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[canvaskit] Remove support for T1 fonts and reduce code size

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We were previously building FreeType2 with the psnames module,
which included large tables of glyphnames [1]. These were only
used in code related to PDF (and only when outputting Type 1
fonts, which is very rare).

Even though the PDF backend isn't in CanvasKit, the compiler
couldn't throw away these massive tables (about 80k in all)
of strings. Since these tables were only used for T1 fonts,
it made sense to tell FreeType not to include the rest of the
T1 related code, which saved about 55k more.

If, one day, we add in support for the PDF backend to CanvasKit,
SK_PDF_DO_NOT_SUPPORT_TYPE_1_FONTS is likely something we'll
want to define.

The roll-freetype.sh is inspired by a script of the same name
in the Chromium repo and aids in the updating of freetype
and our forked config files.

[1] 0a3d2bb99b/src/psnames/pstables.h (629)

Bug: skia:9733
Change-Id: I359bab4184587cbe91400661fb012eac1a601a83
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/262232
Reviewed-by: Ben Wagner <bungeman@google.com>
This commit is contained in:
Kevin Lubick 2020-01-06 13:28:12 -05:00
parent dbc53a8af3
commit 08bf8f79f1
5 changed files with 1064 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
modules/canvaskit/CHANGELOG.md
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@ -22,6 +22,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Removed
- `SkShader.Empty`
- Support for Type 1 Fonts. These are ancient and removing them saves about 135k
of code size.
### Breaking
- In an effort to reduce code size for most clients, npm now contains two CanvasKit builds.

17
third_party/freetype2/BUILD.gn vendored
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@ -26,11 +26,18 @@ if (skia_use_system_freetype2) {
]
include_dirs = [ "." ]
defines = [
"FT2_BUILD_LIBRARY",
"FT_CONFIG_MODULES_H=<include/freetype-android/ftmodule.h>",
"FT_CONFIG_OPTIONS_H=<include/freetype-android/ftoption.h>",
]
defines = [ "FT2_BUILD_LIBRARY" ]
if (target_cpu == "wasm") {
defines += [
"FT_CONFIG_MODULES_H=<include/freetype-no-type1/ftmodule.h>",
"FT_CONFIG_OPTIONS_H=<include/freetype-no-type1/ftoption.h>",
]
} else {
defines += [
"FT_CONFIG_MODULES_H=<include/freetype-android/ftmodule.h>",
"FT_CONFIG_OPTIONS_H=<include/freetype-android/ftoption.h>",
]
}
sources = [
"../externals/freetype/src/autofit/autofit.c",

32
third_party/freetype2/include/freetype-no-type1/ftmodule.h vendored Normal file
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@ -0,0 +1,32 @@
/*
* This file registers the FreeType modules compiled into the library.
*
* If you use GNU make, this file IS NOT USED! Instead, it is created in
* the objects directory (normally `<topdir>/objs/`) based on information
* from `<topdir>/modules.cfg`.
*
* Please read `docs/INSTALL.ANY` and `docs/CUSTOMIZE` how to compile
* FreeType without GNU make.
*
*/
FT_USE_MODULE( FT_Module_Class, autofit_module_class )
FT_USE_MODULE( FT_Driver_ClassRec, tt_driver_class )
//FT_USE_MODULE( FT_Driver_ClassRec, t1_driver_class )
FT_USE_MODULE( FT_Driver_ClassRec, cff_driver_class )
//FT_USE_MODULE( FT_Driver_ClassRec, t1cid_driver_class )
//FT_USE_MODULE( FT_Driver_ClassRec, pfr_driver_class )
//FT_USE_MODULE( FT_Driver_ClassRec, t42_driver_class )
//FT_USE_MODULE( FT_Driver_ClassRec, winfnt_driver_class )
//FT_USE_MODULE( FT_Driver_ClassRec, pcf_driver_class )
FT_USE_MODULE( FT_Module_Class, psaux_module_class )
//FT_USE_MODULE( FT_Module_Class, psnames_module_class )
FT_USE_MODULE( FT_Module_Class, pshinter_module_class )
//FT_USE_MODULE( FT_Renderer_Class, ft_raster1_renderer_class )
FT_USE_MODULE( FT_Module_Class, sfnt_module_class )
FT_USE_MODULE( FT_Renderer_Class, ft_smooth_renderer_class )
FT_USE_MODULE( FT_Renderer_Class, ft_smooth_lcd_renderer_class )
FT_USE_MODULE( FT_Renderer_Class, ft_smooth_lcdv_renderer_class )
//FT_USE_MODULE( FT_Driver_ClassRec, bdf_driver_class )
/* EOF */

982
third_party/freetype2/include/freetype-no-type1/ftoption.h vendored Normal file
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@ -0,0 +1,982 @@
/****************************************************************************
*
* ftoption.h
*
* User-selectable configuration macros (specification only).
