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
|
//http://wiki.osdev.org/GUI
#include "kernel.h"
typedef struct vbeinfo_struct{
char VbeSignature[4]; // == "VESA"
uint16_t VbeVersion; // == 0x0300 for VBE 3.0
uint16_t OemStringPtr[2]; // isa vbeFarPtr
uint8_t Capabilities[4];
uint16_t VideoModePtr[2]; // isa vbeFarPtr
uint16_t TotalMemory; // as # of 64KB blocks
}vbeinfo;
typedef struct ModeInfoBlock {
uint16_t attributes;
uint8_t winA,winB;
uint16_t granularity;
uint16_t winsize;
uint16_t segmentA, segmentB;
uint16_t realFctPtr[2];
// VBE_FAR(realFctPtr);
uint16_t pitch; // bytes per scanline
uint16_t Xres, Yres;
uint8_t Wchar, Ychar, planes, bpp, banks;
uint8_t memory_model, bank_size, image_pages;
uint8_t reserved0;
uint8_t red_mask, red_position;
uint8_t green_mask, green_position;
uint8_t blue_mask, blue_position;
uint8_t rsv_mask, rsv_position;
uint8_t directcolor_attributes;
uint32_t physbase; // your LFB (Linear Framebuffer) address ;)
uint32_t reserved1;
uint16_t reserved2;
}vbemodeinfo;
typedef struct foolfont_struct
{
uint8_t line[10]; //every single fool font consists of 10 lines a 8 bit
}foolfont;
static foolfont *deffont;
static vbemodeinfo *VbeModeInfoBlock;
void vesa_init(vbeinfo *info,vbemodeinfo *mode,foolfont *rawfont)
{
//the only functionallu important 2 init lines! (rest is log)
VbeModeInfoBlock=mode;
deffont=rawfont;
//
PutString("Welcome to Fool OS 001",30,30,0xfff00);
int i=0;
scr_put_string("vesa: init vbe version: ");
scr_put_hex(info[i].VbeVersion);
scr_put_string(" / videomode ptr: ");
scr_put_hex(info[i].VideoModePtr[0]);
scr_put_hex(info[i].VideoModePtr[1]);
scr_put_string_nl("");
int *modeptr=info[i].VideoModePtr[0]; // todo: take segment from vbeinfo!
while(*modeptr!=0xffff&&*modeptr!=0)
{
scr_put_string("vesa: mode supported: ");
scr_put_hex(*modeptr);
scr_put_string_nl("");
modeptr++;
}
scr_put_string("vesa: selected mode res: ");
scr_put_hex(mode->Xres);
scr_put_string(" x ");
scr_put_hex(mode->Yres);
scr_put_string_nl("");
scr_put_string("vesa: selected mode banks: ");
scr_put_hex(mode->banks);
scr_put_string_nl("");
scr_put_string("vesa: attribs: ");
scr_put_hex(mode->attributes);
scr_put_string_nl("");
scr_put_string("vesa: physbase: ");
scr_put_hex32(mode->physbase);
scr_put_string_nl("");
scr_put_string("vesa: bpp: ");
scr_put_hex(mode->bpp);
scr_put_string_nl("");
}
void PutPixel(int x,int y, int color){
//do not write memory outside the screen buffer, check parameters against the VBE mode info
if (x<0 || x>VbeModeInfoBlock->Xres|| y<0 || y>VbeModeInfoBlock->Yres) return;
if (x) x = (x*(VbeModeInfoBlock->bpp>>3)); // get bytes (divide by 8)
if (y) y = (y*VbeModeInfoBlock->pitch);
uint8_t *cTemp=VbeModeInfoBlock->physbase;
cTemp[x+y] = (uint8_t)(color & 0xff);
cTemp[x+y+1] = (uint8_t)((color>>8) & 0xff);
cTemp[x+y+2] = (uint8_t)((color>>16) & 0xff);
}
void PutFont(char c, int x,int y, int color)
{
int fnt=0;
if(c>='A'&&c<='Z')fnt=c-'A'+1;
else if(c>='a'&&c<='z')fnt=c-'a'+1;
else if(c>='0'&&c<='9')fnt=c-'0'+28;
else if(c=' ')fnt=27;
int posx, posy, sizex=8, sizey=10;
for(posx=x;posx<x+sizex;posx++)
for(posy=y;posy<y+sizey;posy++)
{
if(deffont[fnt].line[posy-y]&1<<(7-(posx-x)))
{
PutPixel(posx,posy,color);
}
else
{
PutPixel(posx,posy,0);
}
}
}
void PutString(char *str, int x,int y, int color)
{
int i=x;
while((*str)!=0)
{
PutFont(*str, i,y, color);
i+=9; // spacing
str++;
}
}
|
