paint: add 'c' and 'f'

sys/man/1/paint

@@ -23,7 +23,14 @@ Type a number,
 in the pop-up box and hit enter.
 .TP
 .B c
-Clear the screen. Any unsaved work will be lost.
+Change the drawing color to
+.I n,
+where
+0 = black, 1 = white, 2 = red, 3 = green, 4 = blue and 5 = yellow.
+Type the corresponding number into the pop-up box and hit enter.
+.TP
+.B f
+Fill the screen with the current color. Any unsaved work will be lost.
 .TP
 .B o
 Open a bitmap image file for editing. Type a path and filename into the

sys/src/cmd/paint.c

@@ -3,6 +3,10 @@
 #include <draw.h>
 #include <event.h>
 
+#define NCOLORS 6
+
+Image	*colors[NCOLORS];
+
 void
 eresized(int)
 {
@@ -18,17 +22,15 @@ loadimg(char *name)
 
 	if((fd = open(name, OREAD)) < 0)
 		return -1;
-	else {
+	if((b = readimage(display, fd, 0)) == nil){
-		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);
+		return -1;
 	}
+	draw(screen, screen->r, b, 0, b->r.min);
+	flushimage(display, 1);
+	freeimage(b);
+	close(fd);
+	return 0;
 }
 
 int
@@ -40,6 +42,7 @@ saveimg(char *name)
 		return -1;
 	writeimage(fd, screen, 0);
 	close(fd);
+	return 0;
 }
 
 void
@@ -47,12 +50,15 @@ main(int argc, char *argv[])
 {
 	Event e;
 	Point last;
-	int haslast;
+	int b = 1;
-	int brushsize = 1;
+	int c = 0;
+	int cn, f;
+	int haslast = 0;
 	char brush[128];
+	char color[NCOLORS];
 	char file[128];
+	char fill[NCOLORS];
 	
-	haslast = 0;
 	if(initdraw(0, 0, "paint") < 0){
 		fprint(2, "paint: initdraw failed: %r\n");
 		exits("initdraw");
@@ -61,6 +67,13 @@ main(int argc, char *argv[])
 	draw(screen, screen->r, display->white, 0, ZP);
 	flushimage(display, 1);
 
+	colors[0] = display->black;
+	colors[1] = display->white;
+	colors[2] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DRed);
+	colors[3] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DGreen);
+	colors[4] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DBlue);
+	colors[5] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DYellow);
+
 	ARGBEGIN{
 	default:
 		goto Usage;
@@ -84,28 +97,35 @@ main(int argc, char *argv[])
 		case Emouse:
 			if(e.mouse.buttons & 1){
 				if(haslast)
-					line(screen, last, e.mouse.xy, Enddisc, Enddisc, brushsize, display->black, ZP);
+					line(screen, last, e.mouse.xy, Enddisc, Enddisc, b, colors[c], ZP);
 				else
-					fillellipse(screen, e.mouse.xy, brushsize, brushsize, display->black, ZP);
+					fillellipse(screen, e.mouse.xy, b, b, colors[c], 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);
+				b = atoi(brush);
+			}
+			if(e.kbdc == 'c'){
+				if(eenter("Color", color, sizeof(color), &e.mouse) <= 0)
+					break;
+				cn = atoi(color);
+				if(cn >= 0 && cn < NCOLORS)
+					c = cn;
+			}
+			if(e.kbdc == 'f'){
+				if(eenter("Fill", fill, sizeof(fill), &e.mouse) <= 0)
+					break;
+				f = atoi(fill);
+				if(f >= 0 && f < NCOLORS)
+					draw(screen, screen->r, colors[f], 0, ZP);
 			}
-			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;