xref: /external/freetype/ChangeLog.27

2016-12-30  Werner Lemberg  <wl (a] gnu.org>

	* Version 2.7.1 released.
	=========================


	Tag sources with `VER-2-7-1'.

	* docs/VERSION.TXT: Add entry for version 2.7.1.

	* README, Jamfile (RefDoc), builds/windows/vc2005/freetype.vcproj,
	builds/windows/vc2005/index.html,
	builds/windows/vc2008/freetype.vcproj,
	builds/windows/vc2008/index.html,
	builds/windows/vc2010/freetype.vcxproj,
	builds/windows/vc2010/index.html,
	builds/windows/visualc/freetype.dsp,
	builds/windows/visualc/freetype.vcproj,
	builds/windows/visualc/index.html,
	builds/windows/visualce/freetype.dsp,
	builds/windows/visualce/freetype.vcproj,
	builds/windows/visualce/index.html,
	builds/wince/vc2005-ce/freetype.vcproj,
	builds/wince/vc2005-ce/index.html,
	builds/wince/vc2008-ce/freetype.vcproj,
	builds/wince/vc2008-ce/index.html: s/2.7/2.7.1/, s/27/271/.

	* include/freetype/freetype.h (FREETYPE_PATCH): Set to 1.

	* builds/unix/configure.raw (version_info): Set to 19:0:13.
	* CMakeLists.txt (VERSION_PATCH): Set to 1.

2016-12-30  Werner Lemberg  <wl (a] gnu.org>

	[ftfuzzer] Replace `rand' with an xorshift algorithm.

	* src/tools/ftfuzzer/ftfuzzer.cc: Don't include `stdlib.h'.
	(Random): Implement and use a 32bit `xorshift' algorithm.

2016-12-30  Werner Lemberg  <wl (a] gnu.org>

	[ftfuzzer] Restrict number of tested bitmap strikes.

	Malformed fonts often have large values for the number of bitmap
	strikes, and FreeType doesn't check the validity of all bitmap
	strikes in advance.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=353

	* src/tools/ftfuzzer/ftfuzzer.cc: Include `stdlib.h' for `rand'.
	(Random): Small class to provide n randomly selected numbers
	(without repetition) out of the value set [1,N].
	(LLVMFuzzerTestOneInput): Use it to test only up to 10 bitmap
	strikes.

2016-12-29  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Variation font API stability issues.

	Make some functions work before a call to `TT_Set_MM_Blend'.

	* src/truetype/ttgxvar.c (tt_hadvance_adjust): Exit immediately if
	we don't blend.
	(TT_Get_MM_Blend, TT_Get_Var_Design): Return default values if we
	don't blend.

2016-12-29  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttgxvar.c (TT_Get_MM_Var): Check axis data.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=348

2016-12-29  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Tracing fixes.

	* src/truetype/ttgxvar.c (tt_hadvance_adjust): Emit correct
	information.
	(TT_Set_Var_Design): Fix typo.
	(TT_Get_Var_Design): Fix typos.

2016-12-29  Werner Lemberg  <wl (a] gnu.org>

	*/*: Use `0.5f' for tracing 16.16 numbers.

2016-12-29  Werner Lemberg  <wl (a] gnu.org>

	[pcf] Protect against gzip bombs.

	Fix suggested by Kostya; reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=345

	* src/pcf/pcfread.c (pcf_read_TOC): Limit number of TOC entries to
	1024.

2016-12-28  Werner Lemberg  <wl (a] gnu.org>

	[psnames] Only declare, not define, data in `pstables.h' (#49949).

	Pdfium includes `pstables.h' a second time; moving the definition
	from `pstables.h' to `psmodule.c' saves more than 60kByte data
	segment space for this case.

	* src/tools/glnames.py (StringTable::dump,
	StringTable::dump_sublist, dump_encoding, dump_array): Emit
	additional code to only define tables if `DEFINE_PS_TABLES' is set.

	* src/psnames/pstables.h: Regenerated.
	* src/psnames/psmodule.c (DEFINE_PS_TABLES): Define.

2016-12-28  Werner Lemberg  <wl (a] gnu.org>

	[cff] Catch `blend' op in non-variant fonts.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=334

	* src/cff/cf2intrp.c (cf2_interpT2CharString) <cf2_cmdBLEND>: Don't
	allow `blend' op for non-variant fonts.

2016-12-28  Werner Lemberg  <wl (a] gnu.org>

	[cff] Better check of number of blends.

	* src/cff/cf2intrp.c (cf2_interpT2CharString) <cf2_cmdBLEND>,
	src/cff/cffparse.c (cff_parse_blend): Compare number of blends with
	stack size.

2016-12-27  Werner Lemberg  <wl (a] gnu.org>

	Documentation updates.

	* docs/CHANGES: Add missing information.

	* docs/formats.txt: Rewritten and updated.

2016-12-27  Werner Lemberg  <wl (a] gnu.org>

	[truetype, type1] Implement `FT_Get_Var_Design_Coordinates'.

	* src/truetype/ttgxvar.c (TT_Get_Var_Design): Implement.
	(TT_Set_Var_Design): Fix tracing.

	* src/type1/t1load.c (T1_Get_Var_Design): Implement.

2016-12-24  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttpload.c (tt_face_load_hdmx): Ignore `version'.

	Problem reported by  <418092625 (a] qq.com>.

2016-12-24  Werner Lemberg  <wl (a] gnu.org>

	* src/sfnt/ttsbit.c (tt_face_load_sbit): Allow more version values.

	Some fonts seem to have the `version' field in the wrong byte order.

	Problem reported by  <418092625 (a] qq.com>.

2016-12-24  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttpload.c (tt_face_load_loca): Sanitize table length.

	This trivial fix allows us to accept more fonts.

	Problem reported by  <418092625 (a] qq.com>.

2016-12-24  Werner Lemberg  <wl (a] gnu.org>

	* src/sfnt/sfobjs.c (sfnt_init_face): Fix tracing.

2016-12-22  Werner Lemberg  <wl (a] gnu.org>

	* CMakeLists.txt: Make it work with cmake 2.8.11.2 (#49909).

2016-12-22  Werner Lemberg  <wl (a] gnu.org>

	Ensure used preprocessor symbols are defined (#49790).

	* builds/unix/ftconfig.in, builds/vms/ftconfig.h,
	include/freetype/config/ftconfig.h: Check `__GNUC__', `__IBMC__',
	and `__SUNPRO_C' correctly.

2016-12-22  Werner Lemberg  <wl (a] gnu.org>

	* src/base/ftrfork.c (FT_Raccess_Get_DataOffsets): Check `count'.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=308

2016-12-22  Werner Lemberg  <wl (a] gnu.org>

	[cff] Protect against invalid `vsindex' and `blend' values.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=305

	* src/cff/cf2intrp.c (cf2_interpT2CharString) <cf2_cmdVSINDEX,
	cf2_cmdBLEND>: Implement it.

2016-12-22  Werner Lemberg  <wl (a] gnu.org>

	[ftfuzzer] Always use Adobe CFF engine.

	* src/tools/ftfuzzer/ftfuzzer.cc (FT_Global::FT_Global): Implement
	it.

2016-12-21  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Thinko.

	I should really stop coding late in the evening...

	Thanks again to Ben for checking.

2016-12-21  Werner Lemberg  <wl (a] gnu.org>

	[autofit] Support variation fonts.

	(This ChangeLog entry was added later on.)

	* src/autofit/afglobal.c (af_face_globals_free): Remove useless
	code.

	* src/base/ftmm.c (FT_Set_MM_Design_Coordinates,
	* FT_Set_Var_Design_Coordinates, FT_Set_MM_Blend_Coordinates,
	FT_Set_Var_Blend_Coordinates): Finalize
	auto-hinter data to enforce recomputation.  Note that this is a
	brute-force method which should be improved.

2016-12-21  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Thinko.

	Don't apply deltas twice for non-phantom points.

	Spotted by Ben Wagner.

2016-12-21  Werner Lemberg  <wl (a] gnu.org>

	[cff, truetype] Another try for #49829.

	* src/cff/cffdrivr.c: Don't include
	`FT_SERVICE_METRICS_VARIATIONS_H'.
	(cff_get_advances): Use `ttface->variation_support'.

	* src/truetype/ttdriver.c (tt_get_advances): Use
	`ttface->variation_support'.

	* src/truetype/ttgload.c (TT_Process_Simple_Glyph,
	load_truetype_glyph): Use `ttface->variation_support'.

2016-12-21  Werner Lemberg  <wl (a] gnu.org>

	[truetype, sfnt] Introduce font variation flags to `TT_Face'.

	* include/freetype/internal/tttypes.h (TT_FACE_FLAG_VAR_XXX):
	New macros describing available functionality of various OpenType
	tables related to font variation.
	(TT_Face): New fields `variation_support' and `mvar_support',
	replacing and extending `use_fvar'.

	* src/sfnt/sfobjs.c (sfnt_init_face, sfnt_load_face): Use
	`variation_support'.

	* src/truetype/ttgxvar.c (ft_var_load_hvar): Set `variation_support'
	field.
	(TT_Vary_Apply_Glyph_Deltas): Updated.

