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QTeletextMaker/decode.cpp

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Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
/*
* Copyright (C) 2020-2022 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 <QMultiMap>
//#include <QTime>
#include <QPair>
#include <algorithm>
#include <vector>
#include "decode.h"
TeletextPageDecode::TeletextPageDecode()
{
Rename Level method and variable
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m_level = 0;
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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for (int r=0; r<25; r++)
for (int c=0; c<72; c++)
Force refresh in decoder constructor Fixes broken initial rendering of pages with side panels.
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m_refresh[r][c] = true;
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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m_finalFullScreenColour = 0;
m_finalFullScreenQColor.setRgb(0, 0, 0);
for (int r=0; r<25; r++) {
m_fullRowColour[r] = 0;
m_fullRowQColor[r].setRgb(0, 0, 0);
}
m_leftSidePanelColumns = m_rightSidePanelColumns = 0;
m_textLayer.push_back(&m_level1Layer);
m_textLayer.push_back(new EnhanceLayer);
}
TeletextPageDecode::~TeletextPageDecode()
{
while (m_textLayer.size()>1) {
delete m_textLayer.back();
m_textLayer.pop_back();
}
}
void TeletextPageDecode::setRefresh(int r, int c, bool refresh)
{
m_refresh[r][c] = refresh;
}
void TeletextPageDecode::setTeletextPage(LevelOnePage *newCurrentPage)
{
m_levelOnePage = newCurrentPage;
m_level1Layer.setTeletextPage(newCurrentPage);
updateSidePanels();
}
Rename Level method and variable
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void TeletextPageDecode::setLevel(int level)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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{
Rename Level method and variable
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if (level == m_level)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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return;
Rename Level method and variable
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m_level = level;
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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decodePage();
}
void TeletextPageDecode::updateSidePanels()
{
int oldLeftSidePanelColumns = m_leftSidePanelColumns;
int oldRightSidePanelColumns = m_rightSidePanelColumns;
Rename Level method and variable
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if (m_level >= (3-m_levelOnePage->sidePanelStatusL25()) && m_levelOnePage->leftSidePanelDisplayed())
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
m_leftSidePanelColumns = (m_levelOnePage->sidePanelColumns() == 0) ? 16 : m_levelOnePage->sidePanelColumns();
else
m_leftSidePanelColumns = 0;
Rename Level method and variable
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if (m_level >= (3-m_levelOnePage->sidePanelStatusL25()) && m_levelOnePage->rightSidePanelDisplayed())
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
m_rightSidePanelColumns = 16-m_levelOnePage->sidePanelColumns();
else
m_rightSidePanelColumns = 0;
if (m_leftSidePanelColumns != oldLeftSidePanelColumns || m_rightSidePanelColumns != oldRightSidePanelColumns) {
emit sidePanelsChanged();
decodePage();
}
}
void TeletextPageDecode::buildEnhanceMap(TextLayer *enhanceLayer, int tripletNumber)
{
bool terminatorFound=false;
ActivePosition activePosition;
const X26Triplet *x26Triplet;
int originModifierR=0;
int originModifierC=0;
do {
x26Triplet = &m_levelOnePage->enhancements()->at(tripletNumber);
if (x26Triplet->isRowTriplet())
// Row address group
switch (x26Triplet->mode()) {
case 0x00: // Full screen colour
Rename Level method and variable
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if (m_level >= 2 && ((x26Triplet->data() & 0x60) == 0x00) && !activePosition.isDeployed())
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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enhanceLayer->setFullScreenColour(x26Triplet->data());
break;
case 0x01: // Full row colour
Rename Level method and variable
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if (m_level >= 2 && activePosition.setRow(x26Triplet->addressRow()) && ((x26Triplet->data() & 0x60) == 0x00 || (x26Triplet->data() & 0x60) == 0x60))
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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enhanceLayer->setFullRowColour(activePosition.row(), x26Triplet->data() & 0x1f, (x26Triplet->data() & 0x60) == 0x60);
break;
case 0x04: // Set active position
Rename Level method and variable
