mirror of https://github.com/JakubMelka/PDF4QT.git
919 lines
36 KiB
C++
919 lines
36 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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#include "pdfcolorspaces.h"
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#include "pdfobject.h"
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#include "pdfdocument.h"
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#include "pdfexception.h"
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#include "pdfutils.h"
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namespace pdf
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{
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QColor PDFDeviceGrayColorSpace::getDefaultColor() const
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{
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return QColor(Qt::black);
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}
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QColor PDFDeviceGrayColorSpace::getColor(const PDFColor& color) const
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{
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Q_ASSERT(color.size() == getColorComponentCount());
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PDFColorComponent component = clip01(color[0]);
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QColor result(QColor::Rgb);
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result.setRgbF(component, component, component, 1.0);
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return result;
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}
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size_t PDFDeviceGrayColorSpace::getColorComponentCount() const
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{
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return 1;
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}
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QColor PDFDeviceRGBColorSpace::getDefaultColor() const
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{
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return QColor(Qt::black);
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}
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QColor PDFDeviceRGBColorSpace::getColor(const PDFColor& color) const
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{
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Q_ASSERT(color.size() == getColorComponentCount());
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return fromRGB01({ color[0], color[1], color[2] });
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}
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size_t PDFDeviceRGBColorSpace::getColorComponentCount() const
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{
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return 3;
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}
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QColor PDFDeviceCMYKColorSpace::getDefaultColor() const
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{
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return QColor(Qt::black);
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}
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QColor PDFDeviceCMYKColorSpace::getColor(const PDFColor& color) const
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{
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Q_ASSERT(color.size() == getColorComponentCount());
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PDFColorComponent c = clip01(color[0]);
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PDFColorComponent m = clip01(color[1]);
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PDFColorComponent y = clip01(color[2]);
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PDFColorComponent k = clip01(color[3]);
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QColor result(QColor::Cmyk);
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result.setCmykF(c, m, y, k, 1.0);
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return result;
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}
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size_t PDFDeviceCMYKColorSpace::getColorComponentCount() const
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{
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return 4;
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}
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QImage PDFAbstractColorSpace::getImage(const PDFImageData& imageData) const
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{
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if (imageData.isValid())
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{
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switch (imageData.getMaskingType())
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{
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case PDFImageData::MaskingType::None:
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{
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QImage image(imageData.getWidth(), imageData.getHeight(), QImage::Format_RGB888);
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image.fill(QColor(Qt::white));
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unsigned int componentCount = imageData.getComponents();
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if (componentCount != getColorComponentCount())
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{
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throw PDFParserException(PDFTranslationContext::tr("Invalid colors for color space. Color space has %1 colors. Provided color count is %4.").arg(getColorComponentCount()).arg(componentCount));
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}
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const std::vector<PDFReal>& decode = imageData.getDecode();
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if (!decode.empty() && decode.size() != componentCount * 2)
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{
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throw PDFParserException(PDFTranslationContext::tr("Invalid size of the decoded array. Expected %1, actual %2.").arg(componentCount * 2).arg(decode.size()));
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}
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QDataStream stream(const_cast<QByteArray*>(&imageData.getData()), QIODevice::ReadOnly);
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PDFBitReader reader(&stream, imageData.getBitsPerComponent());
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PDFColor color;
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color.resize(componentCount);
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const double max = reader.max();
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const double coefficient = 1.0 / max;
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for (unsigned int i = 0, rowCount = imageData.getHeight(); i < rowCount; ++i)
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{
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reader.seek(i * imageData.getStride());
