http://cairographics.org/manual/cairo-Microsoft-Windows-Backend.html
Disabled backend: quartz
------------------------
Unfortunately, the quartz backend code is currently out of date with
respect to some recent backend interface changes. So, the quartz
backend is disabled in this snapshot.
If the quartz backend is brought up-to-date before the next snapshot,
we would be glad to make a 0.4.1 snapshot that re-enables it, (we do
not expect many more big backend interface changes).
API Changes
-----------
The font system has been revamped, (as Owen Taylor's work with
integrating pango and cairo gave us the first serious usage of the
non-toy font API).
One fundamental, user-visible change is that the cairo_font_t object
now represents a font that is scaled to a particular device
resolution. Further changes are described below.
cairo.h
-------
Removed cairo_font_set_transform and cairo_font_current_transform.
Added cairo_font_extents and cairo_font_glyph_extents. See
documentation for details:
http://cairographics.org/manual/cairo-cairo-t.html#cairo-font-extents
cairo-ft.h
----------
The cairo_ft_font API changed considerably. Please see the
documentation for details:
http://cairographics.org/manual/cairo-FreeType-Fonts.html
Performance
-----------
Make the fast-path clipping (pixel-aligned rectangles) faster.
Add optimization for applying a constant alpha to a pattern.
Optimize gradients that are horizontal or vertical in device space.
Xlib: When RENDER is not available, use image surfaces for
intermediate surfaces rather than xlib surfaces.
Backend-specific changes
------------------------
Glitz
-----
Major update to glitz backend. The output quality should now be just
as good as the image and xlib backends.
Track changes to glitz 0.4.0.
PDF
---
Various improvements to produce more conformant output.
Internals
---------
David Reveman contributed a large re-work of the cairo_pattern_t
implementation, providing cleaner code and more optimization
opportunities.
Backend interface changes
-------------------------
Rework backend interface to accept patterns, not surfaces for source
and mask.
Remove set_matrix, set_filter, and set_repeat functions.
More sophisticated backend interface for image fallbacks,
({acquire,release}_{source,dest}_image() and clone_similar).
Bug fixes
---------
Only install header files for backends that have been compiled.
Fixed some rounding errors leading to incorrectly placed glyphs.
Many other minor fixes.
New license: LGPL/MPL
---------------------
The most significant news with this release is that the license of
cairo has changed. It is now dual-licensed under the LGPL and the
MPL. For details see the COPYING file as well as COPYING-LGPL-2.1 and
COPYING-MPL-1.1.
I express my thanks to everyone involved in the license change process
for their patience and support!
New font and glyph internals
----------------------------
Graydon Hoare has put a tremendous amount of work into new internals
for handling fonts and glyphs, including caches where appropriate.
This work has no impact on the user-level API, but should result in
great performance improvements for applications using text.
New test suite
--------------
This snapshot of cairo includes a (small) test suite in
cairo/test. The tests can be run with "make check". The test suite was
designed to make it very easy to add new tests, and we hope to see
many contributions here. As you find bugs, please try adding a minimal
test case to the suite, and submit it with the bug report to the
cairo@cairographics.org mailing list. This will make it much easier
for us to track progress in fixing bugs.
New name for glitz backend
--------------------------
The gl backend has now been renamed to the glitz backend. This means
that the following names have changed:
CAIRO_HAS_GL_SURFACE -> CAIRO_HAS_GLITZ_SURFACE
cairo_set_target_gl -> cairo_set_target_glitz
cairo_gl_surface_create -> cairo_glitz_surface_create
This change obviously breaks backwards compatibility for applications
using the old gl backend.
Up-to-date with latest glitz snapshots
--------------------------------------
This snapshot of cairo is now up to date with the latest glitz
snapshot, (currently 0.2.3). We know that the latest cairo and glitz
snapshots have been incompatible for a very long time. We've finally
fixed that now and we're determined to not let that happen again.
Revert some tessellation regression bugs
Miscellaneous changes
---------------------
Changed CAIRO_FILTER_DEFAULT to CAIRO_FILTER_BEST to make gradients
easier.
Track XCB API change regarding iterators.
Various bug fixes
-----------------
Fix calculation of required number of vertices for pen.
Fix to avoid zero-dimensioned pixmaps.
Fix broken sort of pen vertices.
Fix bug when cairo_show_text called with a NULL string.
Fix clipping bugs.
Fix bug in computing image length with XCB.
Fix infinite loop bug in cairo_arc.
Fix memory management interactions with libpixman.
Fixes for gcc 3.4
-----------------
Fix prototype mismatches so that cairo can be built by gcc 3.4.
Updates to track glitz
----------------------
Various fixes to support the latest glitz snapshot (0.1.2).
Gradient updates
----------------
Radial gradients now support both inner and outer circles.
Transformed linear gradients are now properly handled.
Fixes for extend type reflect.
Glitz updates
-------------
Converted shading routines to use fixed point values and introduced a
shading operator structure for more efficient shading calculations.
Support compositing with mask surface when mask is solid or
multi-texturing is available.
PNG backend cleanups
--------------------
Fix output to properly compensate for pre-multiplied alpha format in cairo.
Add support for A8 and A1 image formats.
Bug fixes
---------
Avoid crash or infinite loop on null strings and degeneratively short
splines.
New? bugs in cairo_clip
-----------------------
There are some fairly serious bugs in cairo_clip. It is sometimes
causing an incorrect result. And even when it does work, it is
sometimes so slow as to be unusable. Some of these bugs may not be
new, (indeed cairo_clip has only ever had a braindead-slow
implementation), but I think they're worth mentioning here.
* Cairo was updated to track the changes in libpixman, and now depends
on libpixman version 0.1.1
Changes 0.1.21:
* New OpenGL backend
* Automatic detection of available backends
Changes 0.1.20:
* New pattern API
* Update to XCB backend
* Faster clipping
Includes new functions:
- cairo_current_path, cairo_current_path_flat,
cairo_surface_get_filter. Support for XCB backend. Fixes for
building in cygwin. Adds cairo_surface_get_filter.
Cairo is a vector graphics library with cross-device output support. Currently
supported output targets include the X Window System and in-memory image
buffers. PostScript and PDF file output is planned. Cairo is designed to
produce identical output on all output media while taking advantage of display
hardware acceleration when available (eg. through the X Render Extension).
Cairo provides a stateful user-level API with capabilities similar to the PDF
1.4 imaging model. Cairo provides operations including stroking and filling
Bezier cubic splines, transforming and compositing translucent images, and
antialiased text rendering.
