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page: properly draw images with alpha channel, cleanup

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cinap_lenrek 2011-10-11 05:34:14 +02:00
parent 4ad59914e8
commit 00f9b5d7f1
1 changed files with 32 additions and 28 deletions
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60
sys/src/cmd/page.c
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@ -35,7 +35,8 @@ Point resize, pos;
Page *root, *current;
QLock pagelock;
int nullfd;
Image *background;
Image *frame, *paper, *ground;
char pagespool[] = "/tmp/pagespool.";
@ -929,6 +930,7 @@ zoomdraw(Image *d, Rectangle r, Rectangle top, Image *s, Point sp, int f)
Point a;
if(f <= 1){
gendrawdiff(d, r, top, paper, sp, nil, ZP, SoverD);
gendrawdiff(d, r, top, s, sp, nil, ZP, SoverD);
return;
}
@ -947,7 +949,7 @@ zoomdraw(Image *d, Rectangle r, Rectangle top, Image *s, Point sp, int f)
w = s->r.max.x - sp.x;
if(w > Dx(r))
w = Dx(r);
t = allocimage(display, Rect(r.min.x, r.min.y, r.min.x+w, r.max.y), s->chan, 0, DNofill);
t = allocimage(display, Rect(r.min.x, r.min.y, r.min.x+w, r.max.y), s->chan, 0, 0);
if(t == nil)
return;
for(y=r.min.y; y<r.max.y; y++){
@ -957,16 +959,15 @@ zoomdraw(Image *d, Rectangle r, Rectangle top, Image *s, Point sp, int f)
sp.y++;
}
}
x=r.min.x;
for(sp=r.min; x<r.max.x; sp.x++){
gendrawdiff(d, Rect(x, r.min.y, x+1, r.max.y), top, paper, sp, nil, ZP, SoverD);
gendrawdiff(d, Rect(x, r.min.y, x+1, r.max.y), top, t, sp, nil, ZP, SoverD);
for(x++; ++a.x<f && x<r.max.x; x++)
gendrawdiff(d, Rect(x, r.min.y, x+1, r.max.y), top, d,
Pt(x-1, r.min.y), nil, ZP, SoverD);
a.x = 0;
}
freeimage(t);
}
@ -976,47 +977,49 @@ pagesize(Page *p)
return p->image ? mulpt(subpt(p->image->r.max, p->image->r.min), zoom) : ZP;
}
void
drawframe(Rectangle r)
{
border(screen, r, -Borderwidth, frame, ZP);
gendrawdiff(screen, screen->r, insetrect(r, -Borderwidth), ground, ZP, nil, ZP, SoverD);
flushimage(display, 1);
}
void
drawpage(Page *p)
{
Rectangle r;
Image *i;
if((i = p->image) == nil){
r.min = ZP;
r.max = stringsize(font, p->label);
r = rectaddpt(r, addpt(subpt(divpt(subpt(screen->r.max, screen->r.min), 2), divpt(r.max, 2)),
screen->r.min));
draw(screen, r, display->white, nil, ZP);
string(screen, r.min, display->black, ZP, font, p->label);
} else {
if(i = p->image){
r = rectaddpt(Rpt(ZP, pagesize(p)), addpt(pos, screen->r.min));
zoomdraw(screen, r, ZR, i, i->r.min, zoom);
} else {
r = Rpt(ZP, stringsize(font, p->label));
r = rectaddpt(r, addpt(subpt(divpt(subpt(screen->r.max, screen->r.min), 2),
divpt(r.max, 2)), screen->r.min));
draw(screen, r, paper, nil, ZP);
string(screen, r.min, display->black, ZP, font, p->label);
}
gendrawdiff(screen, screen->r, r, background, ZP, nil, ZP, SoverD);
border(screen, r, -Borderwidth, display->black, ZP);
flushimage(display, 1);
drawframe(r);
}
void
translate(Page *p, Point d)
{
Rectangle r, or, nr;
Rectangle r, nr;
Image *i;
i = p->image;
if((i==0) || (d.x==0 && d.y==0))
if(i==0 || d.x==0 && d.y==0)
return;
r = rectaddpt(Rpt(ZP, pagesize(p)), addpt(pos, screen->r.min));
pos = addpt(pos, d);
nr = rectaddpt(r, d);
or = r;
rectclip(&or, screen->r);
draw(screen, rectaddpt(or, d), screen, nil, or.min);
zoomdraw(screen, nr, rectaddpt(or, d), i, i->r.min, zoom);
gendrawdiff(screen, screen->r, nr, background, ZP, nil, ZP, SoverD);
border(screen, nr, -Borderwidth, display->black, ZP);
flushimage(display, 1);
rectclip(&r, screen->r);
draw(screen, rectaddpt(r, d), screen, nil, r.min);
zoomdraw(screen, nr, rectaddpt(r, d), i, i->r.min, zoom);
drawframe(nr);
}
Page*
@ -1229,14 +1232,15 @@ main(int argc, char *argv[])
free(s);
}
initdraw(drawerr, nil, argv0);
background = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0x777777FF);
draw(screen, screen->r, background, nil, ZP);
flushimage(display, 1);
paper = display->white;
frame = display->black;
ground = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0x777777FF);
display->locking = 1;
unlockdisplay(display);
einit(Ekeyboard|Emouse);
eplumb(Eplumb, "image");
nullfd = open("/dev/null", ORDWR);
if((nullfd = open("/dev/null", ORDWR)) < 0)
sysfatal("open: %r");
current = root = addpage(nil, "root", nil, nil, -1);
if(*argv == nil && !imode)