* src/pfr/pfrsbit.c (pfr_lookup_bitmap_data): Replace `left',
`right', and `middle' with `min', `max', and `mid' as used in other
FreeType binary search code.
(pfr_load_bitmap_metrics): Fix invalid left shift.
We did a binary search for a charcode without ensuring that the
searched data is ordered. Validating the order is now done lazily,
this is, the first access to a bitmap glyph triggers the order check
in the corresponding bitmap strike.
* src/pfr/pfrtypes.h (PFR_BitmapFlags): New values
`PFR_BITMAP_VALID_CHARCODES' and `PFR_BITMAP_CHARCODES_VALIDATED'.
* src/pfr/pfrsbit.c (pfr_lookup_bitmap_data): Make `flags' argument
a pointer. Handle new PFR_BITMAP_XXX flags.
(pfr_slot_load_bitmap): Updated.
Extra items are indicated with different bit positions.
* src/pfr/pfrtypes.h (PFR_GlyphFlags): Replace
`PFR_GLYPH_EXTRA_ITEMS' with `PFR_GLYPH_SIMPLE_EXTRA_ITEMS' and
`PFR_GLYPH_COMPOUND_EXTRA_ITEMS'.
* src/pfr/pfrgload.c (pfr_glyph_load_simple,
pfr_glyph_load_compound): Use them.
* src/pfr/pfrsbit.c (pfr_load_bitmap_metrics): Correctly handle
signed nibbles.
(pfr_slot_load_bitmap): Correctly exit frame in case of error.
Fix invalid left shifts.
* src/smooth/ftgrays.c (gray_render_conic, gray_render_cubic): Move
band clipping from here.
(gray_conic_to, gray_cubic_to): ... to here.
(gray_rander_line, gray_render_scanline): Initialize variables closer
to their use.
We probably did not notice this as all fonts we tested had only
tuple_coords[i] be +1 or -1 for non-intermediate tuples.
* src/truetype/ttgxvar.c (ft_var_apply_tuple): Implement it.
The goal is to avoid integer overflows in the rendering algorithms.
The limit is chosen arbitrarily at some 2^18 pixels, which should be
enough for modern devices including printers.
* src/base/ftoutln.c (FT_Outline_Render): Check CBox and reject
enormous outlines.
* src/autofit/aflatin.c (af_latin_compute_stem_width): Add argument
to pass difference between hinted and unhinted position of base
point; use this to adjust the stem width depending on the PPEM so
that it doesn't become too large under certain circumstances.
Update all callers using value 0 for this argument except...
(af_latin_align_linked_edge): Pass position delta of base point to
`af_latin_compute_stem_width'.
This essentially moves the Sinhala script from the `Indic' hinter to
the `Latin' hinter.
* src/autofit/afblue.dat: Add blue zone data for Sinhala.
* src/autofit/afblue.c, src/autofit/afblue.h: Regenerated.
* src/autofit/afscript.h: Add Sinhala standard character and move data
out of AF_CONFIG_OPTION_INDIC block.
* src/autofit/afranges.c: Move Sinhala data out of
AF_CONFIG_OPTION_INDIC block.
* src/autofit/afstyles.h: Update Sinhala data; in particular, use
AF_WRITING_SYSTEM_LATIN.
An example that gets better rendered is glyph `uusignTaml' (glyph
index 2286) in font `FreeSerif.ttf' (Version 0412.2263) at 22ppem.
* src/autofit/aflatin.c (af_latin_hints_compute_segments): Properly
handle segments where the last point of the first segment is
identical to the first point in the second one. This can happen for
malformed fonts or spikes. We either merge the new segment with the
previous one (both segments point into the same direction), or we
discard the shorter segment if they point into different directions.
* src/autofit/aflatin.c (af_latin_hints_compute_segments): Change
some local variable names to better differentiate between values
along a segment and values orthogonal to it.
In complex glyph shapes, the original logic was too simple to cater
for situations that would actually need something similar to PS Hint
masks. This fix should alleviate the worst cases.
* src/autofit/aflatin.c (af_latin_hint_edges): Don't allow
complete disappearance of stems.
This essentially moves the Tamil script from the `Indic' hinter to
the `Latin' hinter.
* src/autofit/afblue.dat: Add blue zone data for Tamil.
* src/autofit/afblue.c, src/autofit/afblue.h: Regenerated.
* src/autofit/afscript.h: Add Tamli standard character and move data
out of AF_CONFIG_OPTION_INDIC block.
* src/autofit/afranges.c: Move Tamil data out of
AF_CONFIG_OPTION_INDIC block.
* src/autofit/afstyles.h: Update Tamil data; in particular, use
AF_WRITING_SYSTEM_LATIN.
This essentially moves the Malayalam script from the `Indic' hinter
to the `Latin' hinter.
* src/autofit/afblue.dat: Add blue zone data for Malayalam.
* src/autofit/afblue.c, src/autofit/afblue.h: Regenerated.
* src/autofit/afscript.h: Add Malayalam standard characters and move
data out of AF_CONFIG_OPTION_INDIC block.
* src/autofit/afranges.c: Move Malayalam data out of
AF_CONFIG_OPTION_INDIC block.
* src/autofit/afstyles.h: Update Malayalam data; in particular, use
AF_WRITING_SYSTEM_LATIN.
Now all glyphs of MM CFFs like `ITCGaramondMM-It.otf' can be
displayed.
* src/cff/cffgload.c (cff_decoder_parse_charstrings) <cff_op_store,
cff_op_load>: Partially implement it.
* src/cff/cffparse.c (cff_parser_init): Add new parameter to pass
the number of Multiple Master axes.
Update all callers.
(cff_parse_multiple_master): Get number of axes.
(cff_parser_run) <opcode 31>: Updated.
* src/cff/cffparse.h: Updated.
(CFF_ParserRec): Add `num_axes' field.
* src/cff/cffload.c: Updated.
* src/cff/cfftypes.h (CFF_FontRecDictRec): Add `num_axes' field.
We need this to properly trace Multiple Master CFFs, which contain
two SIDs that are charstrings.
This commit makes FreeType also show the last SID, omitted
previously due to a bug.
* src/cff/cfftypes.h (CFF_FontRec): Add `string_pool_size' field.
* src/cff/cffload.c (cff_index_get_pointers): Add argument to return
the pool size.
Update all callers.
* src/cff/cffobjs.c (cff_face_init) [FT_DEBUG_LEVEL_TRACE]: Directly
access `cff->strings' to display the non-default strings.
The new code only displays the first master in the font.
* src/cff/cffgload.c (cff_decode_parse_charstrings): Add new
parameter to allow function calls from dictionaries also.
<cff_op_blend>: Partially implement it.
Update all callers.
* src/cff/cffgload.h: Updated.
* src/cff/cffparse.c (cff_parser_init): Add new parameter to pass the
number of Multiple Master designs.
Update all callers.
(cff_parse_multiple_master): New function to rudimentarily parse
operator.
(cff_parser_run): Handle `T2' operator.
* src/cff/cffparse.h: Updated.
(CFF_ParserRec): Add `num_designs' field.
* src/cff/cffload.c: Updated.
* src/cff/cfftoken.h: Handle `MultipleMaster' operator.
* src/cff/cfftypes.h (CFF_FontRecDictRec): Add `num_designs' field.
* src/sfnt/sfobjs.c (sfnt_init_face): Don't handle `fvar' table for
MM CFFs.
Werner Lemberg