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Diffstat (limited to '.venv/lib/python3.12/site-packages/PIL/MpoImagePlugin.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/PIL/MpoImagePlugin.py | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/PIL/MpoImagePlugin.py b/.venv/lib/python3.12/site-packages/PIL/MpoImagePlugin.py new file mode 100644 index 00000000..71f89a09 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/PIL/MpoImagePlugin.py @@ -0,0 +1,190 @@ +# +# The Python Imaging Library. +# $Id$ +# +# MPO file handling +# +# See "Multi-Picture Format" (CIPA DC-007-Translation 2009, Standard of the +# Camera & Imaging Products Association) +# +# The multi-picture object combines multiple JPEG images (with a modified EXIF +# data format) into a single file. While it can theoretically be used much like +# a GIF animation, it is commonly used to represent 3D photographs and is (as +# of this writing) the most commonly used format by 3D cameras. +# +# History: +# 2014-03-13 Feneric Created +# +# See the README file for information on usage and redistribution. +# +from __future__ import annotations + +import itertools +import os +import struct +from typing import IO, Any, cast + +from . import ( + Image, + ImageFile, + ImageSequence, + JpegImagePlugin, + TiffImagePlugin, +) +from ._binary import o32le + + +def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None: + JpegImagePlugin._save(im, fp, filename) + + +def _save_all(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None: + append_images = im.encoderinfo.get("append_images", []) + if not append_images and not getattr(im, "is_animated", False): + _save(im, fp, filename) + return + + mpf_offset = 28 + offsets: list[int] = [] + for imSequence in itertools.chain([im], append_images): + for im_frame in ImageSequence.Iterator(imSequence): + if not offsets: + # APP2 marker + im_frame.encoderinfo["extra"] = ( + b"\xFF\xE2" + struct.pack(">H", 6 + 82) + b"MPF\0" + b" " * 82 + ) + exif = im_frame.encoderinfo.get("exif") + if isinstance(exif, Image.Exif): + exif = exif.tobytes() + im_frame.encoderinfo["exif"] = exif + if exif: + mpf_offset += 4 + len(exif) + + JpegImagePlugin._save(im_frame, fp, filename) + offsets.append(fp.tell()) + else: + im_frame.save(fp, "JPEG") + offsets.append(fp.tell() - offsets[-1]) + + ifd = TiffImagePlugin.ImageFileDirectory_v2() + ifd[0xB000] = b"0100" + ifd[0xB001] = len(offsets) + + mpentries = b"" + data_offset = 0 + for i, size in enumerate(offsets): + if i == 0: + mptype = 0x030000 # Baseline MP Primary Image + else: + mptype = 0x000000 # Undefined + mpentries += struct.pack("<LLLHH", mptype, size, data_offset, 0, 0) + if i == 0: + data_offset -= mpf_offset + data_offset += size + ifd[0xB002] = mpentries + + fp.seek(mpf_offset) + fp.write(b"II\x2A\x00" + o32le(8) + ifd.tobytes(8)) + fp.seek(0, os.SEEK_END) + + +## +# Image plugin for MPO images. + + +class MpoImageFile(JpegImagePlugin.JpegImageFile): + format = "MPO" + format_description = "MPO (CIPA DC-007)" + _close_exclusive_fp_after_loading = False + + def _open(self) -> None: + self.fp.seek(0) # prep the fp in order to pass the JPEG test + JpegImagePlugin.JpegImageFile._open(self) + self._after_jpeg_open() + + def _after_jpeg_open(self, mpheader: dict[int, Any] | None = None) -> None: + self.mpinfo = mpheader if mpheader is not None else self._getmp() + if self.mpinfo is None: + msg = "Image appears to be a malformed MPO file" + raise ValueError(msg) + self.n_frames = self.mpinfo[0xB001] + self.__mpoffsets = [ + mpent["DataOffset"] + self.info["mpoffset"] for mpent in self.mpinfo[0xB002] + ] + self.__mpoffsets[0] = 0 + # Note that the following assertion will only be invalid if something + # gets broken within JpegImagePlugin. + assert self.n_frames == len(self.__mpoffsets) + del self.info["mpoffset"] # no longer needed + self.is_animated = self.n_frames > 1 + self._fp = self.fp # FIXME: hack + self._fp.seek(self.__mpoffsets[0]) # get ready to read first frame + self.__frame = 0 + self.offset = 0 + # for now we can only handle reading and individual frame extraction + self.readonly = 1 + + def load_seek(self, pos: int) -> None: + self._fp.seek(pos) + + def seek(self, frame: int) -> None: + if not self._seek_check(frame): + return + self.fp = self._fp + self.offset = self.__mpoffsets[frame] + + original_exif = self.info.get("exif") + if "exif" in self.info: + del self.info["exif"] + + self.fp.seek(self.offset + 2) # skip SOI marker + if not self.fp.read(2): + msg = "No data found for frame" + raise ValueError(msg) + self.fp.seek(self.offset) + JpegImagePlugin.JpegImageFile._open(self) + if self.info.get("exif") != original_exif: + self._reload_exif() + + self.tile = [ + ImageFile._Tile("jpeg", (0, 0) + self.size, self.offset, self.tile[0][-1]) + ] + self.__frame = frame + + def tell(self) -> int: + return self.__frame + + @staticmethod + def adopt( + jpeg_instance: JpegImagePlugin.JpegImageFile, + mpheader: dict[int, Any] | None = None, + ) -> MpoImageFile: + """ + Transform the instance of JpegImageFile into + an instance of MpoImageFile. + After the call, the JpegImageFile is extended + to be an MpoImageFile. + + This is essentially useful when opening a JPEG + file that reveals itself as an MPO, to avoid + double call to _open. + """ + jpeg_instance.__class__ = MpoImageFile + mpo_instance = cast(MpoImageFile, jpeg_instance) + mpo_instance._after_jpeg_open(mpheader) + return mpo_instance + + +# --------------------------------------------------------------------- +# Registry stuff + +# Note that since MPO shares a factory with JPEG, we do not need to do a +# separate registration for it here. +# Image.register_open(MpoImageFile.format, +# JpegImagePlugin.jpeg_factory, _accept) +Image.register_save(MpoImageFile.format, _save) +Image.register_save_all(MpoImageFile.format, _save_all) + +Image.register_extension(MpoImageFile.format, ".mpo") + +Image.register_mime(MpoImageFile.format, "image/mpo") |