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This commit is contained in:
Iliyan Angelov
2025-12-01 06:50:10 +02:00
parent 91f51bc6fe
commit 62c1fe5951
4682 changed files with 544807 additions and 31208 deletions
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81
Backend/venv/lib/python3.12/site-packages/PIL/PdfImagePlugin.py
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@@ -19,13 +19,15 @@
##
# Image plugin for PDF images (output only).
##
from __future__ import annotations
import io
import math
import os
import time
from typing import IO, Any
from . import Image, ImageFile, ImageSequence, PdfParser, __version__, features
from . import Image, ImageFile, ImageSequence, PdfParser, features
#
# --------------------------------------------------------------------
@@ -38,7 +40,7 @@ from . import Image, ImageFile, ImageSequence, PdfParser, __version__, features
# 5. page contents
def _save_all(im, fp, filename):
def _save_all(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
_save(im, fp, filename, save_all=True)
@@ -46,7 +48,12 @@ def _save_all(im, fp, filename):
# (Internal) Image save plugin for the PDF format.
def _write_image(im, filename, existing_pdf, image_refs):
def _write_image(
im: Image.Image,
filename: str | bytes,
existing_pdf: PdfParser.PdfParser,
image_refs: list[PdfParser.IndirectReference],
) -> tuple[PdfParser.IndirectReference, str]:
# FIXME: Should replace ASCIIHexDecode with RunLengthDecode
# (packbits) or LZWDecode (tiff/lzw compression). Note that
# PDF 1.2 also supports Flatedecode (zip compression).
@@ -59,10 +66,10 @@ def _write_image(im, filename, existing_pdf, image_refs):
width, height = im.size
dict_obj = {"BitsPerComponent": 8}
dict_obj: dict[str, Any] = {"BitsPerComponent": 8}
if im.mode == "1":
if features.check("libtiff"):
filter = "CCITTFaxDecode"
decode_filter = "CCITTFaxDecode"
dict_obj["BitsPerComponent"] = 1
params = PdfParser.PdfArray(
[
@@ -77,26 +84,27 @@ def _write_image(im, filename, existing_pdf, image_refs):
]
)
else:
filter = "DCTDecode"
decode_filter = "DCTDecode"
dict_obj["ColorSpace"] = PdfParser.PdfName("DeviceGray")
procset = "ImageB" # grayscale
elif im.mode == "L":
filter = "DCTDecode"
decode_filter = "DCTDecode"
# params = f"<< /Predictor 15 /Columns {width-2} >>"
dict_obj["ColorSpace"] = PdfParser.PdfName("DeviceGray")
procset = "ImageB" # grayscale
elif im.mode == "LA":
filter = "JPXDecode"
decode_filter = "JPXDecode"
# params = f"<< /Predictor 15 /Columns {width-2} >>"
procset = "ImageB" # grayscale
dict_obj["SMaskInData"] = 1
elif im.mode == "P":
filter = "ASCIIHexDecode"
decode_filter = "ASCIIHexDecode"
palette = im.getpalette()
assert palette is not None
dict_obj["ColorSpace"] = [
PdfParser.PdfName("Indexed"),
PdfParser.PdfName("DeviceRGB"),
255,
len(palette) // 3 - 1,
PdfParser.PdfBinary(palette),
]
procset = "ImageI" # indexed color
@@ -108,15 +116,15 @@ def _write_image(im, filename, existing_pdf, image_refs):
image_ref = _write_image(smask, filename, existing_pdf, image_refs)[0]
dict_obj["SMask"] = image_ref
elif im.mode == "RGB":
filter = "DCTDecode"
decode_filter = "DCTDecode"
dict_obj["ColorSpace"] = PdfParser.PdfName("DeviceRGB")
procset = "ImageC" # color images
elif im.mode == "RGBA":
filter = "JPXDecode"
decode_filter = "JPXDecode"
procset = "ImageC" # color images
dict_obj["SMaskInData"] = 1
elif im.mode == "CMYK":
filter = "DCTDecode"
decode_filter = "DCTDecode"
dict_obj["ColorSpace"] = PdfParser.PdfName("DeviceCMYK")
procset = "ImageC" # color images
decode = [1, 0, 1, 0, 1, 0, 1, 0]
