inline very common intersect+rect_rgn

Extracted from previous compound CL (with other changes).

This is the very common case for clips, and inlining this eliminates a series of function calls.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2116513002

TBR=mtklein

Review-Url: https://codereview.chromium.org/2116513002

1 files changed, 9 insertions, 1 deletions

diff --git a/include/core/SkRegion.h b/include/core/SkRegion.h
index eb0f1367ab..a0f0e4ad3c 100644
--- a/include/core/SkRegion.h
+++ b/include/core/SkRegion.h
@@ -255,7 +255,15 @@ public:
      *  specified rectangle: this = (this op rect).
      *  Return true if the resulting region is non-empty.
      */
-    bool op(const SkIRect& rect, Op op) { return this->op(*this, rect, op); }
+    bool op(const SkIRect& rect, Op op) {
+        if (this->isRect() && kIntersect_Op == op) {
+            if (!fBounds.intersect(rect)) {
+                return this->setEmpty();
+            }
+            return true;
+        }
+        return this->op(*this, rect, op);
+    }
 
     /**
      *  Set this region to the result of applying the Op to this region and the