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author | 2022-11-13 23:46:45 +0530 | |
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committer | 2022-11-13 23:46:45 +0530 | |
commit | 9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch) | |
tree | 0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/PIL/FtexImagePlugin.py | |
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Diffstat (limited to 'env/lib/python3.10/site-packages/PIL/FtexImagePlugin.py')
-rw-r--r-- | env/lib/python3.10/site-packages/PIL/FtexImagePlugin.py | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/env/lib/python3.10/site-packages/PIL/FtexImagePlugin.py b/env/lib/python3.10/site-packages/PIL/FtexImagePlugin.py new file mode 100644 index 0000000..1b714eb --- /dev/null +++ b/env/lib/python3.10/site-packages/PIL/FtexImagePlugin.py @@ -0,0 +1,122 @@ +""" +A Pillow loader for .ftc and .ftu files (FTEX) +Jerome Leclanche <jerome@leclan.ch> + +The contents of this file are hereby released in the public domain (CC0) +Full text of the CC0 license: + https://creativecommons.org/publicdomain/zero/1.0/ + +Independence War 2: Edge Of Chaos - Texture File Format - 16 October 2001 + +The textures used for 3D objects in Independence War 2: Edge Of Chaos are in a +packed custom format called FTEX. This file format uses file extensions FTC +and FTU. +* FTC files are compressed textures (using standard texture compression). +* FTU files are not compressed. +Texture File Format +The FTC and FTU texture files both use the same format. This +has the following structure: +{header} +{format_directory} +{data} +Where: +{header} = { + u32:magic, + u32:version, + u32:width, + u32:height, + u32:mipmap_count, + u32:format_count +} + +* The "magic" number is "FTEX". +* "width" and "height" are the dimensions of the texture. +* "mipmap_count" is the number of mipmaps in the texture. +* "format_count" is the number of texture formats (different versions of the +same texture) in this file. + +{format_directory} = format_count * { u32:format, u32:where } + +The format value is 0 for DXT1 compressed textures and 1 for 24-bit RGB +uncompressed textures. +The texture data for a format starts at the position "where" in the file. + +Each set of texture data in the file has the following structure: +{data} = format_count * { u32:mipmap_size, mipmap_size * { u8 } } +* "mipmap_size" is the number of bytes in that mip level. For compressed +textures this is the size of the texture data compressed with DXT1. For 24 bit +uncompressed textures, this is 3 * width * height. Following this are the image +bytes for that mipmap level. + +Note: All data is stored in little-Endian (Intel) byte order. +""" + +import struct +from enum import IntEnum +from io import BytesIO + +from . import Image, ImageFile +from ._deprecate import deprecate + +MAGIC = b"FTEX" + + +class Format(IntEnum): + DXT1 = 0 + UNCOMPRESSED = 1 + + +def __getattr__(name): + for enum, prefix in {Format: "FORMAT_"}.items(): + if name.startswith(prefix): + name = name[len(prefix) :] + if name in enum.__members__: + deprecate(f"{prefix}{name}", 10, f"{enum.__name__}.{name}") + return enum[name] + raise AttributeError(f"module '{__name__}' has no attribute '{name}'") + + +class FtexImageFile(ImageFile.ImageFile): + format = "FTEX" + format_description = "Texture File Format (IW2:EOC)" + + def _open(self): + if not _accept(self.fp.read(4)): + raise SyntaxError("not an FTEX file") + struct.unpack("<i", self.fp.read(4)) # version + self._size = struct.unpack("<2i", self.fp.read(8)) + mipmap_count, format_count = struct.unpack("<2i", self.fp.read(8)) + + self.mode = "RGB" + + # Only support single-format files. + # I don't know of any multi-format file. + assert format_count == 1 + + format, where = struct.unpack("<2i", self.fp.read(8)) + self.fp.seek(where) + (mipmap_size,) = struct.unpack("<i", self.fp.read(4)) + + data = self.fp.read(mipmap_size) + + if format == Format.DXT1: + self.mode = "RGBA" + self.tile = [("bcn", (0, 0) + self.size, 0, 1)] + elif format == Format.UNCOMPRESSED: + self.tile = [("raw", (0, 0) + self.size, 0, ("RGB", 0, 1))] + else: + raise ValueError(f"Invalid texture compression format: {repr(format)}") + + self.fp.close() + self.fp = BytesIO(data) + + def load_seek(self, pos): + pass + + +def _accept(prefix): + return prefix[:4] == MAGIC + + +Image.register_open(FtexImageFile.format, FtexImageFile, _accept) +Image.register_extensions(FtexImageFile.format, [".ftc", ".ftu"]) |