Cairo

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NEWS/Changelog

1.6-3   (2024-08-05)
    o   Add support for glyph rendering (see grid.glyph()).

    o   Fix compilation when CAIRO_HAS_PDF_SURFACE is false. (#48)

    o   Replace gsetVar() with GEaddDevice2() where supported.

1.6-2   (2023-11-28)
    o   Minor bugfixes: invalid format specified in UBiDi error
        string, incorrect font name passed if the font family
        name is too long.

    o   Update Windows build to use pkg-config (Thanks to Tomáš
        Kalibera!) (#43)

1.6-1   (2023-08-17)
    o   The following additional arguments can be used to set PDF
        metadata: title, author, subject, creator, keywords,
        create.date and modify.date if cairo version 1.16 or
        higher is used. (#15)

    o   The version argument for PDF back-end is now honored and
        defaults to 1.4. Note that currently cairo library only
        supports PDF target versions 1.4 or 1.5.

    o   The xlib back-end no longer requires headers from Xt. (#39)

1.6-0   (2022-07-05)
    o   Added text drawing using Harfbuzz and ICU. This significantly
        improves the quality of text rendeded by Cairo and enables
        support for right-to-left and bi-directional text. (#23)
        It also enables the use of ligatures. (#18)
        This feature is only enabled if pkg-config is present and
        knows how to use the harfbuzz-icu module.

    o   The family= argument in text drawing is now honored also for
        FreeType and Harfbuzz back-ends.

    o   configure gains two arguments: --with-freetype and
        --with-harfbuzz. They both default to auto which means
        FreeType and Harfbuzz will be used if present. If set to yes
        then the support is required. If set to no (or the
        --without form is used) then the corresponding support is
        explicitly disabled. Note that Harfbuzz requires FreeType.

    o   added --enable-debug argument to configure which will make
        Cairo extremely chatty on the console.

    o   By default cairo-ft will be ignored on Windows, becasue it
        it does not work without associated FontConfig configuration
        files and font cache. (#37)
        This behavior can be changed by using -DUSE_CAIRO_FT=1 to
        force the use of cairo-ft unconditionally.

    o   Cairo.capabilities() now also reports two capabilities
        which are not format-related: "freetype" and "harfbuzz". The
        former indicates whether cairo-ft is used and the later
        indicates whether the newly introduced Harfbuzz + ICU
        bi-directional rendering support is present.

1.5-15  (2022-03-16)
    o   CairoX11 (xlib back-end): install an X11 I/O error handler
        while processing events such that broken connections are
        detected and don't kill R.

    o   added the option to license under GPL v3. All original
        authors explicitly agreed and included code based on R is
        licensed under GPL-2+ allowing this.

1.5-14  (2021-12-21)
    o   update configure/autoconf, some dependencies such as libtiff
        are now also detected using pkg-config. Tests are now correctly
        using CPPFLAGS from R.

    o   add entry points for GE version 13 (needed for R 4.1.0)
        Note that this is just a port of CRAN NMU which was posted as
        version 1.15-12.2 on CRAN, but was not an actual Cairo version.

1.5-13  (2020-04-15)
    o   add support for CairoFont(usePUA=FALSE) to support regular
        fonts without Adobe Symbol Encoding as symbol fonts in
        R 4.0.0 and higher. Setting usePUA=FALSE in older versions of
        R will issue a warning.

1.5-12  (2020-04-11)
    o   use pkg-config --static --libs when needed

    o   adapt to API changes in R 4.0.0, also improves symbol
        placement in recent R versions

1.5-11  (2020-02-26)
    o   fixed missing PROTECT() (thanks to Tomáš Kalibera)

    o   minor changes to remove R CMD check warnings

1.5-10  (2019-03-27)
    o   support compilation with C++11-only compilers (#19)

    o   add path.expand() for filenames (#12)

    o   add C symbol registration

    o   update configure.ac to be more compliant

1.5-9   (2015-09-25)
    o   work around bug #45376 in freetype 2.6.0 causing compilation
        failure

1.5-8   (2015-07-29)
    o   fix a premature memory release in locator handling for
        raster back-ends.

