Finish path parsing

Make the path parser handle the complete SVG path
language. The code for elliptical arcs is taken from
librsvg. Make gsk_path_from_string public, and add
tests for it.
This commit is contained in:
Matthias Clasen
2020-11-23 20:38:15 -05:00
parent 5a3daa924d
commit 5f4850a4f4
4 changed files with 783 additions and 95 deletions

View File

@@ -1919,139 +1919,578 @@ gsk_path_builder_close (GskPathBuilder *builder)
gsk_path_builder_end_current (builder);
}
static const char *
skip_whitespace (const char *p)
static void
arc_segment (GskPathBuilder *builder,
double cx,
double cy,
double rx,
double ry,
double sin_phi,
double cos_phi,
double sin_th0,
double cos_th0,
double sin_th1,
double cos_th1,
double t)
{
while (g_ascii_isspace (*p))
p++;
return p;
double x1, y1, x2, y2, x3, y3;
x1 = rx * (cos_th0 - t * sin_th0);
y1 = ry * (sin_th0 + t * cos_th0);
x3 = rx * cos_th1;
y3 = ry * sin_th1;
x2 = x3 + rx * (t * sin_th1);
y2 = y3 + ry * (-t * cos_th1);
gsk_path_builder_curve_to (builder,
cx + cos_phi * x1 - sin_phi * y1,
cy + sin_phi * x1 + cos_phi * y1,
cx + cos_phi * x2 - sin_phi * y2,
cy + sin_phi * x2 + cos_phi * y2,
cx + cos_phi * x3 - sin_phi * y3,
cy + sin_phi * x3 + cos_phi * y3);
}
static void
parse_point (const char *p,
char **end,
double *x,
double *y)
gsk_path_builder_arc_to (GskPathBuilder *builder,
float rx,
float ry,
float x_axis_rotation,
gboolean large_arc,
gboolean positive_sweep,
float x,
float y)
{
graphene_point_t *current;
double x1, y1, x2, y2;
double phi, sin_phi, cos_phi;
double mid_x, mid_y;
double lambda;
double d;
double k;
double x1_, y1_;
double cx_, cy_;
double cx, cy;
double ux, uy, u_len;
double cos_theta1, theta1;
double vx, vy, v_len;
double dp_uv;
double cos_delta_theta, delta_theta;
int i, n_segs;
double d_theta, theta;
double sin_th0, cos_th0;
double sin_th1, cos_th1;
double th_half;
double t;
current = &g_array_index (builder->points, graphene_point_t, builder->points->len - 1);
x1 = current->x;
y1 = current->y;
x2 = x;
y2 = y;
phi = x_axis_rotation * M_PI / 180.0;
sincos (phi, &sin_phi, &cos_phi);
rx = fabs (rx);
ry = fabs (ry);
mid_x = (x1 - x2) / 2;
mid_y = (y1 - y2) / 2;
x1_ = cos_phi * mid_x + sin_phi * mid_y;
y1_ = - sin_phi * mid_x + cos_phi * mid_y;
lambda = (x1_ / rx) * (x1_ / rx) + (y1_ / ry) * (y1_ / ry);
if (lambda > 1)
{
lambda = sqrt (lambda);
rx *= lambda;
ry *= lambda;
}
d = (rx * y1_) * (rx * y1_) + (ry * x1_) * (ry * x1_);
if (d == 0)
return;
k = sqrt (fabs ((rx * ry) * (rx * ry) / d - 1.0));
if (positive_sweep == large_arc)
k = -k;
cx_ = k * rx * y1_ / ry;
cy_ = -k * ry * x1_ / rx;
cx = cos_phi * cx_ - sin_phi * cy_ + (x1 + x2) / 2;
cy = sin_phi * cx_ + cos_phi * cy_ + (y1 + y2) / 2;