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unsigned char* outputLine = image.scanLine(i);
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for (unsigned int j = 0; j < imageData.getWidth(); ++j)
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{
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for (unsigned int k = 0; k < componentCount; ++k)
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{
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PDFReal value = reader.read();
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// Interpolate value, if it is not empty
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if (!decode.empty())
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{
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color[k] = interpolate(value, 0.0, max, decode[2 * k], decode[2 * k + 1]);
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}
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else
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{
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color[k] = value * coefficient;
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}
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}
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QColor transformedColor = getColor(color);
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QRgb rgb = transformedColor.rgb();
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*outputLine++ = qRed(rgb);
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*outputLine++ = qGreen(rgb);
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*outputLine++ = qBlue(rgb);
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}
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}
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return image;
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}
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case PDFImageData::MaskingType::ColorKeyMasking:
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{
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QImage image(imageData.getWidth(), imageData.getHeight(), QImage::Format_RGBA8888);
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image.fill(QColor(Qt::transparent));
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unsigned int componentCount = imageData.getComponents();
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if (componentCount != getColorComponentCount())
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{
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throw PDFParserException(PDFTranslationContext::tr("Invalid colors for color space. Color space has %1 colors. Provided color count is %4.").arg(getColorComponentCount()).arg(componentCount));
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}
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Q_ASSERT(componentCount > 0);
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const std::vector<PDFInteger>& colorKeyMask = imageData.getColorKeyMask();
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if (colorKeyMask.size() / 2 != componentCount)
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{
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throw PDFParserException(PDFTranslationContext::tr("Invalid number of color components in color key mask. Expected %1, provided %2.").arg(2 * componentCount).arg(colorKeyMask.size()));
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}
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const std::vector<PDFReal>& decode = imageData.getDecode();
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if (!decode.empty() && decode.size() != componentCount * 2)
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{
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throw PDFParserException(PDFTranslationContext::tr("Invalid size of the decoded array. Expected %1, actual %2.").arg(componentCount * 2).arg(decode.size()));
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}
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QDataStream stream(const_cast<QByteArray*>(&imageData.getData()), QIODevice::ReadOnly);
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PDFBitReader reader(&stream, imageData.getBitsPerComponent());
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PDFColor color;
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color.resize(componentCount);
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const double max = reader.max();
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const double coefficient = 1.0 / max;
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for (unsigned int i = 0, rowCount = imageData.getHeight(); i < rowCount; ++i)
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{
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reader.seek(i * imageData.getStride());
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unsigned char* outputLine = image.scanLine(i);
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for (unsigned int j = 0; j < imageData.getWidth(); ++j)
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{
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// Number of masked-out colors
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unsigned int maskedColors = 0;
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for (unsigned int k = 0; k < componentCount; ++k)
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{
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PDFBitReader::Value value = reader.read();
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// Interpolate value, if it is not empty
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if (!decode.empty())
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{
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color[k] = interpolate(value, 0.0, max, decode[2 * k], decode[2 * k + 1]);
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}
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else
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{
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color[k] = value * coefficient;
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}
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Q_ASSERT(2 * k + 1 < colorKeyMask.size());
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if (static_cast<std::decay<decltype(colorKeyMask)>::type::value_type>(value) >= colorKeyMask[2 * k] &&
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static_cast<std::decay<decltype(colorKeyMask)>::type::value_type>(value) <= colorKeyMask[2 * k + 1])
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{
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++maskedColors;
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}
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}
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QColor transformedColor = getColor(color);
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QRgb rgb = transformedColor.rgb();
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*outputLine++ = qRed(rgb);
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*outputLine++ = qGreen(rgb);
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*outputLine++ = qBlue(rgb);
