path: root/ChangeLog

2016-10-26  Werner Lemberg  <wl@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@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@gnu.org>

	[truetype] Fix SCANTYPE instruction (#49394).

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

2016-10-22  Werner Lemberg  <wl@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@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@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@gnu.org>

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

2016-10-08  Werner Lemberg  <wl@gnu.org>

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

2016-10-08  Werner Lemberg  <wl@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@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@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@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@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@gnu.org>

	[truetype] Disallow bitmap strokes 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@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@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@gnu.org>

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

2016-09-27  Werner Lemberg  <wl@gnu.org>

	[truetype] Trace number of executed opcodes.

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

2016-09-27  Werner Lemberg  <wl@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@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@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@gnu.org>

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

2016-09-24  Werner Lemberg  <wl@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@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@gmail.com>

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

2016-09-14  Alexei Podtelezhnikov  <apodtele@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@gmail.com>

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

2016-09-11  Alexei Podtelezhnikov  <apodtele@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@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@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@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@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@gnu.org>

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

	This fixes the `multi' build.

2016-09-08  Werner Lemberg  <wl@gnu.org>

	[autofit] Another improvement to Armenian support.

	Suggested by Hrant H Papazian <hpapazian@gmail.com>.

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

2016-09-07  Alexei Podtelezhnikov  <apodtele@gmail.com>

	* src/smooth/ftgrays.c (gray_hline): Microptimize.

2016-09-06  Alexei Podtelezhnikov  <apodtele@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@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@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@gmail.com>

	[cff] Fix uninitialized memory.

	Problem reported as

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

	* src/cff/cf2interp.c (cf2_interpT2CharString): Initialize `storage'
	array to handle a `get' opcode without a previous `put'.

2016-09-05  Alexei Podtelezhnikov  <apodtele@gmail.com>

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

2016-09-05  Alexei Podtelezhnikov  <apodtele@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@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@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@gnu.org>

	[autofit] Improve Armenian support.

	Thanks to Hrant H Papazian <hpapazian@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@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@gnu.org>

	[truetype] More fixes for handling of GX deltas.

	Problems reported by Bob Taylor <Bob.Taylor@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@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@gnu.org>

	[base] Avoid negative bitmap stroke 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 stroke.

2016-09-03  Werner Lemberg  <wl@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@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@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@gnu.org>

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

2016-09-02  Werner Lemberg  <wl@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@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 happerns 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@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@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@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@gnu.org>

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

2016-08-26  Werner Lemberg  <wl@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@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@gmail.com>

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

2016-08-26  Werner Lemberg  <wl@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@gnu.org>

	[sfnt] Fix previous commit (#48901).

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

2016-08-25  Werner Lemberg  <wl@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@gnu.org>

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

2016-08-22  Alexei Podtelezhnikov  <apodtele@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@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@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@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@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@gnu.org>

	[truetype] Fix compiler warning.

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

2016-08-13  Werner Lemberg  <wl@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@gmail.com>

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

2016-08-11  Alexei Podtelezhnikov  <apodtele@gmail.com>

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

2016-08-11  Alexei Podtelezhnikov  <apodtele@gmail.com>

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

2016-08-10  Peter Klotz  <Peter.Klotz@ith-icoserve.com>

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

2016-08-10  Werner Lemberg  <wl@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@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@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@gmail.com>

	[smooth] Minor refactoring.

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

2016-07-29  Werner Lemberg  <wl@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@gnu.org>

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

	No functional change.

2016-07-22  Hin-Tak Leung  <htl10@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@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@gnu.org>

	[truetype] Sanitizer fix.

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

2016-07-18  Werner Lemberg  <wl@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@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@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@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@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@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@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@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@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@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@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@gnu.org>

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

2016-07-14  Werner Lemberg  <wl@gnu.org>

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

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

2016-07-14  Werner Lemberg  <wl@gnu.org>

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

2016-07-14  Behdad Esfahbod  <behdad@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.


----------------------------------------------------------------------------

Copyright 2016 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
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