Use vertex attributes for dash effect in gpu

This will allow us to batch dashed lines together when drawing. Also, this removes the need for
a coord transform matrix in the shader, thus we save the cost of uploading a new matrix uniform
everytime we do a simple transform to the dashed line we are drawing.

BUG=skia:
R=bsalomon@google.com

Author: egdaniel@google.com

Review URL: https://codereview.chromium.org/326103002

1 files changed, 13 insertions, 2 deletions

diff --git a/src/gpu/GrStrokeInfo.h b/src/gpu/GrStrokeInfo.h
index b96ed39096..b9ba5eada1 100644
--- a/src/gpu/GrStrokeInfo.h
+++ b/src/gpu/GrStrokeInfo.h
@@ -33,10 +33,15 @@ public:
         }
     }
 
+    GrStrokeInfo(const SkPaint& paint, SkPaint::Style styleOverride) :
+        fStroke(paint, styleOverride), fDashType(SkPathEffect::kNone_DashType) {
+        this->init(paint);
+    }
+
+
     explicit GrStrokeInfo(const SkPaint& paint) :
         fStroke(paint), fDashType(SkPathEffect::kNone_DashType) {
-        const SkPathEffect* pe = paint.getPathEffect();
-        this->setDashInfo(pe);
+        this->init(paint);
     }
 
     const SkStrokeRec& getStrokeRec() const { return fStroke; }
@@ -79,6 +84,12 @@ public:
     const SkPathEffect::DashInfo& getDashInfo() const { return fDashInfo; }
 
 private:
+
+    void init(const SkPaint& paint) {
+        const SkPathEffect* pe = paint.getPathEffect();
+        this->setDashInfo(pe);
+    }
+
     SkStrokeRec            fStroke;
     SkPathEffect::DashType fDashType;
     SkPathEffect::DashInfo fDashInfo;