;
+			int pageFunction = pkt.at(i*6+1) & 0x03;
 			if (i >= 4)
 				m_composeLink[pageLinkNumber].function = pageFunction;
 			else if (i != pageFunction)
 				qDebug("X/27/4 link number %d fixed at function %d. Attempted to set to %d.", pageLinkNumber, pageLinkNumber, pageFunction);
 
-			m_composeLink[pageLinkNumber].level2p5 = packetContents.at(i*6+1) & 0x04;
+			m_composeLink[pageLinkNumber].level2p5 = pkt.at(i*6+1) & 0x04;
-			m_composeLink[pageLinkNumber].level3p5 = packetContents.at(i*6+1) & 0x08;
+			m_composeLink[pageLinkNumber].level3p5 = pkt.at(i*6+1) & 0x08;
 
-			m_composeLink[pageLinkNumber].pageNumber = ((packetContents.at(i*6+3) & 0x03) << 9) | ((packetContents.at(i*6+2) & 0x20) << 3) | ((packetContents.at(i*6+3) & 0x3c) << 2) | (packetContents.at(i*6+2) & 0x0f);
+			m_composeLink[pageLinkNumber].pageNumber = ((pkt.at(i*6+3) & 0x03) << 9) | ((pkt.at(i*6+2) & 0x20) << 3) | ((pkt.at(i*6+3) & 0x3c) << 2) | (pkt.at(i*6+2) & 0x0f);
 
-			m_composeLink[pageLinkNumber].subPageCodes = (packetContents.at(i*6+4) >> 2) | (packetContents.at(i*6+5) << 4) | (packetContents.at(i*6+6) << 10);
+			m_composeLink[pageLinkNumber].subPageCodes = (pkt.at(i*6+4) >> 2) | (pkt.at(i*6+5) << 4) | (pkt.at(i*6+6) << 10);
 		}
 		return true;
 	}
 
-	if (packetNumber == 28 && (designationCode == 0 || designationCode == 4)) {
+	if (y == 28 && (d == 0 || d == 4)) {
-		int CLUToffset = (designationCode == 0) ? 16 : 0;
+		int CLUToffset = (d == 0) ? 16 : 0;
 
-		m_defaultCharSet = ((packetContents.at(2) >> 4) & 0x3) | ((packetContents.at(3) << 2) & 0xc);
+		m_defaultCharSet = ((pkt.at(2) >> 4) & 0x3) | ((pkt.at(3) << 2) & 0xc);
-		m_defaultNOS = (packetContents.at(2) >> 1) & 0x7;
+		m_defaultNOS = (pkt.at(2) >> 1) & 0x7;
-		m_secondCharSet = ((packetContents.at(3) >> 5) & 0x1) | ((packetContents.at(4) << 1) & 0xe);
+		m_secondCharSet = ((pkt.at(3) >> 5) & 0x1) | ((pkt.at(4) << 1) & 0xe);
-		m_secondNOS = (packetContents.at(3) >> 2) & 0x7;
+		m_secondNOS = (pkt.at(3) >> 2) & 0x7;
 
-		m_leftSidePanelDisplayed = (packetContents.at(4) >> 3) & 1;
+		m_leftSidePanelDisplayed = (pkt.at(4) >> 3) & 1;
-		m_rightSidePanelDisplayed = (packetContents.at(4) >> 4) & 1;
+		m_rightSidePanelDisplayed = (pkt.at(4) >> 4) & 1;
-		m_sidePanelStatusL25 = (packetContents.at(4) >> 5) & 1;
+		m_sidePanelStatusL25 = (pkt.at(4) >> 5) & 1;
-		m_sidePanelColumns = packetContents.at(5) & 0xf;
+		m_sidePanelColumns = pkt.at(5) & 0xf;
 
 		for (int c=0; c<16; c++)
-			m_CLUT[CLUToffset+c] = ((packetContents.at(c*2+5) << 4) & 0x300) | ((packetContents.at(c*2+6) << 10) & 0xc00) | ((packetContents.at(c*2+6) << 2) & 0x0f0) | (packetContents.at(c*2+7) & 0x00f);
+			m_CLUT[CLUToffset+c] = ((pkt.at(c*2+5) << 4) & 0x300) | ((pkt.at(c*2+6) << 10) & 0xc00) | ((pkt.at(c*2+6) << 2) & 0x0f0) | (pkt.at(c*2+7) & 0x00f);
 
