Add texture compression interface and ETC1 encoder.

cc/resources/texture_compressor_perftest.cc

Index: cc/resources/texture_compressor_perftest.cc
diff --git a/cc/resources/texture_compressor_perftest.cc b/cc/resources/texture_compressor_perftest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7d68bd6f5f3d9415e2d14de53de87fd4f860935f
--- /dev/null
+++ b/cc/resources/texture_compressor_perftest.cc
@@ -0,0 +1,103 @@
+// Copyright 2015 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 "base/logging.h"
+#include "cc/debug/lap_timer.h"
+#include "cc/resources/texture_compressor.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/perf/perf_test.h"
+
+namespace cc {
+namespace {
+
+const int kTimeLimitMillis = 2000;
+const int kWarmupRuns = 5;
+const int kTimeCheckInterval = 10;
+
+const int kImageWidth = 256;
+const int kImageHeight = 256;
+const int kImageSizeInBytes = kImageWidth * kImageHeight * 4;
+
+const TextureCompressor::Quality kQualities[] = {
+    TextureCompressor::kQualityLow,
+    TextureCompressor::kQualityMedium,
+    TextureCompressor::kQualityHigh};
+
+std::string FormatName(TextureCompressor::Format format) {
+  switch (format) {
+    case TextureCompressor::kFormatETC1:
+      return "ETC1";
+  }
+
+  NOTREACHED();
+  return "";
+}
+
+std::string QualityName(TextureCompressor::Quality quality) {
+  switch (quality) {
+    case TextureCompressor::kQualityLow:
+      return "Low";
+    case TextureCompressor::kQualityMedium:
+      return "Medium";
+    case TextureCompressor::kQualityHigh:
+      return "High";
+  }
+
+  NOTREACHED();
+  return "";
+}
+
+class TextureCompressorPerfTest
+    : public testing::TestWithParam<TextureCompressor::Format> {
+ public:
+  TextureCompressorPerfTest()
+      : timer_(kWarmupRuns,
+               base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
+               kTimeCheckInterval) {}
+
+  void SetUp() override {
+    TextureCompressor::Format format = GetParam();
+    compressor_ = TextureCompressor::Create(format);
+  }
+
+  void RunTest(const std::string& name, TextureCompressor::Quality quality) {
+    timer_.Reset();
+    do {
+      compressor_->Compress(src_, dst_, kImageWidth, kImageHeight, quality);
+      timer_.NextLap();
+    } while (!timer_.HasTimeLimitExpired());
+
+    std::string str = FormatName(GetParam()) + " " + QualityName(quality);
+    perf_test::PrintResult("Compress256x256", name, str, timer_.MsPerLap(),
+                           "us", true);
+  }
+
+ protected:
+  LapTimer timer_;
+  scoped_ptr<TextureCompressor> compressor_;
+  uint8_t src_[kImageSizeInBytes];
+  uint8_t dst_[kImageSizeInBytes];
+};
+
+TEST_P(TextureCompressorPerfTest, Compress256x256Image) {
+  for (int i = 0; i < kImageSizeInBytes; ++i)
+    src_[i] = i % 256;
+
+  for (auto& quality : kQualities)
+    RunTest("Image", quality);
+}
+
+TEST_P(TextureCompressorPerfTest, Compress256x256SolidImage) {
+  memset(src_, 0, kImageSizeInBytes);
+
+  for (auto& quality : kQualities)
+    RunTest("SolidImage", quality);
+}
+
+INSTANTIATE_TEST_CASE_P(TextureCompressorPerfTests,
+                        TextureCompressorPerfTest,
+                        ::testing::Values(TextureCompressor::kFormatETC1));
+
+}  // namespace
+}  // namespace cc