Commit Graph

5464 Commits

Author SHA1 Message Date
Alexei Podtelezhnikov 11d3336af3 [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.
2016-09-01 22:56:24 -04:00
Alexei Podtelezhnikov f44ddfda45 [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 dendering simple glyphs.

* src/smooth/ftgrays.c (gray_hline, gray_render_span): Remove checks.
2016-08-30 23:21:23 -04:00
Alexei Podtelezhnikov e73055c791 [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.
2016-08-29 23:15:35 -04:00
Werner Lemberg a6ee6fe67b s/PIC/FT_CONFIG_OPTION_PIC/ to avoid confusion. 2016-08-28 18:51:50 +02:00
Werner Lemberg bffe5fd6e4 [cff] Minor comment. 2016-08-28 13:16:37 +02:00
Werner Lemberg 516283130c Clarify usage of FT_CONFIG_OPTION_PIC. 2016-08-28 12:38:25 +02:00
Werner Lemberg 3ec64654c4 Explain how to build a PIC-enabled version of FreeType. 2016-08-28 11:02:00 +02:00
Alexei Podtelezhnikov 4d3f7ca8ce [smooth] Reduce stack of band boundaries.
* src/smooth/ftgrays.c (gray_TBand): Removed.
(gray_convert_glyph): Updated to stack band boundaries concisely.
2016-08-27 23:25:54 -04:00
Werner Lemberg 57aa83911a * src/cid/cidload.c (cid_face_open): Improve handling of `SDBytes'. 2016-08-26 11:59:50 +02:00
Werner Lemberg 3c61a2f51d [cid] Fix commit from 2016-05-16.
* src/cid/cidparse.c (cid_parser_new): Fix off-by-one errors.
2016-08-26 11:50:09 +02:00
Werner Lemberg f3e71bab9e [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 10:31:30 +02:00
Werner Lemberg 1034ff4ac0 [sfnt] Comments. 2016-08-26 08:42:27 +02:00
Alexei Podtelezhnikov 9a444f0547 * src/smooth/ftgrays.c (gray_raster_render): Minor tweaks. 2016-08-25 22:36:01 -04:00
Werner Lemberg a660e3de42 [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.
2016-08-26 00:23:27 +02:00
Werner Lemberg 69ce97391c [sfnt] Fix previous commit (#48901).
* src/sfnt/ttcmap.c (tt_cmap4_char_map_binary): Thinkos.
2016-08-25 19:49:52 +02:00
Werner Lemberg acd1879897 [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 17:12:46 +02:00
Werner Lemberg 327f2e3e55 * include/freetype/internal/ftdriver.h: Remove unused typedefs. 2016-08-25 12:46:08 +02:00
Alexei Podtelezhnikov cb4388783c [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% percents 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.
2016-08-22 23:06:45 -04:00
Werner Lemberg a4c2a31138 [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.
2016-08-22 19:32:34 +02:00
Werner Lemberg 4927953f6c MInor. 2016-08-22 07:30:38 +02:00
Werner Lemberg 6432b8c490 Update documentation of size requests. 2016-08-21 10:50:46 +02:00
Werner Lemberg 8521ad99b0 [lzw] Optimize last commit.
* src/lzw/ftzopen.c (ft_lzwstate_get_code): Move check into
conditional clause.
2016-08-16 13:44:38 +02:00
Werner Lemberg 6df68335f1 minor. 2016-08-16 09:50:07 +02:00
Werner Lemberg 548f68d805 [lzw] Avoid invalid left shift.
* src/lzw/ftzopen.c (ft_lzwstate_get_code): Limit `num_bits'.
2016-08-16 09:46:40 +02:00
Werner Lemberg 8d7b9198e3 [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 08:07:58 +02:00
Werner Lemberg cf4224adb9 [truetype] Fix compiler warning.
* src/truetype/ttgload.c (load_truetype_glyph): Add cast.
2016-08-16 06:44:23 +02:00
Werner Lemberg 248f5629d8 [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.
2016-08-13 06:53:53 +02:00
Alexei Podtelezhnikov 125f2b63a5 * src/truetype/ttinterp.c (Pop_Push_Count): Revert changes. 2016-08-11 23:40:05 -04:00
Alexei Podtelezhnikov 49d474f6f6 * src/truetype/ttinterp.c (TT_RunIns): Minor and formatting. 2016-08-11 23:03:09 -04:00
Alexei Podtelezhnikov dce554b1bd * src/truetype/ttinterp.c (Pop_Push_Count): Fix some entries. 2016-08-11 07:29:19 +02:00
Peter Klotz 3b37bfc4b5 * src/smooth/ftgrays.c (gray_hline): Fix uninitialized access. 2016-08-10 22:38:08 -04:00
Werner Lemberg 5224aae8bb [sfnt] Use correct type for `italicAngle' field (#48732).
* src/sfnt/ttload.c (tt_face_load_post): Fix types.
2016-08-10 19:47:29 +02:00
Werner Lemberg 53059f92d6 [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.
2016-08-07 09:01:33 +02:00
Behdad Esfahbod 8183eeb18d [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.
2016-08-06 23:12:55 +02:00
Alexei Podtelezhnikov 97718f3c91 [smooth] Minor refactoring.
* src/smooth/ftgrays.c (gray_render_scanline, gray_render_line):
Updated.
2016-08-05 23:36:16 -04:00
Werner Lemberg 053943a757 [truetype] Comment. 2016-07-30 00:27:48 +02:00
Werner Lemberg fae4ec0525 [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.
2016-07-29 06:43:32 +02:00
Werner Lemberg d9c7f5aa6e * src/autofit/aflatin.c (af_latin_metrics_scale_dim): Minor.
No functional change.
2016-07-26 20:20:27 +02:00
Hin-Tak Leung 3a528bbe5a [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.
2016-07-22 06:59:36 +02:00
Werner Lemberg 7f63105c07 [truetype] Sanitizer fix, second try.
* src/truetype/ttgxvar.c (ft_var_readpackedpoints): Fix boundary
tests and use only one slot more.
2016-07-19 21:35:58 +02:00
Werner Lemberg 9f6426eb16 Thinko; fix previous commit. 2016-07-19 07:23:38 +02:00
Werner Lemberg e69f34b1e2 [truetype] Sanitizer fix.
* src/truetype/ttgxvar.c (ft_var_readpackedpoints): Increase array
to fix nested loops.
2016-07-19 07:06:19 +02:00
Werner Lemberg a3b70d76ba [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.
2016-07-18 06:23:36 +02:00
Werner Lemberg 8c93013ca3 [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.
2016-07-17 22:40:31 +02:00
Werner Lemberg e084360961 [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 18:46:28 +02:00
Werner Lemberg 32a320625e [truetype] Fix GETINFO bytecode instruction.
* src/truetype/ttinterp.c (Ins_GETINFO): Fix return value for
stretching information.
2016-07-16 16:39:26 +02:00
Behdad Esfahbod 69446ddcce [truetype] Make all glyphs in `Zycon' GX font work.
* src/truetype/ttgxvar.c (ft_var_readpackedpoints): Fix boundary
tests.
2016-07-16 10:52:38 +02:00
Werner Lemberg a3b61253a7 [truetype] Fix GX delta tracing.
* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Trace
relative point movements.
2016-07-16 08:16:16 +02:00
Werner Lemberg f147fb2881 [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'.
2016-07-16 07:06:21 +02:00
Werner Lemberg aafff57428 * 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 06:41:39 +02:00