1999-10-22 16:19:59 +00:00
|
|
|
|
/* GNOME libraries - GdkPixbuf item for the GNOME canvas
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 1999 The Free Software Foundation
|
|
|
|
|
*
|
|
|
|
|
* Author: Federico Mena-Quintero <federico@gimp.org>
|
|
|
|
|
*
|
|
|
|
|
* This library is free software; you can redistribute it and/or
|
|
|
|
|
* modify it under the terms of the GNU Library General Public
|
|
|
|
|
* License as published by the Free Software Foundation; either
|
|
|
|
|
* version 2 of the License, or (at your option) any later version.
|
|
|
|
|
*
|
|
|
|
|
* This library is distributed in the hope that it will be useful,
|
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
|
* Library General Public License for more details.
|
|
|
|
|
*
|
|
|
|
|
* You should have received a copy of the GNU Library General Public
|
|
|
|
|
* License along with this library; if not, write to the
|
|
|
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
|
|
* Boston, MA 02111-1307, USA.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include <config.h>
|
1999-10-25 23:43:04 +00:00
|
|
|
|
#include <math.h>
|
1999-10-26 23:29:59 +00:00
|
|
|
|
#include <libart_lgpl/art_rgb_affine_private.h>
|
1999-10-23 00:06:10 +00:00
|
|
|
|
#include "gdk-pixbuf.h"
|
1999-10-22 16:19:59 +00:00
|
|
|
|
#include "gnome-canvas-pixbuf.h"
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1999-10-23 00:06:10 +00:00
|
|
|
|
/* Private part of the GnomeCanvasPixbuf structure */
|
|
|
|
|
typedef struct {
|
|
|
|
|
/* Our gdk-pixbuf */
|
|
|
|
|
GdkPixbuf *pixbuf;
|
|
|
|
|
|
|
|
|
|
/* Width value */
|
|
|
|
|
double width;
|
|
|
|
|
|
|
|
|
|
/* Height value */
|
|
|
|
|
double height;
|
|
|
|
|
|
|
|
|
|
/* Whether dimensions are set and whether they are in pixels or units */
|
|
|
|
|
guint width_set : 1;
|
|
|
|
|
guint width_pixels : 1;
|
|
|
|
|
guint height_set : 1;
|
|
|
|
|
guint height_pixels : 1;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
|
|
|
|
/* Whether the pixbuf has changed */
|
|
|
|
|
guint need_pixbuf_update : 1;
|
|
|
|
|
|
|
|
|
|
/* Whether the size has changed */
|
|
|
|
|
guint need_size_update : 1;
|
1999-10-23 00:06:10 +00:00
|
|
|
|
} PixbufPrivate;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Object argument IDs */
|
|
|
|
|
enum {
|
|
|
|
|
ARG_0,
|
|
|
|
|
ARG_PIXBUF,
|
|
|
|
|
ARG_WIDTH,
|
|
|
|
|
ARG_WIDTH_SET,
|
|
|
|
|
ARG_WIDTH_PIXELS,
|
|
|
|
|
ARG_HEIGHT,
|
|
|
|
|
ARG_HEIGHT_SET,
|
|
|
|
|
ARG_HEIGHT_PIXELS
|
|
|
|
|
};
|
|
|
|
|
|
1999-10-22 16:19:59 +00:00
|
|
|
|
static void gnome_canvas_pixbuf_class_init (GnomeCanvasPixbufClass *class);
|
|
|
|
|
static void gnome_canvas_pixbuf_init (GnomeCanvasPixbuf *cpb);
|
|
|
|
|
static void gnome_canvas_pixbuf_destroy (GtkObject *object);
|
1999-10-23 00:06:10 +00:00
|
|
|
|
static void gnome_canvas_pixbuf_set_arg (GtkObject *object, GtkArg *arg, guint arg_id);
|
|
|
|
|
static void gnome_canvas_pixbuf_get_arg (GtkObject *object, GtkArg *arg, guint arg_id);
|
1999-10-22 16:19:59 +00:00
|
|
|
|
|
1999-10-25 23:43:04 +00:00
|
|
|
|
static void gnome_canvas_pixbuf_update (GnomeCanvasItem *item, double *affine,
|
|
|
|
|
ArtSVP *clip_path, int flags);
|
|
|
|
|
static void gnome_canvas_pixbuf_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
|
|
|
|
|
int x, int y, int width, int height);
|
|
|
|
|
static double gnome_canvas_pixbuf_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
|
|
|
|
|
GnomeCanvasItem **actual_item);
|
|
|
|
|
static void gnome_canvas_pixbuf_bounds (GnomeCanvasItem *item,
|
|
|
|
|
double *x1, double *y1, double *x2, double *y2);
|
|
|
|
|
|
1999-10-22 16:19:59 +00:00
|
|
|
|
static GnomeCanvasItemClass *parent_class;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* gnome_canvas_pixbuf_get_type:
|
1999-10-25 23:43:04 +00:00
|
|
|
|
* @void:
|
|
|
|
|
*
|
1999-10-22 16:19:59 +00:00
|
|
|
|
* Registers the &GnomeCanvasPixbuf class if necessary, and returns the type ID
|
|
|
|
|
* associated to it.
