optimize intersect, use getType to utilize fast-case in preTranslate

10-15% speed up in clip_record_overhead bench

Comparing the raw fType field was missing the (maybe deprecatable) IsRectToRect
bit (0x10), which is set for identity and translate matrices, so we were
never taking the fast case.

BUG=skia:

Change-Id: I1c73f4bae42f2311454c7568ef8891239c3cae83
Reviewed-on: https://skia-review.googlesource.com/9388
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Herb Derby <herb@google.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/core/SkMatrix.h b/include/core/SkMatrix.h
index bae37a75b2..d408fb12b0 100644
--- a/include/core/SkMatrix.h
+++ b/include/core/SkMatrix.h
@@ -816,6 +816,14 @@ private:
         return ((fTypeMask & 0xF) == 0);
     }
 
+    inline void updateTranslateMask() {
+        if ((fMat[kMTransX] != 0) | (fMat[kMTransY] != 0)) {
+            fTypeMask |= kTranslate_Mask;
+        } else {
+            fTypeMask &= ~kTranslate_Mask;
+        }
+    }
+
     bool SK_WARN_UNUSED_RESULT invertNonIdentity(SkMatrix* inverse) const;
 
     static bool Poly2Proc(const SkPoint[], SkMatrix*, const SkPoint& scale);