Release 1.8.6 (2008-12-13 Chris Wilson <chris@chris-wilson.co.uk>)
=========================================================
The cairo community is pleased to announce the 1.8.6 release of the
cairo graphics library. This is the third update to cairo's stable
1.8 series and contains a small number of bug fixes (in particular a
few fixes for failures of cairo 1.8.4 on Quartz and PDF, and build fixes for
a couple of backends). This is being released just under a month after
cairo 1.8.4.
We recommend that everyone using cairo upgrade to 1.8.6.
-Chris
Build fixes
-----------
Fix build of DirectFB backend with debugging enabled:
Bug in _cairo_directfb_surface_release_source_image function
http://bugs.freedesktop.org/show_bug.cgi?id=18322
Fix build on OS/2.
Bug fixes
---------
Workaround a mis-compilation of cairo_matrix_invert() that generated invalid
matrices and triggered assertion failures later. The issue was reported by
Peter Hercek.
Invalid computation of the modulus:
https://bugzilla.mozilla.org/show_bug.cgi?id=466258
Invalid referencing of patterns in the Quartz backend:
Failed assertion `CAIRO_REFERENCE_COUNT_HAS_REFERENCE
(&pattern->ref_count)' when using cairo quartz backend
http://bugs.freedesktop.org/show_bug.cgi?id=18632
Invalid references to glyphs after early culling, causing segmentation faults
in the PDF backend:
http://lists.cairographics.org/archives/cairo/2008-December/015976.html
Check for XRender in the XCB backend, or else we may attempt an invalid memory
access:
XCB backend fails with missing render.
https://bugs.freedesktop.org/show_bug.cgi?id=18588
Release 1.8.4 (2008-11-14 Carl Worth <cworth@cworth.org>)
=========================================================
The cairo community is pleased to announce the 1.8.4 release of the
cairo graphics library. This is the second update to cairo's stable
1.8 series and contains a small number of bug fixes, (in particular a
few fixes for build failures of cairo 1.8.2 on various systems). This
is being released just over two weeks after cairo 1.8.2.
We recommend that everyone using cairo upgrade to 1.8.4.
-Carl
Build fixes
-----------
Fix build with older XRender that doesn't define RepeatNone:
Build of xlib backend fails against old XRender (RepeatNone undeclared)
https://bugs.freedesktop.org/show_bug.cgi?id=18385
Fix build with bash version <= 3.0:
doltlibtool broken on linux with bash 3.00.0
https://bugs.freedesktop.org/show_bug.cgi?id=18363
Bug fixes
---------
Avoid triggering a bug in X.org server 6.9 resulting in a hung machine
requiring a reboot:
https://bugs.freedesktop.org/show_bug.cgi?id=15628#c2
Fix display of user fonts as exercised by proposed support for type3
fonts in poppler (unsigned promotion fixes):
Use cairo user-font for Type 3 fonts
http://lists.freedesktop.org/archives/poppler/2008-October/004181.html
Avoid miscomputing size of fallback images required when rendering
with CLEAR, IN, or SOURCE operator to vector surfaces, (PS, PDF, SVG,
etc.).
Be more tolerant of broken fonts when subsetting type1 fonts:
Error handling in cairo_type1_font_subset_get_glyph_names_and_widths
http://lists.cairographics.org/archives/cairo/2008-October/015569.html
Fix cairo_fill_extents, cairo_stroke_extents, cairo_path_extents, to
correctly allow NULL parameters as documented.
Fix potential crash on emitting a type3 glyph after having drawn text
paths from the same font, (for example with cairo_text_path).
Release 1.8.2 (2008-10-29 Carl Worth <cworth@cworth.org>)
=========================================================
The cairo community is pleased to announce the 1.8.2 release of the
cairo graphics library. This is the first update to cairo's stable 1.8
series and contains a large number of bug fixes. It is being released
just over one month since cairo 1.8.0.
This release consists primarily of bug fixes, but there is one notable
new feature, (the ability to build cairo without an external font
backend), and there are a few optimizations as well. See below for
details on these changes and the most important bug fixes.
While many people have contributed to this release, Chris Wilson
deserves particular mention. He has contributed well over twice as
many changes to cairo since 1.8.0 than everyone else combined. We
greatly appreciate the tremendous efforts of Chris and all cairo
contributors.
We recommend everyone upgrade to cairo 1.8.2 and hope that everyone
will have lots of fun with cairo!
