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efl: add a parser for SVG data path that generate EFL Path.

This commit is contained in:
Cedric BAIL 2015-04-03 16:23:15 +02:00
parent 2067e85d68
commit dfd40467fc
2 changed files with 516 additions and 0 deletions
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514
src/lib/efl/interfaces/efl_graphics_utils.c
View File

@ -457,3 +457,517 @@ efl_graphics_path_append_circle(Efl_Graphics_Path_Command **commands, double **p
efl_graphics_path_append_arc_to(commands, points, x + radius, y, radius, radius, 0, EINA_FALSE, EINA_FALSE);
efl_graphics_path_append_arc_to(commands, points, x, y - radius, radius, radius, 0, EINA_FALSE, EINA_FALSE);
}
static void
_efl_graphics_path_append_horizontal_to(Efl_Graphics_Path_Command **commands, double **points,
double d, double current_x EINA_UNUSED, double current_y)
{
efl_graphics_path_append_line_to(commands, points, d, current_y);
}
static void
_efl_graphics_path_append_vertical_to(Efl_Graphics_Path_Command **commands, double **points,
double d, double current_x, double current_y EINA_UNUSED)
{
efl_graphics_path_append_line_to(commands, points, current_x, d);
}
static char *
_strcomma(const char *content)
{
while (*content && isspace(*content)) content++;
if (*content != ',') return NULL;
return (char*) content + 1;
}
static inline Eina_Bool
_next_isnumber(const char *content)
{
char *tmp = NULL;
(void) strtod(content, &tmp);
return content != tmp;
}
static Eina_Bool
_efl_graphics_path_parse_pair(const char *content, char **end, double *x, double *y)
{
/* "x,y" */
char *end1 = NULL;
char *end2 = NULL;
*x = strtod(content, &end1);
end1 = _strcomma(end1);
if (!end1) return EINA_FALSE;
*y = strtod(end1, &end2);
if (end1 == end2) return EINA_FALSE;
*end = end2;
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_pair_to(const char *content, char **end,
Efl_Graphics_Path_Command **commands, double **points,
double *current_x, double *current_y,
void (*func)(Efl_Graphics_Path_Command **commands, double **points, double x, double y),
Eina_Bool rel)
{
double x, y;
*end = (char*) content;
do
{
Eina_Bool r;
r = _efl_graphics_path_parse_pair(content, end, &x, &y);
if (!r) return EINA_FALSE;
if (rel)
{
x += *current_x;
y += *current_y;
}
func(commands, points, x, y);
content = *end;
*current_x = x;
*current_y = y;
}
while (_next_isnumber(content));
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_double_to(const char *content, char **end,
Efl_Graphics_Path_Command **commands, double **points,
double *current, double current_x, double current_y,
void (*func)(Efl_Graphics_Path_Command **commands, double **points, double d, double current_x, double current_y),
Eina_Bool rel)
{
double d;
Eina_Bool first = EINA_FALSE;
*end = (char*) content;
do
{
d = strtod(content, end);
if (content == *end)
return first;
first = EINA_TRUE;
if (rel)
{
d += *current;
}
func(commands, points, d, current_x, current_y);
content = *end;
*current = d;
}
while (1); // This is an optimisation as we have only one parameter.
