Avoid redrawing the whole screen when scrolling by zero pixels.

1 files changed, 10 insertions, 3 deletions

diff --git a/framebuffer/gui.c b/framebuffer/gui.c
index 4822a9e28..d6a340d8f 100644
--- a/framebuffer/gui.c
+++ b/framebuffer/gui.c
@@ -119,7 +119,6 @@ widget_scroll_y(struct gui_window *gw, int y, bool abs)
 	} else {
 		bwidget->pany += y;
 	}
-	bwidget->pan_required = true;
 
 	content_height = content_get_height(gw->bw->current_content) * scale;
 
@@ -133,6 +132,11 @@ widget_scroll_y(struct gui_window *gw, int y, bool abs)
 	if ((bwidget->scrolly + bwidget->pany) > (content_height - height))
 		bwidget->pany = (content_height - height) - bwidget->scrolly;
 
+	if (bwidget->pany == 0)
+		return;
+
+	bwidget->pan_required = true;
+
 	fbtk_request_redraw(gw->browser);
 
 	fbtk_set_scroll_position(gw->vscroll, bwidget->scrolly + bwidget->pany);
@@ -152,13 +156,11 @@ widget_scroll_x(struct gui_window *gw, int x, bool abs)
 	} else {
 		bwidget->panx += x;
 	}
-	bwidget->pan_required = true;
 
 	content_width = content_get_width(gw->bw->current_content) * scale;
 
 	width = fbtk_get_width(gw->browser);
 
-
 	/* dont pan off the left */
 	if ((bwidget->scrollx + bwidget->panx) < 0)
 		bwidget->panx = - bwidget->scrollx;
@@ -167,6 +169,11 @@ widget_scroll_x(struct gui_window *gw, int x, bool abs)
 	if ((bwidget->scrollx + bwidget->panx) > (content_width - width))
 		bwidget->panx = (content_width - width) - bwidget->scrollx;
 
+	if (bwidget->panx == 0)
+		return;
+
+	bwidget->pan_required = true;
+
 	fbtk_request_redraw(gw->browser);
 
 	fbtk_set_scroll_position(gw->hscroll, bwidget->scrollx + bwidget->panx);