-Carl
New feature
-----------
It is now possible to build cairo without any font backend, (such as
freetype, win32 or quartz). This is most useful when the application
provides custom font rendering through the user-font API. But in the
case where no external font backend is available, and no user-font is
provided, cairo will render with a failsafe font, (a stroked font
covering visible ASCII character). (Behdad Esfahbod)
Optimizations
-------------
Dramatically speed up compilation with dolt (removes much of the
libtool overhead) (Behdad Esfahbod with thanks to Josh Triplett).
Several minor optimizations to tessellator (special-cased comparisons,
faster insert for skiplist, etc.) (Chris Wilson).
Optimize away fractional translation component when doing
EXTEND_NEAREST filtering, (for better performance).
General bug fixes
-----------------
Allow cloning sub-regions of similar surfaces to fix this bug
(Chris Wilson):
Crafted gif file will crash firefox
[XError: 'BadAlloc (insufficient resources for operation)']
https://bugzilla.mozilla.org/show_bug.cgi?id=424333
Fix some matrix confusion to fix this regression (Chris Wilson):
Translucent star exports in a wrong way to PDF
https://bugs.launchpad.net/inkscape/+bug/234546
Fix some long-standing bugs with respect to properly computing the
extents of transformed, filtered surfaces (Owen Taylor, Carl Worth,
and Chris Wilson):
Bad clipping with EXTEND_NONE
http://bugs.freedesktop.org/show_bug.cgi?id=15349
Improve filtering handling in cairo-pattern.c
http://bugs.freedesktop.org/show_bug.cgi?id=15367
Many thanks to Chris Wilson for digging out and cleaning up
these fixes.
Fix compilation on Solaris 10 (Chris Wilson):
Cairo requires -DREENTRANT (along with -D_POSIX_THREAD_SEMANTICS)
to compile on Solaris 10 with pthreads
https://bugs.freedesktop.org/show_bug.cgi?id=18010
Fix very old bug causing dashes to be rendered at the wrong length in
fallback images (Adrian Johnson)
Dashed strokes too long in fallback images
https://bugs.freedesktop.org/show_bug.cgi?id=9189
Fix broken dashing when a dashed path starts outside the clip region
(Chris Wilson).
Avoid range overflow when computing large patterns (Benjamin Otte and
Chris Wilson).
Avoid crashing due to an invalid font with an incorrect entry in its
CMAP table (Adrian Johnson).
Fix bugs in computing maximum size of text requests that can be sent
with the Render extension, (avoiding potential crashes when rendering
large amounts of text) (Behdad Esfahbod and Chris Wilson).
Fix rendering of operators unbounded by the mask (Chris Wilson).
Fix compilation on systems without compiler support for a native
64-bit type (Chris Wilson).
Fix several cases of missing error-status propagation. (Chris Wilson,
doing the work he seems to never tire of).
Fix several locking issues found with the lockdep valgrind skin (Chris
Wilson).
Backend-specific bug fixes
--------------------------
xlib: Avoid crash due to attempting XRender calls on pixmaps with
formats not supported by the Render extension (Chris Wilson):
XRender crashes due to NULL pointer from Cairo on SGI O2
https://bugs.freedesktop.org/show_bug.cgi?id=1173
xlib: Add support for XImages with depth of 4, 20, 24, or 28 bits
(Chris Wilson):
cairo doesn't support 24 bits per pixel mode on X11
https://bugs.freedesktop.org/show_bug.cgi?id=9102
xlib: Avoid mistakenly considering two surfaces as similar just
because their depths match (while their Render formats do not) (Karl
Tomlinson).
ps: Fix slight mis-scaling of bitmapped fonts (Adrian Johnson)
svg: Correctly emit comp-op for paint, mask, and show_glyphs
operations (Emmanuel Pacaud).
svg: Use finer-grained fallbacks for SVG 1.2 (as PS and PDF backends
have been doing since 1.6.0) (Chris Wilson).
from the announcement:
The dominant theme of this release is improvements to cairo's ability
to handle text. The highlights include a new "user fonts" feature as
well as a new cairo_show_text_glyphs API which allows glyphs to be
embedded in PDF output along with their original text, (for searching,
selection, and copy-and-paste). Another major feature is a revamp of
cairo's build system making it much easier to build cairo on various
platforms.
output at the end of the write and this was restored with 1.2.30, but
cairo didn't override the flush function, resulting in fflush on a
non-stream. This in turn resulted in crashes of graphviz when compiling
doxygen. Bump revision.
