261 lines
8.2 KiB
Plaintext
261 lines
8.2 KiB
Plaintext
2020-06-30 Anuj Verma <anujv@iitbhilai.ac.in>
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* src/sdf/ftsdf.c: Avoid parentheses if there is only
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one statement inside a control-flow statement.
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2020-06-30 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added functions to solve polynomial equations.
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* src/sdf/ftsdf.c (solve_quadratic_equation,
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solve_cubic_equation): Added functions to solve
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quadratic and cubic equations. These will be used for
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conic bezier curves only.
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2020-06-30 Anuj Verma <anujv@iitbhilai.ac.in>
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* src/sdf/ftsdf.c (square_root, cube_root, arc_cos):
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Use FT_16D16 instead of FT_Fixed to avoid confusion.
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2020-06-30 Anuj Verma <anujv@iitbhilai.ac.in>
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* src/sdf/ftsdf.c (cube_root, arc_cos): Added a few
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essential math functions.
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2020-06-30 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Fixed compilation under gnumake.
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* src/sdf/rules.mk (DRV_OBJ_ => DRV_OBJS_): Fixed varialbe
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name so that the sdf can compile.
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* src/sdf/module.mk: Fixed spacing.
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* src/sdf/*.c: Fixed all compiler warnings.
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* [GSoC]ChangLog: Fixed dates.
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2020-06-29 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added function to resolve corners in case of
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ambiguity.
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* src/sdf/ftsdf.c (resolve_corner): Added function
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to determine the correct sign in case there are
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two sign for the same shortest distance (happens
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around corners).
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* src/sdf/ftsdf.c: Typo neartest_point -> nearest_point.
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2020-06-29 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] The module can now generate signed distance
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fields for outline with only lines.
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* src/sdf/ftsdf.c (get_min_distance_line): Calculation
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mistake.
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* src/sdf/ftsdf.c (square_root): Added function to calculate
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square root of a 16.16 fixed point integer.
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* src/sdf/ftsdf.c (sdf_generate): Assign values to the output
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bitmap, currently the output is 6.10 fixed point which can
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contain values from [-32, 32]. Also fixed a bug which was
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causing upside down images.
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* src/sdf/ftsdfrend.c (ft_sdf_render): Fixed alignment issues.
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2020-06-28 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added function to find shortest distance from
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a point to a line.
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* src/sdf/ftsdf.c (get_min_distance_line): The function
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calculate the shortest signed distance from a point
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to a line segment.
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* src/sdf/ftsdf.c (sdf_contour_get_min_distance): Typo.
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* src/sdf/ftsdf.c (SDF_Signed_Distance): Use squared
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distance instead of actual distance for performance.
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2020-06-28 Anuj Verma <anujv@iitbhilai.ac.in>
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* src/sdf/ftsdf.c (SDF_Iterator_IO): Removed.
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* src/sdf/ftsdf.c (sdf_edge_iterator_func => sdf_edge_get_min_distance
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sdf_contour_iterator_func => sdf_contour_get_min_distance): Renamed.
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Manually iterate through the lists instead of `FT_List_Iterate' to
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avoid io structs and looks a bit cleaner.
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2020-06-28 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added basic outline of the functions required to
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generate sdf.
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* src/sdf/ftsdf.c (SDF_Signed_Distance): Added struct which
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represent a complete signed distance and can be used to
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get cross, dot, sign etc.
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* src/sdf/ftsdf.c (SDF_Iterator_IO): This struct will be used
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while `FT_List_Iterate'.
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* src/sdf/ftsdf.c (sdf_generate): Added function which genearte
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SDF from `SDF_Shape'.
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* src/sdf/ftsdf.c (sdf_edge_iterator_func,
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sdf_contour_iterator_func): Added funcions
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which iterate through contours and edges and return the shortest
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distance.
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2020-06-27 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added `SDF_Raster_Params' struct which extends
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`FT_Raster_Params' and has a few extra fields. This is done
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to pass extra data to the sdf rasterzier which is required
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while rastersizing.
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* src/sdf/ftsdf.h (SDF_Raster_Params): Added a struct which
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extends `FT_Raster_Params' and has the `spread' parameter.
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Also moved the max, min and default spread values to this
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header file.
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* src/sdf/ftsdf.c (sdf_raster_render): Added parameter and
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attribute checking in order to pick errors and return
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early.
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* src//sdf/ftsdfrend.c (ft_sdf_render): Setup the `SDF_Raster_Params'
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and pass it to the rasterizer instead of `FT_Raster_Params'.
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2020-06-27 Anuj Verma <anujv@iitbhilai.ac.in>
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* include/freetype/ftimage.h (FT_RASTER_FLAG_): Added
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a new raster flag `FT_RASTER_FLAG_SDF'. The `ftsdf'
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rasterizer will only render if this flag is set.
