add rect.inset(dx, dy)

git-svn-id: http://skia.googlecode.com/svn/trunk@1058 2bbb7eff-a529-9590-31e7-b0007b416f81
2011-04-05 20:05:56 +00:00 · 2011-04-05 20:05:56 +00:00 · f81401763e
commit f81401763e
parent 3eb291455c
1 changed files with 9 additions and 0 deletions
--- a/gpu/include/GrRect.h
+++ b/gpu/include/GrRect.h
@ -232,6 +232,15 @@ struct GrRect {
        fRight += tx;   fBottom += ty;
    }

+    /**
+     *  Inset the rectangle by dx,dy. If dx > 0 the rect becomes narrower,
+     *  if dx < 0 the rect becomes wider.
+     */
+    void inset(GrScalar dx, GrScalar dy) {
+        fLeft += dx;    fTop    += dy;
+        fRight -= dx;   fBottom -= dy;
+    }
+
    /**
     *  Initialize a rectangle to a point.
     *  @param pt the point used to initialize the rectangle.