|
1999-10-25 23:43:04 +00:00
|
|
|
|
*
|
1999-10-22 16:19:59 +00:00
|
|
|
|
* Return value: The type ID of the &GnomeCanvasPixbuf class.
|
|
|
|
|
**/
|
|
|
|
|
GtkType
|
|
|
|
|
gnome_canvas_pixbuf_get_type (void)
|
|
|
|
|
{
|
|
|
|
|
static GtkType canvas_pixbuf_type = 0;
|
|
|
|
|
|
|
|
|
|
if (!canvas_pixbuf_type) {
|
|
|
|
|
static const GtkTypeInfo canvas_pixbuf_info = {
|
|
|
|
|
"GnomeCanvasPixbuf",
|
|
|
|
|
sizeof (GnomeCanvasPixbuf),
|
|
|
|
|
sizeof (GnomeCanvasPixbufClass),
|
|
|
|
|
(GtkClassInitFunc) gnome_canvas_pixbuf_class_init,
|
|
|
|
|
(GtkObjectInitFunc) gnome_canvas_pixbuf_init,
|
|
|
|
|
NULL, /* reserved_1 */
|
|
|
|
|
NULL, /* reserved_2 */
|
|
|
|
|
(GtkClassInitFunc) NULL
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
canvas_pixbuf_type = gtk_type_unique (gnome_canvas_item_get_type (),
|
|
|
|
|
&canvas_pixbuf_info);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return canvas_pixbuf_type;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Class initialization function for the pixbuf canvas item */
|
1999-10-23 00:06:10 +00:00
|
|
|
|
static void
|
|
|
|
|
gnome_canvas_pixbuf_class_init (GnomeCanvasPixbufClass *class)
|
|
|
|
|
{
|
|
|
|
|
GtkObjectClass *object_class;
|
|
|
|
|
GnomeCanvasItemClass *item_class;
|
|
|
|
|
|
|
|
|
|
object_class = (GtkObjectClass *) class;
|
|
|
|
|
item_class = (GnomeCanvasItemClass *) class;
|
|
|
|
|
|
|
|
|
|
parent_class = gtk_type_class (gnome_canvas_item_get_type ());
|
|
|
|
|
|
|
|
|
|
gtk_object_add_arg_type ("GnomeCanvasPixbuf::pixbuf",
|
|
|
|
|
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_PIXBUF);
|
|
|
|
|
gtk_object_add_arg_type ("GnomeCanvasPixbuf::width",
|
|
|
|
|
GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_WIDTH);
|
|
|
|
|
gtk_object_add_arg_type ("GnomeCanvasPixbuf::width_set",
|
|
|
|
|
GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_WIDTH_SET);
|
|
|
|
|
gtk_object_add_arg_type ("GnomeCanvasPixbuf::width_pixels",
|
|
|
|
|
GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_WIDTH_PIXELS);
|
|
|
|
|
gtk_object_add_arg_type ("GnomeCanvasPixbuf::height",
|
|
|
|
|
GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_HEIGHT);
|
|
|
|
|
gtk_object_add_arg_type ("GnomeCanvasPixbuf::height_set",
|
|
|
|
|
GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_HEIGHT_SET);
|
|
|
|
|
gtk_object_add_arg_type ("GnomeCanvasPixbuf::height_pixels",
|
|
|
|
|
GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_HEIGHT_PIXELS);
|
|
|
|
|
|
|
|
|
|
object_class->destroy = gnome_canvas_pixbuf_destroy;
|
|
|
|
|
object_class->set_arg = gnome_canvas_pixbuf_set_arg;
|
|
|
|
|
object_class->get_arg = gnome_canvas_pixbuf_get_arg;
|
|
|
|
|
|
|
|
|
|
item_class->update = gnome_canvas_pixbuf_update;
|
|
|
|
|
item_class->draw = gnome_canvas_pixbuf_draw;
