phototonic - 2.1-2 main

Phototonic is an image viewer and organizer for Linux written in C++ and Qt5.
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Features:
- Light weight with a smooth and clear user interface
- Does not depend on any desktop environment
- Supports several customized thumbnail layouts
- Load thumbnails and browse images recursively on a folder tree
- Dynamic thumbnails loading, enables fast browsing of very large folders
- Filter thumbnails by name
- Image navigation and file management
- Slide show
- Transformation: rotation, flipping, cropping, image mirroring and scaling
- Adjust image brightness, saturation, hue and contrast
- Keep transformations, zoom and colors while browsing multiple images
- Extensive automatic and manual zoom options
- Supported image formats: BMP, GIF, ICO, JPEG, MNG, PBM, PGM, PNG, PPM,
TGA, XBM, XPM and SVG, SVGZ, TIFF with plugins
- Supports GIF animations
- Keyboard shortcuts and mouse behavior customization
- Load image files or folders from command line
- Open images with external applications