Kylian Ronfleux--Corail
13bffef91d
Fix quantization table scaling when quality is applied to custom qtables
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When both a custom quantization table and a quality value are provided,
the quantization table should be scaled using the JPEG quality scaling factor.
If quality is not explicitly set, the default base quality of 50 is used to preserve the original table.
This ensures consistent behavior when saving JPEGs with custom qtables.
Fixes part of the issue with applying 'quality' to 'qtables'.
2025-04-10 10:01:02 +00:00
Kylian Ronfleux--Corail
e3c0ee6ae2
Fix incorrect quality scaling when using qtables in JPEG encoder
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When both `qtables` and `quality` are provided, Pillow previously passed
the raw `quality` value directly to `jpeg_add_quant_table()` as the scale
factor, which caused incorrect quantization.
This commit corrects the behavior by using `jpeg_quality_scaling(quality)`
to compute the proper JPEG quantization scaling factor, consistent with
`jpeg_set_quality()`.
This ensures expected compression behavior when custom qtables are used
alongside a specified quality level.
2025-04-10 07:31:05 +00:00
pre-commit-ci[bot]
a5a8ece5d2
[pre-commit.ci] auto fixes from pre-commit.com hooks
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2025-04-07 17:17:36 +00:00
wiredfool
5c76e7ec17
Image -> Arrow support ( #8330 )
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Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
2025-04-01 09:10:45 +03:00
Andrew Murray
e8a9b56603
Improved connecting discontiguous corners ( #8659 )
2025-03-29 18:33:51 +02:00
Andrew Murray
93cdfeb488
Prevent TIFFRGBAImageBegin from applying image orientation ( #8556 )
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Co-authored-by: Andrew Murray <radarhere@users.noreply.github.com>
2025-03-29 18:25:57 +02:00
Andrew Murray
295a5e9bd7
Do not convert BC1 LUT to UINT32
2025-03-27 21:36:17 +11:00
Andrew Murray
cd11792c15
Added BC5 saving
2025-03-17 07:55:25 +11:00
Andrew Murray
f1a61a1e76
Added DXT3 saving
2025-03-17 07:55:24 +11:00
Andrew Murray
9f619b814f
Added BC3 loading and saving
2025-03-17 07:55:24 +11:00
Andrew Murray
9430bbe5a1
Added DXT5 saving
2025-03-17 07:55:24 +11:00
Andrew Murray
3dbd0e57ba
Added DXT1 encoding
2025-03-17 07:55:24 +11:00
Andrew Murray
92cc9bf902
Support reading grayscale images with 4 channels
2025-03-03 08:46:20 +11:00
Andrew Murray
f598c03233
Removed unused file
2025-01-29 17:33:55 +11:00
Aleksandr Karpinskii
849768df7a
Remove unused declaration
2025-01-28 20:40:43 +11:00
Hugo van Kemenade
01792cbff0
Merge pull request #8652 from radarhere/tile
2025-01-08 19:03:31 +02:00
Hugo van Kemenade
6bce9aa461
Merge pull request #8645 from radarhere/mozjpeg
2025-01-08 18:44:21 +02:00
Andrew Murray
73a383fa72
Use rawmode instead of splitting and merging
2025-01-05 06:11:54 +11:00
Andrew Murray
ae59b03956
Do not use MozJPEG progressive default
2024-12-31 21:44:57 +11:00
Andrew Murray
f91b111fac
Removed pre-C99 definitions
2024-12-31 20:42:49 +11:00
Andrew Murray
ea962bf1d8
Added RGBX;16N to RGB unpacker
2024-12-29 16:59:32 +11:00
Andrew Murray
973cd6481a
Merge branch 'main' into jpeg2000_cmyk_save
2024-12-28 22:08:08 +11:00
Andrew Murray
05c981ffd7
Removed buffer_size variable
2024-12-28 15:41:19 +11:00
