A new application to manipulate sprite sheets: https://github.com/valterb/spritesheet-utility , thanks to Valter Buccina!
It is a GUI application for Windows.
- Load the necessary images and create the spritesheet.
Flip and resize individual images (with or without constraints of proportions). It might be useful for creating spritesheets in the opposite directions.
For resizing it is possible to set the interpolation mode in those proposed in TResizeInterpolation.
Finally you can load a spritesheet and see the animation. Frame sizes are automatically calculated based on the number of frames and columns. It is possible to change frames per second during the animation.