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*outputLine++ = (maskedColors == componentCount) ? 0x00 : 0xFF;
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}
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}
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return image;
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}
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default:
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{
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throw PDFRendererException(RenderErrorType::NotImplemented, PDFTranslationContext::tr("Image masking not implemented!"));
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}
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}
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}
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return QImage();
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}
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PDFColorSpacePointer PDFAbstractColorSpace::createColorSpace(const PDFDictionary* colorSpaceDictionary,
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const PDFDocument* document,
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const PDFObject& colorSpace)
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{
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return createColorSpaceImpl(colorSpaceDictionary, document, colorSpace, COLOR_SPACE_MAX_LEVEL_OF_RECURSION);
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}
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PDFColorSpacePointer PDFAbstractColorSpace::createDeviceColorSpaceByName(const PDFDictionary* colorSpaceDictionary,
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const PDFDocument* document,
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const QByteArray& name)
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{
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return createDeviceColorSpaceByNameImpl(colorSpaceDictionary, document, name, COLOR_SPACE_MAX_LEVEL_OF_RECURSION);
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}
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PDFColorSpacePointer PDFAbstractColorSpace::createColorSpaceImpl(const PDFDictionary* colorSpaceDictionary,
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const PDFDocument* document,
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const PDFObject& colorSpace,
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int recursion)
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{
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if (--recursion <= 0)
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{
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throw PDFParserException(PDFTranslationContext::tr("Can't load color space, because color space structure is too complex."));
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}
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if (colorSpace.isName())
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{
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return createDeviceColorSpaceByNameImpl(colorSpaceDictionary, document, colorSpace.getString(), recursion);
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}
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else if (colorSpace.isArray())
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{
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// First value of the array should be identification name, second value dictionary with parameters
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const PDFArray* array = colorSpace.getArray();
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size_t count = array->getCount();
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if (count > 0)
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{
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// Name of the color space
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const PDFObject& colorSpaceIdentifier = document->getObject(array->getItem(0));
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if (colorSpaceIdentifier.isName())
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{
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QByteArray name = colorSpaceIdentifier.getString();
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const PDFDictionary* dictionary = nullptr;
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const PDFStream* stream = nullptr;
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if (count > 1)
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{
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const PDFObject& colorSpaceSettings = document->getObject(array->getItem(1));
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if (colorSpaceSettings.isDictionary())
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{
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dictionary = colorSpaceSettings.getDictionary();
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}
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if (colorSpaceSettings.isStream())
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{
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stream = colorSpaceSettings.getStream();
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}
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}
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if (dictionary)
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{
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if (name == COLOR_SPACE_NAME_CAL_GRAY)
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{
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return PDFCalGrayColorSpace::createCalGrayColorSpace(document, dictionary);
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}
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else if (name == COLOR_SPACE_NAME_CAL_RGB)
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{
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return PDFCalRGBColorSpace::createCalRGBColorSpace(document, dictionary);
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}
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else if (name == COLOR_SPACE_NAME_LAB)
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{
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return PDFLabColorSpace::createLabColorSpace(document, dictionary);
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}
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}
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if (stream && name == COLOR_SPACE_NAME_ICCBASED)
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{
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return PDFICCBasedColorSpace::createICCBasedColorSpace(colorSpaceDictionary, document, stream, recursion);
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}
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if (name == COLOR_SPACE_NAME_INDEXED && count == 4)
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{
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return PDFIndexedColorSpace::createIndexedColorSpace(colorSpaceDictionary, document, array, recursion);
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}
