option to return drawable from recording

samplecode/SampleArc.cpp

Index: samplecode/SampleArc.cpp
diff --git a/samplecode/SampleArc.cpp b/samplecode/SampleArc.cpp
index a44eeb59ba1545cd30d5a2183355c48e71166e98..a87f9c905cc7d8501983442b43bb2768bca3b0ec 100644
--- a/samplecode/SampleArc.cpp
+++ b/samplecode/SampleArc.cpp
@@ -17,6 +17,7 @@
 #include "Sk1DPathEffect.h"
 #include "SkCornerPathEffect.h"
 #include "SkPathMeasure.h"
+#include "SkPictureRecorder.h"
 #include "SkRandom.h"
 #include "SkColorPriv.h"
 #include "SkColorFilter.h"
@@ -42,8 +43,7 @@ class ArcsView : public SampleView {
         SkRect   fR;
         SkScalar fSweep;
     public:
-        MyDrawable(const SkRect& r) : fR(r), fSweep(0) {
-        }
+        MyDrawable(const SkRect& r) : fR(r), fSweep(0) {}
 
         void setSweep(SkScalar sweep) {
             if (fSweep != sweep) {
@@ -82,7 +82,8 @@ class ArcsView : public SampleView {
 
 public:
     SkRect fRect;
-    MyDrawable* fDrawable;
+    MyDrawable* fAnimatingDrawable;
+    SkCanvasDrawable* fRootDrawable;
 
     ArcsView() {
         testparse();
@@ -91,11 +92,16 @@ public:
 
         fRect.set(0, 0, SkIntToScalar(200), SkIntToScalar(200));
         fRect.offset(SkIntToScalar(20), SkIntToScalar(20));
-        fDrawable = SkNEW_ARGS(MyDrawable, (fRect));
+        fAnimatingDrawable = SkNEW_ARGS(MyDrawable, (fRect));
+
+        SkPictureRecorder recorder;
+        draw_root(recorder.beginRecording(SkRect::MakeWH(800, 500)));
+        fRootDrawable = recorder.EXPERIMENTAL_endRecordingAsDrawable();
     }
 
     virtual ~ArcsView() SK_OVERRIDE {
-        fDrawable->unref();
+        fAnimatingDrawable->unref();
+        fRootDrawable->unref();
     }
 
 protected:
@@ -175,10 +181,7 @@ protected:
         canvas->restore();
     }
 

[robertphillips, 2014/11/24 15:42:02]

drawRoot due to fRect usage ?

[reed1, 2014/11/24 17:10:48]

Done.

-    virtual void onDrawContent(SkCanvas* canvas) {
-        fDrawable->setSweep(SampleCode::GetAnimScalar(SkIntToScalar(360)/24,
-                                                      SkIntToScalar(360)));
-
+    void draw_root(SkCanvas* canvas) {
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setStrokeWidth(SkIntToScalar(2));
@@ -186,9 +189,14 @@ protected:
 
         drawRectWithLines(canvas, fRect, paint);
 
-        canvas->EXPERIMENTAL_drawDrawable(fDrawable);
+        canvas->EXPERIMENTAL_drawDrawable(fAnimatingDrawable);
 
         drawArcs(canvas);
+    }
+

[robertphillips, 2014/11/24 15:42:02]

SK_OVERRIDE ?

[reed1, 2014/11/24 17:10:48]

Done.

+    virtual void onDrawContent(SkCanvas* canvas) {
+        fAnimatingDrawable->setSweep(SampleCode::GetAnimScalar(360/24, 360));
+        canvas->EXPERIMENTAL_drawDrawable(fRootDrawable);
         this->inval(NULL);
     }