"""The REM HUD texture file (.txm) -- the icons drawn in the target brackets (rem_target_hud.cpp).

A .txm is a UTF file with one "Texture library" node, as DATA\\INTERFACE\\ButtonTextures.txm. Each
PNG becomes a grey 32-bit TGA with alpha (brightest pixel white, three mips) named
"REM_<name>.tga"; the HUD tints it with the bracket colour like Freelancer's own target corners.
DATA\\INTERFACE\\REM\\rem_hud.ini lists the textures as shapes (tex_shape = REM_<name>.tga).

    python tools/make_hud_txm.py <out.txm> <name>=<in.png> [<name>=<in.png> ...]

Example (the shipped file):

    python tools/make_hud_txm.py DATA/INTERFACE/REM/rem_hud.txm \\
        skull=EXE/REM/UI/ICON/skull_icon.png \\
        probe=EXE/REM/UI/ICON/sensorprobe_active.png \\
        menu=EXE/REM/UI/ICON/target_menu.png
"""
import os
import sys

sys.path.insert(0, os.path.dirname(__file__))
import make_icon_3db as icon  # noqa: E402
import utf                    # noqa: E402

TEX_SIZE = 64


def make(out, entries):
    N = utf.Node
    textures = []
    for name, png in entries:
        w, h, rows = icon.read_png(png)
        w, h, rows = icon.crop_to_content(w, h, rows)
        mips = [icon.tga(icon.to_grey(icon.resample(w, h, rows, size)))
                for size in (TEX_SIZE, TEX_SIZE // 2, TEX_SIZE // 4)]
        textures.append(N('REM_' + name + '.tga', children=[N('MIP%d' % i, data=m) for i, m in enumerate(mips)]))
    root = N('\\', children=[N('Texture library', children=textures)])
    os.makedirs(os.path.dirname(os.path.abspath(out)), exist_ok=True)
    utf.write(out, root)


if __name__ == '__main__':
    if len(sys.argv) < 3 or any('=' not in a for a in sys.argv[2:]):
        print(__doc__)
        sys.exit(1)
    make(sys.argv[1], [a.split('=', 1) for a in sys.argv[2:]])
    print('wrote', sys.argv[1])