Add methods for converting GrShape to filled style

Bug: skia:
Change-Id: I6726428d1358909972adec8d63686b637ef5bb5e
Reviewed-on: https://skia-review.googlesource.com/40222
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 21 insertions, 1 deletions

diff --git a/src/gpu/GrShape.h b/src/gpu/GrShape.h
index 5226c239cd..2b48eca633 100644
--- a/src/gpu/GrShape.h
+++ b/src/gpu/GrShape.h
@@ -30,7 +30,7 @@
  *
  * Currently this can only be constructed from a path, rect, or rrect though it can become a path
  * applying style to the geometry. The idea is to expand this to cover most or all of the geometries
- * that have SkCanvas::draw APIs.
+ * that have fast paths in the GPU backend.
  */
 class GrShape {
 public:
@@ -121,6 +121,25 @@ public:
 
     ~GrShape() { this->changeType(Type::kEmpty); }
 
+    /**
+     * Informs MakeFilled on how to modify that shape's fill rule when making a simple filled
+     * version of the shape.
+     */
+    enum class FillInversion {
+        kPreserve,
+        kFlip,
+        kForceNoninverted,
+        kForceInverted
+    };
+    /**
+     * Makes a filled shape from the pre-styled original shape and optionally modifies whether
+     * the fill is inverted or not. It's important to note that the original shape's geometry
+     * may already have been modified if doing so was neutral with respect to its style
+     * (e.g. filled paths are always closed when stored in a shape and dashed paths are always
+     * made non-inverted since dashing ignores inverseness).
+     */
+    static GrShape MakeFilled(const GrShape& original, FillInversion = FillInversion::kPreserve);
+
     const GrStyle& style() const { return fStyle; }
 
     /**
@@ -347,6 +366,7 @@ public:
     void writeUnstyledKey(uint32_t* key) const;
 
 private:
+
     enum class Type {
         kEmpty,
         kInvertedEmpty,