Measure picture recording speed in nanobench.

bench/RecordingBench.cpp

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "RecordingBench.h"
+
+#include "SkBBHFactory.h"
+#include "SkPictureRecorder.h"
+
+static const int kTileSize = 256;
+
+RecordingBench::RecordingBench(const char* name, const SkPicture* pic, bool useBBH)
+    : fSrc(SkRef(pic))
+    , fName(name)
+    , fUseBBH(useBBH) {}
+
+const char* RecordingBench::onGetName() {
+    return fName.c_str();
+}
+
+bool RecordingBench::isSuitableFor(Backend backend) {
+    return backend == kNonRendering_Backend;
+}
+
+SkIPoint RecordingBench::onGetSize() {
+    return SkIPoint::Make(SkScalarCeilToInt(fSrc->cullRect().width()),
+                          SkScalarCeilToInt(fSrc->cullRect().height()));
+}
+
+void RecordingBench::onDraw(const int loops, SkCanvas*) {
+    SkTileGridFactory::TileGridInfo info;
+    info.fTileInterval.set(kTileSize, kTileSize);
+    info.fMargin.setEmpty();
+    info.fOffset.setZero();
+    SkTileGridFactory factory(info);
+
+    const SkScalar w = fSrc->cullRect().width(),
+                   h = fSrc->cullRect().height();
+
+    for (int i = 0; i < loops; i++) {
+        SkPictureRecorder recorder;
+        fSrc->playback(recorder.beginRecording(w, h, fUseBBH ? &factory : NULL));
+        SkDELETE(recorder.endRecording());
+    }
+}