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levelonepage.cpp
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levelonepage.cpp
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/*
* Copyright (C) 2020-2024 Gavin MacGregor
*
* This file is part of QTeletextMaker.
*
* QTeletextMaker is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* QTeletextMaker is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with QTeletextMaker. If not, see <https://www.gnu.org/licenses/>.
*/
#include <QByteArray>
#include <QColor>
#include <QList>
#include <QString>
#include <algorithm>
#include "levelonepage.h"
#include "x26triplets.h"
LevelOnePage::LevelOnePage()
{
m_enhancements.reserve(maxEnhancements());
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 c=0; c<40; c++)
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++)
m_fastTextLink[i] = { 0x0ff, 0x3f7f };
/* m_subPageNumber = 0x0000; */
m_cycleValue = 20;
m_cycleType = CTseconds;
m_defaultCharSet = 0;
m_defaultNOS = 0;
m_secondCharSet = 0xf;
m_secondNOS = 0x7;
m_defaultScreenColour = 0;
m_defaultRowColour = 0;
m_blackBackgroundSubst = false;
m_colourTableRemap = 0;
m_leftSidePanelDisplayed = m_rightSidePanelDisplayed = false;
m_sidePanelStatusL25 = true;
m_sidePanelColumns = 0;
std::copy(m_defaultCLUT, m_defaultCLUT+32, m_CLUT);
// If clearPage() is called outside constructor, we need to implement m_enhancements.clear();
}
bool LevelOnePage::isEmpty() const
{
if (!m_enhancements.isEmpty())
return false;
if (!isPaletteDefault(0, 31))
return false;
for (int r=0; r<25; r++)
for (int c=0; c<40; c++)
if (m_level1Page[r][c] != 0x20)
return false;
return true;
}
QByteArray LevelOnePage::packet(int packetNumber) const
{
QByteArray result(40, 0x00);
if (packetNumber <= 24) {
for (int c=0; c<40; c++)
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);
}
if (packetNumber == 27 && designationCode == 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;
result[i*6+3] = m_fastTextLink[i].subPageNumber & 0x000f;
result[i*6+4] = ((m_fastTextLink[i].subPageNumber & 0x0070) >> 4) | ((m_fastTextLink[i].pageNumber & 0x100) >> 5);
result[i*6+5] = (m_fastTextLink[i].subPageNumber & 0x0f00) >> 8;
result[i*6+6] = ((m_fastTextLink[i].subPageNumber & 0x3000) >> 12) | ((m_fastTextLink[i].pageNumber & 0x600) >> 7);
}
result[37] = 0xf;
result[38] = result[39] = 0;
return result;
}
if (packetNumber == 27 && (designationCode == 4 || designationCode == 5)) {
for (int i=0; i<(designationCode == 4 ? 6 : 2); i++) {
int pageLinkNumber = i+(designationCode == 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);
result[i*6+3] = ((m_composeLink[pageLinkNumber].pageNumber & 0x0f0) >> 2) | ((m_composeLink[pageLinkNumber].pageNumber & 0x600) >> 9);
result[i*6+4] = ((m_composeLink[pageLinkNumber].subPageCodes & 0x000f) << 2);
result[i*6+5] = ((m_composeLink[pageLinkNumber].subPageCodes & 0x03f0) >> 4);
result[i*6+6] = ((m_composeLink[pageLinkNumber].subPageCodes & 0xfc00) >> 10);
}
return result;
}
if (packetNumber == 28 && (designationCode == 0 || designationCode == 4)) {
int CLUToffset = (designationCode == 0) ? 16 : 0;
result[1] = 0x00;
result[2] = ((m_defaultCharSet & 0x3) << 4) | (m_defaultNOS << 1);
