X-Git-Url: http://git.itanic.dy.fi/?p=mandelbrot;a=blobdiff_plain;f=mandelbrot.c;fp=mandelbrot.c;h=624fcf2ebda615e2275021d1d50aa59b91624a30;hp=be706ebc1d15a01002c41f1943185afafabdd172;hb=ba47e789a437c348b1d0a1a3cfa2c91e517762c7;hpb=67d26aaed387f95b62a74ce80d2b0c43e7212c3d

diff --git a/mandelbrot.c b/mandelbrot.c
index be706eb..624fcf2 100644
--- a/mandelbrot.c
+++ b/mandelbrot.c
@@ -45,8 +45,12 @@ int draw_mandelbrot(struct SDL_Surface *screen, double x1, double x2,
 	xstep = xlen / (double)screen->w;
 	ystep = ylen / (double)screen->h;
 
-	for (ys = 0, y0 = y1; ys < screen->h; y0 += ystep, ys++) {
-		for (xs = 0, x0 = x1; xs < screen->w; x0 += xstep, xs++) {
+	y0 = y1;
+#pragma omp parallel for private(xs, ys, x0, y0)
+	for (ys = 0; ys < screen->h; ys++) {
+		y0 = y1 + ystep * ys;
+		x0 = x1;
+		for (xs = 0; xs < screen->w; xs++) {
 			iteration = get_mandelbrot_iterations(x0, y0);
 
 			if (iteration == MAX_ITERATION)
@@ -55,11 +59,11 @@ int draw_mandelbrot(struct SDL_Surface *screen, double x1, double x2,
 				putpixel(screen, xs, ys,
 					iteration * 8, iteration,
 					iteration / 4);
+			x0 += xstep;
 		}
-
-		SDL_Flip(screen);
 	}
 
+	SDL_Flip(screen);
 	return 0;
 }