cef/tests/cefclient/browser/osr_render_handler_win.cc

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// Copyright 2018 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.
#include "tests/cefclient/browser/osr_render_handler_win.h"
#include "include/base/cef_callback.h"
#include "include/wrapper/cef_closure_task.h"
#include "include/wrapper/cef_helpers.h"
#include "tests/shared/browser/util_win.h"
namespace client {
OsrRenderHandlerWin::OsrRenderHandlerWin(const OsrRendererSettings& settings,
HWND hwnd)
: settings_(settings),
hwnd_(hwnd),
begin_frame_pending_(false),
weak_factory_(this) {
CEF_REQUIRE_UI_THREAD();
DCHECK(hwnd_);
}
OsrRenderHandlerWin::~OsrRenderHandlerWin() {
CEF_REQUIRE_UI_THREAD();
}
void OsrRenderHandlerWin::SetBrowser(CefRefPtr<CefBrowser> browser) {
CEF_REQUIRE_UI_THREAD();
browser_ = browser;
if (browser_ && settings_.external_begin_frame_enabled) {
// Start the BeginFrame timer.
Invalidate();
}
}
void OsrRenderHandlerWin::Invalidate() {
CEF_REQUIRE_UI_THREAD();
if (begin_frame_pending_) {
// The timer is already running.
return;
}
// Trigger the BeginFrame timer.
CHECK_GT(settings_.begin_frame_rate, 0);
const float delay_us = (1.0 / double(settings_.begin_frame_rate)) * 1000000.0;
TriggerBeginFrame(0, delay_us);
}
void OsrRenderHandlerWin::TriggerBeginFrame(uint64_t last_time_us,
float delay_us) {
if (begin_frame_pending_ && !settings_.external_begin_frame_enabled) {
// Render immediately and then wait for the next call to Invalidate() or
// On[Accelerated]Paint().
begin_frame_pending_ = false;
Render();
return;
}
const auto now = GetTimeNow();
float offset = now - last_time_us;
if (offset > delay_us) {
offset = delay_us;
}
if (!begin_frame_pending_) {
begin_frame_pending_ = true;
}
// Trigger again after the necessary delay to maintain the desired frame rate.
CefPostDelayedTask(TID_UI,
base::BindOnce(&OsrRenderHandlerWin::TriggerBeginFrame,
weak_factory_.GetWeakPtr(), now, delay_us),
int64(offset / 1000.0));
if (settings_.external_begin_frame_enabled && browser_) {
// We're running the BeginFrame timer. Trigger rendering via
// On[Accelerated]Paint().
browser_->GetHost()->SendExternalBeginFrame();
}
}
} // namespace client