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
131
132
133
134
135
136
137
138
139
140
141
142
|
#define __SP_CANVAS_UTILS_C__
/*
* Helper stuff for SPCanvas
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
*
* Copyright (C) 1999-2002 authors
* Copyright (C) 2001-2002 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <2geom/matrix.h>
#include "libnr/nr-pixops.h"
#include "sp-canvas-util.h"
#include <string.h> /* for memset */
void
sp_canvas_update_bbox (SPCanvasItem *item, int x1, int y1, int x2, int y2)
{
sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
item->x1 = x1;
item->y1 = y1;
item->x2 = x2;
item->y2 = y2;
sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
}
void
sp_canvas_item_reset_bounds (SPCanvasItem *item)
{
item->x1 = 0.0;
item->y1 = 0.0;
item->x2 = 0.0;
item->y2 = 0.0;
}
void
sp_canvas_prepare_buffer (SPCanvasBuf *buf)
{
if (buf->is_empty) {
sp_canvas_clear_buffer(buf);
buf->is_empty = false;
}
}
void
sp_canvas_clear_buffer (SPCanvasBuf *buf)
{
unsigned char r, g, b;
r = (buf->bg_color >> 16) & 0xff;
g = (buf->bg_color >> 8) & 0xff;
b = buf->bg_color & 0xff;
if ((r != g) || (r != b)) {
int x, y;
for (y = buf->rect.y0; y < buf->rect.y1; y++) {
unsigned char *p;
p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride;
for (x = buf->rect.x0; x < buf->rect.x1; x++) {
*p++ = r;
*p++ = g;
*p++ = b;
}
}
} else {
int y;
for (y = buf->rect.y0; y < buf->rect.y1; y++) {
memset (buf->buf + (y - buf->rect.y0) * buf->buf_rowstride, r, 4 * (buf->rect.x1 - buf->rect.x0));
}
}
}
Geom::Matrix sp_canvas_item_i2p_affine (SPCanvasItem * item)
{
g_assert (item != NULL); /* this may be overly zealous - it is
* plausible that this gets called
* with item == 0. */
return item->xform;
}
Geom::Matrix sp_canvas_item_i2i_affine (SPCanvasItem * from, SPCanvasItem * to)
{
g_assert (from != NULL);
g_assert (to != NULL);
return sp_canvas_item_i2w_affine(from) * sp_canvas_item_i2w_affine(to).inverse();
}
void sp_canvas_item_set_i2w_affine (SPCanvasItem * item, Geom::Matrix const &i2w)
{
g_assert (item != NULL);
sp_canvas_item_affine_absolute(item, i2w * sp_canvas_item_i2w_affine(item->parent).inverse());
}
void sp_canvas_item_move_to_z (SPCanvasItem * item, gint z)
{
g_assert (item != NULL);
gint current_z = sp_canvas_item_order (item);
if (current_z == -1) // not found in its parent
return;
if (z == current_z)
return;
if (z > current_z)
sp_canvas_item_raise (item, z - current_z);
sp_canvas_item_lower (item, current_z - z);
}
gint
sp_canvas_item_compare_z (SPCanvasItem * a, SPCanvasItem * b)
{
gint const o_a = sp_canvas_item_order (a);
gint const o_b = sp_canvas_item_order (b);
if (o_a > o_b) return -1;
if (o_a < o_b) return 1;
return 0;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
|
