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// Copyright (c) 2012 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 "content/test/image_decoder_test.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/md5.h"
#include "base/memory/scoped_ptr.h"
#include "base/path_service.h"
#include "base/strings/pattern.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "third_party/WebKit/public/platform/WebData.h"
#include "third_party/WebKit/public/platform/WebImage.h"
#include "third_party/WebKit/public/platform/WebSize.h"
#include "third_party/WebKit/public/web/WebImageDecoder.h"
// Uncomment this to recalculate the MD5 sums; see header comments.
// #define CALCULATE_MD5_SUMS
namespace {
const int kFirstFrameIndex = 0;
// Determine if we should test with file specified by |path| based
// on |file_selection| and the |threshold| for the file size.
bool ShouldSkipFile(const base::FilePath& path,
ImageDecoderTestFileSelection file_selection,
const int64 threshold) {
if (file_selection == TEST_ALL)
return false;
int64 image_size = 0;
base::GetFileSize(path, &image_size);
return (file_selection == TEST_SMALLER) == (image_size > threshold);
}
} // namespace
void ReadFileToVector(const base::FilePath& path, std::vector<char>* contents) {
std::string raw_image_data;
base::ReadFileToString(path, &raw_image_data);
contents->resize(raw_image_data.size());
memcpy(&contents->front(), raw_image_data.data(), raw_image_data.size());
}
base::FilePath GetMD5SumPath(const base::FilePath& path) {
static const base::FilePath::StringType kDecodedDataExtension(
FILE_PATH_LITERAL(".md5sum"));
return base::FilePath(path.value() + kDecodedDataExtension);
}
#if defined(CALCULATE_MD5_SUMS)
void SaveMD5Sum(const base::FilePath& path, const blink::WebImage& web_image) {
// Calculate MD5 sum.
base::MD5Digest digest;
web_image.getSkBitmap().lockPixels();
base::MD5Sum(web_image.getSkBitmap().getPixels(),
web_image.getSkBitmap().width() *
web_image.getSkBitmap().height() * sizeof(uint32_t),
&digest);
// Write sum to disk.
int bytes_written = base::WriteFile(
path, reinterpret_cast<const char*>(&digest), sizeof digest);
ASSERT_EQ(sizeof digest, bytes_written);
web_image.getSkBitmap().unlockPixels();
}
#endif
#if !defined(CALCULATE_MD5_SUMS)
void VerifyImage(const blink::WebImageDecoder& decoder,
const base::FilePath& path,
const base::FilePath& md5_sum_path,
size_t frame_index) {
// Make sure decoding can complete successfully.
EXPECT_TRUE(decoder.isSizeAvailable()) << path.value();
EXPECT_GE(decoder.frameCount(), frame_index) << path.value();
EXPECT_TRUE(decoder.isFrameCompleteAtIndex(frame_index)) << path.value();
EXPECT_FALSE(decoder.isFailed());
// Calculate MD5 sum.
base::MD5Digest actual_digest;
blink::WebImage web_image = decoder.getFrameAtIndex(frame_index);
web_image.getSkBitmap().lockPixels();
base::MD5Sum(web_image.getSkBitmap().getPixels(),
web_image.getSkBitmap().width() *
web_image.getSkBitmap().height() * sizeof(uint32_t),
&actual_digest);
// Read the MD5 sum off disk.
std::string file_bytes;
base::ReadFileToString(md5_sum_path, &file_bytes);
base::MD5Digest expected_digest;
ASSERT_EQ(sizeof expected_digest, file_bytes.size()) << path.value();
memcpy(&expected_digest, file_bytes.data(), sizeof expected_digest);
// Verify that the sums are the same.
