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NEWS: Add notes for the 1.8.0 release.
Heavily cribbed from 1.7.x snapshot NEWS of course.
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Carl Worth
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NEWS
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NEWS
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Snapshot 1.8.0 (2008-09-25 Carl Worth <cworth@cworth.org>)
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==========================================================
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The cairo community is happy (and relieved) to announce the 1.8.0
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release of the cairo graphics library. This is a major update to
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cairo, with new features and enhanced functionality which maintains
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compatibility for applications written using any previous major cairo
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release, (1.6, 1.4, 1.2, or 1.0). We recommend that anybody using a
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previous version of cairo upgrade to cairo 1.8.0.
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The dominant theme of this release is improvements to cairo's ability
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to handle text. The highlights include a new "user fonts" feature as
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well as a new cairo_show_text_glyphs API which allows glyphs to be
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embedded in PDF output along with their original text, (for searching,
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selection, and copy-and-paste). Another major feature is a revamp of
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cairo's build system making it much easier to build cairo on various
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platforms.
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See below for more details.
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User fonts
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----------
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This new API allows the user of cairo API to provide drawings for
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glyphs in a font. A common use for this is implementing fonts in
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non-standard formats, like SVG fonts and Flash fonts. This API can
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also be used by applications to provide custom glyph shapes for fonts
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while still getting access to cairo's glyph caches. See
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test/user-font.c and test/user-font-proxy.c for usage examples. This
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is based on early work by Kristian Høgsberg. Thanks Kristian!
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This new API consists of the following functions (and corresponding
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_get functions):
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cairo_user_font_face_create
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cairo_user_font_face_set_init_func
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cairo_user_font_face_set_render_glyph_func
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cairo_user_font_face_set_text_to_glyphs_func
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cairo_user_font_face_set_unicode_to_glyph_func
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An additional, new API is
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cairo_scaled_font_text_to_glyphs
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We were previously reluctant to provide this function as
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text-to-glyphs support in cairo was limited to "toy" font
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functionality, not really interesting for real-world text
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processing. However, with user fonts landing, this API is needed to
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expose full access to how user fonts convert text to glyphs. This is
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expected to be used by text toolkits like Pango, as well as "proxy"
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user-font implementations.
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cairo_show_text_glyphs
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----------------------
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This new API allows the caller of cairo to provide text data
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corresponding to glyphs being drawn. The PDF backend implements this
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new API so that complex text can be copied out of cairo's PDF output
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correctly and reliably, (assuming the user of cairo calls
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cairo_show_text_glyphs). The cairo_show_text_glyphs API is definitely
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the most daunting API to debut in cairo. It is anticipated that pango
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(and similar high-level text libraries) will be the primary users of
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this API. In fact, pango 1.22 already uses cairo_show_text_glyphs.
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Behdad was the architect and implementor of this effort. Thanks,
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Behdad!
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The cairo_show_text_glyphs API includes the following new functions:
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cairo_show_text_glyphs
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cairo_glyph_allocate
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cairo_glyph_free
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cairo_text_cluster_allocate
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cairo_text_cluster_free
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cairo_surface_has_show_text_glyphs
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Build system revamp
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-------------------
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The primary goal of the revamp is to make the build system less
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fragile, (particularly for non-Linux platforms). For example, now
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people building on win32 will no longer need to maintain a
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platform-specific list of files to be built. See the new README.win32
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for details. Also, the .so file will now be installed with a different
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naming scheme, (for example, 1.7.6 will install with a .10800
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suffix). Many thanks to Behdad and his small army of helpers!
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Assorted API additions
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----------------------
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For API completeness, several missing "getter" functions were added:
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cairo_scaled_font_get_scale_matrix
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cairo_surface_get_fallback_resolution
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cairo_toy_font_face_create
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cairo_toy_font_face_get_family
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cairo_toy_font_face_get_slant
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cairo_toy_font_face_get_weight
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The new cairo_toy_font_face functions provide access to functionality
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and settings provided by cairo_select_font_face(). Thanks Behdad!
