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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 "headless/lib/browser/protocol/headless_handler.h"
#include <memory>
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "cc/base/switches.h"
#include "components/viz/common/frame_sinks/begin_frame_args.h"
#include "components/viz/common/switches.h"
#include "content/public/common/content_switches.h"
#include "headless/lib/browser/headless_browser_impl.h"
#include "headless/lib/browser/headless_web_contents_impl.h" // nogncheck http://crbug.com/1227378
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/codec/jpeg_codec.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/codec/webp_codec.h"
#include "ui/gfx/image/image.h"
namespace headless {
namespace protocol {
using HeadlessExperimental::ScreenshotParams;
namespace {
constexpr int kDefaultScreenshotQuality = 80;
using BitmapEncoder =
base::RepeatingCallback<bool(const SkBitmap& bitmap,
std::vector<uint8_t>& output)>;
bool EncodeBitmapAsPngSlow(const SkBitmap& bitmap,
std::vector<uint8_t>& output) {
TRACE_EVENT0("devtools", "EncodeBitmapAsPngSlow");
return gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &output);
}
bool EncodeBitmapAsPngFast(const SkBitmap& bitmap,
std::vector<uint8_t>& output) {
TRACE_EVENT0("devtools", "EncodeBitmapAsPngFast");
return gfx::PNGCodec::FastEncodeBGRASkBitmap(bitmap, false, &output);
}
bool EncodeBitmapAsJpeg(int quality,
const SkBitmap& bitmap,
std::vector<uint8_t>& output) {
TRACE_EVENT0("devtools", "EncodeBitmapAsJpeg");
return gfx::JPEGCodec::Encode(bitmap, quality, &output);
}
bool EncodeBitmapAsWebp(int quality,
const SkBitmap& bitmap,
std::vector<uint8_t>& output) {
TRACE_EVENT0("devtools", "EncodeBitmapAsWebp");
return gfx::WebpCodec::Encode(bitmap, quality, &output);
}
absl::variant<protocol::Response, BitmapEncoder>
GetEncoder(const std::string& format, int quality, bool optimize_for_speed) {
if (quality < 0 || quality > 100) {
return Response::InvalidParams(
"screenshot.quality has to be in range 0..100");
}
if (format == ScreenshotParams::FormatEnum::Png) {
return base::BindRepeating(optimize_for_speed ? EncodeBitmapAsPngFast
: EncodeBitmapAsPngSlow);
}
if (format == ScreenshotParams::FormatEnum::Jpeg)
return base::BindRepeating(&EncodeBitmapAsJpeg, quality);
if (format == ScreenshotParams::FormatEnum::Webp)
return base::BindRepeating(&EncodeBitmapAsWebp, quality);
return protocol::Response::InvalidParams("Invalid image format");
}
void OnBeginFrameFinished(
BitmapEncoder encoder,
std::unique_ptr<HeadlessHandler::BeginFrameCallback> callback,
bool has_damage,
std::unique_ptr<SkBitmap> bitmap,
std::string error_message) {
if (!error_message.empty()) {
callback->sendFailure(Response::ServerError(std::move(error_message)));
return;
}
if (!bitmap || bitmap->drawsNothing()) {
callback->sendSuccess(has_damage, Maybe<protocol::Binary>());
return;
}
std::vector<uint8_t> bytes;
bool success = encoder.Run(*bitmap, bytes);
DCHECK(success || bytes.empty());
callback->sendSuccess(has_damage, Binary::fromVector(bytes));
}
} // namespace
HeadlessHandler::HeadlessHandler(HeadlessBrowserImpl* browser,
content::WebContents* web_contents)
: browser_(browser), web_contents_(web_contents) {}
HeadlessHandler::~HeadlessHandler() {}
void HeadlessHandler::Wire(UberDispatcher* dispatcher) {
frontend_ =
std::make_unique<HeadlessExperimental::Frontend>(dispatcher->channel());
HeadlessExperimental::Dispatcher::wire(dispatcher, this);
}
Response HeadlessHandler::Enable() {
return Response::Success();
}
Response HeadlessHandler::Disable() {
return Response::Success();
}
void HeadlessHandler::BeginFrame(Maybe<double> in_frame_time_ticks,
Maybe<double> in_interval,
Maybe<bool> in_no_display_updates,
Maybe<ScreenshotParams> screenshot,
std::unique_ptr<BeginFrameCallback> callback) {
HeadlessWebContentsImpl* headless_contents =
HeadlessWebContentsImpl::From(browser_, web_contents_);
if (!headless_contents->begin_frame_control_enabled()) {
callback->sendFailure(Response::ServerError(
"Command is only supported if BeginFrameControl is enabled."));
return;
}
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
::switches::kRunAllCompositorStagesBeforeDraw)) {
callback->sendFailure(Response::ServerError(
"Command is only supported with "
"--run-all-compositor-stages-before-draw, see "
"https://goo.gle/chrome-headless-rendering for more info."));
return;
}
base::TimeTicks frame_time_ticks;
base::TimeDelta interval;
bool no_display_updates = in_no_display_updates.value_or(false);
if (in_frame_time_ticks.has_value()) {
frame_time_ticks =
base::TimeTicks() + base::Milliseconds(in_frame_time_ticks.value());
} else {
frame_time_ticks = base::TimeTicks::Now();
}
if (in_interval.has_value()) {
double interval_double = in_interval.value();
if (interval_double <= 0) {
callback->sendFailure(
Response::InvalidParams("interval has to be greater than 0"));
return;
}
interval = base::Milliseconds(interval_double);
} else {
interval = viz::BeginFrameArgs::DefaultInterval();
}
base::TimeTicks deadline = frame_time_ticks + interval;
BitmapEncoder encoder;
if (screenshot.has_value()) {
ScreenshotParams& params = screenshot.value();
auto encoder_or_response =
GetEncoder(params.GetFormat(ScreenshotParams::FormatEnum::Png),
params.GetQuality(kDefaultScreenshotQuality),
params.GetOptimizeForSpeed(false));
if (absl::holds_alternative<protocol::Response>(encoder_or_response)) {
callback->sendFailure(absl::get<protocol::Response>(encoder_or_response));
return;
}
encoder = absl::get<BitmapEncoder>(std::move(encoder_or_response));
}
const bool capture_screenshot = !!encoder;
headless_contents->BeginFrame(
frame_time_ticks, deadline, interval, no_display_updates,
capture_screenshot,
base::BindOnce(&OnBeginFrameFinished, std::move(encoder),
std::move(callback)));
}
} // namespace protocol
} // namespace headless
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