ref: eb7621a5aef227bd912814ef24def5c9a272156f
dir: /drw.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include "dat.h"
#include "fns.h"
extern QLock drawlock;
int scale = 1;
static Point p0, pan;
static int fbsz, fbh, fbw, fbws;
static u32int *fb, *fbvis;
static Image *fbi;
static Rectangle selr;
static Point panmax;
static Mobj *selected[Nselect];
static Mobj **visbuf;
static int nvisbuf, nvis;
enum{
DLgndshad,
DLgnd,
DLgndglow,
DLairshad,
DLair,
DLairglow,
DLend,
};
typedef struct Drawlist Drawlist;
struct Drawlist{
Mobj **mo;
Pic **pics;
int n;
int sz;
int noalpha;
};
static Drawlist drawlist[DLend] = {
[DLgnd] {.noalpha 1},
[DLair] {.noalpha 1},
};
void
dopan(Point p)
{
pan.x -= p.x;
pan.y -= p.y;
if(pan.x < 0)
pan.x = 0;
else if(pan.x > panmax.x)
pan.x = panmax.x;
if(pan.y < 0)
pan.y = 0;
else if(pan.y > panmax.y)
pan.y = panmax.y;
}
void
select(Point p)
{
int i;
if(!ptinrect(p, selr))
return;
p = divpt(subpt(p, selr.min), scale);
i = fbvis[p.y * fbw + p.x];
selected[0] = i == -1 ? nil : visbuf[i];
}
void
move(Point p)
{
int i;
Point vp;
Mobj *mo;
if(!ptinrect(p, selr) || selected[0] == nil)
return;
vp = divpt(subpt(p, selr.min), scale);
i = fbvis[vp.y * fbw + vp.x];
mo = i == -1 ? nil : visbuf[i];
if(mo == selected[0]){
dprint("select: %#p not moving to itself\n", visbuf[i]);
return;
}
p = divpt(addpt(subpt(p, selr.min), pan), scale);
p.x /= Nodewidth;
p.y /= Nodeheight;
if(mo != nil)
sendmovenear(selected[0], p, mo);
else
sendmove(selected[0], p);
}
static void
drawhud(void)
{
char s[256];
Mobj *mo;
draw(screen, Rpt(p0, screen->r.max), display->black, nil, ZP);
mo = selected[0];
if(mo == nil)
return;
snprint(s, sizeof s, "%s %d/%d", mo->o->name, mo->hp, mo->o->hp);
string(screen, p0, display->white, ZP, font, s);
}
static int
addvis(Mobj *mo)
{
int i;
if((i = nvis++) >= nvisbuf){
visbuf = erealloc(visbuf, (nvisbuf + 16) * sizeof *visbuf,
nvisbuf * sizeof *visbuf);
nvisbuf += 16;
}
visbuf[i] = mo;
return i;
}
static void
clearvis(void)
{
if(visbuf != nil)
memset(visbuf, 0, nvisbuf * sizeof *visbuf);
nvis = 0;
}
static int
boundpic(Rectangle *r, u32int **q)
{
int w;
r->min.x -= pan.x / scale;
r->min.y -= pan.y / scale;
if(r->min.x + r->max.x < 0 || r->min.x >= fbw
|| r->min.y + r->max.y < 0 || r->min.y >= fbh)
return -1;
w = r->max.x;
if(r->min.x < 0){
if(q != nil)
*q -= r->min.x;
r->max.x += r->min.x;
r->min.x = 0;
}
if(r->min.x + r->max.x > fbw)
r->max.x -= r->min.x + r->max.x - fbw;
if(r->min.y < 0){
if(q != nil)
*q -= w * r->min.y;
r->max.y += r->min.y;
r->min.y = 0;
}
if(r->min.y + r->max.y > fbh)
r->max.y -= r->min.y + r->max.y - fbh;
r->min.x *= scale;
r->max.x *= scale;
return 0;
}
static void
drawpic(int x, int y, Pic *pic, int ivis)
{
int n, Δp, Δsp, Δq;
u32int v, *p, *e, *sp, *q;
Rectangle r;
if(pic->p == nil)
sysfatal("drawpic: empty pic");
q = pic->p;
r = Rect(x + pic->dx, y + pic->dy, pic->w, pic->h);
if(boundpic(&r, &q) < 0)
return;
Δq = pic->w - r.max.x / scale;
p = fb + r.min.y * fbws + r.min.x;
