Commit Graph

285 Commits

Author SHA1 Message Date
Alexei Podtelezhnikov
0f23ae2e80 * src/smooth/ftgrays.c (FT_DIV_MOD): Limit the ARM workaround. 2021-10-05 16:28:40 -04:00
Alexei Podtelezhnikov
6190360967 Minor. 2021-09-20 22:18:29 -04:00
Alexei Podtelezhnikov
7f8f0c1c70 [smooth, raster, sdf] Clean up initialization calls.
* src/raster/ftraster.c (ft_black_init): Removed.
(ft_black_new): Clean up.
* src/sdf/ftbsdf.c (bsdf_raster_new): Ditto.
* src/sdf/ftsdf.c (sdf_raster_new): Ditto.
* src/smooth/ftgrays.c (gray_raster_new): Ditto.
2021-09-02 23:30:31 -04:00
Alexei Podtelezhnikov
b6c11d494e [smooth] Reduce shift in multiply-shift optimization.
* src/smooth/ftgrays.c (FT_UDIVPREP, FT_UDIV): Reduce shift.

Smaller shifts that keep the division operands of FT_UDIVPREP within
32 bits result in slightly faster divisions, which is noticeable in
the overall performance.  The loss of precision is tolerable until the
divisors (the components dx and dy) approach 32 - PIXEL_BITS. With
PIXEL_BITS = 8, this corresponds to 65,000 pixels or the bitmap size
that we refuse to render anyway.

Using `ftbench -p -s60 -t5 -bc timesi.ttf`,

Before: 8.52 us/op
After:  8.32 us/op
2021-08-30 07:09:53 -04:00
Ben Wagner
a842a0984b [smooth] Detect SSE2 with MSVC for x86
MSVC does not set `__SSE2__`. Instead one must check whether `_M_IX86_FP` is
defined and greater than or equal to 2.

* src/smooth/ftgrays.c (FT_SSE2): New macro.
Use it where appropriate.
2021-08-27 09:20:26 +02:00
Alexei Podtelezhnikov
3785393d1a Expand comment (cont'd). 2021-08-26 15:31:11 +00:00
Alexei Podtelezhnikov
686e2a5eb3 Expand comment. 2021-08-25 23:18:43 +00:00
Alexei Podtelezhnikov
f7f9cb0dde * src/smooth/ftgrays.c (gray_render_conic): Refactor redundancy. 2021-08-24 15:29:06 -04:00
Alexei Podtelezhnikov
d62d583d92 [smooth] Clean up the null cell usage.
Put the null cell at the end of the pool and store it explicitly so that
we can use it as both the limit and the dumpster.

* src/smooth/ftgrays.c (gray_TWorker): Store the last `cell_null` and
remove unnecesary fields.
(NULL_CELL_PTR, CELL_IS_NULL): Remove in favor of explicit `cell_null`.
(gray_dump_cells, gray_set_cell, gray_sweep{,_direct}): Update callers.
(gray_convert_glyph_inner): Trace remaining cells (oh well).
(gray_convert_glyph): Set up `cell_null` and slightly improve the pool
management.
2021-08-20 23:40:49 -04:00
Alexei Podtelezhnikov
de3b5c201c [smooth] Fortify 64-bit algorithm.
* src/smooth/ftgrays.c (FT_UDIVPREP, FT_UDIV): s/long/FT_Int64/ and
s/unsigned long/FT_UInt64/.
(gray_render_line): Adjust a critical variable type.
2021-08-20 13:51:40 -04:00
Alexei Podtelezhnikov
857038399a Use FT_INT64 instead of FT_LONG64.
* include/freetype/config/integer-types.h: Remove synonymous FT_LONG64.
* include/freetype/internal/ftcalc.h: s/FT_LONG64/FT_INT64/.
* src/base/ftcalc.c: Ditto.
* src/base/fttrigon.c: Ditto.
* src/smooth/ftgrays.c: Ditto.
2021-08-18 23:05:51 -04:00
Werner Lemberg
18fc64e6a3 [smooth] Avoid integer overflow.
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36243

* src/smooth/ftgrays.c(ADD_LONG, SUB_LONG, MUL_LONG, NEG_LONG)
[STANDALONE_]: Removed, unused.
(ADD_INT) [STANDALONE_]: New macro.
(FT_INTEGRATE): Use ADD_INT.
2021-08-07 17:16:52 +02:00
Werner Lemberg
6be8bfe499 [smooth] Fix left shifts of negative numbers.
Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36241

* src/smooth/ftgrays.c (LEFT_SHIFT): New macro.
(gray_render_conic) [BEZIER_USE_DDA]: Use it.
2021-08-06 08:31:22 +02:00
Werner Lemberg
c2fa51d9bd Fix some cppcheck warnings.
* src/bzip2/ftbzip2.c (ft_bzip2_file_skip_output), src/gzip/ftgzip.c
(ft_gzip_file_skip_output): Reduce scope of `delta`.

