Hello Vulkan Widget Example
The code to set up the Vulkan pipeline and render the triangle is the same as in hellovulkantriangle. In addition, this example demonstrates another feature of QVulkanWindow: reading the image content back from the color buffer into a QImage. By clicking the Grab button, the example renders the next frame and follows it up with a transfer operation in order to get the swapchain color buffer content copied into host accessible memory. The image is then saved to disk via QImage::save().