#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#include <libg.h>
#include <gnot.h>
#include "screen.h"
#include "vga.h"
/*
* CGA-only hack.
*/
/* imported */
extern GSubfont defont0;
extern Cursor arrow;
extern GBitmap cursorback;
/* exported */
GSubfont *defont;
int islittle = 1; /* little endian bit ordering in bytes */
GBitmap gscreen;
/* local */
static Lock vgalock;
static ulong colormap[256][3];
static Rectangle mbb;
/*
* reverse pixels into little endian order
*/
uchar revtab0[] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
};
uchar revtab1[] = {
0x00, 0x40, 0x80, 0xc0, 0x10, 0x50, 0x90, 0xd0,
0x20, 0x60, 0xa0, 0xe0, 0x30, 0x70, 0xb0, 0xf0,
0x04, 0x44, 0x84, 0xc4, 0x14, 0x54, 0x94, 0xd4,
0x24, 0x64, 0xa4, 0xe4, 0x34, 0x74, 0xb4, 0xf4,
0x08, 0x48, 0x88, 0xc8, 0x18, 0x58, 0x98, 0xd8,
0x28, 0x68, 0xa8, 0xe8, 0x38, 0x78, 0xb8, 0xf8,
0x0c, 0x4c, 0x8c, 0xcc, 0x1c, 0x5c, 0x9c, 0xdc,
0x2c, 0x6c, 0xac, 0xec, 0x3c, 0x7c, 0xbc, 0xfc,
0x01, 0x41, 0x81, 0xc1, 0x11, 0x51, 0x91, 0xd1,
0x21, 0x61, 0xa1, 0xe1, 0x31, 0x71, 0xb1, 0xf1,
0x05, 0x45, 0x85, 0xc5, 0x15, 0x55, 0x95, 0xd5,
0x25, 0x65, 0xa5, 0xe5, 0x35, 0x75, 0xb5, 0xf5,
0x09, 0x49, 0x89, 0xc9, 0x19, 0x59, 0x99, 0xd9,
0x29, 0x69, 0xa9, 0xe9, 0x39, 0x79, 0xb9, 0xf9,
0x0d, 0x4d, 0x8d, 0xcd, 0x1d, 0x5d, 0x9d, 0xdd,
0x2d, 0x6d, 0xad, 0xed, 0x3d, 0x7d, 0xbd, 0xfd,
0x02, 0x42, 0x82, 0xc2, 0x12, 0x52, 0x92, 0xd2,
0x22, 0x62, 0xa2, 0xe2, 0x32, 0x72, 0xb2, 0xf2,
0x06, 0x46, 0x86, 0xc6, 0x16, 0x56, 0x96, 0xd6,
0x26, 0x66, 0xa6, 0xe6, 0x36, 0x76, 0xb6, 0xf6,
0x0a, 0x4a, 0x8a, 0xca, 0x1a, 0x5a, 0x9a, 0xda,
0x2a, 0x6a, 0xaa, 0xea, 0x3a, 0x7a, 0xba, 0xfa,
0x0e, 0x4e, 0x8e, 0xce, 0x1e, 0x5e, 0x9e, 0xde,
0x2e, 0x6e, 0xae, 0xee, 0x3e, 0x7e, 0xbe, 0xfe,
0x03, 0x43, 0x83, 0xc3, 0x13, 0x53, 0x93, 0xd3,
0x23, 0x63, 0xa3, 0xe3, 0x33, 0x73, 0xb3, 0xf3,
0x07, 0x47, 0x87, 0xc7, 0x17, 0x57, 0x97, 0xd7,
0x27, 0x67, 0xa7, 0xe7, 0x37, 0x77, 0xb7, 0xf7,
0x0b, 0x4b, 0x8b, 0xcb, 0x1b, 0x5b, 0x9b, 0xdb,
0x2b, 0x6b, 0xab, 0xeb, 0x3b, 0x7b, 0xbb, 0xfb,
0x0f, 0x4f, 0x8f, 0xcf, 0x1f, 0x5f, 0x9f, 0xdf,
0x2f, 0x6f, 0xaf, 0xef, 0x3f, 0x7f, 0xbf, 0xff,
};
uchar revtab2[] = {
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
0x80, 0x90, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0,
0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
0x81, 0x91, 0xa1, 0xb1, 0xc1, 0xd1, 0xe1, 0xf1,
0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
0x82, 0x92, 0xa2, 0xb2, 0xc2, 0xd2, 0xe2, 0xf2,
0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,
0x83, 0x93, 0xa3, 0xb3, 0xc3, 0xd3, 0xe3, 0xf3,
0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,
0x84, 0x94, 0xa4, 0xb4, 0xc4, 0xd4, 0xe4, 0xf4,
0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,
0x85, 0x95, 0xa5, 0xb5, 0xc5, 0xd5, 0xe5, 0xf5,
0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,
0x86, 0x96, 0xa6, 0xb6, 0xc6, 0xd6, 0xe6, 0xf6,
0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,
0x87, 0x97, 0xa7, 0xb7, 0xc7, 0xd7, 0xe7, 0xf7,
0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,
0x88, 0x98, 0xa8, 0xb8, 0xc8, 0xd8, 0xe8, 0xf8,
0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,
0x89, 0x99, 0xa9, 0xb9, 0xc9, 0xd9, 0xe9, 0xf9,
0x0a, 0x1a, 0x2a, 0x3a, 0x4a, 0x5a, 0x6a, 0x7a,
0x8a, 0x9a, 0xaa, 0xba, 0xca, 0xda, 0xea, 0xfa,
0x0b, 0x1b, 0x2b, 0x3b, 0x4b, 0x5b, 0x6b, 0x7b,