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if (name == COLOR_SPACE_NAME_SEPARATION && count == 4)
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{
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return PDFSeparationColorSpace::createSeparationColorSpace(colorSpaceDictionary, document, array, recursion);
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}
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// Try to just load by standard way - we can have "standard" color space stored in array
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return createColorSpaceImpl(colorSpaceDictionary, document, colorSpaceIdentifier, recursion);
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}
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}
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}
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throw PDFParserException(PDFTranslationContext::tr("Invalid color space."));
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return PDFColorSpacePointer();
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}
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PDFColorSpacePointer PDFAbstractColorSpace::createDeviceColorSpaceByNameImpl(const PDFDictionary* colorSpaceDictionary,
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const PDFDocument* document,
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const QByteArray& name,
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int recursion)
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{
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if (--recursion <= 0)
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{
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throw PDFParserException(PDFTranslationContext::tr("Can't load color space, because color space structure is too complex."));
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}
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if (name == COLOR_SPACE_NAME_DEVICE_GRAY || name == COLOR_SPACE_NAME_ABBREVIATION_DEVICE_GRAY)
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{
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if (colorSpaceDictionary && colorSpaceDictionary->hasKey(COLOR_SPACE_NAME_DEFAULT_GRAY))
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{
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return createColorSpaceImpl(colorSpaceDictionary, document, document->getObject(colorSpaceDictionary->get(COLOR_SPACE_NAME_DEFAULT_GRAY)), recursion);
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}
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else
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{
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return PDFColorSpacePointer(new PDFDeviceGrayColorSpace());
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}
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}
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else if (name == COLOR_SPACE_NAME_DEVICE_RGB || name == COLOR_SPACE_NAME_ABBREVIATION_DEVICE_RGB)
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{
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if (colorSpaceDictionary && colorSpaceDictionary->hasKey(COLOR_SPACE_NAME_DEFAULT_RGB))
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{
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return createColorSpaceImpl(colorSpaceDictionary, document, document->getObject(colorSpaceDictionary->get(COLOR_SPACE_NAME_DEFAULT_RGB)), recursion);
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}
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else
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{
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return PDFColorSpacePointer(new PDFDeviceRGBColorSpace());
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}
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}
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else if (name == COLOR_SPACE_NAME_DEVICE_CMYK || name == COLOR_SPACE_NAME_ABBREVIATION_DEVICE_CMYK)
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{
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if (colorSpaceDictionary && colorSpaceDictionary->hasKey(COLOR_SPACE_NAME_DEFAULT_CMYK))
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{
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return createColorSpaceImpl(colorSpaceDictionary, document, document->getObject(colorSpaceDictionary->get(COLOR_SPACE_NAME_DEFAULT_CMYK)), recursion);
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}
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else
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{
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return PDFColorSpacePointer(new PDFDeviceCMYKColorSpace());
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}
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}
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else if (colorSpaceDictionary && colorSpaceDictionary->hasKey(name))
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{
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return createColorSpaceImpl(colorSpaceDictionary, document, document->getObject(colorSpaceDictionary->get(name)), recursion);
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}
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throw PDFParserException(PDFTranslationContext::tr("Invalid color space."));
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return PDFColorSpacePointer();
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}
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/// Conversion matrix from XYZ space to RGB space. Values are taken from this article:
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/// https://en.wikipedia.org/wiki/SRGB#The_sRGB_transfer_function_.28.22gamma.22.29
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static constexpr const PDFColorComponentMatrix<3, 3> matrixXYZtoRGB(
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3.2406f, -1.5372f, -0.4986f,
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-0.9689f, 1.8758f, 0.0415f,
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0.0557f, -0.2040f, 1.0570f
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);
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PDFColor3 PDFAbstractColorSpace::convertXYZtoRGB(const PDFColor3& xyzColor)
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{
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return matrixXYZtoRGB * xyzColor;
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}
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QColor PDFXYZColorSpace::getDefaultColor() const
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{
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PDFColor color;
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const size_t componentCount = getColorComponentCount();
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for (size_t i = 0; i < componentCount; ++i)
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{
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color.push_back(0.0f);
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}
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return getColor(color);
