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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#include <stdlib.h>
#include <stdio.h>
#include <vga.h>
#include <vgagl.h>
#include <time.h>
#include <unistd.h>
/* The logo was drawn by John Remyn. */
/* Feel free to provide a more beautiful/official/thought provoking/cool */
/* logo to replace it. */
#define LOGOWIDTH 201
#define LOGOHEIGHT 85
int VGAMODE;
int VIRTUAL;
GraphicsContext *backscreen;
GraphicsContext *physicalscreen;
void *logobitmap;
void loadbitmap(char *filename, void *buf)
{
FILE *f;
f = fopen(filename, "rb");
if(f==NULL)return;
fread(buf, 1, 17095, f);
fclose(f);
}
void test(void)
{
int i, j;
if (VIRTUAL)
gl_setcontext(backscreen);
gl_clearscreen(0);
for (i = 0; i < 5; i++) {
gl_clearscreen(0);
for (j = 0; j < 100000; j++)
gl_setpixel(random() % WIDTH, random() % HEIGHT,
random() % COLORS);
}
if (VIRTUAL)
gl_copyscreen(physicalscreen);
}
void setcustompalette(void)
{
/* colors 0-31 are an RGB mix (bits 0 and 1 red, 2 green, 3 and 4 blue) */
/* 32-63 black to red */
/* 64-95 black to green */
/* 96-127 black to yellow */
/* 128-159 black to blue */
/* 160-191 black to magenta */
/* 192-223 black to cyan */
/* 224-255 black to white */
Palette pal;
int i;
for (i = 0; i < 256; i++) {
int r, g, b;
r = g = b = 0;
if ((i & 32) > 0)
r = (i & 31) << 1;
if ((i & 64) > 0)
g = (i & 31) << 1;
if ((i & 128) > 0)
b = (i & 31) << 1;
if (i < 32) {
r = (i & 3) << 4; /* 2 bits */
g = (i & 4) << 3; /* 1 bit */
b = (i & 24) << 1; /* 2 bits */
}
pal.color[i].red = r;
pal.color[i].green = g;
pal.color[i].blue = b;
}
gl_setpalette(&pal);
}
void logotest(void)
{
int h;
void *scaled;
/* Set logo palette. */
setcustompalette();
/* Create logo bitmap */
logobitmap = alloca(LOGOWIDTH * LOGOHEIGHT);
loadbitmap("linuxlogo.bmp", logobitmap);
/* Allocate buffer for scaled bitmap. */
scaled = alloca(WIDTH * HEIGHT);
gl_clearscreen(0);
/* Stretch vertically. */
for (h = 0; h <= LOGOHEIGHT; h++) {
gl_scalebox(LOGOWIDTH, LOGOHEIGHT, logobitmap,
LOGOWIDTH, h, scaled);
gl_putbox(0, 0, LOGOWIDTH, h, scaled);
if (VIRTUAL)
gl_copyscreen(physicalscreen);
}
gl_clearscreen(0);
/* Scale to screen resolution. */
gl_scalebox(LOGOWIDTH, LOGOHEIGHT, logobitmap, WIDTH, HEIGHT, scaled);
gl_putbox(0, 0, WIDTH, HEIGHT, scaled);
gl_copyscreen(physicalscreen);
}
void main(void)
{
clock_t t1, t2;
vga_init();
t1=clock();
VGAMODE = vga_getdefaultmode();
if (VGAMODE == -1)
VGAMODE = G320x200x256; /* Default mode. */
if (!vga_hasmode(VGAMODE)) {
printf("Mode not available.\n");
exit(-1);
}
VIRTUAL = 0; /* No virtual screen. */
if (vga_getmodeinfo(VGAMODE)->colors == 16 ||
(vga_getmodeinfo(VGAMODE)->flags & IS_MODEX))
/* These modes are supported indirectly by vgagl. */
VIRTUAL = 1;
if (VIRTUAL) {
/* Create virtual screen. */
gl_setcontextvgavirtual(VGAMODE);
backscreen = gl_allocatecontext();
gl_getcontext(backscreen);
}
vga_setmode(VGAMODE);
gl_setcontextvga(VGAMODE); /* Physical screen context. */
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
if (COLORS == 256)
gl_setrgbpalette();
test();
/* Now do the same with clipping enabled. */
gl_clearscreen(0);
gl_setclippingwindow(WIDTH / 4, HEIGHT / 4, WIDTH - WIDTH / 4 - 1,
HEIGHT - HEIGHT / 4 - 1);
test();
gl_disableclipping();
if (COLORS == 256)
/* Show the logo if using 256 color mode. */
logotest();
if (VIRTUAL)
gl_freecontext(backscreen);
t2=clock();
printf("total:%1.2f sec\n",(1.0*t2-t1)/CLOCKS_PER_SEC);
vga_setmode(TEXT);
exit(0);
}
|
