static GimpBezierDesc *
gimp_brush_transform_boundary_exact (GimpBrush *brush,
gdouble scale,
gdouble aspect_ratio,
gdouble angle,
gdouble hardness)
{
const GimpTempBuf *mask;
mask = gimp_brush_transform_mask (brush, NULL,
scale, aspect_ratio, angle, hardness);
if (mask)
{
GeglBuffer *buffer;
GimpBoundSeg *bound_segs;
gint n_bound_segs;
buffer = gimp_temp_buf_create_buffer ((GimpTempBuf *) mask);
bound_segs = gimp_boundary_find (buffer, NULL,
babl_format ("Y float"),
GIMP_BOUNDARY_WITHIN_BOUNDS,
0, 0,
gegl_buffer_get_width (buffer),
gegl_buffer_get_height (buffer),
0.0,
&n_bound_segs);
g_object_unref (buffer);
if (bound_segs)
{
GimpBoundSeg *stroke_segs;
gint n_stroke_groups;
stroke_segs = gimp_boundary_sort (bound_segs, n_bound_segs,
&n_stroke_groups);
g_free (bound_segs);
if (stroke_segs)
{
GimpBezierDesc *path;
path = gimp_bezier_desc_new_from_bound_segs (stroke_segs,
n_bound_segs,
n_stroke_groups);
g_free (stroke_segs);
return path;
}
}
}
return NULL;
}
gboolean
gimp_paint_core_stroke_boundary (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
gboolean emulate_dynamics,
const GimpBoundSeg *bound_segs,
gint n_bound_segs,
gint offset_x,
gint offset_y,
gboolean push_undo,
GError **error)
{
GimpBoundSeg *stroke_segs;
gint n_stroke_segs;
gint off_x;
gint off_y;
GimpCoords *coords;
gboolean initialized = FALSE;
gint n_coords;
gint seg;
gint s;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE);
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (bound_segs != NULL && n_bound_segs > 0, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
stroke_segs = gimp_boundary_sort (bound_segs, n_bound_segs,
&n_stroke_segs);
if (n_stroke_segs == 0)
return TRUE;
gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
off_x -= offset_x;
off_y -= offset_y;
coords = g_new0 (GimpCoords, n_bound_segs + 4);
seg = 0;
n_coords = 0;
/* we offset all coordinates by 0.5 to align the brush with the path */
coords[n_coords] = default_coords;
coords[n_coords].x = (gdouble) (stroke_segs[0].x1 - off_x + 0.5);
coords[n_coords].y = (gdouble) (stroke_segs[0].y1 - off_y + 0.5);
n_coords++;
for (s = 0; s < n_stroke_segs; s++)
{
while (stroke_segs[seg].x1 != -1 ||
stroke_segs[seg].x2 != -1 ||
stroke_segs[seg].y1 != -1 ||
stroke_segs[seg].y2 != -1)
{
coords[n_coords] = default_coords;
coords[n_coords].x = (gdouble) (stroke_segs[seg].x1 - off_x + 0.5);
coords[n_coords].y = (gdouble) (stroke_segs[seg].y1 - off_y + 0.5);
n_coords++;
seg++;
}
/* Close the stroke points up */
coords[n_coords] = coords[0];
n_coords++;
if (emulate_dynamics)
gimp_paint_core_stroke_emulate_dynamics (coords, n_coords);
if (initialized ||
gimp_paint_core_start (core, drawable, paint_options, &coords[0],
error))
{
gint i;
initialized = TRUE;
core->cur_coords = coords[0];
core->last_coords = coords[0];
gimp_paint_core_paint (core, drawable, paint_options,
GIMP_PAINT_STATE_INIT, 0);
gimp_paint_core_paint (core, drawable, paint_options,
GIMP_PAINT_STATE_MOTION, 0);
for (i = 1; i < n_coords; i++)
{
gimp_paint_core_interpolate (core, drawable, paint_options,
&coords[i], 0);
}
gimp_paint_core_paint (core, drawable, paint_options,
GIMP_PAINT_STATE_FINISH, 0);
}
else
{
break;
}
n_coords = 0;
seg++;
coords[n_coords] = default_coords;
coords[n_coords].x = (gdouble) (stroke_segs[seg].x1 - off_x + 0.5);
coords[n_coords].y = (gdouble) (stroke_segs[seg].y1 - off_y + 0.5);
n_coords++;
}
if (initialized)
{
gimp_paint_core_finish (core, drawable, push_undo);
gimp_paint_core_cleanup (core);
}
g_free (coords);
g_free (stroke_segs);
return initialized;
}