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cairo-ps/cairo-pdf: More efficient output
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-----------------------------------------
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Adrian Johnson has been busy fixing all kinds of bugs in PS and PDF
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backends, as well making them generate much more compact output by
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avoiding things like re-emitting the color or linestyle on every
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drawing operation. Thanks Adrian!
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cairo-xlib: dithering
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---------------------
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Dithering: Cairo now does simple dithering when rendering to legacy X
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servers. This is most visible with 8-bit visuals. Thanks Behdad!
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cairo-xlib: Avoid rendering glyphs out of surface bounds
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--------------------------------------------------------
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This seemingly harmless optimization exposed a bug in OpenOffice.org 3
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versions where OO.o was passing bogus surface extents to cairo,
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resulting in no text rendered in OO.o. Please contact your
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distribution's OO.o maintainers if you see this bug and point them to
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the following URL:
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https://bugs.freedesktop.org/show_bug.cgi?id=16209
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cairo-xlib: Improved performance with X server without Render
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-------------------------------------------------------------
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Cairo now performs better on remote X servers that lack the Render
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extension by being smarter about using X core protocol facilities
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instead of falling back to doing all rendering on the client side.
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cairo-ft: respecting FC_FT_FACE
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-------------------------------
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Previously it was impossible to instruct cairo to do emboldening on a
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font face object created from an FT_Face. Cairo now respects and uses
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the FC_FT_FACE fontconfig pattern element, so emboldening can be
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achieved by using cairo_ft_font_face_create_for_pattern() and a
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carefully crafted pattern using FC_FT_FACE and FC_EMBOLDEN. Thanks
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Behdad!
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cairo-directfb: backend improvements
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------------------------------------
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The directfb backend, though still unsupported, has seen a good deal
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of improvements. Thanks Vlad!
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Bug fixing and optimizations
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----------------------------
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xlib: Faster bookkeeping (Karl Tomlinson)
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https://bugzilla.mozilla.org/show_bug.cgi?id=453199#c5
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PS: Fix gradients with non-constant alpha (Chris Wilson)
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Fix deadlock in user-font code (Richard Hughes and Behdad Esfahbod)
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http://bugs.freedesktop.org/show_bug.cgi?id=16819
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Countless other bugs have been fixed and optimizations made, many of
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them thanks to Chris Wilson. Thanks Chris and others!
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Note also that the code that had been in cairo 1.7.x calling into
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freetype's optional lcd_filter function was removed from cairo before
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the 1.8.0 release. We do expect this code to come back in some form in
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the future.
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Snapshot 1.7.6 (2008-09-17 Carl Worth <cworth@cworth.org>)
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==========================================================
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The cairo community is happy to announce the 1.7.6 snapshot of the
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@ -43,7 +205,7 @@ series:
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convenience function on the cairo_t is not obviously
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necessary. An application can easily call:
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cairo_surface_has_show_glyphs (cairo_get_target (cr));
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cairo_surface_has_show_glyphs (cairo_get_target (Sr));
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as needed.
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@ -85,12 +247,12 @@ cairo-user-font-private.h in the distribution.
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Snapshot 1.7.2 (2008-08-11 Behdad Esfahbod <behdad@behdad.org>)
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===============================================================
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The cairo community is finally ready to announce availability of the 1.7.2
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snapshot of the cairo graphics library. This is embarrissingly the first
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snapshot of the cairo graphics library. This is embarrassingly the first
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snapshot in the 1.7 unstable series of cairo, leading to the eventual release
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of cairo 1.8, currently planned for late September.
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This snapshot comes four months after the 1.6.4 release. We have done a
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really bad job on getting development stapshots out this cycle, but
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really bad job on getting development snapshots out this cycle, but
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hopefully all the API changes for 1.8 are now finished and the remaining
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weeks will be spent on bug-fixing. There is more than 400 commits worth
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of changes in this snapshot, and those can use some testing. Read on!
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@ -5399,4 +5561,4 @@ Carl Worth <cworth@isi.edu> wrote the first lines of Xr, after Keith
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Packard <keithp@keithp.com> proposed the plan for a stateful drawing
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library in C providing a PostScript-like rendering model.
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LocalWords: mutex BeOS extraordinaire
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LocalWords: mutex BeOS extraordinaire distro's URL lcd bool tarball
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