ref: a411870ee4640241e3c494367d922847da84f972
dir: purgatorio/os/pc/screen.c
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "ureg.h"
#include "../port/error.h"
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
#define RGB2K(r,g,b) ((156763*(r)+307758*(g)+59769*(b))>>19)
Point ZP = {0, 0};
Rectangle physgscreenr;
Cursorinfo cursor; /* TO DO */
Memdata gscreendata;
Memimage *gscreen;
VGAscr vgascreen[1];
Cursor arrow = {
{ -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,
},
};
int
screensize(int x, int y, int z, ulong chan)
{
VGAscr *scr;
memimageinit();
scr = &vgascreen[0];
/*
* BUG: need to check if any xalloc'ed memory needs to
* be given back if aperture is set.
*/
if(scr->aperture == 0){
int width = (x*z)/BI2WD;
gscreendata.bdata = xalloc(width*BY2WD*y);
if(gscreendata.bdata == 0)
error("screensize: vga soft memory");
/* memset(gscreendata.bdata, 0x72, width*BY2WD*y); /* not really black */
scr->useflush = 1;
scr->aperture = VGAMEM();
scr->apsize = 1<<16;
}
else
gscreendata.bdata = KADDR(scr->aperture);
if(gscreen)
freememimage(gscreen);
gscreen = allocmemimaged(Rect(0,0,x,y), chan, &gscreendata);
vgaimageinit(chan);
if(gscreen == nil)
return -1;
if(scr->dev && scr->dev->flush)
scr->useflush = 1;
scr->palettedepth = 6; /* default */
scr->gscreendata = &gscreendata;
scr->memdefont = getmemdefont();
scr->gscreen = gscreen;
physgscreenr = gscreen->r;
drawcmap();
return 0;
}
int
screenaperture(int size, int align)
{
VGAscr *scr;
ulong aperture;
scr = &vgascreen[0];
if(size == 0){
if(scr->aperture && scr->isupamem)
upafree(scr->aperture, scr->apsize);
scr->aperture = 0;
scr->isupamem = 0;
return 0;
}
if(scr->dev && scr->dev->linear){
aperture = scr->dev->linear(scr, &size, &align);
if(aperture == 0)
return 1;
}else{
aperture = upamalloc(0, size, align);
if(aperture == 0)
return 1;
if(scr->aperture && scr->isupamem)
upafree(scr->aperture, scr->apsize);
scr->isupamem = 1;
}
scr->aperture = aperture;
scr->apsize = size;
return 0;
}
uchar*
attachscreen(Rectangle* r, ulong* chan, int* d, int* width, int *softscreen)
{
VGAscr *scr;
scr = &vgascreen[0];
if(scr->gscreen == nil || scr->gscreendata == nil)
return nil;
*r = scr->gscreen->clipr;
*chan = scr->gscreen->chan;
*d = scr->gscreen->depth;
*width = scr->gscreen->width;
*softscreen = scr->useflush;
return scr->gscreendata->bdata;
}
/*
* It would be fair to say that this doesn't work for >8-bit screens.
*/
void
flushmemscreen(Rectangle r)
{
VGAscr *scr;
uchar *sp, *disp, *sdisp, *edisp;
int y, len, incs, off, page;
scr = &vgascreen[0];
if(scr->dev && scr->dev->flush){
scr->dev->flush(scr, r);
return;
}
if(scr->gscreen == nil || scr->useflush == 0)
return;
if(scr->dev == nil || scr->dev->page == nil)
return;
if(rectclip(&r, scr->gscreen->r) == 0)
return;
incs = scr->gscreen->width * BY2WD;
switch(scr->gscreen->depth){
default:
len = 0;
panic("flushmemscreen: depth\n");
break;
case 8:
len = Dx(r);
break;
}
if(len < 1)
return;
off = r.min.y*scr->gscreen->width*BY2WD+(r.min.x*scr->gscreen->depth)/8;
page = off/scr->apsize;
off %= scr->apsize;
disp = KADDR(scr->aperture);
sdisp = disp+off;
edisp = disp+scr->apsize;
off = r.min.y*scr->gscreen->width*BY2WD+(r.min.x*scr->gscreen->depth)/8;
sp = scr->gscreendata->bdata + off;
