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GnomeCanvasPoints * | gnome_canvas_points_new () |
GnomeCanvasPoints * | gnome_canvas_points_ref () |
void | gnome_canvas_points_free () |
int | gnome_canvas_get_miter_points () |
void | gnome_canvas_get_butt_points () |
double | gnome_canvas_polygon_to_point () |
void | gnome_canvas_render_svp () |
void | gnome_canvas_update_svp () |
void | gnome_canvas_update_svp_clip () |
void | gnome_canvas_item_reset_bounds () |
void | gnome_canvas_item_update_svp () |
void | gnome_canvas_item_update_svp_clip () |
void | gnome_canvas_item_request_redraw_svp () |
void | gnome_canvas_update_bbox () |
void | gnome_canvas_buf_ensure_buf () |
ArtPathStrokeJoinType | gnome_canvas_join_gdk_to_art () |
ArtPathStrokeCapType | gnome_canvas_cap_gdk_to_art () |
GnomeCanvasPoints *
gnome_canvas_points_new (int num_points
);
Creates a structure that should be used to pass an array of points to items.
GnomeCanvasPoints *
gnome_canvas_points_ref (GnomeCanvasPoints *points
);
Increases the reference count of the specified points structure.
void
gnome_canvas_points_free (GnomeCanvasPoints *points
);
Decreases the reference count of the specified points structure. If it reaches zero, then the structure is freed.
int gnome_canvas_get_miter_points (double x1
,double y1
,double x2
,double y2
,double x3
,double y3
,double width
,double *mx1
,double *my1
,double *mx2
,double *my2
);
Given three points forming an angle, computes the coordinates of the inside and outside points of the mitered corner formed by a line of a given width at that angle.
x1 |
X coordinate of the first point |
|
y1 |
Y coordinate of the first point |
|
x2 |
X coordinate of the second (angle) point |
|
y2 |
Y coordinate of the second (angle) point |
|
x3 |
X coordinate of the third point |
|
y3 |
Y coordinate of the third point |
|
width |
Width of the line |
|
mx1 |
The X coordinate of the first miter point is returned here. |
|
my1 |
The Y coordinate of the first miter point is returned here. |
|
mx2 |
The X coordinate of the second miter point is returned here. |
|
my2 |
The Y coordinate of the second miter point is returned here. |
void gnome_canvas_get_butt_points (double x1
,double y1
,double x2
,double y2
,double width
,int project
,double *bx1
,double *by1
,double *bx2
,double *by2
);
Computes the butt points of a line segment.
x1 |
X coordinate of first point in the line |
|
y1 |
Y cooordinate of first point in the line |
|
x2 |
X coordinate of second point (endpoint) of the line |
|
y2 |
Y coordinate of second point (endpoint) of the line |
|
width |
Width of the line |
|
project |
Whether the butt points should project out by width/2 distance |
|
bx1 |
X coordinate of first butt point is returned here |
|
by1 |
Y coordinate of first butt point is returned here |
|
bx2 |
X coordinate of second butt point is returned here |
|
by2 |
Y coordinate of second butt point is returned here |
double gnome_canvas_polygon_to_point (double *poly
,int num_points
,double x
,double y
);
Computes the distance between a point and a polygon.
void gnome_canvas_render_svp (GnomeCanvasBuf *buf
,ArtSVP *svp
,guint32 rgba
);
Render the svp over the buf.
void gnome_canvas_update_svp (GnomeCanvas *canvas
,ArtSVP **p_svp
,ArtSVP *new_svp
);
Sets the svp to the new value, requesting repaint on what's changed. This function takes responsibility for freeing new_svp.
void gnome_canvas_update_svp_clip (GnomeCanvas *canvas
,ArtSVP **p_svp
,ArtSVP *new_svp
,ArtSVP *clip_svp
);
Sets the svp to the new value, clipping if necessary, and requesting repaint on what's changed. This function takes responsibility for freeing new_svp.
void
gnome_canvas_item_reset_bounds (GnomeCanvasItem *item
);
Resets the bounding box of a canvas item to an empty rectangle.
void gnome_canvas_item_update_svp (GnomeCanvasItem *item
,ArtSVP **p_svp
,ArtSVP *new_svp
);
Sets the svp to the new value, requesting repaint on what's changed. This function takes responsibility for freeing new_svp. This routine also adds the svp's bbox to the item's.
void gnome_canvas_item_update_svp_clip (GnomeCanvasItem *item
,ArtSVP **p_svp
,ArtSVP *new_svp
,ArtSVP *clip_svp
);
Sets the svp to the new value, clipping if necessary, and requesting repaint on what's changed. This function takes responsibility for freeing new_svp.
void gnome_canvas_item_request_redraw_svp (GnomeCanvasItem *item
,const ArtSVP *svp
);
Request redraw of the svp if in aa mode, or the entire item in in xlib mode.
void gnome_canvas_update_bbox (GnomeCanvasItem *item
,int x1
,int y1
,int x2
,int y2
);
Sets the bbox to the new value, requesting full repaint.
void
gnome_canvas_buf_ensure_buf (GnomeCanvasBuf *buf
);
Ensure that the buffer is in RGB format, suitable for compositing.
ArtPathStrokeJoinType
gnome_canvas_join_gdk_to_art (GdkJoinStyle gdk_join
);
Convert from GDK line join specifier to libart.
ArtPathStrokeCapType
gnome_canvas_cap_gdk_to_art (GdkCapStyle gdk_cap
);
Convert from GDK line cap specifier to libart.