add computeFastBounds to SkPathEffect, so we can attempt quickReject

Review URL: https://codereview.appspot.com/6209070

git-svn-id: http://skia.googlecode.com/svn/trunk@3964 2bbb7eff-a529-9590-31e7-b0007b416f81

2 files changed, 17 insertions, 6 deletions

diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index 15fdbd196e..66fa0df1be 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -2044,16 +2044,24 @@ bool SkPaint::getFillPath(const SkPath& src, SkPath* dst) const {
     return width != 0;  // return true if we're filled, or false if we're hairline (width == 0)
 }
 
-const SkRect& SkPaint::doComputeFastBounds(const SkRect& src,
+const SkRect& SkPaint::doComputeFastBounds(const SkRect& origSrc,
                                                  SkRect* storage) const {
     SkASSERT(storage);
 
+    const SkRect* src = &origSrc;
+
     if (this->getLooper()) {
         SkASSERT(this->getLooper()->canComputeFastBounds(*this));
-        this->getLooper()->computeFastBounds(*this, src, storage);
+        this->getLooper()->computeFastBounds(*this, *src, storage);
         return *storage;
     }
 
+    SkRect tmpSrc;
+    if (this->getPathEffect()) {
+        this->getPathEffect()->computeFastBounds(&tmpSrc, origSrc);
+        src = &tmpSrc;
+    }
+
     if (this->getStyle() != SkPaint::kFill_Style) {
         // since we're stroked, outset the rect by the radius (and join type)
         SkScalar radius = SkScalarHalf(this->getStrokeWidth());
@@ -2065,13 +2073,12 @@ const SkRect& SkPaint::doComputeFastBounds(const SkRect& src,
                 radius = SkScalarMul(radius, scale);
             }
         }
-        storage->set(src.fLeft - radius, src.fTop - radius,
-                     src.fRight + radius, src.fBottom + radius);
+        storage->set(src->fLeft - radius, src->fTop - radius,
+                     src->fRight + radius, src->fBottom + radius);
     } else {
-        *storage = src;
+        *storage = *src;
     }
 
-    // check the mask filter
     if (this->getMaskFilter()) {
         this->getMaskFilter()->computeFastBounds(*storage, storage);
     }
diff --git a/src/core/SkPathEffect.cpp b/src/core/SkPathEffect.cpp
index 8731aedb84..dcce6d6b56 100644
--- a/src/core/SkPathEffect.cpp
+++ b/src/core/SkPathEffect.cpp
@@ -11,6 +11,10 @@
 #include "SkPath.h"
 #include "SkBuffer.h"
 
+void SkPathEffect::computeFastBounds(SkRect* dst, const SkRect& src) {
+    *dst = src;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1)