Release 1.14.6    (2015-12-09  Bryce Harrington <bryce@osg.samsung.com>)
========================================================================
Simple bugfix release to fix one Windows issue.

For a complete log of changes since 1.14.4, please see:

    http://cairographics.org/releases/ChangeLog.1.14.6

Features
--------
None

API Changes
-----------
None

Dependency Changes
------------------
None

Performance Optimizations
-------------------------
None

Bug Fixes
---------
* Fix failure on Windows due to reference of the function
  cairo_win32_surface_create_with_format(), which isn't included in the
  1.14.4 release. (Bug #92771)


Release 1.14.4    (2015-10-28  Bryce Harrington <bryce@osg.samsung.com>)
========================================================================
Just in time for Halloween we see another bug-fix release for Cairo.
This brings a few dozen straightforward bug fixes with no API changes.

In addition, this includes a typical assortment of fixes to tests,
cleanup of warnings and memory leaks, correction of misspellings,
updates to documentation, etc.

For a complete log of changes since 1.14.2, please see:

    http://cairographics.org/releases/ChangeLog.cairo-1.14.4


Features
--------
None

API Changes
-----------
None

Dependency Changes
------------------
None

Performance Optimizations
-------------------------
None

Bug Fixes
---------
* Avoid appending empty slots to user data arrays.  Fixes a memory
  consumption regression since commit 9341c254a.

* Return a better error (file-not-found) when setting up pango on
  devices where the font files don't have read permissions.

* Fix regression in the font size of canvas text in Inkscape when
  compiled with the Quartz backend.  (Bug #84324)

* Fix _cairo_gl_shader_bind_matrix() to maintain compatibility with
  OpenGL ES 2.0.  Manually transpose the matrix.

* Fix incorrect font descriptor conversion when the font matrix yy is
  negative. (Bug #90538)

* Fix crash when using a complex path for clip and stroke due to
  discarding the intersection exactly at the top edge.
  (Bug #74779)

* Fix cairo_get_locale_decimal_point() on Android

* Fix compilation problem on AIX due to conflicting usage of symbol
  'jmpbuf'.  (Bug #89339)

* Fix broken rendering with XCB due to snapshotting of uploaded part of
  surfaces.  (Bug #67505)

* Fix loss of alpha when copying a mask for a cairo recording surface,
  resulting in a double copy.  (Bugs #73038, #73901)

* Fix incorrect recording of certain paths with script surfaces.
  (Bug #91054)

* Fix typo in definition of MAYBE_WARN in configure script.
  (Bug #89750)

* Fix use of filename variable after it's been freed.
  (Bug #91206)

* Fix out of bounds access when printing pattern.
  (Bug #91266)

* Fix incorrect size calculation in glyph cache unlocking for Cairo GL
  compositor.
  (Bug #91321)

* Fix memory leak in _cairo_gl_pattern_texture_setup()
  (Bug #91537)

* Fix transparent images in win32-print.
  (Bug #91835)

* Fix _put_shm_image_boxes and _put_image_boxes when no SHM available
  with XCB.


Release 1.14.2 (2014-03-09 Bryce Harrington <bryce@osg.samsung.com>)
====================================================================
This release provides collected bug fixes, along with one feature
enhancement for the xcb backend, and a small performance improvement for
fonts.

The running theme of the bug fixes is platform-specific issues, both
build and run-time.  Platforms with fixes include Sparc, AIX, Windows
(mingw), and Windows (MSVC8).  Memory leaks, valgrind issues, and PDF
issues round out our list.

It's come to light that changes in cairo 1.14 resulted in breakage on
MacOS X 10.4.  We've not yet determined whether to fix up the support,
or excise the 10.4-specific code and support only OS X 10.5 or newer.
Meantime, we'll only advertise cairo as working on OS X 10.5.

Features
--------
 * Improve xcb's handling of per-screen subpixel ordering.  If no
   Xft.rgba property is specified, default to the screen's subpixel
   order.

API Changes
-----------
None

Dependency Changes
------------------
None

Performance Optimizations
-------------------------
 * Improve performance of cpu_to_be32 and be32_to_cpu, making truetype
   subsetting of large fonts run about 15% faster.

