SkPictureGpuAnalyzer

src/core/SkPictureAnalyzer.cpp

Index: src/core/SkPictureAnalyzer.cpp
diff --git a/src/core/SkPictureAnalyzer.cpp b/src/core/SkPictureAnalyzer.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a9cdff910763b5aceed57183497ccaf010e33ad8
--- /dev/null
+++ b/src/core/SkPictureAnalyzer.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkPicture.h"
+#include "SkPictureAnalyzer.h"
+
+namespace {
+
+inline bool veto_predicate(uint32_t numSlowPaths) {
+    return numSlowPaths > 5;
+}
+
+} // anonymous namespace
+
+SkPictureGpuAnalyzer::SkPictureGpuAnalyzer()
+    : fNumSlowPaths(0) { }
+
+SkPictureGpuAnalyzer::SkPictureGpuAnalyzer(const sk_sp<SkPicture>& picture)
+    : SkPictureGpuAnalyzer() {
+    this->analyze(picture.get());
+}
+
+void SkPictureGpuAnalyzer::analyze(const SkPicture* picture) {
+    if (!picture || veto_predicate(fNumSlowPaths)) {
+        return;
+    }
+
+    fNumSlowPaths += picture->numSlowPaths();
+}
+
+void SkPictureGpuAnalyzer::reset() {
+    fNumSlowPaths = 0;
+}
+
+bool SkPictureGpuAnalyzer::suitableForGpuRasterization(GrContext*, const char** whyNot) const {
+    if(veto_predicate(fNumSlowPaths)) {
+        if (whyNot) { *whyNot = "Too many slow paths (either concave or dashed)."; }
+        return false;
+    }
+    return true;
+}