rhi: Stop hardcoding the Vulkan backend's desired instance extensions

Instead, have a static function in QRhiVulkanInitParams then Qt Quick
and anyone else who creates a QVulkanInstance that is then used in
combination with QRhi can query.

Change-Id: I046e0d84541fc00f5487a7527c97be262221527f
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

2 files changed, 2 insertions, 3 deletions

diff --git a/tests/manual/rhi/hellominimalcrossgfxtriangle/main.cpp b/tests/manual/rhi/hellominimalcrossgfxtriangle/main.cpp
index 8e04e8303d..a8e1556057 100644
--- a/tests/manual/rhi/hellominimalcrossgfxtriangle/main.cpp
+++ b/tests/manual/rhi/hellominimalcrossgfxtriangle/main.cpp
@@ -138,7 +138,7 @@ int main(int argc, char **argv)
                 "VK_LAYER_LUNARG_swapchain",
                 "VK_LAYER_GOOGLE_unique_objects"});
 #endif
-        inst.setExtensions({ "VK_KHR_get_physical_device_properties2" });
+        inst.setExtensions(QRhiVulkanInitParams::preferredInstanceExtensions());
         if (!inst.create()) {
             qWarning("Failed to create Vulkan instance, switching to OpenGL");
             graphicsApi = QRhi::OpenGLES2;
diff --git a/tests/manual/rhi/shared/examplefw.h b/tests/manual/rhi/shared/examplefw.h
index 282e3ec8d6..228dc2a181 100644
--- a/tests/manual/rhi/shared/examplefw.h
+++ b/tests/manual/rhi/shared/examplefw.h
@@ -549,8 +549,7 @@ int main(int argc, char **argv)
                            << "VK_LAYER_GOOGLE_unique_objects");
 #endif
         }
-        inst.setExtensions(QByteArrayList()
-                           << "VK_KHR_get_physical_device_properties2");
+        inst.setExtensions(QRhiVulkanInitParams::preferredInstanceExtensions());
         if (!inst.create()) {
             qWarning("Failed to create Vulkan instance, switching to OpenGL");
             graphicsApi = OpenGL;