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