mirror of https://github.com/JakubMelka/PDF4QT.git
171 lines
4.4 KiB
C++
171 lines
4.4 KiB
C++
// Copyright (C) 2018-2021 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 PDFGLOBAL_H
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#define PDFGLOBAL_H
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#include <QtCore>
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#include <QtGlobal>
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#include <limits>
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#include <tuple>
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#include <array>
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#if defined(Pdf4QtLIB_LIBRARY)
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# define Pdf4QtLIBSHARED_EXPORT Q_DECL_EXPORT
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#else
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# define Pdf4QtLIBSHARED_EXPORT Q_DECL_IMPORT
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#endif
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namespace pdf
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{
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using PDFInteger = int64_t;
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using PDFReal = double;
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using PDFColorComponent = float;
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using PDFGray = PDFColorComponent;
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using PDFRGB = std::array<PDFColorComponent, 3>;
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using PDFCMYK = std::array<PDFColorComponent, 4>;
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// These constants define minimum/maximum integer and are defined in such a way,
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// that even 100 times bigger integers are representable.
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constexpr PDFInteger PDF_INTEGER_MIN = std::numeric_limits<int64_t>::min() / 100;
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constexpr PDFInteger PDF_INTEGER_MAX = std::numeric_limits<int64_t>::max() / 100;
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constexpr PDFReal PDF_EPSILON = 0.000001;
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static constexpr bool isValidInteger(PDFInteger integer)
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{
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return integer >= PDF_INTEGER_MIN && integer <= PDF_INTEGER_MAX;
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}
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static inline bool isZero(PDFReal value)
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{
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return std::fabs(value) < PDF_EPSILON;
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}
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/// This structure represents a reference to the object - consisting of the
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/// object number, and generation number.
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struct PDFObjectReference
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{
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constexpr inline PDFObjectReference() :
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objectNumber(0),
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generation(0)
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{
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}
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constexpr inline PDFObjectReference(PDFInteger objectNumber, PDFInteger generation) :
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objectNumber(objectNumber),
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generation(generation)
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{
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}
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PDFInteger objectNumber;
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PDFInteger generation;
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constexpr bool operator==(const PDFObjectReference& other) const
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{
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return objectNumber == other.objectNumber && generation == other.generation;
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}
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constexpr bool operator!=(const PDFObjectReference& other) const { return !(*this == other); }
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constexpr bool operator<(const PDFObjectReference& other) const
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{
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return std::tie(objectNumber, generation) < std::tie(other.objectNumber, other.generation);
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}
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constexpr bool isValid() const { return objectNumber > 0; }
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};
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/// Represents version identification
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struct PDFVersion
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{
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constexpr explicit PDFVersion() = default;
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constexpr explicit PDFVersion(uint16_t major, uint16_t minor) :
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major(major),
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minor(minor)
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{
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}
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uint16_t major = 0;
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uint16_t minor = 0;
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bool isValid() const { return major > 0; }
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};
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struct PDFTranslationContext
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{
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Q_DECLARE_TR_FUNCTIONS(pdf::PDFTranslationContext)
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};
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constexpr PDFReal PDF_POINT_TO_INCH = 1.0 / 72.0;
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constexpr PDFReal PDF_INCH_TO_MM = 25.4; // [mm / inch]
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constexpr PDFReal PDF_POINT_TO_MM = PDF_POINT_TO_INCH * PDF_INCH_TO_MM;
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/// This is default "DPI", but in milimeters, so the name is DPMM (device pixel per milimeter)
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constexpr PDFReal PDF_DEFAULT_DPMM = 96.0 / PDF_INCH_TO_MM;
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constexpr PDFReal convertPDFPointToMM(PDFReal point)
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{
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return point * PDF_POINT_TO_MM;
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}
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class PDFBoolGuard final
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{
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public:
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inline explicit PDFBoolGuard(bool& value) :
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m_value(value),
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m_oldValue(value)
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{
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m_value = true;
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}
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inline ~PDFBoolGuard()
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{
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m_value = m_oldValue;
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}
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private:
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bool& m_value;
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bool m_oldValue;
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};
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enum class RendererEngine
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{
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Software,
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OpenGL
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};
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enum class RenderingIntent
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{
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Auto, ///< Rendering intent is automatically selected
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Perceptual,
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AbsoluteColorimetric,
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RelativeColorimetric,
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Saturation,
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Unknown
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};
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} // namespace pdf
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#endif // PDFGLOBAL_H
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