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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 "chrome/common/chrome_paths.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_;
SkBitmap read_image_, image_enc_dec_, 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_ = *(JPEGCodec::Decode(kGoogleThumbnail, sizeof(kGoogleThumbnail)));
// The ThumbnailStore will encode the thumbnail to jpeg at 90% quality, so
// we do this to image. When image is stored, image_enc_dec_ is what
// ThumbnailStore should return.
std::vector<unsigned char> jpeg_data;
SkAutoLockPixels thumbnail_lock(image_);
bool encoded = JPEGCodec::Encode(
reinterpret_cast<unsigned char*>(image_.getAddr32(0, 0)),
JPEGCodec::FORMAT_BGRA, image_.width(),
image_.height(),
static_cast<int>(image_.rowBytes()), 90,
&jpeg_data);
image_enc_dec_ = *(JPEGCodec::Decode(
reinterpret_cast<const unsigned char*>(&jpeg_data[0]),
jpeg_data.size()));
}
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.
SkAutoLockPixels lock_a(*image_a);
SkAutoLockPixels lock_b(*image_b);
int ppr = read_image_.rowBytesAsPixels();
unsigned int *a, *b;
unsigned int maxv[4];
memset(maxv, 0, sizeof(maxv));
for (int nrows = read_image_.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) {
ThumbnailStore* store = new ThumbnailStore;
store->AddRef();
store->file_path_ = file_path_;
store->cache_.reset(new ThumbnailStore::Cache);
store->cache_initialized_ = true;
read_image_.reset();
// Retrieve a thumbnail/score for a nonexistent page.
EXPECT_FALSE(store->GetPageThumbnail(url2_, &read_image_, &score2_));
// Store a thumbnail into the cache and retrieve it.
EXPECT_TRUE(store->SetPageThumbnail(url1_, image_, score1_, false));
EXPECT_TRUE(store->GetPageThumbnail(url1_, &read_image_, &score2_));
EXPECT_TRUE(score1_.Equals(score2_));
EXPECT_TRUE(read_image_.getSize() == image_.getSize());
EXPECT_TRUE(read_image_.pixelRef() == image_.pixelRef());
EXPECT_FALSE(read_image_.isNull());
store->Release();
}
TEST_F(ThumbnailStoreTest, RetrieveFromDisk) {
ThumbnailStore* store = new ThumbnailStore;
store->AddRef();
store->file_path_ = file_path_;
store->cache_.reset(new ThumbnailStore::Cache);
store->cache_initialized_ = true;
read_image_.reset();
// 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_.getSize() == image_enc_dec_.getSize());
EXPECT_FALSE(read_image_.isNull());
// The retrieved SkBitmap should be the same as the original image
// encoded at 90% quality to jpeg, then decoded.
{
SkAutoLockPixels lock_a(read_image_);
SkAutoLockPixels lock_b(image_enc_dec_);
EXPECT_TRUE(0 == memcmp(read_image_.getPixels(),
image_enc_dec_.getPixels(),
read_image_.getSize()));
}
PrintPixelDiff(&read_image_, &image_);
store->Release();
}
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