-		m_defaultScreenColour = (packetContents.at(37) >> 4) | ((packetContents.at(38) << 2) & 0x1c);
+		m_defaultScreenColour = (pkt.at(37) >> 4) | ((pkt.at(38) << 2) & 0x1c);
-		m_defaultRowColour = ((packetContents.at(38)) >> 3) | ((packetContents.at(39) << 3) & 0x18);
+		m_defaultRowColour = ((pkt.at(38)) >> 3) | ((pkt.at(39) << 3) & 0x18);
-		m_blackBackgroundSubst = (packetContents.at(39) >> 2) & 1;
+		m_blackBackgroundSubst = (pkt.at(39) >> 2) & 1;
-		m_colourTableRemap = (packetContents.at(39) >> 3) & 7;
+		m_colourTableRemap = (pkt.at(39) >> 3) & 7;
 
 		return true;
 	}
 
-	qDebug("LevelOnePage unhandled setPacket X/%d/%d", packetNumber, designationCode);
+	qDebug("LevelOnePage unhandled setPacket X/%d/%d", y, d);
-	return PageBase::setPacket(packetNumber, designationCode, packetContents);
+	return PageX26Base::setPacket(y, d, pkt);
 }
 
-bool LevelOnePage::packetExists(int packetNumber) const
+bool LevelOnePage::packetExists(int y, int d) const
 {
-	if (packetNumber <= 24) {
+	if (y == 26)
-		for (int c=0; c<40; c++)
+		return packetFromEnhancementListNeeded(d);
-			if (m_level1Page[packetNumber][c] != 0x20)
-				return true;
-		return false;
-	}
 
-	return PageBase::packetExists(packetNumber);
+	if (y == 27 && d == 0) {
-}
-
-bool LevelOnePage::packetExists(int packetNumber, int designationCode) const
-{
-	if (packetNumber == 26)
-		return packetFromEnhancementListNeeded(designationCode);
-
-	if (packetNumber == 27 && designationCode == 0) {
 		for (int i=0; i<6; i++)
 			if ((m_fastTextLink[i].pageNumber & 0x0ff) != 0xff)
 				return true;
@@ -281,63 +233,49 @@ bool LevelOnePage::packetExists(int packetNumber, int designationCode) const
 		return false;
 	}
 
-	if (packetNumber == 27 && (designationCode == 4 || designationCode == 5)) {
+	if (y == 27 && (d == 4 || d == 5)) {
-		for (int i=0; i<(designationCode == 4 ? 6 : 2); i++) {
+		for (int i=0; i<(d == 4 ? 6 : 2); i++) {
-			int pageLinkNumber = i+(designationCode == 4 ? 0 : 6);
+			int pageLinkNumber = i+(d == 4 ? 0 : 6);
 			if ((m_composeLink[pageLinkNumber].pageNumber & 0x0ff) != 0x0ff)
 				return true;
 		}
 		return false;
 	}
 
-	if (packetNumber == 28) {
+	if (y == 28) {
-		if (designationCode == 0) {
+		if (d == 0) {
 			if (m_leftSidePanelDisplayed || m_rightSidePanelDisplayed || m_defaultScreenColour !=0 || m_defaultRowColour !=0 || m_blackBackgroundSubst || m_colourTableRemap !=0 || m_defaultCharSet != 0 || m_secondCharSet != 0xf)
 				return true;
 			return !isPaletteDefault(16, 31);
 		}
-		if (designationCode == 4)
+		if (d == 4)
 			return !isPaletteDefault(0, 15);
 	}
 
-	return PageBase::packetExists(packetNumber, designationCode);
+	return PageX26Base::packetExists(y, d);
 }
 
