gboolean
gimp_draw_tool_on_vectors_curve (GimpDrawTool *draw_tool,
GimpDisplay *display,
GimpVectors *vectors,
const GimpCoords *coord,
gint width,
gint height,
GimpCoords *ret_coords,
gdouble *ret_pos,
GimpAnchor **ret_segment_start,
GimpAnchor **ret_segment_end,
GimpStroke **ret_stroke)
{
GimpStroke *stroke = NULL;
GimpAnchor *segment_start;
GimpAnchor *segment_end;
GimpCoords min_coords = GIMP_COORDS_DEFAULT_VALUES;
GimpCoords cur_coords;
gdouble min_dist, cur_dist, cur_pos;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
g_return_val_if_fail (coord != NULL, FALSE);
if (ret_coords) *ret_coords = *coord;
if (ret_pos) *ret_pos = -1.0;
if (ret_segment_start) *ret_segment_start = NULL;
if (ret_segment_start) *ret_segment_end = NULL;
if (ret_stroke) *ret_stroke = NULL;
min_dist = -1.0;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
cur_dist = gimp_stroke_nearest_point_get (stroke, coord, 1.0,
&cur_coords,
&segment_start,
&segment_end,
&cur_pos);
if (cur_dist >= 0 && (min_dist < 0 || cur_dist < min_dist))
{
min_dist = cur_dist;
min_coords = cur_coords;
if (ret_coords) *ret_coords = cur_coords;
if (ret_pos) *ret_pos = cur_pos;
if (ret_segment_start) *ret_segment_start = segment_start;
if (ret_segment_end) *ret_segment_end = segment_end;
if (ret_stroke) *ret_stroke = stroke;
}
}
if (min_dist >= 0 &&
gimp_draw_tool_on_handle (draw_tool, display,
coord->x,
coord->y,
GIMP_HANDLE_CIRCLE,
min_coords.x,
min_coords.y,
width, height,
GIMP_HANDLE_ANCHOR_CENTER))
{
return TRUE;
}
return FALSE;
}
gboolean
gimp_image_snap_point (GimpImage *image,
gdouble x,
gdouble y,
gdouble *tx,
gdouble *ty,
gdouble epsilon_x,
gdouble epsilon_y,
gboolean snap_to_guides,
gboolean snap_to_grid,
gboolean snap_to_canvas,
gboolean snap_to_vectors)
{
gdouble mindist_x = G_MAXDOUBLE;
gdouble mindist_y = G_MAXDOUBLE;
gboolean snapped = FALSE;
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (tx != NULL, FALSE);
g_return_val_if_fail (ty != NULL, FALSE);
*tx = x;
*ty = y;
if (! gimp_image_get_guides (image)) snap_to_guides = FALSE;
if (! gimp_image_get_grid (image)) snap_to_grid = FALSE;
if (! gimp_image_get_active_vectors (image)) snap_to_vectors = FALSE;
if (! (snap_to_guides || snap_to_grid || snap_to_canvas || snap_to_vectors))
return FALSE;
if (x < -epsilon_x || x >= (gimp_image_get_width (image) + epsilon_x) ||
y < -epsilon_y || y >= (gimp_image_get_height (image) + epsilon_y))
{
return FALSE;
}
if (snap_to_guides)
{
GList *list;
for (list = gimp_image_get_guides (image); list; list = g_list_next (list))
{
GimpGuide *guide = list->data;
gint position = gimp_guide_get_position (guide);
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_HORIZONTAL:
snapped |= gimp_image_snap_distance (y, position,
epsilon_y,
&mindist_y, ty);
break;
case GIMP_ORIENTATION_VERTICAL:
snapped |= gimp_image_snap_distance (x, position,
epsilon_x,
&mindist_x, tx);
break;
default:
break;
}
}
}
if (snap_to_grid)
{
GimpGrid *grid = gimp_image_get_grid (image);
gdouble xspacing, yspacing;
gdouble xoffset, yoffset;
gdouble i;
gimp_grid_get_spacing (grid, &xspacing, &yspacing);
gimp_grid_get_offset (grid, &xoffset, &yoffset);
while (xoffset > xspacing)
xoffset -= xspacing;
while (yoffset > yspacing)
yoffset -= yspacing;
for (i = xoffset; i <= gimp_image_get_width (image); i += xspacing)
{
if (i < 0)
continue;
snapped |= gimp_image_snap_distance (x, i,
