Method setupDepthImage

examples/vulkan/Vulkan.cpp:1654–1759

Create our depth image and transition it into the proper layout

    // Create our depth image and transition it into the proper layout
    void setupDepthImage()
    {
        // Create our depth image
        if (!createImage(swapchainExtent.width,
                         swapchainExtent.height,
                         depthFormat,
                         VK_IMAGE_TILING_OPTIMAL,
                         VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT,
                         VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
                         depthImage,
                         depthImageMemory))
        {
            vulkanAvailable = false;
            return;
        }

        // Allocate a command buffer
        VkCommandBufferAllocateInfo commandBufferAllocateInfo = VkCommandBufferAllocateInfo();
        commandBufferAllocateInfo.sType                       = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
        commandBufferAllocateInfo.level                       = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
        commandBufferAllocateInfo.commandPool                 = commandPool;
        commandBufferAllocateInfo.commandBufferCount          = 1;

        VkCommandBuffer commandBuffer = nullptr;

        if (vkAllocateCommandBuffers(device, &commandBufferAllocateInfo, &commandBuffer) != VK_SUCCESS)
        {
            vulkanAvailable = false;
            return;
        }

        // Begin the command buffer
        VkCommandBufferBeginInfo commandBufferBeginInfo = VkCommandBufferBeginInfo();
        commandBufferBeginInfo.sType                    = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
        commandBufferBeginInfo.flags                    = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;

        VkSubmitInfo submitInfo       = VkSubmitInfo();
        submitInfo.sType              = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        submitInfo.commandBufferCount = 1;
        submitInfo.pCommandBuffers    = &commandBuffer;

        if (vkBeginCommandBuffer(commandBuffer, &commandBufferBeginInfo) != VK_SUCCESS)
        {
            vkFreeCommandBuffers(device, commandPool, 1, &commandBuffer);

            vulkanAvailable = false;
            return;
        }

        // Submit a barrier to transition the image layout to depth stencil optimal
        VkImageMemoryBarrier barrier        = VkImageMemoryBarrier();
        barrier.sType                       = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
        barrier.oldLayout                   = VK_IMAGE_LAYOUT_UNDEFINED;
        barrier.newLayout                   = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
        barrier.srcQueueFamilyIndex         = VK_QUEUE_FAMILY_IGNORED;
        barrier.dstQueueFamilyIndex         = VK_QUEUE_FAMILY_IGNORED;
        barrier.image                       = depthImage;
        barrier.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT |