add paint(1)

sys/src/cmd/paint.c

@@ -0,0 +1,83 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+void
+eresized(int)
+{
+	if(getwindow(display, Refnone) < 0)
+		sysfatal("resize failed");
+}
+
+/* stolen from mothra */
+void
+screendump(char *name, int full)
+{
+	Image *b;
+	int fd;
+
+	fd=create(name, OWRITE|OTRUNC, 0666);
+	if(fd==-1)
+		sysfatal("can't create file");
+	if(full){
+		writeimage(fd, screen, 0);
+	} else {
+		if((b=allocimage(display, screen->r, screen->chan, 0, DNofill)) == nil){
+			close(fd);
+			sysfatal("can't allocate image");
+		}
+		draw(b, b->r, screen, 0, b->r.min);
+		writeimage(fd, b, 0);
+		freeimage(b);
+	}
+	close(fd);
+}
+
+void
+main()
+{
+	Event e;
+	Point last;
+	int haslast;
+	char file[128];
+	
+	haslast = 0;
+	initdraw(0, 0, 0);
+	einit(Emouse | Ekeyboard);
+	draw(screen, screen->r, display->white, 0, ZP);
+	flushimage(display, 1);
+	while(1){
+		switch(event(&e)){
+		case Emouse:
+			if(e.mouse.buttons & 1){
+				if(haslast)
+					line(screen, last, e.mouse.xy, Enddisc, Enddisc, 5, display->black, ZP);
+				else
+					fillellipse(screen, e.mouse.xy, 5, 5, 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, 5, 5, display->white, ZP);
+				flushimage(display, 1);
+			}
+			break;
+		case Ekeyboard:
+			if(e.kbdc == 'q')
+				exits(nil);
+			if(e.kbdc == 'c')
+				draw(screen, screen->r, display->white, 0, ZP);
+			if(e.kbdc == 's'){
+				snprint(file, sizeof(file), "out.bit");
+				if(eenter("Save to", file, sizeof(file), &e.mouse) <= 0)
+					break;
+				screendump(file, 0);
+			}
+			break;
+		}
+	}
+}