SkPictureGpuAnalyzer

Stateful helper for gathering multi-picture GPU stats.

Exposes the existing SkPicture GPU veto semantics, while preserving
the SKP impl (which has some nice properties: lazy, hierarchical,
cached per pic).

R=reed@google.com,bsalomon@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1974833003

Review-Url: https://codereview.chromium.org/1974833003

2 files changed, 55 insertions, 0 deletions

diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 44a1e5bdb9..eb35ef6366 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -153,8 +153,10 @@ public:
     static bool InternalOnly_StreamIsSKP(SkStream*, SkPictInfo*);
     static bool InternalOnly_BufferIsSKP(SkReadBuffer*, SkPictInfo*);
 
+#ifdef SK_SUPPORT_LEGACY_PICTURE_GPUVETO
     /** Return true if the picture is suitable for rendering on the GPU.  */
     bool suitableForGpuRasterization(GrContext*, const char** whyNot = NULL) const;
+#endif
 
     // Sent via SkMessageBus from destructor.
     struct DeletionMessage { int32_t fUniqueID; };  // TODO: -> uint32_t?
@@ -190,6 +192,7 @@ private:
     friend class SkPictureData;
 
     virtual int numSlowPaths() const = 0;
+    friend class SkPictureGpuAnalyzer;
     friend struct SkPathCounter;
 
     // V35: Store SkRect (rather then width & height) in header
diff --git a/include/core/SkPictureAnalyzer.h b/include/core/SkPictureAnalyzer.h
new file mode 100644
index 0000000000..fa8cdb1fd1
--- /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);
+    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