EXPECT_EQ(0, memcmp(&expected_digest, &actual_digest, sizeof actual_digest))
<< path.value();
web_image.getSkBitmap().unlockPixels();
}
#endif
void ImageDecoderTest::SetUp() {
base::FilePath data_dir;
ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &data_dir));
data_dir_ = data_dir.AppendASCII("webkit").AppendASCII("data").AppendASCII(
format_ + "_decoder");
if (!base::PathExists(data_dir_)) {
const testing::TestInfo* const test_info =
testing::UnitTest::GetInstance()->current_test_info();
VLOG(0) << test_info->name()
<< " not running because test data wasn't found.";
data_dir_.clear();
return;
}
}
std::vector<base::FilePath> ImageDecoderTest::GetImageFiles() const {
std::string pattern = "*." + format_;
base::FileEnumerator enumerator(data_dir_, false,
base::FileEnumerator::FILES);
std::vector<base::FilePath> image_files;
for (base::FilePath next_file_name = enumerator.Next();
!next_file_name.empty(); next_file_name = enumerator.Next()) {
base::FilePath base_name = next_file_name.BaseName();
#if defined(OS_WIN)
std::string base_name_ascii = base::UTF16ToASCII(base_name.value());
#else
std::string base_name_ascii = base_name.value();
#endif
if (base::MatchPattern(base_name_ascii, pattern))
image_files.push_back(next_file_name);
}
return image_files;
}
bool ImageDecoderTest::ShouldImageFail(const base::FilePath& path) const {
const base::FilePath::StringType kBadSuffix(FILE_PATH_LITERAL(".bad."));
return (path.value().length() > (kBadSuffix.length() + format_.length()) &&
!path.value().compare(path.value().length() - format_.length() -
kBadSuffix.length(),
kBadSuffix.length(), kBadSuffix));
}
void ImageDecoderTest::TestDecoding(
ImageDecoderTestFileSelection file_selection,
const int64 threshold) {
if (data_dir_.empty())
return;
const std::vector<base::FilePath> image_files(GetImageFiles());
for (std::vector<base::FilePath>::const_iterator i = image_files.begin();
i != image_files.end(); ++i) {
if (!ShouldSkipFile(*i, file_selection, threshold))
TestWebKitImageDecoder(*i, GetMD5SumPath(*i), kFirstFrameIndex);
}
}
void ImageDecoderTest::TestWebKitImageDecoder(
const base::FilePath& image_path,
const base::FilePath& md5_sum_path,
int desired_frame_index) const {
#if defined(CALCULATE_MD5_SUMS)
// If we're just calculating the MD5 sums, skip failing images quickly.
if (ShouldImageFail(image_path))
return;
#endif
std::vector<char> image_contents;
ReadFileToVector(image_path, &image_contents);
EXPECT_TRUE(image_contents.size());
scoped_ptr<blink::WebImageDecoder> decoder(CreateWebKitImageDecoder());
EXPECT_FALSE(decoder->isFailed());
#if !defined(CALCULATE_MD5_SUMS)
// Test chunking file into half.
const int partial_size = image_contents.size()/2;
blink::WebData partial_data(
reinterpret_cast<const char*>(&(image_contents.at(0))), partial_size);
// Make Sure the image decoder doesn't fail when we ask for the frame
// buffer for this partial image.
// NOTE: We can't check that frame 0 is non-NULL, because if this is an
// ICO and we haven't yet supplied enough data to read the directory,
// there is no framecount and thus no first frame.
decoder->setData(const_cast<blink::WebData&>(partial_data), false);
EXPECT_FALSE(decoder->isFailed()) << image_path.value();
#endif
// Make sure passing the complete image results in successful decoding.
blink::WebData data(reinterpret_cast<const char*>(&(image_contents.at(0))),
image_contents.size());
decoder->setData(const_cast<blink::WebData&>(data), true);
if (ShouldImageFail(image_path)) {
EXPECT_FALSE(decoder->isFrameCompleteAtIndex(kFirstFrameIndex));
EXPECT_TRUE(decoder->isFailed());
} else {
EXPECT_FALSE(decoder->isFailed()) << image_path.value();
#if defined(CALCULATE_MD5_SUMS)
SaveMD5Sum(md5_sum_path, decoder->getFrameAtIndex(desired_frame_index));
#else
VerifyImage(*decoder, image_path, md5_sum_path, desired_frame_index);
#endif
}
}
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