2016-12-21  Werner Lemberg  <wl (a] gnu.org>

	[base] Improve sanity check for Mac resources (#49888).

	* src/base/ftobjs.c (Mac_Read_sfnt_Resource): Abort if `rlen' is not
	positive.

2016-12-20  Werner Lemberg  <wl (a] gnu.org>

	[base] More sanity checks for Mac resources.

	We use

	  https://github.com/kreativekorp/ksfl/wiki/Macintosh-Resource-File-Format

	and

	  https://developer.apple.com/legacy/library/documentation/mac/pdf/MoreMacintoshToolbox.pdf#page=151

	as references.

	* include/freetype/internal/ftrfork.h (FT_RFork_Ref): Use FT_Short
	for `res_id'.

	* src/base/ftrfork.c (FT_Raccess_Get_HeaderInfo): Extract map length
	and use it to improve sanity checks.
	Follow the specification more closely;in particular, all data types
	are signed, not unsigned.
	(FT_Raccess_Get_DataOffsets): Follow the specification more closely;
	in particular, all data types are signed, not unsigned.
	Add some sanity checks.

2016-12-20  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Improve logic for getting fast advance widths.

	* src/cff/cffdrivr.c (cff_get_advances), src/truetype/ttdriver.c
	(tt_get_advances): Use `is_default_instance' for test; this gets
	recomputed after changing blend coordinates.

2016-12-20  Ben Wagner  <bungeman (a] google.com>
	    Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix linear metrics of GX variation fonts (#49829).

	When asking for an unhinted non-default variations,
	`linearVertAdvance' is currently the value from the `hmtx' table
	instead of the actual value after applying the variation.  `HVAR'
	support fixes this, but fonts will exist without that table and will
	need sane fallback.

	Problem also reported as

	  https://bugs.chromium.org/p/skia/issues/detail?id=5917

	* src/truetype/ttgload.c (TT_Process_Simple_Glyph,
	load_truetype_glyph): Implement linear advance adjustments if `HVAR'
	or `VVAR' tables are missing.

2016-12-20  Werner Lemberg  <wl (a] gnu.org>

	[cff, truetype] Fast advance width retrieval for fonts with HVAR.

	Everything is guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT.

	* src/base/ftadvanc.c (LOAD_ADVANCE_FAST_CHECK): Don't handle MM.

	* src/cff/cffdrivr.c: Include FT_SERVICE_METRICS_VARIATIONS_H.
	(cff_get_advances): Test for HVAR and VVAR.

	* src/truetype/ttdriver.c (tt_get_advances): Test for HVAR and VVAR.

2016-12-18  Werner Lemberg  <wl (a] gnu.org>

	[base] Fix invalid mac font recursion.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=304

	* src/base/ftobjs.c (FT_Open_Face): Code moved to...
	(ft_open_face_internal): ... this function.
	Add a parameter to control whether we try special Mac font handling
	in case of failure.
	(FT_Open_Face, FT_New_Face, FT_New_Memory_Face,
	open_face_from_buffer): Use `ft_open_face_internal'.

2016-12-18  Werner Lemberg  <wl (a] gnu.org>

	* src/cff/cffobjs.c (cff_face_init): Make named instances work.

2016-12-18  Werner Lemberg  <wl (a] gnu.org>

	[truetype, cff] Extend `get_var_blend' function of MM service.

	In particular, we need access to named instance data.

	* include/freetype/internal/services/svmm.h (FT_Get_Var_Blend_Func):
	Add argument for `FT_MM_Var'.

	* src/cff/cffload.c (cff_get_var_blend): Updated.
	* src/cff/cffload.h: Updated.

	* src/cff/cf2ft.c (cf2_getNormalizedVector): Updated.

	* src/truetype/ttgxvar.c (tt_get_var_blend): Updated.
	Accept value `NULL' for arguments.
	* src/truetype/ttgxvar.h: Updated.

2016-12-18  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Handle `fvar' with zero axes as a non-MM font.

	This is better behaviour than exiting with an error.

	* include/freetype/internal/tttypes.h (TT_Face): Add `use_fvar'
	field.

	* src/sfnt/sfobjs.c (sfnt_init_face): Compute `use_fvar', also
	updating the validation code.
	Use `use_fvar' to compute FT_FACE_FLAG_MULTIPLE_MASTERS.

	* src/truetype/ttgxvar.c (TT_Get_MM_Var): Remove `fvar' validation
	code.

2016-12-18  Werner Lemberg  <wl (a] gnu.org>

	Minor GX code shuffling.

	* include/freetype/internal/tttypes.h (TT_Face): Move
	`is_default_instance' into TT_CONFIG_OPTION_GX_VAR_SUPPORT
	block.

	* src/sfnt/sfobjs.c (sfnt_init_face): Updated.
	* src/truetype/ttgload.c (IS_DEFAULT_INSTANCE): New macro.
	(TT_Load_Glyph): Use it.

2016-12-18  Werner Lemberg  <wl (a] gnu.org>

	[cff] Better handling of non-CFF font formats.

	* src/cff/cffload.c (cff_font_load): Pure CFFs don't have a
	signature, so return `FT_Err_Unknown_File_Format' more often.

2016-12-17  Werner Lemberg  <wl (a] gnu.org>

	* src/cff/cffload.c (cff_build_blend_vector): Remove redundant code.

2016-12-17  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttobjs.c (tt_face_init): Simplify conditional code.

2016-12-17  Werner Lemberg  <wl (a] gnu.org>

	[sfnt, truetype] Various sanitizing fixes.

	* src/sfnt/sfobjs.c (sfnt_init_face): If the axis count in `fvar' is
	zero, set `num_instances' to zero.

	* src/truetype/ttgxvar.c (TT_Get_MM_Var): Handle `fvar' table with
	zero axes as invalid.

	* src/truetype/ttobjs.c (tt_face_init): Improve logic of loading
	`loca', `cvt', `fpgm', and `prep' table.

2016-12-17  Werner Lemberg  <wl (a] gnu.org>

	Improve tracing of `FT_Open_Face'.

	* src/base/ftobjs.c (FT_Open_Face): Return info on number of
	available faces and numbered instances, or the indices of the
	requested face and numbered instance.

	* src/sfnt/sfobjs. (sfnt_open_font): Trace number of subfonts.

2016-12-17  Werner Lemberg  <wl (a] gnu.org>

	* src/cff/cffload.c (cff_load_private_dict): Always init `blend'.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=295

2016-12-16  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix `cvar' sanity test.

	Reported by Dave Arnold.

	* src/truetype/ttgxvar.c (tt_face_vary_cvt): Use tuple count mask.

2016-12-16  Werner Lemberg  <wl (a] gnu.org>

	[cff, truetype] Remove compiler warnings; fix `make multi'.

	* src/cff/cf2font.h: Include `cffload.h'.

	* src/cff/cffload.c: Include FT_MULTIPLE_MASTERS_H and
	FT_SERVICE_MULTIPLE_MASTERS_H.
	(cff_vstore_load): Eliminate `vsSize'.
	(cff_load_private_dict): Tag as `FT_LOCAL_DEF'.

	* src/cff/cffload.h: Include `cffobjs.h'.
	Provide declaration for `cff_load_private_dict'.

	* src/truetype/ttgxvar.c (ft_var_load_hvar): Eliminate
	`minorVersion' and `map_offset'.

2016-12-16  Werner Lemberg  <wl (a] gnu.org>

	[cff] Fix heap buffer overflow (#49858).

	* src/cff/cffparse.c (cff_parser_run): Add one more stack size
	check.

2016-12-15  Werner Lemberg  <wl (a] gnu.org>

	Fix clang warnings.

	* src/cff/cffload.c (cff_blend_doBlend): Add cast.
	(cff_subfont_load): Set `error' correctly.

	* src/sfnt/ttmtx.c (tt_face_get_metrics): Typo.

2016-12-15  Dave Arnold  <darnold (a] adobe.com>
	    Werner Lemberg  <wl (a] gnu.org>

	[cff] Implement CFF2 support (2/2).

	The font variation code.  All parts dependent on the GX code in the
	`truetype' module are guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT.
	In other words, you can still compile the `cff' module without
	defining TT_CONFIG_OPTION_GX_VAR_SUPPORT (which brings you CFF2
	support without font variation).

	* src/cff/cf2font.c (cf2_font_setup): Add support for font
	variation.
	* src/cff/cf2font.h (CF2_Font): Add fields for variation data.

	* src/cff/cf2ft.c (cf2_free_instance): Free blend data.
	(cf2_getVStore, cf2_getNormalizedVector): New functions.
	* src/cff/cf2ft.h: Updated.

	* src/cff/cf2intrp.c: Include `cffload.h'.
	(cf2_cmdRESERVED_15, cf2_cmdRESERVED_16): Replace with...
	(cf2_cmdVSINDEX, cf2_cmdBLEND): ... this new enum values.
	(cf2_doBlend): New function.
	(cf2_interpT2CharString): Handle `vsindex' and `blend' opcodes.

