transition_image_layout()

void MayaFlux::Core::BackendResourceManager::transition_image_layout	(	vk::Image	image,
		vk::ImageLayout	old_layout,
		vk::ImageLayout	new_layout,
		uint32_t	mip_levels = 1,
		uint32_t	array_layers = 1,
		vk::ImageAspectFlags	aspect_flags = vk::ImageAspectFlagBits::eColor
	)

Transition image layout using a pipeline barrier.

Parameters

image	VkImage handle
old_layout	Current layout
new_layout	Target layout
mip_levels	Number of mip levels to transition
array_layers	Number of array layers to transition

Executes immediately on graphics queue. Use for initial setup and one-off transitions. For rendering, prefer manual barriers.

Definition at line 432 of file BackendResoureManager.cpp.

{
    execute_immediate_commands([&](vk::CommandBuffer cmd) {
        vk::ImageMemoryBarrier barrier {};
        barrier.oldLayout = old_layout;
        barrier.newLayout = new_layout;
        barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
        barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
        barrier.image = image;
        barrier.subresourceRange.aspectMask = aspect_flags;
        barrier.subresourceRange.baseMipLevel = 0;
        barrier.subresourceRange.levelCount = mip_levels;
        barrier.subresourceRange.baseArrayLayer = 0;
        barrier.subresourceRange.layerCount = array_layers;
 
        vk::PipelineStageFlags src_stage;
        vk::PipelineStageFlags dst_stage;
 
        if (old_layout == vk::ImageLayout::eUndefined && new_layout == vk::ImageLayout::eTransferDstOptimal) {
            barrier.srcAccessMask = vk::AccessFlags {};
            barrier.dstAccessMask = vk::AccessFlagBits::eTransferWrite;
            src_stage = vk::PipelineStageFlagBits::eTopOfPipe;
            dst_stage = vk::PipelineStageFlagBits::eTransfer;
        } else if (old_layout == vk::ImageLayout::eTransferDstOptimal && new_layout == vk::ImageLayout::eShaderReadOnlyOptimal) {
            barrier.srcAccessMask = vk::AccessFlagBits::eTransferWrite;
            barrier.dstAccessMask = vk::AccessFlagBits::eShaderRead;
            src_stage = vk::PipelineStageFlagBits::eTransfer;
            dst_stage = vk::PipelineStageFlagBits::eFragmentShader;
        } else if (old_layout == vk::ImageLayout::eUndefined && new_layout == vk::ImageLayout::eShaderReadOnlyOptimal) {
            barrier.srcAccessMask = vk::AccessFlags {};
            barrier.dstAccessMask = vk::AccessFlagBits::eShaderRead;
            src_stage = vk::PipelineStageFlagBits::eTopOfPipe;
            dst_stage = vk::PipelineStageFlagBits::eFragmentShader;
        } else if (old_layout == vk::ImageLayout::eUndefined && new_layout == vk::ImageLayout::eColorAttachmentOptimal) {
            barrier.srcAccessMask = vk::AccessFlags {};
            barrier.dstAccessMask = vk::AccessFlagBits::eColorAttachmentWrite;
            src_stage = vk::PipelineStageFlagBits::eTopOfPipe;
            dst_stage = vk::PipelineStageFlagBits::eColorAttachmentOutput;
        } else if (old_layout == vk::ImageLayout::eUndefined && new_layout == vk::ImageLayout::eDepthStencilAttachmentOptimal) {
            barrier.srcAccessMask = vk::AccessFlags {};
            barrier.dstAccessMask = vk::AccessFlagBits::eDepthStencilAttachmentRead | vk::AccessFlagBits::eDepthStencilAttachmentWrite;
            src_stage = vk::PipelineStageFlagBits::eTopOfPipe;
            dst_stage = vk::PipelineStageFlagBits::eEarlyFragmentTests;
        } else if (old_layout == vk::ImageLayout::eUndefined && new_layout == vk::ImageLayout::eGeneral) {
            barrier.srcAccessMask = vk::AccessFlags {};
            barrier.dstAccessMask = vk::AccessFlagBits::eShaderRead | vk::AccessFlagBits::eShaderWrite;
            src_stage = vk::PipelineStageFlagBits::eTopOfPipe;
            dst_stage = vk::PipelineStageFlagBits::eComputeShader;
        } else {
            barrier.srcAccessMask = vk::AccessFlagBits::eMemoryRead | vk::AccessFlagBits::eMemoryWrite;
            barrier.dstAccessMask = vk::AccessFlagBits::eMemoryRead | vk::AccessFlagBits::eMemoryWrite;
            src_stage = vk::PipelineStageFlagBits::eAllCommands;
            dst_stage = vk::PipelineStageFlagBits::eAllCommands;
 
            MF_WARN(Journal::Component::Core, Journal::Context::GraphicsBackend,
                "Using generic image layout transition");
        }
 
        cmd.pipelineBarrier(
            src_stage, dst_stage,
            vk::DependencyFlags {},
            0, nullptr, // Memory barriers
            0, nullptr, // Buffer barriers
            1, &barrier // Image barriers
        );
    });
 
    MF_DEBUG(Journal::Component::Core, Journal::Context::GraphicsBackend,
        "Image layout transitioned: {} -> {}",
        vk::to_string(old_layout), vk::to_string(new_layout));
}

References MayaFlux::Journal::Core, execute_immediate_commands(), MayaFlux::Journal::GraphicsBackend, MF_DEBUG, and MF_WARN.

Referenced by MayaFlux::Portal::Graphics::TextureLoom::create_2d(), MayaFlux::Portal::Graphics::TextureLoom::create_3d(), MayaFlux::Portal::Graphics::TextureLoom::create_cubemap(), MayaFlux::Portal::Graphics::TextureLoom::create_depth_buffer(), MayaFlux::Portal::Graphics::TextureLoom::create_render_target(), and MayaFlux::Portal::Graphics::TextureLoom::create_storage_image().

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