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// 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 "chrome/browser/offline_pages/visuals_decoder_impl.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "components/image_fetcher/core/image_decoder.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/image/image_skia_operations.h"
namespace offline_pages {
namespace {
const gfx::Size kPreferredFaviconSize = gfx::Size(64, 64);
gfx::Image CropSquare(const gfx::Image& image) {
if (image.IsEmpty())
return image;
const gfx::ImageSkia* skimage = image.ToImageSkia();
gfx::Rect bounds{{0, 0}, skimage->size()};
int size = std::min(bounds.width(), bounds.height());
bounds.ClampToCenteredSize({size, size});
return gfx::Image(gfx::ImageSkiaOperations::CreateTiledImage(
*skimage, bounds.x(), bounds.y(), bounds.width(), bounds.height()));
}
} // namespace
VisualsDecoderImpl::VisualsDecoderImpl(
std::unique_ptr<image_fetcher::ImageDecoder> decoder)
: image_decoder_(std::move(decoder)) {
CHECK(image_decoder_);
}
VisualsDecoderImpl::~VisualsDecoderImpl() = default;
void VisualsDecoderImpl::DecodeAndCropImage(const std::string& thumbnail_data,
DecodeComplete complete_callback) {
auto callback = base::BindOnce(
[](VisualsDecoder::DecodeComplete complete_callback,
const gfx::Image& image) {
if (image.IsEmpty()) {
std::move(complete_callback).Run(image);
return;
}
std::move(complete_callback).Run(CropSquare(image));
},
std::move(complete_callback));
// kPreferredFaviconSize only has an effect for images with multiple frames
// (.ico) and shouldn't make a difference for thumbnails.
image_decoder_->DecodeImage(thumbnail_data, kPreferredFaviconSize,
/*data_decoder=*/nullptr, std::move(callback));
}
} // namespace offline_pages
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