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}
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PDFXYZColorSpace::PDFXYZColorSpace(PDFColor3 whitePoint) :
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m_whitePoint(whitePoint),
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m_correctionCoefficients()
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{
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PDFColor3 mappedWhitePoint = convertXYZtoRGB(m_whitePoint);
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m_correctionCoefficients[0] = 1.0f / mappedWhitePoint[0];
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m_correctionCoefficients[1] = 1.0f / mappedWhitePoint[1];
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m_correctionCoefficients[2] = 1.0f / mappedWhitePoint[2];
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}
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PDFCalGrayColorSpace::PDFCalGrayColorSpace(PDFColor3 whitePoint, PDFColor3 blackPoint, PDFColorComponent gamma) :
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PDFXYZColorSpace(whitePoint),
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m_blackPoint(blackPoint),
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m_gamma(gamma)
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{
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}
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QColor PDFCalGrayColorSpace::getColor(const PDFColor& color) const
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{
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Q_ASSERT(color.size() == getColorComponentCount());
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const PDFColorComponent A = clip01(color[0]);
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const PDFColorComponent xyzColor = std::powf(A, m_gamma);
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const PDFColor3 xyzColorMultipliedByWhitePoint = colorMultiplyByFactor(m_whitePoint, xyzColor);
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const PDFColor3 rgb = convertXYZtoRGB(xyzColorMultipliedByWhitePoint);
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const PDFColor3 calibratedRGB = colorMultiplyByFactors(rgb, m_correctionCoefficients);
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return fromRGB01(calibratedRGB);
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}
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size_t PDFCalGrayColorSpace::getColorComponentCount() const
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{
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return 1;
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}
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PDFColorSpacePointer PDFCalGrayColorSpace::createCalGrayColorSpace(const PDFDocument* document, const PDFDictionary* dictionary)
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{
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// Standard D65 white point
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PDFColor3 whitePoint = { 0.9505f, 1.0000f, 1.0890f };
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PDFColor3 blackPoint = { 0, 0, 0 };
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PDFColorComponent gamma = 1.0f;
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PDFDocumentDataLoaderDecorator loader(document);
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loader.readNumberArrayFromDictionary(dictionary, CAL_WHITE_POINT, whitePoint.begin(), whitePoint.end());
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loader.readNumberArrayFromDictionary(dictionary, CAL_BLACK_POINT, blackPoint.begin(), blackPoint.end());
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gamma = loader.readNumberFromDictionary(dictionary, CAL_GAMMA, gamma);
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return PDFColorSpacePointer(new PDFCalGrayColorSpace(whitePoint, blackPoint, gamma));
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}
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PDFCalRGBColorSpace::PDFCalRGBColorSpace(PDFColor3 whitePoint, PDFColor3 blackPoint, PDFColor3 gamma, PDFColorComponentMatrix_3x3 matrix) :
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PDFXYZColorSpace(whitePoint),
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m_blackPoint(blackPoint),
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m_gamma(gamma),
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m_matrix(matrix)
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{
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}
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QColor PDFCalRGBColorSpace::getColor(const PDFColor& color) const
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{
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Q_ASSERT(color.size() == getColorComponentCount());
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const PDFColor3 ABC = clip01(PDFColor3{ color[0], color[1], color[2] });
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const PDFColor3 ABCwithGamma = colorPowerByFactors(ABC, m_gamma);
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const PDFColor3 XYZ = m_matrix * ABCwithGamma;
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const PDFColor3 rgb = convertXYZtoRGB(XYZ);
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const PDFColor3 calibratedRGB = colorMultiplyByFactors(rgb, m_correctionCoefficients);
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return fromRGB01(calibratedRGB);
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}
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size_t PDFCalRGBColorSpace::getColorComponentCount() const
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{
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return 3;
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}
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PDFColorSpacePointer PDFCalRGBColorSpace::createCalRGBColorSpace(const PDFDocument* document, const PDFDictionary* dictionary)
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{
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// Standard D65 white point
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PDFColor3 whitePoint = { 0.9505f, 1.0000f, 1.0890f };
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PDFColor3 blackPoint = { 0, 0, 0 };
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PDFColor3 gamma = { 1.0f, 1.0f, 1.0f };
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PDFColorComponentMatrix_3x3 matrix( 1, 0, 0,
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0, 1, 0,
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0, 0, 1 );
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PDFDocumentDataLoaderDecorator loader(document);
|
|
loader.readNumberArrayFromDictionary(dictionary, CAL_WHITE_POINT, whitePoint.begin(), whitePoint.end());
|
|
loader.readNumberArrayFromDictionary(dictionary, CAL_BLACK_POINT, blackPoint.begin(), blackPoint.end());
|
|
loader.readNumberArrayFromDictionary(dictionary, CAL_GAMMA, gamma.begin(), gamma.end());
|
|
loader.readNumberArrayFromDictionary(dictionary, CAL_MATRIX, matrix.begin(), matrix.end());
|
|
|