ux = (x1_ - cx_) / rx;
uy = (y1_ - cy_) / ry;
u_len = sqrt (ux * ux + uy * uy);
if (u_len == 0)
return;
cos_theta1 = CLAMP (ux / u_len, -1, 1);
theta1 = acos (cos_theta1);
if (uy < 0)
theta1 = - theta1;
vx = (- x1_ - cx_) / rx;
vy = (- y1_ - cy_) / ry;
v_len = sqrt (vx * vx + vy * vy);
if (v_len == 0)
return;
dp_uv = ux * vx + uy * vy;
cos_delta_theta = CLAMP (dp_uv / (u_len * v_len), -1, 1);
delta_theta = acos (cos_delta_theta);
if (ux * vy - uy * vx < 0)
delta_theta = - delta_theta;
if (positive_sweep && delta_theta < 0)
delta_theta += 2 * M_PI;
else if (!positive_sweep && delta_theta > 0)
delta_theta -= 2 * M_PI;
n_segs = ceil (fabs (delta_theta / (M_PI_2 + 0.001)));
d_theta = delta_theta / n_segs;
theta = theta1;
sincos (theta1, &sin_th1, &cos_th1);
th_half = d_theta / 2;
t = (8.0 / 3.0) * sin (th_half / 2) * sin (th_half / 2) / sin (th_half);
for (i = 0; i < n_segs; i++)
{
theta = theta1;
theta1 = theta + d_theta;
sin_th0 = sin_th1;
cos_th0 = cos_th1;
sincos (theta1, &sin_th1, &cos_th1);
arc_segment (builder,
cx, cy, rx, ry,
sin_phi, cos_phi,
sin_th0, cos_th0,
sin_th1, cos_th1,
t);
}
}
static void
skip_whitespace (const char **p)
{
while (g_ascii_isspace (**p))
(*p)++;
}
static void
skip_optional_comma (const char **p)
{
skip_whitespace (p);
if (**p == ',')
(*p)++;
}
static gboolean
parse_number (const char **p,
double *c)
{
char *e;
*x = g_ascii_strtod (p, &e);
*y = g_ascii_strtod (e, end);
*c = g_ascii_strtod (*p, &e);
if (e == *p)
return FALSE;
*p = e;
skip_optional_comma (p);
return TRUE;
}
static gboolean
parse_coordinate (const char **p,
double *c)
{
return parse_number (p, c);
}
static gboolean
parse_coordinate_pair (const char **p,
double *x,
double *y)
{
double xx, yy;
const char *o = *p;
if (!parse_coordinate (p, &xx))
{
*p = o;
return FALSE;
}
if (!parse_coordinate (p, &yy))
{
*p = o;
return FALSE;
}
*x = xx;
*y = yy;
return TRUE;
}
static gboolean
parse_nonnegative_number (const char **p,
double *x)
{
const char *o = *p;
double n;
if (!parse_number (p, &n))
return FALSE;
if (n < 0)
{
*p = o;
return FALSE;
}
*x = n;
return TRUE;
}
static gboolean
parse_flag (const char **p,
gboolean *f)
{
skip_whitespace (p);
if (strchr ("01", **p))
{
*f = **p == '1';
(*p)++;
skip_optional_comma (p);
return TRUE;
}
return FALSE;
}
static gboolean
parse_command (const char **p,
char *cmd)
{
char *s;
const char *allowed;
if (*cmd == 'X')
allowed = "mM";
else
allowed = "mMhHvVzZlLcCsStTqQaA";
skip_whitespace (p);
s = strchr (allowed, **p);
if (s)
{
*cmd = *s;
(*p)++;
return TRUE;
}
return FALSE;
}
GskPath *
gsk_path_from_string (const char *s)
{
GskPathBuilder *builder;
double x0, y0, x1, y1, x2, y2;
double w, h, r;
double x, y;