*
* Copyright (C) 1996-2019 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/
#ifndef FTOPTION_H_
#define FTOPTION_H_
#include <ft2build.h>
FT_BEGIN_HEADER
/**************************************************************************
*
* USER-SELECTABLE CONFIGURATION MACROS
*
* This file contains the default configuration macro definitions for a
* standard build of the FreeType library. There are three ways to use
* this file to build project-specific versions of the library:
*
* - You can modify this file by hand, but this is not recommended in
* cases where you would like to build several versions of the library
* from a single source directory.
*
* - You can put a copy of this file in your build directory, more
* precisely in `$BUILD/freetype/config/ftoption.h`, where `$BUILD` is
* the name of a directory that is included _before_ the FreeType include
* path during compilation.
*
* The default FreeType Makefiles and Jamfiles use the build directory
* `builds/<system>` by default, but you can easily change that for your
* own projects.
*
* - Copy the file <ft2build.h> to `$BUILD/ft2build.h` and modify it
* slightly to pre-define the macro `FT_CONFIG_OPTIONS_H` used to locate
* this file during the build. For example,
*
* ```
* #define FT_CONFIG_OPTIONS_H <myftoptions.h>
* #include <freetype/config/ftheader.h>
* ```
*
* will use `$BUILD/myftoptions.h` instead of this file for macro
* definitions.
*
* Note also that you can similarly pre-define the macro
* `FT_CONFIG_MODULES_H` used to locate the file listing of the modules
* that are statically linked to the library at compile time. By
* default, this file is `<freetype/config/ftmodule.h>`.
*
* We highly recommend using the third method whenever possible.
*
*/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** G E N E R A L F R E E T Y P E 2 C O N F I G U R A T I O N ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*#************************************************************************
*
* If you enable this configuration option, FreeType recognizes an
* environment variable called `FREETYPE_PROPERTIES`, which can be used to
* control the various font drivers and modules. The controllable
* properties are listed in the section @properties.
*
* You have to undefine this configuration option on platforms that lack
* the concept of environment variables (and thus don't have the `getenv`
* function), for example Windows CE.
*
* `FREETYPE_PROPERTIES` has the following syntax form (broken here into
* multiple lines for better readability).
*
* ```
* <optional whitespace>
* <module-name1> ':'
* <property-name1> '=' <property-value1>
* <whitespace>
* <module-name2> ':'
* <property-name2> '=' <property-value2>
* ...
* ```
*
* Example:
*
* ```
* FREETYPE_PROPERTIES=truetype:interpreter-version=35 \
* cff:no-stem-darkening=1 \
* autofitter:warping=1
* ```
*
*/
#define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
/**************************************************************************
*
* Uncomment the line below if you want to activate LCD rendering
* technology similar to ClearType in this build of the library. This
* technology triples the resolution in the direction color subpixels. To
* mitigate color fringes inherent to this technology, you also need to
* explicitly set up LCD filtering.
*
* Note that this feature is covered by several Microsoft patents and
* should not be activated in any default build of the library. When this
* macro is not defined, FreeType offers alternative LCD rendering
* technology that produces excellent output without LCD filtering.
*/
/* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
/**************************************************************************
*
* Many compilers provide a non-ANSI 64-bit data type that can be used by
* FreeType to speed up some computations. However, this will create some
* problems when compiling the library in strict ANSI mode.
*
* For this reason, the use of 64-bit integers is normally disabled when
* the `__STDC__` macro is defined. You can however disable this by
* defining the macro `FT_CONFIG_OPTION_FORCE_INT64` here.
