- Add 'scratch' field to gif that holds temporary 'scratch buffer' used for rendering frames
- For DISPOSE_BACKGROUND: Set background color to transparent instead of 0
- For DISPOSE_BACKGROUND: Write background pixels into scratch after rendering current frame, so it will be used in next frame
- For DISPOSE_PREVIOUS: Save frames that are not disposed into 'previous' field in gif, when DISPOSE_PREVIOUS is specified start with that previous frame. see http://webreference.com/content/studio/disposal.html
- Add "ANIMEXTS1.0" to Application Extension parser
- Graphic Control Extension parser refactor
- Compare file contents to expected images for animated gifs in foreign tests
The --rotate flag no longer did anything, so add a new --no-rotate flag
connected to the new no-rotate property. --rotate is still there, but
hidden and does nothing.
-o was much easier to remember than -f, so flip back to -o. -f still
works, but is a hidden synonym.
--iprofile, --eprofile were hard to remember. Add --import-profile and
--export-profile synonyms. iprofile / eprofile are still there and still
work, but are hidden.
This GIF has dispose set to DISPOSAL_UNSPECIFIED and seems to mean
transparent.
This patch makes gifload use DISPOSAL_UNSPECIFIED as well as _DO_NOT to
mean reuse previous frame.
Thanks DarthSim.
See https://github.com/libvips/libvips/issues/1543
We were usingh a global lock for metadata changes, but some functions
triggered from callbacks in the metadata hash table could also attempt
to acquire the same mutex, leading to deadlock.
This patch gives metadata change it's own lock. Thanks DarthSim.
See https://github.com/libvips/libvips/issues/1542
So:
vips_break_token( "hello\ world", " " )
Sees a single token, `"hello world"`.
This means you can now do things like:
$ vips arrayjoin "k\ 2.jpg" x.png
Where "k 2.jpg" is a filename containing a space.
See https://github.com/libvips/libvips/issues/1493
Another attempt at fixing crashes on metadata chenage in highly threaded
applications.
Global lock around set, remove and copy metadata. This is crude, but
simple, the performance impact should be small, and ought to resolve the
problem.
We'll do something better for the next version.
see https://github.com/lovell/sharp/issues/1986
We weer minimising sources in the ::minimise handler, but this is called
outside the lock that protects _generate. This patch removes minimise in
this case.
See https://github.com/kleisauke/net-vips/issues/53
We were attempting to load images in new_from_file using the new source
API first, then only falling back to the file loaders if that failed.
However, this meant that we did not respect the priority ordering on
loaders, so openslide iamges (for example) were being loaded by the tiff
loader.
We had a half-baked idea that RGB could mean generic RGB space and sRGB
would mean strict sRGB interpretation.
Unfortunately, this did not work well in practice. For example,
`icc_transform("srgb")` would tag the result as RGB rather than sRGB
(the converter didn't know it was writing sRGB pixels, it just saw
conversion to RGB with an ICC profile), and then later stages would do
unnecessary icc_imports, or worse, fail.
This patch makes RGB and sRGB strict synonyms. If you want to treat an
RGB image as something other than sRGB, you'll need to do it by hand
with the icc_ functions.
See
https://github.com/libvips/pyvips/issues/14446212e92b1 (r34904985)https://github.com/libvips/libvips/issues/1494
During write, we often call vips__exif_update(). This updates the exif
block from the other image metadata prior to save.
Always copy the image before calling this.
See https://github.com/lovell/sharp/issues/1986
sharpen with sigma 0.5 was doing nothing, since the new int precision
rules meant that we generated a point-point convolution.
This patch increases the int precision for sharpen, so we now work with
sigma down to 0.5.
Also: restore input colourspace. Previously, the output image was always
LabS (the computation space for sharpen). Now, it transforms back to the
input space. This is more in line with how other operators work.
Thanks 2h4dl for pointing this out.
See https://github.com/libvips/pyvips/issues/123
there's a problem with out of bounds values, for example:
vips relational_const k2.jpg x.v equal 1000
actually finds pixels == 255, since 1000 is saturated converted to 255
before the test starts.
This patch reworks arithmetic against const values to fix this.
We close loaders early in order to save file handles, and on Windows to
make sure that files can be deleted as soon as possible.
Currently loaders do this by watching the Y coordinate of requests and
freeing the fd when the final line of the file is fetched. This is messy
and does not always work, since there are cases when the final line is
not fetched.
Instead, this patch gets loaders to listen for "minimise" on their
output and close on that. This signal is emitted on all upstream images
whenever a threadpool finishes a scan of an image and is usually used to
trim caches after computation.
See https://github.com/libvips/libvips/issues/1370
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
By default librsvg blocks SVGs > 10MB for security. This patch adds an
"unlimited" flag to remove this check.
We have to switch to using gio to get the librsvg API for this This
needs testing on the platforms we support.
We'll also need to bump the min version of librsvg we require in
configure.ac.
See https://github.com/libvips/libvips/issues/1354
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
We used to try to spot webp images with no alpha and load them as plain
RGB, but it turns out this is difficult to do reliably, especially
for animated images.
This patch simply removes support, so all webp images now load as RGBA.
See https://github.com/libvips/libvips/issues/1351
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.
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
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!
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