	* src/cff/cffload.c (FT_fdot14ToFixed): New macro.
	(cff_vstore_done, cff_vstore_load): New functions.
	(cff_blend_clear, cff_blend_doBlend, cff_blend_build_vector,
	cff_blend_check_vector): New functions.
	(cff_load_private_dict): Add arguments for blend vector.
	Handle blend data.
	(cff_subfont_load, cff_subfont_done): Updated.
	(cff_font_load): Handle CFF2 variation store data.
	(cff_font_done): Updated.
	* src/cff/cffload.h: Include `cffparse.h'.
	Updated.

	* src/cff/cffobjs.c (cff_face_done): Updated.

	* src/cff/cffparse.c: Include `cffload.h'.
	(cff_parse_num): Handle internal value 255.
	(cff_parse_vsindex, cff_parse_blend): New functions.
	(CFF_FIELD_BLEND): New macro.
	(cff_parser_run): Updated.
	* src/cff/cffparse.h (cff_kind_blend): New enum value.

	* src/cff/cfftoken.h: Handle `vstore', `vsindex', and `blend'
	dictionary values.

	* src/cff/cfftypes.h (CFF_VarData, CFF_AxisCoords, CFF_VarRegion,
	CFF_VStore, CFF_Blend): New structures.
	(CFF_FontRecDict): Add `vstore_offset' field.
	(CFF_Private): Add `vsindex' field.
	(CFF_SubFont): Add fields for blend data.
	(CFF_Font): Add `vstore' field.

	* src/truetype/ttgxvar.c (TT_Get_MM_Var): `CFF2' is equal to `gvar',
	since glyph variation data is directly embedded.
	(TT_Set_MM_Blend): Don't load `gvar' table for CFF2 fonts.

2016-12-15  Dave Arnold  <darnold (a] adobe.com>
	    Werner Lemberg  <wl (a] gnu.org>

	[cff] Implement CFF2 support (1/2).

	This commit does not contain the blend code for font variation
	support, which follows in another commit.

	You should ignore whitespace while inspecting this commit.

	* include/freetype/internal/tttypes.h (TT_Face): Add `isCFF2'
	member.

	* src/cff/cf2font.h (CF2_Font): Add `isCFF2' member.

	* src/cff/cf2ft.c (cf2_decoder_parse_charstrings): Handle `isCFF2'
	flag.
	(cf2_getMaxstack): New function.
	* src/cff/cf2ft.h: Updated.

	* src/cff/cf2intrp.c (cf2_escRESERVED_38): New enum.
	(cf2_interpT2CharString): Handle CFF2 differences.
	Add tracing message for errors.

	* src/cff/cffdrivr.c (cff_get_glyph_name, cff_get_name_index):
	Update for CFF2.

	* src/cff/cffload.c (FT_FIXED_ONE): New macro.
	(cff_index_init, cff_index_load_offsets, cff_index_access_element,
	cff_index_get_name, cff_ft_select_get, cff_load_private_dict,
	cff_subfont_load, cff_font_load): Handle CFF2.
	* src/cff/cffload.h: Updated.

	* src/cff/cffobjs.c (cff_face_init): Handle CFF2.

	* src/cff/cffparse.c (cff_parse_maxstack): New function.
	(CFFCODE_TOPDICT, CFFCODE_PRIVATE): Removed
	* src/cff/cffparse.h (CFF2_MAX_STACK, CFF2_DEFAULT_STACK): New
	macros.
	(CFF2_CODE_TOPDICT, CFF2_CODE_FONTDICT, CFF2_CODE_PRIVATE): New
	macros.

	* src/cff/cfftoken.h: Add fields for CFF2 dictionaries (but no blend
	stuff).

	* src/cff/cfftypes.h (CFF_Index): Add `hdr_size' field.
	(CFF_FontRecDict): Add `maxstack' field.
	(CFF_Private): Add `subfont' field.
	(CFF_Font): Add `top_dict_length' and `cff2' fields.

	* src/sfnt/sfobjs.c (sfnt_load_face): Handle `CFF2' table.

2016-12-15  Werner Lemberg  <wl (a] gnu.org>
	    Dave Arnold  <darnold (a] adobe.com>

	[truetype] Provide HVAR advance width variation as a service.

	Everything is guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT.

	* src/truetype/ttdriver.c (tt_service_metrics_variations): Updated.

	* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Prevent
	double adjustment of advance width.

	* src/sfnt/ttmtx.c: Include FT_SERVICE_METRICS_VARIATIONS_H.
	(tt_face_get_metrics): Apply metrics variations.

2016-12-15  Dave Arnold  <darnold (a] adobe.com>
	    Werner Lemberg  <wl (a] gnu.org>

	[truetype] Provide function to apply `HVAR' advance width variation.

	Everything is guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT.

	* src/truetype/ttgxvar.c (tt_hadvance_adjust): New function.
	* src/truetype/ttgxvar.h: Updated.

2016-12-15  Dave Arnold  <darnold (a] adobe.com>
	    Werner Lemberg  <wl (a] gnu.org>

	[truetype] Add `HVAR' table parsing.

	Note that this is not complete yet; it only handles advance width
	variation.

	Activation of the code follows in another commit.

	Everything is guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT.

	* include/freetype/ftmm.h (FT_Var_Named_Style): Add `psid' member.

	* src/truetype/ttgxvar.h (GX_HVarData, GX_AxisCoords, GX_HVarRegion,
	GX_HVStore, GX_WidthMap): New auxiliary structures for...
	(GX_HVarTable): ... HVAR main structure.
	(GX_BlendRec): Add data for HVAR loading.

	* src/truetype/ttgxvar.c (FT_FIXED_ONE, FT_fdot14ToFixed,
	FT_intToFixed, FT_fixedToInt): New macros.
	(ft_var_load_hvar): New function.
	(TT_Get_MM_Var): Updated.
	(tt_done_blend): Deallocate HVAR data.

2016-12-15  Dave Arnold  <darnold (a] adobe.com>

	[cff] Extend number parsing.

	The forthcoming CFF2 support needs a dynamic parsing limit.

	* src/cff/cffparse.c (cff_parse_num, do_fixed, cff_parse_fixed,
	cff_parse_fixed_scaled, cff_parse_fixed_dynamic): Add argument for
	parser.
	(cff_parse_font_matrix, cff_parse_font_bbox, cff_parse_private_dict,
	cff_parse_multiple_master, cff_parse_cid_ros, cff_parser_run): Updated.

	* src/cff/cffparse.h (cff_parse_num): Export locally.

2016-12-15  Dave Arnold  <darnold (a] adobe.com>

	[cff] Implement dynamic stack size for Adobe engine.

	This also adds `cf2_stack_setReal' and `cf2_stack_pop', needed for
	the forthcoming CFF2 support.

	* src/cff/cf2stack.c (cf2_stack_init): Add argument for stack size.
	(cf2_stack_free): Deallocate stack.
	(cf2_stack_count, cf2_stack_pushInt, cf2_stack_pushFixed,
	cf2_stack_popInt, cf2_stack_popFixed, cf2_stack_getReal,
	cf2_stack_clear): Updated.
	(cf2_stack_setReal, cf2_stack_pop): New functions.

	* src/cff/cf2stack.h (CF2_Stack): Add `stackSize' member.
	Update function declarations.

	* src/cff/cf2intrp.c (cf2_interpT2CharString): Updated.

	* src/cff/cffparse.c (cff_parser_init): Add parameter for stack
	size; return error code.
	(cff_parser_done): New function.
	(cff_parser_run): Updated.

	* src/cff/cffparse.h (CFF_Parser): Add `stackSize' member and make
	`stack' a pointer.
	Update function declarations.

	* src/cff/cffload.c (cff_load_private_dict, cff_subfont_load):
	Updated.

2016-12-15  Dave Arnold  <darnold (a] adobe.com>
	    Werner Lemberg  <wl (a] gnu.org>

	[cff] Code shuffling.

	* src/cff/cfftypes.h (CFF_Font): Add `library' and `base_offset'
	fields.

	* src/cff/cffload.c (cff_subfont_load): Change last argument to
	`CFF_Font'
	Split off parsing of private dictionary into...
	(cff_load_private_dict): ...this new function.
	(cff_font_load): Updated.

2016-12-14  Werner Lemberg  <wl (a] gnu.org>

	[sfnt, truetype] Add framework for Metrics Variations service.

	No effect yet; service functions will be implemented later on.

	Everything is guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT.

	* include/freetype/internal/services/svmetric.h: New file.

	* include/freetype/internal/ftserv.h
	(FT_SERVICE_METRICS_VARIATIONS_H): New macro.

	* include/freetype/internal/tttypes.h (TT_Face): New field `var'.

	* src/sfnt/sfobjs.c: Include FT_SERVICE_METRICS_VARIATIONS_H.
	(sfnt_init_face): Initialize `face->var'.

	* src/truetype/ttdriver.c: Include FT_SERVICE_METRICS_VARIATIONS_H.
	(tt_service_metrics_variations): New service.
	(tt_services): Updated.

	* src/truetype/ttpic.h: Updated.

2016-12-14  Werner Lemberg  <wl (a] gnu.org>

	[cff] Add Multiple Masters service.

	The code simply uses the MM functions from the `truetype' module.

	Everything is guarded with TT_CONFIG_OPTION_GX_VAR_SUPPORT.

