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// Copyright (c) 2009 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 <string.h>
#include <iostream>
#include "chrome/browser/thumbnail_store.h"
#include "base/time.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/gfx/jpeg_codec.h"
#include "base/path_service.h"
#include "base/ref_counted.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/ref_counted_util.h"
#include "chrome/common/thumbnail_score.h"
#include "chrome/tools/profiles/thumbnail-inl.h"
#include "googleurl/src/gurl.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkPixelRef.h"
inline unsigned int diff(unsigned int a, unsigned int b) {
return a>b ? a-b : b-a;
}
class ThumbnailStoreTest : public testing::Test {
public:
ThumbnailStoreTest() : score1_(.5, true, false),
url1_("http://www.google.com"), url2_("http://www.elgoog.com") {
}
~ThumbnailStoreTest() {
}
protected:
void SetUp();
void TearDown() {
file_util::Delete(file_path_.AppendASCII(url1_.host()), false);
file_util::Delete(file_path_.AppendASCII(url2_.host()), false);
}
// Compute the max difference over all pixels for each RGBA component.
void PrintPixelDiff(SkBitmap* image_a, SkBitmap* image_b);
// The directory where ThumbnailStore will store data.
FilePath file_path_;
scoped_ptr<SkBitmap> image_;
scoped_refptr<RefCountedBytes> jpeg_image_;
ThumbnailScore score1_, score2_;
GURL url1_, url2_;
base::Time time_;
};
void ThumbnailStoreTest::SetUp() {
if (!file_util::GetTempDir(&file_path_))
FAIL();
// Delete any old thumbnail files if they exist.
file_util::Delete(file_path_.AppendASCII(url1_.host()), false);
file_util::Delete(file_path_.AppendASCII(url2_.host()), false);
// image is the original SkBitmap representing the thumbnail
image_.reset(JPEGCodec::Decode(kGoogleThumbnail, sizeof(kGoogleThumbnail)));
SkAutoLockPixels thumbnail_lock(*image_);
jpeg_image_ = new RefCountedBytes;
JPEGCodec::Encode(
reinterpret_cast<unsigned char*>(image_->getAddr32(0, 0)),
JPEGCodec::FORMAT_BGRA, image_->width(),
image_->height(),
static_cast<int>(image_->rowBytes()), 90,
&(jpeg_image_->data));
}
void ThumbnailStoreTest::PrintPixelDiff(SkBitmap* image_a, SkBitmap* image_b) {
// Compute the maximum difference in each of the RGBA components across all
// pixels between the retrieved SkBitmap and the original. These
// differences should be small since encoding was done at 90% before
// writing to disk.
if (image_a->height() != image_b->height() ||
image_b->width() != image_b->width() ||
image_a->rowBytes() != image_b->rowBytes())
return;
SkAutoLockPixels lock_a(*image_a);
SkAutoLockPixels lock_b(*image_b);
int ppr = image_a->rowBytesAsPixels();
unsigned int *a, *b;
unsigned int maxv[4];
memset(maxv, 0, sizeof(maxv));
for (int nrows = image_a->height()-1; nrows >= 0; nrows--) {
a = image_a->getAddr32(0, nrows);
b = image_b->getAddr32(0, nrows);
for (int i = 0; i < ppr; i += 4) {
for (int j = 0; j < 4; j++) {
maxv[j] = std::max(diff(*(a+i) >> (j<<3) & 0xff,
*(b+i) >> (j<<3) & 0xff),
maxv[j]);
}
}
}
std::cout << "Max diff btwn original and encoded image (b,g,r,a) = ("
<< maxv[0] << ","
<< maxv[1] << ","
<< maxv[2] << ","
<< maxv[3] << ")" << std::endl;
}
TEST_F(ThumbnailStoreTest, RetrieveFromCache) {
RefCountedBytes* read_image = NULL;
scoped_refptr<ThumbnailStore> store = new ThumbnailStore;
store->file_path_ = file_path_;
store->cache_.reset(new ThumbnailStore::Cache);
store->cache_initialized_ = true;
// Retrieve a thumbnail/score for a nonexistent page.
EXPECT_FALSE(store->GetPageThumbnail(url2_, &read_image));
// Store a thumbnail into the cache and retrieve it.
EXPECT_TRUE(store->SetPageThumbnail(url1_, *image_, score1_, false));
EXPECT_TRUE(store->GetPageThumbnail(url1_, &read_image));
EXPECT_TRUE(score1_.Equals((*store->cache_)[url1_].second));
EXPECT_TRUE(read_image->data.size() == jpeg_image_->data.size());
EXPECT_EQ(0, memcmp(&read_image->data[0], &jpeg_image_->data[0],
jpeg_image_->data.size()));
read_image->Release();
}
TEST_F(ThumbnailStoreTest, RetrieveFromDisk) {
scoped_refptr<RefCountedBytes> read_image = new RefCountedBytes;
scoped_refptr<ThumbnailStore> store = new ThumbnailStore;
store->file_path_ = file_path_;
store->cache_.reset(new ThumbnailStore::Cache);
store->cache_initialized_ = true;
// Store a thumbnail onto the disk and retrieve it.
EXPECT_TRUE(store->SetPageThumbnail(url1_, *image_, score1_, false));
EXPECT_TRUE(store->WriteThumbnailToDisk(url1_));
EXPECT_TRUE(store->GetPageThumbnailFromDisk(
file_path_.AppendASCII(url1_.host()), &url2_, read_image, &score2_));
EXPECT_TRUE(url1_ == url2_);
EXPECT_TRUE(score1_.Equals(score2_));
EXPECT_TRUE(read_image->data.size() == jpeg_image_->data.size());
EXPECT_EQ(0, memcmp(&read_image->data[0], &jpeg_image_->data[0],
jpeg_image_->data.size()));
}
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