[cairo] cairo snapshot 1.15.10 now available
Bill Spitzak
spitzak at gmail.com
Thu Jan 4 19:54:09 UTC 2018
On Thu, Jan 4, 2018 at 7:46 AM, Mikael Claesson <miclaes at yahoo.com> wrote:
> Hmm, interesting! But why is this better than having separate API functions
> for UTF-8 and thus avoid the risk altogether?
Because it removes the need for the code to know whether the text is
UTF-8 or not.
> FWIW, filenames in my application are often not "readable" but a combination
> of letters, numbers and symbols which make up an identifier. It's quite
> possible that these will also never clash, but why take the chance?
If you limit it to ASCII (ie bytes <= 0x7F) it will never clash. You
can go further because it also requires a byte in the range 0xC0-0xFF
followed by at least one in the range 0x80-0xBF, so if you don't allow
one of those ranges you will also never clash.
Even if you use completely random bytes the chances that one string
will decode as UTF-8 to the same name that another one also decodes to
seems incredibly small, you already have to deal with case folding on
Windows which is far more likely to produce clashes that you can only
avoid by restricting your character set to one case.
> One way to deal with this is to make the UTF-8->UTF-16 converter
> translate any errors in UTF-8 encoding by looking up each byte in the
> error in the current code page (or just hard-code CP1252) and use
> that. This allows it to continue to work with code that has
> extended-ASCII filenames as well as UTF-8 (except for the very low
> chance that the filename happens to have the bytes arranged such that
> they are a valid UTF-8 character, this is almost impossible for a
> human-readable name in an extended ASCII). IMHO 90% of the problems
> with I18N is that programmers don't do this, preventing a seamless
> transition to UTF-8 where you can gradually migrate your text.
>
>
> On Wed, Dec 27, 2017 at 12:24 AM, Uli Schlachter <psychon at znc.in> wrote:
>> Hi,
>>
>> I can't answer your question, but I have a question to you: What does
>> your application do if the file name cannot be expressed in the current
>> codepage?
>>
>> Cheers,
>> Uli
>>
>> On 26.12.2017 22:10, Mikael Claesson wrote:
>>> Hi,
>>> What is the recommended way of dealing with the "Use UTF-8 filenames on
>>> Windows" change? Will that not break API/ABI? In my application I currently
>>> have code in place to ensure that the file names are encoded in the current
>>> codepage. I guess I will now have to first check which cairo version the
>>> user has, and then convert as needed? Are all applications expected to do
>>> this?
>>> Best regards,
>>> Mikael
>>>
>>>
>>> On Tuesday, December 12, 2017, 2:06:42 AM GMT+1, Bryce Harrington
>>> <bryce at osg.samsung.com> wrote:
>>>
>>> A new cairo snapshot 1.15.10 is now available from:
>>>
>>> http://cairographics.org/snapshots/cairo-1.15.10.tar.xz
>>>
>>> which can be verified with:
>>>
>>> http://cairographics.org/snapshots/cairo-1.15.10.tar.xz.sha1
>>> de180498ac563249b93ee5e17ba9aa26f90644b3 cairo-1.15.10.tar.xz
>>>
>>> http://cairographics.org/snapshots/cairo-1.15.10.tar.xz.sha1.asc
>>> (signed by Bryce Harrington)
>>>
>>> Additionally, a git clone of the source tree:
>>>
>>> git clone git://git.cairographics.org/git/cairo
>>>
>>> will include a signed 1.15.10 tag which points to a commit named:
>>> 95c464d5feaae58b6cc0990434ce2498cc315dc6
>>>
>>> which can be verified with:
>>> git verify-tag 1.15.10
>>>
>>> and can be checked out with a command such as:
>>> git checkout -b build 1.15.10
>>>
>>>
>>> Release 1.15.10 (2017-12-07 Bryce Harrington <bryce at osg.samsung.com>)
>>> ========================================================================
>>> This release adds GLESv3 support to the cairo_gl backend, adds
>>> tracking of SVG units in generated svg documents, and cleans up numerous
>>> test failures and related issues in the PDF and Postscript backends.
>>>
>>> For a complete log of changes, please see
>>>
>>> http://cairographics.org/releases/ChangeLog.1.15.10
>>>
>>> Features and Enhancements
>>> -------------------------
>>> * Add support for OpenGL ES 3.0 to the gl backend.
