Commit Graph

6921 Commits

Author SHA1 Message Date
Werner Lemberg 04a6443254 [sdf] Add copyright notices. 2020-12-24 08:29:05 +01:00
Werner Lemberg eb2b5bb107 docs/CHANGES: Mention new SDF module. 2020-12-24 07:44:16 +01:00
Anuj Verma b298a64464 [sdf] Add debugging function.
* src/sdf/ftsdf.c (sdf_shape_dump): New function.
2020-12-24 07:23:48 +01:00
Anuj Verma 6444875f68 [sdf] Add brief technical overview of both rasterizers. 2020-12-24 07:23:48 +01:00
Anuj Verma 6cd6df55c9 [sdf] Add 'bsdf' renderer to 'sdf' module.
* src/sdf/ftsdfrend.c (ft_bsdf_render): New function.

(ft_bitmap_sdf_renderer_class): New structure.
2020-12-24 07:23:48 +01:00
Anuj Verma d27d107f15 [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.
2020-12-24 07:23:48 +01:00
Anuj Verma a21134751c [sdf] Add function to copy SDF data into output bitmap.
* src/sdf/ftbsdf.c (finalize_sdf): New function.
2020-12-24 07:23:48 +01:00
Anuj Verma e2ae96b978 [sdf] Add '8-point sequential Euclidean distance mapping' algorithm.
* src/sdf/ftbsdf.c (compare_neighbor, first_pass, second_pass,
edt8): New functions.
2020-12-24 07:23:48 +01:00
Anuj Verma 6b9a8044be [sdf] Add function to copy source bitmap to distance map.
* src/sdf/ftbsdf.c (bsdf_init_distance_map): New function.
2020-12-24 07:23:48 +01:00
Anuj Verma 0f644f38e9 [sdf] Add functions to compute pixel edge distances.
* src/sdf/ftbsdf.c (compute_edge_distance, bsdf_approximate_edge):
New functions.
2020-12-24 07:23:48 +01:00
Anuj Verma c576176461 [sdf] Add function to find edge pixels in a grid of alpha values.
* src/sdf/ftbsdf.c (bsdf_is_edge): New function.
2020-12-24 07:23:48 +01:00
Anuj Verma 9bbb3611b3 [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.
2020-12-24 07:23:48 +01:00
Anuj Verma c6f394bf7d [sdf] Add 'sdf' module to non-gnumake build systems.
* include/freetype/config/ftmodule.h: Add both the 'sfd' and 'bsfd'
renderers to the list of modules.

* CMakeLists.txt (BASE_SRCS): Add 'sdf' single-object module.
2020-12-24 07:23:48 +01:00
Anuj Verma 05f6088df3 [sdf] Added basic overlapping contour support.
* src/sdf/ftsdf.c (sdf_generate_with_overlaps): New function.
(sdf_raster_render): Enable it.
2020-12-24 07:23:48 +01:00
Anuj Verma 879ca87f0b [sdf] Add build infrastructure.
* src/sdf/module.mk, src/sfd/rules.mk: New files.

* src/sdf/ftsdf.h (ft_sdf_raster): New forward declaration.

* include/freetype/ftmoderr.h (FT_MODERRDEF): Add error definition
for the 'sdf' module.

* include/freetype/internal/fttrace.h (FT_TRACE_DEF): Add trace
definition for the `sdf' module.