	* include/freetype/internal/tttypes.h (TT_Face): New field `mm'.

	* src/cff/cffdrivr.c: Include FT_SERVICE_MULTIPLE_MASTERS_H.
	(cff_set_mm_blend, cff_get_mm_blend, cff_get_mm_var,
	cff_set_var_design, cff_get_var_design): New functions.
	(cff_service_multi_masters): New service.
	(cff_services): Updated.

	* src/cff/cffload.c (cff_get_var_blend, cff_done_blend): New
	functions.
	* src/cff/cffload.h: Updated.

	* src/cff/cffpic.h (CFF_SERVICE_MULTI_MASTERS_GET): New macro.

	* src/sfnt/sfobjs.c: Include FT_SERVICE_MULTIPLE_MASTERS_H.
	(sfnt_init_face): Initialize `face->mm'.

2016-12-14  Werner Lemberg  <wl (a] gnu.org>

	Extend functionality of `ft_module_get_service'.

	It can now differentiate between local and global searches.

	* src/base/ftobjs.c (ft_module_get_service): Add `global' argument.
	(FT_Get_TrueType_Engine_Type): Updated.

	* src/cff/cffdrivr.c (cff_get_ps_name, cff_get_cmap_info): Updated.

	* include/freetype/internal/ftobjs.h: Updated.
	* include/freetype/internal/ftserv.h (FT_FACE_FIND_GLOBAL_SERVICE):
	Updated.

2016-12-14  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttgxvar.c (tt_get_var_blend): Fix compiler warning.

2016-12-14  Dave Arnold  <darnold (a] adobe.com>
	    Werner Lemberg  <wl (a] gnu.org>

	[sfnt, cff] Minor preparations.

	* include/freetype/tttags.h (TTAG_CFF2, TTAG_HVAR, TTAG_MVAR,
	TTAG_VVAR): New SFNT table tags.

	* src/cff/cf2fixed.h (CF2_FIXED_ONE, CF2_FIXED_EPSILON): Add cast.

2016-12-10  Werner Lemberg  <wl (a] gnu.org>

	[truetype, type1] Add `get_var_blend' to MM service.

	For internal use; we want to share code between the forthcoming CFF2
	support and TrueType.

	* include/freetype/internal/services/svmm.h (FT_Get_Var_Blend_Func):
	New typedef.
	(MultiMasters): Add `get_var_blend'.
	(FT_Service_MultiMasters): Updated.

	* src/truetype/ttgxvar.c (tt_get_var_blend): New function.
	* src/truetype/ttgxvar.h: Updated.

	* src/truetype/ttdriver.c (tt_service_gx_multi_masters): Updated.
	* src/type1/t1driver.c (t1_service_multi_masters): Updated.

2016-12-10  Werner Lemberg  <wl (a] gnu.org>

	[truetype, type1] Add `done_blend' to MM service.

	For internal use; we want to share code between the forthcoming CFF2
	support and TrueType.

	* include/freetype/internal/services/svmm.h (FT_Done_Blend_Func):
	New typedef.
	(MultiMasters): Add `done_blend'.
	(FT_Service_MultiMasters): Updated.

	* src/truetype/ttgxvar.c (tt_done_blend): Use `TT_Face' as argument.
	* src/truetype/ttgxvar.h: Updated.

	* src/truetype/ttobjs.c (TT_Face_Done): Updated.

	* src/truetype/ttdriver.c (tt_service_gx_multi_masters): Updated.
	* src/type1/t1driver.c (t1_service_multi_masters): Updated.

2016-12-09  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Revert change from 2016-12-08.

	I missed the functionality of `ft_module_get_service', which makes
	the change unnecessary.

2016-12-08  Werner Lemberg  <wl (a] gnu.org>

	Add framework to support services with 8 functions.

	We will need this for CFF variation font support.

	* include/freetype/internal/ftserv.h (FT_DEFINE_SERVICEDESCREC8):
	New macro.

2016-12-08  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Add `get_glyph_name' and `get_name_index' to SFNT interface.

	CFF2 fonts will need access to those two functions.

	* include/freetype/internal/sfnt.h: Include FT_SERVICE_GLYPH_DICT_H.
	(SFNT_Interface): Add `get_glyph_name' and `get_name_index' members.
	(FT_DEFINE_SFNT_INTERFACE): Updated.

	* src/sfnt/sfdriver.c (sfnt_get_glyph_name, sfnt_get_name_index):
	Fix signatures to exactly correspond to the glyph dict service
	function typedefs.
	(sfnt_interface): Updated.

2016-12-06  Dave Arnold  <darnold (a] adobe.com>

	Add `FT_Get_Var_Design_Coordinates' function.

	Note that the low-level functions aren't implemented yet.

	* include/freetype/ftmm.h: Declare.

	* include/freetype/internal/services/svmm.h
	(FT_Get_Var_Design_Func): New typedef.
	(MultiMasters): New MM service function `get_var_design'.
	(FT_DEFINE_SERVICE_MULTIMASTERSREC): Updated.
	Update all callers.

	* src/base/ftmm.c (FT_Get_Var_Design_Coordinates): Implement.

	* src/truetype/ttdriver.c: Updated.

	* src/truetype/ttgxvar.c (TT_Get_Var_Design): New dummy function to
	handle `get_var_design' service.
	* src/truetype/ttgxvar.h: Updated.

	* src/type1/t1driver.c: Updated.

	* src/type1/t1load.c (T1_Get_Var_Design): New dump function to
	handle `get_var_design' service.
	* src/type1/t1load.h: Updated.

2016-12-06  Werner Lemberg  <wl (a] gnu.org>

	* src/type1/t1load.c (parse_subrs): Fix memory leak.

	The `subrs' keyword might erroneously occur multiple times.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=231

2016-12-01  Werner Lemberg  <wl (a] gnu.org>

	[gzip] Improve building with external zlib (#49673).

	Building FreeType with external zlib 1.2.8 makes msvc 14 stop with
	the following error.

	  ftgzip.c
	  zlib-1.2.8\zlib.h(86): error C2061:
	                         syntax error: identifier 'z_const'
	  zlib-1.2.8\zlib.h(94): error C2054:
	                         expected '(' to follow 'z_const'
	  zlib-1.2.8\zlib.h(94): error C2085:
	                         'msg': not in formal parameter list
	  ...
	  zlib-1.2.8\zlib.h(877): fatal error C1003:
	                          error count exceeds 100; stopping compilation

	The error happens because FreeType keeps an own copy of zlib-1.1.4
	under `src/gzip'.  When building `src/gzip/ftgzip.c' with
	FT_CONFIG_OPTION_SYSTEM_ZLIB defined, it uses

	  #include <zlib.h>

	which correctly finds an external `zlib.h', but `zlib.h' itself has
	a line

	  #include "zconf.h"

	which makes Visual Studio 2015 find `src/gzip/zconf.h' while
	compiling the files in `src/gzip'.

	* src/gzip/zconf.h: Rename to...
	* src/gzip/ftzconf.h: ... this.
	* src/gzip/zlib.h, src/gzip/rules.mk (GZIP_DRV_SRCS): Updated.

2016-12-01  Oleksandr Chekhovskyi  <oleksandr.chekhovskyi (a] gmail.com>

	[autofit] Fix Emscripten crash (patch #9180).

	Function calls through pointers must use a matching signature to
	work on Emscripten, since such calls are dispatched through lookup
	tables grouped by signature.

	* src/autofit/aftypes.h (AF_WritingSystem_ApplyHintsFunc): Fix
	typedef.

2016-11-29  Werner Lemberg  <wl (a] gnu.org>

	[smooth] Revert previous commit.  Already fixed with 6ca54c64.

2016-11-29  Werner Lemberg  <wl (a] gnu.org>

	[smooth] Avoid conditional jump on uninitialized value (#49711).

	* src/smooth/ftgrays.c (gray_raster_render): Initialize `worker'.

2016-11-27  Nikolaus Waxweiler  <madigens (a] gmail.com>

	[autofit] Code shuffling.

	Also improve some comments and remove unused code.

	No functional change.

	* src/autofit/afloader.c (af_loader_load_g): Merged with...
	(af_loader_load_glyph): ...this function.
	Split off emboldening code into...
	(af_loader_embolden_glyph_in_slot): ... this function.

2016-11-17  Werner Lemberg  <wl (a] gnu.org>

	Better support of LLP64 systems with gcc (and clang).

	* builds/unix/configure.raw: Call `AC_TYPE_LONG_LONG_INT'.

	* builds/unix/ftconfig.in (FT_LONG64): Enable for LLP64 systems (and
	suppress warnings) even without `FT_CONFIG_OPTION_FORCE_INT64'.

2016-11-10  Werner Lemberg  <wl (a] gnu.org>

	Fix `lcd_weights' array size.

	* include/freetype/internal/ftobjs.h (FT_LibraryRec): Do it.

	Reported by Nikolaus.

2016-11-06  Werner Lemberg  <wl (a] gnu.org>

	* src/base/ftobjs.c (FT_Render_Glyph_Internal): Fix tracing.

2016-11-06  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Improve FT_LOAD_BITMAP_METRICS_ONLY for `sbix' format.