scr->dev->page(scr, page);
for(y = r.min.y; y < r.max.y; y++) {
if(sdisp + incs < edisp) {
memmove(sdisp, sp, len);
sp += incs;
sdisp += incs;
}
else {
off = edisp - sdisp;
page++;
if(off <= len){
if(off > 0)
memmove(sdisp, sp, off);
scr->dev->page(scr, page);
if(len - off > 0)
memmove(disp, sp+off, len - off);
}
else {
memmove(sdisp, sp, len);
scr->dev->page(scr, page);
}
sp += incs;
sdisp += incs - scr->apsize;
}
}
}
void
getcolor(ulong p, ulong* pr, ulong* pg, ulong* pb)
{
VGAscr *scr;
ulong x;
scr = &vgascreen[0];
if(scr->gscreen == nil)
return;
switch(scr->gscreen->depth){
default:
x = 0x0F;
break;
case 8:
x = 0xFF;
break;
}
p &= x;
lock(&cursor);
*pr = scr->colormap[p][0];
*pg = scr->colormap[p][1];
*pb = scr->colormap[p][2];
unlock(&cursor);
}
int
setpalette(ulong p, ulong r, ulong g, ulong b)
{
VGAscr *scr;
int d;
scr = &vgascreen[0];
d = scr->palettedepth;
lock(&cursor);
scr->colormap[p][0] = r;
scr->colormap[p][1] = g;
scr->colormap[p][2] = b;
vgao(PaddrW, p);
vgao(Pdata, r>>(32-d));
vgao(Pdata, g>>(32-d));
vgao(Pdata, b>>(32-d));
unlock(&cursor);
return ~0;
}
/*
* On some video cards (e.g. Mach64), the palette is used as the
* DAC registers for >8-bit modes. We don't want to set them when the user
* is trying to set a colormap and the card is in one of these modes.
*/
int
setcolor(ulong p, ulong r, ulong g, ulong b)
{
VGAscr *scr;
int x;
scr = &vgascreen[0];
if(scr->gscreen == nil)
return 0;
switch(scr->gscreen->depth){
case 1:
case 2:
case 4:
x = 0x0F;
break;
case 8:
x = 0xFF;
break;
default:
return 0;
}
p &= x;
return setpalette(p, r, g, b);
}
int
cursoron(int dolock)
{
VGAscr *scr;
int v;
scr = &vgascreen[0];
if(scr->cur == nil || scr->cur->move == nil)
return 0;
if(dolock)
lock(&cursor);
v = scr->cur->move(scr, mousexy());
if(dolock)
unlock(&cursor);
return v;
}
void
cursoroff(int)
{
}
void
setcursor(Cursor* curs)
{
VGAscr *scr;
scr = &vgascreen[0];
if(scr->cur == nil || scr->cur->load == nil)
return;
scr->cur->load(scr, curs);
}
int hwaccel = 1;
int hwblank = 0; /* turned on by drivers that are known good */
int panning = 0;
int
hwdraw(Memdrawparam *par)
{
VGAscr *scr;
Memimage *dst, *src;
int m;
if(hwaccel == 0)
return 0;
dst = par->dst;
scr = &vgascreen[0];
if(dst == nil || dst->data == nil)
return 0;
if(dst->data->bdata != gscreendata.bdata)
return 0;
if(scr->fill==nil && scr->scroll==nil)
return 0;
/*
* If we have an opaque mask and source is one opaque
* pixel we can convert to the destination format and just
* replicate with memset.
*/
m = Simplesrc|Simplemask|Fullmask;
if(scr->fill
&& (par->state&m)==m
&& ((par->srgba&0xFF) == 0xFF)
&& (par->op&S) == S)
return scr->fill(scr, par->r, par->sdval);
/*
* If no source alpha, an opaque mask, we can just copy the
* source onto the destination. If the channels are the same and
* the source is not replicated, memmove suffices.
*/
m = Simplemask|Fullmask;
src = par->src;
if(scr->scroll
&& src->data->bdata==dst->data->bdata
&& !(src->flags&Falpha)
&& (par->state&m)==m
&& (par->op&S) == S)
return scr->scroll(scr, par->r, par->sr);
return 0;
}
void
blankscreen(int blank)
{
VGAscr *scr;
scr = &vgascreen[0];
if(hwblank){
if(scr->blank)
scr->blank(scr, blank);
else
vgablank(scr, blank);
}
}
void
cursorenable(void)
{
}
void
cursordisable(void)
{
}