|
|
|
|
|
item_class->point = gnome_canvas_pixbuf_point;
|
|
|
|
|
item_class->bounds = gnome_canvas_pixbuf_bounds;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Object initialization function for the pixbuf canvas item */
|
|
|
|
|
static void
|
|
|
|
|
gnome_canvas_pixbuf_init (GnomeCanvasPixbuf *gcp)
|
|
|
|
|
{
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
|
|
|
|
|
priv = g_new0 (PixbufPrivate, 1);
|
|
|
|
|
gcp->priv = priv;
|
|
|
|
|
|
|
|
|
|
priv->width = 0.0;
|
|
|
|
|
priv->height = 0.0;
|
|
|
|
|
}
|
|
|
|
|
|
1999-10-25 23:43:04 +00:00
|
|
|
|
/* Destroy handler for the pixbuf canvas item */
|
1999-10-23 00:06:10 +00:00
|
|
|
|
static void
|
|
|
|
|
gnome_canvas_pixbuf_destroy (GtkObject *object)
|
|
|
|
|
{
|
1999-10-25 23:43:04 +00:00
|
|
|
|
GnomeCanvasPixbuf *gcp;
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
|
1999-10-23 00:06:10 +00:00
|
|
|
|
g_return_if_fail (object != NULL);
|
|
|
|
|
g_return_if_fail (GNOME_IS_CANVAS_PIXBUF (object));
|
|
|
|
|
|
1999-10-25 23:43:04 +00:00
|
|
|
|
gcp = (GNOME_CANVAS_PIXBUF (object));
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
/* FIXME: redraw area */
|
|
|
|
|
|
|
|
|
|
if (priv->pixbuf)
|
|
|
|
|
gdk_pixbuf_unref (priv->pixbuf);
|
|
|
|
|
|
|
|
|
|
g_free (priv);
|
|
|
|
|
|
|
|
|
|
if (GTK_OBJECT_CLASS (parent_class)->destroy)
|
|
|
|
|
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Set_arg handler for the pixbuf canvas item */
|
|
|
|
|
static void
|
|
|
|
|
gnome_canvas_pixbuf_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
|
|
|
|
|
{
|
|
|
|
|
GnomeCanvasItem *item;
|
|
|
|
|
GnomeCanvasPixbuf *gcp;
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
GdkPixbuf *pixbuf;
|
|
|
|
|
double val;
|
|
|
|
|
|
|
|
|
|
item = GNOME_CANVAS_ITEM (object);
|
|
|
|
|
gcp = GNOME_CANVAS_PIXBUF (object);
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
switch (arg_id) {
|
|
|
|
|
case ARG_PIXBUF:
|
|
|
|
|
pixbuf = GTK_VALUE_POINTER (*arg);
|
|
|
|
|
if (pixbuf != priv->pixbuf) {
|
1999-10-26 23:29:59 +00:00
|
|
|
|
if (pixbuf) {
|
|
|
|
|
g_return_if_fail (pixbuf->art_pixbuf->format != ART_PIX_RGB);
|
|
|
|
|
g_return_if_fail (pixbuf->art_pixbuf->n_channels == 3
|
|
|
|
|
|| pixbuf->art_pixbuf->n_channels == 4);
|
|
|
|
|
g_return_if_fail (pixbuf->art_pixbuf->bits_per_sample == 8);
|
|
|
|
|
|
1999-10-25 23:43:04 +00:00
|
|
|
|
gdk_pixbuf_ref (pixbuf);
|
1999-10-26 23:29:59 +00:00
|
|
|
|
}
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
|
|
|
|
if (priv->pixbuf)
|
|
|
|
|
gdk_pixbuf_unref (priv->pixbuf);
|
|
|
|
|
|
|
|
|
|
priv->pixbuf = pixbuf;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
priv->need_pixbuf_update = TRUE;
|
|
|
|
|
gnome_canvas_item_request_update (item);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_WIDTH:
|
|
|
|
|
val = GTK_VALUE_DOUBLE (*arg);
|
|
|
|
|
g_return_if_fail (val >= 0.0);
|
|
|
|
|
priv->width = val;
|
|
|
|
|
priv->need_size_update = TRUE;
|
|
|
|
|
gnome_canvas_item_request_update (item);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_WIDTH_SET:
|
|
|
|
|
priv->width_set = GTK_VALUE_BOOL (*arg) ? TRUE : FALSE;
|
|
|
|
|
priv->need_size_update = TRUE;
|
|
|
|
|
gnome_canvas_item_request_update (item);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_WIDTH_PIXELS:
|
|
|
|
|
priv->width_pixels = GTK_VALUE_BOOL (*arg) ? TRUE : FALSE;
|
|
|
|
|
priv->need_size_update = TRUE;
|
|
|
|
|
gnome_canvas_item_request_update (item);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_HEIGHT:
|
|
|
|
|
val = GTK_VALUE_DOUBLE (*arg);
|
|
|
|
|
g_return_if_fail (val >= 0.0);
|
|
|
|
|
priv->height = val;
|
|
|
|
|
priv->need_size_update = TRUE;
|
|
|
|
|
gnome_canvas_item_request_update (item);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_HEIGHT_SET:
|
|
|
|
|
priv->height_set = GTK_VALUE_BOOL (*arg) ? TRUE : FALSE;
|
|
|
|
|
priv->need_size_update = TRUE;
|
|
|
|
|
gnome_canvas_item_request_update (item);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_HEIGHT_PIXELS:
|
|
|
|
|
priv->height_pixels = GTK_VALUE_BOOL (*arg) ? TRUE : FALSE;
|
|
|
|
|
priv->need_size_update = TRUE;
|
|
|
|
|
gnome_canvas_item_request_update (item);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Get_arg handler for the pixbuf canvasi item */
|
|
|
|
|
static void
|
|
|
|
|
gnome_canvas_pixbuf_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
|
|
|
|
|
{
|
|
|
|
|
GnomeCanvasItem *item;
|
|
|
|
|
GnomeCanvasPixbuf *gcp;
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
|
|
|
|
|
item = GNOME_CANVAS_ITEM (object);
|
|
|
|
|
gcp = GNOME_CANVAS_PIXBUF (object);
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
switch (arg_id) {
|
|
|
|
|
case ARG_PIXBUF:
|
|
|
|
|
GTK_VALUE_POINTER (*arg) = priv->pixbuf;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_WIDTH:
|
|
|
|
|
GTK_VALUE_DOUBLE (*arg) = priv->width;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_WIDTH_SET:
|
|
|
|
|
GTK_VALUE_BOOL (*arg) = priv->width_set;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_WIDTH_PIXELS:
|
|
|
|
|
GTK_VALUE_BOOL (*arg) = priv->width_pixels;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_HEIGHT:
|
|
|
|
|
GTK_VALUE_DOUBLE (*arg) = priv->height;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_HEIGHT_SET:
|
|
|
|
|
GTK_VALUE_BOOL (*arg) = priv->height_set;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ARG_HEIGHT_PIXELS:
|
|
|
|
|
GTK_VALUE_BOOL (*arg) = priv->height_pixels;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
arg->type = GTK_TYPE_INVALID;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1999-10-26 23:29:59 +00:00