* src/psaux/psintrp.c, src/psaux/psintrp.h (cf2_interpT2CharString): Add
`const` to `buf` parameter.

* src/raster/ftraster.c (DelOld): Add `const` to `profile` parameter.
(Vertical_Sweep_Span): Reduce scope of `target`.
(FT_Outline_Get_CBox): Reduce scope of `xMin`, `xMax`, `yMin`, `yMax`.

* src/smooth/ftgrays.c (gray_render_conic): Reduce scope of `split`.
(gray_sweep, gray_sweep_direct): Reduce scope of `area`.

* src/tools/apinames.c (names_dump) <OUTPUT_WATCOM_LBC>: Reduce scope of
`temp`.
2021-07-24 20:32:16 +02:00
David Turner
357b353c2a * src/smooth/ftgrays.c: Fix compilation if FT_LONG64 is undefined.
The code assumed that if `__SSE2__` is defined, then 64-bit integer
types are available.  This is not the case apparently for certain
multilib compiler targets like 'x86_32.x86' used by Gentoo.

This patch fixes the issue by disabling the special code path when
64-bit integer types are not available.

Fixes #1071.
2021-07-17 08:31:20 +02:00
Werner Lemberg
552fc97fe5 [smooth] Minor fixes.
* src/smooth/ftgrays.c (gray_render_conic): Move variable and
structure declarations to beginning of function.  Inspite of C99
compliance we still do this for the sake of backward compatibility.
This also avoids a shadowing declaration of `count`.
(gray_convert_glyph_inner): Fix typo.
2021-07-16 07:49:20 +02:00
Werner Lemberg
93771d619f Formatting and ChangeLog additions for previous commits. 2021-07-16 07:40:56 +02:00
Ben Wagner
c37c087382 Guard inclusion of emmintrin.h
Guard inclusion of emmintrin.h with "#ifdef __SSE2__". The gcc version
of this header, xmmintrin.h, and mmintrin.h check that the appropriate
defines are set before defining anything (are internally guarded).
However the clang versions of these includes are not internally guarded.
As a result of this, externally guard the inclusion of these headers.
2021-07-15 11:33:16 -04:00
David Turner
56cc2ad446 [smooth] Implement Bezier quadratic arc flattenning with DDA
Benchmarking shows that this provides a very slighty performance
boost when rendering fonts with lots of quadratic bezier arcs,
compared to the recursive arc splitting, but only when SSE2 is
available, or on 64-bit CPUs.

On a 2017 Core i5-7300U CPU on Linux/x86_64:

  ./ftbench -p -s10 -t5 -cb .../DroidSansFallbackFull.ttf

    Before: 4.033 us/op  (best of 5 runs for all numbers)
    After:  3.876 us/op

  ./ftbench -p -s60 -t5 -cb .../DroidSansFallbackFull.ttf

    Before: 13.467 us/op
    After:  13.385 us/op
2021-07-15 13:25:58 +02:00
David Turner
86b9c9347f [smooth] Minor speedup to smooth rasterizer
This speeds up the smooth rasterizer by avoiding a
conditional branches in the hot path. Namely:

- Define a fixed "null cell" which will be pointed
  to whenever the current cell is outside of the current
  target region. This avoids a "ras.cell != NULL"
  check in the FT_INTEGRATE() macro.

- Also use the null cell as a sentinel at the end of
  all ycells[] linked-lists, by setting its x coordinate
  to INT_MAX. This avoids a 'if (!cell)' check in
  gray_set_cell() as well.

- Slightly change the worker struct fields to perform
  a little less operations during rendering.

Example results (on a 2013 Corei5-3337U CPU)

  out/ftbench -p -s10 -t5 -bc /usr/share/fonts/truetype/droid/DroidSansFallbackFull.ttf

    Before: 5.472 us/op
    After:  5.275 us/op

  out/ftbench -p -s60 -t5 -bc /usr/share/fonts/truetype/droid/DroidSansFallbackFull.ttf

    Before: 17.988 us/op
    After:  17.389 us/op
2021-07-15 13:25:48 +02:00
Alexei Podtelezhnikov
1e0cef9e72 [smooth, raster] Fix up and align error codes.
FT_Render_Glyph picked up FAILURE or 1 returned from the raster
function, which became a confusing error code. Instead, return
Raster_Overflow in the unlikely event that banding does not help or
another meaningful error.