epsilon_x,
&mindist_x, tx);
}
for (i = yoffset; i <= gimp_image_get_height (image); i += yspacing)
{
if (i < 0)
continue;
snapped |= gimp_image_snap_distance (y, i,
epsilon_y,
&mindist_y, ty);
}
}
if (snap_to_canvas)
{
snapped |= gimp_image_snap_distance (x, 0,
epsilon_x,
&mindist_x, tx);
snapped |= gimp_image_snap_distance (x, gimp_image_get_width (image),
epsilon_x,
&mindist_x, tx);
snapped |= gimp_image_snap_distance (y, 0,
epsilon_y,
&mindist_y, ty);
snapped |= gimp_image_snap_distance (y, gimp_image_get_height (image),
epsilon_y,
&mindist_y, ty);
}
if (snap_to_vectors)
{
GimpVectors *vectors = gimp_image_get_active_vectors (image);
GimpStroke *stroke = NULL;
GimpCoords coords = { 0, 0, 0, 0, 0 };
coords.x = x;
coords.y = y;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
GimpCoords nearest;
if (gimp_stroke_nearest_point_get (stroke, &coords, 1.0,
&nearest,
NULL, NULL, NULL) >= 0)
{
snapped |= gimp_image_snap_distance (x, nearest.x,
epsilon_x,
&mindist_x, tx);
snapped |= gimp_image_snap_distance (y, nearest.y,
epsilon_y,
&mindist_y, ty);
}
}
}
return snapped;
}
gboolean
gimp_image_snap_rectangle (GimpImage *image,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gdouble *tx1,
gdouble *ty1,
gdouble epsilon_x,
gdouble epsilon_y,
gboolean snap_to_guides,
gboolean snap_to_grid,
gboolean snap_to_canvas,
gboolean snap_to_vectors)
{
gdouble nx, ny;
gdouble mindist_x = G_MAXDOUBLE;
gdouble mindist_y = G_MAXDOUBLE;
gdouble x_center = (x1 + x2) / 2.0;
gdouble y_center = (y1 + y2) / 2.0;
gboolean snapped = FALSE;
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (tx1 != NULL, FALSE);
g_return_val_if_fail (ty1 != NULL, FALSE);
*tx1 = x1;
*ty1 = y1;
if (! gimp_image_get_guides (image)) snap_to_guides = FALSE;
if (! gimp_image_get_grid (image)) snap_to_grid = FALSE;
if (! gimp_image_get_active_vectors (image)) snap_to_vectors = FALSE;
if (! (snap_to_guides || snap_to_grid || snap_to_canvas || snap_to_vectors))
return FALSE;
/* left edge */
if (gimp_image_snap_x (image, x1, &nx,
MIN (epsilon_x, mindist_x),
snap_to_guides,
snap_to_grid,
snap_to_canvas))
{
mindist_x = ABS (nx - x1);
*tx1 = nx;
snapped = TRUE;
}
/* right edge */
if (gimp_image_snap_x (image, x2, &nx,
MIN (epsilon_x, mindist_x),
snap_to_guides,
snap_to_grid,
snap_to_canvas))
{
mindist_x = ABS (nx - x2);
*tx1 = RINT (x1 + (nx - x2));
snapped = TRUE;
}
/* center, vertical */
if (gimp_image_snap_x (image, x_center, &nx,
MIN (epsilon_x, mindist_x),
snap_to_guides,
snap_to_grid,
snap_to_canvas))
{
mindist_x = ABS (nx - x_center);
*tx1 = RINT (x1 + (nx - x_center));
snapped = TRUE;
}
/* top edge */
if (gimp_image_snap_y (image, y1, &ny,
MIN (epsilon_y, mindist_y),
snap_to_guides,
snap_to_grid,
snap_to_canvas))
{
mindist_y = ABS (ny - y1);
*ty1 = ny;
snapped = TRUE;
}
/* bottom edge */
if (gimp_image_snap_y (image, y2, &ny,
MIN (epsilon_y, mindist_y),
snap_to_guides,
snap_to_grid,
snap_to_canvas))
{
mindist_y = ABS (ny - y2);
*ty1 = RINT (y1 + (ny - y2));
snapped = TRUE;
}
/* center, horizontal */
if (gimp_image_snap_y (image, y_center, &ny,
MIN (epsilon_y, mindist_y),
snap_to_guides,
snap_to_grid,
snap_to_canvas))
{
mindist_y = ABS (ny - y_center);
*ty1 = RINT (y1 + (ny - y_center));
snapped = TRUE;
}
if (snap_to_vectors)
{
GimpVectors *vectors = gimp_image_get_active_vectors (image);
GimpStroke *stroke = NULL;
GimpCoords coords1 = GIMP_COORDS_DEFAULT_VALUES;
