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