[QTBUG-83072] Vulkan under QML example renders incorrectly with MoltenVK - Qt Bug Tracker

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Details

Type: Bug
Status: Closed
Priority: P2: Important
Resolution: Cannot Reproduce
Affects Version/s: 5.15.0 Beta2
Fix Version/s: 6.0
Component/s: GUI: Vulkan, Qt RHI
Labels:
None
Environment:
macOS Catalina 10.15.3 on MacBook Pro with Intel Iris Plus Graphics 655 1536 MB

MoltenVK 1.1.130 (from the corresponding LunarG Vulkan SDKs).

Platform/s:

macOS

Description

The Vulkan under QML example renders incorrectly: While the animation is displayed correctly, artefacts occur and the text is butchered. The shape of the artefact changes every time the program executed, but remains constant during execution.

I'm running macOS Catalina with MoltenVK 1.1.130 (LunarG Vulkan SDK) and Qt 5.15.0 beta2. I changed the example's {main.cpp} in order to use classic QML type registration (I don't use QtCreator):

#include <QGuiApplication>
#include <QtQuick/QQuickView>

#include "vulkansquircle.h"

int main(int argc, char **argv)
{
    QGuiApplication app(argc, argv);

    qmlRegisterType<VulkanSquircle>("VulkanUnderQML", 1, 0, "VulkanSquircle");
                                                                                                                                                                                                                  
    // This example needs Vulkan. It will not run otherwise.                                                                                                                                                      
    QQuickWindow::setSceneGraphBackend(QSGRendererInterface::VulkanRhi);

    QQuickView view;
    view.setResizeMode(QQuickView::SizeRootObjectToView);
    view.setSource(QUrl("qrc:///scenegraph/vulkanunderqml/main.qml"));
    view.show();

    return app.exec();
}