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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
void
eresized(int)
{
if(getwindow(display, Refnone) < 0)
sysfatal("resize failed");
}
int
loadimg(char *name)
{
Image *b;
int fd;
if((fd = open(name, OREAD)) < 0)
return -1;
else {
if((b = readimage(display, fd, 0)) == nil){
close(fd);
return -1;
} else {
draw(screen, screen->r, b, 0, b->r.min);
flushimage(display, 1);
freeimage(b);
}
close(fd);
}
}
int
saveimg(char *name)
{
int fd;
if((fd = create(name, OWRITE|OTRUNC, 0666)) < 0)
return -1;
writeimage(fd, screen, 0);
close(fd);
}
void
main(int argc, char *argv[])
{
Event e;
Point last;
int haslast;
int brushsize = 1;
char brush[128];
char file[128];
haslast = 0;
if(initdraw(0, 0, "paint") < 0){
fprint(2, "paint: initdraw failed: %r\n");
exits("initdraw");
}
einit(Emouse | Ekeyboard);
draw(screen, screen->r, display->white, 0, ZP);
flushimage(display, 1);
ARGBEGIN{
default:
goto Usage;
}ARGEND
switch(argc){
default:
Usage:
fprint(2, "Usage: [file]\n");
exits("usage");
case 0:
break;
case 1:
if(loadimg(argv[0]) < 0)
sysfatal("%r");
break;
}
while(1){
switch(event(&e)){
case Emouse:
if(e.mouse.buttons & 1){
if(haslast)
line(screen, last, e.mouse.xy, Enddisc, Enddisc, brushsize, display->black, ZP);
else
fillellipse(screen, e.mouse.xy, brushsize, brushsize, display->black, ZP);
last = e.mouse.xy;
haslast = 1;
flushimage(display, 1);
} else
haslast = 0;
if(e.mouse.buttons & 4){
fillellipse(screen, e.mouse.xy, brushsize, brushsize, display->white, ZP);
flushimage(display, 1);
}
break;
case Ekeyboard:
if(e.kbdc == 'b'){
if(eenter("Brush", brush, sizeof(brush), &e.mouse) <= 0)
break;
brushsize = atoi(brush);
}
if(e.kbdc == 'c')
draw(screen, screen->r, display->white, 0, ZP);
if(e.kbdc == 'o'){
if(eenter("Open file", file, sizeof(file), &e.mouse) <= 0)
break;
if(loadimg(file) < 0){
rerrstr(file, sizeof(file));
eenter(file, 0, 0, &e.mouse);
}
}
if(e.kbdc == 'q')
exits(nil);
if(e.kbdc == 's'){
if(eenter("Save to", file, sizeof(file), &e.mouse) <= 0)
break;
if(saveimg(file) < 0){
rerrstr(file, sizeof(file));
eenter(file, 0, 0, &e.mouse);
}
}
break;
}
}
}
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