|
return PDFColorSpacePointer(new PDFCalRGBColorSpace(whitePoint, blackPoint, gamma, matrix));
|
|
}
|
|
|
|
PDFLabColorSpace::PDFLabColorSpace(PDFColor3 whitePoint,
|
|
PDFColor3 blackPoint,
|
|
PDFColorComponent aMin,
|
|
PDFColorComponent aMax,
|
|
PDFColorComponent bMin,
|
|
PDFColorComponent bMax) :
|
|
PDFXYZColorSpace(whitePoint),
|
|
m_blackPoint(blackPoint),
|
|
m_aMin(aMin),
|
|
m_aMax(aMax),
|
|
m_bMin(bMin),
|
|
m_bMax(bMax)
|
|
{
|
|
|
|
}
|
|
|
|
QColor PDFLabColorSpace::getColor(const PDFColor& color) const
|
|
{
|
|
Q_ASSERT(color.size() == getColorComponentCount());
|
|
|
|
const PDFColorComponent LStar = qBound(0.0f, color[0], 100.0f);
|
|
const PDFColorComponent aStar = qBound(m_aMin, color[1], m_aMax);
|
|
const PDFColorComponent bStar = qBound(m_bMin, color[2], m_bMax);
|
|
|
|
const PDFColorComponent param1 = (LStar + 16.0f) / 116.0f;
|
|
const PDFColorComponent param2 = aStar / 500.0f;
|
|
const PDFColorComponent param3 = bStar / 200.0f;
|
|
|
|
const PDFColorComponent L = param1 + param2;
|
|
const PDFColorComponent M = param1;
|
|
const PDFColorComponent N = param1 - param3;
|
|
|
|
auto g = [](PDFColorComponent x) -> PDFColorComponent
|
|
{
|
|
if (x >= 6.0f / 29.0f)
|
|
{
|
|
return x * x * x;
|
|
}
|
|
else
|
|
{
|
|
return (108.0f / 841.0f) * (x - 4.0f / 29.0f);
|
|
}
|
|
};
|
|
|
|
const PDFColorComponent gL = g(L);
|
|
const PDFColorComponent gM = g(M);
|
|
const PDFColorComponent gN = g(N);
|
|
const PDFColor3 gLMN = { gL, gM, gN };
|
|
|
|
const PDFColor3 XYZ = colorMultiplyByFactors(m_whitePoint, gLMN);
|
|
const PDFColor3 rgb = convertXYZtoRGB(XYZ);
|
|
const PDFColor3 calibratedRGB = colorMultiplyByFactors(rgb, m_correctionCoefficients);
|
|
return fromRGB01(calibratedRGB);
|
|
}
|
|
|
|
size_t PDFLabColorSpace::getColorComponentCount() const
|
|
{
|
|
return 3;
|
|
}
|
|
|
|
PDFColorSpacePointer PDFLabColorSpace::createLabColorSpace(const PDFDocument* document, const PDFDictionary* dictionary)
|
|
{
|
|
// Standard D65 white point
|
|
PDFColor3 whitePoint = { 0.9505f, 1.0000f, 1.0890f };
|
|
PDFColor3 blackPoint = { 0, 0, 0 };
|
|
|
|
static_assert(std::numeric_limits<PDFColorComponent>::has_infinity, "Fix this code!");
|
|
const PDFColorComponent infPos = std::numeric_limits<PDFColorComponent>::infinity();
|
|
const PDFColorComponent infNeg = -std::numeric_limits<PDFColorComponent>::infinity();
|
|
std::array<PDFColorComponent, 4> minMax = { infNeg, infPos, infNeg, infPos };
|
|
|
|
PDFDocumentDataLoaderDecorator loader(document);
|
|
loader.readNumberArrayFromDictionary(dictionary, CAL_WHITE_POINT, whitePoint.begin(), whitePoint.end());
|
|
loader.readNumberArrayFromDictionary(dictionary, CAL_BLACK_POINT, blackPoint.begin(), blackPoint.end());
|
|
loader.readNumberArrayFromDictionary(dictionary, CAL_RANGE, minMax.begin(), minMax.end());
|
|
|
|
return PDFColorSpacePointer(new PDFLabColorSpace(whitePoint, blackPoint, minMax[0], minMax[1], minMax[2], minMax[3]));
|
|
}
|
|
|
|
PDFICCBasedColorSpace::PDFICCBasedColorSpace(PDFColorSpacePointer alternateColorSpace, Ranges range) :
|
|
m_alternateColorSpace(qMove(alternateColorSpace)),
|
|
m_range(range)
|
|
{
|
|
|
|
}
|
|
|
|
QColor PDFICCBasedColorSpace::getDefaultColor() const
|
|
{
|
|
PDFColor color;
|
|
const size_t componentCount = getColorComponentCount();
|
|
for (size_t i = 0; i < componentCount; ++i)
|
|
{
|
|
color.push_back(0.0f);
|
|
}
|
|
return getColor(color);
|
|
}
|
|
|
|
QColor PDFICCBasedColorSpace::getColor(const PDFColor& color) const
|
|
{
|
|
Q_ASSERT(color.size() == getColorComponentCount());
|
|
|
|
size_t colorComponentCount = getColorComponentCount();
|
|
|
|
// Clip color values by range
|
|
PDFColor clippedColor = color;
|
|
for (size_t i = 0; i < colorComponentCount; ++i)
|
|
{
|
|
const size_t imin = 2 * i + 0;
|
|
const size_t imax = 2 * i + 1;
|
|
clippedColor[i] = qBound(m_range[imin], clippedColor[i], m_range[imax]);
|
|
}
|
|
|
|
return m_alternateColorSpace->getColor(clippedColor);
|
|
}
|
|
|
|
size_t PDFICCBasedColorSpace::getColorComponentCount() const
|
|
{
|
|
return m_alternateColorSpace->getColorComponentCount();
|
|
}
|
|
|
|
PDFColorSpacePointer PDFICCBasedColorSpace::createICCBasedColorSpace(const PDFDictionary* colorSpaceDictionary,
|
|
const PDFDocument* document,
|
|
const PDFStream* stream,
|
|
int recursion)
|
|
{
|
|
// First, try to load alternate color space, if it is present
|
|
const PDFDictionary* dictionary = stream->getDictionary();
|
|
|
|
PDFDocumentDataLoaderDecorator loader(document);
|
|
PDFColorSpacePointer alternateColorSpace;
|
|
if (dictionary->hasKey(ICCBASED_ALTERNATE))
|
|
{
|
|
alternateColorSpace = PDFAbstractColorSpace::createColorSpaceImpl(colorSpaceDictionary, document, document->getObject(dictionary->get(ICCBASED_ALTERNATE)), recursion);
|
|
}
|
|
else
|
|
{
|
|
// Determine color space from parameter N, which determines number of components
|
|
const PDFInteger N = loader.readIntegerFromDictionary(dictionary, ICCBASED_N, 0);
|
|
|
|
switch (N)
|
|
{
|
|
case 1:
|
|
{
|
|
alternateColorSpace = PDFAbstractColorSpace::createColorSpaceImpl(colorSpaceDictionary, document, PDFObject::createName(std::make_shared<PDFString>(std::move(QByteArray(COLOR_SPACE_NAME_DEVICE_GRAY)))), recursion);
|
|
break;
|
|
}
|
|
|
|
case 3:
|
|
{
|
|
alternateColorSpace = PDFAbstractColorSpace::createColorSpaceImpl(colorSpaceDictionary, document, PDFObject::createName(std::make_shared<PDFString>(std::move(QByteArray(COLOR_SPACE_NAME_DEVICE_RGB)))), recursion);
|
|
break;
|
|
}
|
|
|
|
case 4:
|
|
{
|
|
alternateColorSpace = PDFAbstractColorSpace::createColorSpaceImpl(colorSpaceDictionary, document, PDFObject::createName(std::make_shared<PDFString>(std::move(QByteArray(COLOR_SPACE_NAME_DEVICE_CMYK)))), recursion);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Can't determine alternate color space for ICC based profile. Number of components is %1.").arg(N));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!alternateColorSpace)
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Can't determine alternate color space for ICC based profile."));
|
|
}
|
|
|
|
Ranges ranges = { 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f };
|
|
static_assert(ranges.size() == 8, "Fix initialization above!");
|
|
|
|
const size_t components = alternateColorSpace->getColorComponentCount();
|
|
const size_t rangeSize = 2 * components;
|
|
|
|
if (rangeSize > ranges.size())
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Too much color components for ICC based profile."));
|
|
}
|
|
|
|
auto itStart = ranges.begin();
|
|
auto itEnd = std::next(itStart, rangeSize);
|
|
loader.readNumberArrayFromDictionary(dictionary, ICCBASED_RANGE, itStart, itEnd);
|
|
|
|
return PDFColorSpacePointer(new PDFICCBasedColorSpace(qMove(alternateColorSpace), ranges));
|
|
}
|
|
|
|
PDFIndexedColorSpace::PDFIndexedColorSpace(PDFColorSpacePointer baseColorSpace, QByteArray&& colors, int maxValue) :
|
|
m_baseColorSpace(qMove(baseColorSpace)),
|
|
m_colors(qMove(colors)),
|
|
m_maxValue(maxValue)
|
|
{
|
|
|
|
}
|
|
|
|
QColor PDFIndexedColorSpace::getDefaultColor() const
|
|
{
|
|
return getColor(PDFColor(0.0f));
|
|
}
|
|
|
|
QColor PDFIndexedColorSpace::getColor(const PDFColor& color) const
|
|
{
|
|
// Indexed color space value must have exactly one component!