	It's unavoidable to call the PNG engine, but to get the metrics it
	is sufficient to read the PNG image's header only.

	* src/sfnt/pngshim.c (Load_SBit_Png): Add argument to control the
	allocation of the glyph slot.
	* src/sfnt/pngshim.h: Updated.
	* src/sfnt/ttsbit.c (tt_sbit_decoder_load_png,
	tt_face_load_sbix_image, tt_face_load_sbit_image): Updated.

2016-11-06  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Speed up `sbix' lookup.

	This also fixes a bug introduced in 2016-10-01 which prevents
	display of embedded bitmap fonts that use the `sbix' format.

	* src/sfnt/ttsbit.c (tt_face_load_sbit): Store `sbix' size and
	offset also in `ebdt_size' and `ebdt_start', respectively.  This
	makes the test for an embedded bitmap data table succeed for this
	format.

	(tt_face_load_strike_metrics) <TT_SBIT_TABLE_TYPE_SBIX>: Use
	`ebdt_size' and `ebdt_start'
	(tt_face_load_sbix_image): Ditto.

2016-11-06  Seigo Nonaka  <nona (a] google.com>
	    Werner Lemberg  <wl (a] gnu.org>

	Introduce a way of quickly retrieving (embedded) bitmap metrics.

	`FT_Load_Glyph' doesn't generate a bitmap for a non-bitmap glyph
	until the user calls `FT_Render_Glyph'.  However, it always
	allocates memory for bitmaps and copies or decodes the contents of a
	bitmap glyph, which can be quite slow for PNG data.

	* include/freetype/freetype.h (FT_LOAD_BITMAP_METRICS_ONLY): New
	macro.

	* src/base/ftobjs.c (FT_Load_Glyph): Unset FT_LOAD_RENDER if
	FT_LOAD_BITMAP_METRICS_ONLY is used.

	* src/sfnt/ttsbit.c (tt_sbit_decoder_alloc_bitmap,
	tt_sbit_decoder_load_bitmap): Add argument to control allocation of
	the glyph slot.
	(tt_sbit_decoder_load_image, tt_sbit_decoder_load_compound,
	tt_face_load_sbit_image): Updated.

	* src/pcf/pcfdrivr.c (PCF_Glyph_Load): Quickly exit if
	`FT_LOAD_BITMAP_METRICS_ONLY' is set.

	* src/pfr/pfrsbit.c, src/pfr/pfrsbit.h (pfr_slot_load_bitmap): Add
	argument to control allocation of the glyph slot.
	* src/pfr/pfrobjs (pfr_slot_load): Updated.

	* src/winfonts/winfnt.c (FNT_Load_Glyph): Ditto.

	* docs/CHANGES: Updated.

2016-11-06  Werner Lemberg  <wl (a] gnu.org>

	Synchronize with gnulib (#49448).

	* include/freetype/config/ftconfig.h, builds/unix/ftconfig.in,
	builds/vms/ftconfig.h (FT_TYPEOF): Update code to use definition in
	current version of `intprops.h'.
	Other minor synchronization to reduce code differences between the
	three files.

2016-11-03  Behdad Esfahbod  <behdad (a] behdad.org>

	[truetype] Clamp variation requests to valid range.

	This is required by OpenType 1.8; it also avoids rounding surprises.

	* src/truetype/ttgxvar.c (TT_Set_Var_Design): Clamp design coordinates
	outside of the allowed range to always stay within the range instead
	of producing an error.

2016-10-29  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Remove clang warnings.

	* src/truetype/ttinterp.h (TT_ExecContextRec): Using `FT_ULong' for
	loop counter handling.

	* src/truetype/ttinterp.c: Updated.
	(Ins_SCANTYPE): Use signed constant.
	(TT_RunIns): Ensure `num_twilight_points' is 16bit.

2016-10-27  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix commit from 2014-11-24.

	Problem reported by Hin-Tak Leung  <htl10 (a] users.sourceforge.net>.

	* src/truetype/ttpload.c (tt_face_load_hdmx): Fix file checking
	logic.

2016-10-26  Werner Lemberg  <wl (a] gnu.org>

	Add `FT_Get_{MM,Var}_Blend_Coordinates' functions.

	* include/freetype/ftmm.h: Declare.

	* include/freetype/internal/services/svmm.h (FT_Get_MM_Blend_Func):
	New typedef.
	(MultiMasters): New MM service function `get_mm_blend'.
	(FT_DEFINE_SERVICE_MULTIMASTERSREC): Updated.
	Update all callers.

	* src/base/ftmm.c (FT_Get_MM_Blend_Coordinates,
	FT_Get_Var_Blend_Coordinates): Implement.

	* src/truetype/ttdriver.c: Updated.

	* src/truetype/ttgxvar.c (TT_Get_MM_Blend): New function to handle
	`get_mm_blend' service.
	* src/truetype/ttgxvar.h: Updated.

	* src/type1/t1driver.c: Updated.

	* src/type1/t1load.c (T1_Get_MM_Blend): New function to handle
	`get_mm_blend' service.
	* src/type1/t1load.h: Updated.

	* docs/CHANGES: Document.

2016-10-26  Werner Lemberg  <wl (a] gnu.org>

	* src/type1/t1load.c (parse_subrs): Fix limit check.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=81

2016-10-25  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[cff] Correct cmap format reporting (#24819).

	* src/cff/cffdrivr.c (cff_get_cmap_info): Throw an error on synthetic
	charmap instead of guessing its format and language.

2016-10-22  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix SCANTYPE instruction (#49394).

	* src/truetype/ttinterp.c (Ins_SCANTYPE): Only use lower 16bits.

2016-10-22  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Improve handling of invalid post 2.5 tables [#49393].

	* src/sfnt/ttpost.c (load_format_25): We need at least a single
	table entry.

2016-10-14  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix handling of `cvar' table data.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53

	* src/truetype/ttgxvar.c (tt_face_vary_cvt): Ignore invalid CVT
	indices.

2016-10-11  Werner Lemberg  <wl (a] gnu.org>

	[psaux] Fix handling of invalid flex subrs.

	Problem reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=52

	* src/psaux/t1decode.c (t1_decoder_parse_charstrings)
	<op_callothersubr>: Set `flex_state' after error checking.

2016-10-11  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttgxvar.c (tt_done_blend): Fix deallocation.

2016-10-08  Werner Lemberg  <wl (a] gnu.org>

	* src/cid/cidload.c (cid_face_open): Properly propagate `error'.

2016-10-08  Werner Lemberg  <wl (a] gnu.org>

	[cid] Fix parsing of subr offsets.

	Bug introduced 2016-05-16.

	* src/cid/cidparse.c (cid_parser_new): Fix off-by-one error.

2016-10-01  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Disable bitmap strikes if we don't have a bitmap data table.

	* src/sfnt/ttsbit.c (tt_face_load_sbit): Check whether we have
	a bitmap data table.

2016-10-01  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Remove impossibility.

	* src/smooth/ftgrays.c (TWorker): Rearrange fields.
	(gray_convert_glyph): Remove impossible condition and clean up.

2016-09-29  Werner Lemberg  <wl (a] gnu.org>

	[pcf] Enrich family name with foundry name and glyph width info.

	This is a very old patch from openSuSE (from 2006, submitted to
	FreeType in 2011) that I forgot to apply.

	  https://build.opensuse.org/package/view_file/openSUSE:Factory/freetype2/freetype2-bitmap-foundry.patch

	Prepend the foundry name plus a space to the family name.  There are
	many 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.

	We also check whether we have `wide' characters; all put together,
	we get family names like `Sony Fixed' or `Misc Fixed Wide'.

	* src/pcf/pcfread.c (pcf_load_font): Implement it.

	* docs/CHANGES: Document it.

2016-09-29  Werner Lemberg  <wl (a] gnu.org>

	[ftfuzzer] Speed up.

	* src/tools/ftfuzzer/ftfuzzer.cc (LLVMFuzzerTestOneInput): Don't
	check for embedded bitmaps if we have a non-default instance.

2016-09-29  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Disallow bitmap strikes for non-default instances.

	Also speed up access of default instances if GX variations are
	active.

	* include/freetype/internal/tttypes.h (TT_FaceRec): Add
	`is_default_instance' member.

	* src/sfnt/sfobjs.c (sfnt_init_face): Initialize
	`is_default_instance'.

	* src/truetype/ttgload.c (TT_Process_Simple_Glyph,
	load_truetype_glyph): Add test for default instance.
	(TT_Load_Glyph): Load embedded bitmaps for default instance only.

	* src/truetype/ttgxvar.c (TT_Set_MM_Blend): Compute
	`is_default_instance'.

2016-09-29  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Clean up `TT_Face' structure.

	* include/freetype/internal/tttypes.h (TT_FaceRec): Remove unused
	fields `horz_metrics' and `vert_metrics'.
	Update documentation.

	* src/sfnt/sfobjs.c (sfnt_done_face): Updated.

2016-09-28  Werner Lemberg  <wl (a] gnu.org>

	More FT_ZERO usage.

	* src/gxvalid/gxvcommn.c (gxv_ClassTable_validate):
	s/ft_memset/FT_MEM_ZERO/.