-bool LevelOnePage::controlBit(int bitNumber) const
+bool LevelOnePage::setControlBit(int b, bool active)
 {
-	switch (bitNumber) {
+	switch (b) {
 		case C12NOS:
-			return (m_defaultNOS & 1) == 1;
+			m_defaultNOS &= 0x6;
+			if (active)
+				m_defaultNOS |= 0x1;
+			break;
 		case C13NOS:
-			return (m_defaultNOS & 2) == 2;
+			m_defaultNOS &= 0x5;
+			if (active)
+				m_defaultNOS |= 0x2;
+			break;
 		case C14NOS:
-			return (m_defaultNOS & 4) == 4;
+			m_defaultNOS &= 0x3;
-		default:
+			if (active)
-			return PageBase::controlBit(bitNumber);
+				m_defaultNOS |= 0x4;
+			break;
 	}
-}
 
-bool LevelOnePage::setControlBit(int bitNumber, bool active)
+	return PageX26Base::setControlBit(b, active);
-{
-	switch (bitNumber) {
-		case C12NOS:
-			m_defaultNOS &= 0x06;
-			if (active)
-				m_defaultNOS |= 0x01;
-			return true;
-		case C13NOS:
-			m_defaultNOS &= 0x05;
-			if (active)
-				m_defaultNOS |= 0x02;
-			return true;
-		case C14NOS:
-			m_defaultNOS &= 0x03;
-			if (active)
-				m_defaultNOS |= 0x04;
-			return true;
-		default:
-			return PageBase::setControlBit(bitNumber, active);
-	}
 }
 
 /* void LevelOnePage::setSubPageNumber(int newSubPageNumber) { m_subPageNumber = newSubPageNumber; } */
@@ -348,6 +286,10 @@ void LevelOnePage::setDefaultCharSet(int newDefaultCharSet) { m_defaultCharSet =
 void LevelOnePage::setDefaultNOS(int defaultNOS)
 {
 	m_defaultNOS = defaultNOS;
+
+	PageX26Base::setControlBit(C12NOS, m_defaultNOS & 0x1);
+	PageX26Base::setControlBit(C13NOS, m_defaultNOS & 0x2);
+	PageX26Base::setControlBit(C14NOS, m_defaultNOS & 0x4);
 }
 
 void LevelOnePage::setSecondCharSet(int newSecondCharSet)
@@ -358,7 +300,27 @@ void LevelOnePage::setSecondCharSet(int newSecondCharSet)
 }
 
 void LevelOnePage::setSecondNOS(int newSecondNOS) { m_secondNOS = newSecondNOS; }
-void LevelOnePage::setCharacter(int row, int column, unsigned char newCharacter) { m_level1Page[row][column] = newCharacter; }
+
+void LevelOnePage::setCharacter(int r, int c, unsigned char newCharacter)
+{
+	QByteArray pkt;
+
+	if (!packetExists(r)) {
+		if (newCharacter == 0x20)
+			return;
+		pkt = QByteArray(40, 0x20);
+		pkt[c] = newCharacter;
+		setPacket(r, pkt);
+	} else {
+		pkt = packet(r);
+		pkt[c] = newCharacter;
+		if (pkt == QByteArray(40, 0x20))
+			clearPacket(r);
+		else
+			setPacket(r, pkt);
+	}
+}
+
 void LevelOnePage::setDefaultScreenColour(int newDefaultScreenColour) { m_defaultScreenColour = newDefaultScreenColour; }
 void LevelOnePage::setDefaultRowColour(int newDefaultRowColour) { m_defaultRowColour = newDefaultRowColour; }
 void LevelOnePage::setColourTableRemap(int newColourTableRemap) { m_colourTableRemap = newColourTableRemap; }

src/qteletextdecoder/levelonepage.h

@@ -33,26 +33,25 @@ class LevelOnePage : public PageX26Base //: public QObject
 	//Q_OBJECT
 
 public:
+	using PageX26Base::packet;
+	using PageX26Base::setPacket;
+	using PageX26Base::packetExists;
+
 	enum CycleTypeEnum { CTcycles, CTseconds };
 
 	LevelOnePage();
-	LevelOnePage(const PageBase &other);
 
 	bool isEmpty() const override;
 