double prev_x1, prev_y1;
const char *p;
char *end;
int i;
char cmd;
char prev_cmd;
gboolean after_comma;
gboolean repeat;
builder = gsk_path_builder_new ();
/* Commands that we produce:
* M x y h w v h h -w z (rectangle)
* M x y A r r 0 i i x1 y1 (circle)
* M x y (move)
* Z (close)
* L x y (line)
* C x0 y0, x1 y1, x2 y2 (curve)
*/
cmd = 'X';
x = y = 0;
prev_x1 = prev_y1 = 0;
after_comma = FALSE;
p = s;
while (p)
while (*p)
{
p = skip_whitespace (p);
if (*p == '\0')
break;
switch (*p)
prev_cmd = cmd;
repeat = !parse_command (&p, &cmd);
if (after_comma && !repeat)
goto error;
switch (cmd)
{
case 'M':
p++;
parse_point (p, &end, &x0, &y0);
p = skip_whitespace (end);
switch (*p)
{
case 'h':
p++;
w = g_ascii_strtod (p, &end);
p = skip_whitespace (end);
if (*p != 'v')
goto error;
p++;
h = g_ascii_strtod (p, &end);
p = skip_whitespace (end);
if (*p != 'h')
goto error;
p++;
g_ascii_strtod (p, &end);
p = skip_whitespace (end);
if (*p != 'z')
goto error;
p++;
gsk_path_builder_add_rect (builder, x0, y0, w, h);
break;
case 'A':
p++;
parse_point (p, &end, &r, &r);
p = skip_whitespace (end);
/* FIXME reconstruct partial circles */
for (i = 0; i < 5; i++)
{
g_ascii_strtod (p, &end);
p = skip_whitespace (end);
}
gsk_path_builder_add_circle (builder, &GRAPHENE_POINT_INIT (x0 - r, y0), r);
break;
default:
gsk_path_builder_move_to (builder, x0, y0);
break;
}
break;
case 'X':
goto error;
case 'Z':
p++;
gsk_path_builder_close (builder);
case 'z':
if (repeat)
goto error;
else
gsk_path_builder_close (builder);
break;
case 'M':
case 'm':
{
double x1, y1;
if (parse_coordinate_pair (&p, &x1, &y1))
{
if (cmd == 'm')
{
x1 += x;
y1 += y;
}
if (repeat)
gsk_path_builder_line_to (builder, x1, y1);
else
gsk_path_builder_move_to (builder, x1, y1);
x = x1;
y = y1;
}
else
goto error;
}
break;
case 'L':
p++;
parse_point (p, &end, &x0, &y0);
p = skip_whitespace (end);
case 'l':
{
double x1, y1;
gsk_path_builder_line_to (builder, x0, y0);
if (parse_coordinate_pair (&p, &x1, &y1))
{
if (cmd == 'l')
{
x1 += x;
y1 += y;
}
gsk_path_builder_line_to (builder, x1, y1);
x = x1;
y = y1;
}
else
goto error;
}
break;
case 'H':
case 'h':
{
double x1;
if (parse_coordinate (&p, &x1))
{
if (cmd == 'h')
x1 += x;
gsk_path_builder_line_to (builder, x1, y);
x = x1;
}
else
goto error;
}
break;
case 'V':
case 'v':
{
double y1;
if (parse_coordinate (&p, &y1))
{
if (cmd == 'v')
y1 += y;
gsk_path_builder_line_to (builder, x, y1);
y = y1;
}
else
goto error;
}
break;
case 'C':
p++;
parse_point (p, &end, &x0, &y0);
p = skip_whitespace (end);
if (*p == ',')
p++;
parse_point (p, &end, &x1, &y1);
p = skip_whitespace (end);
if (*p == ',')
p++;
parse_point (p, &end, &x2, &y2);
p = skip_whitespace (end);
case 'c':