*
* For most compilers, this will only create compilation warnings when
* building the library.
*
* ObNote: The compiler-specific 64-bit integers are detected in the
* file `ftconfig.h` either statically or through the `configure`
* script on supported platforms.
*/
#undef FT_CONFIG_OPTION_FORCE_INT64
/**************************************************************************
*
* If this macro is defined, do not try to use an assembler version of
* performance-critical functions (e.g., @FT_MulFix). You should only do
* that to verify that the assembler function works properly, or to execute
* benchmark tests of the various implementations.
*/
/* #define FT_CONFIG_OPTION_NO_ASSEMBLER */
/**************************************************************************
*
* If this macro is defined, try to use an inlined assembler version of the
* @FT_MulFix function, which is a 'hotspot' when loading and hinting
* glyphs, and which should be executed as fast as possible.
*
* Note that if your compiler or CPU is not supported, this will default to
* the standard and portable implementation found in `ftcalc.c`.
*/
#define FT_CONFIG_OPTION_INLINE_MULFIX
/**************************************************************************
*
* LZW-compressed file support.
*
* FreeType now handles font files that have been compressed with the
* `compress` program. This is mostly used to parse many of the PCF
* files that come with various X11 distributions. The implementation
* uses NetBSD's `zopen` to partially uncompress the file on the fly (see
* `src/lzw/ftgzip.c`).
*
* Define this macro if you want to enable this 'feature'.
*/
#define FT_CONFIG_OPTION_USE_LZW
/**************************************************************************
*
* Gzip-compressed file support.
*
* FreeType now handles font files that have been compressed with the
* `gzip` program. This is mostly used to parse many of the PCF files
* that come with XFree86. The implementation uses 'zlib' to partially
* uncompress the file on the fly (see `src/gzip/ftgzip.c`).
*
* Define this macro if you want to enable this 'feature'. See also the
* macro `FT_CONFIG_OPTION_SYSTEM_ZLIB` below.
*/
#define FT_CONFIG_OPTION_USE_ZLIB
/**************************************************************************
*
* ZLib library selection
*
* This macro is only used when `FT_CONFIG_OPTION_USE_ZLIB` is defined.
* It allows FreeType's 'ftgzip' component to link to the system's
* installation of the ZLib library. This is useful on systems like
* Unix or VMS where it generally is already available.
*
* If you let it undefined, the component will use its own copy of the
* zlib sources instead. These have been modified to be included
* directly within the component and **not** export external function
* names. This allows you to link any program with FreeType _and_ ZLib
* without linking conflicts.
*
* Do not `#undef` this macro here since the build system might define
* it for certain configurations only.
*
* If you use a build system like cmake or the `configure` script,
* options set by those programs have precedence, overwriting the value
* here with the configured one.
*/
/* #define FT_CONFIG_OPTION_SYSTEM_ZLIB */
/**************************************************************************
*
* Bzip2-compressed file support.
*
* FreeType now handles font files that have been compressed with the
* `bzip2` program. This is mostly used to parse many of the PCF files
* that come with XFree86. The implementation uses `libbz2` to partially
* uncompress the file on the fly (see `src/bzip2/ftbzip2.c`). Contrary
* to gzip, bzip2 currently is not included and need to use the system
* available bzip2 implementation.
*
* Define this macro if you want to enable this 'feature'.
*
* If you use a build system like cmake or the `configure` script,
* options set by those programs have precedence, overwriting the value
* here with the configured one.
*/
/* #define FT_CONFIG_OPTION_USE_BZIP2 */
/**************************************************************************
*
* Define to disable the use of file stream functions and types, `FILE`,
* `fopen`, etc. Enables the use of smaller system libraries on embedded
* systems that have multiple system libraries, some with or without file
* stream support, in the cases where file stream support is not necessary
* such as memory loading of font files.
*/
/* #define FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT */
/**************************************************************************
*
* PNG bitmap support.
*
* FreeType now handles loading color bitmap glyphs in the PNG format.
* This requires help from the external libpng library. Uncompressed
* color bitmaps do not need any external libraries and will be supported
* regardless of this configuration.
*
* Define this macro if you want to enable this 'feature'.
*
* If you use a build system like cmake or the `configure` script,
* options set by those programs have precedence, overwriting the value
* here with the configured one.