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if (activePosition.setRow(x26Triplet->addressRow()) && m_level >= 2 && x26Triplet->data() < 40)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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activePosition.setColumn(x26Triplet->data());
break;
case 0x07: // Address row 0
if (x26Triplet->address() == 0x3f && !activePosition.isDeployed()) {
activePosition.setRow(0);
activePosition.setColumn(8);
Rename Level method and variable
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if (m_level >= 2 && ((x26Triplet->data() & 0x60) == 0x00 || (x26Triplet->data() & 0x60) == 0x60))
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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enhanceLayer->setFullRowColour(0, x26Triplet->data() & 0x1f, (x26Triplet->data() & 0x60) == 0x60);
}
break;
case 0x10: // Origin modifier
Rename Level method and variable
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if (m_level >= 2 && (tripletNumber+1) < m_levelOnePage->enhancements()->size() && m_levelOnePage->enhancements()->at(tripletNumber+1).mode() >= 0x11 && m_levelOnePage->enhancements()->at(tripletNumber+1).mode() <= 0x13 && x26Triplet->address() >= 40 && x26Triplet->data() < 72) {
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
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originModifierR = x26Triplet->address()-40;
originModifierC = x26Triplet->data();
}
break;
case 0x11 ... 0x13: // Invoke Object
Rename Level method and variable
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if (m_level >= 2) {
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
if ((x26Triplet->address() & 0x18) == 0x08) {
// Local Object
// Check if the pointer in the Invocation triplet is valid
// Can't point to triplets 13-15; only triplets 0-12 per packet
if ((x26Triplet->data() & 0x0f) > 12)
break;
int tripletPointer = ((x26Triplet->data() >> 4) | ((x26Triplet->address() & 1) << 3)) * 13 + (x26Triplet->data() & 0x0f);
// Can't point to triplet beyond the end of the Local Enhancement Data
if ((tripletPointer+1) >= m_levelOnePage->enhancements()->size())
break;
// Check if we're pointing to an actual Object Definition of the same type
if ((x26Triplet->mode() | 0x04) != m_levelOnePage->enhancements()->at(tripletPointer).mode())
break;
// The Object Definition can't declare it's at triplet 13-15; only triplets 0-12 per packet
if ((m_levelOnePage->enhancements()->at(tripletPointer).data() & 0x0f) > 12)
break;
// Check if the Object Definition triplet is where it declares it is
if ((((m_levelOnePage->enhancements()->at(tripletPointer).data() >> 4) | ((m_levelOnePage->enhancements()->at(tripletPointer).address() & 1) << 3)) * 13 + (m_levelOnePage->enhancements()->at(tripletPointer).data() & 0x0f)) != tripletPointer)
break;
// Check if (sub)Object type can be invoked by Object type we're within
if (enhanceLayer->objectType() >= (x26Triplet->mode() & 0x03))
break;
// Is the object required at the current presentation Level?
Rename Level method and variable
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if (m_level == 2 && (m_levelOnePage->enhancements()->at(tripletPointer).address() & 0x08) == 0x00)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
break;
Rename Level method and variable
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if (m_level == 3 && (m_levelOnePage->enhancements()->at(tripletPointer).address() & 0x10) == 0x00)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
break;
EnhanceLayer *newLayer = new EnhanceLayer;
m_textLayer.push_back(newLayer);
newLayer->setObjectType(x26Triplet->mode() & 0x03);
newLayer->setOrigin(enhanceLayer->originR() + activePosition.row() + originModifierR, enhanceLayer->originC() + activePosition.column() + originModifierC);
buildEnhanceMap(newLayer, tripletPointer+1);
} else
qDebug("POP or GPOP");
originModifierR = originModifierC = 0;
}
break;
case 0x15 ... 0x17: // Define Object, also used as terminator
terminatorFound = true;
break;
case 0x1f: // Terminator
if (x26Triplet->address() == 63)
terminatorFound = true;
break;
}
else {
// Column address group
bool columnTripletActioned = true;
switch (x26Triplet->mode()) {
// First we deal with column triplets that are also valid at Level 1.5
case 0x0b: // G3 mosaic character at Level 2.5
Rename Level method and variable
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if (m_level <= 1)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
break;
// fall-through
case 0x02: // G3 mosaic character at Level 1.5
case 0x0f: // G2 character
case 0x10 ... 0x1f: // Diacritical mark
if (activePosition.setColumn(x26Triplet->addressColumn()) && x26Triplet->data() >= 0x20)
enhanceLayer->enhanceMap.insert(qMakePair(activePosition.row(), activePosition.column()), qMakePair(x26Triplet->mode() | 0x20, x26Triplet->data()));