result[3] = ((m_secondCharSet & 0x1) << 5) | (m_secondNOS << 2) | (m_defaultCharSet >> 2);
result[4] = (m_sidePanelStatusL25 << 5) | (m_rightSidePanelDisplayed << 4) | (m_leftSidePanelDisplayed << 3) | (m_secondCharSet >> 1);
result[5] = m_sidePanelColumns | ((m_CLUT[CLUToffset] & 0x300) >> 4);
for (int c=0; c<16; c++) {
result[c*2+6] = ((m_CLUT[CLUToffset+c] & 0x0f0) >> 2) | ((m_CLUT[CLUToffset+c] & 0xf00) >> 10);
result[c*2+7] = ((m_CLUT[CLUToffset+c+1] & 0x300) >> 4) | (m_CLUT[CLUToffset+c] & 0x00f);
}
result[37] = ((m_defaultScreenColour & 0x03) << 4) | (m_CLUT[CLUToffset+15] & 0x00f);
result[38] = ((m_defaultRowColour & 0x07) << 3) | (m_defaultScreenColour >> 2);
result[39] = (m_colourTableRemap << 3) | (m_blackBackgroundSubst << 2) | (m_defaultRowColour >> 3);
return result;
}
return PageBase::packet(packetNumber, designationCode);
}
bool LevelOnePage::setPacket(int packetNumber, QByteArray packetContents)
{
if (packetNumber <= 24) {
for (int c=0; c<40; c++)
m_level1Page[packetNumber][c] = packetContents.at(c);
return true;
}
qDebug("LevelOnePage unhandled setPacket X/%d", packetNumber);
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 pageNumber = (packetContents.at(i*6+2) << 4) | packetContents.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);
// 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);
}
return true;
}
if (packetNumber == 27 && (designationCode == 4 || designationCode == 5)) {
for (int i=0; i<(designationCode == 4 ? 6 : 2); i++) {
int pageLinkNumber = i+(designationCode == 4 ? 0 : 6);
int pageFunction = packetContents.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].level3p5 = packetContents.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].subPageCodes = (packetContents.at(i*6+4) >> 2) | (packetContents.at(i*6+5) << 4) | (packetContents.at(i*6+6) << 10);
}
return true;
}
if (packetNumber == 28 && (designationCode == 0 || designationCode == 4)) {
int CLUToffset = (designationCode == 0) ? 16 : 0;
m_defaultCharSet = ((packetContents.at(2) >> 4) & 0x3) | ((packetContents.at(3) << 2) & 0xc);
m_defaultNOS = (packetContents.at(2) >> 1) & 0x7;
m_secondCharSet = ((packetContents.at(3) >> 5) & 0x1) | ((packetContents.at(4) << 1) & 0xe);
m_secondNOS = (packetContents.at(3) >> 2) & 0x7;
m_leftSidePanelDisplayed = (packetContents.at(4) >> 3) & 1;
m_rightSidePanelDisplayed = (packetContents.at(4) >> 4) & 1;
m_sidePanelStatusL25 = (packetContents.at(4) >> 5) & 1;
m_sidePanelColumns = packetContents.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_defaultScreenColour = (packetContents.at(37) >> 4) | ((packetContents.at(38) << 2) & 0x1c);
m_defaultRowColour = ((packetContents.at(38)) >> 3) | ((packetContents.at(39) << 3) & 0x18);
m_blackBackgroundSubst = (packetContents.at(39) >> 2) & 1;
m_colourTableRemap = (packetContents.at(39) >> 3) & 7;
return true;
}
qDebug("LevelOnePage unhandled setPacket X/%d/%d", packetNumber, designationCode);
return PageBase::setPacket(packetNumber, designationCode, packetContents);
}
bool LevelOnePage::packetExists(int packetNumber) const
{
if (packetNumber <= 24) {
for (int c=0; c<40; c++)
if (m_level1Page[packetNumber][c] != 0x20)
return true;
return false;
}
return PageBase::packetExists(packetNumber);
}
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;