Major changes between the 1.4 and 1.6 branch:
- Now uses external "pixman" library instead of a bundled one.
- Improvements to PDF, SVG and PostScript output
- New support for arbitrary X server visuals
(the 8-bit display support patch (patch-ae in pkgsrc) is integrated)
- rendering backend improvements
- various new API additions, while maintaining ABI compatibility
- New Quartz backend
- bug fixes
Release 1.4.12 (2007-11-26 Carl Worth <cworth@cworth.org>)
==========================================================
This is the sixth update in cairo's stable 1.4 series. It comes five
months after the 1.4.10 release. This fix includes various bug fixes
originally developed during the 1.5.x development and backported to
1.4.
Some of the most significant bug fixes prevent crashes:
* Avoid overflow when allocating large buffers (Vladimir Vukicevic)
* Fix crash with cairo_pattern_set_user_data (Carl Worth)
* Fix broken locking in cairo-ft error path (Chris Wilson)
* Avoid crash when cleaning up after Render extension (Carl Worth)
* Avoid crash for zero-sized bitmap glyph (Chris Wilson)
* Avoid crash with type-1 fonts and ft and atsui enabled (Brian Ewins)
* Fix many error-handling cases in the Quartz/ATSUI code (Brian Ewins)
* Eliminate cairo_stroke crash with scaling near zero (Carl Worth)
Other fixes address rendering problems:
* Fix PDF linear gradients without stops at 0.0 and 1.0 (Adrian Johnson)
* Fix PDF CFF subsetting to work with Apple Preview (Adrian Johnson)
* Report proper errors on out-of-memory on win32 (Vladimir Vukicevic)
* Fix EXTEND_NONE gradients for cairo-quartz (Brian Ewins)
* Fix odd-number-of-dashes dashing for cairo-quartz (Brian Ewins)
* Fix erroneous results from cairo_stroke_extents (Carl Worth)
* Force non-AA text when bitmap strikes are available (Keith Packard)
* Fix cairo-atsui font metrics (Richard Hult)
And some avoid raising cairo errors for innocent problems:
* Avoid drawing shutdown for glyph-not-found in font (Behdad Esfahbod)
* Don't raise an error for creating an empty path (Chris Wilson)
At least one optimization managed to sneak in:
* Free glyph surfaces after uploading to X server cache (Behdad Esfahbod)
And there are a few very minor fixes, (such as build fixes).
changes:
The most significant
change in this release is a fix to avoid an X error in certain cases,
(that were causing OpenOffice.org to crash in Fedora). There is also a
semantic change to include child window contents when using an xlib
surface as a source, an optimization when drawing many rectangles, and
several minor fixes.
This is the fourth update in cairo's stable 1.4 series. It comes just
over five weeks after the 1.4.6 release. This release includes a
thread-safe surface-cache for solid patterns which significantly
improves text rendering with the xlib backend. Also, dozens of error
paths in cairo have been fixed thanks to extensive fault-injection
testing by Chris Wilson.
Release 1.4.6 (2007-05-01 Carl Worth <cworth@cworth.org>)
=========================================================
This is the third update in cairo's stable 1.4 series. It comes a
little less than three weeks since the 1.4.4 release. This release
fixes the broken mutex initialization that made cairo 1.4.4 unusable
on win32, OS/2, and BeOS systems. This release also adds significant
improvements to cairo's PDF backend, (native gradients!), and a couple
of performance optimizations, (one of which is very significant for
users of the xlib backend).
Release 1.4.4 (2007-04-13 Carl Worth <cworth@cworth.org>)
=========================================================
This is the second update release in cairo's stable 1.4 series. It
comes just less than a month after 1.4.2. The changes since 1.4.2
consist primarily of bug fixes, but also include at least one
optimization. See below for details.
There have been lots of individuals doing lots of great work on cairo,
but two efforts during the 1.4.4 series deserve particular mention:
Internal cleanup of error handling, (Chris Wilson)
--------------------------------------------------
Chris contributed a tremendous series of patches (74 patches!) to
improve cairo's handling of out-of-memory and other errors. He began
by adding gcc's warn_unused_attribute to as many functions as
possible, and then launched into the ambitious efforts of adding
correct code to quiet the dozens of resulting warnings.