Bug Fixes
---------
 * Fix unaligned access on sparc with the compact font format (CFF).
   Unlike truetype, all data in CFF is not aligned.
   (Debian bug #712836)
 * Fix unaligned access on sparc with tor-scan-converter's memory pool.
 * Fix crash when loading a PDF with a transformed image.
   (fdo bug #85151)
 * Fix regression on mingw for bigendian test due to removal of file
   extension for executables.
   (fdo bug #85120)
 * Fix handling of backslash in PDF interpreter
   (fdo bug #85662)
 * Fix crash in xlib and xcb renderers when swapping a 0-sized glyph
 * Fix bug with RTL text in PDF operators
   (fdo bug #86461)
 * Fix compilation 'cairo-path-stroke-traps.c' with MSVC8
   (fdo bug #84908)
 * Fix crash in _fill_xrgb32_lerp_opaque_spans when a span length is
   negative.
 * Fix valgrind error by releasing pattern created by
   cairo_pattern_create_rgb().
 * Fix valgrind errors when running cairo-test-suite.
 * Fix memory leak in recording surface replays
   (fdo bug #87898)
 * Fix destruction of fonts in api-special-cases test.
   (fdo bug #87567)
 * Fix duplicated surface push on similar-image, preventing trivial GTK3
   program traces from being replayable, with an error message about
   invalid values for the size of the input.
   (fdo bug #73580)
 * Fix crash when win32 surface's image size does not cover the entire
   surface.
   (fdo bug #53121)
 * Fix crash due to obsolete CGFontGetGlyphPath call
   (fdo bug #84324)
 * Fix several build issues on AIX
   (fdo bugs #89338, #89340, #89356, #89354)
 * Fix various documentation warnings and errors

Release 1.14.0 (2014-10-13 Bryce Harrington <bryce@osg.samsung.com>)
====================================================================
Hard to believe it's been over a year since our last release, but it's
not for lack of activity.  This release includes contributions of a wide
assortment of bug fixes, build system improvements, warnings cleanups,
codebase refactoring, test suite repairs, and static analysis work.

This release is lighter on features (compared with 1.12.10) but includes
a highly demanded rehaul of our image downscaling functionality, which
solves a serious problem experienced by Inkscape users when shrinking
embedded bitmaps in SVG files.  The new scaling algorithms are used by
the image backend and by other backends as needed for fallbacks.


Features
--------

  Filtering improvements for the image backend, in particular
  down-scaling of images produces filtered images that depend on all the
  pixels of the source. When using the image backend you get the
  following settings:

  CAIRO_FILTER_GOOD: uses a box filter for scales less than .75 in
    either direction. For scales larger than this, the same filter as
    CAIRO_FILTER_BILINEAR is used.

  CAIRO_FILTER_BEST: uses a Catmull-Rom filter always. When upscaling
    more than 2x this will produce anti-aliased square pixels, similar
    to OS/X.

  CAIRO_FILTER_GAUSSIAN: uses PIXMAN_FILTER_BEST, which in current
    pixman is the same as BILINEAR. (This is subject to change in the
    future).

  xlib and xcb also use the image fallback for GOOD/BEST filters, but
  note that other backends do not implement these filtering fixes yet,
  however other actions may cause them to use an image fallback which
  will cause these filters to be used.

  Improve handling of device transformation and scaling, allowing Cairo
  to now support scaling at a device level, permitting easier, more
  transparent HiDPI support.

  Support JBIG2 mime data in PDF.  This allows embedding of more
  compressed JPEG formats within PDF, rather than including the full
  uncompressed image.  Also, reduce the number of transparency groups
  used by PDF to keep the file size small and viewing/printing of the
  PDF fast.

  Expand the embedding section to include stencil mask support.

  Reorder font declarations to be in natural order.

  Update the Skia backend to build against current Skia (as of June
  2014).

  Drop Link-Time Optimization (LTO) support from build system.  This
  seems to have caused much trouble for unclear benefit, and most
  distros are reverting or disabling it anyway.

  Optimize VBO size on GL to 1M and to 16k for EGL.  This improves
  (theoretical) performance for desktop GLX use cases while avoiding
  hitting VBO memory size limitations on embedded devices.

API Changes
-----------

  cairo_surface_set_device_scale, cairo_surface_get_device_scale:

    Sets a scale that is multiplied to the device coordinates
    determined by the CTM when drawing to @surface. One common use for
    this is to render to very high resolution display devices at a scale
    factor, so that code that assumes 1 pixel will be a certain size
    will still work.

  cairo_egl_device_get_display, cairo_egl_device_get_context:

    Support get/set of EGLContext and EGLDisplay for egl-based cairo
    devices, similar to GLX.

Dependency Changes
------------------

  Cairo now requires glib 2.14 for its gobject helper functions,
  and pixman 0.30 for downscaling.


Bug fixes
---------

  Don't embed CMYK Jpeg images in svg.

