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Author SHA1 Message Date
John Cupitt
5e77ab948b fix loop with malformed ppm 
skip_line in ppm parse was not testing for EOF, so it could get stuck
with malformed files

thanks Kyle-Kyle

see https://github.com/libvips/libvips/issues/1377
 2019-07-29 10:05:55 +01:00
John Cupitt
3510e7abcf fetch HEIC metadata from the main image 
since thumbs don't have it, see https://github.com/libvips/libvips/issues/1373
 2019-07-24 16:06:49 +01:00
John Cupitt
8cf6a9f9ca don't attempt to save large XMP to JPG 
jpeg_write_marker() with some libjpeg versions will throw a fatal
error with large chunks.

To write >64kb XMP it you need to parse the whole XMP object,
pull out the most important fields, code just them into the main
XMP block, then write any remaining XMP objects into a set of
extended XMP markers.

http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/xmp/pdfs/XMPSpecificationPart3.pdf

Instead, just warn and skip large XMP blocks.

see https://github.com/libvips/libvips/issues/1372
 2019-07-19 11:37:36 +01:00
John Cupitt
7f47acab56 tiny improvement 2019-07-10 17:43:17 +01:00
John Cupitt
5e2d66d14b better early shutdown behaviour in shrinkv 
read the tail of the input to force early shutdown in seq readers

does reducev need something similar?

see https://github.com/kleisauke/net-vips/issues/12
 2019-07-09 16:58:30 +01:00
John Cupitt
bad58598f6 fix "how it works" in docs 
I tried loads of ways to fix the rendering of this page, but swapping
the sections headings is the only one that works :(
 2019-07-07 17:18:48 +01:00
John Cupitt
37ef7ad231 tiny doc errors 2019-07-07 15:14:16 +01:00
John Cupitt
e4cff876a8 fix make dist 
we'd renamed a file
 2019-07-07 11:20:28 +01:00
John Cupitt
f45f0ecef4 limit resize if shrink would drop axis <1px 
vips_resize() will break the aspect ratio and limit resize on an axis if
it would result in an image of less than 1px on that axis

see https://github.com/lovell/sharp/issues/1782#issuecomment-508921306
 2019-07-07 10:19:33 +01:00
John Cupitt
26100041e7 fewer warnings on tiffload 
We were setting TIFFTAG_JPEGCOLORMODE == JPEGCOLORMODE_RGB for *all*
images, but libtiff warns if you use it on an image which is not
jpg-compressed.

Only set it for jpg-compressed images.

See https://github.com/libvips/libvips/issues/1329
 2019-07-02 12:23:53 +01:00
John Cupitt
01a92679b5 oop left some DEBUG turned on 2019-06-27 17:34:07 +01:00
John Cupitt
80648c2d2f text autofit could sometimes underfit 
The autofit loop would terminate if either width or height fitted exactly,
but this could happen very early by chance. This patch makes it keep
looping until it finds a dpi which just fits.

See https://github.com/libvips/libvips/issues/1352
 2019-06-27 17:19:53 +01:00
John Cupitt
8a98bea063 fix vipsthumbnail for pyr tiff files 
thumbnail was not testing pyramidal tiff images for pyramidness correctly.

see https://github.com/libvips/libvips/issues/1297
 2019-06-19 17:56:09 +01:00
John Cupitt
65c41ef7a5 fix a couple of clang compiler warnings 2019-06-15 17:35:46 +01:00
John Cupitt
631383026b revise README again 2019-06-15 13:21:43 +01:00
John Cupitt
aa9164713d note HEIC support in README 2019-06-15 13:14:26 +01:00
John Cupitt
75e69cc1e5 disable Orc if CET is on 
If we are building with -fcf-protection (run-time checking of
indirect jumps) then Orc won't work. Make sure it's off.

Orc may support -fcf-protection in the future, but does not in June 2019.

https://gcc.gnu.org/onlinedocs/gcc/Instrumentation-Options.html#index-fcf-protection
https://gitlab.freedesktop.org/gstreamer/orc/issues/17

see https://github.com/libvips/libvips/issues/1006#issuecomment-501802550
 2019-06-14 14:22:00 +01:00
John Cupitt
db36e19ffa note PNG XMP support in docs 2019-06-13 09:26:09 +01:00
John Cupitt
37a3a6322c remove 256 band limit from arithmetic.c 
there was a fixed-size array in vips__bandup()

see https://github.com/libvips/libvips/issues/1335
 2019-06-12 09:22:30 +01:00
John Cupitt
ad98222073 better behaviour for vips_region_fetch() 
we weren't clipping the fetch area against region valid, so in some
cases we could return many more pixels than expected

see https://github.com/libvips/pyvips/issues/103
 2019-06-09 20:38:13 +01:00
John Cupitt
eaaa203f0a better compat with older IM 
in the ismagick() test
 2019-06-08 17:32:04 +01:00
John Cupitt
dc8555201d use our sniffer as well is ismagick() 
We need to check files for magickload with our sniffer as well as the
imagemagick one.
 2019-06-08 17:13:49 +01:00
John Cupitt
bb75535151 much faster ismagick 
We used to Ping files to see if IM would load them, but this can be
extremely slow for file formats like ARW.

