mirror of https://github.com/JakubMelka/PDF4QT.git
77 lines
3.1 KiB
C++
77 lines
3.1 KiB
C++
// Copyright (C) 2019 Jakub Melka
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//
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// This file is part of PdfForQt.
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//
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// PdfForQt 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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// (at your option) any later version.
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//
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// PdfForQt 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 PDFForQt. If not, see <https://www.gnu.org/licenses/>.
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#ifndef PDFRENDERER_H
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#define PDFRENDERER_H
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#include "pdfpage.h"
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#include "pdfexception.h"
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class QPainter;
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namespace pdf
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{
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class PDFFontCache;
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class PDFOptionalContentActivity;
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/// Renders the PDF page on the painter, or onto an image.
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class PDFRenderer
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{
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public:
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enum Feature
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{
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Antialiasing = 0x0001, ///< Antialiasing for lines, shapes, etc.
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TextAntialiasing = 0x0002, ///< Antialiasing for drawing text
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SmoothImages = 0x0004, ///< Adjust images to the device space using smooth transformation (slower, but better image quality)
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IgnoreOptionalContent = 0x0008, ///< Ignore optional content (so all is drawn ignoring settings of optional content)
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};
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Q_DECLARE_FLAGS(Features, Feature)
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explicit PDFRenderer(const PDFDocument* document, const PDFFontCache* fontCache, const PDFOptionalContentActivity* optionalContentActivity, Features features);
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/// Paints desired page onto the painter. Page is painted in the rectangle using best-fit method.
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/// If the page doesn't exist, then error is returned. No exception is thrown. Rendering errors
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/// are reported and returned in the error list. If no error occured, empty list is returned.
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/// \param painter Painter
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/// \param rectangle Paint area for the page
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/// \param pageIndex Index of the page to be painted
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QList<PDFRenderError> render(QPainter* painter, const QRectF& rectangle, size_t pageIndex) const;
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/// Paints desired page onto the painter. Page is painted using \p matrix, which maps page coordinates
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/// to the device coordinates. If the page doesn't exist, then error is returned. No exception is thrown.
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/// Rendering errors are reported and returned in the error list. If no error occured, empty list is returned.
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QList<PDFRenderError> render(QPainter* painter, const QMatrix& matrix, size_t pageIndex) const;
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/// Returns default renderer features
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static constexpr Features getDefaultFeatures() { return Antialiasing | TextAntialiasing; }
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private:
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const PDFDocument* m_document;
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const PDFFontCache* m_fontCache;
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const PDFOptionalContentActivity* m_optionalContentActivity;
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Features m_features;
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};
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} // namespace pdf
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Q_DECLARE_OPERATORS_FOR_FLAGS(pdf::PDFRenderer::Features)
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#endif // PDFRENDERER_H
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