1 files changed, 70 insertions, 0 deletions
diff --git a/base/gfx/img_resize_perftest.cc b/base/gfx/img_resize_perftest.cc
new file mode 100644
index 0000000..6a4b070
--- /dev/null
+++ b/base/gfx/img_resize_perftest.cc
@@ -0,0 +1,70 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdlib.h>
+#include <time.h>
+
+#include "base/perftimer.h"
+#include "base/gfx/convolver.h"
+#include "base/gfx/image_operations.h"
+#include "base/gfx/image_resizer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+void FillRandomData(char* dest, int byte_count) {
+  srand(static_cast<unsigned>(time(NULL)));
+  for (int i = 0; i < byte_count; i++)
+    dest[i] = rand() * 255 / RAND_MAX;
+}
+
+}  // namespace
+
+// Old code gives [1521, 1519]ms for this, 4000x4000 -> 2100x2100 lanczos8
+
+TEST(ImageResizePerf, BigFilter) {
+  static const int kSrcWidth = 4000;
+  static const int kSrcHeight = 4000;
+  static const int kSrcByteSize = kSrcWidth * kSrcHeight * 4;
+
+  SkBitmap src_bmp;
+  src_bmp.setConfig(SkBitmap::kARGB_8888_Config, kSrcWidth, kSrcHeight);
+  src_bmp.allocPixels();
+  FillRandomData(reinterpret_cast<char*>(src_bmp.getAddr32(0, 0)),
+                 kSrcByteSize);
+
+  // Make the dest size > 1/2 so the 50% optimization doesn't kick in.
+  static const int kDestWidth = 1400;
+  static const int kDestHeight = 1400;
+
+  PerfTimeLogger resize_timer("resize");
+  gfx::ImageResizer resizer(gfx::ImageResizer::LANCZOS3);
+  SkBitmap dest = resizer.Resize(src_bmp, kDestWidth, kDestHeight);
+}
+
+// The original image filter we were using took 523ms for this test, while this
+// one takes 857ms.
+// TODO(brettw) make this at least 64% faster.
+TEST(ImageOperationPerf, BigFilter) {
+  static const int kSrcWidth = 4000;
+  static const int kSrcHeight = 4000;
+  static const int kSrcByteSize = kSrcWidth * kSrcHeight * 4;
+
+  SkBitmap src_bmp;
+  src_bmp.setConfig(SkBitmap::kARGB_8888_Config, kSrcWidth, kSrcHeight);
+  src_bmp.allocPixels();
+  src_bmp.setIsOpaque(true);
+  FillRandomData(reinterpret_cast<char*>(src_bmp.getAddr32(0, 0)),
+                 kSrcByteSize);
+
+  // Make the dest size > 1/2 so the 50% optimization doesn't kick in.
+  static const int kDestWidth = 1400;
+  static const int kDestHeight = 1400;
+
+  PerfTimeLogger resize_timer("resize");
+  SkBitmap dest = gfx::ImageOperations::Resize(src_bmp,
+      gfx::ImageOperations::RESIZE_LANCZOS3, (float)kDestWidth / (float)kSrcWidth,
+      (float)kDestHeight / (float)kSrcHeight);
+}
+