{
double x0, y0, x1, y1, x2, y2;
gsk_path_builder_curve_to (builder, x0, y0, x1, y1, x2, y2);
if (parse_coordinate_pair (&p, &x0, &y0) &&
parse_coordinate_pair (&p, &x1, &y1) &&
parse_coordinate_pair (&p, &x2, &y2))
{
if (cmd == 'c')
{
x0 += x;
y0 += y;
x1 += x;
y1 += y;
x2 += x;
y2 += y;
}
gsk_path_builder_curve_to (builder, x0, y0, x1, y1, x2, y2);
prev_x1 = x1;
prev_y1 = y1;
x = x2;
y = y2;
}
else
goto error;
}
break;
case 'S':
case 's':
{
double x0, y0, x1, y1, x2, y2;
if (parse_coordinate_pair (&p, &x1, &y1) &&
parse_coordinate_pair (&p, &x2, &y2))
{
if (cmd == 's')
{
x1 += x;
y1 += y;
x2 += x;
y2 += y;
}
if (strchr ("CcSs", prev_cmd))
{
x0 = 2 * x - prev_x1;
y0 = 2 * y - prev_y1;
}
else
{
x0 = x;
y0 = y;
}
gsk_path_builder_curve_to (builder, x0, y0, x1, y1, x2, y2);
prev_x1 = x1;
prev_y1 = y1;
x = x2;
y = y2;
}
else
goto error;
}
break;
case 'Q':
case 'q':
{
double x1, y1, x2, y2, xx1, yy1, xx2, yy2;
if (parse_coordinate_pair (&p, &x1, &y1) &&
parse_coordinate_pair (&p, &x2, &y2))
{
if (cmd == 'q')
{
x1 += x;
y1 += y;
x2 += x;
y2 += y;
}
xx1 = (x + 2.0 * x1) / 3.0;
yy1 = (y + 2.0 * y1) / 3.0;
xx2 = (x2 + 2.0 * x1) / 3.0;
yy2 = (y2 + 2.0 * y1) / 3.0;
gsk_path_builder_curve_to (builder, xx1, yy1, xx2, yy2, x2, y2);
prev_x1 = x1;
prev_y1 = y1;
x = x2;
y = y2;
}
else
goto error;
}
break;
case 'T':
case 't':
{
double x1, y1, x2, y2, xx1, yy1, xx2, yy2;
if (parse_coordinate_pair (&p, &x2, &y2))
{
if (cmd == 't')
{
x2 += x;
y2 += y;
}
if (strchr ("QqTt", prev_cmd))
{
x1 = 2 * x - prev_x1;
y1 = 2 * y - prev_y1;
}
else
{
x1 = x;
y1 = y;
}
xx1 = (x + 2.0 * x1) / 3.0;
yy1 = (y + 2.0 * y1) / 3.0;
xx2 = (x2 + 2.0 * x1) / 3.0;
yy2 = (y2 + 2.0 * y1) / 3.0;
gsk_path_builder_curve_to (builder, xx1, yy1, xx2, yy2, x2, y2);
prev_x1 = x1;
prev_y1 = y1;
x = x2;
y = y2;
}
else
goto error;
}
break;
case 'A':
case 'a':
{
double rx, ry;
double x_axis_rotation;
int large_arc, sweep;
double x1, y1;
if (parse_nonnegative_number (&p, &rx) &&
parse_nonnegative_number (&p, &ry) &&
parse_number (&p, &x_axis_rotation) &&
parse_flag (&p, &large_arc) &&
parse_flag (&p, &sweep) &&
parse_coordinate_pair (&p, &x1, &y1))
{
if (cmd == 'a')
{
x1 += x;
y1 += y;
}
gsk_path_builder_arc_to (builder,
rx, ry, x_axis_rotation,
large_arc, sweep,
x1, y1);
x = x1;
y = y1;
}
else
goto error;
}
break;
default:
goto error;
}
after_comma = (p > s) && p[-1] == ',';
}
if (after_comma)
goto error;
return gsk_path_builder_free_to_path (builder);
error:
g_warning ("Can't parse string as GskPath, error at %ld", p - s);
//g_warning ("Can't parse string '%s' as GskPath, error at %ld", s, p - s);
gsk_path_builder_unref (builder);
return NULL;

View File

@@ -84,6 +84,10 @@ gboolean gsk_path_foreach (GskPath
