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/*
* Copyright (C) 2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "GraphicsContextGLANGLEEGLUtilities.h"
#include "ANGLEHeaders.h"
#include <wtf/Assertions.h>
#if ENABLE(WEBGL) && USE(ANGLE)
namespace WebCore {
static unsigned defaultDisplayRefCount;
static void* defaultDisplay = nullptr;
static void refDefaultDisplay(void* display)
{
ASSERT(display != nullptr);
ASSERT(defaultDisplay == display || (!defaultDisplay && !defaultDisplayRefCount));
defaultDisplayRefCount++;
defaultDisplay = display;
}
static void unrefDefaultDisplayIfNeeded(void* display)
{
if (!display)
return;
ASSERT(defaultDisplay == display);
ASSERT(defaultDisplayRefCount);
defaultDisplayRefCount--;
}
ScopedEGLDefaultDisplay& ScopedEGLDefaultDisplay::operator=(ScopedEGLDefaultDisplay&& other)
{
if (this != &other) {
unrefDefaultDisplayIfNeeded(m_display);
m_display = std::exchange(other.m_display, nullptr);
}
return *this;
}
ScopedEGLDefaultDisplay::ScopedEGLDefaultDisplay(void* display)
: m_display(display)
{
refDefaultDisplay(m_display);
}
ScopedEGLDefaultDisplay::~ScopedEGLDefaultDisplay()
{
unrefDefaultDisplayIfNeeded(m_display);
}
void ScopedEGLDefaultDisplay::releaseAllResourcesIfUnused()
{
if (defaultDisplayRefCount)
return;
if (defaultDisplay == nullptr)
return;
bool result = EGL_Terminate(defaultDisplay);
ASSERT_UNUSED(result, result);
result = EGL_ReleaseThread();
ASSERT_UNUSED(result, result);
defaultDisplay = nullptr;
}
}
#endif
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