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content / browser / background_fetch / storage / image_helpers.cc [blame]
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/background_fetch/storage/image_helpers.h"
#include "base/functional/bind.h"
#include "base/memory/ref_counted_memory.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "ui/gfx/image/image.h"
namespace content {
namespace background_fetch {
namespace {
// The max icon resolution, this is used as a threshold to decide
// whether the icon should be persisted.
constexpr int kMaxIconResolution = 256 * 256;
std::string ConvertAndSerializeIcon(const SkBitmap& icon) {
auto icon_bytes = gfx::Image::CreateFrom1xBitmap(icon).As1xPNGBytes();
return std::string(base::as_string_view(*icon_bytes));
}
SkBitmap DeserializeAndConvertIcon(
std::unique_ptr<std::string> serialized_icon) {
return gfx::Image::CreateFrom1xPNGBytes(base::as_byte_span(*serialized_icon))
.AsBitmap();
}
} // namespace
bool ShouldPersistIcon(const SkBitmap& icon) {
return !icon.isNull() && (icon.height() * icon.width() <= kMaxIconResolution);
}
void SerializeIcon(const SkBitmap& icon, SerializeIconCallback callback) {
DCHECK(!icon.isNull());
// Do the serialization on a seperate thread to avoid blocking on
// expensive operations (image conversions), then post back to current
// thread and continue normally.
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE,
{base::MayBlock(), base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN,
base::TaskPriority::BEST_EFFORT},
base::BindOnce(&ConvertAndSerializeIcon, icon), std::move(callback));
}
void DeserializeIcon(std::unique_ptr<std::string> serialized_icon,
DeserializeIconCallback callback) {
DCHECK(serialized_icon);
// Do the deserialization on a seperate thread to avoid blocking on
// expensive operations (image conversions), then post back to current
// thread and continue normally.
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE,
{base::MayBlock(), base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN,
base::TaskPriority::BEST_EFFORT},
base::BindOnce(&DeserializeAndConvertIcon, std::move(serialized_icon)),
std::move(callback));
}
} // namespace background_fetch
} // namespace content