  Fix tests to place output in proper location.

  Fix determination of alpha for all surfaces when recording.

  Extend oversize check to cairo_gl_surface_create_for_texture, so an
  error surface is returned if the texture is too large to render to.

  Fix embedding of mime data in PDF and PS files.

  Remove useless error handling in *_reply() functions in XCB.

  Fix a double-free exposed by multithreaded apps creating and
  destroying the same font concurrently.
  https://bugs.freedesktop.org/show_bug.cgi?id=69470

  Fix corrupt stacks produced by bugs in operand emission for trace.

  Fix out of bounds array access in format cache for xlib

  Don't rename glyphs used by seac operator.  This can cause certain
  combined characters to use their decorations (e.g. umlauts on ö) to be
  lost during printing of PDFs using evince.
  https://bugs.freedesktop.org/show_bug.cgi?id=70364

  Fix crash on calling cairo_create with a finished surface

  Fix SSIZE_T definition problem when making with MSYS on Windows7

  Fix one off issue in gl context cleanup

  Fix usage of CAIRO_STACK_ARRAY_LENGTH

  Fix rectangle stroke with non rectilinear pen

  Fix imagemask with pattern source failure on some printers.  This bug
  could cause files converted using pdftops to fail for example on Ricoh
  printers, or opening in Adobe Distiller on Windows.
  https://bugs.freedesktop.org/show_bug.cgi?id=69485

  Fix whitespace in font names

  Fix page size in generated PDFs.  When printing using pdftocairo on
  larger page sizes, such as 11x17, the image would be cropped to letter
  size.
  https://bugs.freedesktop.org/show_bug.cgi?id=73452

  Fix path-currentpoint test by preserving current-point in
  copy_path()/append_path() sequence

  Fix generation of HTML in code docs for
  cairo-format-stride-for-width.  Raw HTML code was being passed
  to the browser, instead of displaying normally.
  https://bugs.freedesktop.org/show_bug.cgi?id=63257

  Fix spelling of "tessellator" throughout code.  We're using the
  American rather than British spelling of this word.
  https://bugs.freedesktop.org/show_bug.cgi?id=50411

  Fix crash in pixman_image_composite32

  Fix crash when trying to modify a (const) all-clipped cairo_clip_t
  https://bugs.freedesktop.org/show_bug.cgi?id=75819

  Add check_composite method to all compositors, to fix crashes in the
  test suite.

  Fix crash in Firefox when scrolling on certain pages.

  Fix memory leaks found by static analysis.

  Fix build of any2ppm if fork is not available.

  Fix broken build for Qt backend, due to missing libstdc++.

  Fix typo in two cairo_uint128 functions.  Fixes potential build issues
  on systems without a uint128 type.

  Fix build when --enable-pdf=no

  Fix cache_frozen assertions for Win32 print.

  Correctly check for xcb image surface for inplace upload

  Fix webkit-based web browser crashes due to empty boxes by skipping
  over them when tesselating.

  Make pixman, libpng, and zlib paths commandline configurable for win32
  builds.

  Fix image scale on Win32 when GDI scale is not identity.

  Fix float endian configure test when using clang -O4

  Fix compilation with Android bionic libc

  Don't try to build util/sphinx on Windows

  Fix loss of precision when emitting joins.  This was caused by
  discrepancies in line gradients when passing trapezoids around.

  Fix loss of precision and associated rendering issues in
  cairo-tor-scan-converter from projection onto sample grid.

  Fix pixman oversampling of neighbouring edges within a cell by
  eliminating self-intersections for the pixman traps compositor.

  Fix multi-line string splitting in PDFs

  Various cleanups and fixes to warnings, documentation, tests, and
  build system.  Improve error handling and return value checks.
  Cleanup XFAIL tests and reference images.  Cover recently added
  functionality.


Release 1.12.16 (2013-08-21 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
Thanks to everybody who reported a bug and helped us develop a fix,
we have amassed quite a few bug fixes. There are still more outstanding
bugs that seek attention and a little bit of TLC, but this release has
been delayed long enough...

Bug fixes
---------

  Set the correct orientation for simple boxes with a negative scale
  factor.

  Fix the creation of the shading dictionary in PDF.

  Fix a crash in PDF when incorporating an image with CAIRO_EXTEND_PAD.
  https://bugs.freedesktop.org/show_bug.cgi?id=61451

  Avoid upscaling bitmap fonts if possible.

  Fix an assertion failure within the mempool allocator for shared memory.

  Fix allocation size for CFF subsets.

