Make lines a special case in GrShape

src/gpu/GrShape.h

Index: src/gpu/GrShape.h
diff --git a/src/gpu/GrShape.h b/src/gpu/GrShape.h
index 87ee26e17333a50b7df08cb0bde4b19d51835ced..8f3be58702820eb0c4d7161b290a9477a5d640ac 100644
--- a/src/gpu/GrShape.h
+++ b/src/gpu/GrShape.h
@@ -152,12 +152,19 @@ public:
      * If the unstyled shape is a straight line segment, returns true and sets pts to the endpoints.
      * An inverse filled line path is still considered a line.
      */
-     bool asLine(SkPoint pts[2]) const {
-         if (fType != Type::kPath) {
-             return false;
-         }
-         return this->path().isLine(pts);
-     }
+    bool asLine(SkPoint pts[2], bool* inverted) const {
+        if (fType != Type::kLine) {
+            return false;
+        }
+        if (pts) {
+            pts[0] = fLineData.fPts[0];
+            pts[1] = fLineData.fPts[1];
+        }
+        if (inverted) {
+            *inverted = fLineData.fInverted;
+        }
+        return true;
+    }
 
     /** Returns the unstyled geometry as a path. */
     void asPath(SkPath* out) const {
@@ -175,6 +182,16 @@ public:
                     out->setFillType(kDefaultPathFillType);
                 }
                 break;
+            case Type::kLine:
+                out->reset();
+                out->moveTo(fLineData.fPts[0]);
+                out->lineTo(fLineData.fPts[1]);
+                if (fLineData.fInverted) {
+                    out->setFillType(kDefaultPathInverseFillType);
+                } else {
+                    out->setFillType(kDefaultPathFillType);
+                }
+                break;
             case Type::kPath:
                 *out = this->path();
                 break;
@@ -191,13 +208,13 @@ public:
      * Gets the bounds of the geometry without reflecting the shape's styling. This ignores
      * the inverse fill nature of the geometry.
      */
-    const SkRect& bounds() const;
+    SkRect bounds() const;
 
     /**
      * Gets the bounds of the geometry reflecting the shape's styling (ignoring inverse fill
      * status).
      */
-    void styledBounds(SkRect* bounds) const;
+    SkRect styledBounds() const;
 
     /**
      * Is this shape known to be convex, before styling is applied. An unclosed but otherwise
@@ -210,6 +227,8 @@ public:
                 return true;
             case Type::kRRect:
                 return true;
+            case Type::kLine:
+                return true;
             case Type::kPath:
                 // SkPath.isConvex() really means "is this path convex were it to be closed" and
                 // thus doesn't give the correct answer for stroked paths, hence we also check
@@ -231,6 +250,9 @@ public:
             case Type::kRRect:
                 ret = fRRectData.fInverted;
                 break;
+            case Type::kLine:
+                ret = fLineData.fInverted;
+                break;
             case Type::kPath:
                 ret = this->path().isInverseFillType();
                 break;
@@ -264,6 +286,8 @@ public:
                 return true;
             case Type::kRRect:
                 return true;
+            case Type::kLine:
+                return false;
             case Type::kPath:
                 // SkPath doesn't keep track of the closed status of each contour.
                 return SkPathPriv::IsClosedSingleContour(this->path());
@@ -282,6 +306,8 @@ public:
                     return SkPath::kLine_SegmentMask;
                 }
                 return SkPath::kLine_SegmentMask | SkPath::kConic_SegmentMask;
+            case Type::kLine:
+                return SkPath::kLine_SegmentMask;
             case Type::kPath:
                 return this->path().getSegmentMasks();
         }
@@ -307,6 +333,7 @@ private:
     enum class Type {
         kEmpty,
         kRRect,
+        kLine,
         kPath,
     };
 
@@ -356,6 +383,7 @@ private:
 
     void attemptToSimplifyPath();
     void attemptToSimplifyRRect();
+    void attemptToSimplifyLine();
 
     // Defaults to use when there is no distinction between even/odd and winding fills.
     static constexpr SkPath::FillType kDefaultPathFillType = SkPath::kEvenOdd_FillType;
@@ -420,6 +448,10 @@ private:
             // Gen ID of the original path (fPath may be modified)
             int32_t                     fGenID;
         } fPathData;
+        struct {
+            SkPoint                     fPts[2];
+            bool                        fInverted;
+        } fLineData;
     };
     GrStyle                     fStyle;
     SkAutoSTArray<8, uint32_t>  fInheritedKey;