We were calling it a sum and looking for a change threshold, but really
it's only useful as a checksum and does not have a magnitude. Revise
comments and variable names to reflect this.
* save GIF palette as metadata
... if there are no local colour tables.
See https://github.com/libvips/libvips/issues/2576
* cgifsave: reuse global palette, if possible
* add reuse_palette parameter
* add reoptimise parameter and reuse palette by default
* attach global palette even if local palettes are present
* add check for presence of use-lct
* Revert "add check for presence of use-lct"
This reverts commit cd0f14e45e8bed8f108ee9666e2569c6355f17eb.
* Revert "attach global palette even if local palettes are present"
This reverts commit 4085b9e14b73c8990e9653ccc6f90477c2a43032.
* move global palette quantization to cgif_build
* rename member variable gct
* update comments
* improve error handling
* update documentation
Co-authored-by: John Cupitt <jcupitt@gmail.com>
This ensures child processes do not inherit open file descriptors
and will close a small but long-standing bug reported against
sharp over five years ago.
The change to lcms2 to support this is backwards compatible so
the flag will be ignored by existing versions.
The fopen 'e' flag will soon be part of the POSIX standard, and
is already supported in Linux and BSD. macOS currently ignores
it but will add support soon. Only Windows has a problem with it,
hence the ifdef wrapper.
* start adding dzsave to a target
made a thing for gsf to write to a target
* fix stray tabs in dzsave
* fix dzsave write to "."
Early versions of libgsf did not support writing to ".", so we had an ugly
workaround, but this should now be OK.
Fixing this ought to make write to target simple
* dzsave_target compiles
no idea if it works though
* seems to work now
creates stray 0 length files though, very odd
* fix stray files from dzsave
next: save to buffer is returning null
* fix buffer flush in dzsave
all tests pass!
* update changelog
* compiles, but untested
* works, but libtiff needs seek for write
next: add seek methods to target
* add target seek and read
seem to work
next: disc temps for disc output
* add libnsgif COPYING
oops, we were missing the COPYING file
see https://github.com/libvips/libvips/issues/2800
thanks mika-fischer
* tiffsave uses a disc temp if it can
* revise temp target rules
only make a disc temp if we are writing to a filesystem target
* add new target methods to targetcustom
since finish did not return an error code
also make sure we don't call target_end from inside _dispose, since that
can't signal error either
see https://github.com/libvips/libvips/issues/2801
* Allow to modify/create EXIF 2.3 ASCII tags
Make `tag_is_ascii` aware of the EXIF 2.3 ASCII tags that are
available since libexif 0.6.22.
See: https://github.com/kleisauke/net-vips/issues/167
* Fix CI