GskPathForeachFunc func,
gpointer user_data);
GDK_AVAILABLE_IN_ALL
GskPath * gsk_path_from_string (const char *string);
#define GSK_TYPE_PATH_BUILDER (gsk_path_builder_get_type ())
typedef struct _GskPathBuilder GskPathBuilder;

View File

@@ -58,7 +58,6 @@ void gsk_path_builder_add_contour_segment (GskPathBuilder
float start,
float end);
GskPath * gsk_path_from_string (const char *string);
G_END_DECLS

View File

@@ -117,6 +117,251 @@ test_create (void)
}
}
/* testcases from path_parser.rs in librsvg */
static void
test_from_string (void)
{
struct {
const char *in;
const char *out;
} tests[] = {
{ "", "" },
// numbers
{ "M 10 20", "M 10 20" },
{ "M -10 -20", "M -10 -20" },
{ "M .10 0.20", "M 0.1 0.2" },
{ "M -.10 -0.20", "M -0.1 -0.2" },
{ "M-.10-0.20", "M -0.1 -0.2" },
{ "M10.5.50", "M 10.5 0.5" },
{ "M.10.20", "M 0.1 0.2" },
{ "M .10E1 .20e-4", "M 1 2e-05" },
{ "M-.10E1-.20", "M -1 -0.2" },
{ "M10.10E2 -0.20e3", "M 1010 -200" },
{ "M-10.10E2-0.20e-3", "M -1010 -0.0002" },
{ "M1e2.5", "M 100 0.5" },
{ "M1e-2.5", "M 0.01 0.5" },
{ "M1e+2.5", "M 100 0.5" },
// bogus numbers
{ "M+", NULL },
{ "M-", NULL },
{ "M+x", NULL },
{ "M10e", NULL },
{ "M10ex", NULL },
{ "M10e-", NULL },
{ "M10e+x", NULL },
// numbers with comma
{ "M 10, 20", "M 10 20" },
{ "M -10,-20", "M -10 -20" },
{ "M.10 , 0.20", "M 0.1 0.2" },
{ "M -.10, -0.20 ", "M -0.1 -0.2" },
{ "M-.10-0.20", "M -0.1 -0.2" },
{ "M.10.20", "M 0.1 0.2" },
{ "M .10E1,.20e-4", "M 1 2e-05" },
{ "M-.10E-2,-.20", "M -0.001 -0.2" },
{ "M10.10E2,-0.20e3", "M 1010 -200" },
{ "M-10.10E2,-0.20e-3", "M -1010 -0.0002" },
// single moveto
{ "M 10 20 ", "M 10 20" },
{ "M10,20 ", "M 10 20" },
{ "M10 20 ", "M 10 20" },
{ " M10,20 ", "M 10 20" },
// relative moveto
{ "m10 20", "M 10 20" },
// absolute moveto with implicit lineto
{ "M10 20 30 40", "M 10 20 L 30 40" },
{ "M10,20,30,40", "M 10 20 L 30 40" },
{ "M.1-2,3E2-4", "M 0.1 -2 L 300 -4" },
// relative moveto with implicit lineto
{ "m10 20 30 40", "M 10 20 L 40 60" },
// relative moveto with relative lineto sequence
{ "m 46,447 l 0,0.5 -1,0 -1,0 0,1 0,12",
"M 46 447 L 46 447.5 L 45 447.5 L 44 447.5 L 44 448.5 L 44 460.5" },
// absolute moveto with implicit linetos
{ "M10,20 30,40,50 60", "M 10 20 L 30 40 L 50 60" },
// relative moveto with implicit linetos
{ "m10 20 30 40 50 60", "M 10 20 L 40 60 L 90 120" },
// absolute moveto moveto
{ "M10 20 M 30 40", "M 10 20 M 30 40" },
// relative moveto moveto
{ "m10 20 m 30 40", "M 10 20 M 40 60" },
// relative moveto lineto moveto
{ "m10 20 30 40 m 50 60", "M 10 20 L 40 60 M 90 120" },
// absolute moveto lineto
{ "M10 20 L30,40", "M 10 20 L 30 40" },
// relative moveto lineto
{ "m10 20 l30,40", "M 10 20 L 40 60" },