break;
// Make sure that PDC and reserved triplets don't affect the Active Position
case 0x04 ... 0x06: // 0x04 and 0x05 are reserved, 0x06 for PDC
case 0x0a: // Reserved
break;
default:
columnTripletActioned = false;
}
// All remaining possible column triplets at Level 2.5 affect the Active Position
Rename Level method and variable
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if (m_level >= 2 && !columnTripletActioned && activePosition.setColumn(x26Triplet->addressColumn()))
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
enhanceLayer->enhanceMap.insert(qMakePair(activePosition.row(), activePosition.column()), qMakePair(x26Triplet->mode() | 0x20, x26Triplet->data()));
}
tripletNumber++;
} while (!terminatorFound && tripletNumber < m_levelOnePage->enhancements()->size());
}
void TeletextPageDecode::decodePage()
{
int currentFullRowColour, downwardsFullRowColour;
int renderedFullScreenColour;
struct {
bool operator() (TextLayer *i, TextLayer *j) { return (i->objectType() < j->objectType()); }
} compareLayer;
// QTime renderPageTime;
// renderPageTime.start();
updateSidePanels();
while (m_textLayer.size()>2) {
delete m_textLayer.back();
m_textLayer.pop_back();
}
Rename Level method and variable
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renderedFullScreenColour = (m_level >= 2) ? m_levelOnePage->defaultScreenColour() : 0;
downwardsFullRowColour = (m_level >= 2) ? m_levelOnePage->defaultRowColour() : 0;
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
setFullScreenColour(renderedFullScreenColour);
for (int r=0; r<25; r++)
setFullRowColour(r, downwardsFullRowColour);
m_textLayer[1]->enhanceMap.clear();
Rename Level method and variable
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if (m_level > 0 && !m_levelOnePage->enhancements()->isEmpty()) {
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
m_textLayer[1]->setFullScreenColour(-1);
for (int r=0; r<25; r++)
m_textLayer[1]->setFullRowColour(r, -1, false);
buildEnhanceMap(m_textLayer[1]);
if (m_textLayer.size() > 2)
std::stable_sort(m_textLayer.begin()+2, m_textLayer.end(), compareLayer);
Rename Level method and variable
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if (m_level >= 2) {
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
if (m_textLayer[1]->fullScreenColour() != -1)
downwardsFullRowColour = m_textLayer[1]->fullScreenColour();
for (int r=0; r<25; r++) {
for (int l=0; l<2; l++) {
if (r == 0 && m_textLayer[l]->fullScreenColour() != - 1)
renderedFullScreenColour = m_textLayer[l]->fullScreenColour();
if (m_textLayer[l]->fullRowColour(r) == - 1)
currentFullRowColour = downwardsFullRowColour;
else {
currentFullRowColour = m_textLayer[l]->fullRowColour(r);
if (m_textLayer[l]->fullRowDownwards(r))
downwardsFullRowColour = currentFullRowColour;
}
}
setFullRowColour(r ,currentFullRowColour);
}
setFullScreenColour(renderedFullScreenColour);
}
}
for (int r=0; r<25; r++)
decodeRow(r);
// qDebug("Full page render: %d ms", renderPageTime.elapsed());
}
void TeletextPageDecode::decodeRow(int r)
{
int c;
int phaseNumberRender = 0;
bool decodeNextRow = false;
bool applyRightHalf = false;
bool previouslyDoubleHeight, previouslyBottomHalf, underlined;
bool doubleHeightFound = false;
textCharacter resultCharacter, layerCharacter;
applyAttributes layerApplyAttributes;
textAttributes underlyingAttributes, resultAttributes;
int level1CharSet;
for (c=0; c<72; c++) {
textCell oldTextCell = m_cell[r][c];
resultAttributes = underlyingAttributes;
for (int l=0; l<m_textLayer.size(); l++) {
layerCharacter = m_textLayer[l]->character(r, c);
if (layerCharacter.code != 0x00)
resultCharacter = layerCharacter;
if (l == 0) {
// m_cell[r][c].level1Mosaic = (resultCharacter.set == 24 || resultCharacter.set == 25) && m_levelOnePage->character(r, c) >= 0x20;
m_cell[r][c].level1Mosaic = (resultCharacter.set == 24 || resultCharacter.set == 25);
if (!m_cell[r][c].level1Mosaic)
level1CharSet = resultCharacter.set;
m_cell[r][c].level1CharSet = level1CharSet;
}
layerApplyAttributes = { false, false, false, false, false, false, false, false };
m_textLayer[l]->attributes(r, c, &layerApplyAttributes);
if (layerApplyAttributes.copyAboveAttributes) {
resultAttributes = m_cell[r-1][c].attribute;
layerApplyAttributes.copyAboveAttributes = false;
break;
}
if (layerApplyAttributes.applyForeColour) {
resultAttributes.foreColour = layerApplyAttributes.attribute.foreColour;
Rename Level method and variable
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if (l == 0 && m_level >= 2)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
resultAttributes.foreColour |= m_foregroundRemap[m_levelOnePage->colourTableRemap()];
}
if (layerApplyAttributes.applyBackColour) {
