mirror of
https://invent.kde.org/graphics/okular
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78 lines
3.4 KiB
C++
78 lines
3.4 KiB
C++
/***************************************************************************
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* Copyright (C) 2005 by Enrico Ros <eros.kde@email.it> *
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* *
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* This program 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 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#ifndef _OKULAR_PAGEPAINTER_H_
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#define _OKULAR_PAGEPAINTER_H_
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#include <QBrush>
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#include <QImage>
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#include <QPen>
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#include "core/area.h" // for NormalizedPoint
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class QPainter;
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class QRect;
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namespace Okular {
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class DocumentObserver;
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class Page;
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}
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/**
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* @short Paints a Okular::Page to an open painter using given flags.
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*/
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class Q_DECL_EXPORT PagePainter
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{
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public:
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// list of flags passed to the painting function. by OR-ing those flags
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// you can decide whether or not to permit drawing of a certain feature.
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enum PagePainterFlags { Accessibility = 1, EnhanceLinks = 2,
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EnhanceImages = 4, Highlights = 8,
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TextSelection = 16, Annotations = 32 };
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// draw (using painter 'p') the 'page' requested by 'observer' using features
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// in 'flags'. 'limits' is the bounding rect of the paint operation,
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// 'scaledWidth' and 'scaledHeight' the expected size of page contents
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static void paintPageOnPainter( QPainter * p, const Okular::Page * page, Okular::DocumentObserver *observer,
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int flags, int scaledWidth, int scaledHeight, const QRect & pageLimits );
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// draw (using painter 'p') the 'page' requested by 'observer' using features
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// in 'flags'.
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// 'pageLimits' is the bounding rect of the paint operation relative to the
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// top left of the (cropped) page.
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// 'scaledWidth' and 'scaledHeight' the size of the page pixmap (before cropping).
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// 'crop' is the (normalized) cropped rectangle within the page.
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// The painter's (0,0) is assumed to be top left of the painted ('pageLimits') rect.
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static void paintCroppedPageOnPainter( QPainter * p, const Okular::Page * page, Okular::DocumentObserver *observer,
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int flags, int scaledWidth, int scaledHeight, const QRect & pageLimits,
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const Okular::NormalizedRect & crop, Okular::NormalizedPoint *viewPortPoint );
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private:
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static void cropPixmapOnImage( QImage & dest, const QPixmap * src, const QRect & r );
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static void recolor(QImage *image, const QColor &foreground, const QColor &background);
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// set the alpha component of the image to a given value
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static void changeImageAlpha( QImage & image, unsigned int alpha );
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// my pretty dear raster function
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typedef QList< Okular::NormalizedPoint > NormalizedPath;
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enum RasterOperation { Normal, Multiply };
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static void drawShapeOnImage(
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QImage & image,
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const NormalizedPath & imagePoints,
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bool closeShape,
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const QPen & pen,
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const QBrush & brush = QBrush(),
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double penWidthMultiplier = 1.0,
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RasterOperation op = Normal
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//float antiAliasRadius = 1.0
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);
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};
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#endif
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