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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/glic/host/context/glic_screenshot_capturer.h"
#include <memory>
#include <utility>
#include "base/logging.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/thread_pool.h"
#include "base/time/time.h"
#include "chrome/browser/glic/resources/grit/glic_browser_resources.h"
#include "chrome/browser/media/webrtc/desktop_media_picker_controller.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/common/chrome_features.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_widget_host_view.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/gfx/codec/jpeg_codec.h"
namespace glic {
namespace {
// Helper used to convert the captured DesktopFrame to a JPEG.
std::vector<uint8_t> ConvertFrameToJpeg(
std::unique_ptr<webrtc::DesktopFrame> frame) {
CHECK(frame);
SkImageInfo image_info =
SkImageInfo::Make(frame->size().width(), frame->size().height(),
kBGRA_8888_SkColorType, kPremul_SkAlphaType);
SkBitmap sk_bitmap;
if (!sk_bitmap.tryAllocPixels(image_info)) {
return {};
}
SkPixmap pixmap(image_info, frame->data(), frame->stride());
if (!sk_bitmap.writePixels(pixmap)) {
return {};
}
auto start_time = base::Time::Now();
auto jpeg_data = gfx::JPEGCodec::Encode(
sk_bitmap, features::kGlicScreenshotEncodeQuality.Get());
if (!jpeg_data.has_value()) {
return {};
}
auto encode_time = base::Time::Now() - start_time;
VLOG(1) << "JPEGCodec::Encode() frame size: " << frame->size().width() << "x"
<< frame->size().height();
VLOG(1) << "JPEGCodec::Encode() time: " << encode_time;
VLOG(1) << "JPEGCodec::Encode() result file size: " << jpeg_data->size();
return std::move(*jpeg_data);
}
} // namespace
GlicScreenshotCapturer::GlicScreenshotCapturer() = default;
GlicScreenshotCapturer::~GlicScreenshotCapturer() = default;
void GlicScreenshotCapturer::CaptureScreenshot(
gfx::NativeWindow parent_window,
glic::mojom::WebClientHandler::CaptureScreenshotCallback callback) {
if (capture_callback_) {
std::move(callback).Run(mojom::CaptureScreenshotResult::NewErrorReason(
glic::mojom::CaptureScreenshotErrorReason::
kScreenCaptureRequestThrottled));
return;
}
capture_callback_ = std::move(callback);
if (!parent_window) {
SignalError(glic::mojom::CaptureScreenshotErrorReason::kUnknown);
return;
}
// Construct picker.
picker_controller_ = std::make_unique<DesktopMediaPickerController>();
const std::u16string name(
l10n_util::GetStringUTF16(IDS_GLIC_SCREEN_PICKER_REQUESTER));
DesktopMediaPickerController::Params picker_params(
DesktopMediaPickerController::Params::RequestSource::kGlic);
picker_params.context = parent_window;
picker_params.parent = parent_window;
picker_params.app_name = name;
picker_params.target_name = name;
picker_params.request_audio = false;
picker_params.restricted_by_policy = false;
DesktopMediaList::WebContentsFilter includable_web_contents_filter =
base::BindRepeating([](content::WebContents* wc) { return false; });
DesktopMediaPickerController::DoneCallback source_selected_callback =
base::BindOnce(&GlicScreenshotCapturer::OnSourceSelected,
weak_ptr_factory_.GetWeakPtr());
picker_controller_->Show(picker_params, {DesktopMediaList::Type::kScreen},
includable_web_contents_filter,
std::move(source_selected_callback));
}
void GlicScreenshotCapturer::CloseScreenPicker() {
picker_controller_.reset();
if (capture_callback_) {
SignalError(glic::mojom::CaptureScreenshotErrorReason::
kUserCancelledScreenPickerDialog);
}
}
void GlicScreenshotCapturer::OnSourceSelected(const std::string& err,
content::DesktopMediaID id) {
picker_controller_ = nullptr;
if (!err.empty()) {
DVLOG(1) << "Unknown error while selecting source: " << err;
SignalError(glic::mojom::CaptureScreenshotErrorReason::kUnknown);
return;
}
if (id.is_null()) {
SignalError(glic::mojom::CaptureScreenshotErrorReason::
kUserCancelledScreenPickerDialog);
return;
}
#if BUILDFLAG(IS_WIN)
// TODO(crbug.com/405177421): Remove this delay once we land the code to skip
// the screen picker entirely on Windows.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&GlicScreenshotCapturer::OnCaptureStarted,
weak_ptr_factory_.GetWeakPtr(), id),
base::Milliseconds(500));
#else
OnCaptureStarted(id);
#endif
}
void GlicScreenshotCapturer::OnCaptureStarted(content::DesktopMediaID id) {
desktop_capturer_ = content::desktop_capture::CreateScreenCapturer();
desktop_capturer_->Start(this);
if (!desktop_capturer_->SelectSource(id.id)) {
SignalError(glic::mojom::CaptureScreenshotErrorReason::kUnknown);
return;
}
desktop_capturer_->CaptureFrame();
}
void GlicScreenshotCapturer::OnCaptureResult(
webrtc::DesktopCapturer::Result result,
std::unique_ptr<webrtc::DesktopFrame> frame) {
if (!frame) {
SignalError(glic::mojom::CaptureScreenshotErrorReason::kUnknown);
return;
}
frame_size_ = frame->size();
// Encode frame to JPEG off thread.
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, base::BindOnce(&ConvertFrameToJpeg, std::move(frame)),
base::BindOnce(&GlicScreenshotCapturer::SignalScreenshotResult,
weak_ptr_factory_.GetWeakPtr()));
}
void GlicScreenshotCapturer::SignalScreenshotResult(
std::vector<uint8_t> jpeg_data) {
if (jpeg_data.empty()) {
DVLOG(1) << "Could not convert frame to JPEG";
SignalError(glic::mojom::CaptureScreenshotErrorReason::kUnknown);
return;
}
mojom::ScreenshotPtr screenshot = mojom::Screenshot::New();
screenshot->width_pixels = frame_size_.width();
screenshot->height_pixels = frame_size_.height();
screenshot->mime_type = "image/jpeg";
screenshot->data = std::move(jpeg_data);
screenshot->origin_annotations = mojom::ImageOriginAnnotations::New();
std::move(capture_callback_)
.Run(
mojom::CaptureScreenshotResult::NewScreenshot(std::move(screenshot)));
}
void GlicScreenshotCapturer::SignalError(
glic::mojom::CaptureScreenshotErrorReason error_reason) {
std::move(capture_callback_)
.Run(mojom::CaptureScreenshotResult::NewErrorReason(error_reason));
}
// static
std::vector<uint8_t> GlicScreenshotCapturer::ConvertFrameToJpegForTesting(
std::unique_ptr<webrtc::DesktopFrame> frame) {
return ConvertFrameToJpeg(std::move(frame));
}
} // namespace glic
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