File indexing completed on 2022-12-06 18:50:21

0001 /*
0002     SPDX-License-Identifier: GPL-2.0-or-later
0003     SPDX-FileCopyrightText: 2019 Sirgienko Nikita <warquark@gmail.com>
0004 */
0005 #ifndef MATHRENDER_H
0006 #define MATHRENDER_H
0007 
0008 #include <QObject>
0009 #include <QTextImageFormat>
0010 #include <QMutex>
0011 
0012 #include "lib/latexrenderer.h"
0013 
0014 /**
0015  * Special class for rendering embedded math in MarkdownEntry and TextEntry
0016  * Instead of LatexRenderer+EpsRenderer provide all needed functianality in one class
0017  * Even if we add some speed optimization in future, API of the class probably won't change
0018  */
0019 class MathRenderer : public QObject {
0020   Q_OBJECT
0021   public:
0022 
0023     MathRenderer();
0024     ~MathRenderer();
0025 
0026     static bool mathRenderAvailable();
0027 
0028     // Resulution contol
0029     void setScale(qreal scale);
0030     qreal scale();
0031     void useHighResolution(bool b);
0032 
0033     /**
0034      * This function will run render task in Qt thread pool and
0035      * call resultHandler SLOT with MathRenderResult* argument on finish
0036      * receiver will be managed about pointer, task only create it
0037      */
0038     void renderExpression(
0039         int jobId,
0040         const QString& mathExpression,
0041         Cantor::LatexRenderer::EquationType type,
0042         const QObject *receiver,
0043         const char *resultHandler);
0044 
0045 
0046     /**
0047      * Rerender renderer math expression in document
0048      * Unlike MathRender::renderExpression this method isn't async, because
0049      * rerender already rendered math is not long operation
0050      */
0051     void rerender(QTextDocument* document, const QTextImageFormat& math);
0052 
0053     /**
0054      * Render math expression from existing .pdf
0055      * Like MathRenderer::rerender is blocking
0056      */
0057     std::pair<QTextImageFormat, QImage> renderExpressionFromPdf(
0058         const QString& filename, const QString& uuid, const QString& code, Cantor::LatexRenderer::EquationType type, bool* success
0059     );
0060 
0061   private:
0062     double m_scale;
0063     bool m_useHighRes;
0064 };
0065 
0066 #endif /* MATHRENDER_H */