  Export cairo_matrix_t for GObject bindings.

  Fix a double free in the Quartz backend.
  https://bugs.freedesktop.org/show_bug.cgi?id=62885

  Fix origin of GDI StretchBlits for the Windows backend
  https://bugs.freedesktop.org/show_bug.cgi?id=61876

  Fix error propagation for requests to create a similar surface with
  negative size.
  https://bugs.freedesktop.org/show_bug.cgi?id=63196

  Fix complex clipping of trapezoids with regions
  https://bugzilla.gnome.org/show_bug.cgi?id=697357

  Stop leaking the image data when loading PNGs

  Fix unbounded operations with a clip mask through the span compositor
  https://bugs.freedesktop.org/show_bug.cgi?id=61592

  Add missing checks before rendering to a finished surface - so we return
  an error rather than hit an assert.
  https://bugs.freedesktop.org/show_bug.cgi?id=68014

  Prevent an assertion failure when creating similar GL surfaces larger
  than supported by hardware.

  Prevent a double free of a similar image under Windows.
  https://bugs.freedesktop.org/show_bug.cgi?id=63787


Release 1.12.14 (2013-02-10 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
In the last week we had a few more bugs reported and promptly resolved.
As these are a combination of regressions and stability issues, it is
time for a prompt update and release. Many thanks to everyone for
testing and reporting issues, and helping to make Cairo better.

Bug fixes
---------

  Prevent user callbacks accessing user-data during destroy to prevent
  use-after-free bugs.
  https://bugzilla.mozilla.org/show_bug.cgi?id=722975

  Use standard names for glyphs in subset fonts (PDF).
  https://bugs.freedesktop.org/show_bug.cgi?id=60248

  Fix detection of Win98. The logic for detecting Win98 (and its broken
  AlphaBlend()) was inverted, disabling AlphaBlend() for everyone.

  Prevent numeric overflow from extrapolating polygon edges to the clip
  boundary and causing severe render artifacts.
  https://bugs.freedesktop.org/show_bug.cgi?id=60489

  Fix computation of glyph string coordinates when breaking up runs
  for xlib.

  Fix an assertion in the win32 backend for failing to clear its
  similar-images.
  https://bugs.freedesktop.org/show_bug.cgi?id=60519


Release 1.12.12 (2013-01-31 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
The goal of this release is to fix the synchronisation problems that
were exhibited in the SHM transport for cairo-xlib. This cropped up
any place that tried to rapidly push fresh pixel data to the X server
through an ordinary image surface, such as gimp-2.9 and evince.

Bug fixes
---------

   Avoid replacing the entire image when uploading subimages
   https://bugs.freedesktop.org/show_bug.cgi?id=59635

   Force synchronisation for scratch SHM image buffers, so that we do
   not overwrite data as it is being read by X.
   https://bugs.freedesktop.org/show_bug.cgi?id=59635 (also)

   Fix typos in detecting multisampling for the GL (MSAA) backend.

   Fix a memory leak in the GL (MSAA) backend.

   Fix a reference counting bug when mapping a GL surface to an image.


Release 1.12.10 (2013-01-16 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
A heap of bug fixes everywhere, and the gradual completion of the MSAA
backend for cairo-gl. Perhaps the most noteworthy set of the bugfixes
was the crusage lead by Behdad Eshfabod to make font handling by
pango/cairo/fontconfig fully threadsafe. This testing revealed a couple
of races that needed fixing in Cairo's scaled-font and glyph cache.

Bug fixes
---------

  Append coincident elements to the recording's surface bbtree so that
  the list is not corrupted and the overlapping elements lost.

  Fix cairo-trace to correctly record map-to-image/unmap-image and then
  replay them.

  Ignore MappingNotifies when running the XCB testsuite as they are sent
  to all clients when the keyboard changes. The testsuite would detect
  the unexpected event and complain.

  Handle very large images in the XCB backend.

  Fix a memory leak in the xlib/shm layer, and prevent use of the SHM
  surfaces after the display is closed.
  https://bugs.freedesktop.org/show_bug.cgi?id=58253

  Handle resizing of bitmap fonts, in preparation for a fix to
  fontconfig to correctly pass on the user request for scaling.

  Always include subroutine 4 (hint replacement idion) when subsetting
  type 1 fonts in order to prevent a crash in cgpdftops on Mac OS/X

  Fix a couple of typos in the cairo-gobject.h header files for
  introspection.