// relative moveto lineto lineto abs lineto
{ "m10 20 30 40l30,40,50 60L200,300",
"M 10 20 L 40 60 L 70 100 L 120 160 L 200 300" },
// horizontal lineto
{ "M10 20 H30", "M 10 20 L 30 20" },
{ "M 10 20 H 30 40", "M 10 20 L 30 20 L 40 20" },
{ "M10 20 H30,40-50", "M 10 20 L 30 20 L 40 20 L -50 20" },
{ "m10 20 h30,40-50", "M 10 20 L 40 20 L 80 20 L 30 20" },
// vertical lineto
{ "M10 20 V30", "M 10 20 L 10 30" },
{ "M10 20 V30 40", "M 10 20 L 10 30 L 10 40" },
{ "M10 20 V30,40-50", "M 10 20 L 10 30 L 10 40 L 10 -50" },
{ "m10 20 v30,40-50", "M 10 20 L 10 50 L 10 90 L 10 40" },
// curveto
{ "M10 20 C 30,40 50 60-70,80", "M 10 20 C 30 40, 50 60, -70 80" },
{ "M10 20 C 30,40 50 60-70,80,90 100,110 120,130,140",
"M 10 20 C 30 40, 50 60, -70 80 C 90 100, 110 120, 130 140" },
{ "m10 20 c 30,40 50 60-70,80,90 100,110 120,130,140",
"M 10 20 C 40 60, 60 80, -60 100 C 30 200, 50 220, 70 240" },
{ "m10 20 c 30,40 50 60-70,80 90 100,110 120,130,140",
"M 10 20 C 40 60, 60 80, -60 100 C 30 200, 50 220, 70 240" },
// smooth curveto
{ "M10 20 S 30,40-50,60", "M 10 20 C 10 20, 30 40, -50 60" },
{ "M10 20 S 30,40 50 60-70,80,90 100",
"M 10 20 C 10 20, 30 40, 50 60 C 70 80, -70 80, 90 100" },
// quadratic curveto
{ "M10 20 Q30 40 50 60", "M 10 20 C 23.3333 33.3333, 36.6667 46.6667, 50 60" },
{ "M10 20 Q30 40 50 60,70,80-90 100",
"M 10 20 C 23.3333 33.3333, 36.6667 46.6667, 50 60 C 63.3333 73.3333, 16.6667 86.6667, -90 100" },
{ "m10 20 q 30,40 50 60-70,80 90 100",
"M 10 20 C 30 46.6667, 46.6667 66.6667, 60 80 C 13.3333 133.333, 43.3333 166.667, 150 180" },
// smooth quadratic curveto
{ "M10 20 T30 40", "M 10 20 C 10 20, 16.6667 26.6667, 30 40" },
{ "M10 20 Q30 40 50 60 T70 80",
"M 10 20 C 23.3333 33.3333, 36.6667 46.6667, 50 60 C 63.3333 73.3333, 70 80, 70 80" },
{ "m10 20 q 30,40 50 60t-70,80",
"M 10 20 C 30 46.6667, 46.6667 66.6667, 60 80 C 73.3333 93.3333, 50 120, -10 160" },
// elliptical arc. Exact numbers depend on too much math, so just verify
// that these parse successfully
{ "M 1 3 A 1 2 3 00 6 7", "path" },
{ "M 1 2 A 1 2 3 016 7", "path" },
{ "M 1 2 A 1 2 3 10,6 7", "path" },
{ "M 1 2 A 1 2 3 1,1 6 7", "path" },
{ "M 1 2 A 1 2 3 1 1 6 7", "path" },
{ "M 1 2 A 1 2 3 1 16 7", "path" },
// close path
{ "M10 20 Z", "M 10 20 Z" },
{ "m10 20 30 40 m 50 60 70 80 90 100z", "M 10 20 L 40 60 M 90 120 L 160 200 L 250 300 Z" },
// must start with moveto
{ " L10 20", NULL },
// moveto args
{ "M", NULL },
{ "M,", NULL },
{ "M10", NULL },
{ "M10,", NULL },
{ "M10x", NULL },
{ "M10,x", NULL },
{ "M10-20,", NULL },
{ "M10-20-30", NULL },
{ "M10-20-30 x", NULL },
// closepath args
{ "M10-20z10", NULL },
{ "M10-20z,", NULL },
// lineto args