-	QByteArray packet(int packetNumber) const override;
+	QByteArray packet(int y, int d) const override;
-	QByteArray packet(int packetNumber, int designationCode) const override;
+	bool setPacket(int y, int d, QByteArray pkt) override;
-	bool packetExists(int packetNumber) const override;
+	bool packetExists(int y, int d) const override;
-	bool packetExists(int packetNumber, int designationCode) const override;
-	bool setPacket(int packetNumber, QByteArray packetContents) override;
-	bool setPacket(int packetNumber, int designationCode, QByteArray packetContents) override;
 
-	bool controlBit(int bitNumber) const override;
+	bool setControlBit(int b, bool active) override;
-	bool setControlBit(int bitNumber, bool active) override;
 
 	void clearPage();
 
-	int maxEnhancements() const { return 208; };
+	int maxEnhancements() const override { return 208; };
 
 /*	void setSubPageNumber(int); */
 	int cycleValue() const { return m_cycleValue; };
@@ -67,8 +66,8 @@ public:
 	void setSecondCharSet(int newSecondCharSet);
 	int secondNOS() const { return m_secondNOS; }
 	void setSecondNOS(int newSecondNOS);
-	unsigned char character(int row, int column) const { return m_level1Page[row][column]; }
+	unsigned char character(int r, int c) const { return PageX26Base::packetExists(r) ? PageX26Base::packet(r).at(c) : 0x20; }
-	void setCharacter(int row, int column, unsigned char newCharacter);
+	void setCharacter(int r, int c, unsigned char newChar);
 	int defaultScreenColour() const { return m_defaultScreenColour; }
 	void setDefaultScreenColour(int newDefaultScreenColour);
 	int defaultRowColour() const { return m_defaultRowColour; }
@@ -105,7 +104,6 @@ public:
 	void setComposeLinkSubPageCodes(int linkNumber, int newSubPageCodes);
 
 private:
-	unsigned char m_level1Page[25][40];
 /*	int m_subPageNumber; */
 	int m_cycleValue;
 	CycleTypeEnum m_cycleType;

src/qteletextdecoder/pagebase.cpp

@@ -23,100 +23,62 @@
 
 PageBase::PageBase()
 {
-	// We use nullptrs to keep track of allocated packets, so initialise them this way
+	for (int b=PageBase::C4ErasePage; b<=PageBase::C14NOS; b++)
-	for (int i=0; i<26; i++)
+		m_controlBits[b] = false;
-		m_displayPackets[i] = nullptr;
-	for (int i=0; i<4; i++)
-		for (int j=0; j<16; j++)
-			m_designationPackets[i][j] = nullptr;
-
-	for (int i=PageBase::C4ErasePage; i<=PageBase::C14NOS; i++)
-		m_controlBits[i] = false;
-}
-
-PageBase::~PageBase()
-{
-	for (int i=0; i<26; i++)
-		if (m_displayPackets[i] != nullptr)
-			delete m_displayPackets[i];
-	for (int i=0; i<4; i++)
-		for (int j=0; j<16; j++)
-			if (m_designationPackets[i][j] != nullptr)
-				delete m_designationPackets[i][j];
 }
 
 bool PageBase::isEmpty() const
 {
-	for (int i=0; i<26; i++)
+	for (int y=0; y<26; y++)
-		if (m_displayPackets[i] != nullptr)
+		if (!m_displayPackets[y].isEmpty())
 			return false;
-	for (int i=0; i<4; i++)
+	for (int y=0; y<3; y++)
-		for (int j=0; j<16; j++)
+		for (int d=0; d<16; d++)
-			if (m_designationPackets[i][j] != nullptr)
+			if (!m_designationPackets[y][d].isEmpty())
 				return false;
 