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_six(const char *content, char **end,
double *x, double *y,
double *ctrl_x0, double *ctrl_y0,
double *ctrl_x1, double *ctrl_y1)
{
/* "x,y ctrl_x0,ctrl_y0 ctrl_x1,ctrl_y1" */
char *end1 = NULL;
char *end2 = NULL;
*x = strtod(content, &end1);
end1 = _strcomma(end1);
if (!end1) return EINA_FALSE;
*y = strtod(end1, &end2);
if (end1 == end2) return EINA_FALSE;
*ctrl_x0 = strtod(end2, &end2);
end2 = _strcomma(end2);
if (!end2) return EINA_FALSE;
*ctrl_y0 = strtod(end2, &end1);
if (end1 == end2) return EINA_FALSE;
*ctrl_x1 = strtod(end1, &end2);
end2 = _strcomma(end2);
if (!end2) return EINA_FALSE;
*ctrl_y1 = strtod(end2, &end1);
if (end1 == end2) return EINA_FALSE;
*end = end1;
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_six_to(const char *content, char **end,
Efl_Graphics_Path_Command **commands, double **points,
double *current_x, double *current_y,
void (*func)(Efl_Graphics_Path_Command **commands, double **points, double x, double y, double ctrl_x0, double ctrl_y0, double ctrl_x1, double ctrl_y1),
Eina_Bool rel)
{
double x, y, ctrl_x0, ctrl_y0, ctrl_x1, ctrl_y1;
*end = (char*) content;
do
{
Eina_Bool r;
r = _efl_graphics_path_parse_six(content, end,
&x, &y,
&ctrl_x0, &ctrl_y0,
&ctrl_x1, &ctrl_y1);
if (!r) return EINA_FALSE;
if (rel)
{
x += *current_x;
y += *current_y;
}
func(commands, points, x, y, ctrl_x0, ctrl_y0, ctrl_x1, ctrl_y1);
content = *end;
*current_x = x;
*current_y = y;
}
while (_next_isnumber(content));
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_quad(const char *content, char **end,
double *x, double *y,
double *ctrl_x0, double *ctrl_y0)
{
/* "x,y ctrl_x0,ctrl_y0" */
char *end1 = NULL;
char *end2 = NULL;
*x = strtod(content, &end1);
end1 = _strcomma(end1);
if (!end1) return EINA_FALSE;
*y = strtod(end1, &end2);
if (end1 == end2) return EINA_FALSE;
*ctrl_x0 = strtod(end2, &end1);
end1 = _strcomma(end2);
if (!end1) return EINA_FALSE;
*ctrl_y0 = strtod(end1, &end2);
if (end1 == end2) return EINA_FALSE;
*end = end2;
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_quad_to(const char *content, char **end,
Efl_Graphics_Path_Command **commands, double **points,
double *current_x, double *current_y,
void (*func)(Efl_Graphics_Path_Command **commands, double **points,
double x, double y, double ctrl_x0, double ctrl_y0),
Eina_Bool rel)
{
double x, y, ctrl_x0, ctrl_y0;
*end = (char*) content;
do
{
Eina_Bool r;
r = _efl_graphics_path_parse_quad(content, end,
&x, &y,
&ctrl_x0, &ctrl_y0);
if (!r) return EINA_FALSE;
if (rel)
{
x += *current_x;
y += *current_y;
}
func(commands, points, x, y, ctrl_x0, ctrl_y0);
content = *end;
*current_x = x;
*current_y = y;
}
while (_next_isnumber(content));
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_arc(const char *content, char **end,
double *x, double *y,
double *rx, double *ry,
double *radius,
Eina_Bool *large_arc, Eina_Bool *sweep)
{
/* "rx,ry r large-arc-flag,sweep-flag x,y" */
char *end1 = NULL;
char *end2 = NULL;
*rx = strtod(content, &end1);
end1 = _strcomma(end1);
if (!end1) return EINA_FALSE;
*ry = strtod(end1, &end2);
if (end1 == end2) return EINA_FALSE;
*radius = strtod(end2, &end1);
if (end1 == end2) return EINA_FALSE;
*large_arc = strtol(end1, &end2, 10) ? EINA_TRUE : EINA_FALSE;
end1 = _strcomma(end2);
if (!end1) return EINA_FALSE;
*sweep = strtol(end1, &end2, 10) ? EINA_TRUE : EINA_FALSE;
if (end1 == end2) return EINA_FALSE;
*x = strtod(end2, &end1);
end1 = _strcomma(end2);
if (!end1) return EINA_FALSE;
*y = strtod(end1, &end2);
if (end1 == end2) return EINA_FALSE;
*end = end2;
return EINA_TRUE;
}
static Eina_Bool
_efl_graphics_path_parse_arc_to(const char *content, char **end,
Efl_Graphics_Path_Command **commands, double **points,
double *current_x, double *current_y,
void (*func)(Efl_Graphics_Path_Command **commands, double **points,
double x, double y, double rx, double ry, double angle,
Eina_Bool large_arc, Eina_Bool sweep),
Eina_Bool rel)
{
double x, y, rx, ry, angle;
Eina_Bool large_arc, sweep; // FIXME: handle those flag
*end = (char*) content;
do
{
Eina_Bool r;
r = _efl_graphics_path_parse_arc(content, end,
&x, &y,
&rx, &ry,
&angle,
