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[configure.in,NEWS] Release 1.7.2
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Behdad Esfahbod
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2 changed files with 179 additions and 31 deletions
204
NEWS
204
NEWS
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@ -1,38 +1,186 @@
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- User fonts: This is new API allowing the user of cairo API to provide
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drawings for glyphs in a font. This is most useful in implementing
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fonts in non-standard formats, like SVG fonts and Flash fonts, but can
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also be used by games and other application to draw "funky" fonts.
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See test/user-font.c and test/user-font-proxy.c for usage examples.
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Release 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 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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Note that user font API changed a bit just before this release.
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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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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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- show_text_glyphs: This is new API allowing the caller of cairo to mark
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text glyphs with their original text. The PDF backend implements this
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new API and latest Pango master uses it. The result is (when bugs are
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fixed) that complex text can be copied out of pangocairo's PDF output
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correctly and reliably. There are bugs to fix though. A few poppler
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bugs, and some more in cairo and pango.
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Text, text, and more text!
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--------------------------
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The dominant theme of this release, and 1.8 in general, is improvements
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around cairo text API. Here is a high-level list of changes with text
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handling:
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To test show_text_glyph, just grab pango master & this cairo snapshot and
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print text in gedit. Open in acroread or evince, select all, copy, paste
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in gedit and compare. The Arabic text with diacritic marks is particularly
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showing bad. Try with pango/pango-view/HELLO.txt if you are brave
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enough. The Indic text is showing improvements, but is still coming out
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buggy.
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User fonts
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----------
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This is new API allowing the user of cairo API to provide drawings for glyphs
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in a font. This is most useful in implementing fonts in non-standard formats,
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like SVG fonts and Flash fonts, but can also be used by games and other
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applications to draw "funky" fonts. See test/user-font.c and
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test/user-font-proxy.c for usage examples. This is based on early work by
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Kristian Høgsberg. Thanks Kristian!
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- text_to_glyphs API: This is mostly useful in combination with user-fonts.
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show_text_glyphs
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----------------
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This new API allows the caller of cairo to mark text glyphs with their
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original text. The PDF backend implements this new API and latest Pango
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master uses it. The result is (when bugs are fixed) that complex text can be
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copied out of pangocairo's PDF output correctly and reliably. There are bugs
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to fix though. A few poppler bugs, and some more in cairo and pango.
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The result of the above three changes combined is that when you render text
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using cairo_show_text() and a user font, the resulting PDF file is perfectly
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text extractable. Something one could not do with cairo before.
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To test show_text_glyph, just grab pango master and this cairo snapshot and
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print text in gedit. Open in acroread or evince, select all, copy, paste
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in gedit and compare. The Arabic text with diacritic marks is particularly
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showing bad. Try with pango/pango-view/HELLO.txt if you are brave
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enough. The Indic text is showing improvements, but is still coming out
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buggy.
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- Toy font face constructor and getters: Mostly for API completion, but
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also useful for higher level (like Pango) to hook into what the user
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has set using cairo_select_font_face(), making that toy API a bit more
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useful.
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LCD subpixel filtering using FreeType
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-------------------------------------
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FreeType 2.3.5 added support for various LCD subpixel filtering, and
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fontconfig 2.6.0 added support for configuring LCD filter on a font by font
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basis. Cairo now relies on FreeType and fontconfig for subpixel filtering.
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This work is based on David Turner's original patch to cairo, maintained
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and tested by Sylvain Pasche and others. Thanks all!
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- LCD subpixel filtering using FreeType, with different filters. Original
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patch by David Turner.
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Toy font face constructor and getter
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------------------------------------
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Mostly for API completion, but also useful for higher level (like Pango) to
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hook into what the user has set using cairo_select_font_face(), making that
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toy API a bit more useful.
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FreeType: respecting FC_FT_FACE
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-------------------------------
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Previously it was impossible to instruct cairo to do emboldening on a font
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face object created from an FT_Face. Cairo now respects and uses the
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FC_FT_FACE fontconfig pattern element, so emboldening can be achieved by
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using cairo_ft_font_face_create_for_pattern() and a carefully crafted pattern
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using FC_FT_FACE and FC_EMBOLDEN.
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PS/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 avoiding
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things like re-emitting the color or linestyle on every drawing operation.
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Thanks Adrian!
