SkPictureGpuAnalyzer

include/core/SkPictureAnalyzer.h

Index: include/core/SkPictureAnalyzer.h
diff --git a/include/core/SkPictureAnalyzer.h b/include/core/SkPictureAnalyzer.h
new file mode 100644
index 0000000000000000000000000000000000000000..fa8cdb1fd18b8c890ec3b65a70ed6ca91d64b0d3
--- /dev/null
+++ b/include/core/SkPictureAnalyzer.h
@@ -0,0 +1,52 @@
+/*
+ * 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"
+
+#if SK_SUPPORT_GPU
+#include "GrContext.h"
+
+class SkPicture;
+
+/** \class SkPictureGpuAnalyzer
+
+     Gathers GPU-related statistics for one or more SkPictures.
+*/
+class SK_API SkPictureGpuAnalyzer final : public SkNoncopyable {
+public:
+    explicit SkPictureGpuAnalyzer(sk_sp<GrContextThreadSafeProxy> = nullptr);

[reed1, 2016/05/13 19:35:47]

Are we really ref-ing the ctx? Do we need the analyzer to outlive the caller's
grcontext?

[f(malita), 2016/05/13 19:46:45]

Hmm, good question: the current use pattern doesn't need a ref (short
lived/one-shot), but maybe going forward we'll want to cache these analyzers -
then holding a ref seems less fragile.

I don't have a strong opinion and at this point a ref doesn't have any
advantage; we can go whichever way you and Brian decide.

+    explicit SkPictureGpuAnalyzer(const sk_sp<SkPicture>& picture,
+                                  sk_sp<GrContextThreadSafeProxy> = nullptr);
+
+    /**
+     *  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(const char** whyNot = nullptr) const;
+
+private:
+    uint32_t fNumSlowPaths;
+
+    typedef SkNoncopyable INHERITED;
+};
+
+#endif // SK_SUPPORT_GPU
+
+#endif // SkPictureAnalyzer_DEFINED