ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: /os/sa1110/softcursor.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include "io.h"
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "gscreen.h"
/*
* Software cursor code: done by hand, might be better to use memimagedraw
* but that would need to be done by a process
*/
typedef struct Cursordata Cursordata;
struct Cursordata {
Physdisplay *vd;
ulong *fb; /* screen frame buffer */
Rectangle r;
int depth; /* depth of screen */
int width; /* width of screen in ulongs */
int x;
int y;
int hotx;
int hoty;
int cbwid; /* cursor byte width */
int f; /* flags */
int dx;
int dy;
int hidecount;
uchar data[CURSWID*CURSHGT];
uchar mask[CURSWID*CURSHGT];
uchar save[CURSWID*CURSHGT];
};
static Cursordata *cd = nil;
enum {
Enabled = 0x01, /* cursor is enabled */
Drawn = 0x02, /* cursor is currently drawn */
Bitswap = 0x10,
};
static Rectangle cursoroffrect;
static int cursorisoff;
static void swcursorflush(Point);
static void swcurs_draw_or_undraw(Cursordata *);
static void
cursorupdate0(void)
{
int inrect, x, y;
Point m;
m = mousexy();
x = m.x - cd->hotx;
y = m.y - cd->hoty;
inrect = (x >= cursoroffrect.min.x && x < cursoroffrect.max.x
&& y >= cursoroffrect.min.y && y < cursoroffrect.max.y);
if (cursorisoff == inrect)
return;
cursorisoff = inrect;
if (inrect)
swcurs_hide(swc);
else {
cd->hidecount = 0;
swcurs_draw_or_undraw(swc);
}
swcursorflush(m);
}
void
cursorupdate(Rectangle r)
{
lock(vd);
r.min.x -= 16;
r.min.y -= 16;
cursoroffrect = r;
if (vd->cursor != nil)
cursorupdate0();
unlock(vd);
}
void
cursorenable(void)
{
lock(vd);
if(vd->cursor != nil)
vd->cursor->enable(swc);
// swcursorflush(mousexy());
unlock(vd);
}
void
cursordisable(void)
{
lock(vd);
if(swc != nil) {
swcurs_disable(swc);
swcursorflush(mousexy());
}
unlock(vd);
}
static void
swcursupdate(int oldx, int oldy, int x, int y)
{
if(!canlock(vd))
return; /* if can't lock, don't wake up stuff */
if(x < gscreen->r.min.x)
x = gscreen->r.min.x;
if(x >= gscreen->r.max.x)
x = gscreen->r.max.x;
if(y < gscreen->r.min.y)
y = gscreen->r.min.y;
if(y >= gscreen->r.max.y)
y = gscreen->r.max.y;
if(swc != nil) {
swcurs_hide(swc);
cd->x = x;
cd->y = y;
cursorupdate0();
swcurs_unhide(swc);
swcursorflush(oldx, oldy);
swcursorflush(x, y);
}
unlock(vd);
}
void
drawcursor(Drawcursor* c)
{
Point p;
Cursor curs, *cp;
int j, i, h, bpl;
uchar *bc, *bs, *cclr, *cset;
if(swc == nil)
return;
/* Set the default system cursor */
if(c == nil || c->data == nil){
swcurs_disable(swc);
return;
}
else {
cp = &curs;
p.x = c->hotx;
p.y = c->hoty;
cp->offset = p;
bpl = bytesperline(Rect(c->minx, c->miny, c->maxx, c->maxy), 1);
h = (c->maxy-c->miny)/2;
if(h > 16)
h = 16;
bc = c->data;
bs = c->data + h*bpl;
cclr = cp->clr;
cset = cp->set;
for(i = 0; i < h; i++) {
for(j = 0; j < 2; j++) {
cclr[j] = bc[j];
cset[j] = bs[j];
}
bc += bpl;
bs += bpl;
cclr += 2;
cset += 2;
}
}
swcurs_load(swc, cp);
swcursorflush(mousexy());
swcurs_enable(swc);
}
void*
