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32cb5390
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2025-09-06T06:14:03
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Update all copyright notices.
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23fa1e35
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2025-08-21T07:09:15
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Updating `CHANGES` file; minor fixes elsewhere (mostly formatting).
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11fa9da7
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2025-05-19T21:07:10
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[sdf] Skip neighbor comparison for pixels near edges.
If the distance of the current pixel to the edge is less than or equal
to 0.5, skip further neighbor comparisons to avoid unnecessary
calculations. When the `USE_SQUARED_DISTANCES` macro is defined,
compare to 0.25 instead.
* src/sdf/ftbsdf.c (compare_neighbor): Add early return for pixels
close to edges to avoid unnecessary neighbor checks.
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f92c9655
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2024-08-13T23:29:13
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Fix various typos.
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47574f7e
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2024-01-27T11:11:22
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Update all copyright notices.
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c8ae37ba
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2023-05-07T21:06:14
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[sdf] Signature fixes.
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da9eb9c7
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2023-02-07T07:01:36
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Fix minor clang and clang++ warnings.
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65f85237
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2023-01-17T09:18:25
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Update all copyright notices.
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ab1c98ac
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2022-01-27T15:23:47
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Fix sdf computation while `USE_SQUARED_DISTANCES`.
Function `map_fixed_to_sdf` expects spread to be absolute
and not squared.
* src/sdf/ftbsdf.c (finalize_sdf): Pass absolute spread
while `map_fixed_to_sdf`.
* src/sdf/ftsdf.c (sdf_generate_bounding_box): Ditto.
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ba5d661f
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2022-01-14T21:54:17
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* src/sdf/ftbsdf.c (ED): s/near/prox/.
This works around the Watcom C definition of `near` as restricted
__near.
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d0cfb4e1
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2022-01-11T10:54:10
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Update all copyright notices.
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4f357118
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2021-12-17T11:22:09
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Clang-Tidy warning fixes.
* src/base/ftobjs.c (FT_Get_Paint): Operator has equivalent nested operands.
* src/bdf/bdflib.c (_bdf_add_property): Value stored to `fp` is never read.
* src/sdf/ftbsdf.c (bsdf_init_distance_map): Value stored to `pixel` is
never read.
* src/sdf/ftsdf.c (split_sdf_shape): Value stored to `error` is never read.
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238245cd
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2021-11-16T22:07:28
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Fix clang++ warnings.
* src/*: Initialize some variables to NULL.
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7f8f0c1c
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2021-09-02T23:30:31
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[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.
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be6ab319
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2021-08-02T09:44:16
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[sdf] Fix out-of-range-access.
* src/sdf/ftbsdf.c (first_pass, second_pass): Fix range during forward pass.
Otherwise the index goes out of range for the last column.
Fixes issue #1077.
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36ee7171
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2021-06-08T09:00:39
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[sdf] Formatting and improved comments.
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2b1d5562
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2021-06-08T08:29:34
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[sdf] Use 8 bits for final SDF output instead of 16bits.
Since 8-bits is enough to represent SDF data we no longer require
16-bits for this purpose. Also, we now normalize the output data
to use the entire 8-bit range efficiently. For example: if we use
3.5 format with a spread of 1 we basically only use the starting
5-bits. By normalizing we can use the entire 8-bit range.
* include/freetype/freetype.h (FT_Render_Mode): Updated description
for `FT_RENDER_MODE_SDF` regarding this change.
* include/freetype/ftimage.h (FT_Pixel_Mode): Removed
`FT_PIXEL_MODE_GRAY16` since no longer required.
* include/freetype/fttypes.h (FT_F6Dot10): Removed since no longer
required.
* src/sdf/ftsdfrend.c (ft_sdf_render, ft_bsdf_render): Allocate 8-bit
bitmap instead of 16-bit buffer.
* src/sdf/ftsdfcommon.h (map_fixed_to_sdf): Added function to convert
16.16 distance value to our desired format.
* src/sdf/ftsdf.c (sdf_generate_with_overlaps,
sdf_generate_bounding_box): Use the new `map_fixed_to_sdf` function
and also use 8-bit output buffer.
* src/sdf/ftbsdf.c (finalize_sdf): Output to a 8-bit buffer instead
of 16-bit buffer.
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a50c39aa
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2021-05-29T09:50:29
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Fix compilation errors and (some) warnings for clang++.
* src/autofit/afmodule.c (AF_GlyphHintsRec): Make it static.