Instead, use GetImageMagick() ... it just checks the magic number.
 2019-06-08 16:47:40 +01:00
John Cupitt
eb6c803481 istiff tests first dir rather than magic number 
We were testing for TIFF by checking the magic number at the head of the
file. However, formats like ARW are TIFF-like without being TIFF, and
will not load with tiffload.

Instead, try reading the whole of the first directory. This is enough to
stop tiffload trying to load files where it will simply fail
immediately, and make libvips fall back to eg. imagemagick.

see https://github.com/libvips/libvips/issues/1304
 2019-06-07 17:52:13 +01:00
John Cupitt
dc16f1253a fix a memleak in tiff pyr to memory 
we were not freeing layers other than the top layer
 2019-06-06 10:20:14 +01:00
John Cupitt
bddbecffaf
Merge pull request #1331 from lovell/webp-lossless-quality 
Ensure WebP quality option is set for lossless
 2019-06-06 06:39:30 +01:00
Lovell Fuller
8d0a42efe2 Ensure WebP quality option is set for lossless 2019-06-05 23:01:06 +01:00
John Cupitt
5657099223 fix composite for some combinations of blend modes 
composite could get mixed up blend modes if:

- many images being composited
- some small and positioned with x/y
- at least one unskippable blend mode

phew!
 2019-06-04 15:24:54 +01:00
John Cupitt
81861baee9 add note to docs in vips_init() 2019-05-30 19:46:05 +01:00
John Cupitt
675c6361eb revise page-height rules again 
Only set `page-height` if `n` is set as an argument. This means you only
get a multi-page image if you specifically ask for it.
 2019-05-29 14:18:46 +01:00
John Cupitt
bd8a6980f5 more consistent behaviour for multi-page load 
Some loaders were setting page-height even when the user was loading a
single page triggering unexpected multi-page behaviour from later
savers.

New rule: only set page-height when loading more than one page.

See https://github.com/libvips/libvips/issues/1318
 2019-05-29 10:10:28 +01:00
John Cupitt
c7e213a9fa LinearGRAYColorspace is rather recent, it seems 2019-05-24 17:47:50 +01:00
John Cupitt
02bdb8b96c better error message for "unsupported colorspace" 
we just printed the enum number before
 2019-05-24 17:42:10 +01:00
John Cupitt
5855321638 improve realpath() compat on older libc 
older libc didn't allow a NULL for the second param
 2019-05-24 15:24:18 +01:00
John Cupitt
da402cee23 faster and more accurate bilinear 
go to fixed point earlier in calculation of interpolation coefficients
 2019-05-14 13:10:45 +01:00
John Cupitt
29d9673fd8 update comment 2019-05-14 08:20:30 +01:00
John Cupitt
44afdbc314 more accurate bicubic of int16 images 
use float path for int16 -- the fixed-point path can miss by a small
amount

see https://github.com/libvips/libvips/issues/1309
 2019-05-13 22:05:41 +01:00
John Cupitt
c9ba0915c1 more accurate bilinear for int16 pixels 
fixed-point interpolation could give small errors

see https://github.com/libvips/libvips/issues/1309

need a similar change for bicubic etc.
 2019-05-13 18:32:48 +01:00
John Cupitt
a02229245e tidy up conditionals a bit 2019-05-10 16:43:17 +01:00
John Cupitt
b2ad9f9df8 better compat with older libheif 
We were looking for "yes" from the builtin_h265_decoder variable to
enable heifload, but this variable was only added in libheif 1.3, so we
failed to turn on heifload correctly.

We now look for not "no", ie. default on.

See https://github.com/libvips/build-win64/pull/26#issuecomment-490854408
 2019-05-10 12:59:24 +01:00
John Cupitt
3e60e816ed split heifload / heifsave 
test for libheif supporting decode and encode, and turn heifload and
heifsave on and off
 2019-05-08 21:13:00 +01:00
John Cupitt
b680d9f833 split heifload / heifsave tests 
to allow building with the de265 decoder, but not the GPL ffmpeg x265 encoder
 2019-05-08 20:42:38 +01:00
John Cupitt
d5ca1ddfd4 all tested and working 
revised formula for in/out/dest-in/dest-out, for vector and scalar paths

see https://github.com/libvips/libvips/issues/1301
 2019-05-08 18:16:40 +01:00
John Cupitt
447e0f3ea2 Merge branch 'master' into revise-composite 2019-05-08 16:14:01 +01:00
John Cupitt
3921e63561 fix vips image writes of more than 2gb 
With very wide images and huge numbers of threads, it was possible to
trigger an int overflow in write_vips().

Thanks @erdmann

See https://github.com/libvips/libvips/issues/1306
 2019-05-07 13:56:52 +01:00
John Cupitt
bcdaeca578 fix anim webp load for some sizes 
rounding on resize for each frame needs to match resize for whole image
 2019-05-01 16:34:58 +01:00
John Cupitt
b1c995b2d9 more animated webp load fixes 
webpload scale on load works for animated images
 2019-05-01 16:25:13 +01:00
John Cupitt
37865e34f8 oop silly webp jpg mixup in last commit 2019-04-30 20:07:08 +01:00
John Cupitt
394f9baa5e deprecate webpload @shrink, use @scale instead 
We need a fractional scale for thumbnail on webp to work well. @shrink
still works, but @scale overrides it.
 2019-04-30 18:29:16 +01:00
John Cupitt
ec0b7e7bdf fix pdf test 
for new sizing rules
 2019-04-30 16:24:36 +01:00