|
|
|
|
/* Bounds and utilities */
|
|
|
|
|
|
|
|
|
|
/* Computes horizontal and vertical scaling vectors for the final transformation
|
|
|
|
|
* to canvas pixel coordinates of a pixbuf canvas item. The horizontal and
|
|
|
|
|
* vertical dimensions may be specified in units or pixels, separately, so we
|
|
|
|
|
* have to compute the components individually for each dimension.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
compute_xform_vectors (GnomeCanvasPixbuf *gcp, double *i2c, ArtPoint *i_c, ArtPoint *j_c)
|
|
|
|
|
{
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
ArtPoint orig, orig_c;
|
|
|
|
|
ArtPoint i, j;
|
|
|
|
|
double length;
|
|
|
|
|
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
/* Our origin */
|
|
|
|
|
|
|
|
|
|
orig.x = 0.0;
|
|
|
|
|
orig.y = 0.0;
|
|
|
|
|
art_affine_point (&orig_c, &orig, i2c);
|
|
|
|
|
|
|
|
|
|
/* Horizontal and vertical vectors */
|
|
|
|
|
|
|
|
|
|
i.x = 1.0;
|
|
|
|
|
i.y = 0.0;
|
|
|
|
|
art_affine_point (&i_c, &i, i2c);
|
|
|
|
|
i_c.x -= orig_c.x;
|
|
|
|
|
i_c.y -= orig_c.y;
|
|
|
|
|
|
|
|
|
|
j.x = 0.0;
|
|
|
|
|
j.y = 1.0;
|
|
|
|
|
art_affine_point (&j_c, &j, i2c);
|
|
|
|
|
j_c.x -= orig_c.x;
|
|
|
|
|
j_c.y -= orig_c.y;
|
|
|
|
|
|
|
|
|
|
/* Compute the scaling vectors. If a dimension is specified in pixels,
|
|
|
|
|
* we normalize the base vector first so that it will represent the size
|
|
|
|
|
* in pixels when scaled.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
if (priv->width_pixels) {
|
|
|
|
|
length = sqrt (i_c.x * i_c.x + i_c.y * i_c.y);
|
|
|
|
|
|
|
|
|
|
if (length > GNOME_CANVAS_EPSILON) {
|
|
|
|
|
i_c->x /= length;
|
|
|
|
|
i_c->y /= length;
|
|
|
|
|
} else
|
|
|
|
|
i_c->x = i_c->y = 0.0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (priv->height_pixels) {
|
|
|
|
|
length = sqrt (j_c.x * j_c.x + j_c.y * j_c.y);
|
|
|
|
|
|
|
|
|
|
if (length > GNOME_CANVAS_EPSILON) {
|
|
|
|
|
j_c->x /= length;
|
|
|
|
|
j_c->y /= length;
|
|
|
|
|
} else
|
|
|
|
|
j_c->x = j_c->y = 0.0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
1999-10-25 23:43:04 +00:00
|
|
|
|
/* Recomputes the bounding box of a pixbuf canvas item. The horizontal and
|
|
|
|
|
* vertical dimensions may be specified in units or pixels, separately, so we
|
|
|
|
|
* have to compute the components individually for each dimension.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
recompute_bounding_box (GnomeCanvasPixbuf *gcp)
|
|
|
|
|
{
|
|
|
|
|
GnomeCanvasItem *item;
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
double i2c[6];
|
|
|
|
|
ArtPoint orig, orig_c;
|
1999-10-26 23:29:59 +00:00
|
|
|
|
ArtPoint i_c, j_c;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
double w, h;
|
|
|
|
|
double length;