	* src/psaux/t1decode.c (t1_decoder_parse_charstrings):
	s/ft_memset/FT_ARRAY_ZERO/.

	* src/raster/ftraster.c (FT_ZERO): Define.
	(ft_black_new): Use it.
	* src/raster/ftrend1.c (ft_raster1_get_cbox):
	s/FT_MEM_ZERO/FT_ZERO/.

	* src/smooth/ftgrays.c (FT_ZERO): Define.
	(gray_raster_new): Use it.
	* src/smooth/ftsmooth.c (ft_smooth_get_cbox):
	s/FT_MEM_ZERO/FT_ZERO/.

2016-09-28  Werner Lemberg  <wl (a] gnu.org>

	*/*: s/FT_MEM_ZERO/FT_ZERO/ where appropriate.

2016-09-27  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Trace number of executed opcodes.

	* src/truetype/ttinterp.c (TT_RunIns): Implement it.

2016-09-27  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Speed up `TT_Load_Glyph'.

	This avoids additional calls to `tt_face_lookup_table' for the
	`glyf' table, which can be expensive.

	* include/freetype/internal/tttypes.h (TT_LoaderRec): Move
	`glyf_offset' field to ...
	(TT_FaceRec): ... this structure.
	* src/truetype/ttgload.c (load_truetype_glyph): Updated.
	(tt_loader_init): Move initialization of `glyf_offset' to ...
	* src/truetype/ttpload.c (tt_face_load_loca): ... this function.

2016-09-27  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Introduce dynamic limits for some bytecode opcodes.

	This speeds up FreeType's handling of malformed fonts.

	* src/truetype/ttinterp.c (TT_RunIns): Set up limits for the number
	of twilight points, the total number of negative jumps, and the
	total number of loops in LOOPCALL opcodes.  The values are based on
	the number of points and entries in the CVT table.
	(Ins_JMPR): Test negative jump counter.
	(Ins_LOOPCALL): Test loopcall counter.

	* src/truetype/ttinterp.h (TT_ExecContext): Updated.

	* docs/CHANGES: Updated.

2016-09-25  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Sanitize only last entry of `loca' table.

	Without this patch, a loca sequence like `0 100000 0 100000 ...',
	where value 100000 is larger than the `glyf' table size, makes
	FreeType handle the whole `glyf' table as a single glyph again and
	again, which is certainly invalid (and can be very slow, too).

	* src/truetype/ttpload.c (tt_face_get_location): Implement.
	Improve tracing messages.

2016-09-25  Werner Lemberg  <wl (a] gnu.org>

	* src/tools/ftfuzzer/ftfuzzer.cc (LLVMFuzzerTestOneInput): Fix typo.

2016-09-24  Werner Lemberg  <wl (a] gnu.org>

	[autofit] Tracing fixes.

	* src/autofit/afmodule.c (af_autofitter_load_glyph): Call dumping
	functions only if we actually do tracing.

2016-09-22  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Reduce divisions in the line renderer.

	We don't need some divisions if a line segments stays within a single
	row or a single column of pixels.

	* src/smooth/ftgrays.c (gray_render_line) [FT_LONG64]: Make divisions
	conditional.

2016-09-15  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/smooth/ftgrays.c (gray_sweep): Remove check for empty table.

2016-09-14  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Another tiny speed-up.

	* src/smooth/ftgrays.c (gray_find_cell): Merge into...
	(gray_record_cell): ... this function.

2016-09-11  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/smooth/ftgrays.c (gray_{find,set}_cell): Remove dubious code.

2016-09-11  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Fix valgrind warning and reoptimize.

	The algorithm calls `gray_set_cell' at the start of each new contour
	or when the contours cross the cell boundaries. Double-checking for
	that is wasteful.

	* src/smooth/ftgrays.c (gray_set_cell): Remove check for a new cell.
	(gray_convert_glyph): Remove initialization introduced by 44b172e88.

2016-09-10  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Fix previous commit.

	Problems reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40

	We now map the strike index right before accessing the physical
	data, not earlier.

	* src/sfnt/sfobjs.c (sfnt_load_face): Set `face->sbit_strike_map'
	after creating the map so that...

	* src/sfnt/ttsbit.c (tt_face_load_strike_metrics): ... this function
	can be used before and after setting up `sbit_strike_map'.
	(tt_face_set_sbit_strike): Revert change.
	(tt_sbit_decoder_init, tt_face_load_sbix_image): Map strike index.

	* src/truetype/ttdriver.c (tt_size_select): Revert change.

2016-09-09  Werner Lemberg  <wl (a] gnu.org>

	[ftfuzzer] Minor improvements.

	* src/tools/ftfuzzer/ftfuzzer.cc (LLVMFuzzerTestOneInput): Ignore
	invalid strikes.
	Use better values for call to `FT_Set_Char_Size'.

2016-09-09  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Don't provide (completely) broken strike data.

	FreeType tries to sanitize strike header data; we now reject
	completely broken ones.

	* include/freetype/internal/tttypes.h (TT_FaceRec): New
	`sbit_strike_map' array pointer.

	* src/base/ftobjs.c (FT_Match_Size): Reject matches where either
	width or height would be zero.
	Add tracing message in case of error.

	* src/sfnt/sfobjs.c (sfnt_load_face): Populate `sbit_strike_map',
	only using (more or less) valid strike header data for
	FT_Face's `available_sizes' array.
	(sfnt_done_face): Updated.

	* src/sfnt/ttsbit.c (tt_face_set_sbit_strike): Use
	`sbit_strike_map'.
	(tt_face_load_strike_metrics): Improve tracing.

	* src/truetype/ttdriver.c (tt_size_select): Use `sbit_strike_map'.

2016-09-08  Werner Lemberg  <wl (a] gnu.org>

	* Version 2.7 released.
	=======================


	Tag sources with `VER-2-7'.

	* docs/VERSION.TXT: Add entry for version 2.7.

	* README, Jamfile (RefDoc), builds/windows/vc2005/freetype.vcproj,
	builds/windows/vc2005/index.html,
	builds/windows/vc2008/freetype.vcproj,
	builds/windows/vc2008/index.html,
	builds/windows/vc2010/freetype.vcxproj,
	builds/windows/vc2010/index.html,
	builds/windows/visualc/freetype.dsp,
	builds/windows/visualc/freetype.vcproj,
	builds/windows/visualc/index.html,
	builds/windows/visualce/freetype.dsp,
	builds/windows/visualce/freetype.vcproj,
	builds/windows/visualce/index.html,
	builds/wince/vc2005-ce/freetype.vcproj,
	builds/wince/vc2005-ce/index.html,
	builds/wince/vc2008-ce/freetype.vcproj,
	builds/wince/vc2008-ce/index.html: s/2.6.5/2.7/, s/265/27/.

	* include/freetype/freetype.h (FREETYPE_MINOR): Set to 7.
	(FREETYPE_PATCH): Set to 0.

	* builds/unix/configure.raw (version_info): Set to 18:6:12.
	* CMakeLists.txt (VERSION_MINOR): Set to 7.
	(VERSION_PATCH): Set to 0.

	* docs/CHANGES: Updated.

2016-09-08  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttinterp.c: Include `ttgxvar.h'.

	This fixes the `multi' build.

2016-09-08  Werner Lemberg  <wl (a] gnu.org>

	[autofit] Another improvement to Armenian support.

	Suggested by Hrant H Papazian <hpapazian (a] gmail.com>.

	* src/autofit/afscript.h: Use better suited characters to derive
	default stem widths.

2016-09-07  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/smooth/ftgrays.c (gray_hline): Micro-optimize.

2016-09-06  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Operate in absolute bitmap coordinates.

	Simpler bitmap addressing improves performance by 1.5%.

	* src/smooth/ftgrays.c (gray_TWorker): Remove count fields.
	(gray_dump_cells, gray_find_cell, gray_set_cell, gray_hline,
	gray_sweep, gray_convert_glyph, gray_raster_render): Updated.

2016-09-06  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Improve contour start (take 2).

	* src/smooth/ftgrays.c (gray_move_to): Call `gray_set_cell' directly
	instead of...
	(gray_start_cell): ... this function, which is removed.
	(gray_convert_glyph): Make initial y-coordinate invalid.

2016-09-06  Werner Lemberg  <wl (a] gnu.org>

	[type1] MM fonts support exactly zero named instances (#48748).

	* src/type1/t1load.c (T1_Get_MM_Var): Set `num_namedstyles' to zero.

2016-09-06  Jonathan Kew  <jfkthame (a] gmail.com>

	[cff] Fix uninitialized memory.

	Problem reported as

	  https://bugzilla.mozilla.org/show_bug.cgi?id=1270288

	* src/cff/cf2intrp.c (cf2_interpT2CharString): Initialize `storage'
	array to handle a `get' opcode without a previous `put'.

2016-09-05  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/smooth/ftgrays.c (gray_move_to, gray_start_cell): Revert.

2016-09-05  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Improve contour start.

	* src/smooth/ftgrays.c (gray_move_to): Call `gray_set_cell' directly
	instead of...
	(gray_start_cell): ... this function, which is removed.

2016-09-05  Werner Lemberg  <wl (a] gnu.org>

	[cff] Fix memory initialization.