Δp = fbws - r.max.x;
sp = fbvis + r.min.y * fbw + r.min.x / scale;
Δsp = fbw - r.max.x / scale;
while(r.max.y-- > 0){
e = p + r.max.x;
while(p < e){
v = *q++;
if(v & 0xff << 24){
for(n=0; n<scale; n++)
*p++ = v;
}else
p += scale;
*sp++ = ivis;
}
q += Δq;
p += Δp;
sp += Δsp;
}
}
static void
drawpicalpha(int x, int y, Pic *pic)
{
int n, Δp, Δq;
u8int k, a, b;
u32int o, A, B, *p, *e, *q;
Rectangle r;
if(pic->p == nil)
sysfatal("drawpic: empty pic");
q = pic->p;
r = Rect(x + pic->dx, y + pic->dy, pic->w, pic->h);
if(boundpic(&r, &q) < 0)
return;
Δq = pic->w - r.max.x / scale;
p = fb + r.min.y * fbws + r.min.x;
Δp = fbws - r.max.x;
while(r.max.y-- > 0){
e = p + r.max.x;
while(p < e){
A = *q++;
k = A >> 24;
B = *p;
for(n=0; n<24; n+=8){
a = A >> n;
b = B >> n;
o = k * (a - b);
o = (o + 1 + (o >> 8)) >> 8;
B = B & ~(0xff << n) | (o + b & 0xff) << n;
}
for(n=0; n<scale; n++)
*p++ = B;
}
q += Δq;
p += Δp;
}
}
void
compose(int x, int y, u32int c)
{
int n, Δp;
u32int v, *p, *e;
Rectangle r;
r = Rect(x * Nodewidth, y * Nodeheight, Nodewidth, Nodeheight);
if(boundpic(&r, nil) < 0)
return;
p = fb + r.min.y * fbws + r.min.x;
Δp = fbws - r.max.x;
while(r.max.y-- > 0){
e = p + r.max.x;
while(p < e){
v = *p;
v = (v & 0xff0000) + (c & 0xff0000) >> 1 & 0xff0000
| (v & 0xff00) + (c & 0xff00) >> 1 & 0xff00
| (v & 0xff) + (c & 0xff) >> 1 & 0xff;
for(n=0; n<scale; n++)
*p++ = v;
}
p += Δp;
}
}
static void
drawmap(Rectangle r)
{
int x, y;
u64int *row, v, m;
Node *n;
Mobj *mo;
Point *p;
r = Rpt(mulpt(r.min, Node2Tile), mulpt(r.max, Node2Tile));
for(y=r.min.y, n=nodemap+y*nodemapwidth+r.min.x; y<r.max.y; y++){
x = r.min.x;
row = baddr(x, y);
v = *row++;
m = 1ULL << 63 - (x & Bmask);
for(; x<r.max.x; x++, n++, m>>=1){
if(m == 0){
v = *row++;
m = 1ULL << 63;
}
if(v & m)
compose(x, y, 0xff0000);
if(n->closed)
compose(x, y, 0x0000ff);
else if(n->open)
compose(x, y, 0xffff00);
}
n += nodemapwidth - (r.max.x - r.min.x);
}
if((mo = selected[0]) != nil && mo->pathp != nil){
for(p=mo->paths; p<mo->pathe; p++)
compose(p->x / Nodewidth, p->y / Nodeheight, 0x00ff00);
compose(mo->target.x, mo->target.y, 0x00ffff);
}
}
static Pic *
frm(Mobj *mo, int type)
{
static int rot17[Nrot] = {
0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,
9,9,10,10,11,11,12,12,13,13,14,14,15,15,16
};
int θ, frm;
Pics *pp;
Pic *p;
pp = &mo->o->pics[mo->state][type];
if(pp->pic == nil)
return nil;
frm = pp->iscopy ? mo->freezefrm : tc % pp->nf;
θ = mo->θ * 32.0 / 256;
switch(pp->nr){
case 17: θ = rot17[θ]; break;
default: θ = 0; break;
}
p = pp->pic[frm];
if(pp->teamcol)
p += nteam * θ + mo->team - 1;
else
p += θ;
return p;
}
static void
clearlists(void)
{
Drawlist *dl;
for(dl=drawlist; dl<drawlist+DLend; dl++)
dl->n = 0;
}
static void
drawmobjs(void)
{
int n;
Mobj *mo;
Drawlist *dl;
for(dl=drawlist; dl<drawlist+DLend; dl++)
for(n=0; n<dl->n; n++){
mo = dl->mo[n];
if(dl->noalpha)
drawpic(mo->px, mo->py, dl->pics[n], addvis(mo));
else
drawpicalpha(mo->px, mo->py, dl->pics[n]);
}
}
