| // Copyright 2013 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/user_data_importer/content/favicon_reencode.h" |
| |
| #include "content/public/child/image_decoder_utils.h" |
| #include "skia/ext/image_operations.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "ui/gfx/codec/png_codec.h" |
| #include "ui/gfx/favicon_size.h" |
| #include "ui/gfx/geometry/size.h" |
| |
| namespace importer { |
| |
| std::optional<std::vector<uint8_t>> ReencodeFavicon( |
| base::span<const uint8_t> src) { |
| // Decode the favicon using WebKit's image decoder. |
| SkBitmap decoded = content::DecodeImage( |
| src, gfx::Size(gfx::kFaviconSize, gfx::kFaviconSize)); |
| if (decoded.empty()) { |
| return std::nullopt; // Unable to decode. |
| } |
| |
| if (decoded.width() != gfx::kFaviconSize || |
| decoded.height() != gfx::kFaviconSize) { |
| // The bitmap is not the correct size, re-sample. |
| int new_width = decoded.width(); |
| int new_height = decoded.height(); |
| gfx::CalculateFaviconTargetSize(&new_width, &new_height); |
| decoded = skia::ImageOperations::Resize( |
| decoded, skia::ImageOperations::RESIZE_LANCZOS3, new_width, new_height); |
| } |
| |
| // Encode our bitmap as a PNG. |
| return gfx::PNGCodec::EncodeBGRASkBitmap(decoded, |
| /*discard_transparency=*/false); |
| } |
| |
| } // namespace importer |