create(Physdisplay *vd)
{
Cursordata *cd;
swc = (Cursordata*)malloc(sizeof(Cursordata));
cd->vd = vd;
cd->fb = vd->gscreen->data->bdata; /* or vd->fb? */
cd->r = vd->gscreen->r;
cd->d = vd->gscreen->depth;
cd->width = vd->gscreen->width;
// cd->f = bitswap ? Bitswap : 0;
cd->f = Bitswap; /* ??? */
cd->x = cd->y = 0;
cd->hotx = cd->hoty = 0;
cd->hidecount = 0;
return cd;
}
void
swcurs_destroy(Cursordata *cd)
{
swcurs_disable(cd);
free(cd);
}
static void
swcursorflush(Point p)
{
Rectangle r;
/* XXX a little too paranoid here */
r.min.x = p.x-16;
r.min.y = p.y-16;
r.max.x = p.x+17;
r.max.y = p.y+17;
flushmemscreen(r);
}
static void
swcurs_draw_or_undraw(Cursordata *cd)
{
uchar *p;
uchar *cs;
int w, vw;
int x1 = cd->r.min.x;
int y1 = cd->r.min.y;
int x2 = cd->r.max.x;
int y2 = cd->r.max.y;
int xp = cd->x - cd->hotx;
int yp = cd->y - cd->hoty;
int ofs;
if(((cd->f & Enabled) && (cd->hidecount <= 0))
== ((cd->f & Drawn) != 0))
return;
w = cd->cbwid*BI2BY/cd->depth;
x1 = xp < x1 ? x1 : xp;
y1 = yp < y1 ? y1 : yp;
x2 = xp+w >= x2 ? x2 : xp+w;
y2 = yp+cd->dy >= y2 ? y2 : yp+cd->dy;
if(x2 <= x1 || y2 <= y1)
return;
p = (uchar*)(cd->fb + cd->width*y1) + x1*(1 << cd->d)/BI2BY;
y2 -= y1;
x2 = (x2-x1)*cd->depth/BI2BY;
vw = cd->width*BY2WD - x2;
w = cd->cbwid - x2;
ofs = cd->cbwid*(y1-yp)+(x1-xp);
cs = cd->save + ofs;
if((cd->f ^= Drawn) & Drawn) {
uchar *cm = cd->mask + ofs;
uchar *cd = cd->data + ofs;
while(y2--) {
x1 = x2;
while(x1--) {
*cs++ = *p;
*p = (*p & *cm++) ^ *cd++;
p++;
}
cs += w;
cm += w;
cd += w;
p += vw;
}
} else {
while(--y2 >= 0){
for(x1 = x2; --x1 >= 0;)
*p++ = *cs++;
cs += w;
p += vw;
}
}
}
static void
swcurs_hide(Cursordata *cd)
{
++cd->hidecount;
swcurs_draw_or_undraw(swc);
}
static void
swcurs_unhide(Cursordata *cd)
{
if (--cd->hidecount < 0)
cd->hidecount = 0;
swcurs_draw_or_undraw(swc);
}
static void
swcurs_enable(Cursordata *cd)
{
cd->f |= Enabled;
swcurs_draw_or_undraw(swc);
}
void
swcurs_disable(Cursordata *cd)
{
cd->f &= ~Enabled;
swcurs_draw_or_undraw(swc);
}
static void
load(Cursordata *cd, Cursor *c)
{
int i, k;
uchar *bc, *bs, *cd, *cm;
static uchar bdv[4] = {0,Backgnd,Foregnd,0xff};
static uchar bmv[4] = {0xff,0,0,0xff};
int bits = 1<<cd->depth;
uchar mask = (1<<bits)-1;
int bswp = (cd->f&Bitswap) ? 8-bits : 0;
bc = c->clr;
bs = c->set;
swcurs_hide(swc);
cd = cd->data;
cm = cd->mask;
cd->hotx = c->offset.x;
cd->hoty = c->offset.y;
cd->dy = CURSHGT;
cd->dx = CURSWID;
cd->cbwid = CURSWID*(1<<cd->d)/BI2BY;
for(i = 0; i < CURSWID/BI2BY*CURSHGT; i++) {
uchar bcb = *bc++;
uchar bsb = *bs++;
for(k=0; k<BI2BY;) {
uchar cdv = 0;
uchar cmv = 0;
int z;
for(z=0; z<BI2BY; z += bits) {
int n = ((bsb&(0x80))|((bcb&(0x80))<<1))>>7;
int s = z^bswp;
cdv |= (bdv[n]&mask) << s;
cmv |= (bmv[n]&mask) << s;
bcb <<= 1;
bsb <<= 1;
k++;
}
*cd++ = cdv;
*cm++ = cmv;
}
}
swcurs_unhide(swc);
}
Physcursor softcursor = {
.name = "softcursor",
.create = create,
.enable = swenable,
.disable = swdisable,
.load = load,
.move = move,
.destroy = destroy,
};