zsennenga

Struct(
    "signature" / Const(b"MT\xbe\xef"),
    "unknown_const_256" / Const(256, Int16ul) * "Probably part of the signature",
    "width" / Int16ul,
    "minimum_bytes_per_row" / Int16ul * "Likely used to aid resizing",
    "height" / Int16ul * "Seems to be decreased by 1 when using the standard builder. Bug?",
    "color_count" / Const(16, Int16ul),
    "palette_and_image_size" / Int16ul * "This seems to be unused - and it bugs out with larger images. You can easily exceed a short, even with the default generator",
    "sky_palette_index" / Int16ul * "This is the palette index referring to what the sky was",
    "unknowns_16" / Struct(

zsennenga

Struct(
    "signature" / Const(b"MT\xbe\xef"),
    "unknown_const_256" / Const(256, Int16ul) * "Probably part of the signature",
    "width" / Int16ul,
    "unknown_1" / Int16ul,
    "height" / Int16ul * "Seems to be decreased by 1 when using the standard builder. Bug?",
    "color_count" / Const(16, Int16ul), 
    "palette_and_image_size" / Int16ul * "This seems to be unused - and it bugs out with larger images. You can easily exceed a short, even with the default generator",
    "unknown_2" / Int16ul,
    "unknown_3" / Int16ul,

zsennenga

Struct(
    "signature" / Const(b"MT\xbe\xef"),
    "unknown_const_256" / Const(256, Int16ul) * "Probably part of the signature",
    "width" / Int16ul,
    "unknown_1" / Int16ul,
    "height" / Int16ul * "Seems to be decreased by 1 when using the standard builder. Bug?",
    "color_count" / Const(16, Int16ul), 
    "palette_and_image_size" / Int16ul * "This seems to be unused - and it bugs out with larger images. You can easily exceed a short, even with the default generator",
    "unknown_2" / Int16ul,
    "unknown_3" / Int16ul,

zsennenga

Struct(
    "signature" / Const(b"MT\xbe\xef"),
    "unknown_const_256" / Const(256, Int16ul) * "Probably part of the signature",
    "header" / Int16ul[18]
    "palette" / Array(
        16,
        Struct(
            "R" / Int8ul,
            "G" / Int8ul,
            "B" / Int8ul,

zsennenga

Struct(
    "signature" / Const(b"BM"),
    "file_size" / Rebuild(Int32ul, lambda ctx: 14 + 40 + int((ctx.height * ctx.width * ctx.bpp) / 8)),
    Padding(4),
    "data_offset" / Rebuild(Int32ul, 14 + 40 + ((2 ** this.bpp if this.bpp <= 8 else 0) * 4)),
    "header_size" / Const(40, Int32ul),
    "width" / Int32sl,
    "height" / Int32sl,
    "planes" / Int16ul,
    "bpp" / Const(4, Int16ul),  # bits per pixel