>>> * Use Reusable streams for forms in Level 3 Postscript.
>>> * Add CAIRO_MIME_TYPE_EPS mime type for embedding EPS files.
>>> * Add CCITT_FAX mime type for PDF and PS surfaces
>>> * svg: add a new function to specify the SVG document unit
>>> (Bug #90166)
>>> * Use UTF-8 filenames on Windows
>>>
>>> API Changes
>>> -----------
>>> * cairo_svg_surface_set_document_unit() and
>>> cairo_svg_surface_get_document_unit()
>>>
>>> Dependency Changes
>>> ------------------
>>> None
>>>
>>> Performance Optimizations
>>> -------------------------
>>> None
>>>
>>> Bug Fixes
>>> ---------
>>> * Fix regression in gles version detection
>>> * Fix undefined-behavior with integer math.
>>> * Handle SOURCE and CLEAR operators when painting color glyphs.
>>> (Bug #102661)
>>> * Convert images to rgba or a8 formats when uploading with GLESv2
>>> * Use _WIN32 instead of windows.h to check for windows build.
>>> * Fix sigabrt printing documents with fonts lacking the mandatory .nodef
>>> glyph.
>>> (Bug #102922)
>>> * Prevent curved strokes in small ctms from being culled from vector
>>> surfaces
>>> (Bug #103071)
>>> * Fix painting an unbounded recording surface with the SVG backend.
>>> * Fix falling back to system font with PDFs using certain embedded
>>> fonts, due to truncated font names.
>>> (Bug #103249)
>>> * Fix handling of truetype fonts with excessively long font names
>>> (Bug #103249)
>>> * Fix race conditions with cairo_mask_compositor_t
>>> (Bug #103037)
>>> * Fix build error with util/font-view
>>> * Fix assertion hit with PDFs using Type 4 fonts rendered with user
>>> fonts, due to error when destroying glyph page.
>>> (Bug #103335)
>>> * Set default creation date for PDFs
>>> * Prevent invalid ptr access for > 4GB images.
>>> (Bug #98165)
>>> * Prevent self-copy infinite loop in Postscript surface.
>>> * Fix padded image crash in Postscript surface.
>>> * Fix annotation bugs in PDFs and related memory leaks
>>> * Fix test failures and other assorted issues in ps and pdf code.
>>> * Fix code generation when using GCC legacy atomic operations
>>> (Bug #103559)
>>> * Fix various compilation warnings and errors.
>>> * Fix various distcheck errors with private symbols, doxygen formatting,
>>> etc.
>>>
>>> See below for a complete log of changes since 1.15.8, or see:
>>>
>>> http://cairographics.org/releases/ChangeLog.cairo-1.15.10
>>>
>>>
>>>
>>> What is cairo
>>> -------------
>>> Cairo is a 2D graphics library with support for multiple output
>>> devices. Currently supported output targets include the X Window
>>> System (via both Xlib and XCB), quartz, win32, and image buffers,
>>> as well as PDF, PostScript, and SVG file output. Experimental backends
>>> include OpenGL, BeOS, OS/2, and DirectFB.
>>>
>>> Cairo is free software and is available to be redistributed and/or
>>> modified under the terms of either the GNU Lesser General Public
>>> License (LGPL) version 2.1 or the Mozilla Public License (MPL) version
>>> 1.1.