Chris also wrote a custom valgrind skin to systematically inject
malloc failures into cairo, and did all the work necessary to verify
that cairo's performance test suite runs to completion without
crashing.
The end result is a much more robust implementation. Previously, many
error conditions would have gone unnoticed and would have led to
assertion failures, segmentation faults, or other harder-to-diagnose
problems. Now, more than ever, cairo should cleanly let the user know
of problems through cairo_status and other similar status
functions. Well done, Chris!
More malloc reduction, (Mathias Hasselmann)
-------------------------------------------
After 1.4.0, Behdad launched an effort to chase down excessive calls
to malloc within the implementation of cairo. He fixed a lot of
malloc-happy objects for 1.4.2, but one of the worst offenders,
(pixman regions), was left around. Mathias contributed an excellent
series of 15 patches to finish off this effort.
The end result is a cairo that calls malloc much less often than it
did before. Compared to 1.4.2, 55% of the calls to malloc have been
eliminate, (and 60% have been eliminated compared to 1.4.0). Well
done, Mathias!
This switches to the new stable branch. Too many changes to list here,
see the changelog.
Most notably: speed improvements, PDF output improvement, API additions,
bugfixes.
I still know that it was necessary for some package, but I don't
remember which one and on which platform, and even the CVS log message
doesn't give any useful information.
-remove dependency on libpixman which was stale for ages
-don't bother setting the gtk-doc installation path to share/doc,
the new "devhelp" will find it at the default location (and the
previous versions didn't find it at share/doc either)
Release 1.2.2 (2006-08-08 Carl Worth)
=========================================================
This is the first bug fix release in the 1.2 series since the original
1.2.0 release made six weeks ago.
There were some very serious bugs in the 1.2.0 release, (see below),
so everybody is encouraged to upgrade from 1.2.0 to 1.2.2. The 1.2.2
release maintains source and binary compatibility with 1.2.0 and does
not make any API additions.
Fix crashes with BGR X servers
------------------------------
With cairo 1.2.0 many people reported problems with all cairo-using
programs, (including all GTK+ programs with GTK+ >= 2.8) immediately
crashing with a complaint about an unsupported image format. This bug
affected X servers that do not provide the Render extension and that
provide a visual with BGR rather than RGB channel order.
report: https://bugs.freedesktop.org/show_bug.cgi?id=7294
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=9ae66174e774b57f16ad791452ed44efc2770a59
Fix the "disappearing text" bug
-------------------------------
With cairo 1.2.0 many people reported that text would disappear from
applications, sometimes reappearing with mouse motion or
selection. The text would disappear after the first space in a string
of text. This bug was caused by an underlying bug in (very common) X
servers, and only affected text rendered without antialiasing, (either
a bitmap font or a vector font with antialiasing disabled). The bug
was also exacerbated by a KDE migration bug that caused antialiasing
to be disabled more than desired.
report: https://bugs.freedesktop.org/show_bug.cgi?id=7494
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=456cdb3058f3b416109a9600167cd8842300ae14
see also:
Xorg: https://bugs.freedesktop.org/show_bug.cgi?id=7681
KDE: http://qa.mandriva.com/show_bug.cgi?id=23990
Fix broken image fallback scaling (aka. "broken printing")
----------------------------------------------------------
The various "print" backends, (pdf, ps, and svg), sometimes fallback
to using image-based rendering for some operations. In cairo 1.2.0
these image fallbacks were scaled improperly. Applications using cairo
can influence the resolution of the image fallbacks with
cairo_surface_set_fallback_resolution. With the bug, any calue other
than 72.0 would lead to incorrect results, (larger values would lead
to increasingly shrunken output).
report: https://bugs.freedesktop.org/show_bug.cgi?id=7533
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=1feb4291cf7813494355459bb547eec604c54ffb
Fix inadvertent semantic change of font matrix translation (Behdad Esfahbod)
----------------------------------------------------------------------------
The 1.2.0 release introduced an inadvertent change to how the
translation components of a font matrix are interpreted. In the 1.0
series, font matrix translation could be used to offset the glyph
origin, (though glyph metrics were reported incorrectly in
1.0). However in 1.2.0, the translation was applied to the advance
values betwen each glyph. The 1.2.0 behavior is fairly useless in
practice, and it was not intentional to introduce a semantic
change. With 1.2.2 we return to the 1.0 semantics, with a much better
implementation that provides correct glyph metrics.
