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/* poppler-annotation-helper.h: qt interface to poppler
* Copyright (C) 2006, 2008, 2017-2019, 2021, Albert Astals Cid <[email protected]>
* Copyright (C) 2008, Pino Toscano <[email protected]>
* Copyright (C) 2012, Fabio D'Urso <[email protected]>
* Copyright (C) 2018, Dileep Sankhla <[email protected]>
* Copyright (C) 2018, Carlos Garcia Campos <[email protected]>
* Copyright (C) 2018, 2019, Oliver Sander <[email protected]>
* Adapting code from
* Copyright (C) 2004 by Enrico Ros <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef _POPPLER_ANNOTATION_HELPER_H_
#define _POPPLER_ANNOTATION_HELPER_H_
#include <memory>
#include <QtCore/QDebug>
#include <Object.h>
class QColor;
class AnnotColor;
namespace Poppler {
class XPDFReader
{
public:
// transform from user coords to normalized ones using the matrix M
static inline void transform(double *M, double x, double y, QPointF &res);
static inline void invTransform(const double *M, const QPointF p, double &x, double &y);
};
void XPDFReader::transform(double *M, double x, double y, QPointF &res)
{
res.setX(M[0] * x + M[2] * y + M[4]);
res.setY(M[1] * x + M[3] * y + M[5]);
}
void XPDFReader::invTransform(const double *M, const QPointF p, double &x, double &y)
{
const double det = M[0] * M[3] - M[1] * M[2];
if (det == 0) {
qWarning("Tried to invert singular matrix, something won't work");
x = 0;
y = 0;
return;
}
const double invM[4] = { M[3] / det, -M[1] / det, -M[2] / det, M[0] / det };
const double xt = p.x() - M[4];
const double yt = p.y() - M[5];
x = invM[0] * xt + invM[2] * yt;
y = invM[1] * xt + invM[3] * yt;
}
QColor convertAnnotColor(const AnnotColor *color);
std::unique_ptr<AnnotColor> convertQColor(const QColor &color);
}
#endif
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