In GrShape detect that stroked axis-aligned lines are rrects.

include/core/SkRect.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkRect_DEFINED
 #define SkRect_DEFINED
 
@@ skipping 400 matching lines @@
         r.set(0, 0, SkIntToScalar(w), SkIntToScalar(h));
         return r;
     }
 
     static SkRect SK_WARN_UNUSED_RESULT MakeSize(const SkSize& size) {
         SkRect r;
         r.set(0, 0, size.width(), size.height());
         return r;
     }
 
-    static SkRect SK_WARN_UNUSED_RESULT MakeLTRB(SkScalar l, SkScalar t, SkScalar r, SkScalar b) {
-        SkRect rect;
-        rect.set(l, t, r, b);
-        return rect;
+    static constexpr SkRect SK_WARN_UNUSED_RESULT MakeLTRB(SkScalar l, SkScalar t, SkScalar r,
+                                                           SkScalar b) {
+        return SkRect {l, t, r, b};
     }
 
     static SkRect SK_WARN_UNUSED_RESULT MakeXYWH(SkScalar x, SkScalar y, SkScalar w, SkScalar h) {
         SkRect r;
         r.set(x, y, x + w, y + h);
         return r;
     }
 
     SK_ATTR_DEPRECATED("use Make()")
     static SkRect SK_WARN_UNUSED_RESULT MakeFromIRect(const SkIRect& irect) {
@@ skipping 461 matching lines @@
     void dumpHex() const { this->dump(true); }
 };
 
 inline bool SkIRect::contains(const SkRect& r) const {
     return  !r.isEmpty() && !this->isEmpty() &&     // check for empties
             (SkScalar)fLeft <= r.fLeft && (SkScalar)fTop <= r.fTop &&
             (SkScalar)fRight >= r.fRight && (SkScalar)fBottom >= r.fBottom;
 }
 
 #endif