NetHack tile editor

Allows easier editing of NetHack's native tile format.

Keys:

• '?': toggle this text
• 'm': toggle between draw and selection modes
• '-': change preview-pane edit direction
• '1': randomize preview
• '2': order preview, starting from current tile
• '3': wall example preview, starting from current tile
• '4': 3x3 explosion preview (9 tiles)
• '5': 3x3 swallowed preview (8 surrounding tiles)
• '8', '9': change preview width

Draw mode: click on tile to change pixels.

• 'u': undo
• '.': color picker
• 'r': replace all pixels of (color under cursor) with current color
• 'o': rotate tile
• 'v': paste clip
• 'z': toggle between clip and pixel drawing
• 'a'/'s': next/previous clip
• 'del': delete current clip

Selection mode: click on tile to toggle selected pixels.

• 'c': add selection into new clip and change to draw mode
• 't': toggle selection of all pixels of (color under cursor)
• 'y': rectangle
• 'g': clear selection
• 'i': invert selection

code is on github.

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