* src/smooth/ftgrays.c (gray_convert_glyph_inner, gray_convert_glyph):
Use Raster_Overflow when the rendering pool is exhausted and return it
if banding does not help.
(gray_raster_render): Use Smooth_Err_Ok.

* src/raster/ftraster.c (Render_Single_Pass): Return Raster_Overflow
if banding does not help or another error code.
2021-06-24 00:19:50 -04:00
Alexei Podtelezhnikov
d8ac180c88 [smooth, raster] Remove synonymous error macros.
* src/smooth/ftgays.c [STANDALONE_]: s/ErrRaster_/Smooth_Err_/.
(gray_convert_glyph_inner): Updated accordingly.

* src/raster/ftraster.c [STANDALONE_]: Do not abbreviate error macros.
(New_Profile, End_Profile, Insert_Y_Turn, Line_Up, Bezier_Up,
Decompose_Curve, Draw_Sweep, Render_Single_Pass, ft_black_render):
Updated accordingly.
2021-06-23 23:32:02 -04:00
Alexei Podtelezhnikov
2d3f5dd294 * src/smooth/ftgrays.c (FT_MAX_GRAY_SPANS): Increase from 10 to 16.
Ten was barely enough for two slanted stems. Sixteen can actually fit
a bit more complicated scanlines.
2021-05-12 17:24:35 -04:00
Alexei Podtelezhnikov
c653b8d2f1 * src/smooth/ftgrays.c (FT_GRAY_SET): Adjust for better code. 2021-05-12 16:17:21 -04:00
Alexei Podtelezhnikov
8f43d324d1 [smooth] Faster bitmap sweeping.
Selecting the fill rule or checking the direct mode each time we call
`gray_hline' is sub-optimal.  This effectively splits the direct mode
into a separate code path while inlining `gray_hline' and saving 5-7%
of rendering time.

* src/smooth/ftgrays.c (gray_hline): Eliminated in favor of...
(FT_FILL_RULE, FT_GRAY_SET): ... these new macros...
(gray_sweep): ... inlined here.
(gray_sweep_direct): New function that handles the direct span buffer.
(gray_TWorker): Remove the span buffer.
(gray_raster_render, gray_convert_glyph): Updated.
2021-05-12 00:04:59 -04:00
Alexei Podtelezhnikov
b070264521 * src/smooth/ftgrays.c (gray_hline): Simplify even-odd computations.
It is too bad the even-odd rule is not used much.
2021-05-10 22:06:01 -04:00
Alexei Podtelezhnikov
fb9bf2efae * src/smooth/ftgrays.c (gray_set_cell): Refactor to fix VC++ warning. 2021-03-15 22:33:17 -04:00
Alexei Podtelezhnikov
80bda804d5 [smooth] Reduce copying during integration phase.
We now record `cover' and `area' directly into the linked list. This
makes rendering faster by 10% or even more at larger sizes.

* src/smooth/ftgrays.c (FT_INTEGRATE): Write directly.
(gray_TWorker): Add direct cell reference and remove unused fields.
(gray_set_cell): Consolidate the linked list management and pointers.
(gray_convert_glyph, gray_convert_glyph_inner): Updated.
2021-03-11 22:40:19 -05:00
Alexei Podtelezhnikov
d5b7de5541 * src/smooth/ftgrays.c (FT_INTEGRATE): New convenience macro.
(gray_render_line, gray_render_scanline): Use it.
2021-03-11 22:08:45 -05:00
Alexei Podtelezhnikov
8516849977 * src/smooth/ftgrays.c (gray_render_line): Rearrange conditionals.
These produce faster or more optimizable code.
2021-03-09 22:14:44 -05:00
Werner Lemberg
b6e8a71266 Update all copyright notices. 2021-01-17 07:18:48 +01:00
Priyesh Kumar
53be1753de Fix `-Wformat' compiler warnings.
* src/*: Fix format specifiers.

* builds/unix/ftsystem.c (FT_Stream_Open): Ditto.
2020-07-28 07:33:40 +02:00
Werner Lemberg
1658685967 Remove redundant inclusion of `ft2build.h'.
* */*: Remove `#include <ft2build.h>' where possible.

* include/freetype/freetype.h: Remove cpp error about missing
inclusion of `ft2build.h'.
2020-06-13 21:15:45 +02:00
David Turner
e13391333f Make macros for header file names optional.
We no longer have to take care of the 8.3 file name limit; this
allows us (a) to introduce longer, meaningful file names, and (b) to
avoid macro names in `#include' lines altogether since some
compilers (most notably Visual C++) doesn't support this properly.

