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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 "chrome/browser/ash/lobster/lobster_image_provider_from_memory.h"
#include "ash/public/cpp/lobster/lobster_image_candidate.h"
#include "base/no_destructor.h"
#include "base/strings/strcat.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/codec/jpeg_codec.h"
#include "ui/gfx/geometry/size.h"
namespace {
constexpr gfx::Size kPreviewImageSize = gfx::Size(512, 512);
constexpr gfx::Size kFullImageSize = gfx::Size(1024, 1024);
constexpr base::TimeDelta kMultipleImagesFetchDelay = base::Seconds(3);
constexpr base::TimeDelta kSingleImageFetchDelay = base::Seconds(1);
const SkBitmap CreateTestBitmap(int width, int height) {
SkBitmap bitmap;
bitmap.allocN32Pixels(width, height);
bitmap.eraseColor(SK_ColorMAGENTA);
return bitmap;
}
const std::string GetTestJpgBytes(const SkBitmap& bitmap) {
std::optional<std::vector<uint8_t>> encoded_data =
gfx::JPEGCodec::Encode(bitmap, /*quality=*/50);
return std::string(base::as_string_view(encoded_data.value()));
}
ash::LobsterResult CreateTestingLobsterResult(
LobsterCandidateIdGenerator* id_generator,
const std::string& user_query,
const std::string& rewritten_query,
int num_candidates,
const gfx::Size& image_dimensions) {
CHECK(id_generator);
std::vector<ash::LobsterImageCandidate> image_candidates;
for (int index = 0; index < num_candidates; ++index) {
image_candidates.push_back(ash::LobsterImageCandidate(
id_generator->GenerateNextId(),
std::string(GetTestJpgBytes(CreateTestBitmap(
image_dimensions.width(), image_dimensions.height()))),
static_cast<uint32_t>(index), user_query, rewritten_query));
}
return image_candidates;
}
} // namespace
LobsterImageProviderFromMemory::LobsterImageProviderFromMemory(
LobsterCandidateIdGenerator* id_generator)
: id_generator_(id_generator) {}
LobsterImageProviderFromMemory::~LobsterImageProviderFromMemory() = default;
void LobsterImageProviderFromMemory::RequestMultipleCandidates(
const std::string& query,
int num_candidates,
ash::RequestCandidatesCallback callback) {
ash::LobsterResult results = CreateTestingLobsterResult(
id_generator_, /*user_query=*/query,
/*rewritten_query=*/base::StrCat({"rewritten: ", query}), num_candidates,
kPreviewImageSize);
delay_timer_.Start(FROM_HERE, kMultipleImagesFetchDelay,
base::BindOnce(
[](const ash::LobsterResult results,
ash::RequestCandidatesCallback result_callback) {
std::move(result_callback).Run(results);
},
results, std::move(callback)));
}
void LobsterImageProviderFromMemory::RequestSingleCandidateWithSeed(
const std::string& query,
uint32_t seed,
ash::RequestCandidatesCallback callback) {
ash::LobsterResult results = CreateTestingLobsterResult(
id_generator_, /*user_query=*/query,
/*rewritten_query=*/base::StrCat({"rewritten: ", query}),
/*num_candidates=*/1, kFullImageSize);
delay_timer_.Start(FROM_HERE, kSingleImageFetchDelay,
base::BindOnce(
[](const ash::LobsterResult results,
ash::RequestCandidatesCallback result_callback) {
std::move(result_callback).Run(results);
},
results, std::move(callback)));
}
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