Subset decoding benchmarks

It was my goal to create benchmarks that could measure all
of the use cases that we have identified.  I think single
subsets, translating, and scaling are the important ones.

It might be a good idea to discuss the document in greater
detail as well.  I just wanted to share this to aid the
discussion.
https://docs.google.com/a/google.com/document/d/1OxW96GDMAlw6dnzNXmiNX-F9oDBBlGXzSsgd0DMIkbI/edit?usp=sharing

BUG=skia:

Review URL: https://codereview.chromium.org/1160953002

1 files changed, 35 insertions, 0 deletions

diff --git a/bench/subset/SubsetBenchPriv.h b/bench/subset/SubsetBenchPriv.h
new file mode 100644
index 0000000000..e0eb2ff826
--- /dev/null
+++ b/bench/subset/SubsetBenchPriv.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SubsetBenchPriv_DEFINED
+#define SubsetBenchPriv_DEFINED
+
+#include "SkCodec.h"
+#include "SkData.h"
+#include "SkImageGenerator.h"
+
+/*
+ * Convert the color type to a string
+ */
+static const char* get_color_name(SkColorType colorType) {
+    switch(colorType) {
+        case kN32_SkColorType:
+            return "N32";
+        case kRGB_565_SkColorType:
+            return "565";
+        case kGray_8_SkColorType:
+            return "Gray8";
+        case kIndex_8_SkColorType:
+            return "Index8";
+        case kAlpha_8_SkColorType:
+            return "Alpha8";
+        default:
+            return "Unknown";
+    }
+}
+
+#endif // SubsetBenchPriv_DEFINED