smalltiffwrapper.hpp

// This file is part of slideio project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://slideio.com/license.html.
#pragma once
#include "smallimage.hpp"
#include "slideio/imagetools/slideio_imagetools_def.hpp"
#include "slideio/imagetools/tiffkeeper.hpp"
#include "slideio/base/size.hpp"
#include "slideio/drivers/vsi/vsifile.hpp"
 
namespace libtiff
{
    struct tiff;
    typedef tiff TIFF;
}
 
namespace slideio
{
    class SLIDEIO_IMAGETOOLS_EXPORTS SmallTiffWrapper : public SmallImage
    {
    public:
        class SLIDEIO_IMAGETOOLS_EXPORTS SmallTiffPage : public SmallImagePage
        {
        public:
            SmallTiffPage(SmallTiffWrapper* parent, int pageIndex);
            Size getSize() const override;
            DataType getDataType() const override;
            int getNumChannels() const override;
            Compression getCompression() const override;
            const std::string& getMetadata() const override;
            void readRaster(cv::OutputArray raster) override;
            Resolution getResolution() const override;
        private:
            void extractMetadata();
        private:
            SmallTiffWrapper* m_parent;
            int m_pageIndex;
            Size m_size = {};
            DataType m_dataType = DataType::DT_Unknown;
            int m_numChannels;
            std::string m_metadata;
        };
    public:
        SmallTiffWrapper(const std::string& filePath);
        int getNumPages() const override;
        bool isValid() const override;
        SmallImagePage* readPage(int pageIndex) override;
        const TiffDirectory& getDirectory(int dirIndex);
        libtiff::TIFF* getHandle() const;
    private:
        TIFFKeeper m_pTiff;
        std::vector<TiffDirectory> m_directories;
        std::vector<std::shared_ptr<SmallTiffPage>> m_pages;
    };
 
}