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Po Lu 494bedde32 Bring up the sfnt-android font driver
* configure.ac (ANDROID_CFLAGS): Add sfnt-related font objects
to ANDROID_OBJ when not building stubs.
* lisp/startup.el (android-fonts-enumerated): New variable.
(normal-top-level): Set it.  Also enumerate fonts as early as
possible upon startup.

* src/alloc.c (cleanup_vector): Only finalize Android font
entities.
(garbage_collect): Mark sfntfont.c.

* src/android.c (struct android_emacs_drawable): New field
`damage_rect'.
(android_init_emacs_drawable): Initialize
Lorg/gnu/emacs/EmacsDrawable;#damageRect(Landroid/graphics/rect;)V.
(android_create_gc): Initialize cached GC fields.
(android_free_gc): Free cached GC clip rectangles.
(android_change_gc): Cache fields as appropriate.
(android_set_clip_rectangles): Set cached clip rectangles for
easy access from C.
(android_get_gc_values): Use cached values.
(android_get_image): Remove obsolete comment.
(android_lock_bitmap, android_damage_window): New functions that
don't parallel anything on X.

* src/android.h: Update prototypes.

* src/androidfns.c (android_default_font_parameter): Set Droid
Sans Mono as the default monospace font.
(Fx_create_frame): Register the sfntfont driver.

* src/androidgui.h (struct android_gc): Add C side caches for
clip rectangles and the foreground and background colors.

* src/androidterm.h: Update prototypes.

* src/dispextern.h (struct gui_box): New struct.
(gui_union_rectangles): New function.

* src/emacs.c (android_emacs_init): Initialize Android font
stuff late.
* src/font.c (font_make_entity): Clear `is_android' field on
Android.
(font_make_entity_android): Set `is_android' field.
* src/font.h (struct font_entity): New field `is_android'.

* src/print.c (print_vectorlike): Don't print private data,
which could include Lisp_Misc.

* src/sfnt.c (sfnt_read_cmap_format_0, sfnt_read_cmap_format_2)
(sfnt_read_cmap_format_4, sfnt_read_cmap_format_6)
(sfnt_read_cmap_format_8, sfnt_read_cmap_format_12): Remove
buggy pragmas.
(sfnt_lookup_glyph_4_1): New function.
(sfnt_lookup_glyph_4): Handle malformed lookup tables found on
Android.
(sfnt_lookup_glyph): Fix overflow problems in glyph checks.
(sfnt_read_glyph): Handle empty glyphs.  This implements some
behavior which everyone else seems to as well, but I can't find
documented in the TrueType Reference Manual.
(sfnt_free_glyph): Export correctly.
(sfnt_transform_coordinates): Make faster.
(sfnt_lerp_half): Fix lerping in some cases.
(sfnt_decompose_glyph): Handle empty glyphs correctly.  Close
contours manually instead of waiting for the edge building
process to do that.  This lets curves be handled correctly.
(struct sfnt_build_glyph_outline_context): Move internal struct
back to sfnt.c.
(sfnt_build_append): Fix detection of initial entry.
(sfnt_curve_to_and_build_1): Fix De Casteljau implementation.
(sfnt_curve_to_and_build): Use fixed point arithmetic to scale
outlines.
(sfnt_build_glyph_outline): Clear reference counts.  Use fixed
point arithmetic.
(sfnt_prepare_raster): Align rasters to 4 bytes,
SFNT_POLY_ALIGNMENT.  Fix calculation of offx and offy.
(sfnt_step_edge_by): Step edge by previously computed step_x.
(sfnt_build_outline_edges): Adjust for already closed contours.
Ignore edges abandoned after grid fit.  Also precompute step_x
to avoid multiplication on each span rastered.
(sfnt_poly_edges): Improve alignment.
(sfnt_fill_span): Rewrite to avoid control flow in while loop.
(sfnt_poly_span): Remove unnecessary code.
(sfnt_raster_glyph_outline): Use raster stride instead of width.
(sfnt_test_edge, sfnt_test_raster, main): Improve debugging
code.

* src/sfnt.h (struct sfnt_glyph_outline): Add refcount field to
outline.
(struct sfnt_build_glyph_outline_context): Remove private
struct.
(struct sfnt_raster): Add refcount field to raster.
(struct sfnt_edge): Improve doc.  Add `source_x' field used when
built with TEST.
(SFNT_CEIL_FIXED): New macro.

