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gtk-canvas-image.h

/* Image item type for GtkCanvas widget
 *
 * GtkCanvas 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 The Free Software Foundation
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx>
 */

#ifndef GTK_CANVAS_IMAGE_H
#define GTK_CANVAS_IMAGE_H

#include <gtk-canvas/gtk-canvas-defs.h>
#include <gtk/gtkpacker.h> /* why the hell is GtkAnchorType here and not in gtkenums.h? */
#include <gdk_imlib.h>
#include <libart_lgpl/art_misc.h>
#include <libart_lgpl/art_pixbuf.h>
#include "gtk-canvas/gtk-canvas.h"


BEGIN_GTK_CANVAS_DECLS


/* Image item for the canvas.  Images are positioned by anchoring them to a point.
 * The following arguments are available:
 *
 * name           type              read/write  description
 * ------------------------------------------------------------------------------------------
 * image    GdkImlibImage*          RW          Pointer to a GdkImlibImage
 * pixbuf   ArtPixBuf*        W           Pointer to an ArtPixBuf (aa-mode)
 * x        double                  RW          X coordinate of anchor point
 * y        double                  RW          Y coordinate of anchor point
 * width    double                  RW          Width to scale image to, in canvas units
 * height   double                  RW          Height to scale image to, in canvas units
 * anchor   GtkAnchorType           RW          Anchor side for the image
 */


#define GTK_CANVAS_TYPE_CANVAS_IMAGE            (gtk_canvas_image_get_type ())
#define GTK_CANVAS_IMAGE(obj)            (GTK_CHECK_CAST ((obj), GTK_CANVAS_TYPE_CANVAS_IMAGE, GtkCanvasImage))
#define GTK_CANVAS_IMAGE_CLASS(klass)    (GTK_CHECK_CLASS_CAST ((klass), GTK_CANVAS_TYPE_CANVAS_IMAGE, GtkCanvasImageClass))
#define GTK_CANVAS_IS_CANVAS_IMAGE(obj)         (GTK_CHECK_TYPE ((obj), GTK_CANVAS_TYPE_CANVAS_IMAGE))
#define GTK_CANVAS_IS_CANVAS_IMAGE_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_CANVAS_TYPE_CANVAS_IMAGE))


typedef struct _GtkCanvasImage GtkCanvasImage;
typedef struct _GtkCanvasImageClass GtkCanvasImageClass;

struct _GtkCanvasImage {
      GtkCanvasItem item;

      GdkImlibImage *im;            /* The image to paint */
      GdkPixmap *pixmap;            /* Pixmap rendered from the image */
      GdkBitmap *mask;        /* Mask rendered from the image */

      double x, y;                  /* Position at anchor, item relative */
      double width, height;         /* Size of image, item relative */
      GtkAnchorType anchor;         /* Anchor side for image */

      int cx, cy;             /* Top-left canvas coordinates for display */
      int cwidth, cheight;          /* Rendered size in pixels */
      GdkGC *gc;              /* GC for drawing image */

      unsigned int need_recalc : 1; /* Do we need to rescale the image? */

      ArtPixBuf *pixbuf;            /* A pixbuf, for aa rendering */
      double affine[6];               /* The item -> canvas affine */
};

struct _GtkCanvasImageClass {
      GtkCanvasItemClass parent_class;
};


/* Standard Gtk function */
GtkType gtk_canvas_image_get_type (void);


END_GTK_CANVAS_DECLS

#endif

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