daniel/QTeletextMaker
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Implement DRCS rendering

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External pages with DRCS definitions can be loaded using the options in the
"DRCS pages" submenu within the "View" menu. Two DRCS pages can be loaded,
one for Global DRCS definitions and the other for Normal DRCS definitions.

Level 2.5 mode 0 PTUs are fully supported.

Partial support for Level 3.5 mode 1, 2 and 3 PTUs. DCLUTs defined in X/28/1
on the main page are not yet implemented; the characters currently appear in
the default DCLUTs described in D.1.6 and D.2.2 of the ETSI spec.
This commit is contained in:
Gavin MacGregor
2025-06-09 18:57:16 +01:00
parent 519c961cff
commit e1ba67484f
8 changed files with 536 additions and 8 deletions
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38
src/qteletextdecoder/decode.h
View File

@@ -20,11 +20,14 @@
#ifndef DECODE_H
#define DECODE_H
#include <QImage>
#include <QList>
#include <QMap>
#include <QMultiMap>
#include "drcspage.h"
#include "levelonepage.h"
#include "pagebase.h"
class TeletextPageDecode : public QObject
{
@@ -32,6 +35,9 @@ class TeletextPageDecode : public QObject
public:
enum CharacterFragment { NormalSize, DoubleHeightTopHalf, DoubleHeightBottomHalf, DoubleWidthLeftHalf, DoubleWidthRightHalf, DoubleSizeTopLeftQuarter, DoubleSizeTopRightQuarter, DoubleSizeBottomLeftQuarter, DoubleSizeBottomRightQuarter };
enum DRCSPageType { NormalDRCSPage, GlobalDRCSPage };
// enum ObjectPageType { NormalPOPage = 2, GlobalPOPage };
enum DRCSSource { NoDRCS, NormalDRCS, GlobalDRCS };
enum RowHeight { NormalHeight, TopHalf, BottomHalf };
TeletextPageDecode();
@@ -42,6 +48,9 @@ public:
void decodePage();
LevelOnePage *teletextPage() const { return m_levelOnePage; };
void setTeletextPage(LevelOnePage *newCurrentPage);
QList<DRCSPage> *drcsPage(DRCSPageType pageType) const { return m_drcsPage[pageType]; };
void setDRCSPage(DRCSPageType pageType, QList<DRCSPage> *pages);
void clearDRCSPage(DRCSPageType pageType);
void updateSidePanels();
unsigned char cellCharacterCode(int r, int c) const { return m_cell[r][c].character.code; };
@@ -49,6 +58,13 @@ public:
int cellCharacterDiacritical(int r, int c) const { return m_cell[r][c].character.diacritical; };
int cellG0CharacterSet(int r, int c) const { return m_cell[r][c].g0Set; };
int cellG2CharacterSet(int r, int c) const { return m_cell[r][c].g2Set; };
DRCSSource cellDrcsSource(int r, int c) const { return m_cell[r][c].character.drcsSource; };
int cellDrcsSubTable(int r, int c) const { return m_cell[r][c].character.drcsSubTable; };
int cellDrcsCharacter(int r, int c) const { return m_cell[r][c].character.drcsChar; };
QImage drcsImage(DRCSSource pageType, int subTable, int chr, bool flashPhOn = true);
int cellForegroundCLUT(int r, int c) const { return m_cell[r][c].attribute.foregroundCLUT; };
int cellBackgroundCLUT(int r, int c) const { return m_cell[r][c].attribute.backgroundCLUT; };
QColor cellForegroundQColor(int r, int c);
@@ -103,13 +119,19 @@ private:
unsigned char code=0x20;
int set=0;
int diacritical=0;
DRCSSource drcsSource=NoDRCS;
int drcsSubTable=0;
int drcsChar=0;
};
friend inline bool operator!=(const textCharacter &lhs, const textCharacter &rhs)
{
return lhs.code != rhs.code ||
lhs.set != rhs.set ||
lhs.diacritical != rhs.diacritical;
return lhs.code != rhs.code ||
lhs.set != rhs.set ||
lhs.diacritical != rhs.diacritical ||
lhs.drcsSource != rhs.drcsSource ||
lhs.drcsSubTable != rhs.drcsSubTable ||
lhs.drcsChar != rhs.drcsChar;
}
struct flashFunctions {
@@ -179,12 +201,21 @@ private:
lhs.fragment != rhs.fragment;
}
struct drcsMode {
bool level2p5=true;
bool level3p5=true;
bool used=false;
int subTable=0;
};
struct textPainter {
textAttributes attribute;
textCell result;
textCell rightHalfCell;
textCell bottomHalfCell[72];
drcsMode gDrcs, nDrcs;
int styleSpreadRows=0;
int setProportionalRows[72], clearProportionalRows[72];
int setBoldRows[72], clearBoldRows[72];
@@ -267,6 +298,7 @@ private:
bool m_cellLevel1MosaicChar[25][40];
int m_cellLevel1CharSet[25][40];
LevelOnePage* m_levelOnePage;
QList<DRCSPage>* m_drcsPage[2];
int m_fullRowColour[25];
QColor m_fullRowQColor[25];
QList<Invocation> m_invocations[3];