*/
#define FT_CONFIG_OPTION_USE_PNG
/**************************************************************************
*
* HarfBuzz support.
*
* FreeType uses the HarfBuzz library to improve auto-hinting of OpenType
* fonts. If available, many glyphs not directly addressable by a font's
* character map will be hinted also.
*
* Define this macro if you want to enable this 'feature'.
*
* If you use a build system like cmake or the `configure` script,
* options set by those programs have precedence, overwriting the value
* here with the configured one.
*/
/* #define FT_CONFIG_OPTION_USE_HARFBUZZ */
/**************************************************************************
*
* Glyph Postscript Names handling
*
* By default, FreeType 2 is compiled with the 'psnames' module. This
* module is in charge of converting a glyph name string into a Unicode
* value, or return a Macintosh standard glyph name for the use with the
* TrueType 'post' table.
*
* Undefine this macro if you do not want 'psnames' compiled in your
* build of FreeType. This has the following effects:
*
* - The TrueType driver will provide its own set of glyph names, if you
* build it to support postscript names in the TrueType 'post' table,
* but will not synthesize a missing Unicode charmap.
*
* - The Type~1 driver will not be able to synthesize a Unicode charmap
* out of the glyphs found in the fonts.
*
* You would normally undefine this configuration macro when building a
* version of FreeType that doesn't contain a Type~1 or CFF driver.
*/
/* #define FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
/**************************************************************************
*
* Postscript Names to Unicode Values support
*
* By default, FreeType~2 is built with the 'psnames' module compiled in.
* Among other things, the module is used to convert a glyph name into a
* Unicode value. This is especially useful in order to synthesize on
* the fly a Unicode charmap from the CFF/Type~1 driver through a big
* table named the 'Adobe Glyph List' (AGL).
*
* Undefine this macro if you do not want the Adobe Glyph List compiled
* in your 'psnames' module. The Type~1 driver will not be able to
* synthesize a Unicode charmap out of the glyphs found in the fonts.
*/
/* #define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST */
/**************************************************************************
*
* Support for Mac fonts
*
* Define this macro if you want support for outline fonts in Mac format
* (mac dfont, mac resource, macbinary containing a mac resource) on
* non-Mac platforms.
*
* Note that the 'FOND' resource isn't checked.
*/
#define FT_CONFIG_OPTION_MAC_FONTS
/**************************************************************************
*
* Guessing methods to access embedded resource forks
*
* Enable extra Mac fonts support on non-Mac platforms (e.g., GNU/Linux).
*
* Resource forks which include fonts data are stored sometimes in
* locations which users or developers don't expected. In some cases,
* resource forks start with some offset from the head of a file. In
* other cases, the actual resource fork is stored in file different from
* what the user specifies. If this option is activated, FreeType tries
* to guess whether such offsets or different file names must be used.
*
* Note that normal, direct access of resource forks is controlled via
* the `FT_CONFIG_OPTION_MAC_FONTS` option.
*/
#ifdef FT_CONFIG_OPTION_MAC_FONTS
#define FT_CONFIG_OPTION_GUESSING_EMBEDDED_RFORK
#endif
/**************************************************************************
*
* Allow the use of `FT_Incremental_Interface` to load typefaces that
* contain no glyph data, but supply it via a callback function. This is
* required by clients supporting document formats which supply font data
* incrementally as the document is parsed, such as the Ghostscript
* interpreter for the PostScript language.
*/
#define FT_CONFIG_OPTION_INCREMENTAL
/**************************************************************************
*
* The size in bytes of the render pool used by the scan-line converter to
* do all of its work.
*/
#define FT_RENDER_POOL_SIZE 16384L
/**************************************************************************
*
* FT_MAX_MODULES
*
* The maximum number of modules that can be registered in a single
* FreeType library object. 32~is the default.
*/
#define FT_MAX_MODULES 32
/**************************************************************************
*
* Debug level
*
* FreeType can be compiled in debug or trace mode. In debug mode,
* errors are reported through the 'ftdebug' component. In trace mode,
* additional messages are sent to the standard output during execution.
*
* Define `FT_DEBUG_LEVEL_ERROR` to build the library in debug mode.
* Define `FT_DEBUG_LEVEL_TRACE` to build it in trace mode.