  Prevent a mutex deadlock when freeing a scaled-glyph containing a
  recording-surface that itself references another scaled-glyph.
  https://bugs.freedesktop.org/show_bug.cgi?id=54950

  Make scaled-font cache actually thread-safe and prevent
  use-after-frees.

  Restore support for older versions of XRender. A couple of typos and a
  few forgotten chunks prevented the xlib compositor from running
  correctly with XRender < 0.10. Note that there are still a few
  regressions remaining.


Release 1.12.8 (2012-11-24 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
Another couple of weeks and a few more bugs have been found and fixed,
it is time to push the next point release. Many thanks to everyone who
reported their issues and helped us track down the bugs and helped
testing the fixes.

Bug fixes
---------

  Expand the sanity checking for broken combinations of XSendEvent and
  ShmCompletionEvent.

  Notice that "The X.Org Foundation" sometimes also identifies itself
  as "The Xorg Foundation".

  Handle various ages of libXext and its Shm headers.

  Fix the invalid clipping of the source drawable when using SHM
  transport to upload images.
  https://bugs.freedesktop.org/show_bug.cgi?id=56547

  Handle all Type1 postscript operators for better font compatibility.
  https://bugs.freedesktop.org/show_bug.cgi?id=56265

  Fix a couple of memory leaks in Type1 font subsetting
  https://bugs.freedesktop.org/show_bug.cgi?id=56566

  Tighten the evaluation of the start/stop pen vertices, and catch a few
  instances where we would use a fan instead of a bevel.
  https://bugs.freedesktop.org/show_bug.cgi?id=56432

  Fix assumption that geometric clipping always succeeds with the
  span-compositor.
  https://bugs.freedesktop.org/show_bug.cgi?id=56574

  Fix call to spline intersection when evaluating whether a stoke is
  visible.

  Remember to copy inferior sources when using SHM to readback the
  surface for use as a source.

Release 1.12.6 (2012-10-22 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
Thanks to everyone who download cairo-1.12.4 and gave us their feedback.
It truly was invaluable and has helped us to fix many portability issues
that crept in with some of the new features. This release aims to fix
those stability issues and run on a wider range of systems.

Bug fixes
---------

  Fix the recording surface to actually snapshot the source and so fix
  PDF drawing.

  Calling XSendEvent with an XShmCompletionEvent is incompatabile with
  older Xorg servers.

  Reorder CloseDisplay chain so that XShm is not reinstantiated after
  shutdown, causing a potential crash if the Display was immediately
  recreated using the same memory address.

  Make sure that the Xserver has attached to the SHM segment before
  deleting it from the global namespace on systems that do not support
  deferred deletion.

  Type1 subsetting support for PDF (and PS) was once again improved to
  work with a larger number of PDF readers.

  GLESv2 build fixes and improved support for embedded GPUs.

  Tweak the invisible pen detection for applications that are currently
  using too large values for geometric tolerance.

  A build fix for older freetype libraries.


Release 1.12.4 (2012-10-05 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
More bugs, and more importantly, more fixes. On the cairo-gl side, we
have refinements to the MSAA compositor which enables hardware
acceleration of comparatively low-quality antialiasing - which is useful
in animations and on very high density screens. For cairo-xlib, we have
finally enabled SHM transport for image transfers to and from the X
server. A long standing required feature, SHM transport offers a notable
reduction in rendering latency by reducing the number of copies
required to upload image data - given hardware and driver support,
cairo-xlib can now perform zero copy uploads onto the GPU. And as usual
Adrian Johnson has been very busy fixing many different corner cases in
cairo-pdf, impoving opacity groups and font subsetting. Last, but not
least, for cairo-image Søren Sandmann Pedersen added support for
rendering glyphs to pixman and using that from within cairo. The new
glyph rendering facility reduces the overhead for setting up the
compositing operation, improving glyph thoughput for the image backend
by a factor of about 4. And before he did so, he also fixed up a few
bugs in the existing glyph rendering code. So many thanks to Andrea
Canciani, Adrian Johnson, Chuanbo Weng, Dongyeon Kim, Henry Song, Martin
Robinson, Søren Sandmann Pedersen and Uli Schlachter for their
contributions, finding and fixing bugs.