*/*: Replace

   #include FOO_H

with

   #include <freetype/foo.h>

or something similar.  Also update the documentation.
2020-06-08 13:31:55 +02:00
Werner Lemberg
e5038be704 Update all copyright notices. 2020-01-19 17:05:19 +01:00
Alexei Podtelezhnikov
e7ac9288ac [smooth] Restore the span buffering for direct mode only.
The buffer size FT_MAX_GRAY_SPANS is set to 10 spans, which should be
enough to cover the entire scanline for simple glyphs in most cases:
each slightly slanted edge needs up to two spans, plus a filling span
in-between.  This is not new, we used to do it before cb4388783cecc.

* src/smooth/ftgrays.c (gray_TWorker): Add `spans' and `num_spans'.
(gray_hline, gray_sweep): Implement the span buffering.
(gray_raster_render): Use negative `num_spans' to avoid the direct
mode.
2019-06-13 00:17:36 -04:00
Alexei Podtelezhnikov
bdac4cbe6f Rendering considerations. 2019-06-12 21:58:35 -04:00
Werner Lemberg
9159128a92 Silence gcc 7's fall-through warnings in `switch' blocks.
Instead of an intentionally missing `break' statement there must be a
comment line containing `fall through' (and nothing else) right before the
next `case' statement.

See

  https://stackoverflow.com/questions/45129741/gcc-7-wimplicit-fallthrough-warnings-and-portable-way-to-clear-them
2019-05-29 07:51:59 +02:00
Alexei Podtelezhnikov
141e3173db Rendering considerations. 2019-05-20 23:09:59 -04:00
Alexei Podtelezhnikov
bc3b5281ed [smooth] Faster fractions.
* src/smooth/ftgrays.c (SUBPIXELS): Replace with...
(FRACT): A fractional coordinate macro to use in...
(gray_render_line, gray_render_scanline): ... here.
2019-05-08 22:08:40 -04:00
Alexei Podtelezhnikov
8172577380 * src/smooth/ftgrays.c (gray_render_line): Small shortcut. 2019-05-04 08:11:20 -04:00
Alexei Podtelezhnikov
300458eb94 Miscellaneous macro updates.
* src/base/ftoutln.c (SCALED): Updated.
* src/smooth/ftgrays.c (SCALED): Ditto.
(FLOOR, ROUND, CEILING): Removed.
* src/psaux/psfixed.h (cf2_fracToFixed): Updated.
2019-05-03 23:16:42 -04:00
Alexei Podtelezhnikov
2ea511eed8 [smooth] Simplify cubic Bézier flattening.
The previous implementation is correct but it is too complex.
The revised algorithm is based on the fact that each split moves
the control points closer to the trisection points on the chord.
The corresponding distances are good surrogates for the curve
deviation from the straight line.

This cubic flattening algorithm is somewhat similar to the conic
algorithm based the distance from the control point to the middle of
the chord.  The cubic distances, however, decrease less predictably
but are easy enough to calculate on each step.

* src/smooth/ftgrays.c (gray_render_cubic): Replace the split
condition.
2019-04-29 22:49:15 -04:00
Alexei Podtelezhnikov
80475edead [smooth] Bithacks and cosmetics.
* src/smooth/ftgrays.c (gray_record_cell, gray_set_cell, gray_hline,
gray_render_conic, gray_convert_glyph_inner): Updated.
2019-04-26 21:53:00 -04:00
Alexei Podtelezhnikov
7a81b63abc Optimize Bézier bisections.
* src/raster/ftraster.c (Split_Conic, Split_Cubic): Use shifts and
refactor.
* src/smooth/ftgrays.c (gray_split_conic, gray_split_cubic): Ditto.
* src/base/ftstroke.c (ft_conic_split, ft_cubic_split): Ditto.
* src/base/ftbbox.c (cubic_peak): Use shifts.
2019-04-25 22:06:33 -04:00
Alexei Podtelezhnikov
1f271751a3 [smooth] Fix segfault in direct mode (#56092).
* src/base/ftoutln.c (FT_Outline_Render): Set missing clip_box for
direct mode.
* src/smooth/ftgrays.c (gray_raster_render): Use it.
2019-04-11 23:48:21 -04:00
Werner Lemberg
7585997024 Update all copyright notices. 2019-02-23 10:07:09 +01:00
Werner Lemberg
f686ad46a3 Update copyright years. 2019-01-22 20:31:44 +01:00
Werner Lemberg
afa043de9c Fix links (mostly http -> https). 2018-12-25 22:44:05 +01:00
Werner Lemberg
9817571cc9 [ftgrays] Fix typo in stand-alone mode (#54771).
* src/smooth/ftgrays.c (FT_THROW) [STANDALONE_ &&
FT_DEBUG_LEVEL_TRACE]: Fix call to `FT_ERR_CAT'.
2018-10-03 08:04:55 +02:00