*
* Don't define any of these macros to compile in 'release' mode!
*
* Do not `#undef` these macros here since the build system might define
* them for certain configurations only.
*/
/* #define FT_DEBUG_LEVEL_ERROR */
/* #define FT_DEBUG_LEVEL_TRACE */
/**************************************************************************
*
* Autofitter debugging
*
* If `FT_DEBUG_AUTOFIT` is defined, FreeType provides some means to
* control the autofitter behaviour for debugging purposes with global
* boolean variables (consequently, you should **never** enable this
* while compiling in 'release' mode):
*
* ```
* _af_debug_disable_horz_hints
* _af_debug_disable_vert_hints
* _af_debug_disable_blue_hints
* ```
*
* Additionally, the following functions provide dumps of various
* internal autofit structures to stdout (using `printf`):
*
* ```
* af_glyph_hints_dump_points
* af_glyph_hints_dump_segments
* af_glyph_hints_dump_edges
* af_glyph_hints_get_num_segments
* af_glyph_hints_get_segment_offset
* ```
*
* As an argument, they use another global variable:
*
* ```
* _af_debug_hints
* ```
*
* Please have a look at the `ftgrid` demo program to see how those
* variables and macros should be used.
*
* Do not `#undef` these macros here since the build system might define
* them for certain configurations only.
*/
/* #define FT_DEBUG_AUTOFIT */
/**************************************************************************
*
* Memory Debugging
*
* FreeType now comes with an integrated memory debugger that is capable
* of detecting simple errors like memory leaks or double deletes. To
* compile it within your build of the library, you should define
* `FT_DEBUG_MEMORY` here.
*
* Note that the memory debugger is only activated at runtime when when
* the _environment_ variable `FT2_DEBUG_MEMORY` is defined also!
*
* Do not `#undef` this macro here since the build system might define it
* for certain configurations only.
*/
/* #define FT_DEBUG_MEMORY */
/**************************************************************************
*
* Module errors
*
* If this macro is set (which is _not_ the default), the higher byte of
* an error code gives the module in which the error has occurred, while
* the lower byte is the real error code.
*
* Setting this macro makes sense for debugging purposes only, since it
* would break source compatibility of certain programs that use
* FreeType~2.
*
* More details can be found in the files `ftmoderr.h` and `fterrors.h`.
*/
#undef FT_CONFIG_OPTION_USE_MODULE_ERRORS
/**************************************************************************
*
* Error Strings
*
* If this macro is set, `FT_Error_String` will return meaningful
* descriptions. This is not enabled by default to reduce the overall
* size of FreeType.
*
* More details can be found in the file `fterrors.h`.
*/
/* #define FT_CONFIG_OPTION_ERROR_STRINGS */
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** S F N T D R I V E R C O N F I G U R A T I O N ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_EMBEDDED_BITMAPS` if you want to support
* embedded bitmaps in all formats using the 'sfnt' module (namely
* TrueType~& OpenType).
*/
#define TT_CONFIG_OPTION_EMBEDDED_BITMAPS
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_COLOR_LAYERS` if you want to support coloured
* outlines (from the 'COLR'/'CPAL' tables) in all formats using the 'sfnt'
* module (namely TrueType~& OpenType).
*/
#define TT_CONFIG_OPTION_COLOR_LAYERS
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_POSTSCRIPT_NAMES` if you want to be able to
* load and enumerate the glyph Postscript names in a TrueType or OpenType
* file.
*
* Note that when you do not compile the 'psnames' module by undefining the
* above `FT_CONFIG_OPTION_POSTSCRIPT_NAMES`, the 'sfnt' module will
* contain additional code used to read the PS Names table from a font.
*
* (By default, the module uses 'psnames' to extract glyph names.)
*/
#define TT_CONFIG_OPTION_POSTSCRIPT_NAMES
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_SFNT_NAMES` if your applications need to access
* the internal name table in a SFNT-based format like TrueType or
* OpenType. The name table contains various strings used to describe the
* font, like family name, copyright, version, etc. It does not contain
* any glyph name though.
*
* Accessing SFNT names is done through the functions declared in
* `ftsnames.h`.