resultAttributes.backColour = layerApplyAttributes.attribute.backColour;
if (l == 0) {
Rename Level method and variable
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if (m_level >= 2)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
if (resultAttributes.backColour == 0x20)
resultAttributes.backColour = (c > 39 || m_levelOnePage->blackBackgroundSubst()) ? m_fullRowColour[r] : m_backgroundRemap[m_levelOnePage->colourTableRemap()];
else
resultAttributes.backColour |= m_backgroundRemap[m_levelOnePage->colourTableRemap()];
else
if (resultAttributes.backColour == 0x20)
resultAttributes.backColour = 0x00;
}
}
if (layerApplyAttributes.applyFlash) {
//BUG Adaptive Objects disrupt inc/dec flash
resultAttributes.flash = layerApplyAttributes.attribute.flash;
if (resultAttributes.flash.mode != 0)
phaseNumberRender = (resultAttributes.flash.ratePhase == 4 || resultAttributes.flash.ratePhase == 5) ? 1 : resultAttributes.flash.ratePhase;
}
if (layerApplyAttributes.applyDisplayAttributes)
resultAttributes.display = layerApplyAttributes.attribute.display;
else {
// Selecting contiguous mosaics wih a triplet will override an earlier Level 1 separated mosaics attribute until a further Level 1 contiguous mosaic attribute is encountered
resultAttributes.display.forceContiguous = (layerApplyAttributes.applyContiguousOnly) ? false : underlyingAttributes.display.forceContiguous;
if (layerApplyAttributes.applyTextSizeOnly) {
resultAttributes.display.doubleHeight = layerApplyAttributes.attribute.display.doubleHeight;
resultAttributes.display.doubleWidth = layerApplyAttributes.attribute.display.doubleWidth;
}
if (layerApplyAttributes.applyBoxingOnly)
resultAttributes.display.boxingWindow = layerApplyAttributes.attribute.display.boxingWindow;
if (layerApplyAttributes.applyConcealOnly || layerApplyAttributes.applyForeColour)
resultAttributes.display.conceal = layerApplyAttributes.attribute.display.conceal;
}
if (m_textLayer[l]->objectType() <= 1)
underlyingAttributes = resultAttributes;
Rename Level method and variable
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if (m_level == 0)
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
break;
}
underlined = false;
if (resultAttributes.display.underlineSeparated) {
if (resultCharacter.set == 24)
resultCharacter.set = 25;
else
underlined = resultCharacter.set < 24;
}
if (resultAttributes.display.forceContiguous && resultCharacter.set == 25)
resultCharacter.set = 24;
resultAttributes.flash.phaseNumber = phaseNumberRender;
previouslyDoubleHeight = m_cell[r][c].attribute.display.doubleHeight;
previouslyBottomHalf = m_cell[r][c].bottomHalf;
m_cell[r][c].character = resultCharacter;
m_cell[r][c].attribute = resultAttributes;
if (m_cell[r][c] != oldTextCell) {
m_refresh[r][c] = true;
if (static_cast<Level1Layer *>(m_textLayer[0])->rowHeight(r) == Level1Layer::TopHalf) {
m_refresh[r+1][c] = true;
decodeNextRow = true;
}
if ((m_cell[r][c].attribute.display.doubleHeight || oldTextCell.attribute.display.doubleHeight) && r < 25)
m_refresh[r+1][c] = true;
if ((m_cell[r][c].attribute.display.doubleWidth || oldTextCell.attribute.display.doubleWidth) && c < 72)
m_refresh[r][c+1] = true;
if (((m_cell[r][c].attribute.display.doubleHeight && m_cell[r][c].attribute.display.doubleWidth) || (oldTextCell.attribute.display.doubleHeight && oldTextCell.attribute.display.doubleWidth)) && r < 25 && c < 72)
m_refresh[r+1][c+1] = true;
}
if (resultAttributes.flash.ratePhase == 4 && ++phaseNumberRender == 4)
phaseNumberRender = 1;
if (resultAttributes.flash.ratePhase == 5 && --phaseNumberRender == 0)
phaseNumberRender = 3;
if (r > 0)
m_cell[r][c].bottomHalf = m_cell[r-1][c].attribute.display.doubleHeight && !m_cell[r-1][c].bottomHalf;
if ((resultAttributes.display.doubleHeight != previouslyDoubleHeight) || (m_cell[r][c].bottomHalf != previouslyBottomHalf))
decodeNextRow = true;
m_cell[r][c].rightHalf = applyRightHalf;
if (resultAttributes.display.doubleHeight)
doubleHeightFound = true;
if (resultAttributes.display.doubleWidth || (m_cell[r][c].bottomHalf && c > 0 && m_cell[r-1][c-1].rightHalf))
applyRightHalf ^= true;
else
applyRightHalf = false;
}
if (decodeNextRow && r<24)
decodeRow(r+1);
}
textCell& TeletextPageDecode::cellAtCharacterOrigin(int r, int c)
{
/* if (m_cell[r][c].bottomHalf && r > 0) {
if (m_cell[r][c].rightHalf && c > 0)
// Double size
return m_cell[r-1][c-1];
else
// Double height
return m_cell[r-1][c];
} else {
if (m_cell[r][c].rightHalf && c > 0)
// Double width
return m_cell[r][c-1];
else
// Normal size
return m_cell[r][c];
}*/
switch (cellCharacterFragment(r, c)) {
case TeletextPageDecode::DoubleHeightBottomHalf:
case TeletextPageDecode::DoubleSizeBottomLeftQuarter:
return m_cell[r-1][c];
case TeletextPageDecode::DoubleWidthRightHalf:
case TeletextPageDecode::DoubleSizeTopRightQuarter:
return m_cell[r][c-1];
case TeletextPageDecode::DoubleSizeBottomRightQuarter:
return m_cell[r-1][c-1];
default:
return m_cell[r][c];
}
}
QColor TeletextPageDecode::cellQColor(int r, int c, ColourPart colourPart)
{
const textCell& cell = cellAtCharacterOrigin(r, c);
const bool newsFlashOrSubtitle = m_levelOnePage->controlBit(PageBase::C5Newsflash) || m_levelOnePage->controlBit(PageBase::C6Subtitle);
int resultCLUT;
switch (colourPart) {
case Foreground:
if (!cell.attribute.display.invert)
resultCLUT = cell.attribute.foreColour;
else
resultCLUT = cell.attribute.backColour;
break;
case Background:
if (!cell.attribute.display.invert)
resultCLUT = cell.attribute.backColour;
else
resultCLUT = cell.attribute.foreColour;
break;
case FlashForeground:
if (!cell.attribute.display.invert)
resultCLUT = cell.attribute.foreColour ^ 8;
else
resultCLUT = cell.attribute.backColour ^ 8;
break;
}
if (resultCLUT == 8) {
// Transparent CLUT - either Full Row Colour or Video
// Logic of table C.1 in spec implemented to find out which it is
if (cell.attribute.display.boxingWindow != newsFlashOrSubtitle)
return QColor(Qt::transparent);
int rowColour;
if (cellCharacterFragment(r, c) == TeletextPageDecode::DoubleHeightBottomHalf ||
cellCharacterFragment(r, c) == TeletextPageDecode::DoubleSizeBottomLeftQuarter ||
cellCharacterFragment(r, c) == TeletextPageDecode::DoubleSizeBottomRightQuarter)
rowColour = m_fullRowColour[r-1];
else
rowColour = m_fullRowColour[r];
if (rowColour == 8)
return QColor(Qt::transparent);
else
Rename Level method and variable
2022-05-02 22:24:04 +01:00
return m_levelOnePage->CLUTtoQColor(rowColour, m_level);
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
} else if (!cell.attribute.display.boxingWindow && newsFlashOrSubtitle)
return QColor(Qt::transparent);
Rename Level method and variable
2022-05-02 22:24:04 +01:00
return m_levelOnePage->CLUTtoQColor(resultCLUT, m_level);
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
}
QColor TeletextPageDecode::cellForegroundQColor(int r, int c)
{
return cellQColor(r, c, Foreground);
}
QColor TeletextPageDecode::cellBackgroundQColor(int r, int c)
{
return cellQColor(r, c, Background);
}
QColor TeletextPageDecode::cellFlashForegroundQColor(int r, int c)
{
return cellQColor(r, c, FlashForeground);
}
TeletextPageDecode::CharacterFragment TeletextPageDecode::cellCharacterFragment(int r, int c) const
{
if (m_cell[r][c].bottomHalf && r > 0) {
if (m_cell[r][c].rightHalf && c > 0)
return CharacterFragment::DoubleSizeBottomRightQuarter;
else if (m_cell[r-1][c].attribute.display.doubleWidth)
return CharacterFragment::DoubleSizeBottomLeftQuarter;
else
return CharacterFragment::DoubleHeightBottomHalf;
} else if (m_cell[r][c].rightHalf && c > 0) {
if (m_cell[r][c-1].attribute.display.doubleHeight)
return CharacterFragment::DoubleSizeTopRightQuarter;
else
return CharacterFragment::DoubleWidthRightHalf;
}
if (m_cell[r][c].attribute.display.doubleHeight) {
if (m_cell[r][c].attribute.display.doubleWidth)
return CharacterFragment::DoubleSizeTopLeftQuarter;
else
return CharacterFragment::DoubleHeightTopHalf;
} else if (m_cell[r][c].attribute.display.doubleWidth)
return CharacterFragment::DoubleWidthLeftHalf;
return CharacterFragment::NormalSize;
}
inline void TeletextPageDecode::setFullScreenColour(int newColour)
{
if (newColour == 8 || m_levelOnePage->controlBit(PageBase::C5Newsflash) || m_levelOnePage->controlBit(PageBase::C6Subtitle)) {
m_finalFullScreenQColor = QColor(0, 0, 0, 0);
emit fullScreenColourChanged(QColor(0, 0, 0, 0));
return;
}
Rename Level method and variable
2022-05-02 22:24:04 +01:00
QColor newFullScreenQColor = m_levelOnePage->CLUTtoQColor(newColour, m_level);
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
m_finalFullScreenColour = newColour;
if (m_finalFullScreenQColor != newFullScreenQColor) {
m_finalFullScreenQColor = newFullScreenQColor;
emit fullScreenColourChanged(m_finalFullScreenQColor);
}
}
inline void TeletextPageDecode::setFullRowColour(int row, int newColour)
{
m_fullRowColour[row] = newColour;
if (newColour == 8 || m_levelOnePage->controlBit(PageBase::C5Newsflash) || m_levelOnePage->controlBit(PageBase::C6Subtitle)) {
m_fullRowQColor[row] = QColor(0, 0, 0, 0);
emit fullRowColourChanged(row, QColor(0, 0, 0, 0));
return;
}
Rename Level method and variable
2022-05-02 22:24:04 +01:00
QColor newFullRowQColor = m_levelOnePage->CLUTtoQColor(newColour, m_level);
Split decoder and render decode.* will solely decode the teletext packets into a grid of characters and colours and other attributes stored in an agnostic way, then render.* will read this grid and render the characters onto the screen with the Qt specific methods.