|
|
|
|
|
double x1, y1, x2, y2, x3, y3, x4, y4;
|
|
|
|
|
double mx1, my1, mx2, my2;
|
|
|
|
|
|
|
|
|
|
item = GNOME_CANVAS_ITEM (gcp);
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
if (!priv->pixbuf) {
|
|
|
|
|
item->x1 = item->y1 = item->x2 = item->y2 = 0.0;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
gnome_canvas_item_i2c_affine (item, i2c);
|
|
|
|
|
|
|
|
|
|
/* Our "origin" */
|
|
|
|
|
|
|
|
|
|
orig.x = 0.0;
|
|
|
|
|
orig.y = 0.0;
|
|
|
|
|
art_affine_point (&orig_c, &orig, i2c);
|
|
|
|
|
|
|
|
|
|
/* Horizontal and vertical vectors */
|
|
|
|
|
|
1999-10-26 23:29:59 +00:00
|
|
|
|
compute_xform_vectors (gcp, i2c, &i_c, &j_c);
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
1999-10-26 23:29:59 +00:00
|
|
|
|
/* Width vector */
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
1999-10-26 23:29:59 +00:00
|
|
|
|
if (priv->width_set)
|
1999-10-25 23:43:04 +00:00
|
|
|
|
w = priv->width;
|
1999-10-26 23:29:59 +00:00
|
|
|
|
else if (priv->pixbuf)
|
1999-10-25 23:43:04 +00:00
|
|
|
|
w = priv->pixbuf->art_pixbuf->width;
|
1999-10-26 23:29:59 +00:00
|
|
|
|
else
|
|
|
|
|
w = 0.0;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
|
|
|
|
i_c.x *= w;
|
|
|
|
|
i_c.y *= w;
|
|
|
|
|
|
|
|
|
|
/* Height */
|
|
|
|
|
|
1999-10-26 23:29:59 +00:00
|
|
|
|
if (priv->height_set)
|
1999-10-25 23:43:04 +00:00
|
|
|
|
h = priv->height;
|
1999-10-26 23:29:59 +00:00
|
|
|
|
else if (priv->pixbuf)
|
1999-10-25 23:43:04 +00:00
|
|
|
|
h = priv->pixbuf->art_pixbuf->height;
|
1999-10-26 23:29:59 +00:00
|
|
|
|
else
|
|
|
|
|
h = 0.0;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
|
|
|
|
j_c.x *= h;
|
|
|
|
|
j_c.y *= h;
|
|
|
|
|
|
|
|
|
|
/* Compute vertices */
|
|
|
|
|
|
1999-10-26 02:19:43 +00:00
|
|
|
|
x1 = orig_c.x;
|
|
|
|
|
y1 = orig_c.y;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
1999-10-26 02:19:43 +00:00
|
|
|
|
x2 = orig_c.x + i_c.x;
|
1999-10-26 23:29:59 +00:00
|
|
|
|
y2 = orig_c.y + i_c.y;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
1999-10-26 02:19:43 +00:00
|
|
|
|
x3 = orig_c.x + j_c.x;
|
|
|
|
|
y3 = orig_c.y + j_c.y;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
1999-10-26 02:19:43 +00:00
|
|
|
|
x4 = orig_c.x + i_c.x + j_c.x;
|
|
|
|
|
y4 = orig_c.y + i_c.y + j_c.y;
|
1999-10-25 23:43:04 +00:00
|
|
|
|
|
|
|
|
|
/* Compute bounds */
|
|
|
|
|
|
|
|
|
|
mx1 = MIN (x1, x2);
|
|
|
|
|
my1 = MIN (y1, y2);
|
|
|
|
|
mx2 = MAX (x3, x4);
|
|
|
|
|
my2 = MAX (y3, y4);
|
|
|
|
|
|
|
|
|
|
if (mx1 < mx2) {
|
|
|
|
|
item->x1 = mx1;
|
|
|
|
|
item->x2 = mx2;
|
|
|
|
|
} else {
|
|
|
|
|
item->x1 = mx2;
|
|
|
|
|
item->x2 = mx1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (my1 < my2) {
|
|
|
|
|
item->y1 = my1;
|
|
|
|
|
item->y2 = my2;
|
|
|
|
|
} else {
|
|
|
|
