zengine/engine/modules/render/vulkan/src/vulkan_api_help.cpp

#include <tuple>
#include "vkn/vulkan_api_help.h"
namespace vkn {
    using api::ResourceState;
    inline std::tuple<VkAccessFlags, VkAccessFlags, VkPipelineStageFlags, VkPipelineStageFlags,
        VkImageLayout, VkImageLayout>
        getVkTransition(const api::TextureBarrier& barrier) {
        VkAccessFlags srcAccessMask, dstAccessMask;
        VkPipelineStageFlags srcStage, dstStage;

        switch (barrier.mSrcState) {
        case ResourceState::UNDEFINED:
            srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
            srcStage = VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT;
            break;
        case ResourceState::COLOR_ATTACHMENT:
            srcAccessMask = VK_ACCESS_SHADER_READ_BIT | VK_ACCESS_SHADER_WRITE_BIT |
                VK_ACCESS_COLOR_ATTACHMENT_READ_BIT |
                VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
            srcStage = VK_PIPELINE_STAGE_VERTEX_SHADER_BIT | VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT |
                VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
            break;
        case ResourceState::READ_WRITE:
            srcAccessMask = VK_ACCESS_SHADER_READ_BIT | VK_ACCESS_SHADER_WRITE_BIT;
            srcStage = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
            break;
        case ResourceState::READ_ONLY:
            srcAccessMask = VK_ACCESS_SHADER_READ_BIT;
            srcStage = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
            break;
        case ResourceState::TRANSFER_SRC:
            srcAccessMask = VK_ACCESS_TRANSFER_READ_BIT;
            srcStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
            break;
        case ResourceState::TRANSFER_DST:
            srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
            srcStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
            break;
        case ResourceState::DEPTH_ATTACHMENT:
            srcAccessMask = VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
            srcStage = VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT;
            break;
        case ResourceState::DEPTH_SAMPLER:
            srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
            srcStage = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
            break;
        case ResourceState::COLOR_ATTACHMENT_RESOLVE:
            srcAccessMask = VK_ACCESS_TRANSFER_READ_BIT;
            srcStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
            break;
        case ResourceState::PRESENT:
            srcAccessMask = VK_ACCESS_NONE;
            srcStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
            break;
        }

        switch (barrier.mDstState) {
        case ResourceState::COLOR_ATTACHMENT:
            dstAccessMask = VK_ACCESS_SHADER_READ_BIT | VK_ACCESS_SHADER_WRITE_BIT
                | VK_ACCESS_COLOR_ATTACHMENT_READ_BIT
                | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
            dstStage = VK_PIPELINE_STAGE_VERTEX_SHADER_BIT | VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT
                | VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
            break;
        case ResourceState::READ_WRITE:
            dstAccessMask = VK_ACCESS_SHADER_READ_BIT | VK_ACCESS_SHADER_WRITE_BIT;
            dstStage = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
            break;
        case ResourceState::READ_ONLY:
            dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
            dstStage = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT | VK_PIPELINE_STAGE_VERTEX_SHADER_BIT;
            break;
        case ResourceState::TRANSFER_SRC:
            dstAccessMask = VK_ACCESS_TRANSFER_READ_BIT;
            dstStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
            break;
        case ResourceState::TRANSFER_DST:
            dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
            dstStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
            break;
        case ResourceState::DEPTH_ATTACHMENT:
            dstAccessMask = VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT
                | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
            dstStage = VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT;
            break;
        case ResourceState::DEPTH_SAMPLER:
            dstAccessMask =
                VK_ACCESS_SHADER_READ_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
            dstStage = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT |
                VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT;
            break;
        case ResourceState::PRESENT:
        case ResourceState::COLOR_ATTACHMENT_RESOLVE:
        case ResourceState::UNDEFINED:
            dstAccessMask = 0;
            dstStage = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
            break;
        }

        return std::make_tuple(srcAccessMask, dstAccessMask, srcStage, dstStage,
            getVkLayout(transition.oldLayout), getVkLayout(transition.newLayout));
    }
}