* modules.cfg (RASTER_MODULES): Add the `sdf' module to the list of
rasterizers.
2020-12-24 07:23:48 +01:00
Anuj Verma 665ac96792 [sdf] Add interface functions for the 'sdf' rasterizer.
* src/sdf/ftsdf.c (sdf_raster_new, sdf_raster_reset,
sdf_raster_set_mode, sdf_raster_render, sdf_raster_done): New
functions.
(ft_sdf_raster): New structure.
2020-12-24 07:23:48 +01:00
Anuj Verma 1010f2c39c [sdf] Add subdivision and bounding box optimization.
* src/sdf/ftsdf.c (sdf_generate_bounding_box): New function, which
is an optimized version of `sdf_generate`.
(sdf_generate_subdivision): New function.
2020-12-24 07:23:48 +01:00
Anuj Verma 986d3108ac [sdf] Add function to generate SDF.
* src/sdf/ftsdf.c (sdf_generate): New function, currently disabled.
This is a proof-of-concept implementation: It doesn't use any
optimization, it simply checks all grid points against all contours.
2020-12-24 07:23:48 +01:00
Anuj Verma 0d52f4ae0a [sdf] Add functions to get shortest distance from any edge/contour.
* src/sdf/ftsdf.c (sdf_edge_get_min_distance): New function.
(sdf_contour_get_min_distance): New function, currently disabled.
2020-12-24 07:23:48 +01:00
Anuj Verma 81e32986ca [sdf] Add shortest distance finding functions.
* src/sdf/ftsdf.c (get_min_distance_line, get_min_distance_conic,
get_min_distance_cubic): New functions.  Note that
`get_min_distance_conic` comes with two implementations (using an
analytical and an iterative method, to be controlled with the
`USE_NEWTON_FOR_CONIC` macro).
2020-12-24 07:23:48 +01:00
Anuj Verma c918b54f25 [sdf] Add function to resolve corner distances.
* src/sdf/ftsdf.c (resolve_corner): New function.
2020-12-24 07:23:48 +01:00
Anuj Verma a255125fe4 [sdf] Add essential math functions.
* src/sdf/ftsdf.c (cube_root, arc_cos) [!USE_NEWTON_FOR_CONIC]: New
auxiliary functions.

* src/sdf/ftsdf.c (solve_quadratic_equation, solve_cubic_equation)
[!USE_NEWTON_FOR_CONIC]: New functions.
2020-12-24 07:23:48 +01:00
Anuj Verma cd4138458a [sdf] Add utility functions for contours.
* src/sdf/ftsdf.c (get_control_box, get_contour_orientation): New
functions.
(split_conic, split_cubic, split_sdf_conic, split_sdf_cubic,
split_sdf_shape): New functions.
2020-12-24 07:23:47 +01:00
Anuj Verma 2de1b5630d [sdf] Add functions to decompose `FT_Outline`.
* src/sdf/ftsdf.c (sdf_move_to, sdf_line_to, sdf_conic_to,
sdf_cubic_to): New auxiliary decomposition functions.
(sdf_compose_funcs): New structure.
(sdf_outline_decompose): New function.
2020-12-24 07:23:47 +01:00
Anuj Verma cf0464d855 [sdf] Structs, enums, macros, and functions for 'sdf' rasterizer.
* src/sdf/ftsdf.c (FT_DEBUG_INNER, FT_ASSIGNP_INNER)
[FT_DEBUG_LEVEL_TRACE && FT_DEBUG_MEMORY]: New macros.
(SDF_MemoryUser) [FT_DEBUG_LEVEL_TRACE && FT_DEBUG_MEMORY]: New
struct for memory usage tracing.
(sdf_alloc, sdf_free) [FT_DEBUG_LEVEL_TRACE && FT_DEBUG_MEMORY]: New
functions for memory usage tracing.

(SDF_ALLOC, SDF_FREE): New macros for memory management.
(SDF_MEMORY_TRACKER_DECLARE, SDF_MEMORY_TRACKER_SETUP,
SDF_MEMORY_TRACKER_DONE): New macros to set up memory usage tracing.

(USE_NEWTON_FOR_CONIC, MAX_NEWTON_DIVISIONS, MAX_NEWTON_STEPS,
CORNER_CHECK_EPSILON, CG_DIMEN): New configuration macros for
controlling the process of finding the shortest distance.

(MUL_26D6, VEC_26D6_DOT): New auxiliary macros.

(SDF_TRaster, SDF_Edge, SDF_Contour, SDF_Shape, SDF_Signed_Distance,
SDF_Params): New structs for setting up SDF data.
(SDF_Edge_Type, SDF_Contour_Orientation): New enums for SDF data.

(zero_vector, null_edge, null_contour, null_shape, max_sdf): Useful
constants.

