587 lines
14 KiB
C
587 lines
14 KiB
C
/* Image item type for GnomeCanvas widget
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*
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* GnomeCanvas is basically a port of the Tk toolkit's most excellent canvas widget. Tk is
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* copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
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*
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* Copyright (C) 1998 The Free Software Foundation
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*
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* Author: Federico Mena <federico@nuclecu.unam.mx>
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*/
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#include <string.h> /* for memcpy() */
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#include <math.h>
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#include <stdio.h>
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#include "libart_lgpl/art_misc.h"
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#include "libart_lgpl/art_affine.h"
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#include "libart_lgpl/art_pixbuf.h"
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#include "libart_lgpl/art_rgb_pixbuf_affine.h"
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#include "canvas-imageframe.h"
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#include <libgnomecanvas/gnome-canvas-util.h>
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#include "gettext.h"
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#define _(Text) dgettext (PACKAGE,Text)
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//GTK2FIX
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//#include <libgnomecanvas/gnome-canvastypebuiltins.h>
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enum {
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PROP_0,
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PROP_PIXBUF,
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PROP_X,
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PROP_Y,
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PROP_WIDTH,
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PROP_HEIGHT,
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PROP_DRAWWIDTH,
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PROP_ANCHOR
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};
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static void gnome_canvas_imageframe_class_init(GnomeCanvasImageFrameClass* class) ;
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static void gnome_canvas_imageframe_init(GnomeCanvasImageFrame* image) ;
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static void gnome_canvas_imageframe_destroy(GtkObject* object) ;
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static void gnome_canvas_imageframe_set_property(GObject* object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gnome_canvas_imageframe_get_property(GObject* object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gnome_canvas_imageframe_update(GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags) ;
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static void gnome_canvas_imageframe_realize(GnomeCanvasItem *item) ;
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static void gnome_canvas_imageframe_unrealize(GnomeCanvasItem *item) ;
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static void gnome_canvas_imageframe_draw(GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int width, int height) ;
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static double gnome_canvas_imageframe_point(GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item) ;
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static void gnome_canvas_imageframe_bounds(GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2) ;
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static void gnome_canvas_imageframe_render(GnomeCanvasItem *item, GnomeCanvasBuf *buf) ;
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static GnomeCanvasItemClass *parent_class;
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GType
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gnome_canvas_imageframe_get_type (void)
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{
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static GType imageframe_type = 0;
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if (!imageframe_type) {
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GtkTypeInfo imageframe_info = {
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"GnomeCanvasImageFrame",
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sizeof (GnomeCanvasImageFrame),
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sizeof (GnomeCanvasImageFrameClass),
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(GtkClassInitFunc) gnome_canvas_imageframe_class_init,
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(GtkObjectInitFunc) gnome_canvas_imageframe_init,
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NULL, /* reserved_1 */
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NULL, /* reserved_2 */
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(GtkClassInitFunc) NULL
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};
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imageframe_type = gtk_type_unique (gnome_canvas_item_get_type (), &imageframe_info);
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}
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return imageframe_type;
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}
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static void
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gnome_canvas_imageframe_class_init (GnomeCanvasImageFrameClass *class)
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{
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GObjectClass *gobject_class;
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GtkObjectClass *object_class;
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GnomeCanvasItemClass *item_class;
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gobject_class = (GObjectClass *) class;
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object_class = (GtkObjectClass *) class;
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item_class = (GnomeCanvasItemClass *) class;
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parent_class = gtk_type_class (gnome_canvas_item_get_type ());
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gobject_class->set_property = gnome_canvas_imageframe_set_property;
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gobject_class->get_property = gnome_canvas_imageframe_get_property;
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g_object_class_install_property (gobject_class,
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PROP_PIXBUF,
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g_param_spec_pointer ("pixbuf",
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_("pixbuf"),
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_("the pixbuf"),
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G_PARAM_WRITABLE));
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g_object_class_install_property (gobject_class,
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PROP_X,
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g_param_spec_double ("x",
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_("x"),
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_("x coordinate of upper left corner of rect"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_Y,
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g_param_spec_double ("y",
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_("y"),
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_("y coordinate of upper left corner of rect "),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_WIDTH,