|
item->y1 = my2;
|
|
|
|
|
item->y2 = my1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
1999-10-26 23:29:59 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Update sequence */
|
|
|
|
|
|
1999-10-25 23:43:04 +00:00
|
|
|
|
/* Update handler for the pixbuf canvas item */
|
|
|
|
|
static void
|
|
|
|
|
gnome_canvas_pixbuf_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
|
|
|
|
|
{
|
|
|
|
|
GnomeCanvasPixbuf *gcp;
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
|
|
|
|
|
gcp = GNOME_CANVAS_PIXBUF (item);
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
if (parent_class->update)
|
|
|
|
|
(* parent_class->update) (item, affine, clip_path, flags);
|
|
|
|
|
|
|
|
|
|
if (((flags & GNOME_CANVAS_UPDATE_VISIBILITY)
|
|
|
|
|
&& !(GTK_OBJECT_FLAGS (item) & GNOME_CANVAS_ITEM_VISIBLE))
|
|
|
|
|
|| (flags & GNOME_CANVAS_UPDATE_AFFINE)
|
|
|
|
|
|| priv->need_pixbuf_update
|
|
|
|
|
|| priv->need_size_update)
|
|
|
|
|
gnome_canvas_request_redraw (item, item->x1, item->y1, item->x2, item->y2);
|
|
|
|
|
|
|
|
|
|
/* If we need a pixbuf update, or if the item changed visibility to
|
|
|
|
|
* shown, recompute the bounding box.
|
|
|
|
|
*/
|
|
|
|
|
if (priv->need_pixbuf_update
|
|
|
|
|
|| priv->need_size_update
|
|
|
|
|
|| ((flags & GNOME_CANVAS_UPDATE_VISIBILITY)
|
|
|
|
|
&& (GTK_OBJECT_FLAGS (ii) & GNOME_CANVAS_ITEM_VISIBLE))
|
|
|
|
|
|| (flags & GNOME_CANVAS_UPDATE_AFFINE)) {
|
|
|
|
|
recompute_bounding_box (gcp);
|
|
|
|
|
gnome_canvas_request_redraw (item->canvas, item->x1, item->y1, item->x2, item->y2);
|
|
|
|
|
priv->need_pixbuf_update = FALSE;
|
|
|
|
|
priv->need_size_update = FALSE;
|
|
|
|
|
}
|
1999-10-23 00:06:10 +00:00
|
|
|
|
|
|
|
|
|
}
|
1999-10-26 23:29:59 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Rendering */
|
|
|
|
|
|
|
|
|
|
/* Fills the specified buffer with the transformed version of a pixbuf */
|
|
|
|
|
static void
|
|
|
|
|
transform_pixbuf (guchar *dest, int x, int y, int width, int height, int rowstride,
|
|
|
|
|
GdkPixbuf *pixbuf, double *affine)
|
|
|
|
|
{
|
|
|
|
|
ArtPixbuf *apb;
|
|
|
|
|
int xx, yy;
|
|
|
|
|
double inv[6];
|
|
|
|
|
guchar *src, *d;
|
|
|
|
|
ArtPoint src_p, dest_p;
|
|
|
|
|
int run_x1, run_x2;
|
|
|
|
|
int src_x, src_y;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
apb = pixbuf->art_pixbuf;
|
|
|
|
|
|
|
|
|
|
art_affine_invert (inv, affine);
|
|
|
|
|
|
|
|
|
|
for (yy = 0; yy < height; yy++) {
|
|
|
|
|
dest_p.y = y + yy + 0.5;
|
|
|
|
|
|
|
|
|
|
run_x1 = x;
|
|
|
|
|
run_x1 = x + width;
|
|
|
|
|
art_affine_run (&run_x1, &run_x2, yy + y,
|
|
|
|
|
apb->width, apb->height,
|
|
|
|
|
inv);
|
|
|
|
|
|
|
|
|
|
d = dest + yy * rowstride + (run_x1 - x) * 4;
|
|
|
|
|
|
|
|
|
|
for (xx = run_x0; xx < run-x1; xx++) {
|
|
|
|
|
dest_p.x = x + 0.5;
