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** This file is part of the QtWebEngine module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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#include "surface_factory_qt.h"

#include "type_conversion.h"

#include "base/files/file_path.h"
#include "base/native_library.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_implementation_linux.h"

#include <QGuiApplication>
#include <qpa/qplatformnativeinterface.h>

#if defined(USE_OZONE) || defined(OS_ANDROID)
#include <EGL/egl.h>

#ifndef QT_LIBDIR_EGL
#define QT_LIBDIR_EGL "/usr/lib"
#endif
#ifndef QT_LIBDIR_GLES2
#define QT_LIBDIR_GLES2 QT_LIBDIR_EGL
#endif

bool SurfaceFactoryQt::LoadEGLGLES2Bindings(AddGLLibraryCallback add_gl_library, SetGLGetProcAddressProcCallback set_gl_get_proc_address)
{
#if defined(OS_ANDROID)
    // This is done in gl_implementation_android.cc for now. We might need to switch if we
    // start supporting the emulator platform but that would be a more intrusive change.
    Q_UNREACHABLE();
    return false;
#else
    base::FilePath libEGLPath = toFilePath(QT_LIBDIR_EGL);
    libEGLPath = libEGLPath.Append("libEGL.so");
    base::NativeLibrary eglLibrary = gfx::LoadLibrary(libEGLPath);
    if (!eglLibrary) {
        LOG(ERROR) << "Failed to load EGL: " << libEGLPath.LossyDisplayName();
        return false;
    }

    base::FilePath libGLES2Path = toFilePath(QT_LIBDIR_GLES2);
    libGLES2Path = libGLES2Path.Append("libGLESv2.so");
    base::NativeLibrary gles2Library = gfx::LoadLibrary(libGLES2Path);
    if (!gles2Library) {
        LOG(ERROR) << "failed to load GLESv2: " << libGLES2Path.LossyDisplayName();
        return false;
    }

    gfx::GLGetProcAddressProc get_proc_address = reinterpret_cast<gfx::GLGetProcAddressProc>(base::GetFunctionPointerFromNativeLibrary(eglLibrary, "eglGetProcAddress"));
    if (!get_proc_address) {
        LOG(ERROR) << "eglGetProcAddress not found.";
        base::UnloadNativeLibrary(eglLibrary);
        base::UnloadNativeLibrary(gles2Library);
        return false;
    }

    gfx::SetGLGetProcAddressProc(get_proc_address);
    gfx::AddGLNativeLibrary(eglLibrary);
    gfx::AddGLNativeLibrary(gles2Library);
    return true;
#endif
}

intptr_t SurfaceFactoryQt::GetNativeDisplay()
{
    static void *display = qApp->platformNativeInterface()->nativeResourceForIntegration(QByteArrayLiteral("nativedisplay"));

    if (display)
        return reinterpret_cast<intptr_t>(display);

    return reinterpret_cast<intptr_t>(EGL_DEFAULT_DISPLAY);
}

#endif