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/*
* Copyright (C) 2016 Vabishchevich Nikolay <vabnick@gmail.com>
*
* This file is part of libass.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef LIBASS_OUTLINE_H
#define LIBASS_OUTLINE_H
#include <ft2build.h>
#include FT_OUTLINE_H
#include <stdbool.h>
#include <stdint.h>
#include "ass_utils.h"
typedef struct {
int32_t x, y;
} ASS_Vector;
typedef struct {
double x, y;
} ASS_DVector;
typedef struct {
int32_t x_min, y_min, x_max, y_max;
} ASS_Rect;
typedef struct {
double x_min, y_min, x_max, y_max;
} ASS_DRect;
static inline void rectangle_reset(ASS_Rect *rect)
{
rect->x_min = rect->y_min = INT32_MAX;
rect->x_max = rect->y_max = INT32_MIN;
}
static inline void rectangle_update(ASS_Rect *rect,
int32_t x_min, int32_t y_min, int32_t x_max, int32_t y_max)
{
rect->x_min = FFMIN(rect->x_min, x_min);
rect->y_min = FFMIN(rect->y_min, y_min);
rect->x_max = FFMAX(rect->x_max, x_max);
rect->y_max = FFMAX(rect->y_max, y_max);
}
/*
* Outline represented with array of points and array of segments.
* Segment here is spline of order 1 (line), 2 (quadratic) or 3 (cubic).
* Each segment owns number of points equal to its order in point array
* and uses first point owned by the next segment as last point.
* Last segment in each contour instead of the next segment point uses
* point owned by the first segment in that contour. Correspondingly
* total number of points is equal to the sum of spline orders of all segments.
*/
enum {
OUTLINE_LINE_SEGMENT = 1, // line segment
OUTLINE_QUADRATIC_SPLINE = 2, // quadratic spline
OUTLINE_CUBIC_SPLINE = 3, // cubic spline
OUTLINE_COUNT_MASK = 3, // spline order mask
OUTLINE_CONTOUR_END = 4 // last segment in contour flag
};
typedef struct {
size_t n_points, max_points;
size_t n_segments, max_segments;
ASS_Vector *points;
char *segments;
} ASS_Outline;
#define OUTLINE_MIN (-((int32_t) 1 << 28))
#define OUTLINE_MAX (((int32_t) 1 << 28) - 1)
bool outline_alloc(ASS_Outline *outline, size_t n_points, size_t n_segments);
bool outline_convert(ASS_Outline *outline, const FT_Outline *source);
bool outline_scale_pow2(ASS_Outline *outline, const ASS_Outline *source,
int scale_ord_x, int scale_ord_y);
bool outline_transform_2d(ASS_Outline *outline, const ASS_Outline *source,
const double m[2][3]);
bool outline_transform_3d(ASS_Outline *outline, const ASS_Outline *source,
const double m[3][3]);
void outline_free(ASS_Outline *outline);
bool outline_add_point(ASS_Outline *outline, ASS_Vector pt, char segment);
bool outline_add_segment(ASS_Outline *outline, char segment);
bool outline_close_contour(ASS_Outline *outline);
void outline_update_cbox(const ASS_Outline *outline, ASS_Rect *cbox);
bool outline_stroke(ASS_Outline *result, ASS_Outline *result1,
const ASS_Outline *path, int xbord, int ybord, int eps);
#endif /* LIBASS_OUTLINE_H */
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