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#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#define Image IMAGE
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
static void
ct65545page(VGAscr*, int page)
{
outb(0x3D6, 0x10);
outb(0x3D7, page<<6);
}
static void
ct65545disable(VGAscr*)
{
outl(0xA3D0, 0);
}
static void
ct65545enable(VGAscr* scr)
{
ulong storage;
/*
* Find a place for the cursor data in display memory.
* Must be on a 1024-byte boundary.
*/
storage = ROUND(scr->gscreen->width*BY2WD*scr->gscreen->r.max.y, 1024);
outl(0xB3D0, storage);
scr->storage = storage;
/*
* Set the colours.
* Enable the cursor.
*/
outl(0xA7D0, 0xFFFF0000);
outl(0xA3D0, 2);
}
static void
ct65545initcursor(VGAscr* scr, int xo, int yo, int index)
{
uchar *mem;
uint and, clr, set, xor;
int i, x, y;
mem = scr->vaddr;
mem += scr->storage + index*1024;
for(y = yo; y < 16; y++){
clr = (scr->clr[2*y]<<8)|scr->clr[2*y+1];
set = (scr->set[2*y]<<8)|scr->set[2*y+1];
if(xo){
clr <<= xo;
set <<= xo;
}
and = 0;
xor = 0;
for(i = 0; i < 16; i++){
if(set & (1<<i)){
/* nothing to do */
}
else if(clr & (1<<i))
xor |= 1<<i;
else
and |= 1<<i;
}
*mem++ = and>>8;
*mem++ = xor>>8;
*mem++ = and;
*mem++ = xor;
for(x = 16; x < 64; x += 8){
*mem++ = 0xFF;
*mem++ = 0x00;
}
}
while(y < 64+yo){
for(x = 0; x < 64; x += 8){
*mem++ = 0xFF;
*mem++ = 0x00;
}
y++;
}
}
static void
ct65545load(VGAscr* scr, Cursor* curs)
{
memmove(&scr->Cursor, curs, sizeof(Cursor));
ct65545initcursor(scr, 0, 0, 0);
}
static int
ct65545move(VGAscr* scr, Point p)
{
int index, x, xo, y, yo;
index = 0;
if((x = p.x+scr->offset.x) < 0){
xo = -x;
x = 0;
}
else
xo = 0;
if((y = p.y+scr->offset.y) < 0){
yo = -y;
y = 0;
}
else
yo = 0;
if(xo || yo){
ct65545initcursor(scr, xo, yo, 1);
index = 1;
}
outl(0xB3D0, scr->storage + index*1024);
outl(0xAFD0, (y<<16)|x);
return 0;
}
VGAdev vgact65545dev = {
"ct65540", /* BUG: really 65545 */
0,
0,
ct65545page,
0,
};
VGAcur vgact65545cur = {
"ct65545hwgc",
ct65545enable,
ct65545disable,
ct65545load,
ct65545move,
};
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