|
|
Q_ASSERT(color.size() == 1);
|
|
|
|
const int colorIndex = qBound(MIN_VALUE, static_cast<int>(color[0]), m_maxValue);
|
|
const int componentCount = static_cast<int>(m_baseColorSpace->getColorComponentCount());
|
|
const int byteOffset = colorIndex * componentCount;
|
|
|
|
// We must point into the array. Check first and last component.
|
|
Q_ASSERT(byteOffset + componentCount - 1 < m_colors.size());
|
|
|
|
PDFColor decodedColor;
|
|
const char* bytePointer = m_colors.constData() + byteOffset;
|
|
|
|
for (int i = 0; i < componentCount; ++i)
|
|
{
|
|
const unsigned char value = *bytePointer++;
|
|
const PDFColorComponent component = static_cast<PDFColorComponent>(value) / 255.0f;
|
|
decodedColor.push_back(component);
|
|
}
|
|
|
|
return m_baseColorSpace->getColor(decodedColor);
|
|
}
|
|
|
|
size_t PDFIndexedColorSpace::getColorComponentCount() const
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
QImage PDFIndexedColorSpace::getImage(const PDFImageData& imageData) const
|
|
{
|
|
if (imageData.isValid())
|
|
{
|
|
QImage image(imageData.getWidth(), imageData.getHeight(), QImage::Format_RGB888);
|
|
image.fill(QColor(Qt::white));
|
|
|
|
unsigned int componentCount = imageData.getComponents();
|
|
QDataStream stream(const_cast<QByteArray*>(&imageData.getData()), QIODevice::ReadOnly);
|
|
PDFBitReader reader(&stream, imageData.getBitsPerComponent());
|
|
|
|
if (componentCount != getColorComponentCount())
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Invalid colors for indexed color space. Color space has %1 colors. Provided color count is %4.").arg(getColorComponentCount()).arg(componentCount));
|
|
}
|
|
|
|
Q_ASSERT(componentCount == 1);
|
|
|
|
PDFColor color;
|
|
color.resize(1);
|
|
|
|
for (unsigned int i = 0, rowCount = imageData.getHeight(); i < rowCount; ++i)
|
|
{
|
|
reader.seek(i * imageData.getStride());
|
|
unsigned char* outputLine = image.scanLine(i);
|
|
|
|
for (unsigned int j = 0; j < imageData.getWidth(); ++j)
|
|
{
|
|
PDFBitReader::Value index = reader.read();
|
|
color[0] = index;
|
|
|
|
QColor transformedColor = getColor(color);
|
|
QRgb rgb = transformedColor.rgb();
|
|
|
|
*outputLine++ = qRed(rgb);
|
|
*outputLine++ = qGreen(rgb);
|
|
*outputLine++ = qBlue(rgb);
|
|
}
|
|
}
|
|
|
|
return image;
|
|
}
|
|
|
|
return QImage();
|
|
}
|
|
|
|
PDFColorSpacePointer PDFIndexedColorSpace::createIndexedColorSpace(const PDFDictionary* colorSpaceDictionary,
|
|
const PDFDocument* document,
|
|
const PDFArray* array,
|
|
int recursion)
|
|
{
|
|
Q_ASSERT(array->getCount() == 4);
|
|
|
|
// Read base color space
|
|
PDFColorSpacePointer baseColorSpace = PDFAbstractColorSpace::createColorSpaceImpl(colorSpaceDictionary, document, document->getObject(array->getItem(1)), recursion);
|
|
|
|
if (!baseColorSpace)
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Can't determine base color space for indexed color space."));
|
|
}
|
|
|
|
// Read maximum value
|
|
PDFDocumentDataLoaderDecorator loader(document);
|
|
const int maxValue = qBound<int>(MIN_VALUE, loader.readInteger(array->getItem(2), 0), MAX_VALUE);
|
|
|
|
// Read stream/byte string with corresponding color values
|
|
QByteArray colors;
|
|
const PDFObject& colorDataObject = document->getObject(array->getItem(3));
|
|
|
|
if (colorDataObject.isString())
|
|
{
|
|
colors = colorDataObject.getString();
|
|
}
|
|
else if (colorDataObject.isStream())
|
|
{
|
|
colors = document->getDecodedStream(colorDataObject.getStream());
|
|
}
|
|
|
|
// Check, if we have enough colors
|
|
const int colorCount = maxValue - MIN_VALUE + 1;
