MagickUtilities.h

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// Copyright (c) 2008-2019 OpenShot Studios, LLC
//
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#ifndef OPENSHOT_MAGICK_UTILITIES_H
#define OPENSHOT_MAGICK_UTILITIES_H
 
#ifdef USE_IMAGEMAGICK
 
    // Avoid a bug in the interaction between ImageMagick
    // and the standard C insertion headers, which can
    // cause functions used by macros in the standard C
    // assertion code to be put in an ImageMagick library
    // namespace instead of the global namespace
    #include <cassert>
 
    #include <memory>
    #include <QImage>
 
// Exclude a warning message with IM6 headers
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wignored-qualifiers"
    #include "Magick++.h"
#pragma GCC diagnostic pop
 
    // Determine ImageMagick version, as IM7 isn't fully
    // backwards compatible
    #ifndef NEW_MAGICK
        #define NEW_MAGICK (MagickLibVersion >= 0x700)
    #endif
 
    // IM7: <Magick::Image>->alpha(bool)
    // IM6: <Magick::Image>->matte(bool)
    #if NEW_MAGICK
        #define MAGICK_IMAGE_ALPHA(im, a) im->alpha((a))
    #else
        #define MAGICK_IMAGE_ALPHA(im, a) im->matte((a))
    #endif
 
    // IM7: vector<Magick::Drawable>
    // IM6: list<Magick::Drawable>
    // (both have the push_back() method which is all we use)
    #if NEW_MAGICK
        #define MAGICK_DRAWABLE std::vector<Magick::Drawable>
    #else
        #define MAGICK_DRAWABLE std::list<Magick::Drawable>
    #endif
 
namespace openshot {
 
    std::shared_ptr<Magick::Image>
    QImage2Magick(std::shared_ptr<QImage>);
 
    std::shared_ptr<QImage>
    Magick2QImage(std::shared_ptr<Magick::Image>);
 
}  // namespace
 
#endif  // USE_IMAGEMAGICK
#endif  // OPENSHOT_MAGICK_UTILITIES_H