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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/icon_util.h"
#include "base/base64.h"
#include "base/memory/ref_counted_memory.h"
#include "extensions/browser/extension_icon_placeholder.h"
#include "extensions/common/constants.h"
#include "skia/public/mojom/bitmap.mojom.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/image/image_skia_rep.h"
#include "ui/gfx/image/image_skia_source.h"
#include "url/gurl.h"
namespace extensions {
// The icon size parsed should always be the same as the icon size of the
// extension action.
// LINT.IfChange(ActionIconSize)
constexpr int kActionIconSize = extension_misc::EXTENSION_ICON_BITTY;
// LINT.ThenChange(/extensions/browser/extension_action.cc:ActionIconSize)
IconParseResult ParseIconFromCanvasDictionary(const base::Value::Dict& dict,
gfx::ImageSkia* icon) {
for (const auto item : dict) {
std::string byte_string;
const void* bytes = nullptr;
size_t num_bytes = 0;
if (item.second.is_blob()) {
bytes = item.second.GetBlob().data();
num_bytes = item.second.GetBlob().size();
} else if (item.second.is_string()) {
if (!base::Base64Decode(item.second.GetString(), &byte_string)) {
return IconParseResult::kDecodeFailure;
}
bytes = byte_string.c_str();
num_bytes = byte_string.length();
} else {
continue;
}
SkBitmap bitmap;
if (!skia::mojom::InlineBitmap::Deserialize(bytes, num_bytes, &bitmap)) {
return IconParseResult::kUnpickleFailure;
}
// A well-behaved renderer will never send a null bitmap to us here.
CHECK(!bitmap.isNull());
// Chrome helpfully scales the provided icon(s), but let's not go overboard.
const int kActionIconMaxSize = 10 * kActionIconSize;
if (bitmap.drawsNothing() || bitmap.width() > kActionIconMaxSize) {
continue;
}
float scale = static_cast<float>(bitmap.width()) / kActionIconSize;
icon->AddRepresentation(gfx::ImageSkiaRep(bitmap, scale));
}
return IconParseResult::kSuccess;
}
GURL GetPlaceholderIconUrl(extension_misc::ExtensionIcons icon_size,
const std::string& name) {
return GetIconUrlFromImage(
ExtensionIconPlaceholder::CreateImage(icon_size, name));
}
GURL GetIconUrlFromImage(const gfx::Image& image) {
std::string base_64 = base::Base64Encode(*image.As1xPNGBytes());
const char kDataUrlPrefix[] = "data:image/png;base64,";
return GURL(kDataUrlPrefix + base_64);
}
} // namespace extensions
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