Andrew Murray
439d5cf2a0
Merge branch 'main' into jpeg2000_cmyk_save
2024-12-28 07:42:56 +11:00
Andrew Murray
fb3d80e390
Fixed connecting discontiguous corners
2024-12-24 00:41:27 +11:00
Andrew Murray
522505b714
Support saving CMYK JPEG2000 images
2024-12-10 18:33:12 +11:00
Andrew Murray
7edf952832
Do not close provided file handles with libtiff
2024-10-11 19:37:56 +11:00
Andrew Murray
7777260b6b
Merge pull request #8438 from radarhere/filter
2024-10-10 21:50:51 +11:00
pre-commit-ci[bot]
a609d65b33
[pre-commit.ci] auto fixes from pre-commit.com hooks
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2024-10-07 17:56:23 +00:00
Hugo van Kemenade
535bf234c3
Merge pull request #8341 from uploadcare/use-ptr
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Use ImagingCore.ptr instead of ImagingCore.id
2024-10-07 13:37:44 +03:00
Alexander Karpinsky
8e332eb3b0
Apply suggestions from code review
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Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>
2024-10-07 13:05:13 +04:00
Andrew Murray
418ae7caa2
Support BuiltinFilter for I;16* images
2024-10-05 01:12:51 +10:00
Hugo van Kemenade
c9c8d45898
Merge pull request #8422 from radarhere/resize_i16
2024-10-01 13:55:13 +03:00
Hugo van Kemenade
ea15e0e622
Merge pull request #8413 from radarhere/sgirle_memory
2024-10-01 13:52:22 +03:00
Hugo van Kemenade
747fdf5069
Merge pull request #8402 from radarhere/sgirle
2024-10-01 13:52:08 +03:00
Andrew Murray
42ad42c174
Merge branch 'main' into resize_i16
2024-09-30 19:50:26 +10:00
Andrew Murray
851449edfc
Free memory on early return
2024-09-30 19:49:13 +10:00
Andrew Murray
fc65e437cf
Prevent division by zero
2024-09-30 19:48:53 +10:00
Andrew Murray
cc0b6b9de9
Cast int before potentially exceeding INT_MAX
2024-09-30 19:47:52 +10:00
Andrew Murray
04a00d273c
Support all resampling filters when resizing I;16* images
2024-09-28 14:27:40 +10:00
Andrew Murray
e57da68190
Check image value before use
2024-09-20 19:20:53 +10:00
pre-commit-ci[bot]
9424b1a892
[pre-commit.ci] auto fixes from pre-commit.com hooks
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2024-09-19 19:59:15 +00:00
PavlNekrasov
46f2fa17be
fix dereference before checking for NULL in the ImagingTransformAffine function
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The `imIn` pointer is checked for `NULL`, but it seems to be dereferenced before this check. You must first make sure that the pointer is not `NULL` before using it.
2024-09-19 22:53:45 +03:00
Alexander Karpinsky
af521a1ce1
Merge branch 'main' into use-ptr
2024-09-18 22:24:46 +02:00
Aleksandr Karpinskii
4a284a78c5
Remove weird comments
2024-09-11 20:40:46 +10:00
Andrew Murray
63f398bc12
Merge pull request #8194 from uploadcare/optimize-getbbox
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Optimize getbbox() and getextrema() routines
2024-09-09 15:08:11 +10:00
Aleksandr Karpinskii
5428e3568e
Deprecate ImageCore.id and ImageCore.unsafe_ptrs
2024-09-08 17:30:23 +04:00
Aleksandr Karpinskii
7f48567002
Use s# in PyArg_ParseTuple
2024-09-08 17:30:23 +04:00
Hugo van Kemenade
a838da7406
Merge pull request #8002 from Yay295/patch-1
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Use (void) for empty function parameters
2024-09-07 08:37:50 +03:00
Andrew Murray
a6ca45aea6
Use (void) to indicate no parameters
2024-09-07 00:01:25 -05:00
