60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
#ifndef TRIANGULATOR_STROKER_H_
|
|
#define TRIANGULATOR_STROKER_H_
|
|
|
|
#include <Eina.h>
|
|
#include "efl/interfaces/efl_gfx_types.eot.h"
|
|
typedef Efl_Gfx_Path_Command_Type Efl_Gfx_Path_Command;
|
|
|
|
typedef struct _Triangulator_Stroker Triangulator_Stroker;
|
|
struct _Triangulator_Stroker
|
|
{
|
|
Eina_Inarray *vertices;
|
|
Eina_Inarray *arc_pts; // intermediate array for storing arc points
|
|
float cx, cy; // current points
|
|
float nvx, nvy; // normal vector
|
|
float width;
|
|
float miter_limit;
|
|
|
|
int roundness; // Number of line segments in a round join
|
|
float sin_theta; // sin(roundness / 360);
|
|
float cos_theta; // cos(roundness / 360);
|
|
float curvyness_mul;
|
|
float curvyness_add;
|
|
|
|
Efl_Gfx_Join join_style;
|
|
Efl_Gfx_Cap cap_style;
|
|
};
|
|
|
|
/**
|
|
* Creates a new triangulating stroker.
|
|
*
|
|
*/
|
|
Triangulator_Stroker *triangulator_stroker_new(void);
|
|
|
|
/**
|
|
* Frees the given Stroker and any associated resource.
|
|
*
|
|
* stroker The given Stroker.
|
|
*/
|
|
void triangulator_stroker_free(Triangulator_Stroker *stroker);
|
|
|
|
void triangulator_stroker_stroke_set(Triangulator_Stroker *stroker, float width,
|
|
Efl_Gfx_Cap cap_style, Efl_Gfx_Join join_style, Eina_Matrix3 *m);
|
|
|
|
/**
|
|
* Process the command list to generate triangle strips.
|
|
* The alogrithm handles multiple contour by adding invisible triangles.
|
|
*
|
|
* cmds : commnad list
|
|
* pts : point list.
|
|
* cmd_count : number of commands.
|
|
* pt_count : number of points.
|
|
*
|
|
* output : It generates the outline in the form of triangle strips store in vertices array.
|
|
* The array can be used to copy the data to a VBO and draw the data using TRIANGLE_STRIP.
|
|
*/
|
|
void triangulator_stroker_process(Triangulator_Stroker *stroker, const Efl_Gfx_Path_Command *cmds, const double *pts, int cmd_count, int pt_count);
|
|
|
|
#endif // TRIANGULATOR_STROKER_H_
|
|
|