GimpCoords coords2 = GIMP_COORDS_DEFAULT_VALUES;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
GimpCoords nearest;
gdouble dist;
/* top edge */
coords1.x = x1;
coords1.y = y1;
coords2.x = x2;
coords2.y = y1;
if (gimp_stroke_nearest_tangent_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
snapped |= gimp_image_snap_distance (y1, nearest.y,
epsilon_y,
&mindist_y, ty1);
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
snapped |= gimp_image_snap_distance (x1, nearest.x,
epsilon_x,
&mindist_x, tx1);
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords2, &coords1,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
dist = ABS (nearest.x - x2);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx1 = RINT (x1 + (nearest.x - x2));
snapped = TRUE;
}
}
/* bottom edge */
coords1.x = x1;
coords1.y = y2;
coords2.x = x2;
coords2.y = y2;
if (gimp_stroke_nearest_tangent_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
dist = ABS (nearest.y - y2);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty1 = RINT (y1 + (nearest.y - y2));
snapped = TRUE;
}
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
snapped |= gimp_image_snap_distance (x1, nearest.x,
epsilon_x,
&mindist_x, tx1);
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords2, &coords1,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
dist = ABS (nearest.x - x2);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx1 = RINT (x1 + (nearest.x - x2));
snapped = TRUE;
}
}
/* left edge */
coords1.x = x1;
coords1.y = y1;
coords2.x = x1;
coords2.y = y2;
if (gimp_stroke_nearest_tangent_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
snapped |= gimp_image_snap_distance (x1, nearest.x,
epsilon_x,
&mindist_x, tx1);
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
snapped |= gimp_image_snap_distance (y1, nearest.y,
epsilon_y,
&mindist_y, ty1);
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords2, &coords1,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
dist = ABS (nearest.y - y2);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty1 = RINT (y1 + (nearest.y - y2));
snapped = TRUE;
}
}
/* right edge */
coords1.x = x2;
coords1.y = y1;
coords2.x = x2;
coords2.y = y2;
if (gimp_stroke_nearest_tangent_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
dist = ABS (nearest.x - x2);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx1 = RINT (x1 + (nearest.x - x2));
snapped = TRUE;
}
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords1, &coords2,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
snapped |= gimp_image_snap_distance (y1, nearest.y,
epsilon_y,
&mindist_y, ty1);
}
if (gimp_stroke_nearest_intersection_get (stroke, &coords2, &coords1,
1.0, &nearest,
NULL, NULL, NULL) >= 0)
{
dist = ABS (nearest.y - y2);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty1 = RINT (y1 + (nearest.y - y2));
snapped = TRUE;
}
}
/* center */
coords1.x = x_center;
coords1.y = y_center;
if (gimp_stroke_nearest_point_get (stroke, &coords1, 1.0,
&nearest,
NULL, NULL, NULL) >= 0)
{
if (gimp_image_snap_distance (x_center, nearest.x,
epsilon_x,
&mindist_x, &nx))
{
mindist_x = ABS (nx - x_center);
*tx1 = RINT (x1 + (nx - x_center));
snapped = TRUE;
}
if (gimp_image_snap_distance (y_center, nearest.y,
epsilon_y,
&mindist_y, &ny))
{
mindist_y = ABS (ny - y_center);
*ty1 = RINT (y1 + (ny - y_center));
snapped = TRUE;
}
}
}