2022-04-02 22:38:38 +01:00
if (m_fullRowQColor[row] != newFullRowQColor) {
for (int c=0; c<72; c++) {
if (m_cell[row][c].attribute.foreColour == 8 || m_cell[row][c].attribute.backColour == 8)
setRefresh(row, c, true);
}
m_fullRowQColor[row] = newFullRowQColor;
emit fullRowColourChanged(row, m_fullRowQColor[row]);
}
}
void TextLayer::setTeletextPage(LevelOnePage *newCurrentPage) { m_levelOnePage = newCurrentPage; }
void TextLayer::setFullScreenColour(int newColour) { m_layerFullScreenColour = newColour; }
void TextLayer::setFullRowColour(int r, int newColour, bool newDownwards)
{
m_layerFullRowColour[r] = newColour;
m_layerFullRowDownwards[r] = newDownwards;
}
void EnhanceLayer::setObjectType(int newObjectType) { m_objectType = newObjectType; }
void EnhanceLayer::setOrigin(int r, int c)
{
m_originR = r;
m_originC = c;
}
Level1Layer::Level1Layer()
{
for (int r=0; r<25; r++) {
m_rowHasDoubleHeightAttr[r] = false;
m_rowHeight[r] = Normal;
}
}
EnhanceLayer::EnhanceLayer()
{
for (int r=0; r<25; r++) {
m_layerFullRowColour[r] = -1;
m_layerFullRowDownwards[r] = false;
}
}
textCharacter EnhanceLayer::character(int r, int c)
{
r -= m_originR;
c -= m_originC;
if (r < 0 || c < 0)
return { 0, 0 };
// QPair.first is triplet mode, QPair.second is triplet data
QList<QPair<int, int>> enhancements = enhanceMap.values(qMakePair(r, c));
if (enhancements.size() > 0)
for (int i=0; i<enhancements.size(); i++)
switch (enhancements.at(i).first) {
case 0x2b: // G3 mosaic character at Level 2.5
case 0x22: // G3 mosaic character at Level 1.5
return { enhancements.at(i).second, 26 };
case 0x29: // G0 character at Level 2.5
return { enhancements.at(i).second, 0 };
case 0x2f: // G2 character
return { enhancements.at(i).second, 7 };
case 0x30 ... 0x3f: // Diacritical
// Deal with @ symbol replacing * symbol - clause 15.6.1 note 3 in spec
if (enhancements.at(i).first == 0x30 && enhancements.at(i).second == 0x2a)
return { 0x40, 0 };
else
return { enhancements.at(i).second, 0, enhancements.at(i).first & 0x0f };
case 0x21: // G1 character
if ((enhancements.at(i).second) >= 0x20)
return { enhancements.at(i).second, (enhancements.at(i).second & 0x20) ? 24 : 0 };
}
return { 0, 0 };
}
void EnhanceLayer::attributes(int r, int c, applyAttributes *layerApplyAttributes)
{
r -= m_originR;
c -= m_originC;
if (r < 0 || c < 0)
return;
if (m_objectType == 2) {
// Adaptive Object - find rightmost column addressed on this row if we haven't already
if (r != m_rowCached) {
m_rightMostColumn[r] = 0;
m_rowCached = r;
for (int cc=39; cc>0; cc--)
if (enhanceMap.contains(qMakePair(r, cc))) {
m_rightMostColumn[r] = cc;
break;
}
}
// On new row, default to attributes already on page
// At end of rightmost column, let go of all attributes
if (c == 0 || c == m_rightMostColumn[r]+1)
m_applyAttributes = { false, false, false, false, false, false, false, false };
else {
// Re-apply attributes that Object has defined previously on this row
if (m_applyAttributes.applyForeColour) {
layerApplyAttributes->applyForeColour = true;
layerApplyAttributes->attribute.foreColour = m_applyAttributes.attribute.foreColour;
}
if (m_applyAttributes.applyBackColour) {
layerApplyAttributes->applyBackColour = true;
layerApplyAttributes->attribute.backColour = m_applyAttributes.attribute.backColour;
}
//BUG Adaptive Objects disrupt inc/dec flash
if (m_applyAttributes.applyFlash) {
layerApplyAttributes->applyFlash = true;
layerApplyAttributes->attribute.flash.mode = m_applyAttributes.attribute.flash.mode;
layerApplyAttributes->attribute.flash.ratePhase = m_applyAttributes.attribute.flash.ratePhase;
}
if (m_applyAttributes.applyDisplayAttributes) {
layerApplyAttributes->applyDisplayAttributes = true;
layerApplyAttributes->attribute.display = m_applyAttributes.attribute.display;
}
}
}
if (m_objectType == 3) {
if (r == 0 && c == 0) {
// Passive Objects always start with all these default attributes
m_applyAttributes.applyForeColour = true;
m_applyAttributes.attribute.foreColour = 0x07;
m_applyAttributes.applyBackColour = true;
m_applyAttributes.attribute.backColour = 0x00;
m_applyAttributes.applyDisplayAttributes = true;
m_applyAttributes.applyFlash = true;
m_applyAttributes.attribute.flash.mode = 0;
m_applyAttributes.attribute.flash.ratePhase = 0;
m_applyAttributes.attribute.display.doubleHeight = false;
m_applyAttributes.attribute.display.doubleWidth = false;
m_applyAttributes.attribute.display.boxingWindow = false;
m_applyAttributes.attribute.display.conceal = false;
m_applyAttributes.attribute.display.invert = false;
m_applyAttributes.attribute.display.underlineSeparated = false;
m_applyAttributes.attribute.display.forceContiguous = false;
}
if (character(r+m_originR, c+m_originC).code == 0x00)
// Passive Object attributes only apply where it also defines a character