(sdf_edge_new, sdf_edge_done, sdf_contour_new, sdf_contour_done,
sdf_shape_new, sdf_shape_done): New constructors and destructors.
2020-12-24 07:23:47 +01:00
Anuj Verma c6ec87ec48 [sdf] Add raster parameters structure.
* src/sdf/ftsdf.h (SDF_Raster_Params): New structure.

* src/sdf/sdf.c: Include source files in order to make a single
object of the module.
2020-12-24 07:23:47 +01:00
Anuj Verma 56d27d32c4 [sdf] Add 'sdf' renderer.
* src/sdf/ftsdf.c: Add 'sdf' renderer along with its interface
functions.
Also add functions to set and get properties.
2020-12-24 07:23:47 +01:00
Anuj Verma 216270327d [sdf] Add common elements for 'sdf' and 'bsdf' renderers.
* src/sdf/ftsdfrend.h (SDF_Rendere_Module, ft_sdf_renderer_class,
ft_bitmap_sdf_renderer_class): New structures.

* src/sdf/ftsdfcommon.h (DEFAULT_SPREAD, MIN_SPREAD_MAX_SPREAD,
USE_SQUARED_DISTANCES): New macros.
(FT_INT_26D6, FT_INT_16D16, FT_26D6_16D16): New macros.
(FT_CALL, VECTOR_LENGTH_16D16): New macros.
(FT_26D6_Vec, FT_16D16_Vec, FT_16D16, FT_26D6, FT_6D10, FT_CBox):
New typedefs.
(square_root): New macro.

* src/sdf/ftsdferrs.h: Add module error setup.
2020-12-24 07:23:47 +01:00
Anuj Verma cd6ff28a17 [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.
2020-12-24 07:23:47 +01:00
Anuj Verma 5a1b9d014b [base] Allow renderers of different formats.
* src/base/ftobjs.c (FT_Render_Glyph_Internal): Do not return if the
glyph's slot format is `FT_GLYPH_FORMAT_BITMAP`.  The forthcoming
'bsdf' renderer will require bitmaps for processing.

* src/base/ftobjs.c (ft_add_renderer, ft_remove_renderer): Remove
renderer's glyph format check before adding and removing them.  The
'bsdf' renderer will have a format `FT_GLYPH_FORMAT_BITMAP`.
2020-12-24 07:23:47 +01:00
Anuj Verma ec9b6c314d Add data types required for the forthcoming 'sdf' module.
* include/freetype/freetype.h (FT_Render_Mode): Add new render mode
`FT_RENDER_MODE_SDF`, which will be used to generate SDF.

* include/freetype/ftimage.h (FT_Pixel_Mode): Add new pixel mode
`FT_PIXEL_MODE_GRAY16`, which will be the output of the 'sdf'
module.
(FT_RASTER_FLAG_SDF): New raster flag to be used internally by the
'sdf' module.

* include/freetype/fttypes.h (FT_F6Dot10): New data type.
2020-12-24 07:23:47 +01:00
Anuj Verma 3b9196c467 [base] Allow renderers of different formats.
* src/base/ftobjs.c (FT_Render_Glyph_Internal): Do not return if the
glyph's slot format is `FT_GLYPH_FORMAT_BITMAP`.  The forthcoming
'bsdf' renderer will require bitmaps for processing.

* src/base/ftobjs.c (ft_add_renderer, ft_remove_renderer): Remove
renderer's glyph format check before adding and removing them.  The
'bsdf' renderer will have a format `FT_GLYPH_FORMAT_BITMAP`.
2020-12-24 07:23:47 +01:00
Werner Lemberg 2373074a2c * builds/windows/detect.mk (COPY): Make it work with `shell`.
Without this patch, we get the error

  builds/toplevel.mk:127: *** missing separator.  Stop.

Reported by Anuj, with a solution from Alexei.
2020-12-23 22:02:48 +01:00
Ignacio Casal Quinteiro 768022b98e meson.build (ft2_defines): Fix builds on Windows. 2020-12-23 11:30:19 +01:00
Tatsuyuki Ishi 0d5f1dd37c [autofit] Fix double division in stem darkening.
The old code used to divide the darkening amount by em_ratio twice,
leading to unnecessarily bold stems on certain fonts with higher
units per em (e.g. Inter). This patch fixes it.

