mirror of
https://invent.kde.org/frameworks/kimageformats.git
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7899c27a80
- Added support for writing EXR files - Large image support (tested with 32GiB 16-bit image) - OpenEXR multithreaded read/write support through the use of line blocks - Build option to enable conversion to sRGB when read (disabled by default) - Multi-view image reading support - Options support: Size, ImageFormat, Quality, CompressRatio - Metadata write/read support via EXR attributes The plugin is now quite complete. It should also work on KF5 (not tested): if there is the will to include this MR also on KF5, let me know and I will do all the necessary tests.
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
/*
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SPDX-FileCopyrightText: 2023 Mirco Miranda <mircomir@outlook.com>
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SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#ifndef SCANLINECONVERTER_P_H
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#define SCANLINECONVERTER_P_H
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#include <QColorSpace>
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#include <QImage>
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/*!
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* \brief The scanlineFormatConversion class
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* A class to convert an image scan line. It introduces some overhead on small images
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* but performs better on large images. :)
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*/
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class ScanLineConverter
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{
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public:
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ScanLineConverter(const QImage::Format &targetFormat);
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ScanLineConverter(const ScanLineConverter &other);
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ScanLineConverter &operator=(const ScanLineConverter &other);
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/*!
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* \brief targetFormat
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* \return The target format set in the constructor.
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*/
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QImage::Format targetFormat() const;
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/*!
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* \brief setTargetColorSpace
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* Set the colorspace conversion.
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*
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* In addition to format conversion, it is also possible to convert the color
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* space if the source image has a different one set.
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* The conversion is done on the source format if and only if the image
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* has a color depth greater than 24 bit and the color profile set is different
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* from that of the image itself.
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* \param colorSpace
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*/
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void setTargetColorSpace(const QColorSpace &colorSpace);
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QColorSpace targetColorSpace() const;
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/*!
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* \brief setDefaultSourceColorSpace
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* Set the source color space to use when the image does not have a color space.
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* \param colorSpace
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*/
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void setDefaultSourceColorSpace(const QColorSpace &colorSpace);
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QColorSpace defaultSourceColorSpace() const;
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/*!
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* \brief convertedScanLine
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* Convert the scanline \a y.
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* \note If the image format (and color space) is the same of converted format, it returns the image scan line.
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* \return The scan line converted.
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*/
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const uchar *convertedScanLine(const QImage &image, qint32 y);
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/*!
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* \brief bytesPerLine
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* \return The size of the last converted scanline.
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*/
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qsizetype bytesPerLine() const;
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/*!
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* \brief isColorSpaceConversionNeeded
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* Calculates if a color space conversion is needed.
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* \note Only 24 bit or grater images.
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* \param image The source image.
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* \param targetColorSpace The target color space.
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* \param defaultColorSpace The default color space to use it image does not contains one.
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* \return True if the conversion should be done otherwise false.
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*/
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static bool isColorSpaceConversionNeeded(const QImage &image, const QColorSpace &targetColorSpace, const QColorSpace &defaultColorSpace = QColorSpace());
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/*!
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* \brief isColorSpaceConversionNeeded
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*/
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inline bool isColorSpaceConversionNeeded(const QImage &image) const
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{
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return isColorSpaceConversionNeeded(image, _colorSpace, _defaultColorSpace);
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}
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private:
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// data
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QImage::Format _targetFormat;
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QColorSpace _colorSpace;
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QColorSpace _defaultColorSpace;
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// internal buffers
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QImage _tmpBuffer;
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QImage _convBuffer;
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};
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#endif // SCANLINECONVERTER_P_H
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