[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.
This commit is contained in:
Anuj Verma 2020-08-17 16:11:56 +05:30 committed by Werner Lemberg
parent 56d27d32c4
commit c6ec87ec48
4 changed files with 77 additions and 0 deletions

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@ -1,3 +1,12 @@
2020-08-17 Anuj Verma <anujv@iitbhilai.ac.in>
[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.
2020-08-17 Anuj Verma <anujv@iitbhilai.ac.in>
[sdf] Add 'sdf' renderer.

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@ -2,6 +2,68 @@
#ifndef FTSDF_H_
#define FTSDF_H_
#include <ft2build.h>
#include FT_CONFIG_CONFIG_H
#include <freetype/ftimage.h>
/* common properties and function */
#include "ftsdfcommon.h"
FT_BEGIN_HEADER
/**************************************************************************
*
* @struct:
* SDF_Raster_Params
*
* @description:
* This struct must be passed to the raster render function
* @FT_Raster_RenderFunc instead of @FT_Raster_Params because the
* rasterizer requires some additional information to render properly.
*
* @fields:
* root ::
* The native raster parameters structure.
*
* spread ::
* This is an essential parameter/property required by the renderer.
* `spread` defines the maximum unsigned value that is present in the
* final SDF output. For the default value check file
* `ftsdfcommon.h`.
*
* flip_sign ::
* By default positive values indicate positions inside of contours,
* i.e., filled by a contour. If this property is true then that
* output will be the opposite of the default, i.e., negative values
* indicate positions inside of contours.
*
* flip_y ::
* Setting this parameter to true maked the output image flipped
* along the y-axis.
*
* overlaps ::
* Set this to true to generate SDF for glyphs having overlapping
* contours. The overlapping support is limited to glyphs that do not
* have self-intersecting contours. Also, removing overlaps require a
* considerable amount of extra memory; additionally, it will not work
* if generating SDF from bitmap.
*
* @note:
* All properties are valid for both the 'sdf' and 'bsdf' renderers; the
* exception is `overlaps`, which gets ignored by the 'bsdf' renderer.
*
*/
typedef struct SDF_Raster_Params_
{
FT_Raster_Params root;
FT_UInt spread;
FT_Bool flip_sign;
FT_Bool flip_y;
FT_Bool overlaps;
} SDF_Raster_Params;
FT_END_HEADER
#endif /* FTSDF_H_ */

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* @note:
* All properties except `overlaps` are valid for both the 'sdf' and
* 'bsdf' renderers.
*
*/
typedef struct SDF_Renderer_Module_
{

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#define FT_MAKE_OPTION_SINGLE_OBJECT
#include "ftsdfrend.c"
#include "ftbsdf.c"
#include "ftsdf.c"
/* END */