return false;
}
if (packetNumber == 27 && (designationCode == 4 || designationCode == 5)) {
for (int i=0; i<(designationCode == 4 ? 6 : 2); i++) {
int pageLinkNumber = i+(designationCode == 4 ? 0 : 6);
if ((m_composeLink[pageLinkNumber].pageNumber & 0x0ff) != 0x0ff)
return true;
}
return false;
}
if (packetNumber == 28) {
if (designationCode == 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)
return !isPaletteDefault(0, 15);
}
return PageBase::packetExists(packetNumber, designationCode);
}
bool LevelOnePage::controlBit(int bitNumber) const
{
switch (bitNumber) {
case C12NOS:
return (m_defaultNOS & 1) == 1;
case C13NOS:
return (m_defaultNOS & 2) == 2;
case C14NOS:
return (m_defaultNOS & 4) == 4;
default:
return PageBase::controlBit(bitNumber);
}
}
bool LevelOnePage::setControlBit(int bitNumber, bool 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; } */
void LevelOnePage::setCycleValue(int newValue) { m_cycleValue = newValue; };
void LevelOnePage::setCycleType(CycleTypeEnum newType) { m_cycleType = newType; }
void LevelOnePage::setDefaultCharSet(int newDefaultCharSet) { m_defaultCharSet = newDefaultCharSet; }
void LevelOnePage::setDefaultNOS(int defaultNOS)
{
m_defaultNOS = defaultNOS;
}
void LevelOnePage::setSecondCharSet(int newSecondCharSet)
{
m_secondCharSet = newSecondCharSet;
if (m_secondCharSet == 0xf)
m_secondNOS = 0x7;
}
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::setDefaultScreenColour(int newDefaultScreenColour) { m_defaultScreenColour = newDefaultScreenColour; }
void LevelOnePage::setDefaultRowColour(int newDefaultRowColour) { m_defaultRowColour = newDefaultRowColour; }
void LevelOnePage::setColourTableRemap(int newColourTableRemap) { m_colourTableRemap = newColourTableRemap; }
void LevelOnePage::setBlackBackgroundSubst(bool newBlackBackgroundSubst) { m_blackBackgroundSubst = newBlackBackgroundSubst; }
int LevelOnePage::CLUT(int index, int renderLevel) const
{
if (renderLevel == 2)
return index>=16 ? m_CLUT[index] : m_defaultCLUT[index];
else
return renderLevel==3 ? m_CLUT[index] : m_defaultCLUT[index];
}
void LevelOnePage::setCLUT(int index, int newColour)
{
if (index == 8)
return;
m_CLUT[index] = newColour;
}
QColor LevelOnePage::CLUTtoQColor(int index, int renderLevel) const
{
int colour12Bit = CLUT(index, renderLevel);
if (index == 8)
return QColor(Qt::transparent);
return QColor(((colour12Bit & 0xf00) >> 8) * 17, ((colour12Bit & 0x0f0) >> 4) * 17, (colour12Bit & 0x00f) * 17);
}
bool LevelOnePage::isPaletteDefault(int colour) const
{
return m_CLUT[colour] == m_defaultCLUT[colour];
}
bool LevelOnePage::isPaletteDefault(int fromColour, int toColour) const
{
for (int i=fromColour; i<=toColour; i++)
if (m_CLUT[i] != m_defaultCLUT[i])
return false;
return true;
}
int LevelOnePage::levelRequired() const
{
// X/28/4 present i.e. CLUTs 0 or 1 redefined - Level 3.5
if (!isPaletteDefault(0, 15))
return 3;
// TODO Check for X/28/1 for DCLUT for mode 1-3 DRCS characters - return 3
// Assume Level 2.5 if any X/28 page enhancements are present, otherwise assume Level 1
int levelSeen = (!isPaletteDefault(16, 31) || m_leftSidePanelDisplayed || m_rightSidePanelDisplayed || m_defaultScreenColour !=0 || m_defaultRowColour !=0 || m_blackBackgroundSubst || m_colourTableRemap !=0 || m_defaultCharSet != 0 || m_secondCharSet != 0xf) ? 2 : 0;