// In this case, wrench the pointer-parameter to alter only the attributes of the Object
layerApplyAttributes = &m_applyAttributes;
else
*layerApplyAttributes = m_applyAttributes;
}
// QPair.first is triplet mode, QPair.second is triplet data
QList<QPair<int, int>> enhancements = enhanceMap.values(qMakePair(r, c));
for (int i=0; i<enhancements.size(); i++)
switch (enhancements.at(i).first) {
case 0x20: // Foreground colour
if ((enhancements.at(i).second & 0x60) == 0) {
layerApplyAttributes->applyForeColour = true;
layerApplyAttributes->attribute.foreColour = enhancements.at(i).second;
}
break;
case 0x23: // Background colour
if ((enhancements.at(i).second & 0x60) == 0) {
layerApplyAttributes->applyBackColour = true;
layerApplyAttributes->attribute.backColour = enhancements.at(i).second;
}
break;
case 0x27: // Additional flash functions
if ((enhancements.at(i).second & 0x60) == 0 && (enhancements.at(i).second & 0x18) != 0x18) { // Avoid reserved rate/phase
layerApplyAttributes->applyFlash = true;
layerApplyAttributes->attribute.flash.mode = enhancements.at(i).second & 0x03;
layerApplyAttributes->attribute.flash.ratePhase = (enhancements.at(i).second >> 2) & 0x07;
}
break;
case 0x2c: // Display attributes
layerApplyAttributes->applyDisplayAttributes = true;
layerApplyAttributes->attribute.display.doubleHeight = enhancements.at(i).second & 0x01;
layerApplyAttributes->attribute.display.boxingWindow = enhancements.at(i).second & 0x02;
layerApplyAttributes->attribute.display.conceal = enhancements.at(i).second & 0x04;
layerApplyAttributes->attribute.display.invert = enhancements.at(i).second & 0x10;
layerApplyAttributes->attribute.display.underlineSeparated = enhancements.at(i).second & 0x20;
// Selecting contiguous mosaics wih a triplet will override an earlier Level 1 separated mosaics attribute
layerApplyAttributes->attribute.display.forceContiguous = !layerApplyAttributes->attribute.display.underlineSeparated;
layerApplyAttributes->attribute.display.doubleWidth = enhancements.at(i).second & 0x40;
break;
}
if (m_objectType >= 2)
m_applyAttributes = *layerApplyAttributes;
}
void Level1Layer::updateRowCache(int r)
{
level1CacheAttributes buildCacheAttributes;
bool doubleHeightAttrFound = false;
for (int c=0; c<40; c++) {
unsigned char charCode = m_levelOnePage->character(r, c);
// Set at spacing attributes
switch (charCode) {
case 0x0c: // Normal size
if (buildCacheAttributes.sizeCode != 0x0c) // Size CHANGE resets held mosaic to space
buildCacheAttributes.holdChar = 0x20;
buildCacheAttributes.sizeCode = 0x0c;
break;
case 0x19: // Contiguous mosaics
buildCacheAttributes.separated = false;
break;
case 0x1a: // Separated mosaics
buildCacheAttributes.separated = true;
break;
case 0x1c: // Black background
buildCacheAttributes.backColour = 0x00;
break;
case 0x1d: // New background
buildCacheAttributes.backColour = buildCacheAttributes.foreColour & 0x07;
break;
case 0x1e: // Hold mosaics
buildCacheAttributes.held = true;
break;
}
if (buildCacheAttributes.mosaics && (charCode & 0x20)) {
buildCacheAttributes.holdChar = charCode;
buildCacheAttributes.holdSeparated = buildCacheAttributes.separated;
}
m_attributeCache[c] = buildCacheAttributes;
// Set-after spacing attributes
switch (charCode) {
case 0x00 ... 0x07: // Alphanumeric + foreground colour
buildCacheAttributes.foreColour = charCode;
buildCacheAttributes.mosaics = false;
buildCacheAttributes.holdChar = 0x20; // Switch from mosaics to alpha resets held mosaic
buildCacheAttributes.holdSeparated = false;
break;
case 0x10 ... 0x17: // Mosaic + foreground colour
buildCacheAttributes.foreColour = charCode & 0x07;
buildCacheAttributes.mosaics = true;
break;
case 0x0d: // Double height
case 0x0f: // Double size
doubleHeightAttrFound = true;
// fall-through
case 0x0e: // Double width
if (buildCacheAttributes.sizeCode != charCode) // Size CHANGE resets held mosaic to space
buildCacheAttributes.holdChar = 0x20;
buildCacheAttributes.sizeCode = charCode;
break;
case 0x1b: // ESC/switch
buildCacheAttributes.escSwitch ^= true;
break;
case 0x1f: // Release mosaics
buildCacheAttributes.held = false;
break;
}
}
if (doubleHeightAttrFound != m_rowHasDoubleHeightAttr[r]) {
m_rowHasDoubleHeightAttr[r] = doubleHeightAttrFound;
for (int dr=r; dr<24; dr++)
if (m_rowHasDoubleHeightAttr[dr]) {
m_rowHeight[dr] = TopHalf;
m_rowHeight[++dr] = BottomHalf;
} else
m_rowHeight[dr] = Normal;
}
}
textCharacter Level1Layer::character(int r, int c)
{
textCharacter result;
if (r != m_rowCached)
updateRowCache(r);
if (c > 39 || m_rowHeight[r] == BottomHalf)
return { 0x20, 0 };
result.code = m_levelOnePage->character(r, c);
if (m_levelOnePage->secondCharSet() != 0xf && m_attributeCache[c].escSwitch)
result.set = g0CharacterMap.value(((m_levelOnePage->secondCharSet() << 3) | m_levelOnePage->secondNOS()), 0);
