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Diffstat (limited to 'src/core/compositor/compositor_resource_fence.cpp')
| -rw-r--r-- | src/core/compositor/compositor_resource_fence.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/core/compositor/compositor_resource_fence.cpp b/src/core/compositor/compositor_resource_fence.cpp new file mode 100644 index 000000000..7fc5fbfb2 --- /dev/null +++ b/src/core/compositor/compositor_resource_fence.cpp @@ -0,0 +1,158 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWebEngine module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "compositor_resource_fence.h" + +#include "ui/gl/gl_context.h" + +#include <QtGui/qopenglcontext.h> + +#ifndef GL_TIMEOUT_IGNORED +#define GL_TIMEOUT_IGNORED 0xFFFFFFFFFFFFFFFFull +#endif + +namespace QtWebEngineCore { + +void CompositorResourceFence::wait() +{ + if (!m_sync) + return; + + QOpenGLContext *context = QOpenGLContext::currentContext(); + Q_ASSERT(context); + + // Chromium uses its own GL bindings and stores in in thread local storage. + // For that reason, let chromium_gpu_helper.cpp contain the producing code that will run in the Chromium + // GPU thread, and put the sync consuming code here that will run in the QtQuick SG or GUI thread. + switch (m_sync.type) { + case gl::TransferableFence::NoSync: + break; + case gl::TransferableFence::EglSync: +#ifdef EGL_KHR_reusable_sync + { + static bool resolved = false; + static PFNEGLCLIENTWAITSYNCKHRPROC eglClientWaitSyncKHR = 0; + + if (!resolved) { + if (gl::GLSurfaceQt::HasEGLExtension("EGL_KHR_fence_sync")) + eglClientWaitSyncKHR = (PFNEGLCLIENTWAITSYNCKHRPROC)context->getProcAddress("eglClientWaitSyncKHR"); + resolved = true; + } + + if (eglClientWaitSyncKHR) + // FIXME: Use the less wasteful eglWaitSyncKHR once we have a device that supports EGL_KHR_wait_sync. + eglClientWaitSyncKHR(m_sync.egl.display, m_sync.egl.sync, 0, EGL_FOREVER_KHR); + } +#endif + break; + case gl::TransferableFence::ArbSync: + typedef void (QOPENGLF_APIENTRYP WaitSyncPtr)(GLsync sync, GLbitfield flags, GLuint64 timeout); + static WaitSyncPtr glWaitSync_ = 0; + if (!glWaitSync_) { + glWaitSync_ = (WaitSyncPtr)context->getProcAddress("glWaitSync"); + Q_ASSERT(glWaitSync_); + } + glWaitSync_(m_sync.arb.sync, 0, GL_TIMEOUT_IGNORED); + break; + } + + release(); +} + +void CompositorResourceFence::release() +{ + if (!m_sync) + return; + + QOpenGLContext *context = QOpenGLContext::currentContext(); + if (!context) + return; + + // Chromium uses its own GL bindings and stores in in thread local storage. + // For that reason, let chromium_gpu_helper.cpp contain the producing code that will run in the Chromium + // GPU thread, and put the sync consuming code here that will run in the QtQuick SG or GUI thread. + switch (m_sync.type) { + case gl::TransferableFence::NoSync: + break; + case gl::TransferableFence::EglSync: +#ifdef EGL_KHR_reusable_sync + { + static bool resolved = false; + static PFNEGLDESTROYSYNCKHRPROC eglDestroySyncKHR = 0; + + if (!resolved) { + if (gl::GLSurfaceQt::HasEGLExtension("EGL_KHR_fence_sync")) + eglDestroySyncKHR = (PFNEGLDESTROYSYNCKHRPROC)context->getProcAddress("eglDestroySyncKHR"); + resolved = true; + } + + if (eglDestroySyncKHR) { + // FIXME: Use the less wasteful eglWaitSyncKHR once we have a device that supports EGL_KHR_wait_sync. + eglDestroySyncKHR(m_sync.egl.display, m_sync.egl.sync); + m_sync.reset(); + } + } +#endif + break; + case gl::TransferableFence::ArbSync: + typedef void (QOPENGLF_APIENTRYP DeleteSyncPtr)(GLsync sync); + static DeleteSyncPtr glDeleteSync_ = 0; + if (!glDeleteSync_) { + glDeleteSync_ = (DeleteSyncPtr)context->getProcAddress("glDeleteSync"); + Q_ASSERT(glDeleteSync_); + } + glDeleteSync_(m_sync.arb.sync); + m_sync.reset(); + break; + } + // If Chromium was able to create a sync, we should have been able to handle its type here too. + Q_ASSERT(!m_sync); +} + +// static +scoped_refptr<CompositorResourceFence> CompositorResourceFence::create() +{ + if (gl::GLContext::GetCurrent() && gl::GLFence::IsSupported()) { + std::unique_ptr<gl::GLFence> glFence{gl::GLFence::Create()}; + return base::MakeRefCounted<CompositorResourceFence>(glFence->Transfer()); + } + return nullptr; +} + +} // namespace QtWebEngineCore |