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Author SHA1 Message Date
Johannes 'josch' Schauer
03bdc33053
src/img2pdf.py: be more explicit when embedding group4 from TIFF 2018-08-20 10:26:39 +02:00
Johannes 'josch' Schauer
b758b54ce8
src/img2pdf.py: Disallow TIFF input with more than 8 bits per sample because PIL will silently convert it to 8 bits per sample 2018-08-20 10:25:39 +02:00
Johannes 'josch' Schauer
a2b969640a
src/img2pdf.py: assign the default dpi to tiff images where PIL returned its default of (1,1) 2018-08-20 10:24:31 +02:00
Johannes 'josch' Schauer
8961c78dbf
src/img2pdf.py: add commented-out debugging option for PIL's TiffImagePlugin 2018-08-20 10:23:23 +02:00
Johannes 'josch' Schauer
6c44d8cea6
src/img2pdf.py: add more rationale behind palette encoding 2018-08-20 10:21:18 +02:00
Johannes 'josch' Schauer
c0ed810036
src/img2pdf.py: work around PIL not reporting a colorspace for 16bit grayscale PNGs 2018-08-17 12:57:46 +02:00
Johannes 'josch' Schauer
ccca845606
src/img2pdf.py: Read bits per sample from PNG to support PNG images with 1, 2, 4 or 16 bits per sample 2018-08-17 12:55:55 +02:00
Johannes 'josch' Schauer
53685934f9
src/img2pdf.py: also reject palette images with transparency 2018-08-17 07:27:15 +02:00
Johannes 'josch' Schauer
ba5a9a1dfc
Allow multipage CCITT group 4 TIFF images 2018-08-16 00:23:18 +02:00
Johannes 'josch' Schauer
a628ed22f9
Add more debugging output 2018-08-16 00:11:07 +02:00
Johannes 'josch' Schauer
fbcaca5e6b
big endian encoded TIFF files may have FillOrder set to lsb-to-msb and must have the bits of each byte reversed 2018-08-16 00:10:46 +02:00
Johannes 'josch' Schauer
a9f4c9b665
release version 0.3.1 2018-08-04 15:44:45 +02:00
Johannes 'josch' Schauer
002c9c4466
CHANGES.rst: add release dates 2018-08-04 14:37:38 +02:00
Johannes 'josch' Schauer
198c98a5f9
make pep8 compliant 2018-08-01 22:28:44 +02:00
Johannes 'josch' Schauer
9395b6fbbe
README.md: comparison to other software 2018-08-01 22:14:14 +02:00
Johannes 'josch' Schauer
f5d8d86dff
Also do not re-encode CCITT Group 4 encoded TIFF images 
Add additional property of input images: inverted