else
result.set = g0CharacterMap.value(((m_levelOnePage->defaultCharSet() << 3) | m_levelOnePage->defaultNOS()), 0);
if (result.code < 0x20) {
result.code = m_attributeCache[c].held ? m_attributeCache[c].holdChar : 0x20;
if (m_attributeCache[c].held && c > 0)
result.set = 24+m_attributeCache[c].holdSeparated;
// else
// result.set = m_attributeCache[c].mosaics*24;
} else if (m_attributeCache[c].mosaics && (result.code & 0x20))
result.set = 24+m_attributeCache[c].separated;
return result;
}
void Level1Layer::attributes(int r, int c, applyAttributes *layerApplyAttributes)
{
unsigned char characterCode;
if (m_rowHeight[r] == BottomHalf) {
layerApplyAttributes->copyAboveAttributes = true;
return;
}
if (r != m_rowCached)
updateRowCache(r);
if (c == 0 || c == 40 || c == 56) {
// Start of row default conditions, also when crossing into side panels
layerApplyAttributes->applyForeColour = true;
layerApplyAttributes->attribute.foreColour = 0x07;
layerApplyAttributes->applyBackColour = true;
layerApplyAttributes->attribute.backColour = 0x20;
layerApplyAttributes->applyDisplayAttributes = true;
layerApplyAttributes->applyFlash = true;
layerApplyAttributes->attribute.flash.mode = 0;
layerApplyAttributes->attribute.flash.ratePhase = 0;
layerApplyAttributes->attribute.display.doubleHeight = false;
layerApplyAttributes->attribute.display.doubleWidth = false;
layerApplyAttributes->attribute.display.boxingWindow = false;
layerApplyAttributes->attribute.display.conceal = false;
layerApplyAttributes->attribute.display.invert = false;
layerApplyAttributes->attribute.display.underlineSeparated = false;
layerApplyAttributes->attribute.display.forceContiguous = false;
//TODO fontstyle
}
if (c > 39)
return;
if (c > 0) {
// Set-after
characterCode = m_levelOnePage->character(r, c-1);
switch (characterCode) {
case 0x00 ... 0x07: // Alphanumeric + Foreground colour
case 0x10 ... 0x17: // Mosaic + Foreground colour
layerApplyAttributes->applyForeColour = true;
layerApplyAttributes->attribute.foreColour = characterCode & 0x07;
layerApplyAttributes->attribute.display.conceal = false;
break;
case 0x08: // Flashing
layerApplyAttributes->applyFlash = true;
layerApplyAttributes->attribute.flash.mode = 1;
layerApplyAttributes->attribute.flash.ratePhase = 0;
break;
case 0x0a: // End box
if (m_levelOnePage->character(r, c) == 0x0a) {
layerApplyAttributes->applyBoxingOnly = true;
layerApplyAttributes->attribute.display.boxingWindow = false;
}
break;
case 0x0b: // Start box
if (m_levelOnePage->character(r, c) == 0x0b) {
layerApplyAttributes->applyBoxingOnly = true;
layerApplyAttributes->attribute.display.boxingWindow = true;
}
break;
case 0x0d: // Double height
layerApplyAttributes->applyTextSizeOnly = true;
layerApplyAttributes->attribute.display.doubleHeight = true;
layerApplyAttributes->attribute.display.doubleWidth = false;
break;
case 0x0e: // Double width
layerApplyAttributes->applyTextSizeOnly = true;
layerApplyAttributes->attribute.display.doubleHeight = false;
layerApplyAttributes->attribute.display.doubleWidth = true;
break;
case 0x0f: // Double size
layerApplyAttributes->applyTextSizeOnly = true;
layerApplyAttributes->attribute.display.doubleHeight = true;
layerApplyAttributes->attribute.display.doubleWidth = true;
break;
}
}
// Set-at
characterCode = m_levelOnePage->character(r, c);
switch (characterCode) {
case 0x09: // Steady
layerApplyAttributes->applyFlash = true;
layerApplyAttributes->attribute.flash.mode = 0;
layerApplyAttributes->attribute.flash.ratePhase = 0;
break;
case 0x0c: // Normal size
layerApplyAttributes->applyTextSizeOnly = true;
layerApplyAttributes->attribute.display.doubleHeight = false;
layerApplyAttributes->attribute.display.doubleWidth = false;
break;
case 0x18: // Conceal
layerApplyAttributes->applyConcealOnly = true;
layerApplyAttributes->attribute.display.conceal = true;
break;
case 0x19: // Contiguous mosaics
layerApplyAttributes->applyContiguousOnly = true;
break;
case 0x1c: // Black background
layerApplyAttributes->applyBackColour = true;
layerApplyAttributes->attribute.backColour = 0x20;
break;
case 0x1d: // New background
layerApplyAttributes->applyBackColour = true;
layerApplyAttributes->attribute.backColour = m_attributeCache[c].backColour;
break;
}
}
ActivePosition::ActivePosition()
{
m_row = m_column = -1;
}
bool ActivePosition::setRow(int newRow)
{
if (newRow < m_row)
return false;
if (newRow > m_row) {
m_row = newRow;
m_column = -1;
}
return true;
}
bool ActivePosition::setColumn(int newColumn)
{
if (newColumn < m_column)
return false;
if (m_row == -1)
m_row = 0;
m_column = newColumn;
return true;
}
/*
bool ActivePosition::setRowAndColumn(int newRow, int newColumn)
{
if (!setRow(newRow))
return false;
return setColumn(newColumn);
}
*/
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