&large_arc, &sweep);
if (!r) return EINA_FALSE;
if (rel)
{
x += *current_x;
y += *current_y;
}
func(commands, points, x, y, rx, ry, angle, large_arc, sweep);
content = *end;
*current_x = x;
*current_y = y;
}
while (_next_isnumber(content));
return EINA_TRUE;
}
EAPI Eina_Bool
efl_graphics_path_append_svg_path(Efl_Graphics_Path_Command **commands, double **points, const char *svg_path_data)
{
double current_x = 0, current_y = 0;
char *content = (char*) svg_path_data;
if (!content) return EINA_FALSE;
while (content[0] != '\0')
{
while (isspace(content[0])) content++;
switch (content[0])
{
case 'M':
if (!_efl_graphics_path_parse_pair_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_move_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 'm':
if (!_efl_graphics_path_parse_pair_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_move_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'z':
efl_graphics_path_append_close(commands, points);
content++;
break;
case 'L':
if (!_efl_graphics_path_parse_pair_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_line_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 'l':
if (!_efl_graphics_path_parse_pair_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_line_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'H':
if (!_efl_graphics_path_parse_double_to(&content[1],
&content,
commands, points,
&current_x, current_x, current_y,
_efl_graphics_path_append_horizontal_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 'h':
if (!_efl_graphics_path_parse_double_to(&content[1],
&content,
commands, points,
&current_x, current_x, current_y,
_efl_graphics_path_append_horizontal_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'V':
if (!_efl_graphics_path_parse_double_to(&content[1],
&content,
commands, points,
&current_y, current_x, current_y,
_efl_graphics_path_append_vertical_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 'v':
if (!_efl_graphics_path_parse_double_to(&content[1],
&content,
commands, points,
&current_y, current_x, current_y,
_efl_graphics_path_append_vertical_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'C':
if (!_efl_graphics_path_parse_six_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_cubic_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 'c':
if (!_efl_graphics_path_parse_six_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_cubic_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'S':
if (!_efl_graphics_path_parse_quad_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_scubic_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 's':
if (!_efl_graphics_path_parse_quad_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_scubic_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'Q':
if (!_efl_graphics_path_parse_quad_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_quadratic_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 'q':
if (!_efl_graphics_path_parse_quad_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_quadratic_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'T':
if (!_efl_graphics_path_parse_pair_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_squadratic_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 't':
if (!_efl_graphics_path_parse_pair_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_squadratic_to,
EINA_TRUE))
return EINA_FALSE;
break;
case 'A':
if (!_efl_graphics_path_parse_arc_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_arc_to,
EINA_FALSE))
return EINA_FALSE;
break;
case 'a':
if (!_efl_graphics_path_parse_arc_to(&content[1],
&content,
commands, points,
&current_x, &current_y,
efl_graphics_path_append_arc_to,
EINA_TRUE))
return EINA_FALSE;
break;
default:
return EINA_FALSE;
}
}
return EINA_TRUE;
}

2
src/lib/efl/interfaces/efl_graphics_utils.h
View File

@ -46,6 +46,8 @@ EAPI void
efl_graphics_path_append_circle(Efl_Graphics_Path_Command **commands, double **points,
double x, double y, double radius);
EAPI Eina_Bool
efl_graphics_path_append_svg_path(Efl_Graphics_Path_Command **commands, double **points, const char *svg_path_data);
EAPI void
efl_graphics_path_interpolate(const Efl_Graphics_Path_Command *cmd,