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.
This commit is contained in:
G.K.MacGregor
223
render.h
223
render.h
@@ -21,169 +21,17 @@
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#define RENDER_H
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#include <QBitmap>
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#include <QMap>
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#include <QMultiMap>
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#include <QPair>
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#include <vector>
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#include <QSet>
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#include <QPixmap>
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#include "levelonepage.h"
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struct textCharacter {
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unsigned char code=0x20;
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int set=0;
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int diacritical=0;
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};
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struct displayAttributes {
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bool doubleHeight=false;
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bool doubleWidth=false;
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bool boxingWindow=false;
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bool conceal=false;
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bool invert=false;
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bool underlineSeparated=false;
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bool forceContiguous=false;
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};
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struct textAttributes {
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int foreColour=0x07;
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int backColour=0x00;
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struct flashFunctions {
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int mode=0;
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int ratePhase=0;
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int phaseNumber=0;
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} flash;
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displayAttributes display;
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/* font style */
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};
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struct textCell {
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textCharacter character;
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textAttributes attribute;
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bool bottomHalf=false;
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bool rightHalf=false;
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bool level1Mosaic=false;
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int level1CharSet=0;
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};
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struct applyAttributes {
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bool applyForeColour=false;
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bool applyBackColour=false;
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bool applyFlash=false;
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bool applyDisplayAttributes=false;
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bool applyTextSizeOnly=false;
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bool applyBoxingOnly=false;
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bool applyConcealOnly=false;
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bool applyContiguousOnly=false;
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bool copyAboveAttributes=false;
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textAttributes attribute;
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};
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class ActivePosition
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{
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public:
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ActivePosition();
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int row() const { return (m_row == -1) ? 0 : m_row; }
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int column() const { return (m_column == -1) ? 0 : m_column; }
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bool isDeployed() const { return m_row != -1; }
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bool setRow(int);
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bool setColumn(int);
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// bool setRowAndColumn(int, int);
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private:
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int m_row, m_column;
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};
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class TextLayer
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{
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public:
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// TextLayer(TeletextPage* thePage) : currentPage(thePage) { };
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virtual ~TextLayer() = default;
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void setTeletextPage(LevelOnePage *);
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virtual textCharacter character(int, int) =0;
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virtual void attributes(int, int, applyAttributes *) =0;
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virtual int fullScreenColour() const =0;
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virtual int fullRowColour(int) const =0;
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virtual bool fullRowDownwards(int) const =0;
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virtual int objectType() const =0;
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virtual int originR() const { return 0; };
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virtual int originC() const { return 0; };
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void setFullScreenColour(int);
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void setFullRowColour(int, int, bool);
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// Key QPair is row and column, value QPair is triplet mode and data
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QMultiMap<QPair<int, int>, QPair<int, int>> enhanceMap;
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protected:
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LevelOnePage* m_levelOnePage;
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int m_layerFullScreenColour=-1;
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int m_layerFullRowColour[25];
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bool m_layerFullRowDownwards[25];
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applyAttributes m_applyAttributes;
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};
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class EnhanceLayer: public TextLayer
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{
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public:
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EnhanceLayer();
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textCharacter character(int, int);
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void attributes(int, int, applyAttributes *);
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int fullScreenColour() const { return m_layerFullScreenColour; };
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int fullRowColour(int r) const { return m_layerFullRowColour[r]; };
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bool fullRowDownwards(int r) const { return m_layerFullRowDownwards[r]; };
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int objectType() const { return m_objectType; };
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int originR() const { return m_originR; };
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int originC() const { return m_originC; };
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void setObjectType(int);
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void setOrigin(int, int);
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protected:
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int m_objectType=0;
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int m_originR=0;
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int m_originC=0;
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int m_rowCached=-1;
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int m_rightMostColumn[25];
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};
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class Level1Layer: public TextLayer
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{
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public:
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// Level1Layer(TeletextPage *thePage) : TextLayer(thePage) { };
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Level1Layer();
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textCharacter character(int, int);
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void attributes(int, int, applyAttributes *);