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=84840e6bba6e72aa88fad7a0ee929e8955ba9051
Fix create_similar to preserve fallback resolution and font options (Behdad Esfahbod)
-------------------------------------------------------------------------------------
There has been a long-standing issue with cairo_surface_create_similar
such that font options and other settings from the original
destination surface would not be preserved to the intermediate
"similar" surface. This could result in incorrect rendering
(particulary with respect to text hinting/antialiasing) with
fallbacks, for example.
report: https://bugs.freedesktop.org/show_bug.cgi?id=4106
fixes: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=9fcb3c32c1f16fe6ab913e27eb54d18b7d9a06b0http://gitweb.freedesktop.org/?p=cairo;a=commit;h=bdb4e1edadb78a2118ff70b28163f8bd4317f1ec
xlib: Fix text performance regression from 1.0 to 1.2.0 (Vladimir Vukicevic)
----------------------------------------------------------------------------
Several people noticed that upgrading from cairo 1.0 to cairo 1.2.0
caused a significant peformance regression when using the xlib
backend. This performance regression was particularly noticeable when
doing lots of text rendering and when using a high-latency connection
to the X server, (such as a remote X server over an ssh
connection). The slowdown was identified and fixed in 1.2.2.
report: https://bugs.freedesktop.org/show_bug.cgi?id=7514
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=b7191885c88068dad57d68ced69a752d1162b12c
PDF: Eliminate dependency on FreeType library dependency (Adrian Johnson)
-------------------------------------------------------------------------
The cairo 1.2 series adds a supported pdf backend to cairo. In cairo
1.2.0 this backend required the freetype library, which was an
undesirable dependency on systems such as win32, (cairo is designed to
always prefer the "native" font system). As of cairo 1.2.2 the
freetype library is not required to use the pdf backend on the win32
platform.
report: https://bugs.freedesktop.org/show_bug.cgi?id=7538
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=a0989f427be87c60415963dd6822b3c5c3781691
PDF: Fix broken output on amd64 (Adrian Johnson)
------------------------------------------------
report: http://bugzilla.gnome.org/show_bug.cgi?id=349826
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=f4b12e497b7ac282b2f6831b8fb68deebc412e60
PS: Fix broken output for truetype fonts > 64k (Adrian Johnson)
---------------------------------------------------------------
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=067d97eb1793a6b0d0dddfbd0b54117844511a94
PDF: Fix so that dashing doesn't get stuck on (Kent Worsnop)
------------------------------------------------------------
Kent notices that with the PDF backend in cairo 1.2.0 as soon as a
stroke was performed with dashing, all subsequent strokes would also
be dashed. There was no way to turn dashing off again.
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=778c4730a86296bf0a71080cf7008d7291792256
Fix memory leaks in failure paths in gradient creation (Alfred Peng)
--------------------------------------------------------------------
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=db06681b487873788b51a6766894fc619eb8d8f2
Fix memory leak in _cairo_surface_show_glyphs (Chris Wilson)
------------------------------------------------------------
report: https://bugs.freedesktop.org/show_bug.cgi?id=7766
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=e2fddcccb43d06486d3680a19cfdd5a54963fcbd
Solaris: Add definition of cairo_private for some Sun compilers (Alfred Peng)
-----------------------------------------------------------------------------
report: https://bugzilla.mozilla.org/show_bug.cgi?id=341874
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=04757a3aa8deeff3265719ebe01b021638990ec6
Solaris: Change version number of Sun's Xorg server with buggy repeat (Brian Cameron)
-------------------------------------------------------------------------------------
report: https://bugs.freedesktop.org/show_bug.cgi?id=7483
fix: http://gitweb.freedesktop.org/?p=cairo;a=commit;h=e0ad1aa995bcec4246c0b8ab0d5a5a79871ce235
Various memory leak fixes
-------------------------
Fix memory leak in _cairo_surface_show_glyphs (bug 7766)
Fix file handle leak in failure path (bug 7616)
Fix some memory leaks in the test cases.
Fix some memory leaks in font subsetting code used in print backends.
Documentation improvements (Behdad Esfahbod)
--------------------------------------------
Added new documentation for several functions (cairo_show_page,
cairo_copy_page, cairo_in_stroke, cairo_in_fill).
Fixed some syntax errors that were preventing some existing
documentation from being published.
Fixed several minor typographical errors.
Added an index for new symbols in 1.2.
