mirror of
https://github.com/JakubMelka/PDF4QT.git
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89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
// Copyright (C) 2020-2021 Jakub Melka
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//
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// This file is part of PDF4QT.
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//
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// PDF4QT is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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// with the written consent of the copyright owner, any later version.
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//
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// PDF4QT 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with PDF4QT. If not, see <https://www.gnu.org/licenses/>.
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#ifndef PDFPAINTERUTILS_H
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#define PDFPAINTERUTILS_H
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#include "pdfglobal.h"
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#include <QPainter>
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namespace pdf
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{
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class PDFPageContentProcessorState;
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/// RAII wrapper for painter save/restore
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class PDFPainterStateGuard
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{
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public:
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explicit inline PDFPainterStateGuard(QPainter* painter) :
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m_painter(painter)
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{
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m_painter->save();
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}
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inline ~PDFPainterStateGuard()
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{
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m_painter->restore();
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}
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private:
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QPainter* m_painter;
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};
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struct PDFTransformationDecomposition
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{
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double rotationAngle = 0.0;
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double shearFactor = 0.0;
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double scaleX = 0.0;
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double scaleY = 0.0;
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double translateX = 0.0;
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double translateY = 0.0;
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};
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class PDF4QTLIBCORESHARED_EXPORT PDFPainterHelper
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{
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public:
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/// Draws bubble using painter. Bubble is aligned to the point, colored with color
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/// and inside bubble, text is being paint. Bubble bounding box is being returned.
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/// \param painter Painter
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/// \param point Position of the bubble
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/// \param color Color of the bubble
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/// \param text Text inside the bubble
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/// \param alignment Bubble alignment relative to the bubble position point
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static QRect drawBubble(QPainter* painter, QPoint point, QColor color, QString text, Qt::Alignment alignment);
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/// Creates pen from painter graphicState
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static QPen createPenFromState(const PDFPageContentProcessorState* graphicState, double alpha);
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/// Creates brush from painter graphicState
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static QBrush createBrushFromState(const PDFPageContentProcessorState* graphicState, double alpha);
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static void applyPenToGraphicState(PDFPageContentProcessorState* graphicState, const QPen& pen);
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static void applyBrushToGraphicState(PDFPageContentProcessorState* graphicState, const QBrush& brush);
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/// Decompose transform
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static PDFTransformationDecomposition decomposeTransform(const QTransform& transform);
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/// Compose transform
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static QTransform composeTransform(const PDFTransformationDecomposition& decomposition);
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};
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} // namespace pdf
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#endif // PDFPAINTERUTILS_H
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