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int fullScreenColour() const { return -1; };
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int fullRowColour(int) const { return -1; };
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bool fullRowDownwards(int) const { return false; };
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int objectType() const { return 0; }
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bool isRowBottomHalf(int r) const { return m_rowHeight[r]==RHbottomhalf; }
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private:
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void updateRowCache(int);
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struct level1CacheAttributes {
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int foreColour=0x07;
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int backColour=0x00;
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unsigned char sizeCode=0x0c;
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bool mosaics=false;
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bool separated=false;
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bool held=false;
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bool escSwitch=false;
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unsigned char holdChar=0x20;
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bool holdSeparated=false;
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};
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level1CacheAttributes m_attributeCache[40];
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int m_rowCached=-1;
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bool m_rowHasDoubleHeightAttr[25];
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enum rowHeightEnum { RHnormal=-1, RHtophalf, RHbottomhalf } m_rowHeight[25];
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};
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#include "decode.h"
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class TeletextFontBitmap
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{
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public:
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TeletextFontBitmap();
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~TeletextFontBitmap();
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QBitmap *rawBitmap() const { return s_fontBitmap; }
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private:
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@@ -198,67 +46,38 @@ class TeletextPageRender : public QObject
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public:
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TeletextPageRender();
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~TeletextPageRender();
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void decodePage();
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void renderPage();
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void renderPage(int r);
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bool mix() const { return m_mix; };
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bool showCodes() const { return m_showCodes; };
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void setTeletextPage(LevelOnePage *);
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void updateSidePanels();
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void buildEnhanceMap(TextLayer *, int=0);
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QPixmap* pagePixmap(int i) const { return m_pagePixmap[i]; };
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bool level1MosaicAttribute(int r, int c) const { return m_cell[r][c].level1Mosaic; };
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int level1CharSet(int r, int c) const { return m_cell[r][c].level1CharSet; };
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int leftSidePanelColumns() const { return m_leftSidePanelColumns; };
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int rightSidePanelColumns() const { return m_rightSidePanelColumns; };
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bool mix() const { return m_mix; };
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void setDecoder(TeletextPageDecode *);
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void renderPage(bool force=false);
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bool showControlCodes() const { return m_showControlCodes; };
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public slots:
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void colourChanged(int);
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void setReveal(bool);
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void setMix(bool);
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void setShowCodes(bool);
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void setRenderLevel(int);
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void setShowControlCodes(bool);
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signals:
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void fullScreenColourChanged(QColor);
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void fullRowColourChanged(int, QColor);
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void flashChanged(int);
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void sidePanelsChanged();
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protected:
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void updateFlashRequired(int);
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inline void setFullScreenColour(int);
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inline void setFullRowColour(int, int);
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TeletextFontBitmap m_fontBitmap;
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QPixmap* m_pagePixmap[6];
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int m_finalFullScreenColour, m_renderLevel;
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QColor m_finalFullScreenQColor;
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int m_leftSidePanelColumns, m_rightSidePanelColumns;
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bool m_reveal, m_mix, m_showCodes;
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Level1Layer m_level1Layer;
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std::vector<TextLayer *> m_textLayer;
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const int m_foregroundRemap[8] = { 0, 0, 0, 8, 8, 16, 16, 16 };
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const int m_backgroundRemap[8] = { 0, 8, 16, 8, 16, 8, 16, 24 };
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textCell m_cell[25][72];
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unsigned char m_controlCodeCache[25][40];
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bool m_reveal, m_mix, m_showControlCodes;
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QSet<QPair<int, int>> m_flash1HzCells;
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QSet<QPair<int, int>> m_flash2HzCells;
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int m_flashBuffersHz;
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private:
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textCell m_cell[25][72];
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LevelOnePage* m_levelOnePage;
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int m_flashRequired;
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int m_fullRowColour[25];
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QColor m_fullRowQColor[25];
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int m_flashRow[25];
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bool m_concealRow[25];
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};
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inline void drawFromFontBitmap(QPainter &, int, int, unsigned char, int, TeletextPageDecode::CharacterFragment);
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inline void drawCharacter(QPainter &, int, int, unsigned char, int, int, TeletextPageDecode::CharacterFragment);
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void updateFlashBuffers();
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static const QMap<int, int> g0CharacterMap {
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{ 0x00, 12 }, { 0x01, 15 }, { 0x02, 22 }, { 0x03, 16 }, { 0x04, 14 }, { 0x05, 19 }, { 0x06, 11 },
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{ 0x08, 18 }, { 0x09, 15 }, { 0x0a, 22 }, { 0x0b, 16 }, { 0x0c, 14 }, { 0x0e, 11 },
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{ 0x10, 12 }, { 0x11, 15 }, { 0x12, 22 }, { 0x13, 16 }, { 0x14, 14 }, { 0x15, 19 }, { 0x16, 23 },
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{ 0x1d, 21 }, { 0x1f, 20 },
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{ 0x20, 1 }, { 0x21, 15 }, { 0x22, 13 }, { 0x23, 17 }, { 0x24, 2 }, { 0x25, 3 }, { 0x26, 11 },
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{ 0x36, 23 }, { 0x37, 4 },
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{ 0x40, 12 }, { 0x44, 14 }, { 0x47, 5 },
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{ 0x55, 6 }, { 0x57, 5 }
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TeletextPageDecode *m_decoder;
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};
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#endif
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