* src/cache/ftcache.c (FTC_Cache_NewNode), src/cache/ftcsbits.c
(ftc_snode_compare): Remove semicolon.
* src/cff/cffparse.c (cff_parser_run): Add `break` statement.
* src/cid/cidload.c (cid_hex_to_binary): Add cast.
* src/sdf/ftbsdf.c (CHECK_NEIGHBOR): Use `do {} while(0)` loop.
(bsdf_init_distance_map, finalize_sdf, bsdf_raster_render): Add
casts.
* src/sdf/ftsdf.c (sdf_generate_bounding_box,
sdf_generate_with_overlaps): Ditto.
* src/sdf/ftsdfcommon.h (square_root): Ditto.
* src/sdf/ftsdfrend.c (sdf_property_get, ft_sdf_render,
ft_bsdf_render): Ditto.
* src/sfnt/ttcolr.c (find_base_glyph_record,
find_base_glyph_v1_record): Fix variable signedness.
(read_color_line): Add cast.
(read_paint): Add casts.
Fix signedness issue.
(tt_face_get_colorline_stops) Fix signedness issues.
* src/sfnt/ttpost.c (load_format_20): Add casts.
* src/truetype/ttsubpix.c (TWEAK_RULES, TWEAK_RULES_EXCEPTIONS):
Remove final semicolons.
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b6e8a712
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2021-01-17T07:18:48
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Update all copyright notices.
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aa1b5362
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2020-12-24T08:32:04
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[sdf] Fix tracing.
* include/freetype/internal.fttrace.h: Add 'bsdf' component.
* src/sdf/ftbsdf.c, src/sdf/ftsdf.c (FT_COMPONENT): Define.
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04a64432
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2020-12-24T08:29:05
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[sdf] Add copyright notices.
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6444875f
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2020-08-21T03:59:23
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[sdf] Add brief technical overview of both rasterizers.
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d27d107f
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2020-08-20T21:25:46
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[sdf] Add interface functions for the 'bsdf' rasterizer.
* src/sdf/ftsdf.c (bsdf_raster_new, bsdf_raster_reset,
bsdf_raster_set_mode, bsdf_raster_render, bsdf_raster_done): New
functions.
(ft_bitmap_sdf_raster): New variable.
* src/sdf/ftsdf.h: Updated.
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a2113475
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2020-08-20T21:21:33
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[sdf] Add function to copy SDF data into output bitmap.
* src/sdf/ftbsdf.c (finalize_sdf): New function.
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e2ae96b9
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2020-08-20T21:19:32
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[sdf] Add '8-point sequential Euclidean distance mapping' algorithm.
* src/sdf/ftbsdf.c (compare_neighbor, first_pass, second_pass,
edt8): New functions.
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6b9a8044
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2020-08-20T21:09:23
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[sdf] Add function to copy source bitmap to distance map.
* src/sdf/ftbsdf.c (bsdf_init_distance_map): New function.
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0f644f38
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2020-08-20T09:25:15
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[sdf] Add functions to compute pixel edge distances.
* src/sdf/ftbsdf.c (compute_edge_distance, bsdf_approximate_edge):
New functions.
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c5761764
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2020-08-20T09:20:26
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[sdf] Add function to find edge pixels in a grid of alpha values.
* src/sdf/ftbsdf.c (bsdf_is_edge): New function.
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9bbb3611
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2020-08-20T09:17:38
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[sdf] Add essential structures for the 'bsdf' rasterizer.
* src/sdf/ftbsdf.c (ONE): New macro.
(BSDF_TRaster, ED, BSDF_Worker): New structures.
(zero_ed): New constant.
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cd6ff28a
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2020-08-16T17:09:22
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[sdf] Add files for new 'sdf' module.
Here is a breakdown of what the files will contain.
* src/sdf/ftsdfrend.c, src/sdf/ftsdfrend.h: The 'sdf' and 'bsdf'
renderers.
* src/sdf/ftsdf.c, src/sdf/ftsdf.h: The rasterizer for the 'sdf'
renderer.
* src/sdf/ftbsdf.c, src/sdf/ftbsdf.h: The rasterizer for the 'bsdf'
renderer.
* src/sdf/ftsdfcommon.h: Commmon properties and functions for both
rasterizers.
* src/sdf/ftsdferrs.h: Common error defines.
* src/sdf/sdf.c: For building a single object of the entire module.
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