}
return snapped;
}
gboolean
gimp_image_snap_point (GimpImage *image,
gdouble x,
gdouble y,
gdouble *tx,
gdouble *ty,
gdouble epsilon_x,
gdouble epsilon_y,
gboolean snap_to_guides,
gboolean snap_to_grid,
gboolean snap_to_canvas,
gboolean snap_to_vectors)
{
gdouble mindist_x = G_MAXDOUBLE;
gdouble mindist_y = G_MAXDOUBLE;
gdouble dist;
gboolean snapped = FALSE;
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (tx != NULL, FALSE);
g_return_val_if_fail (ty != NULL, FALSE);
*tx = x;
*ty = y;
if (! gimp_image_get_guides (image)) snap_to_guides = FALSE;
if (! gimp_image_get_grid (image)) snap_to_grid = FALSE;
if (! gimp_image_get_active_vectors (image)) snap_to_vectors = FALSE;
if (! (snap_to_guides || snap_to_grid || snap_to_canvas || snap_to_vectors))
return FALSE;
if (x < -epsilon_x || x >= (gimp_image_get_width (image) + epsilon_x) ||
y < -epsilon_y || y >= (gimp_image_get_height (image) + epsilon_y))
{
return FALSE;
}
if (snap_to_guides)
{
GList *list;
for (list = gimp_image_get_guides (image); list; list = g_list_next (list))
{
GimpGuide *guide = list->data;
gint position = gimp_guide_get_position (guide);
if (position < 0)
continue;
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_HORIZONTAL:
dist = ABS (position - y);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty = position;
snapped = TRUE;
}
break;
case GIMP_ORIENTATION_VERTICAL:
dist = ABS (position - x);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx = position;
snapped = TRUE;
}
break;
default:
break;
}
}
}
if (snap_to_grid)
{
GimpGrid *grid = gimp_image_get_grid (image);
gdouble xspacing, yspacing;
gdouble xoffset, yoffset;
gdouble i;
g_object_get (grid,
"xspacing", &xspacing,
"yspacing", &yspacing,
"xoffset", &xoffset,
"yoffset", &yoffset,
NULL);
while (xoffset > xspacing)
xoffset -= xspacing;
while (yoffset > yspacing)
yoffset -= yspacing;
for (i = xoffset; i <= gimp_image_get_width (image); i += xspacing)
{
if (i < 0)
continue;
dist = ABS (i - x);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx = i;
snapped = TRUE;
}
}
for (i = yoffset; i <= gimp_image_get_height (image); i += yspacing)
{
if (i < 0)
continue;
dist = ABS (i - y);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty = i;
snapped = TRUE;
}
}
}
if (snap_to_canvas)
{
dist = ABS (x);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx = 0;
snapped = TRUE;
}
dist = ABS (gimp_image_get_width (image) - x);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx = gimp_image_get_width (image);
snapped = TRUE;
}
dist = ABS (y);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty = 0;
snapped = TRUE;
}
dist = ABS (gimp_image_get_height (image) - y);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty = gimp_image_get_height (image);
snapped = TRUE;
}
}
if (snap_to_vectors)
{
GimpVectors *vectors = gimp_image_get_active_vectors (image);
GimpStroke *stroke = NULL;
GimpCoords coords = { 0, 0, 0, 0, 0 };
coords.x = x;
coords.y = y;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
GimpCoords nearest;
if (gimp_stroke_nearest_point_get (stroke, &coords, 1.0,
&nearest,
NULL, NULL, NULL) >= 0)
{
dist = ABS (nearest.x - x);
if (dist < MIN (epsilon_x, mindist_x))
{
mindist_x = dist;
*tx = nearest.x;
snapped = TRUE;
}
dist = ABS (nearest.y - y);
if (dist < MIN (epsilon_y, mindist_y))
{
mindist_y = dist;
*ty = nearest.y;
snapped = TRUE;
}
}
}
}
return snapped;
}