Bug fixes
---------

 Interior boxes were being dropped when amalgamating regions during
 tesselation.
 https://bugs.freedesktop.org/show_bug.cgi?id=49446

 Allow building without gtk-doc installed

 Invalid edge generation whilst reducing complex polygons.
 https://bugs.freedesktop.org/show_bug.cgi?id=50852

 Stroking around tight cusps

 Use locale correct formats for reading font subsetting and valid
 buffers.
 https://bugs.freedesktop.org/show_bug.cgi?id=51443

 Ensure that the type1 subset includes all the glyph encodings
 https://bugs.freedesktop.org/show_bug.cgi?id=53040

 Upload the whole source for a repeating pattern.
 https://bugs.freedesktop.org/show_bug.cgi?id=51910

 Fix damage tracking to handle continuation chunks corectly and so
 prevent crashes on win32.
 https://bugs.freedesktop.org/show_bug.cgi?id=53384

 Avoid emitting miter joins for degenerate line segments
 https://bugzilla.mozilla.org/show_bug.cgi?id=407107

 Convert the relative path semgents into the backend coordinates
 and then back again to user coordinates (cairo_copy_path,
 cairo_append_path)
 https://bugs.freedesktop.org/show_bug.cgi?id=54732
 
 Fix extents computations for a degenerate path consisting only of a
 move-to
 https://bugs.freedesktop.org/show_bug.cgi?id=54549

 Prevent crashing on a degenerate project edge after polygon
 intersection
 https://bugs.freedesktop.org/show_bug.cgi?id=54822
 


Release 1.12.2 (2012-04-29 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
After such a long gestation period for the release of Cairo 1.12, we
inevitably accumulated a few bugs that were flushed out by broadening the
test base. Thanks to everybody who tried the release, apologies to any one
unfortunate enough to encounter a bug and many thanks for reporting it. As
a result Adrian Johnson, Alexandros Frantzis, Andrea Canciani, Kalev
Lember, Maarten Bosman, Marcus Meissner, Nis Martensen and Uli Schlachter
have squashed many more bugs and improved the documentation. I would
strongly recommend everyone to upgrade to cairo-1.12.2.
-Chris

Bug fixes
---------

 Allow applications to create 0x0 xlib surfaces, such as used by LibreOffice.
 https://bugs.freedesktop.org/show_bug.cgi?id=49118
 
 Trim composite extents for SOURCE/CLEAR operators to the mask.

 Use fallback fonts in PDF for unhandled computed glyph widths
 https://bugs.freedesktop.org/show_bug.cgi?id=48349

 Handle snapshots of recording surfaces for analysing pattern extents.
 Fixes a regression of reporting the PDF bounding box as being the page size.

 Fix allocation size for PDF pattern ids.
 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49089

 Fix emission of rectilinear dashed segments, with and without scaling, and
 application of degenerate line joins.

 Clamp unbounded fixup polygons to the clip extents.

 Prevent infinite loop due to rounding errors whilst incrementing along dashes.

 Prevent overflow for inline a8 span filling.

 Miscellaneous build fixes for Cygwin on Windows and Solaris.

Release 1.12.0 (2012-03-23 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
It's taken over 18 months, but the wait is finally over. A new cairo release!
We are pleased to annouce a new stable release of Cairo that brings many
new features and performance improvements, all whilst maintaining
compatibility with cairo-1.0 and all releases since. We recommend anyone
using a previous release of Cairo to upgrade to 1.12.0.

The major feature of this release is the introduction of a new procedural
pattern; the mesh gradient. This, albeit complex, gradient is constructed
from a set of cubic Bezier patches and is a superset of all other gradient
surfaces which allows for the construction of incredibily detailed patterns.
In PDF parlance, the mesh gradient corresponds with type 7 patterns. Many
thanks to Andrea Canciani for bringing this to Cairo, and for his work on
making gradient handling robust.

Not content with just adding another procedural pattern, Cairo 1.12 also
adds new API to create a callback pattern,
cairo_pattern_create_raster_source, that allows the application to
provide the pixel data for the region of interest at the time of
rendering. This can be used for instance, by an application to decode
compressed images on demand and to keep a cache of those decompressed
images, independently of Cairo. When combined with the recording
surface, it should form a useful basis for a deferred renderer.

With the release of cairo-1.12, we also introduce a new supported
backend for interoperating with X using XCB. Uli Schlachter, also
maintainer of awesome and contributor to libxcb, has volunteered to
maintain cairo-xcb for us. Thanks Uli!

For cairo-1.12, we have also added some common API to address any
surface as an image and so allow direct modification of the raster data.
Previously, only the Quartz and Win32 backends supported a very narrow
interface to allow for efficient pixel upload. Now with
cairo_surface_create_similar_image, cairo_surface_map_to_image, and
cairo_surface_unmap_image, Cairo exports a consistent method for
treating those surfaces as an image and so allow modification inplace.
These are the same routines used internally, and should support
efficient transfer or direct mapping of the target surfaces as
applicable.

