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Diffstat (limited to '.venv/lib/python3.12/site-packages/PIL/TgaImagePlugin.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/PIL/TgaImagePlugin.py | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/PIL/TgaImagePlugin.py b/.venv/lib/python3.12/site-packages/PIL/TgaImagePlugin.py new file mode 100644 index 00000000..90d5b5cf --- /dev/null +++ b/.venv/lib/python3.12/site-packages/PIL/TgaImagePlugin.py @@ -0,0 +1,264 @@ +# +# The Python Imaging Library. +# $Id$ +# +# TGA file handling +# +# History: +# 95-09-01 fl created (reads 24-bit files only) +# 97-01-04 fl support more TGA versions, including compressed images +# 98-07-04 fl fixed orientation and alpha layer bugs +# 98-09-11 fl fixed orientation for runlength decoder +# +# Copyright (c) Secret Labs AB 1997-98. +# Copyright (c) Fredrik Lundh 1995-97. +# +# See the README file for information on usage and redistribution. +# +from __future__ import annotations + +import warnings +from typing import IO + +from . import Image, ImageFile, ImagePalette +from ._binary import i16le as i16 +from ._binary import o8 +from ._binary import o16le as o16 + +# +# -------------------------------------------------------------------- +# Read RGA file + + +MODES = { + # map imagetype/depth to rawmode + (1, 8): "P", + (3, 1): "1", + (3, 8): "L", + (3, 16): "LA", + (2, 16): "BGRA;15Z", + (2, 24): "BGR", + (2, 32): "BGRA", +} + + +## +# Image plugin for Targa files. + + +class TgaImageFile(ImageFile.ImageFile): + format = "TGA" + format_description = "Targa" + + def _open(self) -> None: + # process header + assert self.fp is not None + + s = self.fp.read(18) + + id_len = s[0] + + colormaptype = s[1] + imagetype = s[2] + + depth = s[16] + + flags = s[17] + + self._size = i16(s, 12), i16(s, 14) + + # validate header fields + if ( + colormaptype not in (0, 1) + or self.size[0] <= 0 + or self.size[1] <= 0 + or depth not in (1, 8, 16, 24, 32) + ): + msg = "not a TGA file" + raise SyntaxError(msg) + + # image mode + if imagetype in (3, 11): + self._mode = "L" + if depth == 1: + self._mode = "1" # ??? + elif depth == 16: + self._mode = "LA" + elif imagetype in (1, 9): + self._mode = "P" if colormaptype else "L" + elif imagetype in (2, 10): + self._mode = "RGB" if depth == 24 else "RGBA" + else: + msg = "unknown TGA mode" + raise SyntaxError(msg) + + # orientation + orientation = flags & 0x30 + self._flip_horizontally = orientation in [0x10, 0x30] + if orientation in [0x20, 0x30]: + orientation = 1 + elif orientation in [0, 0x10]: + orientation = -1 + else: + msg = "unknown TGA orientation" + raise SyntaxError(msg) + + self.info["orientation"] = orientation + + if imagetype & 8: + self.info["compression"] = "tga_rle" + + if id_len: + self.info["id_section"] = self.fp.read(id_len) + + if colormaptype: + # read palette + start, size, mapdepth = i16(s, 3), i16(s, 5), s[7] + if mapdepth == 16: + self.palette = ImagePalette.raw( + "BGRA;15Z", bytes(2 * start) + self.fp.read(2 * size) + ) + self.palette.mode = "RGBA" + elif mapdepth == 24: + self.palette = ImagePalette.raw( + "BGR", bytes(3 * start) + self.fp.read(3 * size) + ) + elif mapdepth == 32: + self.palette = ImagePalette.raw( + "BGRA", bytes(4 * start) + self.fp.read(4 * size) + ) + else: + msg = "unknown TGA map depth" + raise SyntaxError(msg) + + # setup tile descriptor + try: + rawmode = MODES[(imagetype & 7, depth)] + if imagetype & 8: + # compressed + self.tile = [ + ImageFile._Tile( + "tga_rle", + (0, 0) + self.size, + self.fp.tell(), + (rawmode, orientation, depth), + ) + ] + else: + self.tile = [ + ImageFile._Tile( + "raw", + (0, 0) + self.size, + self.fp.tell(), + (rawmode, 0, orientation), + ) + ] + except KeyError: + pass # cannot decode + + def load_end(self) -> None: + if self._flip_horizontally: + self.im = self.im.transpose(Image.Transpose.FLIP_LEFT_RIGHT) + + +# +# -------------------------------------------------------------------- +# Write TGA file + + +SAVE = { + "1": ("1", 1, 0, 3), + "L": ("L", 8, 0, 3), + "LA": ("LA", 16, 0, 3), + "P": ("P", 8, 1, 1), + "RGB": ("BGR", 24, 0, 2), + "RGBA": ("BGRA", 32, 0, 2), +} + + +def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None: + try: + rawmode, bits, colormaptype, imagetype = SAVE[im.mode] + except KeyError as e: + msg = f"cannot write mode {im.mode} as TGA" + raise OSError(msg) from e + + if "rle" in im.encoderinfo: + rle = im.encoderinfo["rle"] + else: + compression = im.encoderinfo.get("compression", im.info.get("compression")) + rle = compression == "tga_rle" + if rle: + imagetype += 8 + + id_section = im.encoderinfo.get("id_section", im.info.get("id_section", "")) + id_len = len(id_section) + if id_len > 255: + id_len = 255 + id_section = id_section[:255] + warnings.warn("id_section has been trimmed to 255 characters") + + if colormaptype: + palette = im.im.getpalette("RGB", "BGR") + colormaplength, colormapentry = len(palette) // 3, 24 + else: + colormaplength, colormapentry = 0, 0 + + if im.mode in ("LA", "RGBA"): + flags = 8 + else: + flags = 0 + + orientation = im.encoderinfo.get("orientation", im.info.get("orientation", -1)) + if orientation > 0: + flags = flags | 0x20 + + fp.write( + o8(id_len) + + o8(colormaptype) + + o8(imagetype) + + o16(0) # colormapfirst + + o16(colormaplength) + + o8(colormapentry) + + o16(0) + + o16(0) + + o16(im.size[0]) + + o16(im.size[1]) + + o8(bits) + + o8(flags) + ) + + if id_section: + fp.write(id_section) + + if colormaptype: + fp.write(palette) + + if rle: + ImageFile._save( + im, + fp, + [ImageFile._Tile("tga_rle", (0, 0) + im.size, 0, (rawmode, orientation))], + ) + else: + ImageFile._save( + im, + fp, + [ImageFile._Tile("raw", (0, 0) + im.size, 0, (rawmode, 0, orientation))], + ) + + # write targa version 2 footer + fp.write(b"\000" * 8 + b"TRUEVISION-XFILE." + b"\000") + + +# +# -------------------------------------------------------------------- +# Registry + + +Image.register_open(TgaImageFile.format, TgaImageFile) +Image.register_save(TgaImageFile.format, _save) + +Image.register_extensions(TgaImageFile.format, [".tga", ".icb", ".vda", ".vst"]) + +Image.register_mime(TgaImageFile.format, "image/x-tga") |