|
|
const int componentCount = static_cast<int>(baseColorSpace->getColorComponentCount());
|
|
const int byteCount = colorCount * componentCount;
|
|
if (byteCount != colors.size())
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Invalid colors for indexed color space. Color space has %1 colors, %2 color components and must have %3 size. Provided size is %4.").arg(colorCount).arg(componentCount).arg(byteCount).arg(colors.size()));
|
|
}
|
|
|
|
return PDFColorSpacePointer(new PDFIndexedColorSpace(qMove(baseColorSpace), qMove(colors), maxValue));
|
|
}
|
|
|
|
PDFSeparationColorSpace::PDFSeparationColorSpace(QByteArray&& colorName, PDFColorSpacePointer alternateColorSpace, PDFFunctionPtr tintTransform) :
|
|
m_colorName(qMove(colorName)),
|
|
m_alternateColorSpace(qMove(alternateColorSpace)),
|
|
m_tintTransform(qMove(tintTransform))
|
|
{
|
|
|
|
}
|
|
|
|
QColor PDFSeparationColorSpace::getDefaultColor() const
|
|
{
|
|
return getColor(PDFColor(0.0f));
|
|
}
|
|
|
|
QColor PDFSeparationColorSpace::getColor(const PDFColor& color) const
|
|
{
|
|
// Separation color space value must have exactly one component!
|
|
Q_ASSERT(color.size() == 1);
|
|
|
|
// Input value
|
|
double tint = color.back();
|
|
|
|
// Output values
|
|
std::vector<double> outputColor;
|
|
outputColor.resize(m_alternateColorSpace->getColorComponentCount(), 0.0);
|
|
PDFFunction::FunctionResult result = m_tintTransform->apply(&tint, &tint + 1, outputColor.data(), outputColor.data() + outputColor.size());
|
|
|
|
if (result)
|
|
{
|
|
PDFColor color;
|
|
std::for_each(outputColor.cbegin(), outputColor.cend(), [&color](double value) { color.push_back(static_cast<float>(value)); });
|
|
return m_alternateColorSpace->getColor(color);
|
|
}
|
|
else
|
|
{
|
|
// Return invalid color
|
|
return QColor();
|
|
}
|
|
}
|
|
|
|
size_t PDFSeparationColorSpace::getColorComponentCount() const
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
PDFColorSpacePointer PDFSeparationColorSpace::createSeparationColorSpace(const PDFDictionary* colorSpaceDictionary,
|
|
const PDFDocument* document,
|
|
const PDFArray* array,
|
|
int recursion)
|
|
{
|
|
Q_ASSERT(array->getCount() == 4);
|
|
|
|
// Read color name
|
|
const PDFObject& colorNameObject = document->getObject(array->getItem(1));
|
|
if (!colorNameObject.isName())
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Can't determine color name for separation color space."));
|
|
}
|
|
QByteArray colorName = colorNameObject.getString();
|
|
|
|
// Read alternate color space
|
|
PDFColorSpacePointer alternateColorSpace = PDFAbstractColorSpace::createColorSpaceImpl(colorSpaceDictionary, document, document->getObject(array->getItem(2)), recursion);
|
|
if (!alternateColorSpace)
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Can't determine alternate color space for separation color space."));
|
|
}
|
|
|
|
PDFFunctionPtr tintTransform = PDFFunction::createFunction(document, array->getItem(3));
|
|
if (!tintTransform)
|
|
{
|
|
throw PDFParserException(PDFTranslationContext::tr("Can't determine tint transform for separation color space."));
|
|
}
|
|
|
|
return PDFColorSpacePointer(new PDFSeparationColorSpace(qMove(colorName), qMove(alternateColorSpace), qMove(tintTransform)));
|
|
}
|
|
|
|
const unsigned char* PDFImageData::getRow(unsigned int rowIndex) const
|
|
{
|
|
const unsigned char* data = reinterpret_cast<const unsigned char*>(m_data.constData());
|
|
|
|
Q_ASSERT(rowIndex < m_height);
|
|
return data + (rowIndex * m_stride);
|
|
}
|
|
|
|
} // namespace pdf
|