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
|
#include <stdlib.h>
#include <stdio.h>
#include "iup.h"
#include "cd.h"
#include "cdiup.h"
#include "cddbuf.h"
static void appUpdateRender(cdCanvas *cddbuffer)
{
int width, height;
cdCanvasBackground(cddbuffer, CD_WHITE);
cdCanvasClear(cddbuffer);
cdCanvasForeground(cddbuffer, CD_RED);
cdCanvasGetSize(cddbuffer, &width, &height, NULL, NULL);
cdCanvasLine(cddbuffer, 0, 0, width-1, height-1);
cdCanvasLine(cddbuffer, 0, height-1, width-1, 0);
}
static int redraw_cb(Ihandle *ih)
{
cdCanvas *cddbuffer = (cdCanvas*)IupGetAttribute(ih, "_APP_CDDBUFFER");
if (!cddbuffer)
return IUP_DEFAULT;
/* update display */
cdCanvasFlush(cddbuffer);
return IUP_DEFAULT;
}
static int resize_cb(Ihandle *ih)
{
cdCanvas *cddbuffer = (cdCanvas*)IupGetAttribute(ih, "_APP_CDDBUFFER");
if (!cddbuffer)
{
cdCanvas *cdcanvas = (cdCanvas*)IupGetAttribute(ih, "_APP_CDCANVAS");
/* update canvas size */
cdCanvasActivate(cdcanvas);
/* this can fail if canvas size is zero */
cddbuffer = cdCreateCanvas(CD_DBUFFER, cdcanvas);
}
if (!cddbuffer)
return IUP_DEFAULT;
/* update size */
cdCanvasActivate(cddbuffer);
/* update render */
appUpdateRender(cddbuffer);
return IUP_DEFAULT;
}
static int map_cb(Ihandle *ih)
{
cdCanvas *cddbuffer, *cdcanvas;
cdcanvas = cdCreateCanvas(CD_IUP, ih);
if (!cdcanvas)
return IUP_DEFAULT;
/* this can fail if canvas size is zero */
cddbuffer = cdCreateCanvas(CD_DBUFFER, cdcanvas);
IupSetAttribute(ih, "_APP_CDCANVAS", (char*)cdcanvas);
IupSetAttribute(ih, "_APP_CDDBUFFER", (char*)cddbuffer);
return IUP_DEFAULT;
}
static int unmap_cb(Ihandle *ih)
{
cdCanvas *cddbuffer = (cdCanvas*)IupGetAttribute(ih, "_APP_CDDBUFFER");
cdCanvas *cdcanvas = (cdCanvas*)IupGetAttribute(ih, "_APP_CDCANVAS");
if (cddbuffer)
cdKillCanvas(cddbuffer);
if (cdcanvas)
cdKillCanvas(cdcanvas);
return IUP_DEFAULT;
}
void CanvasCDDBufferTest(void)
{
Ihandle *dlg, *canvas;
canvas = IupCanvas(NULL);
IupSetAttribute(canvas, "RASTERSIZE", "300x200"); /* initial size */
IupSetCallback(canvas, "RESIZE_CB", (Icallback)resize_cb);
IupSetCallback(canvas, "ACTION", (Icallback)redraw_cb);
IupSetCallback(canvas, "MAP_CB", (Icallback)map_cb);
IupSetCallback(canvas, "UNMAP_CB", (Icallback)unmap_cb);
dlg = IupDialog(canvas);
IupSetAttribute(dlg, "TITLE", "CD Double Buffer Test");
IupMap(dlg);
IupSetAttribute(canvas, "RASTERSIZE", NULL); /* release the minimum limitation */
IupShowXY(dlg,IUP_CENTER,IUP_CENTER);
}
#ifndef BIG_TEST
int main(int argc, char* argv[])
{
IupOpen(&argc, &argv);
CanvasCDDBufferTest();
IupMainLoop();
IupClose();
return EXIT_SUCCESS;
}
#endif
|
