1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "display-types.h"
#include "config/gimpdisplayconfig.h"
#include "core/gimp.h"
#include "core/gimpimage.h"
#include "gimpdisplay.h"
#include "gimpdisplay-handlers.h"
/* local function prototypes */
static void gimp_display_update_handler (GimpProjection *projection,
gboolean now,
gint x,
gint y,
gint w,
gint h,
GimpDisplay *gdisp);
static void gimp_display_flush_handler (GimpImage *gimage,
GimpDisplay *gdisp);
/* public functions */
void
gimp_display_connect (GimpDisplay *gdisp,
GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (gdisp->gimage == NULL);
gdisp->gimage = gimage;
gdisp->instance = gimage->instance_count;
gimage->instance_count++; /* this is obsolete */
gimage->disp_count++;
#if 0
g_print ("%s: gimage->ref_count before refing: %d\n",
G_STRFUNC, G_OBJECT (gdisp->gimage)->ref_count);
#endif
g_object_ref (gimage);
g_signal_connect (gimage->projection, "update",
G_CALLBACK (gimp_display_update_handler),
gdisp);
g_signal_connect (gimage, "flush",
G_CALLBACK (gimp_display_flush_handler),
gdisp);
}
void
gimp_display_disconnect (GimpDisplay *gdisp)
{
GimpImage *gimage;
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
g_return_if_fail (GIMP_IS_IMAGE (gdisp->gimage));
g_signal_handlers_disconnect_by_func (gdisp->gimage,
gimp_display_flush_handler,
gdisp);
g_signal_handlers_disconnect_by_func (gdisp->gimage->projection,
gimp_display_update_handler,
gdisp);
gdisp->gimage->disp_count--;
#if 0
g_print ("%s: gimage->ref_count before unrefing: %d\n",
G_STRFUNC, G_OBJECT (gdisp->gimage)->ref_count);
#endif
/* set gdisp->gimage to NULL before unrefing because there may be code
* that listens for image removals and then iterates the display list
* to find a valid display.
*/
gimage = gdisp->gimage;
gdisp->gimage = NULL;
g_object_unref (gimage);
}
/* private functions */
static void
gimp_display_update_handler (GimpProjection *projection,
gboolean now,
gint x,
gint y,
gint w,
gint h,
GimpDisplay *gdisp)
{
gimp_display_update_area (gdisp, now, x, y, w, h);
}
static void
gimp_display_flush_handler (GimpImage *gimage,
GimpDisplay *gdisp)
{
gimp_display_flush (gdisp);
}
|
