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
|
/* Dia -- an diagram creation/manipulation program
* Copyright (C) 1998 Alexander Larsson
*
* 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.
*/
/* This renderer is similar to RenderGdk, except that it renders onto
* its own little GdkPixmap, doesn't deal with the DDisplay at all, and
* uses a 1-1 mapping between points and pixels. It is used for rendering
* arrows and lines onto selectors. This way, any change in the arrow
* definitions are automatically reflected in the selectors.
*/
/*
* 2002-10-06 : Leaved the original comment but removed almost
* anything else. The 'RendererPixmap' now uses the DiaGdkRenderer which
* is the ported to GObject 'RendererGdk'. No more huge code duplication
* but only some renderer parametrization tweaking. --hb
*/
#include <config.h>
#include <math.h>
#include <stdlib.h>
#include <gdk/gdk.h>
#include "render_pixmap.h"
#include "message.h"
#include "diagdkrenderer.h"
static Rectangle rect;
static real zoom = 1.0;
DiaRenderer *
new_pixmap_renderer(GdkWindow *window, int width, int height)
{
DiaGdkRenderer *renderer;
GdkColor color;
rect.left = 0;
rect.top = 0;
rect.right = width;
rect.bottom = height;
renderer = g_object_new (DIA_TYPE_GDK_RENDERER, NULL);
renderer->transform = dia_transform_new (&rect, &zoom);
renderer->pixmap = gdk_pixmap_new(window, width, height, -1);
renderer->gc = gdk_gc_new(window);
gdk_color_white(gdk_colormap_get_system(), &color);
gdk_gc_set_foreground(renderer->gc, &color);
gdk_draw_rectangle(renderer->pixmap, renderer->gc, 1,
0, 0, width, height);
return DIA_RENDERER(renderer);
}
void
renderer_pixmap_set_pixmap (DiaRenderer *ren,
GdkDrawable *drawable,
int xoffset, int yoffset,
int width, int height)
{
DiaGdkRenderer *renderer = DIA_GDK_RENDERER (ren);
if (renderer->pixmap != NULL)
gdk_pixmap_unref(renderer->pixmap);
if (renderer->gc != NULL)
gdk_gc_unref(renderer->gc);
gdk_pixmap_ref(drawable);
renderer->pixmap = drawable;
renderer->gc = gdk_gc_new(drawable);
rect.left = -xoffset;
rect.top = -yoffset;
rect.right = width;
rect.bottom = height;
}
GdkPixmap *
renderer_pixmap_get_pixmap (DiaRenderer *ren)
{
DiaGdkRenderer *renderer = DIA_GDK_RENDERER (ren);
return renderer->pixmap;
}
|
