| 1 | /* poppler-annotation-helper.h: qt interface to poppler |
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| 2 | * Copyright (C) 2006, 2008, 2017-2019, 2021, Albert Astals Cid <aacid@kde.org> |
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| 3 | * Copyright (C) 2008, Pino Toscano <pino@kde.org> |
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| 4 | * Copyright (C) 2012, Fabio D'Urso <fabiodurso@hotmail.it> |
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| 5 | * Copyright (C) 2018, Dileep Sankhla <sankhla.dileep96@gmail.com> |
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| 6 | * Copyright (C) 2018, Carlos Garcia Campos <carlosgc@gnome.org> |
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| 7 | * Copyright (C) 2018, 2019, Oliver Sander <oliver.sander@tu-dresden.de> |
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| 8 | * Adapting code from |
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| 9 | * Copyright (C) 2004 by Enrico Ros <eros.kde@email.it> |
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| 10 | * |
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| 11 | * This program is free software; you can redistribute it and/or modify |
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| 12 | * it under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; either version 2, or (at your option) |
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| 14 | * any later version. |
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| 15 | * |
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| 16 | * This program is distributed in the hope that it will be useful, |
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 19 | * GNU General Public License for more details. |
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| 20 | * |
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| 21 | * You should have received a copy of the GNU General Public License |
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| 22 | * along with this program; if not, write to the Free Software |
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| 23 | * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
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| 24 | */ |
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| 25 | |
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| 26 | #ifndef _POPPLER_ANNOTATION_HELPER_H_ |
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| 27 | #define _POPPLER_ANNOTATION_HELPER_H_ |
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| 28 | |
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| 29 | #include <memory> |
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| 30 | |
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| 31 | #include <QtCore/QDebug> |
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| 32 | |
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| 33 | #include <Object.h> |
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| 34 | |
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| 35 | class QColor; |
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| 36 | |
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| 37 | class AnnotColor; |
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| 38 | |
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| 39 | namespace Poppler { |
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| 40 | |
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| 41 | class XPDFReader |
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| 42 | { |
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| 43 | public: |
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| 44 | // transform from user coords to normalized ones using the matrix M |
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| 45 | static inline void transform(double *M, double x, double y, QPointF &res); |
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| 46 | static inline void invTransform(const double *M, const QPointF p, double &x, double &y); |
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| 47 | }; |
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| 48 | |
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| 49 | void XPDFReader::transform(double *M, double x, double y, QPointF &res) |
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| 50 | { |
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| 51 | res.setX(M[0] * x + M[2] * y + M[4]); |
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| 52 | res.setY(M[1] * x + M[3] * y + M[5]); |
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| 53 | } |
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| 54 | |
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| 55 | void XPDFReader::invTransform(const double *M, const QPointF p, double &x, double &y) |
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| 56 | { |
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| 57 | const double det = M[0] * M[3] - M[1] * M[2]; |
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| 58 | if (det == 0) { |
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| 59 | qWarning(msg: "Tried to invert singular matrix, something won't work" ); |
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| 60 | x = 0; |
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| 61 | y = 0; |
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| 62 | return; |
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| 63 | } |
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| 64 | |
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| 65 | const double invM[4] = { M[3] / det, -M[1] / det, -M[2] / det, M[0] / det }; |
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| 66 | const double xt = p.x() - M[4]; |
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| 67 | const double yt = p.y() - M[5]; |
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| 68 | |
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| 69 | x = invM[0] * xt + invM[2] * yt; |
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| 70 | y = invM[1] * xt + invM[3] * yt; |
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| 71 | } |
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| 72 | |
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| 73 | QColor convertAnnotColor(const AnnotColor *color); |
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| 74 | std::unique_ptr<AnnotColor> convertQColor(const QColor &color); |
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| 75 | |
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| 76 | } |
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| 77 | |
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| 78 | #endif |
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| 79 | |
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