1.5-7   (2015-07-27)
    o   fix a segfault in CairoFontMatch() in case FcNameParse()
        fails (closes #10)

    o   image back-end can now provide custom locator if
        a locator argument is passed to Cairo() with the desired
        callback function. The callback function accepts dev argument
        and should return either a numeric vector of length 2 (x, y)
        or NULL. This is mainly useful for type=raster'` passed to
        external UI where that UI can provide locator capability.

    o   add Cairo.snapshot() which is similar to recordPlot() but
        also allows the retrieval of the last snapshot.

1.5-6   (2014-06-26)
    o   scale line width by the same amount as fonts such that
        resolution changes are consistent even in that respect

1.5-5   (2013-12-23)
    o   fix onSave reporting incorrect page number for the last page
        (introduced in 1.5-4, closes #6)

    o   scale fonts unconditionally according to the dpi adjustment
        (fixes issues with grid graphics and dpi changes)

1.5-4   (2013-12-12)
    o   fix invalid pointsize scaling if dpi auto-detection is used
        (closes #1)

    o   fix failure to emit final page in some multi-page settings
        (closes #4)

    o   the `res' parameter in CairoPNG(), CairoTIFF() and CairoJPEG()
        it now passed down to Cairo() which now accepts `res' to
        override the value of dpi' if res' is set to anyhting other
        than NA or NULL. (closes #3)

    o   release onSave callback function on close (closes #2)

1.5-3   (2013-12-03)
    o   remove compatibility layers to make R 3.x happy

    o   adjust pointsize according to the dpi setting

1.5-2   (2012-11-05)
    o   added Cairo.onSave() callback which allows R code to be run
        when Cairo finishes a page

    o   added Cairo.serial() function which allows user code to check
        whether the graphics have been updated

    o   bugfix/update in Cairo connection patch (by Karl Millar)

1.5-1   (2011-12-10)
    o   add support for dev.hold()/dev.flush()

    o   use new R 2.14.0 device capabilities advertizing feature

    o   fix memory leak when setting fonts via CairoFonts()

    o   explicitly request font anti-aliasing even if it is not the
        surface default - in particular Windows has disabled font
        anti-aliasing by default

1.5-0   (2011-09-30)
    o   fix swapped bold vs italic traits if freetype is not available

    o   use Times font for symbols on Windows because Symbol font
        doesn't seem to support Unicode

    o   add support for poly-paths

    o   add support for dev.capture()/grid.cap()

    o   added new type "raster" that creates an image back-end without
        any output file. It can be used in conjunction with
        dev.capture() to create in-memory image representations, e.g.:
        Cairo(type=`raster')
        plot(1:10, col=2)
        p = writePNG(dev.capture(native=TRUE), raw())
        will create a raw vector containg a PNG image.

1.4-9   (2011-04-06)
    o   force static built-in libraries on Windows to prevent Cairo
        from picking up broken system libraries

1.4-8   (2011-03-07)
    o   spurious character in the 1.4-7 w32-backed source has made it
        unusable on Windows. This is a re-packaging of 1.4-7 without
        that spurious character.

1.4-7   (2011-03-07)
    o   fix a bug in raster support causing raster to be usable only
        once

    o   win backend: release and re-get DC on resize -- fixes resizing
        issues in CairoWin() for some Windows versions

1.4-6   (2011-02-10)
    o   adds raster image support (courtesy of R core)

    o   update Windows libcairo binary to cairo 1.10.2, use static
        build to avoid DLL issues and add 64-bit binary

1.4-5   (2009-07-16)
    o   minor Windows configuration change

    o   fix SET_VECTOR_ELT issue for R 2.9.0+

1.4-4   (2008-10-17)
    o   adapt to changes in R-devel (2.9.0-to-be), clean up warnings

1.4-3   (2008-07-21)
    o   make the use of an invalid font non-fatal

    o   allow Cairo to compile on some older systems that don't have
        trunc()

    o   updated libcairo binary for Windows to 1.6.4 (from GTK+)

1.4-2   (2008-04-03)
    o   adapt to even more changes in R 2.7

1.4-1   (2008-03-14)
    o   adapt to R 2.7 changes

1.4-0
    o   fix DPI detection in X11 back-end and use 90dpi as a fallback

    o   fix cra settings to be closer to what other devices use

    o   CairoX11 no longer fixes DPI to 72, "auto" is now the default.
        In addition, CairoWin and CairoX11 allow additional arguments
        to ba passed to Cairo.

