fenix/PDF4QT
1
0
Fork 0
mirror of https://github.com/JakubMelka/PDF4QT.git synced 2025-06-05 21:59:17 +02:00
Code Issues Packages Projects Releases Wiki Activity

Soft masks for images

Browse Source
This commit is contained in:
Jakub Melka
2019-10-05 15:11:53 +02:00
parent 76c5f5a11c
commit f8d72d1960
5 changed files with 277 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
PdfForQtLib/sources/pdfcolorspaces.h
View File

@@ -87,6 +87,7 @@ public:
ColorKeyMasking, ///< Masking by color key
Image, ///< Masking by image with alpha mask
ImageMask, ///< Masking by 1-bit image (see "ImageMask" entry in image's dictionary), current color from the graphic state is used to paint an image
SoftMask, ///< Image is masked by soft mask
};
explicit PDFImageData() :
@@ -108,7 +109,8 @@ public:
MaskingType maskingType,
QByteArray data,
std::vector<PDFInteger>&& colorKeyMask,
std::vector<PDFReal>&& decode) :
std::vector<PDFReal>&& decode,
std::vector<PDFReal>&& matte) :
m_components(components),
m_bitsPerComponent(bitsPerComponent),
m_width(width),
@@ -117,7 +119,8 @@ public:
m_maskingType(maskingType),
m_data(qMove(data)),
m_colorKeyMask(qMove(colorKeyMask)),
m_decode(qMove(decode))
m_decode(qMove(decode)),
m_matte(qMove(matte))
{
}
@@ -131,6 +134,7 @@ public:
const QByteArray& getData() const { return m_data; }
const std::vector<PDFInteger>& getColorKeyMask() const { return m_colorKeyMask; }
const std::vector<PDFReal>& getDecode() const { return m_decode; }
const std::vector<PDFReal>& getMatte() const { return m_matte; }
/// Returns number of color channels
unsigned int getColorChannels() const { return m_components; }
@@ -162,6 +166,10 @@ private:
/// then contains n pairs of numbers, where n is number of color components. If ImageMask
/// in the image dictionary is true, then decode array should be [0 1] or [1 0].
std::vector<PDFReal> m_decode;
/// Matte color (color, agains which is image preblended, when using soft masking
/// image (defined for soft masks).
std::vector<PDFReal> m_matte;
};
using PDFColor3 = std::array<PDFColorComponent, 3>;
@@ -211,13 +219,17 @@ public:
virtual QColor getDefaultColor() const = 0;
virtual QColor getColor(const PDFColor& color) const = 0;
virtual size_t getColorComponentCount() const = 0;
virtual QImage getImage(const PDFImageData& imageData) const;
virtual QImage getImage(const PDFImageData& imageData, const PDFImageData& softMask) const;
virtual const PDFPatternColorSpace* asPatternColorSpace() const { return nullptr; }
/// 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;
/// Creates alpha mask from soft image data. Exception is thrown, if something fails.
/// \param softMask Soft mask
static QImage createAlphaMask(const PDFImageData& softMask);
/// 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
@@ -496,7 +508,7 @@ public:
virtual QColor getDefaultColor() const override;
virtual QColor getColor(const PDFColor& color) const override;
virtual size_t getColorComponentCount() const override;
virtual QImage getImage(const PDFImageData& imageData) const override;
virtual QImage getImage(const PDFImageData& imageData, const PDFImageData& softMask) const override;
/// Creates indexed color space from provided values.
/// \param colorSpaceDictionary Color space dictionary