	* src/cff/cf2stack.c (cf2_stack_init): Use `FT_NEW'.  The `Q'
	variants of FreeType's memory allocation macros don't do zeroing.

2016-09-05  Werner Lemberg  <wl (a] gnu.org>

	[ftrandom] Minor improvements.

	* src/tools/ftrandom/ftrandom.c (_XOPEN_SOURCE): New macro, set to
	500.

	* src/tools/ftrandom/Makefile (CFLAGS): Split off include
	directories to ...
	(INCLUDES): ... this new variable.
	(LDFLAGS): New variable.
	(ftrandom.o, ftrandom): Updated.

2016-09-05  Werner Lemberg  <wl (a] gnu.org>

	[autofit] Improve Armenian support.

	Thanks to Hrant H Papazian <hpapazian (a] gmail.com> for help.

	* src/autofit/afblue.dat (AF_BLUE_STRING_ARMENIAN_*): Improve
	selection of characters.

	* src/autofit/afblue.c, src/autofit/afblue.h: Regenerated.

2016-09-04  Werner Lemberg  <wl (a] gnu.org>

	[ftrandom] Improve Makefile.

	It now supports both a normal build (`./configure && make') and a
	development build (`make devel').

	* src/tools/ftrandom/Makefile (VPATH): Set it so that
	`libfreetype.a' gets searched in both `objs' (for the development
	build) and `objs/.libs' (for a normal build which uses libtool).
	(LIBS): Add missing libraries.
	(ftrandom.o): New rule.
	(ftrandom): Use automatic variables.

2016-09-03  Werner Lemberg  <wl (a] gnu.org>

	[truetype] More fixes for handling of GX deltas.

	Problems reported by Bob Taylor <Bob.Taylor (a] monotype.com>.

	* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Fix rough
	sanity test for glyph variation array header size.
	Always set stream position before reading packed x and y deltas.
	Fix thinko w.r.t. `localpoints' array.

2016-09-03  Werner Lemberg  <wl (a] gnu.org>

	[ftrandom] Various fixes.

	* src/tools/ftrandom/ftrandom.c (GOOD_FONTS_DIR): Provide better
	default.
	(error_fraction): Make it of type `double' to work as advertized 
	this was completely broken.
	Update all related code.
	(error_count, fcnt): Make it unsigned to fix compiler warnings.
	Update all related code.
	(fontlist): Change `len' member to `long' to fix compiler warnings.
	(FT_MoveTo, FT_LineTo, FT_ConicTo, FT_CubicTo, abort_test): Tag
	unused variables.
	(TestFace, FindFonts, copyfont, do_test): Fix compiler warnings.
	(ExecuteTest): Ditto.
	Call `FT_Done_FreeType'.
	(getErrorCnt): Replace `ceil' with an ordinary cast to `unsigned
	int'.
	(usage): Improve output.
	(main): Fix compiler warnings.

	* src/tools/ftrandom/README: Updated.

2016-09-03  Werner Lemberg  <wl (a] gnu.org>

	[base] Avoid negative bitmap strike dimensions (#48985).

	* src/base/ftobjs.c (FT_Open_Face): Check whether negation was
	actually successful.  For example, this can fail for value
	-32768 if the type is `signed short'.  If there are problems,
	disable the strike.

2016-09-03  Werner Lemberg  <wl (a] gnu.org>

	[cff] Avoid null pointer passed to FT_MEM_COPY (#48984).

	* src/cff/cffload.c (cff_index_get_name): Check `byte_len'.

2016-09-02  Werner Lemberg  <wl (a] gnu.org>

	[unix] Enable 64bit support in file system access (#48962).

	* builds/unix/configure.raw: Call `AC_SYS_LARGEFILE'.

2016-09-02  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Avoid left shift of negative value (#48980).

	* src/sfnt/ttsbit.c (tt_sbit_decoder_load_bit_aligned): Use unsigned
	constant.

2016-09-02  Werner Lemberg  <wl (a] gnu.org>

	* src/smooth/ftgrays.c (gray_hline): Fix clang compiler warnings.

2016-09-02  Werner Lemberg  <wl (a] gnu.org>

	Some preparations for the next release.

	* include/freetype/config/ftoption.h
	(TT_CONFIG_OPTION_SUBPIXEL_HINTING): Enable.

	* docs/CHANGES: Updated.

2016-09-01  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Simplify span rendering more.

	It turns out that there is significant cost associated with `FT_Span'
	creation and calls to `gray_render_span' because it happens so
	frequently. This removes these steps from our internal use but leaves
	it alone for `FT_RASTER_FLAG_DIRECT" to preserve API. The speed gain
	is about 5%.

	* src/smooth/ftgrays.c (gray_render_span): Removed. The code is
	migrated to...
	(gray_hline): ... here.

2016-08-30  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Streamline pixmap drawing a bit more.

	Zero coverage is unlikely (1 out of 256) to warrant checking. This
	gives 0.5% speed improvement in rendering simple glyphs.

	* src/smooth/ftgrays.c (gray_hline, gray_render_span): Remove checks.

2016-08-29  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Streamline pixmap drawing.

	This gives 2% speed improvement in rendering simple glyphs.

	* src/smooth/ftgrays.c (TPixmap): Reduced pixmap descriptor with a
	pointer to its bottom-left and pitch to be used in...
	(gray_TWorker): ... here.
	(gray_render_span): Move pixmap flow check from here...
	(gray_raster_render): .. to here.

2016-08-27  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Reduce stack of band boundaries.

	* src/smooth/ftgrays.c (gray_TBand): Removed.
	(gray_convert_glyph): Updated to stack band boundaries concisely.

2016-08-26  Werner Lemberg  <wl (a] gnu.org>

	* src/cid/cidload.c (cid_face_open): Improve handling of `SDBytes'.

2016-08-26  Werner Lemberg  <wl (a] gnu.org>

	[cid] Fix commit from 2016-05-16.

	* src/cid/cidparse.c (cid_parser_new): Fix off-by-one errors.

2016-08-26  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Cache offset and size to bitmap data table.

	This commit avoids `EBDT' and friends being looked up again and
	again while loading a single embedded bitmap.

	* include/freetype/internal/tttypes.h (TT_FaceRec)
	[TT_CONFIG_OPTION_EMBEDDED_BITMAPS]: New fields `ebdt_start' and
	`ebdt_size'.

	* src/sfnt/ttsbit.c (tt_sbit_decoder_init): Move table lookup to ...
	(tt_face_load_sbit): ... this function; also store the table size
	and offset.

2016-08-26  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/smooth/ftgrays.c (gray_raster_render): Minor tweaks.

2016-08-26  Werner Lemberg  <wl (a] gnu.org>

	[type1] Fix heap buffer overflow.

	Reported as

	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36

	* src/type1/t1load.c (parse_charstrings): Reject fonts that don't
	contain glyph names.

2016-08-25  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Fix previous commit (#48901).

	* src/sfnt/ttcmap.c (tt_cmap4_char_map_binary): Thinkos.

2016-08-25  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Speed up handling of invalid format 4 cmaps.

	* src/sfnt/ttcmap.c (tt_cmap4_next, tt_cmap4_char_map_binary): Add
	tests for `num_glyph' from `tt_cmap4_char_map_linear'.

2016-08-25  Werner Lemberg  <wl (a] gnu.org>

	* include/freetype/internal/ftdriver.h: Remove unused typedefs.

2016-08-22  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Simplify span rendering.

	This removes unnecessary complexity of span merging and buffering.
	Instead, the spans are rendered as they come, speeding up the
	rendering by about 5% as a result.

	* src/smooth/ftgrays.c [FT_MAX_GRAY_SPANS]: Macro removed.
	(gray_TWorker): Remove span buffer and related fields.
	(gray_sweep, gray_hline): Updated.

	* include/freetype/ftimage.h: Remove documentation note about
	`FT_MAX_GRAY_SPANS', which was never in `ftoption.h' and is now gone.

2016-08-16  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix `MPS' instruction.

	According to Greg Hitchcock, MPS in DWrite really returns the point
	size.

	* src/truetype/ttobjs.h (TT_SizeRec): Add `point_size' member.

	* src/truetype/ttdriver.c (tt_size_request): Set `point_size'.

	* src/truetype/ttinterp.h (TT_ExecContextRec): Add `pointSize'
	member.

	* src/truetype/ttinterp.c (TT_Load_Context): Updated.
	(Ins_MPS): Fix instruction.

2016-08-16  Werner Lemberg  <wl (a] gnu.org>

	[lzw] Optimize last commit.

	* src/lzw/ftzopen.c (ft_lzwstate_get_code): Move check into
	conditional clause.

2016-08-16  Werner Lemberg  <wl (a] gnu.org>

	[lzw] Avoid invalid left shift.

	Reported as

	  https://bugzilla.mozilla.org/show_bug.cgi?id=1295366

	* src/lzw/ftzopen.c (ft_lzwstate_get_code): Limit `num_bits'.

2016-08-16  Werner Lemberg  <wl (a] gnu.org>

	[lzw] Avoid buffer overrun.

	Reported as

	  https://bugzilla.mozilla.org/show_bug.cgi?id=1273283

	* src/lzw/ftzopen.c (ft_lzwstate_refill): Ensure `buf_size' doesn't
	underflow.

