[gnome-shell] st-scroll-view-fade: Include outer bound of pixel on border

[Jonas Ådahl <jadahl src gnome org>]

commit 6bc3300e5a3d828be546149df9adf77bf6c2efd6
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Oct 20 06:10:58 2017 +0200

    st-scroll-view-fade: Include outer bound of pixel on border
    
    The fade shader will draw the fade effect up until the border pixel. If
    we set the bottom right coordinate to the outer edge of the pixel we
    might end up not drawing the fade effect on all of the pixels. This
    could for example happen if one logical pixel (clutter stage pixel)
    consists of more than one physical pixel.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=765011

 src/st/st-scroll-view-fade.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/st/st-scroll-view-fade.c b/src/st/st-scroll-view-fade.c
index 37f44c42c..3942cbcf0 100644
--- a/src/st/st-scroll-view-fade.c
+++ b/src/st/st-scroll-view-fade.c
@@ -110,8 +110,8 @@ st_scroll_view_fade_paint_target (ClutterOffscreenEffect *effect)
    */
   fade_area_topleft[0] = content_box.x1 + (verts[0].x - paint_box.x1);
   fade_area_topleft[1] = content_box.y1 + (verts[0].y - paint_box.y1);
-  fade_area_bottomright[0] = content_box.x2 + (verts[3].x - paint_box.x2);
-  fade_area_bottomright[1] = content_box.y2 + (verts[3].y - paint_box.y2);
+  fade_area_bottomright[0] = content_box.x2 + (verts[3].x - paint_box.x2) + 1;
+  fade_area_bottomright[1] = content_box.y2 + (verts[3].y - paint_box.y2) + 1;
 
   g_object_get (ST_SCROLL_VIEW (self->actor),
                 "hscrollbar-visible", &h_scroll_visible,