*/
#define TT_CONFIG_OPTION_SFNT_NAMES
/**************************************************************************
*
* TrueType CMap support
*
* Here you can fine-tune which TrueType CMap table format shall be
* supported.
*/
#define TT_CONFIG_CMAP_FORMAT_0
#define TT_CONFIG_CMAP_FORMAT_2
#define TT_CONFIG_CMAP_FORMAT_4
#define TT_CONFIG_CMAP_FORMAT_6
#define TT_CONFIG_CMAP_FORMAT_8
#define TT_CONFIG_CMAP_FORMAT_10
#define TT_CONFIG_CMAP_FORMAT_12
#define TT_CONFIG_CMAP_FORMAT_13
#define TT_CONFIG_CMAP_FORMAT_14
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** T R U E T Y P E D R I V E R C O N F I G U R A T I O N ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` if you want to compile a
* bytecode interpreter in the TrueType driver.
*
* By undefining this, you will only compile the code necessary to load
* TrueType glyphs without hinting.
*
* Do not `#undef` this macro here, since the build system might define it
* for certain configurations only.
*/
#define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_SUBPIXEL_HINTING` if you want to compile
* subpixel hinting support into the TrueType driver. This modifies the
* TrueType hinting mechanism when anything but `FT_RENDER_MODE_MONO` is
* requested.
*
* In particular, it modifies the bytecode interpreter to interpret (or
* not) instructions in a certain way so that all TrueType fonts look like
* they do in a Windows ClearType (DirectWrite) environment. See [1] for a
* technical overview on what this means. See `ttinterp.h` for more
* details on the LEAN option.
*
* There are three possible values.
*
* Value 1:
* This value is associated with the 'Infinality' moniker, contributed by
* an individual nicknamed Infinality with the goal of making TrueType
* fonts render better than on Windows. A high amount of configurability
* and flexibility, down to rules for single glyphs in fonts, but also
* very slow. Its experimental and slow nature and the original
* developer losing interest meant that this option was never enabled in
* default builds.
*
* The corresponding interpreter version is v38.
*
* Value 2:
* The new default mode for the TrueType driver. The Infinality code
* base was stripped to the bare minimum and all configurability removed
* in the name of speed and simplicity. The configurability was mainly
* aimed at legacy fonts like 'Arial', 'Times New Roman', or 'Courier'.
* Legacy fonts are fonts that modify vertical stems to achieve clean
* black-and-white bitmaps. The new mode focuses on applying a minimal
* set of rules to all fonts indiscriminately so that modern and web
* fonts render well while legacy fonts render okay.
*
* The corresponding interpreter version is v40.
*
* Value 3:
* Compile both, making both v38 and v40 available (the latter is the
* default).
*
* By undefining these, you get rendering behavior like on Windows without
* ClearType, i.e., Windows XP without ClearType enabled and Win9x
* (interpreter version v35). Or not, depending on how much hinting blood
* and testing tears the font designer put into a given font. If you
* define one or both subpixel hinting options, you can switch between
* between v35 and the ones you define (using `FT_Property_Set`).
*
* This option requires `TT_CONFIG_OPTION_BYTECODE_INTERPRETER` to be
* defined.
*
* [1]
* https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx
*/
/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING 1 */
#define TT_CONFIG_OPTION_SUBPIXEL_HINTING 2
/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING ( 1 | 2 ) */
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED` to compile the
* TrueType glyph loader to use Apple's definition of how to handle
* component offsets in composite glyphs.
*
* Apple and MS disagree on the default behavior of component offsets in
* composites. Apple says that they should be scaled by the scaling
* factors in the transformation matrix (roughly, it's more complex) while
* MS says they should not. OpenType defines two bits in the composite
* flags array which can be used to disambiguate, but old fonts will not
* have them.
*
* https://www.microsoft.com/typography/otspec/glyf.htm
* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html
*/
#undef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_GX_VAR_SUPPORT` if you want to include support
* for Apple's distortable font technology ('fvar', 'gvar', 'cvar', and
* 'avar' tables). Tagged 'Font Variations', this is now part of OpenType
* also. This has many similarities to Type~1 Multiple Masters support.
*/
#define TT_CONFIG_OPTION_GX_VAR_SUPPORT
/**************************************************************************
*
* Define `TT_CONFIG_OPTION_BDF` if you want to include support for an
* embedded 'BDF~' table within SFNT-based bitmap formats.
