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/*
* Copyright (C) 2024 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "GLFenceEGL.h"
#if HAVE(GL_FENCE)
#include "GLDisplay.h"
#include <wtf/Vector.h>
#if USE(LIBEPOXY)
#include <epoxy/egl.h>
#else
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#endif
namespace WebCore {
static std::unique_ptr<GLFence> createEGLFence(const GLDisplay& display, EGLenum type, const Vector<EGLAttrib>& attributes)
{
EGLSync sync = nullptr;
if (display.checkVersion(1, 5))
sync = eglCreateSync(display.eglDisplay(), type, attributes.isEmpty() ? nullptr : attributes.span().data());
else {
Vector<EGLint> intAttributes = attributes.map<Vector<EGLint>>([] (EGLAttrib value) {
return value;
});
sync = eglCreateSyncKHR(display.eglDisplay(), type, intAttributes.isEmpty() ? nullptr : intAttributes.span().data());
}
if (sync == EGL_NO_SYNC)
return nullptr;
glFlush();
#if OS(UNIX)
bool isExportable = type == EGL_SYNC_NATIVE_FENCE_ANDROID;
#else
bool isExportable = false;
#endif
return makeUnique<GLFenceEGL>(display, sync, isExportable);
}
std::unique_ptr<GLFence> GLFenceEGL::create(const GLDisplay& display)
{
return createEGLFence(display, EGL_SYNC_FENCE_KHR, { });
}
#if OS(UNIX)
std::unique_ptr<GLFence> GLFenceEGL::createExportable(const GLDisplay& display)
{
return createEGLFence(display, EGL_SYNC_NATIVE_FENCE_ANDROID, { });
}
std::unique_ptr<GLFence> GLFenceEGL::importFD(const GLDisplay& display, UnixFileDescriptor&& fd)
{
Vector<EGLAttrib> attributes = {
EGL_SYNC_NATIVE_FENCE_FD_ANDROID, fd.release(),
EGL_NONE
};
return createEGLFence(display, EGL_SYNC_NATIVE_FENCE_ANDROID, attributes);
}
#endif
GLFenceEGL::GLFenceEGL(const GLDisplay& display, EGLSyncKHR sync, [[maybe_unused]] bool isExportable)
: m_display(display)
, m_sync(sync)
#if OS(UNIX)
, m_isExportable(isExportable)
#endif
{
}
GLFenceEGL::~GLFenceEGL()
{
auto display = m_display.get();
if (!display)
return;
if (display->checkVersion(1, 5))
eglDestroySync(display->eglDisplay(), m_sync);
else
eglDestroySyncKHR(display->eglDisplay(), m_sync);
}
void GLFenceEGL::clientWait()
{
auto display = m_display.get();
if (!display)
return;
if (display->checkVersion(1, 5))
eglClientWaitSync(display->eglDisplay(), m_sync, 0, EGL_FOREVER);
else
eglClientWaitSyncKHR(display->eglDisplay(), m_sync, 0, EGL_FOREVER_KHR);
}
void GLFenceEGL::serverWait()
{
auto display = m_display.get();
if (!display)
return;
if (display->checkVersion(1, 5))
eglWaitSync(display->eglDisplay(), m_sync, 0);
else {
if (display->extensions().KHR_wait_sync)
eglWaitSyncKHR(display->eglDisplay(), m_sync, 0);
else
eglClientWaitSyncKHR(display->eglDisplay(), m_sync, 0, EGL_FOREVER_KHR);
}
}
#if OS(UNIX)
UnixFileDescriptor GLFenceEGL::exportFD()
{
if (!m_isExportable)
return { };
auto display = m_display.get();
if (!display)
return { };
return UnixFileDescriptor { eglDupNativeFenceFDANDROID(display->eglDisplay(), m_sync), UnixFileDescriptor::Adopt };
}
#endif
} // namespace WebCore
#endif // HAVE(GL_FENCE)
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