Another focus over the past year has been to address many performance
issues, without sacrificing the composition model. To accomplish the
goal, once again the rasterisation pipeline was overhauled and made
explicit, giving the backends the freedom to implement their own
specific pipeline whilst also providing a library of common routines
from which to build the pipeline. For instance, this allows the image
backend and the gl backend to composite scan line primitives inplace,
and to then implement custom fallbacks to catch the corner cases that do
not map onto their fastest paths. Similarly, this allows for the Xlib
backend to implement trapezoidation without compromising the other
backends, yet still allow for the pipeline to be used elsewhere for
testing and fallbacks. Clipping was once again overhauled, so that the
common cases for the raster pipelines could be captured and processed
with fast paths with the emphasis on performing geometric clipping to
reduce the frequency of using multi-pass clipmasks. Stroking was made
faster, both by providing specialised fast-paths for simple, yet frequent,
cases (such as stroking around a rectangle) and by reducing the number
of edges generated by the general stroker.

As part of the focus on performance, Cairo 1.12 introduces some
antialias hints (NONE, FAST, GOOD, BEST) that are interpolated by the
rasterisers to fine tune their performance versus quality. Cairo 1.12
also introduces a new observation architecture,
cairo_surface_observer_t, which can be used to analyse the amount of
time consumed by drawing commands and help identify inefficiencies in
both Cairo and the application.

Last, but by no means least, the OpenGL backend has seen significant
work including the port to GLESv2 and the exploitation of advanced
hardware features. Interesting times.

As always, I would like to thank everyone who contributed to Cairo,
not only through writing code, but also submitting documentation, bug
reports, suggestions and generally having fun with Cairo! In particular
though this release could not have happened without the efforts of
Adrian Johnson, Alexandros Frantiz, Andrea Canicani, Martin Robinson,
Nis Martensen, and Uli Schlachter. Thanks.
-Chris

Snapshot 1.11.4 (2012-13-12)
============================
The cairo community is pleased to finally announce the long aniticpated
release candidate for 1.12, 1.11.4, of the cairo graphics library. This
is the first major update to cairo in over a year and brings a large
number of new features; undoubtably a few bugs as well.

While many people have contributed and have helped to test the release,
providing feedback on 1.10 and suggesting improvements, this release
is the result of a few persevering souls who deserve recognition for their
outstanding contributions: Andrea Canciani (all round bug fixing,
performance tuning and master of the gradients), Adrian Johnson (PDF
supremo) and Uli Schlachter (who stepped forward as maintainer for the
XCB backend).

Major additions since 1.11.2:

 * cairo_surface_map_to_image API for pixel level access to any surface

 * New antialias hints to control the trade-off between speed and quality

 * A callback pattern, cairo_pattern_create_raster_source, for lazy
   decoding of image data.

 * cairo_surface_observer_t, a new type of surface to gather performance
   statistics

 * XCB as a supported backend

 * A rewritten compositor pipeline for performance improvements for, but not
   limited to, the xlib and image backends.
   From ION and PineView through to SandyBridge, every machine I have shows
   across the board performance improvement on the cairo-traces:

