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Shading: Axial shading (first part)

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Jakub Melka
2019-08-25 18:16:37 +02:00
parent d6d112667d
commit 7e2d1b266f
15 changed files with 544 additions and 23 deletions
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26
PdfForQtLib/sources/pdfcolorspaces.h
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@@ -30,6 +30,7 @@ namespace pdf
class PDFArray;
class PDFObject;
class PDFStream;
class PDFPattern;
class PDFDocument;
class PDFDictionary;
class PDFAbstractColorSpace;
@@ -60,6 +61,7 @@ static constexpr const char* COLOR_SPACE_NAME_LAB = "Lab";
static constexpr const char* COLOR_SPACE_NAME_ICCBASED = "ICCBased";
static constexpr const char* COLOR_SPACE_NAME_INDEXED = "Indexed";
static constexpr const char* COLOR_SPACE_NAME_SEPARATION = "Separation";
static constexpr const char* COLOR_SPACE_NAME_PATTERN = "Pattern";
static constexpr const char* CAL_WHITE_POINT = "WhitePoint";
static constexpr const char* CAL_BLACK_POINT = "BlackPoint";
@@ -209,6 +211,10 @@ public:
virtual size_t getColorComponentCount() const = 0;
virtual QImage getImage(const PDFImageData& imageData) const;
/// Checks, if number of color components is OK, and if yes, converts them to the QColor value.
/// If they are not OK, exception is thrown.
QColor getCheckedColor(const PDFColor& color) const;
/// Parses the desired color space. If desired color space is not found, then exception is thrown.
/// If everything is OK, then shared pointer to the new color space is returned.
/// \param colorSpaceDictionary Dictionary containing color spaces of the page
@@ -227,6 +233,9 @@ public:
const PDFDocument* document,
const QByteArray& name);
/// Converts a vector of real numbers to the PDFColor
static PDFColor convertToColor(const std::vector<PDFReal>& components);
protected:
/// Clips the color component to range [0, 1]
static constexpr PDFColorComponent clip01(PDFColorComponent component) { return qBound<PDFColorComponent>(0.0, component, 1.0); }
@@ -511,8 +520,23 @@ private:
PDFFunctionPtr m_tintTransform;
};
class PDFPatternColorSpace : public PDFAbstractColorSpace
{
public:
explicit PDFPatternColorSpace(std::shared_ptr<PDFPattern>&& pattern) : m_pattern(qMove(pattern)) { }
virtual ~PDFPatternColorSpace() override = default;
virtual QColor getDefaultColor() const override;
virtual QColor getColor(const PDFColor& color) const override;
virtual size_t getColorComponentCount() const override;
const PDFPattern* getPattern() const { return m_pattern.get(); }
private:
std::shared_ptr<PDFPattern> m_pattern;
};
// TODO: Implement DeviceN color space
// TODO: Implement Pattern color space
} // namespace pdf