>>>
>>>
>>> Where to get more information about cairo
>>> -----------------------------------------
>>> The primary source of information about cairo is:
>>>
>>> http://cairographics.org/
>>>
>>> The latest versions of cairo can always be found at:
>>>
>>> http://cairographics.org/download
>>>
>>> Documentation on using cairo and frequently-asked questions:
>>>
>>> http://cairographics.org/documentation
>>> http://cairographics.org/FAQ
>>>
>>>
>>> Mailing lists for contacting cairo users and developers:
>>>
>>> http://cairographics.org/lists
>>>
>>> Roadmap and unscheduled things to do, (please feel free to help out):
>>>
>>> http://cairographics.org/roadmap
>>> http://cairographics.org/todo
>>>
>>>
>>>
>>> Changes since 1.15.8
>>> --------------------
>>>
>>> Adrian Johnson (47):
>>> RELEASING: use correct branch name
>>> Remove unused variable
>>> build: use _WIN32 instead of windows.h to check for windows build
>>> replace _BSD_SOURCE with _DEFAULT_SOURCE
>>> factor out ascii to double code in cff-subset into _cairo_strtod
>>> truetype: reserve space in subset arrays for .notdef
>>> truetype: clarify glyph count variables
>>> Prevent curved strokes in small ctms from being culled from vector
>>> surfaces
>>> svg: fix painting an unbounded recording surface
>>> output-stream: allow %s strings larger than 512 chars
>>> truetype: limit font name to 127 chars
>>> svg: use hash table instead of user_data to track emitted surfaces
>>> svg: source surface hash table does not need to hold the source
>>> svg2png: remove unused headers
>>> ft: prevent unused var warning when freetype < 2.8
>>> fix unused function warnings
>>> svg: recording_surface is needed even if not emitted
>>> fix warning: variable X might be clobbered by 'longjmp'
>>> fix warning: inlining failed in call to '_csi_stack_push'
>>> util/font-view: fix build error
>>> Add CCITT_FAX mime type for PDF and PS surfaces
>>> Allow mime image to be different size to cairo image
>>> pdf: set ca/CA instead of using an smask when the mask has constant
>>> alpha
>>> pdf: set default create date
>>> pdf: remove old comment
>>> image: prevent invalid ptr access for > 4GB images
>>> Add mime-unique-id test
>>> pdf: fix mime-unique-id bounded recording test
>>> pdf: fix mime-unique-id unbounded recording test
>>> pdf: fix mime-unique-id jpeg attached to recording test
>>> ps: emit base85 strings instead of strings of base85
>>> ps: remove unused prolog
>>> ps: use << >> for dictionaries instead of dict begin end
>>> ps: don't acquire image or snapshot in
>>> acquire_source_image_from_pattern
>>> ps: use forms for surfaces with UNIQUE_ID mime type
>>> ps: use Reusable streams for forms in Level 3
>>> ps: add CAIRO_MIME_TYPE_EPS mime type for embedding EPS files
>>> test: use CAIRO_MIME_TYPE_UNIQUE_ID with record-text-transform
>>> ps: prevent self-copy infinite loop
>>> ps: fix padded image crash
>>> ps: fix extend-*-similar failures
>>> test: update some stale ref images
>>> pdf: fix document structure for non tagged structures
>>> ps: fix compile with old versions of MSVC
>>> pdf: fix some annotation bugs
>>> Prevent -Wundef warnings in when cairo-ft.h is used without
>>> fontconfig
>>> ps: fix compile warning
>>>
>>> Aleksander Morgado (1):
>>> build: fix minor typo in autogen.sh
>>>
>>> Antonio Ospite (2):
>>> svg: add a new function to specify the SVG document unit
>>> svg: fix compilation with MSVC which doesn't support C99
>>> initializers
>>>
>>> Behdad Esfahbod (2):
>>> Fix undefined-behavior with integer math
>>> Handle SOURCE and CLEAR operators when painting color glyphs
>>>
>>> Bryce Harrington (15):
>>> Bump version for new development tree, 1.15.9
>>> glesv2: Fix regression in gles version detection
>>> gl: Convert images to rgba or a8 formats when uploading with GLESv2
>>> gl: Make _cairo_gl_ensure_framebuffer a private shared routine
>>> gl: Add support for OpenGL ES 3.0
>>> Factor out the ISFINITE() macro
>>> configure: Check for typeof
>>> Un-doxygen disabled cairo_set_opacity
>>> image: Fix include for use of ptrdiff
>>> win32: Fix since field version number
>>> Fix various doxygen warnings found by check-doc-syntax.sh
>>> Fix distcheck errors on use of #ifdef
>>> pattern: Mark a private routine as cairo_private.
>>> 1.15.10 release
>>> Bump version for new development tree, 1.15.9
>>>
>>> Carlos Garcia Campos (1):
>>> scaled-font: Fix assert when destroying glyph page
>>>
>>> Mikhail Fludkov (2):
>>> Surround initialisations with atomic critical section
>>> Fix code generation when using GCC legacy atomic operations
>>>
>>> Tom Schoonjans (1):
>>> Use UTF-8 filenames on Windows
>>>
>>>
>>>
>>
>>
>> --
>> "In the beginning the Universe was created. This has made a lot of
>> people very angry and has been widely regarded as a bad move."
>
>> --
>> cairo mailing list
>> cairo at cairographics.org
>> https://lists.cairographics.org/mailman/listinfo/cairo
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