@@ -129,9 +137,9 @@ def _write_image(im, filename, existing_pdf, image_refs):
op = io.BytesIO()
if filter == "ASCIIHexDecode":
ImageFile._save(im, op, [("hex", (0, 0) + im.size, 0, im.mode)])
elif filter == "CCITTFaxDecode":
if decode_filter == "ASCIIHexDecode":
ImageFile._save(im, op, [ImageFile._Tile("hex", (0, 0) + im.size, 0, im.mode)])
elif decode_filter == "CCITTFaxDecode":
im.save(
op,
"TIFF",
@@ -139,21 +147,22 @@ def _write_image(im, filename, existing_pdf, image_refs):
# use a single strip
strip_size=math.ceil(width / 8) * height,
)
elif filter == "DCTDecode":
elif decode_filter == "DCTDecode":
Image.SAVE["JPEG"](im, op, filename)
elif filter == "JPXDecode":
elif decode_filter == "JPXDecode":
del dict_obj["BitsPerComponent"]
Image.SAVE["JPEG2000"](im, op, filename)
else:
msg = f"unsupported PDF filter ({filter})"
msg = f"unsupported PDF filter ({decode_filter})"
raise ValueError(msg)
stream = op.getvalue()
if filter == "CCITTFaxDecode":
filter: PdfParser.PdfArray | PdfParser.PdfName
if decode_filter == "CCITTFaxDecode":
stream = stream[8:]
filter = PdfParser.PdfArray([PdfParser.PdfName(filter)])
filter = PdfParser.PdfArray([PdfParser.PdfName(decode_filter)])
else:
filter = PdfParser.PdfName(filter)
filter = PdfParser.PdfName(decode_filter)
image_ref = image_refs.pop(0)
existing_pdf.write_obj(
@@ -172,12 +181,15 @@ def _write_image(im, filename, existing_pdf, image_refs):
return image_ref, procset
def _save(im, fp, filename, save_all=False):
def _save(
im: Image.Image, fp: IO[bytes], filename: str | bytes, save_all: bool = False
) -> None:
is_appending = im.encoderinfo.get("append", False)
filename_str = filename.decode() if isinstance(filename, bytes) else filename
if is_appending:
existing_pdf = PdfParser.PdfParser(f=fp, filename=filename, mode="r+b")
existing_pdf = PdfParser.PdfParser(f=fp, filename=filename_str, mode="r+b")
else:
existing_pdf = PdfParser.PdfParser(f=fp, filename=filename, mode="w+b")
existing_pdf = PdfParser.PdfParser(f=fp, filename=filename_str, mode="w+b")
dpi = im.encoderinfo.get("dpi")
if dpi:
@@ -187,9 +199,9 @@ def _save(im, fp, filename, save_all=False):
x_resolution = y_resolution = im.encoderinfo.get("resolution", 72.0)
info = {
"title": None
if is_appending
else os.path.splitext(os.path.basename(filename))[0],
"title": (
None if is_appending else os.path.splitext(os.path.basename(filename))[0]
),
"author": None,
"subject": None,
"keywords": None,
@@ -209,7 +221,7 @@ def _save(im, fp, filename, save_all=False):
existing_pdf.start_writing()
existing_pdf.write_header()
existing_pdf.write_comment(f"created by Pillow {__version__} PDF driver")
existing_pdf.write_comment("created by Pillow PDF driver")
#
# pages
@@ -226,12 +238,7 @@ def _save(im, fp, filename, save_all=False):
for im in ims:
im_number_of_pages = 1
if save_all:
try:
im_number_of_pages = im.n_frames
except AttributeError:
# Image format does not have n_frames.
# It is a single frame image
pass
im_number_of_pages = getattr(im, "n_frames", 1)
number_of_pages += im_number_of_pages
for i in range(im_number_of_pages):
image_refs.append(existing_pdf.next_object_id(0))
@@ -248,7 +255,9 @@ def _save(im, fp, filename, save_all=False):
page_number = 0
for im_sequence in ims:
im_pages = ImageSequence.Iterator(im_sequence) if save_all else [im_sequence]
im_pages: ImageSequence.Iterator | list[Image.Image] = (
ImageSequence.Iterator(im_sequence) if save_all else [im_sequence]
)
for im in im_pages:
image_ref, procset = _write_image(im, filename, existing_pdf, image_refs)