rhi: use Metal when supported on macOS

Fallback to openGL if metal is not supported.

GitLab: jami-project#1413

Change-Id: Id8ac4c817d0b65243becc9963a8bba6621feaf82

CMakeLists.txt

@@ -364,7 +364,10 @@ elseif (NOT APPLE)
 else() # APPLE
     list(APPEND COMMON_SOURCES
                 ${SRC_DIR}/os/macos/updatemanager.mm
-                ${SRC_DIR}/os/macos/connectivitymonitor.mm)
+                ${SRC_DIR}/os/macos/connectivitymonitor.mm
+                ${SRC_DIR}/os/macos/macutils.mm)
+    list(APPEND COMMON_HEADERS
+                ${SRC_DIR}/os/macos/macutils.h)
     if(NOT DEFINED LRC)
         if(EXISTS ${PROJECT_SOURCE_DIR}/../install/lrc)
             set(LRC ${PROJECT_SOURCE_DIR}/../install/lrc)

src/main.cpp

@@ -29,6 +29,9 @@
 #if defined(HAS_VULKAN)
 #include <QVulkanInstance>
 #endif
+#if defined(Q_OS_MACOS)
+#include <os/macos/macutils.h>
+#endif
 
 #include <clocale>
 
@@ -98,9 +101,12 @@ main(int argc, char* argv[])
     auto newArgv = parseInputArgument(argc, argv, qtWebEngineChromiumFlags);
 
     MainApplication app(argc, newArgv);
-
 #if defined(Q_OS_MACOS)
-    QQuickWindow::setGraphicsApi(QSGRendererInterface::MetalRhi);
+    if (macutils::isMetalSupported()) {
+        QQuickWindow::setGraphicsApi(QSGRendererInterface::MetalRhi);
+    } else {
+        QQuickWindow::setGraphicsApi(QSGRendererInterface::OpenGLRhi);
+    }
 #else
     if (std::invoke([] {
 #if defined(HAS_VULKAN)

src/os/macos/macutils.h

+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ * Author: Kateryna Kostiuk   <kateryna.kostiuk@savoirfairelinux.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+class macutils
+{
+public:
+    static bool isMetalSupported();
+};

src/os/macos/macutils.mm

+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ * Author: Kateryna Kostiuk   <kateryna.kostiuk@savoirfairelinux.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "macutils.h"
+
+#include <MetalKit/MetalKit.h>
+
+bool macutils::isMetalSupported() {
+    return ([[MTLCopyAllDevices() autorelease] count] > 0);
+}