closes: #47
 2018-08-01 22:12:40 +02:00
Johannes 'josch' Schauer
36c5034db5
Distribute LICENSE file in release tarball 2018-08-01 20:41:02 +02:00
Jakub Wilk
7131b3d6ee
Use printf(1) instead of non-portable "/bin/echo -ne" 2018-07-21 12:08:23 +02:00
Johannes 'josch' Schauer
b3fb2de5f6
src/img2pdf.py: fix spelling in --help output 2018-07-19 12:05:27 +02:00
Johannes 'josch' Schauer
4c5faf408f
README.md: restructure 2018-07-18 15:52:54 +02:00
Johannes 'josch' Schauer
2ad0c036b2
src/tests/input/mono.tif: set dpi to 72 2018-07-18 14:08:04 +02:00
Johannes 'josch' Schauer
1aa71e3746
release version 0.3.0 2018-07-18 11:30:43 +02:00
Johannes 'josch' Schauer
75c43de09d
Create a new PIL image before saving as TIFF to prevent libtiff errors 
closes: #46
 2018-07-18 01:58:03 +02:00
Johannes 'josch' Schauer
eec1a25a92
add test case for ccittfaxdecode 2018-07-18 01:55:48 +02:00
Johannes 'josch' Schauer
7de174f4b5
CCITTFaxDecode filter must be in an array 2018-07-18 01:55:48 +02:00
Johannes 'josch' Schauer
48d5b4d7af
CCITTGroup4 must return empty palette 2018-07-18 00:57:43 +02:00
Johannes 'josch' Schauer
ce68cb21d7
Add LICENSE file 
closes: #43
 2018-07-18 00:07:30 +02:00
Johannes 'josch' Schauer
d931f02709
src/tests/__init__.py: handle PNG input images properly 2018-07-18 00:05:15 +02:00
Johannes 'josch' Schauer
b99fae1380
src/tests/__init__.py: don't test for color space now that we support palette PNGs 2018-07-18 00:04:30 +02:00
Johannes 'josch' Schauer
ac9ba1d0f6
handle monochrome png properly 2018-07-18 00:03:31 +02:00
Johannes 'josch' Schauer
eaf9de23c9
Filter must not be array for PNG output, so never make it an array 2018-07-17 23:59:55 +02:00
Johannes 'josch' Schauer
2a33ff275d
adapt test output to new handling of png input 2018-07-17 23:56:01 +02:00
Johannes 'josch' Schauer
ebd8d911bb
add test grayscale input png src/tests/input/gray.png 2018-07-17 16:57:44 +02:00
Johannes 'josch' Schauer
e7755f0a87
src/tests/input/normal.png: remove alpha channel 2018-07-17 16:57:44 +02:00
Johannes 'josch' Schauer
47a1e0c81e
src/img2pdf.py: do not use PNG encoding for CMYK input 2018-07-17 16:57:44 +02:00
Johannes 'josch' Schauer
3142824bab
src/tests/__init__.py: do not test animation.gif with pdfrw because it doesn't support hexadecimal palette data 2018-07-17 16:57:44 +02:00
Johannes 'josch' Schauer
84ce9bbd9c
src/img2pdf.py: do not allow transparency 2018-07-17 16:57:44 +02:00
Johannes 'josch' Schauer
90293204b2
src/img2pdf.py: use logging.warning because warn() is deprecated 2018-07-17 16:07:01 +02:00
Johannes 'josch' Schauer
d09aa76c9e
README.md: remove ambiguous section about lossless compression 2018-06-16 16:56:01 +02:00
Johannes 'josch' Schauer
ade5768d72
src/img2pdf.py: expand error message about alpha channel 2018-03-27 10:39:24 +02:00
Johannes 'josch' Schauer
920506b867
Reflect the fact that we now use PNG compression in the --help output 2018-03-24 19:53:41 +01:00
Johannes 'josch' Schauer
e78dd80451
Add option --pillow-limit-break to force Pillow to accept large input images 2018-03-24 19:47:03 +01:00
Johannes 'josch' Schauer
d9a6c9db03
Interlaced PNGs cannot be directly embedded but have to be re-encoded 2018-03-24 18:59:02 +01:00
Johannes 'josch' Schauer
7244d2c6ed
Disallow input images with alpha channel as it cannot be preserved in the PDF and would thus make img2pdf not lossless 2018-03-24 18:55:14 +01:00
Johannes 'josch' Schauer
1d9a25dfd2
Proof of concept of using PDF DecodeParms for storing pixel data with PNG compression 2018-03-15 11:31:36 +01:00
Johannes 'josch' Schauer
9836b976d3 src/img2pdf.py: handle Pillow returning a DPI of zero (closes: #36) 2017-10-18 10:34:59 +02:00
James R. Barlow
a8269391e9 Implement /UserUnit scaling to support oversized PDFs 
The original PDF specification supported a maximum of 200x200" pages or
14400 PDF units. In PDF 1.6 rather than remove this limitation, Adobe
added the /UserUnit field for pages, which allows one to specify the
scaling that should be applied for user-facing numbers, while keeping
the internal limit of 14400 units.

Many real-world designs are larger than 200" in one direction. One
example is tractor feed or rolled paper which may be easier to scan in
one continuous run rather than segment into pages.

/UserUnit is independent of the pixel size and resolution of the image.

/UserUnit can also indicate very small page sizes but this is not
implemented here.
 2017-08-20 21:19:23 +09:00
James R. Barlow
b54617de19 Fix rawdata[:12] bytes/str comparison 2017-08-20 21:11:32 +09:00
Adam Groszer
0e76a5bd97 fixing a slew of python 2 issues 2017-08-07 11:21:42 +02:00
Johannes 'josch' Schauer
725462462b release version 0.2.4 2017-05-23 17:53:19 +02:00