path: root/libgnomecanvas/gnome-canvas-shape-private.h

#ifndef GNOME_CANVAS_SHAPE_PRIVATE_H
#define GNOME_CANVAS_SHAPE_PRIVATE_H

/* Bpath item type for GnomeCanvas widget
 *
 * GnomeCanvas is basically a port of the Tk toolkit's most excellent canvas widget.  Tk is
 * copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
 *
 * Copyright (C) 1998,1999 The Free Software Foundation
 *
 * Authors: Federico Mena <federico@nuclecu.unam.mx>
 *          Raph Levien <raph@acm.org>
 *          Lauris Kaplinski <lauris@ariman.ee>
 */

#include <gdk/gdk.h>
#include <libart_lgpl/art_vpath.h>
#include <libart_lgpl/art_svp.h>
#include <libart_lgpl/art_vpath_dash.h>
#include <libart_lgpl/art_svp_wind.h>
#include <libgnomecanvas/gnome-canvas.h>

#include <libgnomecanvas/gnome-canvas-path-def.h>

G_BEGIN_DECLS

typedef struct _GnomeCanvasShapePrivGdk GnomeCanvasShapePrivGdk;
typedef struct _GCBPDrawCtx GCBPDrawCtx;

/* Per canvas private structure, holding necessary data for rendering
 * temporary masks, which are needed for drawing multipart bpaths.
 * As canvas cannot multithread, we can be sure, that masks are used
 * serially, also one set of masks per canvas is sufficent to guarantee,
 * that masks are created on needed X server. Masks grow as needed.
 * Full structure is refcounted in Bpath implementation
 */

struct _GCBPDrawCtx {
    gint refcount;

    GnomeCanvas * canvas;

    gint width;
    gint height;

    GdkBitmap * mask;
    GdkBitmap * clip;

    GdkGC * clear_gc;
    GdkGC * xor_gc;
};

/* Per Bpath private structure, holding Gdk specific data */

struct _GnomeCanvasShapePrivGdk {
    gulong fill_pixel;      /* Color for fill */
    gulong outline_pixel;       /* Color for outline */

    GdkGC * fill_gc;        /* GC for filling */
    GdkGC * outline_gc;     /* GC for outline */

    gint len_points;        /* Size of allocated points array */
    gint num_points;        /* Gdk points in canvas coords */
    GdkPoint * points;      /* Ivariant: closed paths are before open ones */
    GSList * closed_paths;      /* List of lengths */
    GSList * open_paths;        /* List of lengths */

    GCBPDrawCtx * ctx;      /* Pointer to per-canvas drawing context */
};

struct _GnomeCanvasShapePriv {
    GnomeCanvasPathDef * path;      /* Our bezier path representation */

    gdouble scale;          /* CTM scaling (for pen) */

    guint fill_set : 1;     /* Is fill color set? */
    guint outline_set : 1;      /* Is outline color set? */
    guint width_pixels : 1;     /* Is outline width specified in pixels or units? */

    gdouble width;          /* Width of outline, in user coords */

    guint32 fill_rgba;      /* Fill color, RGBA */
    guint32 outline_rgba;       /* Outline color, RGBA */

    GdkCapStyle cap;        /* Cap style for line */
    GdkJoinStyle join;      /* Join style for line */
    ArtWindRule wind;       /* Winding rule */
    gdouble miterlimit;     /* Miter limit */

    ArtVpathDash dash;      /* Dashing pattern */

    ArtSVP * fill_svp;      /* The SVP for the filled shape */
    ArtSVP * outline_svp;       /* The SVP for the outline shape */

    GnomeCanvasShapePrivGdk * gdk;  /* Gdk specific things */
};

G_END_DECLS

#endif