*/
#define TT_CONFIG_OPTION_BDF
/**************************************************************************
*
* Option `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES` controls the maximum
* number of bytecode instructions executed for a single run of the
* bytecode interpreter, needed to prevent infinite loops. You don't want
* to change this except for very special situations (e.g., making a
* library fuzzer spend less time to handle broken fonts).
*
* It is not expected that this value is ever modified by a configuring
* script; instead, it gets surrounded with `#ifndef ... #endif` so that
* the value can be set as a preprocessor option on the compiler's command
* line.
*/
#ifndef TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES
#define TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES 1000000L
#endif
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** T Y P E 1 D R I V E R C O N F I G U R A T I O N ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* `T1_MAX_DICT_DEPTH` is the maximum depth of nest dictionaries and arrays
* in the Type~1 stream (see `t1load.c`). A minimum of~4 is required.
*/
#define T1_MAX_DICT_DEPTH 5
/**************************************************************************
*
* `T1_MAX_SUBRS_CALLS` details the maximum number of nested sub-routine
* calls during glyph loading.
*/
#define T1_MAX_SUBRS_CALLS 16
/**************************************************************************
*
* `T1_MAX_CHARSTRING_OPERANDS` is the charstring stack's capacity. A
* minimum of~16 is required.
*
* The Chinese font 'MingTiEG-Medium' (covering the CNS 11643 character
* set) needs 256.
*/
#define T1_MAX_CHARSTRINGS_OPERANDS 256
/**************************************************************************
*
* Define this configuration macro if you want to prevent the compilation
* of the 't1afm' module, which is in charge of reading Type~1 AFM files
* into an existing face. Note that if set, the Type~1 driver will be
* unable to produce kerning distances.
*/
#undef T1_CONFIG_OPTION_NO_AFM
/**************************************************************************
*
* Define this configuration macro if you want to prevent the compilation
* of the Multiple Masters font support in the Type~1 driver.
*/
#undef T1_CONFIG_OPTION_NO_MM_SUPPORT
/**************************************************************************
*
* `T1_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe Type~1
* engine gets compiled into FreeType. If defined, it is possible to
* switch between the two engines using the `hinting-engine` property of
* the 'type1' driver module.
*/
/* #define T1_CONFIG_OPTION_OLD_ENGINE */
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** C F F D R I V E R C O N F I G U R A T I O N ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* Using `CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4}` it is
* possible to set up the default values of the four control points that
* define the stem darkening behaviour of the (new) CFF engine. For more
* details please read the documentation of the `darkening-parameters`
* property (file `ftdriver.h`), which allows the control at run-time.
*
* Do **not** undefine these macros!
*/
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 500
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 400
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 1000
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 275
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 1667
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 275
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 2333
#define CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 0
/**************************************************************************
*
* `CFF_CONFIG_OPTION_OLD_ENGINE` controls whether the pre-Adobe CFF engine
* gets compiled into FreeType. If defined, it is possible to switch
* between the two engines using the `hinting-engine` property of the 'cff'
* driver module.
*/
/* #define CFF_CONFIG_OPTION_OLD_ENGINE */
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** P C F D R I V E R C O N F I G U R A T I O N ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* There are many PCF fonts just called 'Fixed' which look completely
* different, and which have nothing to do with each other. When selecting
* 'Fixed' in KDE or Gnome one gets results that appear rather random, the
* style changes often if one changes the size and one cannot select some
* fonts at all. This option makes the 'pcf' module prepend the foundry
* name (plus a space) to the family name.
*
* We also check whether we have 'wide' characters; all put together, we
* get family names like 'Sony Fixed' or 'Misc Fixed Wide'.
*
* If this option is activated, it can be controlled with the
* `no-long-family-names` property of the 'pcf' driver module.
*/
#define PCF_CONFIG_OPTION_LONG_FAMILY_NAMES
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** A U T O F I T M O D U L E C O N F I G U R A T I O N ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* Compile 'autofit' module with CJK (Chinese, Japanese, Korean) script
* support.