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* src/sdf/ftsdfrend.c (ft_sdf_render): Set the `flags' field
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of `FT_Raster_Params' to `FT_RASTER_FLAG_SDF'.
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2020-06-26 Anuj Verma <anujv@iitbhilai.ac.in>
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* src/sdf/ftsdf.c (sdf_shape_dump): Use `FT_TRACEX'
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instead of `printf'.
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2020-06-26 Anuj Verma <anujv@iitbhilai.ac.in>
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* src/sdf/ftsdf.c (sdf_shape_dump): Added function to
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dump the `SDF_Shape' on the console for debugging.
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2020-06-26 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added functions to de-allocate `SDF_' structs.
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* src/sdf/ftsdf.c (SDF_Contour, SDF_Shape): Use `FT_ListRec'
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instead of `FT_List' to avoid a few extra allocations.
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* src/sdf/ftsdf.c (SDF_Edge, SDF_Contour, SDF_Shape): Added
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functions to de-allocate these structs and their members.
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* src/sdf/ftsdfrenc.c: Typo.
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2020-06-25 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Decompose outline and store it in a temporary
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`SDF_Shape' object for easy iteration and pre-computing
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some variables.
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* src/sdf/ftsdf.c (sdf_outline_decompose): Added function
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to decompost outline and store it in a `SDF_Shape' object.
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This allows us to pre-compute some variable.
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2020-06-25 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added essential enums and structs required.
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* src/freetype/internal/fttrace.h: Remove tabs.
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* src/sdf/ftsdfrend.c (ft_sdf_render): Calculate padding
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using the `spread'.
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* src/sdf/ftsdf.c (SDF_Edge_Type, SDF_Edge, SDF_Contour,
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SDF_Shape): Added structures and their initializer
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functions.
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2020-06-23 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added functionality to set and get module properties.
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Also added a `spread' property.
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* src/freetype/internal/fttrace.h: Added sdf module trace
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define.
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* src/sdf/ftsdf.c (sdf_TRaster => SDF_TRaster): Use capital
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character for structs.
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* src/sdf/ftsdfrend.h (SDF_Renderer_Module): Added a struct
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which extends the `FT_RendererRec' and added the `spread'
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property.
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* src/sdf/ftsdfrend.c: Synchronized the code to use the new
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`SDF_Renderer_Module' and added functions to get/set the
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properties.
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2020-06-20 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Implemented a few functions required by a renderer
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module.
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* src/sdf/ftsdf.c (sdf_TRaster_): Added new structure to hold
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the memory allocator `FT_Memory'.
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* src/sdf/ftsdf.c (ft_sdf_raster): Implemented a few essential
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functions required by `FT_Raster'.
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* src/sdf/ftsdfrend.c (ft_sdf_renderer_class): Implemented a few
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essential functions required by `FT_Renderer'.
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* src/sdf/ftsdfrend.c (ft_sdf_render): Added functionality to
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compute shift and padding before rendering the outline.
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2020-06-19 Anuj Verma <anujv@iitbhilai.ac.in>
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* include/freetype/ftimage.h (FT_Render_Mode_): Added new
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pixel mode `FT_PIXEL_MODE_GRAY16' which will be used
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to represent signed values while rendering to SDF bitmap.
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2020-06-19 Anuj Verma <anujv@iitbhilai.ac.in>
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* include/freetype/freetype.h (FT_Render_Mode_): Added new
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rendermode `FT_RENDER_MODE_SDF' which will be used by the
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`sdf' module to generate signed distance fields from glyph's
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outline.
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* src/sdf/ftsdfrend.h, src/sdf/module.mk, src/sdf/rules.mk:
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Add a new line at the end of files.
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2020-06-18 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added the structure of a new module to render
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signed distance fields.
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* src/sdf/sdf.c, src/sdf/ftsdfrend.c, src/sdf/ftsdf.c,
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src/sdf/ftsdfrend.h, src/sdf/ftsdf.h, src/sdf/ftsdferrs.h:
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Added files required by the `sdf' renderer module and added
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the basic structure and functions required.
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* src/sdf/rules.mk, src/sdf/module.mk: Added files required to
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build the `sdf' module using the default build system.
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* CMakeLists.txt (BASE_SRCS): Add `src/sdf/sdf.c' to the variable.
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* include/freetype/config/ftmodule.h: Added `sdf' module
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declaration so that the module can be compiled when not compiling
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with GNU make.
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* modules.cfg (RASTER_MODULES): Include `sdf' module to the default
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rasterizer module list.
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* include/freetype/ftmoderr.h: sdf module error define
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