#include "cairoint.h"
#include "cairo-path-private.h"
#include "cairo-path-fixed-private.h"
static const cairo_path_t _cairo_path_nil = { CAIRO_STATUS_NO_MEMORY, NULL, 0 };
typedef struct cairo_path_count {
int count;
cairo_point_t current_point;
} cpc_t;
static cairo_status_t
_cpc_move_to (void *closure, cairo_point_t *point)
{
cpc_t *cpc = closure;
cpc->count += 2;
cpc->current_point = *point;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cpc_line_to (void *closure, cairo_point_t *point)
{
cpc_t *cpc = closure;
cpc->count += 2;
cpc->current_point = *point;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cpc_curve_to (void *closure,
cairo_point_t *p1,
cairo_point_t *p2,
cairo_point_t *p3)
{
cpc_t *cpc = closure;
cpc->count += 4;
cpc->current_point = *p3;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cpc_close_path (void *closure)
{
cpc_t *cpc = closure;
cpc->count += 1;
return CAIRO_STATUS_SUCCESS;
}
static int
_cairo_path_count (cairo_path_t *path,
cairo_path_fixed_t *path_fixed,
double tolerance,
cairo_bool_t flatten)
{
cairo_status_t status;
cpc_t cpc;
cpc.count = 0;
cpc.current_point.x = 0;
cpc.current_point.y = 0;
if (flatten) {
status = _cairo_path_fixed_interpret_flat (path_fixed,
CAIRO_DIRECTION_FORWARD,
_cpc_move_to,
_cpc_line_to,
_cpc_close_path,
&cpc,
tolerance);
} else {
status = _cairo_path_fixed_interpret (path_fixed,
CAIRO_DIRECTION_FORWARD,
_cpc_move_to,
_cpc_line_to,
_cpc_curve_to,
_cpc_close_path,
&cpc);
}
if (status)
return -1;
return cpc.count;
}
typedef struct cairo_path_populate {
cairo_path_data_t *data;
cairo_gstate_t *gstate;
cairo_point_t current_point;
} cpp_t;
static cairo_status_t
_cpp_move_to (void *closure, cairo_point_t *point)
{
cpp_t *cpp = closure;
cairo_path_data_t *data = cpp->data;
double x, y;
x = _cairo_fixed_to_double (point->x);
y = _cairo_fixed_to_double (point->y);
_cairo_gstate_backend_to_user (cpp->gstate, &x, &y);
data->header.type = CAIRO_PATH_MOVE_TO;
data->header.length = 2;
data[1].point.x = x;
data[1].point.y = y;
cpp->data += data->header.length;
cpp->current_point = *point;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cpp_line_to (void *closure, cairo_point_t *point)
{
cpp_t *cpp = closure;
cairo_path_data_t *data = cpp->data;
double x, y;
x = _cairo_fixed_to_double (point->x);
y = _cairo_fixed_to_double (point->y);
_cairo_gstate_backend_to_user (cpp->gstate, &x, &y);
data->header.type = CAIRO_PATH_LINE_TO;
data->header.length = 2;
data[1].point.x = x;
data[1].point.y = y;
cpp->data += data->header.length;
cpp->current_point = *point;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cpp_curve_to (void *closure,
cairo_point_t *p1,
cairo_point_t *p2,
cairo_point_t *p3)
{
cpp_t *cpp = closure;
cairo_path_data_t *data = cpp->data;
double x1, y1;
double x2, y2;
double x3, y3;
x1 = _cairo_fixed_to_double (p1->x);
y1 = _cairo_fixed_to_double (p1->y);
_cairo_gstate_backend_to_user (cpp->gstate, &x1, &y1);
x2 = _cairo_fixed_to_double (p2->x);
y2 = _cairo_fixed_to_double (p2->y);
_cairo_gstate_backend_to_user (cpp->gstate, &x2, &y2);
x3 = _cairo_fixed_to_double (p3->x);
y3 = _cairo_fixed_to_double (p3->y);
_cairo_gstate_backend_to_user (cpp->gstate, &x3, &y3);
data->header.type = CAIRO_PATH_CURVE_TO;
data->header.length = 4;
data[1].point.x = x1;
data[1].point.y = y1;
data[2].point.x = x2;
data[2].point.y = y2;
data[3].point.x = x3;
data[3].point.y = y3;
cpp->data += data->header.length;
cpp->current_point = *p3;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cpp_close_path (void *closure)
{
cpp_t *cpp = closure;
cairo_path_data_t *data = cpp->data;
data->header.type = CAIRO_PATH_CLOSE_PATH;