*/
#define AF_CONFIG_OPTION_CJK
/**************************************************************************
*
* Compile 'autofit' module with fallback Indic script support, covering
* some scripts that the 'latin' submodule of the 'autofit' module doesn't
* (yet) handle.
*/
#define AF_CONFIG_OPTION_INDIC
/**************************************************************************
*
* Compile 'autofit' module with warp hinting. The idea of the warping
* code is to slightly scale and shift a glyph within a single dimension so
* that as much of its segments are aligned (more or less) on the grid. To
* find out the optimal scaling and shifting value, various parameter
* combinations are tried and scored.
*
* You can switch warping on and off with the `warping` property of the
* auto-hinter (see file `ftdriver.h` for more information; by default it
* is switched off).
*
* This experimental option is not active if the rendering mode is
* `FT_RENDER_MODE_LIGHT`.
*/
/* #define AF_CONFIG_OPTION_USE_WARPER */
/**************************************************************************
*
* Use TrueType-like size metrics for 'light' auto-hinting.
*
* It is strongly recommended to avoid this option, which exists only to
* help some legacy applications retain its appearance and behaviour with
* respect to auto-hinted TrueType fonts.
*
* The very reason this option exists at all are GNU/Linux distributions
* like Fedora that did not un-patch the following change (which was
* present in FreeType between versions 2.4.6 and 2.7.1, inclusive).
*
* ```
* 2011-07-16 Steven Chu <steven.f.chu@gmail.com>
*
* [truetype] Fix metrics on size request for scalable fonts.
* ```
*
* This problematic commit is now reverted (more or less).
*/
/* #define AF_CONFIG_OPTION_TT_SIZE_METRICS */
/* */
/*
* This macro is obsolete. Support has been removed in FreeType version
* 2.5.
*/
/* #define FT_CONFIG_OPTION_OLD_INTERNALS */
/*
* The next three macros are defined if native TrueType hinting is
* requested by the definitions above. Don't change this.
*/
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
#define TT_USE_BYTECODE_INTERPRETER
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
#if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 1
#define TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
#endif
#if TT_CONFIG_OPTION_SUBPIXEL_HINTING & 2
#define TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
#endif
#endif
#endif
/*
* Check CFF darkening parameters. The checks are the same as in function
* `cff_property_set` in file `cffdrivr.c`.
*/
#if CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 < 0 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 < 0 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 < 0 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 < 0 || \
\
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 < 0 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 < 0 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 < 0 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 < 0 || \
\
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1 > \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2 > \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3 > \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4 || \
\
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1 > 500 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2 > 500 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3 > 500 || \
CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4 > 500
#error "Invalid CFF darkening parameters!"
#endif
FT_END_HEADER
#endif /* FTOPTION_H_ */
/* END */

36
third_party/freetype2/roll-freetype.sh vendored Normal file
View File

@ -0,0 +1,36 @@
#!/bin/bash
rolldeps() {
STEP="roll-deps" &&
roll-dep "$@" third_party/externals/freetype/
}
previousrev() {
STEP="original revision" &&
PREVIOUS_FREETYPE_REV=$(git grep "'freetype_revision':" HEAD~1 -- DEPS | grep -Eho "[0-9a-fA-F]{32}")
}
mergeinclude() {
PATH=$1
INCLUDE=$2 &&
previousrev &&
STEP="merge ${PATH}/${INCLUDE}: check for merge conflicts" &&
TMPFILE=$(mktemp) &&
git -C third_party/externals/freetype2/src/ cat-file blob ${PREVIOUS_FREETYPE_REV}:include/freetype/config/${INCLUDE} >> ${TMPFILE} &&
git merge-file third_party/freetype2/include/${PATH}/${INCLUDE} ${TMPFILE} third_party/externals/freetype2/src/include/freetype/config/${INCLUDE} &&
rm ${TMPFILE} &&
git add third_party/freetype2/include/${PATH}/${INCLUDE}
}
commit() {
STEP="commit" &&
git commit --quiet --amend --no-edit
}
rolldeps "$@" &&
mergeinclude freetype-android ftoption.h &&
mergeinclude freetype-android ftconfig.h &&
mergeinclude freetype-no-type1 ftoption.h &&
mergeinclude freetype-no-type1 ftconfig.h &&
commit ||
{ echo "Failed step ${STEP}"; exit 1; }