How to implement dynamic rendering via vkCmdBeginRendering?

[ariaci]

Hi,

I want to implement DepthPeeling like proposed in chapter 5 of "The Modern Vulkan Cookbook" to handle transparencies correctly.
I'm using DepthPeeling because it seems to be a good middle way between memory- and performance-requirements.

Does vsg support dynamic rendering using vkCmdBeginRendering?

It seems that the current implementation of GraphicsPipeline::Implementation does not support rendering without a valid renderpass and so binding and creating pipeline without a renderpass is not possible.
I think supporting dynamic rendering would improve handling of dynamic situations like transparency handling drastically.

src\vsg\state\GraphicsPipeline.cpp:

////////////////////////////////////////////////////////////////////////
//
// GraphicsPipeline::Implementation
//
GraphicsPipeline::Implementation::Implementation(Context& context, Device* device, const RenderPass* renderPass, const PipelineLayout* pipelineLayout, const ShaderStages& shaderStages, const GraphicsPipelineStates& pipelineStates, uint32_t subpass) :
    _device(device)
{
    VkGraphicsPipelineCreateInfo pipelineInfo = {};
    pipelineInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
    pipelineInfo.layout = pipelineLayout->vk(device->deviceID);
    pipelineInfo.renderPass = *renderPass;  // <= no renderpass results in crash
    pipelineInfo.subpass = subpass;
    pipelineInfo.basePipelineHandle = VK_NULL_HANDLE;
    pipelineInfo.pNext = nullptr;

    ...
}

Khronos states that there is no need for a render pass soon as the pNext-list of VkGraphicsPipelineCreateInfo contains a valid VkPipelineRenderingCreateInfo-structure ...

Is there another way to handle dynamic rendering or shall I describe a render pass having multiple sub-passes?

Thanks in advance.