{ "M10-20L10", NULL },
{ "M 10,10 L 20,20,30", NULL },
{ "M 10,10 L 20,20,", NULL },
// horizontal lineto args
{ "M10-20H", NULL },
{ "M10-20H,", NULL },
{ "M10-20H30,", NULL },
// vertical lineto args
{ "M10-20v", NULL },
{ "M10-20v,", NULL },
{ "M10-20v30,", NULL },
// curveto args
{ "M10-20C1", NULL },
{ "M10-20C1,", NULL },
{ "M10-20C1 2", NULL },
{ "M10-20C1,2,", NULL },
{ "M10-20C1 2 3", NULL },
{ "M10-20C1,2,3", NULL },
{ "M10-20C1,2,3,", NULL },
{ "M10-20C1 2 3 4", NULL },
{ "M10-20C1,2,3,4", NULL },
{ "M10-20C1,2,3,4,", NULL },
{ "M10-20C1 2 3 4 5", NULL },
{ "M10-20C1,2,3,4,5", NULL },
{ "M10-20C1,2,3,4,5,", NULL },
{ "M10-20C1,2,3,4,5,6,", NULL },
// smooth curveto args
{ "M10-20S1", NULL },
{ "M10-20S1,", NULL },
{ "M10-20S1 2", NULL },
{ "M10-20S1,2,", NULL },
{ "M10-20S1 2 3", NULL },
{ "M10-20S1,2,3,", NULL },
{ "M10-20S1,2,3,4,", NULL },
// quadratic curveto args
{ "M10-20Q1", NULL },
{ "M10-20Q1,", NULL },
{ "M10-20Q1 2", NULL },
{ "M10-20Q1,2,", NULL },
{ "M10-20Q1 2 3", NULL },
{ "M10-20Q1,2,3", NULL },
{ "M10-20Q1,2,3,", NULL },
{ "M10 20 Q30 40 50 60,", NULL },
// smooth quadratic curveto args
{ "M10-20T1", NULL },
{ "M10-20T1,", NULL },
{ "M10 20 T 30 40,", NULL },
// elliptical arc args
{ "M10-20A1", NULL },
{ "M10-20A1,", NULL },
{ "M10-20A1 2", NULL },
{ "M10-20A1 2,", NULL },
{ "M10-20A1 2 3", NULL },
{ "M10-20A1 2 3,", NULL },
{ "M10-20A1 2 3 4", NULL },
{ "M10-20A1 2 3 1", NULL },
{ "M10-20A1 2 3,1,", NULL },
{ "M10-20A1 2 3 1 5", NULL },
{ "M10-20A1 2 3 1 1", NULL },
{ "M10-20A1 2 3,1,1,", NULL },
{ "M10-20A1 2 3 1 1 6", NULL },
{ "M10-20A1 2 3,1,1,6,", NULL },
{ "M 1 2 A 1 2 3 1.0 0.0 6 7", NULL },
{ "M10-20A1 2 3,1,1,6,7,", NULL },
// misc
{ "M.. 1,0 0,100000", NULL },
{ "M 10 20,M 10 20", NULL },
{ "M 10 20, M 10 20", NULL },
{ "M 10 20, M 10 20", NULL },
{ "M 10 20, ", NULL },
};
int i;
for (i = 0; i < G_N_ELEMENTS (tests); i++)
{
GskPath *path;
char *string;
char *string2;
if (g_test_verbose ())
g_print ("%d: %s\n", i, tests[i].in);
path = gsk_path_from_string (tests[i].in);
if (tests[i].out)
{
g_assert_nonnull (path);
string = gsk_path_to_string (path);
gsk_path_unref (path);
if (strcmp (tests[i].out, "path") != 0)
g_assert_cmpstr (tests[i].out, ==, string);
path = gsk_path_from_string (string);
g_assert_nonnull (path);
string2 = gsk_path_to_string (path);
gsk_path_unref (path);
g_assert_cmpstr (string, ==, string2);
g_free (string);
g_free (string2);
}
else
g_assert_null (path);
}
}
int
main (int argc,
char *argv[])
@@ -124,6 +369,7 @@ main (int argc,
gtk_test_init (&argc, &argv, NULL);
g_test_add_func ("/path/create", test_create);
g_test_add_func ("/path/from-string", test_from_string);
return g_test_run ();
}