* src/sfntfont-android.c (sfntfont_android_saturate32)
(sfntfont_android_scale32, sfntfont_android_mul8x2)
(sfntfont_android_blend, U255TO256)
(sfntfont_android_composite_bitmap, sfntfont_android_union_boxes)
(sfntfont_android_put_glyphs, sfntfont_android_get_cache): New
functions.
(android_sfntfont_driver): New font driver.
(Fandroid_enumerate_fonts): New function.
(syms_of_sfntfont_android_for_pdumper, init_sfntfont_android)
(syms_of_sfntfont_android): Initialize default fonts, special
family mapping and font driver.
* src/sfntfont.c (struct sfnt_font_desc): New fields
`char_cache', `cmap_invalid' and `subtable'.
(sfnt_setup_coding_system): Improve commentary.  Add default
branch.  Fix return value.
(sfnt_safe_encode_coding_object_1)
(sfnt_safe_encode_coding_object_2):
(sfnt_safe_encode_coding_object): Use decode_coding_object
instead of encode_coding_object.
(sfnt_decode_font_string): Adjust for rename.
(sfnt_decode_foundry_name): New function.
(sfnt_weight_descriptions, sfnt_slant_descriptions)
(sfnt_width_descriptions): Fix definitions.
(sfnt_parse_style): Make function work.
(sfnt_enum_font): Initialize designer, char-cache and subtable
platform ID.
(sfntfont_charset_for_name, mark_sfntfont)
(sfntfont_charset_for_cmap): New functions.
(syms_of_sfntfont): New variable `sfnt-default-family-alist'.

* src/sfntfont.h (_SFNTFONT_H_): Update prototypes.

* src/xdisp.c (gui_union_rectangles): New function.
2023-01-11 16:06:15 +08:00
admin Merge remote-tracking branch 'origin/master' into feature/android 2023-01-08 15:43:57 +08:00
build-aux Update from Gnulib by running admin/merge-gnulib 2023-01-06 18:05:57 -08:00
doc Add new Tramp method "toolbox" 2023-01-07 12:14:26 +01:00
etc Merge remote-tracking branch 'origin/master' into feature/android 2023-01-08 15:43:57 +08:00
java Delete unused files 2023-01-08 15:39:28 +08:00
leim ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
lib Merge remote-tracking branch 'origin/master' into feature/android 2023-01-08 15:43:57 +08:00
lib-src Merge remote-tracking branch 'origin/master' into feature/android 2023-01-08 15:43:57 +08:00
lisp Bring up the sfnt-android font driver 2023-01-11 16:06:15 +08:00
lwlib ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
m4 Update from Gnulib by running admin/merge-gnulib 2023-01-07 15:32:56 -08:00
modules ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
msdos Adjust to recent Gnulib macro renaming 2023-01-07 15:32:56 -08:00
nextstep ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
nt Merge from origin/emacs-29 2023-01-03 06:30:17 +01:00
oldXMenu ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
src Bring up the sfnt-android font driver 2023-01-11 16:06:15 +08:00
test Adjust to recent Gnulib macro renaming 2023-01-07 15:32:56 -08:00
xcompile Bring up the Android operating system and its window system 2022-12-31 18:04:18 +08:00
.clang-format ; Fix typo in .clang-format (Bug#59768) 2022-12-02 13:52:21 +01:00
.dir-locals.el Bring up the Android operating system and its window system 2022-12-31 18:04:18 +08:00
.gitattributes ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
.gitignore Merge remote-tracking branch 'origin/master' into feature/android 2023-01-02 21:38:37 +08:00
.gitlab-ci.yml ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
.mailmap * .mailmap: Fixes for Emacs 29. 2022-09-28 16:48:10 +02:00
autogen.sh ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
BUGS Prefer HTTPS to FTP and HTTP in documentation 2017-09-13 15:54:37 -07:00
ChangeLog.1 ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
ChangeLog.2 ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
ChangeLog.3 ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
config.bat ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
configure.ac Bring up the sfnt-android font driver 2023-01-11 16:06:15 +08:00
CONTRIBUTE ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
COPYING Merge from Gnulib 2017-10-01 18:31:10 -07:00
GNUmakefile ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
INSTALL ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
INSTALL.REPO ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
make-dist ; Add 2023 to copyright years. 2023-01-01 05:31:12 -05:00
Makefile.in Merge remote-tracking branch 'origin/master' into feature/android 2023-01-02 21:38:37 +08:00
README Merge from origin/emacs-29 2023-01-01 05:47:47 -05:00

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Copyright (C) 2001-2023 Free Software Foundation, Inc.
See the end of the file for license conditions.


This directory tree holds version 30.0.50 of GNU Emacs, the extensible,
customizable, self-documenting real-time display editor.