static void
addpic(Drawlist *dl, Mobj *mo, int type)
{
int n;
Pic *p;
if((p = frm(mo, type)) == nil)
return;
if(dl->n >= dl->sz){
n = dl->sz * sizeof *dl->pics;
dl->pics = erealloc(dl->pics, n + 16 * sizeof *dl->pics, n);
dl->mo = erealloc(dl->mo, n + 16 * sizeof *dl->mo, n);
dl->sz += 16;
}
n = dl->n++;
dl->pics[n] = p;
dl->mo[n] = mo;
}
static void
addmobjs(Map *m)
{
int air;
Mobj *mo;
Mobjl *ml;
for(ml=m->ml.l; ml!=&m->ml; ml=ml->l){
mo = ml->mo;
air = mo->o->f & Fair;
addpic(drawlist + (air ? DLairshad : DLgndshad), mo, PTshadow);
addpic(drawlist + (air ? DLair : DLgnd), mo, PTbase);
if(mo->state == OSmove)
addpic(drawlist + (air ? DLairglow : DLgndglow), mo, PTglow);
}
}
static Rectangle
setdrawrect(void)
{
Rectangle r;
r.min.x = pan.x / scale / Tilewidth;
r.min.y = pan.y / scale / Tileheight;
r.max.x = r.min.x + (pan.x / scale % Tilewidth != 0);
r.max.x += fbw / Tilewidth + (fbw % Tilewidth != 0);
if(r.max.x > mapwidth)
r.max.x = mapwidth;
r.max.y = r.min.y + (pan.y / scale % Tileheight != 0);
r.max.y += fbh / Tileheight + (fbh % Tilewidth != 0);
if(r.max.y > mapheight)
r.max.y = mapheight;
/* enlarge window to capture units overlapping multiple tiles;
* seems like the easiest way to take this into account */
r.min.x = max(r.min.x - 4, 0);
r.min.y = max(r.min.y - 4, 0);
return r;
}
void
redraw(void)
{
int x, y;
Rectangle r;
Map *m;
clearvis();
clearlists();
r = setdrawrect();
for(y=r.min.y, m=map+y*mapwidth+r.min.x; y<r.max.y; y++){
for(x=r.min.x; x<r.max.x; x++, m++){
drawpic(x*Tilewidth, y*Tileheight, m->t->p, -1);
addmobjs(m);
}
m += mapwidth - (r.max.x - r.min.x);
}
drawmobjs();
if(debugmap)
drawmap(r);
drawhud();
}
void
updatefb(void)
{
qlock(&drawlock);
redraw();
qunlock(&drawlock);
drawfb();
}
void
resetfb(void)
{
fbws = min(nodemapwidth * Nodewidth * scale, Dx(screen->r));
fbh = min(nodemapheight * Nodeheight * scale, Dy(screen->r));
selr = Rpt(screen->r.min, addpt(screen->r.min, Pt(fbws, fbh)));
p0 = Pt(screen->r.min.x + 8, screen->r.max.y - 3 * font->height);
p0.y -= (p0.y - screen->r.min.y) % scale;
panmax.x = max(Nodewidth * nodemapwidth * scale - Dx(screen->r), 0);
panmax.y = max(Nodeheight * nodemapheight * scale - Dy(screen->r), 0);
if(p0.y < selr.max.y){
panmax.y += selr.max.y - p0.y;
fbh -= selr.max.y - p0.y;
selr.max.y = p0.y;
}
fbw = fbws / scale;
fbh /= scale;
fbsz = fbws * fbh * sizeof *fb;
free(fb);
free(fbvis);
freeimage(fbi);
fb = emalloc(fbsz);
fbvis = emalloc(fbw * fbh * sizeof *fb);
if((fbi = allocimage(display,
Rect(0,0,fbws,scale==1 ? fbh : 1),
XRGB32, scale>1, 0)) == nil)
sysfatal("allocimage: %r");
draw(screen, screen->r, display->black, nil, ZP);
}
void
drawfb(void)
{
uchar *p;
Rectangle r, r2;
r = selr;
p = (uchar *)fb;
if(scale == 1){
loadimage(fbi, fbi->r, p, fbsz);
draw(screen, r, fbi, nil, ZP);
}else{
r2 = r;
while(r.min.y < r2.max.y){
r.max.y = r.min.y + scale;
p += loadimage(fbi, fbi->r, p, fbsz / fbh);
draw(screen, r, fbi, nil, ZP);
r.min.y = r.max.y;
}
}
flushimage(display, 1);
}