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g_param_spec_double ("width",
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_("width"),
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_("the width"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_DRAWWIDTH,
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g_param_spec_double ("drawwidth",
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_("drawwidth"),
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_("drawn width"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_HEIGHT,
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g_param_spec_double ("height",
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_("height"),
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_("the height"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_ANCHOR,
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g_param_spec_enum ("anchor",
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_("anchor"),
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_("the anchor"),
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GTK_TYPE_ANCHOR_TYPE,
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GTK_ANCHOR_NW,
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G_PARAM_READWRITE));
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object_class->destroy = gnome_canvas_imageframe_destroy;
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item_class->update = gnome_canvas_imageframe_update;
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item_class->realize = gnome_canvas_imageframe_realize;
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item_class->unrealize = gnome_canvas_imageframe_unrealize;
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item_class->draw = gnome_canvas_imageframe_draw;
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item_class->point = gnome_canvas_imageframe_point;
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item_class->bounds = gnome_canvas_imageframe_bounds;
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item_class->render = gnome_canvas_imageframe_render;
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}
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static void
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gnome_canvas_imageframe_init (GnomeCanvasImageFrame *image)
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{
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image->x = 0.0;
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image->y = 0.0;
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image->width = 0.0;
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image->height = 0.0;
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image->drawwidth = 0.0;
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image->anchor = GTK_ANCHOR_CENTER;
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}
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static void
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gnome_canvas_imageframe_destroy (GtkObject *object)
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{
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GnomeCanvasImageFrame *image;
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g_return_if_fail (object != NULL);
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g_return_if_fail (GNOME_CANVAS_IS_CANVAS_IMAGEFRAME (object));
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image = GNOME_CANVAS_IMAGEFRAME (object);
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image->cwidth = 0;
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image->cheight = 0;
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if (image->pixbuf)
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{
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art_pixbuf_free (image->pixbuf);
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image->pixbuf = NULL;
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}
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if(GTK_OBJECT_CLASS (parent_class)->destroy)
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{
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(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
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}
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}
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/* Get's the image bounds expressed as item-relative coordinates. */
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static void
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get_bounds_item_relative (GnomeCanvasImageFrame *image, double *px1, double *py1, double *px2, double *py2)
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{
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GnomeCanvasItem *item;
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double x, y;
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item = GNOME_CANVAS_ITEM (image);
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/* Get item coordinates */
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x = image->x;
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y = image->y;
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/* Anchor image */
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switch (image->anchor) {
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case GTK_ANCHOR_NW:
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case GTK_ANCHOR_W:
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case GTK_ANCHOR_SW:
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break;
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case GTK_ANCHOR_N:
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case GTK_ANCHOR_CENTER:
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case GTK_ANCHOR_S:
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x -= image->width / 2;
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break;
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case GTK_ANCHOR_NE:
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case GTK_ANCHOR_E:
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case GTK_ANCHOR_SE:
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x -= image->width;
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break;
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}
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switch (image->anchor) {
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case GTK_ANCHOR_NW:
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case GTK_ANCHOR_N:
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case GTK_ANCHOR_NE:
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break;
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case GTK_ANCHOR_W:
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case GTK_ANCHOR_CENTER:
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case GTK_ANCHOR_E:
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y -= image->height / 2;
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break;
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case GTK_ANCHOR_SW:
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case GTK_ANCHOR_S:
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case GTK_ANCHOR_SE:
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y -= image->height;
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break;
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}
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/* Bounds */
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*px1 = x;
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*py1 = y;
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*px2 = x + image->width;
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*py2 = y + image->height;
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}
