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/*
* Copyright (C) 2015 Igalia S.L
*
* 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 AND ITS CONTRIBUTORS "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 OR ITS 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 "PlatformDisplay.h"
#include "GLContext.h"
#include <cstdlib>
#include <mutex>
#include <wtf/HashSet.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/TZoneMallocInlines.h>
#if PLATFORM(WIN)
#include "PlatformDisplayWin.h"
#endif
#if USE(LIBEPOXY)
#include <epoxy/egl.h>
#else
#include <EGL/egl.h>
#include <EGL/eglext.h>
#endif
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(PlatformDisplay);
#if PLATFORM(WIN)
PlatformDisplay& PlatformDisplay::sharedDisplay()
{
// ANGLE D3D renderer isn't thread-safe. Don't destruct it on non-main threads which calls _exit().
static PlatformDisplay* display = PlatformDisplayWin::create().release();
return *display;
}
#else
IGNORE_CLANG_WARNINGS_BEGIN("exit-time-destructors")
static std::unique_ptr<PlatformDisplay> s_sharedDisplay;
IGNORE_CLANG_WARNINGS_END
void PlatformDisplay::setSharedDisplay(std::unique_ptr<PlatformDisplay>&& display)
{
RELEASE_ASSERT(!s_sharedDisplay);
s_sharedDisplay = WTFMove(display);
}
PlatformDisplay& PlatformDisplay::sharedDisplay()
{
RELEASE_ASSERT(s_sharedDisplay);
return *s_sharedDisplay;
}
PlatformDisplay* PlatformDisplay::sharedDisplayIfExists()
{
return s_sharedDisplay.get();
}
#endif
static UncheckedKeyHashSet<PlatformDisplay*>& eglDisplays()
{
static NeverDestroyed<UncheckedKeyHashSet<PlatformDisplay*>> displays;
return displays;
}
PlatformDisplay::PlatformDisplay(std::unique_ptr<GLDisplay>&& glDisplay)
: m_eglDisplay(WTFMove(glDisplay))
{
RELEASE_ASSERT(m_eglDisplay);
eglDisplays().add(this);
#if !PLATFORM(WIN)
static bool eglAtexitHandlerInitialized = false;
if (!eglAtexitHandlerInitialized) {
// EGL registers atexit handlers to cleanup its global display list.
// Since the global PlatformDisplay instance is created before,
// when the PlatformDisplay destructor is called, EGL has already removed the
// display from the list, causing eglTerminate() to crash. So, here we register
// our own atexit handler, after EGL has been initialized and after the global
// instance has been created to ensure we call eglTerminate() before the other
// EGL atexit handlers and the PlatformDisplay destructor.
// See https://bugs.webkit.org/show_bug.cgi?id=157973.
eglAtexitHandlerInitialized = true;
std::atexit([] {
while (!eglDisplays().isEmpty()) {
auto* display = eglDisplays().takeAny();
display->terminateEGLDisplay();
}
});
}
#endif
}
PlatformDisplay::~PlatformDisplay()
{
if (eglDisplays().remove(this))
m_eglDisplay->terminate();
}
GLContext* PlatformDisplay::sharingGLContext()
{
if (!m_sharingGLContext)
m_sharingGLContext = GLContext::createSharing(*this);
return m_sharingGLContext.get();
}
void PlatformDisplay::clearSharingGLContext()
{
#if USE(SKIA)
invalidateSkiaGLContexts();
#endif
#if ENABLE(VIDEO) && USE(GSTREAMER_GL)
m_gstGLContext = nullptr;
#endif
#if ENABLE(WEBGL) && !PLATFORM(WIN)
clearANGLESharingGLContext();
#endif
m_sharingGLContext = nullptr;
}
EGLDisplay PlatformDisplay::eglDisplay() const
{
return m_eglDisplay->eglDisplay();
}
bool PlatformDisplay::eglCheckVersion(int major, int minor) const
{
return m_eglDisplay->checkVersion(major, minor);
}
const GLDisplay::Extensions& PlatformDisplay::eglExtensions() const
{
return m_eglDisplay->extensions();
}
void PlatformDisplay::terminateEGLDisplay()
{
#if ENABLE(VIDEO) && USE(GSTREAMER_GL)
m_gstGLDisplay = nullptr;
#endif
clearSharingGLContext();
m_eglDisplay->terminate();
}
EGLImage PlatformDisplay::createEGLImage(EGLContext context, EGLenum target, EGLClientBuffer clientBuffer, const Vector<EGLAttrib>& attributes) const
{
return m_eglDisplay->createImage(context, target, clientBuffer, attributes);
}
bool PlatformDisplay::destroyEGLImage(EGLImage image) const
{
return m_eglDisplay->destroyImage(image);
}
#if USE(GBM)
const Vector<GLDisplay::DMABufFormat>& PlatformDisplay::dmabufFormats()
{
return m_eglDisplay->dmabufFormats();
}
#if USE(GSTREAMER)
const Vector<GLDisplay::DMABufFormat>& PlatformDisplay::dmabufFormatsForVideo()
{
return m_eglDisplay->dmabufFormatsForVideo();
}
#endif
#endif // USE(GBM)
} // namespace WebCore
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