 	return true;
 }
 
-QByteArray PageBase::packet(int i) const
+bool PageBase::setPacket(int y, QByteArray pkt)
 {
-	if (m_displayPackets[i] == nullptr)
+	m_displayPackets[y] = pkt;
-		return QByteArray(); // Blank result
-
-	return *m_displayPackets[i];
-}
-
-QByteArray PageBase::packet(int i, int j) const
-{
-	if (m_designationPackets[i-26][j] == nullptr)
-		return QByteArray(); // Blank result
-
-	return *m_designationPackets[i-26][j];
-}
-
-
-bool PageBase::setPacket(int i, QByteArray packetContents)
-{
-	if (m_displayPackets[i] == nullptr)
-		m_displayPackets[i] = new QByteArray(40, 0x00);
-	*m_displayPackets[i] = packetContents;
 
 	return true;
 }
 
-bool PageBase::setPacket(int i, int j, QByteArray packetContents)
+bool PageBase::setPacket(int y, int d, QByteArray pkt)
 {
-	if (m_designationPackets[i-26][j] == nullptr)
+	m_designationPackets[y-26][d] = pkt;
-		m_designationPackets[i-26][j] = new QByteArray(40, 0x00);
-	*m_designationPackets[i-26][j] = packetContents;
 
 	return true;
 }
 
-/*
+bool PageBase::clearPacket(int y)
-bool PageBase::deletePacket(int i)
 {
-	if (m_displayPackets[i] != nullptr) {
+	m_displayPackets[y] = QByteArray();
-		delete m_displayPackets[i];
-		m_displayPackets[i] = nullptr;
-	}
 
 	return true;
 }
 
-bool PageBase::deletePacket(int i)
+bool PageBase::clearPacket(int y, int d)
 {
-	if (m_designationPackets[i-26][j] != nullptr) {
+	m_designationPackets[y-26][d] = QByteArray();
-		delete m_designationPackets[i-26][j];
-		m_designationPackets[i-26][j] = nullptr;
-	}
 
 	return true;
 }
-*/
 
-bool PageBase::setControlBit(int bitNumber, bool active)
+void PageBase::clearAllPackets()
 {
-	m_controlBits[bitNumber] = active;
+	for (int y=0; y<26; y++)
+		clearPacket(y);
+	for (int y=0; y<3; y++)
+		for (int d=0; d<16; d++)
+			clearPacket(y, d);
+}
+
+bool PageBase::setControlBit(int b, bool active)
+{
+	m_controlBits[b] = active;
 	return true;
 }

src/qteletextdecoder/pagebase.h

@@ -31,25 +31,25 @@ public:
 	enum ControlBitsEnum { C4ErasePage, C5Newsflash, C6Subtitle, C7SuppressHeader, C8Update, C9InterruptedSequence, C10InhibitDisplay, C11SerialMagazine, C12NOS, C13NOS, C14NOS };
 
 	PageBase();
-	virtual ~PageBase();
 
 	virtual bool isEmpty() const;
 
-	virtual QByteArray packet(int i) const;
+	virtual QByteArray packet(int y) const { return m_displayPackets[y]; }
-	virtual QByteArray packet(int i, int j) const;
+	virtual QByteArray packet(int y, int d) const { return m_designationPackets[y-26][d]; }
-	virtual bool packetExists(int i) const { return m_displayPackets[i] != nullptr; }
+	virtual bool setPacket(int y, QByteArray pkt);
-	virtual bool packetExists(int i, int j) const { return m_designationPackets[i-26][j] != nullptr; }
+	virtual bool setPacket(int y, int d, QByteArray pkt);
-	virtual bool setPacket(int i, QByteArray packetContents);
+	virtual bool packetExists(int y) const { return !m_displayPackets[y].isEmpty(); }
-	virtual bool setPacket(int i, int j, QByteArray packetContents);
+	virtual bool packetExists(int y, int d) const { return !m_designationPackets[y-26][d].isEmpty(); }
-//	bool deletePacket(int);
+	bool clearPacket(int y);
-//	bool deletePacket(int, int);
+	bool clearPacket(int y, int d);
+	void clearAllPackets();
 
-	virtual bool controlBit(int bitNumber) const { return m_controlBits[bitNumber]; }
+	virtual bool controlBit(int b) const { return m_controlBits[b]; }
-	virtual bool setControlBit(int bitNumber, bool active);
+	virtual bool setControlBit(int b, bool active);
 
 private:
 	bool m_controlBits[11];
-	QByteArray *m_displayPackets[26], *m_designationPackets[4][16];
+	QByteArray m_displayPackets[26], m_designationPackets[3][16];
 };
 