The return value of af_loader_compute_darkening was also changed to
use 16.16 fixed point to get rid of a redundant truncation operation.
This should slightly improve the precision, although it's still
bottlenecked by the emboldening function, which uses 26.6 fixed point.

* src/autofit/afloader.[ch]
(af_loader_compute_darkening): Return FT_Fixed.
(af_loader_embolden_glyph_in_slot): Revise calculations.
2020-12-18 22:10:30 -05:00
Werner Lemberg 7bdf386e75 ftmodapi.h: Replace 0xA0 characters with spaces. 2020-12-17 22:47:05 +01:00
Alexei Podtelezhnikov c948df52e4 * include/freetype/ftmodapi.h (FT_FACE_DRIVER_NAME): New public macro.
The driver name is needed for `FT_Property_Set' and `FT_Property_Get'.
2020-12-17 15:53:51 -05:00
Alexei Podtelezhnikov 84b3616c94 Documentation edits. 2020-12-16 22:07:57 -05:00
Chris Liddell f6be92767d [truetype] Fix incremental metrics (#59503).
* src/truetype/ttgload.c (tt_get_metrics, load_truetype_glyph):
Previously, the code would populate the phantom points before
calling the `get_glyph_metrics` callback.  For formats like PCL XL
format 1, class 2 downloaded fonts (where metrics are removed from
the TTF header), this causes problems when the hinting program uses
the phantom points (misplaced and distorted glyphs) due to the
metrics being unset (all zeros).
(tt_get_metrics_incr_overrides): Renamed to...
(tt_get_metrics_incremental): ... this.  Updated caller

* include/freetype/ftincrem.h: Update the documentation to make it
clearer that `get_glyph_metrics` is to retrieve metrics from a
non-standard source, but *not* for the purpose of imposing custom
metrics.
2020-12-16 06:08:54 +01:00
Alexei Podtelezhnikov 9cc89717be Documentation edits. 2020-12-15 22:36:19 -05:00
Werner Lemberg a3edbfa983 [type42] Pacify static analysis tools (#59682).
* src/type42/t42objs.c (T42_Size_Init, T42_GlyphSlot_Init): Avoid
warnings about uninitialized variables.
2020-12-14 16:11:06 +01:00
Werner Lemberg bd6d8e4204 .mailmap: Add Priyesh. 2020-12-10 20:23:12 +01:00
Werner Lemberg 505943a6a4 * builds/unix/configure.raw: Don't set `FT_DEBUG_LOGGING`.
All debug options are handled exclusively in `ftoption.h`.
2020-12-07 17:08:37 +01:00
Werner Lemberg 272ae5ee2a * src/*: More fixes for using a '\n' in `FT_TRACE` and `FT_ERROR`. 2020-12-07 10:29:24 +01:00
Werner Lemberg 015a9b8d8f */*: s/FT_LOGGING/FT_DEBUG_LOGGING/. 2020-12-07 10:27:42 +01:00
Werner Lemberg 9f94d8533c docs/CHANGES: Mention `FT_LOGGING`. 2020-12-05 09:43:45 +01:00
Werner Lemberg 7d3ab6a7db * builds/toplevel.mk (do-dist): Remove `submodules` directory. 2020-12-05 09:43:45 +01:00
Werner Lemberg a6adb25626 * src/*: Don't use more than one '\n' in `FT_TRACE` and `FT_ERROR`.
This ensures good logging output, with all lines having a proper
prefix (if requested).
2020-12-05 09:43:45 +01:00
Werner Lemberg 74822f64b0 [base] Don't close 'stderr' after logging.
* src/base/ftdebug.c, builds/windows/ftdebug.c (ft_logging_deinit):
Fix it.
2020-12-05 09:43:45 +01:00
Werner Lemberg c764686bc9 * submodules/dlg: Updated to commit 9f0c8b22. 2020-12-05 09:43:45 +01:00