0x8b, 0x9b, 0xab, 0xbb, 0xcb, 0xdb, 0xeb, 0xfb,
0x0c, 0x1c, 0x2c, 0x3c, 0x4c, 0x5c, 0x6c, 0x7c,
0x8c, 0x9c, 0xac, 0xbc, 0xcc, 0xdc, 0xec, 0xfc,
0x0d, 0x1d, 0x2d, 0x3d, 0x4d, 0x5d, 0x6d, 0x7d,
0x8d, 0x9d, 0xad, 0xbd, 0xcd, 0xdd, 0xed, 0xfd,
0x0e, 0x1e, 0x2e, 0x3e, 0x4e, 0x5e, 0x6e, 0x7e,
0x8e, 0x9e, 0xae, 0xbe, 0xce, 0xde, 0xee, 0xfe,
0x0f, 0x1f, 0x2f, 0x3f, 0x4f, 0x5f, 0x6f, 0x7f,
0x8f, 0x9f, 0xaf, 0xbf, 0xcf, 0xdf, 0xef, 0xff,
};
void
pixreverse(uchar *p, int len, int ldepth)
{
uchar *e;
uchar *tab;
switch(ldepth){
case 0:
tab = revtab0;
break;
case 1:
tab = revtab1;
break;
case 2:
tab = revtab2;
break;
default:
return;
}
for(e = p + len; p < e; p++)
*p = tab[*p];
}
static void
crout(int reg, int val)
{
outb(CRX, reg);
outb(CR, val);
}
void
screeninit(void)
{
int i;
ulong *l;
/*
* arrow is defined as a big endian
*/
pixreverse(arrow.set, 2*16, 0);
pixreverse(arrow.clr, 2*16, 0);
/*
* swizzle the font longs. we do both byte and bit swizzling
* since the font is initialized with big endian longs.
*/
defont = &defont0;
l = defont->bits->base;
for(i = defont->bits->width*Dy(defont->bits->r); i > 0; i--, l++)
*l = (*l<<24) | ((*l>>8)&0x0000ff00) | ((*l<<8)&0x00ff0000) | (*l>>24);
pixreverse((uchar*)defont->bits->base,
defont->bits->width*BY2WD*Dy(defont->bits->r), 0);
crout(0x0a, 0xff); /* turn off cursor */
memset(CGASCREEN, 0, CGAWIDTH*CGAHEIGHT);
}
static void
cgascreenputc(int c)
{
int i;
static int color;
static int pos;
if(c == '\n'){
pos = pos/CGAWIDTH;
pos = (pos+1)*CGAWIDTH;
} else if(c == '\t'){
i = 8 - ((pos/2)&7);
while(i-->0)
cgascreenputc(' ');
} else if(c == '\b'){
if(pos >= 2)
pos -= 2;
cgascreenputc(' ');
pos -= 2;
} else {
CGASCREEN[pos++] = c;
CGASCREEN[pos++] = 2; /* green on black */
}
if(pos >= CGAWIDTH*CGAHEIGHT){
memmove(CGASCREEN, &CGASCREEN[CGAWIDTH], CGAWIDTH*(CGAHEIGHT-1));
memset(&CGASCREEN[CGAWIDTH*(CGAHEIGHT-1)], 0, CGAWIDTH);
pos = CGAWIDTH*(CGAHEIGHT-1);
}
}
void
screenputs(char *s, int n)
{
while(n-- > 0)
cgascreenputc(*s++);
}
/*
* collect changes to the 'soft' screen
*/
void
mbbrect(Rectangle r)
{
if (r.min.x < mbb.min.x)
mbb.min.x = r.min.x;
if (r.min.y < mbb.min.y)
mbb.min.y = r.min.y;
if (r.max.x > mbb.max.x)
mbb.max.x = r.max.x;
if (r.max.y > mbb.max.y)
mbb.max.y = r.max.y;
mousescreenupdate();
}
void
hwcursset(ulong *s, ulong *c, int ox, int oy)
{
USED(s, c, ox, oy);
}
void
hwcursmove(int x, int y)
{
USED(x, y);
}
void
screenload(Rectangle r, uchar *data, int tl, int l)
{
USED(r, data, tl, l);
}
void
getcolor(ulong p, ulong *pr, ulong *pg, ulong *pb)
{
p &= (1<<(1<<gscreen.ldepth))-1;
lock(&vgalock);
*pr = colormap[p][0];
*pg = colormap[p][1];
*pb = colormap[p][2];
unlock(&vgalock);
}
void
mousescreenupdate(void)
{
}
/*
* a fatter than usual cursor for the safari
*/
Cursor fatarrow = {
{ -1, -1 },
{
0xff, 0xff, 0x80, 0x01, 0x80, 0x02, 0x80, 0x0c,
0x80, 0x10, 0x80, 0x10, 0x80, 0x08, 0x80, 0x04,
0x80, 0x02, 0x80, 0x01, 0x80, 0x02, 0x8c, 0x04,
0x92, 0x08, 0x91, 0x10, 0xa0, 0xa0, 0xc0, 0x40,
},
{
0x00, 0x00, 0x7f, 0xfe, 0x7f, 0xfc, 0x7f, 0xf0,
0x7f, 0xe0, 0x7f, 0xe0, 0x7f, 0xf0, 0x7f, 0xf8,
0x7f, 0xfc, 0x7f, 0xfe, 0x7f, 0xfc, 0x73, 0xf8,
0x61, 0xf0, 0x60, 0xe0, 0x40, 0x40, 0x00, 0x00,
},
};
void
bigcursor(void)
{
memmove(&arrow, &fatarrow, sizeof(fatarrow));
pixreverse(arrow.set, 2*16, 0);
pixreverse(arrow.clr, 2*16, 0);
}