office-gobmx/vcl
Khaled Hosny b760eff8cb Add support for using HarfBuzz instead of ICU LE
HarfBuzz is an up to date, actively maintained OpenType layout engine,
while the ICU LayoutEngine we use now has been unmaintained for a
while now, and existing users are encouraged to switch to HarfBuzz.

This is work in progress, text layout mostly works, but the handling
of combining marks is broken and needs further work, so it is kept
optional for now, with SAL_USE_HARFBUZZ env variable to enable it at
runtime.

Change-Id: I07e698f7486379bae68329771695cd94d6e561b5
Reviewed-on: https://gerrit.libreoffice.org/3518
Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>
2013-04-23 09:23:27 +00:00
..
android Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
aqua/source remove unused component_canUnload functions 2013-04-19 16:52:03 +02:00
coretext Turn off subpixel positioning for now 2013-04-12 02:24:45 +03:00
generic Add support for using HarfBuzz instead of ICU LE 2013-04-23 09:23:27 +00:00
headless Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
inc rhbz#954991 Avoid static data (causing trouble at exit) 2013-04-22 16:21:57 +02:00
ios Add pan gesture handling 2013-04-19 00:18:33 +03:00
null mass removal of rtl:: prefixes for O(U)String* 2013-04-07 14:23:11 +02:00
qa Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
quartz Log a null CGRect as "NULL" 2013-04-11 19:14:38 +03:00
source adjust_exif_parameters defined but not used [-Werror=unused-function] 2013-04-22 12:56:46 +02:00
test fdo#60724 correct spelling 2013-04-15 05:39:31 +02:00
uiconfig/ui
unx rhbz#954991 Avoid static data (causing trouble at exit) 2013-04-22 16:21:57 +02:00
win/source fdo#63154: Change Min/Max/Abs for std::min/max/abs 2013-04-20 11:09:54 +00:00
workben mass removal of rtl:: prefixes for O(U)String* 2013-04-07 14:23:11 +02:00
AllLangResTarget_vcl.mk unwind tangled mess around spinner buttons 2013-04-04 11:17:21 +01:00
CppunitTest_vcl_filters_test.mk Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
CustomTarget_afm_hash.mk Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
CustomTarget_kde4_moc.mk Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
CustomTarget_kde_moc.mk Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
CustomTarget_tde_moc.mk Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
Executable_kdefilepicker.mk
Executable_tdefilepicker.mk
Executable_ui-previewer.mk Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00
Library_desktop_detector.mk new module i18nlangtag 2013-04-05 19:10:48 +02:00
Library_vcl.mk Add HarfBuzz support to the build system 2013-04-23 08:00:14 +00:00
Library_vclplug_gen.mk Add HarfBuzz support to the build system 2013-04-23 08:00:14 +00:00
Library_vclplug_gtk.mk move gtkframe to gtksalframe to match class name 2013-04-17 16:25:57 +02:00
Library_vclplug_gtk3.mk vcl: conditionally link to jvmaccess 2013-04-11 07:41:30 +00:00
Library_vclplug_kde.mk vcl: conditionally link to jvmaccess 2013-04-11 07:41:30 +00:00
Library_vclplug_kde4.mk vcl: conditionally link to jvmaccess 2013-04-11 07:41:30 +00:00
Library_vclplug_svp.mk vcl: conditionally link to jvmaccess 2013-04-11 07:41:30 +00:00
Library_vclplug_tde.mk vcl: conditionally link to jvmaccess 2013-04-11 07:41:30 +00:00
Makefile
Module_vcl.mk rename UI to UIConfig 2013-04-11 03:37:30 +00:00
Package_inc.mk Exif reading/writing and Jpeg lossless transformations support. 2013-04-21 21:55:45 +02:00
README more code overview documentation. 2013-04-08 14:06:32 +01:00
StaticLibrary_headless.mk new module i18nlangtag 2013-04-05 19:10:48 +02:00
StaticLibrary_vclmain.mk add missing dep on sal/config.h 2013-03-28 08:59:25 +01:00
UIConfig_vcl.mk rename UI to UIConfig 2013-04-11 03:37:30 +00:00
vcl.android.component
vcl.headless.component
vcl.ios.component
vcl.macosx.component
vcl.unx.component
vcl.windows.component
WinResTarget_vcl.mk
Zip_osxres.mk Move to MPLv2 license headers, with ESC decision and author's permission. 2013-04-22 09:37:38 +01:00

Visual Components Library is responsible for the widgets (windowing, buttons, controls, file-pickers etc.) operating system abstraction, including basic rendering (e.g. the output device).

VCL provides a graphical toolkit similar to gtk+, Qt, SWING etc.

source/
	+ the main cross-platform chunk of source

inc/
	+ cross-platform abstraction headers
	vcl/
		+ public headers ("public" to the rest of LibreOffice, that is)

generic/
	+ shared helper code for *some* of the backends, actually built into vcl.

headless/
	+ a backend renderer that draws to bitmaps

android/
	+ Android backend (work in progress, does work to some extent)

aqua/
	+ OS X backend

ios/
	+ iOS backend (work in progres, does not work, needs re-think
	and re-write)

win/
	+ Windows backend

unx/
	+ X11 backend and its sub-platforms

	plugadapt/
		+ pluggable framework to select correct unx backend
	gtk/
		+ GTK2 support
	gtk3/
		+ GTK3.2+ support
	kde/
		+ KDE3 support
	kde4/
		+ KDE4 support
	generic/
		+ raw X11 support


How the platform abstraction works

	+ InitVCL calls 'CreateSalInstance'
		+ ths is implemented by the compiled-in platform backend
		+ it stores various bits of global state in the
		  'SalData' (inc/saldatabasic.hxx) structure but:
	+ the SalInstance vtable is the primary outward facing gateway
	  API for platform backends
		+ It is a factory for:
		  SalFrames, SalVirtualDevices, SalPrinters,
		  Timers, the SolarMutexe, Drag&Drop and other
		  objects, as well as the primary event loop wrapper.

Note: references to "SV" in the code mean StarView, which was a
portable C++ class library for GUIs, with very old roots, that was
developed by StarDivision. Nowadays it is not used by anything except
LibreOffice (and OpenOffice).