data->header.length = 1;
cpp->data += data->header.length;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_path_populate (cairo_path_t *path,
cairo_path_fixed_t *path_fixed,
cairo_gstate_t *gstate,
cairo_bool_t flatten)
{
cairo_status_t status;
cpp_t cpp;
cpp.data = path->data;
cpp.gstate = gstate;
cpp.current_point.x = 0;
cpp.current_point.y = 0;
if (flatten) {
double tolerance = _cairo_gstate_get_tolerance (gstate);
status = _cairo_path_fixed_interpret_flat (path_fixed,
CAIRO_DIRECTION_FORWARD,
_cpp_move_to,
_cpp_line_to,
_cpp_close_path,
&cpp,
tolerance);
} else {
status = _cairo_path_fixed_interpret (path_fixed,
CAIRO_DIRECTION_FORWARD,
_cpp_move_to,
_cpp_line_to,
_cpp_curve_to,
_cpp_close_path,
&cpp);
}
if (status)
return status;
assert (cpp.data - path->data == path->num_data);
return CAIRO_STATUS_SUCCESS;
}
cairo_path_t *
_cairo_path_create_in_error (cairo_status_t status)
{
cairo_path_t *path;
if (status == CAIRO_STATUS_NO_MEMORY)
return (cairo_path_t*) &_cairo_path_nil;
path = malloc (sizeof (cairo_path_t));
if (path == NULL) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_path_t*) &_cairo_path_nil;
}
path->num_data = 0;
path->data = NULL;
path->status = status;
return path;
}
static cairo_path_t *
_cairo_path_create_internal (cairo_path_fixed_t *path_fixed,
cairo_gstate_t *gstate,
cairo_bool_t flatten)
{
cairo_path_t *path;
path = malloc (sizeof (cairo_path_t));
if (path == NULL) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_path_t*) &_cairo_path_nil;
}
path->num_data = _cairo_path_count (path, path_fixed,
_cairo_gstate_get_tolerance (gstate),
flatten);
if (path->num_data < 0) {
free (path);
return (cairo_path_t*) &_cairo_path_nil;
}
if (path->num_data) {
path->data = _cairo_malloc_ab (path->num_data,
sizeof (cairo_path_data_t));
if (path->data == NULL) {
free (path);
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_path_t*) &_cairo_path_nil;
}
path->status = _cairo_path_populate (path, path_fixed,
gstate, flatten);
} else {
path->data = NULL;
path->status = CAIRO_STATUS_SUCCESS;
}
return path;
}
void
cairo_path_destroy (cairo_path_t *path)
{
if (path == NULL || path == &_cairo_path_nil)
return;
if (path->data)
free (path->data);
free (path);
}
cairo_path_t *
_cairo_path_create (cairo_path_fixed_t *path,
cairo_gstate_t *gstate)
{
return _cairo_path_create_internal (path, gstate, FALSE);
}
cairo_path_t *
_cairo_path_create_flat (cairo_path_fixed_t *path,
cairo_gstate_t *gstate)
{
return _cairo_path_create_internal (path, gstate, TRUE);
}
cairo_status_t
_cairo_path_append_to_context (const cairo_path_t *path,
cairo_t *cr)
{
int i;
cairo_path_data_t *p;
cairo_status_t status;
for (i=0; i < path->num_data; i += path->data[i].header.length) {
p = &path->data[i];
switch (p->header.type) {
case CAIRO_PATH_MOVE_TO:
if (p->header.length < 2)
return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
cairo_move_to (cr,
p[1].point.x, p[1].point.y);
break;
case CAIRO_PATH_LINE_TO:
if (p->header.length < 2)
return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
cairo_line_to (cr,
p[1].point.x, p[1].point.y);
break;
case CAIRO_PATH_CURVE_TO:
if (p->header.length < 4)
return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
cairo_curve_to (cr,
p[1].point.x, p[1].point.y,
p[2].point.x, p[2].point.y,
p[3].point.x, p[3].point.y);
break;
case CAIRO_PATH_CLOSE_PATH:
if (p->header.length < 1)
return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
cairo_close_path (cr);
break;
default:
return _cairo_error (CAIRO_STATUS_INVALID_PATH_DATA);
}
status = cairo_status (cr);
if (status)
return status;
}
return CAIRO_STATUS_SUCCESS;
}