The file INSTALL in this directory says how to build and install GNU
Emacs on various systems, once you have unpacked or checked out the
entire Emacs file tree.

See the file etc/NEWS for information on new features and other
user-visible changes in recent versions of Emacs.

The file etc/PROBLEMS contains information on many common problems that
occur in building, installing and running Emacs.

The file CONTRIBUTE contains information on contributing to Emacs as a
developer.

You may encounter bugs in this release.  If you do, please report
them; your bug reports are valuable contributions to the FSF, since
they allow us to notice and fix problems on machines we don't have, or
in code we don't use often.  Please send bug reports to the mailing
list bug-gnu-emacs@gnu.org.  If possible, use M-x report-emacs-bug.

See the "Bugs" section of the Emacs manual for more information on how
to report bugs.  (The file 'BUGS' in this directory explains how you
can find and read that section using the Info files that come with
Emacs.)  For a list of mailing lists related to Emacs, see
<https://savannah.gnu.org/mail/?group=emacs>.  For the complete
list of GNU mailing lists, see <https://lists.gnu.org/>.

The 'etc' subdirectory contains several other files, named in capital
letters, which you might consider looking at when installing GNU
Emacs.

The file 'configure' is a shell script to acclimate Emacs to the
oddities of your processor and operating system.  It creates the file
'Makefile' (a script for the 'make' program), which automates the
process of building and installing Emacs.  See INSTALL for more
detailed information.

The file 'configure.ac' is the input used by the autoconf program to
construct the 'configure' script.

The shell script 'autogen.sh' generates 'configure' and other files by
running Autoconf (which in turn uses GNU m4), and configures files in
the .git subdirectory if you are using Git.  If you want to use it,
you will need to install recent versions of these build tools.  This
should be needed only if you edit files like 'configure.ac' that
specify Emacs's autobuild procedure.

The file 'Makefile.in' is a template used by 'configure' to create
'Makefile'.

The file 'make-dist' is a shell script to build a distribution tar
file from the current Emacs tree, containing only those files
appropriate for distribution.  If you make extensive changes to Emacs,
this script will help you distribute your version to others.

There are several subdirectories:

'src'       holds the C code for Emacs (the Emacs Lisp interpreter and
            its primitives, the redisplay code, and some basic editing
            functions).
'lisp'      holds the Emacs Lisp code for Emacs (most everything else).
'leim'      holds the original source files for the generated files
            in lisp/leim.  These form the library of Emacs input methods,
            required to type international characters that can't be
            directly produced by your keyboard.
'lib'       holds source code for libraries used by Emacs and its utilities
'lib-src'   holds the source code for some utility programs for use by or
            with Emacs, like movemail and etags.
'lwlib'     holds the sources of the Lucid Widget Library used on X.
'oldXMenu'  source files from X11R2 XMenu library, used in non-toolkit builds.
'etc'       holds miscellaneous architecture-independent data files Emacs
            uses, like the tutorial text and tool bar images.
            The contents of the 'lisp', 'leim', 'info', and 'doc'
            subdirectories are architecture-independent too.
'info'      holds the Info documentation tree for Emacs.
'doc/emacs' holds the source code for the Emacs Manual.  If you modify the
            manual sources, you will need the 'makeinfo' program to produce
            an updated manual.  'makeinfo' is part of the GNU Texinfo
            package; you need a suitably recent version of Texinfo.
'doc/lispref'   holds the source code for the Emacs Lisp reference manual.
'doc/lispintro' holds the source code for the Introduction to Programming
                in Emacs Lisp manual.
'msdos'     holds configuration files for compiling Emacs under MS-DOS.
'nextstep'  holds instructions and some other files for compiling the
            Nextstep port of Emacs, for GNUstep and macOS Cocoa.
'nt'        holds code and documentation for building Emacs on MS-Windows.
'test'      holds tests for various aspects of Emacs's functionality.
'modules'   holds the modhelp.py helper script.
'admin'     holds files used by Emacs developers, and Unicode data files.
'build-aux' holds auxiliary files used during the build.
'm4'        holds Autoconf macros used for generating the configure script.

   Building Emacs on non-Posix platforms requires tools that aren't part
of the standard distribution of the OS.  The platform-specific README
files and installation instructions should list the required tools.


NOTE ON COPYRIGHT YEARS

In copyright notices where the copyright holder is the Free Software
Foundation, then where a range of years appears, this is an inclusive
range that applies to every year in the range.  For example: 2005-2008
represents the years 2005, 2006, 2007, and 2008.


This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.