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static void
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gnome_canvas_imageframe_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GnomeCanvasItem *item;
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GnomeCanvasImageFrame *image;
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int update;
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int calc_bounds;
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item = GNOME_CANVAS_ITEM (object);
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image = GNOME_CANVAS_IMAGEFRAME (object);
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update = FALSE;
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calc_bounds = FALSE;
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switch (prop_id) {
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case PROP_PIXBUF:
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if (item->canvas->aa && g_value_get_pointer (value)) {
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if (image->pixbuf != NULL)
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art_pixbuf_free (image->pixbuf);
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image->pixbuf = g_value_get_pointer (value);
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}
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update = TRUE;
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break;
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case PROP_X:
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image->x = g_value_get_double (value);
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update = TRUE;
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break;
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case PROP_Y:
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image->y = g_value_get_double (value);
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update = TRUE;
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break;
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case PROP_WIDTH:
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image->width = fabs (g_value_get_double (value));
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update = TRUE;
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break;
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case PROP_HEIGHT:
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image->height = fabs (g_value_get_double (value));
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update = TRUE;
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break;
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case PROP_DRAWWIDTH:
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image->drawwidth = fabs (g_value_get_double (value));
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update = TRUE;
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break;
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case PROP_ANCHOR:
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image->anchor = g_value_get_enum (value);
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update = TRUE;
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break;
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default:
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break;
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}
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if (update)
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gnome_canvas_item_request_update (item);
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}
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static void
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gnome_canvas_imageframe_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GnomeCanvasImageFrame *image;
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image = GNOME_CANVAS_IMAGEFRAME (object);
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switch (prop_id) {
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case PROP_X:
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g_value_set_double (value, image->x);
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break;
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case PROP_Y:
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g_value_set_double (value, image->y);
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break;
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case PROP_WIDTH:
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g_value_set_double (value, image->width);
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break;
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case PROP_HEIGHT:
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g_value_set_double (value, image->height);
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break;
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case PROP_DRAWWIDTH:
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g_value_set_double (value, image->drawwidth);
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break;
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case PROP_ANCHOR:
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g_value_set_enum (value, image->anchor);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gnome_canvas_imageframe_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
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{
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GnomeCanvasImageFrame *image;
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ArtDRect i_bbox, c_bbox;
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int w = 0;
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int h = 0;
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image = GNOME_CANVAS_IMAGEFRAME (item);
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if (parent_class->update)
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(* parent_class->update) (item, affine, clip_path, flags);
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/* only works for non-rotated, non-skewed transforms */
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image->cwidth = (int) (image->width * affine[0] + 0.5);
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image->cheight = (int) (image->height * affine[3] + 0.5);
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if (image->pixbuf) {
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image->need_recalc = TRUE ;
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}
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get_bounds_item_relative (image, &i_bbox.x0, &i_bbox.y0, &i_bbox.x1, &i_bbox.y1);
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art_drect_affine_transform (&c_bbox, &i_bbox, affine);
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/* these values only make sense in the non-rotated, non-skewed case */
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image->cx = c_bbox.x0;
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image->cy = c_bbox.y0;
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/* add a fudge factor */
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c_bbox.x0--;
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c_bbox.y0--;
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c_bbox.x1++;
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c_bbox.y1++;
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gnome_canvas_update_bbox (item, c_bbox.x0, c_bbox.y0, c_bbox.x1, c_bbox.y1);
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if (image->pixbuf) {
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w = image->pixbuf->width;
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h = image->pixbuf->height;
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}
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image->affine[0] = (affine[0] * image->width) / w;
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image->affine[1] = (affine[1] * image->height) / h;