   i5-2520m	gnome-system-monitor:	5.97x speedup
   pnv		gnome-system-monitor:	4.86x speedup
   i5-2520m	firefox-asteroids:	4.66x speedup
   pnv		firefox-asteroids:	4.43x speedup
   image	firefox-canvas:		3.82x speedup
   i5-2520m	firefox-canvas-alpha:	3.49x speedup
   image	firefox-asteroids:	2.87x speedup
   pnv		firefox-talos-svg:	2.83x speedup
   ion		grads-heat-map:		2.75x speedup
   pnv		firefox-canvas-alpha:	2.66x speedup
   image	gnome-system-monitor:	2.66x speedup
   image	swfdec-giant-steps:	2.46x speedup
   image	firefox-canvas-alpha:	2.14x speedup
   i5-2520m	firefox-talos-svg:	2.03x speedup
   image	grads-heat-map:		2.02x speedup
   ion		gnome-system-monitor:	2.00x speedup
   pnv		firefox-particles:	1.99x speedup
   i5-2520m	grads-heat-map:		1.96x speedup
   pnv		firefox-canvas:		1.92x speedup
   ion		firefox-particles:	1.80x speedup
   image	poppler-reseau:		1.77x speedup
   pnv		xfce4-terminal-a1:	1.72x speedup
   image	firefox-talos-svg:	1.65x speedup
   pnv		grads-heat-map:		1.63x speedup
   i5-2520m	firefox-canvas:		1.63x speedup
   pnv		swfdec-youtube:		1.62x speedup
   image	ocitysmap:		1.59x speedup
   i5-2520m	firefox-fishbowl:	1.56x speedup
   i5-2520m	poppler-reseau:		1.50x speedup
   i5-2520m	evolution:		1.50x speedup
   i5-2520m	midori-zoomed:		1.43x speedup
   pnv		firefox-planet-gnome:	1.42x speedup
   i5-2520m	firefox-talos-gfx:	1.41x speedup
   i5-2520m	gvim:			1.41x speedup
   pnv		ocitysmap:		1.37x speedup
   image	poppler:		1.31x speedup
   ion		firefox-canvas-alpha:	1.35x speedup
   ion          firefox-talos-svg:	1.34x speedup
   i5-2520m	ocitysmap:		1.32x speedup
   pnv		poppler-reseau:		1.31x speedup
   i5-2520m	firefox-planet-gnome:	1.31x speedup
   pnv		firefox-fishbowl:	1.30x speedup
   pnv		evolution:		1.28x speedup
   image	gvim:			1.27x speedup
   i5-2520m	swfdec-youtube:		1.25x speedup
   pnv		gnome-terminal-vim:	1.27x speedup
   pnv		gvim:			1.25x speedup
   image	firefox-planet-gnome:	1.25x speedup
   image	swfdec-youtube:		1.25x speedup
   ...

And a plethora of minor improvements everywhere!
-Chris

Snapshot 1.11.2 (2011-01-23)
===========================

In this first snapshot along the way to cairo-1.12.0, we are very excited
to announce the introduction of Bezier surface gradients, known as type
6/7 gradients in PS/PDF parlance. This is the culmination of much work by
the dynamic duo: Adrian Johnson and Andrea Canciani. Thanks guys!

Also, I want to warmly welcome Uli Schlachter who recently joined the
Cairo community on a mission. That mission is to make cairo-xcb a
supported backend for 1.12. And for this snapshot he has made great
strides in fixing all the bugs I had left behind. Thanks Uli!

And we have also seen a new contributor, Alexandros Frantzis, who has
begun bringing up cairo-gl for GLESv2 devices. Thanks Alex!

And lastly, I must also thank Adrian and Andrea for the vast numbers of
bugs that they have tackled between them, fixing all those little corner
cases that lie hidden until too late.

API additions:

The ability to construct piece-wise Bezier surface gradients:

	cairo_pattern_create_mesh

	constructs a pattern of type CAIRO_PATTERN_TYPE_MESH using

	cairo_pattern_mesh_begin_patch
	cairo_pattern_mesh_end_patch
	cairo_pattern_mesh_curve_to
	cairo_pattern_mesh_line_to
	cairo_pattern_mesh_move_to
	cairo_pattern_mesh_set_control_point
	cairo_pattern_mesh_set_corner_color_rgb
	cairo_pattern_mesh_set_corner_color_rgba
	cairo_pattern_mesh_get_patch_count
	cairo_pattern_mesh_get_path
	cairo_pattern_mesh_get_corner_color_rgba
	cairo_pattern_mesh_get_control_point

The introduction of a unique ID accessible via the mime data type:
	CAIRO_MIME_TYPE_UNIQUE_ID





Release 1.10.2 (2010-12-25 Chris Wilson <chris@chris-wilson.co.uk>)
===================================================================
The cairo community is pleased to announce the 1.10.2 release of the
cairo graphics library. This is the first update to cairo's stable 1.10
series and contains a large number of bug fixes.

While many people have contributed and have help to test the release,
2 people deserve special recognition for their efforts in tracking down
and fixing bugs, Andrea Canciani and Adrian Johnson. Thanks to their
tremendous efforts, and of all cairo contributors, it is much
appreciated.

We recommend everyone upgrade to cairo 1.10.2 and hope that everyone
will continue to have lots of fun with cairo!

-Chris

Bug fixes
---------

  Fix embedding of grayscale jpegs in PS.
  https://bugs.freedesktop.org/show_bug.cgi?id=31632

  Fix the reported path of extents containing a curve.

  Fix the compositing of unaligned boxes.

  Reset the clipper in PDF upon finish.

  Fix degenerates arcs to become a degenerate line.

  Build support for autoconf 2.67

  Fix painting of transformed patterns in PS

  Fix the EPS bounding box for PS
  https://bugs.freedesktop.org/show_bug.cgi?id=24688