 #endif

src/qteletextdecoder/pagex26base.cpp

@@ -21,20 +21,19 @@
 
 #include "pagex26base.h"
 
-QByteArray PageX26Base::packetFromEnhancementList(int packetNumber) const
+QByteArray PageX26Base::packetFromEnhancementList(int p) const
 {
 	QByteArray result(40, 0x00);
 
-	int enhanceListPointer;
 	X26Triplet lastTriplet;
 
-	for (int i=0; i<13; i++) {
+	for (int t=0; t<13; t++) {
-		enhanceListPointer = packetNumber*13+i;
+		const int enhanceListPointer = p*13+t;
 
 		if (enhanceListPointer < m_enhancements.size()) {
-			result[i*3+1] = m_enhancements.at(enhanceListPointer).address();
+			result[t*3+1] = m_enhancements.at(enhanceListPointer).address();
-			result[i*3+2] = m_enhancements.at(enhanceListPointer).mode() | ((m_enhancements.at(enhanceListPointer).data() & 1) << 5);
+			result[t*3+2] = m_enhancements.at(enhanceListPointer).mode() | ((m_enhancements.at(enhanceListPointer).data() & 1) << 5);
-			result[i*3+3] = m_enhancements.at(enhanceListPointer).data() >> 1;
+			result[t*3+3] = m_enhancements.at(enhanceListPointer).data() >> 1;
 
 			// If this is the last triplet, get a copy to repeat to the end of the packet
 			if (enhanceListPointer == m_enhancements.size()-1) {
@@ -48,32 +47,31 @@ QByteArray PageX26Base::packetFromEnhancementList(int packetNumber) const
 			}
 		} else {
 			// We've gone past the end of the triplet list, so repeat the Termination Marker to the end
-			result[i*3+1] = lastTriplet.address();
+			result[t*3+1] = lastTriplet.address();
-			result[i*3+2] = lastTriplet.mode() | ((lastTriplet.data() & 1) << 5);
+			result[t*3+2] = lastTriplet.mode() | ((lastTriplet.data() & 1) << 5);
-			result[i*3+3] = lastTriplet.data() >> 1;
+			result[t*3+3] = lastTriplet.data() >> 1;
 		}
 	}
 
 	return result;
 }
 
-void PageX26Base::setEnhancementListFromPacket(int packetNumber, QByteArray packetContents)
+void PageX26Base::setEnhancementListFromPacket(int p, QByteArray pkt)
 {
 	// Preallocate entries in the m_enhancements list to hold our incoming triplets.
 	// We write "dummy" reserved 11110 Row Triplets in the allocated entries which then get overwritten by the packet contents.
 	// This is in case of missing packets so we can keep Local Object pointers valid.
-	while (m_enhancements.size() < (packetNumber+1)*13)
+	while (m_enhancements.size() < (p+1)*13)
 		m_enhancements.append(m_paddingX26Triplet);
 
-	int enhanceListPointer;
 	X26Triplet newX26Triplet;
 
-	for (int i=0; i<13; i++) {
+	for (int t=0; t<13; t++) {
-		enhanceListPointer = packetNumber*13+i;
+		const int enhanceListPointer = p*13+t;
 
-		newX26Triplet.setAddress(packetContents.at(i*3+1) & 0x3f);
+		newX26Triplet.setAddress(pkt.at(t*3+1) & 0x3f);
-		newX26Triplet.setMode(packetContents.at(i*3+2) & 0x1f);
+		newX26Triplet.setMode(pkt.at(t*3+2) & 0x1f);
-		newX26Triplet.setData(((packetContents.at(i*3+3) & 0x3f) << 1) | ((packetContents.at(i*3+2) & 0x20) >> 5));
+		newX26Triplet.setData(((pkt.at(t*3+3) & 0x3f) << 1) | ((pkt.at(t*3+2) & 0x20) >> 5));
 		m_enhancements.replace(enhanceListPointer, newX26Triplet);
 	}
 	if (newX26Triplet.mode() == 0x1f && newX26Triplet.address() == 0x3f && newX26Triplet.data() & 0x01)

