SkPictureGpuAnalyzer

include/core/SkPictureAnalyzer.h

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkPictureAnalyzer_DEFINED
+#define SkPictureAnalyzer_DEFINED
+
+#include "SkRefCnt.h"
+#include "SkTypes.h"
+
+class GrContext;
+class SkPicture;
+
+/** \class SkPictureGpuAnalyzer
+
+     Gathers GPU-related statistics for one or more SkPictures.
+*/
+class SK_API SkPictureGpuAnalyzer final : public SkNoncopyable {
+public:
+    SkPictureGpuAnalyzer();
+    explicit SkPictureGpuAnalyzer(const sk_sp<SkPicture>& picture);
+
+    /**
+     *  Process the given picture and accumulate its stats.
+     */
+    void analyze(const SkPicture*);
+
+    /**
+     *  Reset all accumulated stats.
+     */
+    void reset();
+
+    /**
+     *  Returns true if the analyzed pictures are suitable for rendering on the GPU.
+     */
+    bool suitableForGpuRasterization(GrContext*, const char** whyNot = nullptr) const;

[bsalomon, 2016/05/12 20:59:02]

Should we take the GrContext* in the constructor in case in the future we want
to decide what needs to be tracked based on its properties?

Also, I think we should take a GrContextThreadSafeProxy instead. This would make
it safe to run the analyzer on a different thread than the one used to draw the
pictures. Maybe its not needed today, but could be in the future.

[f(malita), 2016/05/12 21:15:19]

Done.

+
+private:
+    uint32_t fNumSlowPaths;
+
+    typedef SkNoncopyable INHERITED;
+};
+
+#endif // SkPictureAnalyzer_DEFINED