c5e3fd5668
Previously every character on the page was drawn up to six times. Now the page is drawn once, quickly copied up to five times and then only the flashing characters are redrawn on the copies.
82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
/*
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* Copyright (C) 2020-2023 Gavin MacGregor
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*
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* This file is part of QTeletextMaker.
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*
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* QTeletextMaker is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* QTeletextMaker is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with QTeletextMaker. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef RENDER_H
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#define RENDER_H
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#include <QBitmap>
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#include <QPixmap>
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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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static int s_instances;
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static QBitmap* s_fontBitmap;
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};
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class TeletextPageRender : public QObject
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{
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Q_OBJECT
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public:
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TeletextPageRender();
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~TeletextPageRender();
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QPixmap* pagePixmap(int i) const { return m_pagePixmap[i]; };
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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 setShowControlCodes(bool);
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signals:
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void flashChanged(int);
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protected:
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TeletextFontBitmap m_fontBitmap;
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QPixmap* m_pagePixmap[6];
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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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int m_flashBuffersHz;
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int m_flashingRow[25];
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private:
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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 renderRow(int, int, bool force=false);
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void setRowFlashStatus(int, int);
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TeletextPageDecode *m_decoder;
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};
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#endif
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