2016-08-16  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix compiler warning.

	* src/truetype/ttgload.c (load_truetype_glyph): Add cast.

2016-08-13  Werner Lemberg  <wl (a] gnu.org>

	[winfonts] Avoid zero bitmap width and height.

	Reported as

	  https://bugzilla.mozilla.org/show_bug.cgi?id=1272173

	* src/winfonts/winfnt.c (FNT_Face_Init): Check zero pixel height.
	(FNT_Load_Glyph): Check for zero pitch.

2016-08-11  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/truetype/ttinterp.c (Pop_Push_Count): Revert changes.

2016-08-11  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/truetype/ttinterp.c (TT_RunIns): Minor and formatting.

2016-08-11  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	* src/truetype/ttinterp.c (Pop_Push_Count): Fix some entries.

2016-08-10  Peter Klotz  <Peter.Klotz (a] ith-icoserve.com>

	* src/smooth/ftgrays.c (gray_hline): Fix uninitialized access.

2016-08-10  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Use correct type for `italicAngle' field (#48732).

	* src/sfnt/ttload.c (tt_face_load_post): Fix types.

2016-08-06  Jon Spencer  <jon (a] jonspencer.ca>

	[sfnt] Fix `FT_Get_Advance' for bitmap strikes.

	`FT_Get_Advance' returns 0 for bitmap fonts.  It first gets the
	advance value from the font table and then scales it by the
	`font->size->metrics->x_scale' field.  But `FT_Select_Size' doesn't
	set that value for bitmap fonts and the advance gets scaled to zero.

	Taken from

	  https://github.com/behdad/harfbuzz/issues/252

	* src/sfnt/ttsbit.c (tt_face_load_strike_metrics)
	<TT_SBIT_TABLE_TYPE_EBLC>: Set scale values.

2016-08-06  Behdad Esfahbod  <behdad (a] behdad.org>

	[truetype] Fix GX variation handling of composites.

	* src/truetype/ttgload.c (load_truetype_glyph)
	[TT_CONFIG_OPTION_GX_VAR_SUPPORT]: Check `ARGS_ARE_XY_VALUES' flag.

2016-08-05  Alexei Podtelezhnikov  <apodtele (a] gmail.com>

	[smooth] Minor refactoring.

	* src/smooth/ftgrays.c (gray_render_scanline, gray_render_line):
	Updated.

2016-07-29  Werner Lemberg  <wl (a] gnu.org>

	[sfnt, truetype] Don't abort on invalid `maxComponentDepth'.

	Since 2016-05-16 we detect infinite recursion directly.

	* src/sfnt/ttload.c (tt_face_load_maxp): Don't adjust
	`maxComponentDepth'.
	* src/truetype/ttgload.c (load_truetype_glyph): Don't abort if
	`maxComponentDepth' is not valid.  Instead, simply adjust its value
	and emit a tracing message.

2016-07-26  Werner Lemberg  <wl (a] gnu.org>

	* src/autofit/aflatin.c (af_latin_metrics_scale_dim): Minor.

	No functional change.

2016-07-22  Hin-Tak Leung  <htl10 (a] users.sourceforge.net>

	[truetype] Record the end of IDEFs.

	To match the logic in FDEF.  The value of the end is only used for
	bound-checking in `Ins_JMPR', so it may not have been obvious that
	it was not recorded.  Tested (as part of Font Validator 2.0) all the
	fonts on Fedora and did not see any change.

	* src/truetype/ttinterp.c (Ins_IDEF): Updated.

2016-07-19  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Sanitizer fix, second try.

	* src/truetype/ttgxvar.c (ft_var_readpackedpoints): Fix boundary
	tests and use only one slot more.

2016-07-19  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Sanitizer fix.

	* src/truetype/ttgxvar.c (ft_var_readpackedpoints): Increase array
	to fix nested loops.

2016-07-18  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Make GETDATA work only for GX fonts.

	* src/truetype/ttinterp.c (opcode_name): Updated.
	(Ins_GETDATA): Only define for `TT_CONFIG_OPTION_GX_VAR_SUPPORT'.
	(TT_RunIns): Updated.

2016-07-17  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Add support for Apple's

	  GETDATA[], opcode 0x92

	bytecode instruction.  It always returns 17, and we have absolutely
	no idea what it is good for...

	* src/truetype/ttinterp.c (Pop_Push_Count, opcode_name): Updated.
	(Ins_GETDATA): New function.
	(TT_RunIns): Add it.

2016-07-16  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Add bytecode support for GX variation fonts.

	This commit implements undocumented (but confirmed) stuff from
	Apple's old bytecode engine.

	  GETVARIATION[], opcode 0x91
	    This opcode pushes normalized variation coordinates for all axes
	    onto the stack (in 2.14 format).  Coordinate of first axis gets
	    pushed first.

	  GETINFO[], selector bit 3
	    If GX variation support is enabled, bit 10 of the result is set
	    to 1.

	* src/truetype/ttinterp.c: Include FT_MULTIPLE_MASTERS_H.
	(opcode_name) [TT_CONFIG_OPTION_GX_VAR_SUPPORT]: Updated.
	(Ins_GETINFO) [TT_CONFIG_OPTION_GX_VAR_SUPPORT]: Handle selector
	bit 3, checking support for variation glyph hinting.
	(Ins_GETVARIATION) [TT_CONFIG_OPTION_GX_VAR_SUPPORT]: New function
	to implement opcode 0x91.
	(TT_RunIns) [TT_CONFIG_OPTION_GX_VAR_SUPPORT]: Handle opcode 0x91.

2016-07-16  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix GETINFO bytecode instruction.

	* src/truetype/ttinterp.c (Ins_GETINFO): Fix return value for
	stretching information.

2016-07-16  Behdad Esfahbod  <behdad (a] behdad.org>

	[truetype] Make all glyphs in `Zycon' GX font work.

	* src/truetype/ttgxvar.c (ft_var_readpackedpoints): Fix boundary
	tests.

2016-07-16  Werner Lemberg  <wl (a] gnu.org>

	[truetype] Fix GX delta tracing.

	* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Trace
	relative point movements.

2016-07-16  Behdad Esfahbod  <behdad (a] behdad.org>

	[truetype] More fixes for GX.

	This finally fixes the rendering of the cyclist and the lizard in
	the `Zycon' font.

	* src/truetype/ttgxvar.c (ft_var_readpackedpoints): `first' point
	index is always cumulative.

	(tt_handle_deltas): Rename to...
	(tt_interpolate_deltas): ... This.
	Add new parameter for output point array.
	Update caller.

	(TT_Vary_Apply_Glyph_Deltas): Add `points_out' array; it now holds
	the intermediate results of `tt_interpolate_deltas' that are to be
	added to `outline->points'.

2016-07-15  Werner Lemberg  <wl (a] gnu.org>

	* src/autofit/aflatin.c (af_latin_hints_compute_segments): Thinko.

	`max_pos' is always larger than `min_pos' so `FT_ABS' is not needed.

	Reported by Alexei.

2016-07-16  Nikolaus Waxweiler  <madigens (a] gmail.com>

	* src/truetype/ttinterp.c (Ins_MIRP): Fix copy-and-paste error.

	Problem reported by Hin-Tak Leung.

2016-07-15  Werner Lemberg  <wl (a] gnu.org>

	[autofit] Update and improve segment and edge tracing.

	* src/autofit/afhints.c (af_glyph_hints_dump_segments): Trace
	`delta' also.
	Don't show first point of segment as a replacement for `pos'; this
	is (a) misleading, since the difference to `pos' can be almost
	arbitrarily large in corner cases, and (b) it is better to have all
	segment data in font units instead of a single value given in output
	space coordinates.
	Improve layout.
	(af_glyph_hints_dump_edges): Show px->units and units->px conversion
	values for convenience.
	Improve layout.

2016-07-15  Werner Lemberg  <wl (a] gnu.org>

	[autofit] For edges, reject segments wider than 1px (#41334).

	* src/autofit/afhints.h (AF_SegmentRec): New member `delta'.

	* src/autofit/aflatin.c (af_latin_hints_compute_segments): Compute
	`delta'.
	(af_latin_hints_compute_edges): Reject segments with a delta larger
	than 0.5px.

2016-07-14  Werner Lemberg  <wl (a] gnu.org>

	* include/freetype/freetype.h (FT_IS_NAMED_INSTANCE): New macro.

2016-07-14  Werner Lemberg  <wl (a] gnu.org>

	[sfnt] Fix `face_index' value in `FT_Face' for named instances.

	* src/sfnt/sfobjs.c (sfnt_init_face): Don't strip off higher 16bits.

2016-07-14  Werner Lemberg  <wl (a] gnu.org>

	* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Fix tracing.

2016-07-14  Behdad Esfahbod  <behdad (a] behdad.org>

	[truetype] Fix gxvar delta interpolation.

	The coordinates of the base font should be used for interpolation
	purposes, NOT the current points (i.e., the result of accumulation
	of previous deltas).

	* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Initialize
	`points_org' before looping over all tuples.


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Copyright 2016-2018 by
David Turner, Robert Wilhelm, and Werner Lemberg.

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