src/qteletextdecoder/pagex26base.h

@@ -35,8 +35,8 @@ public:
 	virtual int maxEnhancements() const =0;
 
 protected:
-	QByteArray packetFromEnhancementList(int packetNumber) const;
+	QByteArray packetFromEnhancementList(int p) const;
-	void setEnhancementListFromPacket(int packetNumber, QByteArray packetContents);
+	void setEnhancementListFromPacket(int p, QByteArray pkt);
 	bool packetFromEnhancementListNeeded(int n) const { return ((m_enhancements.size()+12) / 13) > n; };
 
 	X26TripletList m_enhancements;

src/qteletextmaker/main.cpp

@@ -30,7 +30,7 @@ int main(int argc, char *argv[])
 	QApplication::setApplicationDisplayName(QApplication::applicationName());
 	QApplication::setOrganizationName("gkmac.co.uk");
 	QApplication::setOrganizationDomain("gkmac.co.uk");
-	QApplication::setApplicationVersion("0.7-beta");
+	QApplication::setApplicationVersion("0.7.1-beta");
 	QCommandLineParser parser;
 	parser.setApplicationDescription(QApplication::applicationName());
 	parser.addHelpOption();

src/qteletextmaker/mainwidget.h

@@ -52,7 +52,7 @@ public:
 
 	QSize sizeHint() { return QSize(480+(pageDecode()->leftSidePanelColumns()+pageDecode()->rightSidePanelColumns())*12, 250); }
 
-	void inputMethodEvent(QInputMethodEvent *event);
+	void inputMethodEvent(QInputMethodEvent *event) override;
 
 	TeletextDocument* document() const { return m_teletextDocument; }
 	TeletextPageDecode *pageDecode() { return &m_pageDecode; }

src/qteletextmaker/mainwindow.cpp

@@ -264,7 +264,7 @@ void MainWindow::exportImage()
 	QImage scaledImage[6];
 
 	for (int p=0; p<6; p++)
-		if (!interImage[p].isNull())
+		if (!interImage[p].isNull()) {
 			if (m_viewAspectRatio == 3)
 				// Aspect ratio is Pixel 1:2 so we only need to double the vertical height
 				scaledImage[p] = interImage[p].scaled(interImage[p].width(), interImage[p].height()*2, Qt::IgnoreAspectRatio, Qt::FastTransformation);
@@ -276,6 +276,7 @@ void MainWindow::exportImage()
 				// Don't smooth GIF as it's bound to break the 256 colour limit
 				scaledImage[p] = doubleHeightImage.scaled((int)((float)doubleHeightImage.width() * aspectRatioHorizontalScaling[m_viewAspectRatio] * 2), doubleHeightImage.height(), Qt::IgnoreAspectRatio, (suffix == "gif") ? Qt::FastTransformation : Qt::SmoothTransformation);
 			}
+		}
 
 	if (suffix == "png") {
 		if (scaledImage[0].save(exportFileName, "PNG"))

src/qteletextmaker/x26model.h

@@ -35,11 +35,11 @@ public:
 	int rowCount(const QModelIndex &parent = QModelIndex()) const override ;
 	int columnCount(const QModelIndex &parent = QModelIndex()) const override;
 	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
-	bool setData(const QModelIndex &index, const QVariant &value, int role);
+	bool setData(const QModelIndex &index, const QVariant &value, int role) override;
-	QVariant headerData(int section, Qt::Orientation orientation, int role) const;
+	QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
-	bool insertRows(int position, int rows, const QModelIndex &parent);
+	bool insertRows(int position, int rows, const QModelIndex &parent) override;
 	bool insertRows(int position, int rows, const QModelIndex &parent, X26Triplet triplet);
-	bool removeRows(int position, int rows, const QModelIndex &index);
+	bool removeRows(int position, int rows, const QModelIndex &index) override;
 //	Qt::ItemFlags flags(const QModelIndex &index) const;
 
 	// The x26commands classes manipulate the model but beginInsertRows and endInsertRows