1.3-5   (2007-08-27)
    o   adapt to const char* CHARs in R-devel

    o   fix a bug in CairoSVG (wrong argument name)

    o   fix a bug in CairoPS (units were not set to "in" and
        width/height had no defaults)

    o   fix unintentional doubling of the .ps suffix

1.3-4   (2007-05-10)
    o   more fixes in flag-guessing

    o   some vector backends (e.g. PDF, SVG) were falling back to
        bitamp rasterization, we try to prevent this

    o   address expose issues with some X11 servers

    o   add CairoSVG wrapper

    o   add an unified way to register back-ends and get a list of all
        supported types.

    o   add Cairo.capabilities() function

1.3-3   2007-04-25
    o   improve detection of cairo and its dependencies

    o   work around missing API such that cairo 1.0 can be used.
        However, it is strongly encouraged to use cairo 1.2 or
        possibly 1.4 as they contain important bugfixes.

    o   fix page numbering to start at 1 (was 0) and update
        documentation correspondingly

1.3-2   2007-04-18
    o   added format autodetection for tiff and png. The 32-bit
        version of either format is used if the background
        is not opaque.

    o   fixed bug in the value returned by Cairo

    o   added type and file attributes to the Cairo object

    o   added (hidden, experimental) functions that allow direct
        modification of image content in Cairo (.image, .ptr.to.raw
        and .raw.to.ptr)

1.3-1
    o   change semantics of canvas and bg to match other devices:
        canvas is used by devices that don't support any kind
        of transparency in case bg is translucent

    o   fixed data ordering issues in TIFF and JPEG output

    o   added "compression" parameter to TIFF back-end which
        now defaults to LZW compression

1.3-0
    o   add support for canvas and dpi specification

    o   allow backends to detect native resolution

    o   add support for custom parameters (e.g. quality for jpeg)

1.2-1
    o   improve rendering on bitmap devices by aligning straight lines
        to the pixel grid and adding bleed to such fills.

    o   added wrappers that take exactly the same parameters as
        existing devices such as png, jpeg, pdf, postscript, X11 or
        windows and map them to calls to Cairo. They can be used to
        replace native devices by Cairo without the need to change
        existing code.

    o   added namespace

1.2-0
    o   additional interactive back ends: X11 (XLib) and win (Win32)

    o   enhanced back-end API to support interactive back-ends

    o   change default backgroud color to "white", because
        alpha-blending doesn't work properly in cairo when painting on
        purely transparent background.

    o   change the way filenames are interpreted, use multi-file
        printf convention as other devices do.

    o   added support for jpeg and tiff image formats

1.1-0
    o   additional file/stream back-ends: svg, ps

    o   enhanced back-end API

1.0-0
    o   fixed function names to not conflict with GDD

0.1-5
    o   added R connections patch support at config time.
        see
        http://wiki.r-project.org/rwiki/doku.php?id=developers:r_connections_api

0.1-4   (2006-12-07)
    o   add pdf backend (Jeff Horner)

    o   fix up backend infrastructure (Jeff Horner)

0.1-3   (2006-12-06)
    o   add freetype and fontconfig support (Jeff Horner)

    o   fix memory leaks (Jeff Horner)

    o   make transparent background default with bg="transparent"

0.1-2   (2006-12-05)
    o   add support for caps/joints (patch by Jeff Horner)

    o   make rectangels to snap to grid (patch by Jeff Horner)

    o   use transparent image background by default

0.1-1   (2005-12-23)
    o   first official release, image backend works, others are
        waiting to be implemented by volunteers