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image->affine[2] = (affine[2] * image->width) / w;
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image->affine[3] = (affine[3] * image->height) / h;
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image->affine[4] = i_bbox.x0 * affine[0] + i_bbox.y0 * affine[2] + affine[4];
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image->affine[5] = i_bbox.x0 * affine[1] + i_bbox.y0 * affine[3] + affine[5];
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}
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static void
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gnome_canvas_imageframe_realize (GnomeCanvasItem *item)
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{
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GnomeCanvasImageFrame *image;
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image = GNOME_CANVAS_IMAGEFRAME (item);
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if (parent_class->realize)
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(* parent_class->realize) (item);
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}
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static void
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gnome_canvas_imageframe_unrealize (GnomeCanvasItem *item)
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{
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GnomeCanvasImageFrame *image;
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image = GNOME_CANVAS_IMAGEFRAME(item);
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if (parent_class->unrealize)
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(* parent_class->unrealize) (item);
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}
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static void
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recalc_if_needed (GnomeCanvasImageFrame *image)
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{}
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static void
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gnome_canvas_imageframe_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
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int x, int y, int width, int height)
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{
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}
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static double
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gnome_canvas_imageframe_point (GnomeCanvasItem *item, double x, double y,
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int cx, int cy, GnomeCanvasItem **actual_item)
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{
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GnomeCanvasImageFrame *image;
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int x1, y1, x2, y2;
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int dx, dy;
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image = GNOME_CANVAS_IMAGEFRAME (item);
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*actual_item = item;
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recalc_if_needed (image);
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x1 = image->cx - item->canvas->close_enough;
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y1 = image->cy - item->canvas->close_enough;
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x2 = image->cx + image->cwidth - 1 + item->canvas->close_enough;
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y2 = image->cy + image->cheight - 1 + item->canvas->close_enough;
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/* Hard case: is point inside image's gravity region? */
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//if ((cx >= x1) && (cy >= y1) && (cx <= x2) && (cy <= y2))
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//return dist_to_mask (image, cx, cy) / item->canvas->pixels_per_unit;
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/* Point is outside image */
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x1 += item->canvas->close_enough;
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y1 += item->canvas->close_enough;
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x2 -= item->canvas->close_enough;
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y2 -= item->canvas->close_enough;
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if (cx < x1)
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dx = x1 - cx;
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else if (cx > x2)
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dx = cx - x2;
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else
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dx = 0;
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if (cy < y1)
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dy = y1 - cy;
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else if (cy > y2)
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dy = cy - y2;
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else
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dy = 0;
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return sqrt (dx * dx + dy * dy) / item->canvas->pixels_per_unit;
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}
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static void
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gnome_canvas_imageframe_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
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{
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GnomeCanvasImageFrame *image;
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image = GNOME_CANVAS_IMAGEFRAME (item);
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*x1 = image->x;
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*y1 = image->y;
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switch (image->anchor) {
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case GTK_ANCHOR_NW:
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case GTK_ANCHOR_W:
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case GTK_ANCHOR_SW:
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break;
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case GTK_ANCHOR_N:
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case GTK_ANCHOR_CENTER:
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case GTK_ANCHOR_S:
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*x1 -= image->width / 2.0;
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break;
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case GTK_ANCHOR_NE:
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case GTK_ANCHOR_E:
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case GTK_ANCHOR_SE:
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*x1 -= image->width;
|
|
break;
|
|
}
|
|
|
|
switch (image->anchor) {
|
|
case GTK_ANCHOR_NW:
|
|
case GTK_ANCHOR_N:
|
|
case GTK_ANCHOR_NE:
|
|
break;
|
|
|
|
case GTK_ANCHOR_W:
|
|
case GTK_ANCHOR_CENTER:
|
|
case GTK_ANCHOR_E:
|
|
*y1 -= image->height / 2.0;
|
|
break;
|
|
|
|
case GTK_ANCHOR_SW:
|
|
case GTK_ANCHOR_S:
|
|
case GTK_ANCHOR_SE:
|
|
*y1 -= image->height;
|
|
break;
|
|
}
|
|
|
|
*x2 = *x1 + image->width;
|
|
*y2 = *y1 + image->height;
|
|
}
|
|
|
|
static void
|
|
gnome_canvas_imageframe_render (GnomeCanvasItem *item, GnomeCanvasBuf *buf)
|
|
{
|
|
GnomeCanvasImageFrame *image;
|
|
|
|
image = GNOME_CANVAS_IMAGEFRAME (item);
|
|
|
|
gnome_canvas_buf_ensure_buf (buf);
|
|
|
|
#ifdef VERBOSE
|
|
{
|
|
char str[128];
|
|
art_affine_to_string (str, image->affine);
|
|
g_print ("gnome_canvas_imageframe_render %s\n", str);
|
|
}
|
|
#endif
|
|
|
|
art_rgb_pixbuf_affine (buf->buf,
|
|
buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1,
|
|
buf->buf_rowstride,
|
|
image->pixbuf,
|
|
image->affine,
|
|
ART_FILTER_NEAREST, NULL);
|
|
|
|
buf->is_bg = 0;
|
|
}
|