// If there's no X/26 triplets, exit here as Level 1 or 2.5
if (m_enhancements.isEmpty())
return levelSeen;
for (int i=0; i<m_enhancements.size(); i++) {
// Font style - Level 3.5 only triplet
if (m_enhancements.at(i).modeExt() == 0x2e) // Font style
return 3;
if (levelSeen == 0)
// Check for Level 1.5 triplets
switch (m_enhancements.at(i).modeExt()) {
case 0x04: // Set Active Position
case 0x07: // Address Row 0
case 0x1f: // Termination
case 0x22: // G3 character @ Level 1.5
case 0x2f: // G2 character
levelSeen = 1;
break;
default:
if (m_enhancements.at(i).modeExt() >= 0x30 && m_enhancements.at(i).modeExt() <= 0x3f)
// G0 character with diacritical
levelSeen = 1;
}
if (levelSeen < 2)
switch (m_enhancements.at(i).modeExt()) {
// Check for Level 2.5 triplets
case 0x00: // Full screen colour
case 0x01: // Full row colour
case 0x10: // Origin Modifier
case 0x11: // Invoke Active Object
case 0x12: // Invoke Adaptive Object
case 0x13: // Invoke Passive Object
case 0x15: // Define Active Object
case 0x16: // Define Adaptive Object
case 0x17: // Define Passive Object
case 0x18: // DRCS Mode
case 0x20: // Foreground colour
case 0x21: // G1 character
case 0x23: // Background colour
case 0x27: // Flash functions
case 0x28: // G0 and G2 charset designation
case 0x29: // G0 character @ Level 2.5
case 0x2b: // G3 character @ Level 2.5
case 0x2c: // Display attributes
case 0x2d: // DRCS character
levelSeen = 2;
break;
}
if (levelSeen == 2)
switch (m_enhancements.at(i).modeExt()) {
// Check for triplets with "required at Level 3.5 only" parameters
case 0x15: // Define Active Object
case 0x16: // Define Adaptive Object
case 0x17: // Define Passive Object
if ((m_enhancements.at(i).address() & 0x18) == 0x10)
return 3;
break;
case 0x18: // DRCS Mode
if ((m_enhancements.at(i).data() & 0x30) == 0x20)
return 3;
break;
}
}
return levelSeen;
}
void LevelOnePage::setLeftSidePanelDisplayed(bool newLeftSidePanelDisplayed) { m_leftSidePanelDisplayed = newLeftSidePanelDisplayed; }
void LevelOnePage::setRightSidePanelDisplayed(bool newRightSidePanelDisplayed) { m_rightSidePanelDisplayed = newRightSidePanelDisplayed; }
void LevelOnePage::setSidePanelColumns(int newSidePanelColumns) { m_sidePanelColumns = newSidePanelColumns; }
void LevelOnePage::setSidePanelStatusL25(bool newSidePanelStatusL25) { m_sidePanelStatusL25 = newSidePanelStatusL25; }
void LevelOnePage::setFastTextLinkPageNumber(int linkNumber, int pageNumber)
{
m_fastTextLink[linkNumber].pageNumber = pageNumber;
}
void LevelOnePage::setComposeLinkFunction(int linkNumber, int newFunction)
{
m_composeLink[linkNumber].function = newFunction;
}
void LevelOnePage::setComposeLinkLevel2p5(int linkNumber, bool newRequired)
{
m_composeLink[linkNumber].level2p5 = newRequired;
}
void LevelOnePage::setComposeLinkLevel3p5(int linkNumber, bool newRequired)
{
m_composeLink[linkNumber].level3p5 = newRequired;
}
void LevelOnePage::setComposeLinkPageNumber(int linkNumber, int newPageNumber)
{
m_composeLink[linkNumber].pageNumber = newPageNumber;
}
void LevelOnePage::setComposeLinkSubPageCodes(int linkNumber, int newSubPageCodes)
{
m_composeLink[linkNumber].subPageCodes = newSubPageCodes;
}