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#include "stdinc.h"
#include "dat.h"
#include "fns.h"
enum
{
Top = 1,
Bottom = 1,
Left = 40,
Right = 0,
MinWidth = Left+Right+2,
MinHeight = Top+Bottom+2,
DefaultWidth = Left+Right+500,
DefaultHeight = Top+Bottom+40
};
QLock memdrawlock;
static Memsubfont *smallfont;
static Memimage *black;
static Memimage *blue;
static Memimage *red;
static Memimage *lofill[6];
static Memimage *hifill[6];
static Memimage *grid;
static ulong fill[] = {
0xFFAAAAFF, 0xBB5D5DFF, /* peach */
DPalegreygreen, DPurpleblue, /* aqua */
DDarkyellow, DYellowgreen, /* yellow */
DMedgreen, DDarkgreen, /* green */
0x00AAFFFF, 0x0088CCFF, /* blue */
0xCCCCCCFF, 0x888888FF, /* grey */
};
Memimage*
allocrepl(ulong color)
{
Memimage *m;
m = allocmemimage(Rect(0,0,1,1), RGB24);
memfillcolor(m, color);
m->flags |= Frepl;
m->clipr = Rect(-1000000, -1000000, 1000000, 1000000);
return m;
}
static void
ginit(void)
{
static int first = 1;
int i;
if(!first)
return;
first = 0;
memimageinit();
#ifdef PLAN9PORT
smallfont = openmemsubfont(unsharp("#9/font/lucsans/lstr.10"));
#else
smallfont = openmemsubfont("/lib/font/bit/lucidasans/lstr.10");
#endif
black = memblack;
blue = allocrepl(DBlue);
red = allocrepl(DRed);
grid = allocrepl(0x77777777);
for(i=0; i<nelem(fill)/2 && i<nelem(lofill) && i<nelem(hifill); i++){
lofill[i] = allocrepl(fill[2*i]);
hifill[i] = allocrepl(fill[2*i+1]);
}
}
static void
mklabel(char *str, int v)
{
if(v < 0){
v = -v;
*str++ = '-';
}
if(v < 10000)
sprint(str, "%d", v);
else if(v < 10000000)
sprint(str, "%dk", v/1000);
else
sprint(str, "%dM", v/1000000);
}
static void
drawlabel(Memimage *m, Point p, int n)
{
char buf[30];
Point w;
mklabel(buf, n);
w = memsubfontwidth(smallfont, buf);
memimagestring(m, Pt(p.x-5-w.x, p.y), memblack, ZP, smallfont, buf);
}
static int
scalept(int val, int valmin, int valmax, int ptmin, int ptmax)
{
if(val <= valmin)
val = valmin;
if(val >= valmax)
val = valmax;
if(valmax == valmin)
valmax++;
return ptmin + (vlong)(val-valmin)*(ptmax-ptmin)/(valmax-valmin);
}
Memimage*
statgraph(Graph *g)
{
int i, nbin, x, lo, hi, min, max, first;
Memimage *m;
Rectangle r;
Statbin *b, bin[2000]; /* 32 kB, but whack is worse */
needstack(8192); /* double check that bin didn't kill us */
if(g->wid <= MinWidth)
g->wid = DefaultWidth;
if(g->ht <= MinHeight)
g->ht = DefaultHeight;
if(g->wid > nelem(bin))
g->wid = nelem(bin);
if(g->fill < 0)
g->fill = ((uint)(uintptr)g->arg>>8)%nelem(lofill);
if(g->fill > nelem(lofill))
g->fill %= nelem(lofill);
nbin = g->wid - (Left+Right);
binstats(g->fn, g->arg, g->t0, g->t1, bin, nbin);
/*
* compute bounds
*/
min = g->min;
max = g->max;
if(min < 0 || max <= min){
min = max = 0;
first = 1;
for(i=0; i<nbin; i++){
b = &bin[i];
if(b->nsamp == 0)
continue;
if(first || b->min < min)
min = b->min;
if(first || b->max > max)
max = b->max;
first = 0;
}
}
qlock(&memdrawlock);
ginit();
if(smallfont==nil || black==nil || blue==nil || red==nil || hifill[0]==nil || lofill[0]==nil){
werrstr("graphics initialization failed: %r");
qunlock(&memdrawlock);
return nil;
}
/* fresh image */
m = allocmemimage(Rect(0,0,g->wid,g->ht), ABGR32);
if(m == nil){
qunlock(&memdrawlock);
return nil;
}
r = Rect(Left, Top, g->wid-Right, g->ht-Bottom);
memfillcolor(m, DTransparent);
/* x axis */
memimagedraw(m, Rect(r.min.x, r.max.y, r.max.x, r.max.y+1), black, ZP, memopaque, ZP, S);
/* y labels */
drawlabel(m, r.min, max);
if(min != 0)
drawlabel(m, Pt(r.min.x, r.max.y-smallfont->height), min);
/* actual data */
for(i=0; i<nbin; i++){
b = &bin[i];
if(b->nsamp == 0)
continue;
lo = scalept(b->min, min, max, r.max.y, r.min.y);
hi = scalept(b->max, min, max, r.max.y, r.min.y);
x = r.min.x+i;
hi-=2;
memimagedraw(m, Rect(x, hi, x+1,lo), hifill[g->fill%nelem(hifill)], ZP, memopaque, ZP, S);
memimagedraw(m, Rect(x, lo, x+1, r.max.y), lofill[g->fill%nelem(lofill)], ZP, memopaque, ZP, S);
}
if(bin[nbin-1].nsamp)
drawlabel(m, Pt(r.max.x, r.min.y+(Dy(r)-smallfont->height)/2), bin[nbin-1].avg);
qunlock(&memdrawlock);
return m;
}
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