|
|
|
|
|
art_affine_point (&src_p, &dest_p, inv);
|
|
|
|
|
src_x = floor (src_p.x + 0.5);
|
|
|
|
|
src_y = floor (src_p.y + 0.5);
|
|
|
|
|
|
|
|
|
|
src = apb->pixels + src_y * apb->rowstride + src_x * apb->num_channels;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < apb->num_channels; i++)
|
|
|
|
|
*d++ = *src++;
|
|
|
|
|
|
|
|
|
|
if (!apb->has_alpha)
|
|
|
|
|
d++; /* It is already zeroed */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Draw handler for the pixbuf canvas item */
|
|
|
|
|
static void
|
|
|
|
|
gnome_canvas_pixbuf_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
|
|
|
|
|
int x, int y, int width, int height)
|
|
|
|
|
{
|
|
|
|
|
GnomeCanvasPixbuf *gcp;
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
double i2c[6];
|
|
|
|
|
ArtPoint i_c, j_c;
|
|
|
|
|
double i_len, j_len;
|
|
|
|
|
double scale[6], final[6];
|
|
|
|
|
guchar *buf;
|
1999-10-27 23:36:44 +00:00
|
|
|
|
GdkPixbuf *pixbuf;
|
1999-10-26 23:29:59 +00:00
|
|
|
|
|
|
|
|
|
gcp = GNOME_CANVAS_PIXBUF (item);
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
if (!priv->pixbuf)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* Compute scaling factors and build the final affine */
|
|
|
|
|
|
|
|
|
|
gnome_canvas_item_i2c_affine (item, i2c);
|
|
|
|
|
compute_xform_vectors (gcp, i2c, &i_c, &j_c);
|
|
|
|
|
|
|
|
|
|
i_len = sqrt (i_c.x * i_c.x + i_c.y * i_c.y);
|
|
|
|
|
j_len = sqrt (j_c.x * j_c.x + j_c.y * j_c.y);
|
|
|
|
|
|
|
|
|
|
art_affine_scale (scale, i_len, j_len);
|
|
|
|
|
art_affine_multiply (final, i2c, scale);
|
|
|
|
|
|
1999-10-27 17:31:07 +00:00
|
|
|
|
buf = g_new0 (guchar, width * height * 4);
|
|
|
|
|
transform_pixbuf (buf, x, y, width, height, width * 4, priv->pixbuf, final);
|
1999-10-27 23:36:44 +00:00
|
|
|
|
|
|
|
|
|
pixbuf = gdk_pixbuf_new_from_data (buf, ART_PIX_RGB, TRUE,
|
|
|
|
|
width, height, width * 4,
|
|
|
|
|
NULL, NULL);
|
|
|
|
|
|
1999-11-01 19:09:20 +00:00
|
|
|
|
gdk_pixbuf_render_to_drawable_alpha (pixbuf, drawable,
|
|
|
|
|
0, 0,
|
|
|
|
|
0, 0,
|
|
|
|
|
width, height,
|
|
|
|
|
GDK_PIXBUF_ALPHA_BILEVEL,
|
|
|
|
|
127,
|
|
|
|
|
GDK_RGB_DITHER_MAX,
|
|
|
|
|
x, y);
|
1999-10-27 23:36:44 +00:00
|
|
|
|
|
|
|
|
|
gdk_pixbuf_unref (pixbuf);
|
|
|
|
|
g_free (buf);
|
1999-10-26 23:29:59 +00:00
|
|
|
|
}
|
1999-11-01 19:09:20 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Point handler for the pixbuf canvas item */
|
|
|
|
|
static double
|
|
|
|
|
gnome_canvas_pixbuf_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
|
|
|
|
|
GnomeCanvasItem **actual_item)
|
|
|
|
|
{
|
|
|
|
|
GnomeCanvasPixbuf *gcp;
|
|
|
|
|
PixbufPrivate *priv;
|
|
|
|
|
|
|
|
|
|
gcp = GNOME_CANVAS_PIXBUF (item);
|
|
|
|
|
priv = gcp->priv;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
}
|