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Xlib: Dithering
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---------------
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Cairo now does simple dithering when rendering to legacy X servers. This is
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mostly visible with 8-bit visuals.
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Xlib: Avoid rendering glyphs out of surface bounds
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--------------------------------------------------
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This seemingly harmless change manifested a bug with OpenOffice.org 3 versions
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where OO.o was passing bogus surface extents to cairo, resulting in no text
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rendered in OO.o. Please contact your distro's OO.o maintainers if you see
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this bug and point them to the following URL:
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https://bugs.freedesktop.org/show_bug.cgi?id=16209
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Xlib: Improved performance with Xrender-less X servers
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------------------------------------------------------
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Cairo now performs better on remote, Xrender-less X servers by being smarter
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about using X core protocol facilities instead of falling back to doing all
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rendering on the client side.
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Directfb: backend improvements
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------------------------------
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The directfb backend, though still unsupported, has seen a good deal of
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improvements. Thanks Vlad!
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Bug fixing and optimizations
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----------------------------
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Countless bugs have been fixed and optimizations made, many of them thanks to
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Chris Wilson. Thanks Chris!
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API additions
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-------------
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cairo_show_text_glyphs
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This is a new text rendering API. Being a more advanced version of
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cairo_show_glyphs(), it is aimed for use by higher-level text toolkits like
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Pango, and enables better text extraction from output generated by backends
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like PDF and SVG. The PDF backend already implements it, and the upcoming
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Pango release will use it.
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To make that API work, a bunch of other additions were made:
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cairo_glyph_allocate
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cairo_glyph_free
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cairo_text_cluster_t
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cairo_text_cluster_allocate
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cairo_text_cluster_free
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cairo_has_show_text_glyphs
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cairo_user_font_face_create
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This is the "user" font face constructor, accompanied by a variety of method
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signatures, getters, and setters for a callback-based font backend:
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CAIRO_FONT_TYPE_USER
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cairo_user_scaled_font_init_func_t
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cairo_user_scaled_font_render_glyph_func_t
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cairo_user_scaled_font_text_to_glyphs_func_t
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cairo_user_scaled_font_unicode_to_glyph_func_t
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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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cairo_user_font_face_get_init_func
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cairo_user_font_face_get_render_glyph_func
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cairo_user_font_face_get_text_to_glyphs_func
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cairo_user_font_face_get_unicode_to_glyph_func
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cairo_scaled_font_text_to_glyphs
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We were previously reluctant to provide this function as text-to-glyphs
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support in cairo was limited to "toy" font functionality, not really
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interesting for real-world text processing. However, with user-fonts
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landing, this API is needed to expose full access to how user-fonts
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convert text to glyphs. This is expected to be used by text toolkits like
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Pango, as well as "proxy" user-font implementations.
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cairo_lcd_filter_t
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cairo_font_options_set_lcd_filter
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cairo_font_options_get_lcd_filter
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These add the possibility to choose between various available LCD subpixel
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filters. The available filter values are modeled after what FreeType
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provides.
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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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These provide access to functionality and settings provided by
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cairo_select_font_face().
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cairo_scaled_font_get_scale_matrix
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cairo_surface_get_fallback_resolution
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For API completeness.
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Various new values for cairo_status_t enum
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Known issues:
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@ -7,7 +7,7 @@ dnl For the micro number: odd => in-progress development (from git)
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dnl even => tar-file snapshot or release
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m4_define(cairo_version_major, 1)
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m4_define(cairo_version_minor, 7)
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m4_define(cairo_version_micro, 1)
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m4_define(cairo_version_micro, 2)
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AC_INIT([cairo],
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cairo_version_major.cairo_version_minor.cairo_version_micro,
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@ -27,7 +27,7 @@ dnl ===========================================================================
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# libtool shared library version
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# Increment if the interface has additions, changes, removals.
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m4_define(LT_CURRENT, 20)
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m4_define(LT_CURRENT, 21)
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# Increment any time the source changes; set to
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# 0 if you increment CURRENT
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@ -36,7 +36,7 @@ m4_define(LT_REVISION, 0)
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# Increment if any interfaces have been added; set to 0
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# if any interfaces have been removed. removal has
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# precedence over adding, so set to 0 if both happened.
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m4_define(LT_AGE, 18)
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m4_define(LT_AGE, 19)
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dnl ===========================================================================
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