shithub: patch

ref: 3af13d52b0e2e5f608de7c0d34d7ce515830ec0e
dir: /fplot-col/

diff -r 82ca4d784349 sys/src/cmd/fplot.c
--- a/sys/src/cmd/fplot.c	Sun Jul 01 23:35:23 2018 -0400
+++ b/sys/src/cmd/fplot.c	Thu Jul 05 04:44:35 2018 +0200
@@ -366,7 +366,9 @@
 		if(x >= picx || y >= picy || x < 0 || y < 0)
 			return;
 		p = imagedata + (picx * y + x) * 3;
-		p[0] = p[1] = p[2] = 0;
+		p[0] = 0;
+		p[1] = 0x44;
+		p[2] = 0x88;
 	} else
 		draw(screen, Rect(x, y, x + 1, y + 1), color, nil, ZP);
 }
@@ -450,7 +452,7 @@
 		lr = rectsubpt(lr, Pt(0, lr.min.y - ny));
 	}
 	if(rectinrect(lr, screen->r) && (lr.min.x > x || lr.max.x <= x)){
-		string(screen, lr.min, display->black, ZP, display->defaultfont, buf);
+		string(screen, lr.min, color, ZP, display->defaultfont, buf);
 		return 1;
 	}
 	return 0;
@@ -472,7 +474,7 @@
 		lr = rectsubpt(lr, Pt(lr.min.x - nx, 0));
 	}
 	if(rectinrect(lr, screen->r) && (lr.min.y > y || lr.max.y <= y)){
-		string(screen, lr.min, display->black, ZP, display->defaultfont, buf);
+		string(screen, lr.min, color, ZP, display->defaultfont, buf);
 		return 1;
 	}
 	return 0;
@@ -539,25 +541,25 @@
 		x = deconvx(&screen->r, 0);
 	else
 		x = screen->r.min.x+5;
-	line(screen, Pt(x, screen->r.min.y), Pt(x, screen->r.max.y), Endarrow, 0, 0, display->black, ZP);
+	line(screen, Pt(x, screen->r.min.y), Pt(x, screen->r.max.y), Endarrow, 0, 0, color, ZP);
 	if(ymin < 0 && ymax > 0)
 		y = deconvy(&screen->r, 0);
 	else
 		y = screen->r.max.y-5;
-	line(screen, Pt(screen->r.min.x, y), Pt(screen->r.max.x, y), 0, Endarrow, 0, display->black, ZP);
+	line(screen, Pt(screen->r.min.x, y), Pt(screen->r.max.x, y), 0, Endarrow, 0, color, ZP);
 	nx = ticks(xmin, xmax, &dx, &mx);
 	tickfmt(dx, mx, nx, fmt);
 	for(i = 0; i <= nx; i++){
 		p = deconvx(&screen->r, dx*i+mx);
 		if(xticklabel(fmt, dx*i+mx, p, x, y))
-			line(screen, Pt(p, y), Pt(p, y-5), 0, 0, 0, display->black, ZP);
+			line(screen, Pt(p, y), Pt(p, y-5), 0, 0, 0, color, ZP);
 	}
 	ny = ticks(ymin, ymax, &dy, &my);
 	tickfmt(dy, my, ny, fmt);
 	for(i = 0; i <= ny; i++){
 		p = deconvy(&screen->r, dy*i+my);
 		if(yticklabel(fmt, dy*i+my, p, x, y))
-			line(screen, Pt(x, p), Pt(x+5, p), 0, 0, 0, display->black, ZP);
+			line(screen, Pt(x, p), Pt(x+5, p), 0, 0, 0, color, ZP);
 	}
 }
 
@@ -566,7 +568,6 @@
 {
 	int i;
 	
-	color = display->black;
 	for(i = 0; i < nfns; i++)
 		drawgraph(&fns[i], &screen->r);
 	if(!aflag)
@@ -603,7 +604,7 @@
 	xmax = xmax_;
 	ymin = ymin_;
 	ymax = ymax_;
-	draw(screen, screen->r, display->white, nil, ZP);
+	draw(screen, screen->r, display->black, nil, ZP);
 	drawgraphs();
 }
 
@@ -617,7 +618,7 @@
 	ymax = zoomst[nzoomst - 1].ymax;
 	zoomst = realloc(zoomst, sizeof(FRectangle) * --nzoomst);
 	if(zoomst == nil && nzoomst != 0) sysfatal("realloc: %r");
-	draw(screen, screen->r, display->white, nil, ZP);
+	draw(screen, screen->r, display->black, nil, ZP);
 	drawgraphs();
 }
 
@@ -687,7 +688,6 @@
 	parsefns(argc, argv);
 	if(cflag) {
 		imagedata = emalloc(picx * picy * 3);
-		memset(imagedata, 0xFF, picx * picy * 3);
 		print("%11s %11d %11d %11d %11d ", "r8g8b8", 0, 0, picx, picy);
 		r.min.x = r.min.y = 0;
 		r.max.x = picx;
@@ -699,7 +699,11 @@
 	} else {
 		if(initdraw(nil, nil, "fplot") < 0)
 			sysfatal("initdraw: %r");
+		color = allocimage(display, Rect(0,0,1,1), RGB24, 1, 0x884400ff);
+		if(color == nil)
+			sysfatal("allocimage: %r");
 		einit(Emouse | Ekeyboard);
+		draw(screen, screen->r, display->black, nil, ZP);
 		drawgraphs();
 		for(;;) {
 			switch(event(&e)) {
@@ -720,7 +724,7 @@
 						zoomst[nzoomst++] = (FRectangle){xmin, xmax, ymin, ymax};
 						ymin = gymin-0.05*(gymax-gymin);
 						ymax = gymax+0.05*(gymax-gymin);
-						draw(screen, screen->r, display->white, nil, ZP);
+						draw(screen, screen->r, display->black, nil, ZP);
 						drawgraphs();
 					}
 					break;