Export the QVulkanInstancePrivate class

When needs by the QVulkanInstance::setVkInstance to use a existing
VkInstance to a QQuickWindow, the VkInstance maybe is from a non Qt
render system, in the case, the QPlatformVulkanInstance object of
QVulkanInstance is can't create from the QPA, the all vulkan information
is need get from the VkInstance owner(eg, getInstanceProcAddr). But
providing it with a public interface is not a good idea, so by exporting
a private class, you can use a private interface where needed to achieve
the above purpose.

Task-number: QTBUG-103021
Change-Id: I0312adcf55cfd7d49889ed112ab237c0b3ab3ef6
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gui/vulkan/qvulkaninstance.h b/src/gui/vulkan/qvulkaninstance.h
index bfdaf1ab69..156d6cebfc 100644
--- a/src/gui/vulkan/qvulkaninstance.h
+++ b/src/gui/vulkan/qvulkaninstance.h
@@ -223,6 +223,7 @@ public:
     void removeDebugOutputFilter(DebugFilter filter);
 
 private:
+    friend class QVulkanInstancePrivate;
     QScopedPointer<QVulkanInstancePrivate> d_ptr;
     Q_DISABLE_COPY(QVulkanInstance)
 };