spirv_type_to_vk_format()

vk::Format MayaFlux::Core::VKShaderModule::spirv_type_to_vk_format ( const spirv_cross::SPIRType &  type )

staticprivate

Convert SPIRV-Cross type to Vulkan vertex attribute format.

Parameters

type	SPIR-V type information

Returns

Corresponding Vulkan format

Definition at line 613 of file VKShaderModule.cpp.

{
    using BaseType = spirv_cross::SPIRType::BaseType;
 
    if (type.columns > 1) {
        MF_WARN(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Matrix types are not valid vertex attributes (columns={})",
            type.columns);
        return vk::Format::eUndefined;
    }
 
    if (type.width != 32) {
        MF_WARN(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Unsupported SPIR-V vertex attribute width {} (only 32-bit supported)",
            type.width);
        return vk::Format::eUndefined;
    }
 
    const uint32_t vec_size = type.vecsize;
    if (type.basetype == BaseType::Float) {
        switch (vec_size) {
        case 1:
            return vk::Format::eR32Sfloat;
        case 2:
            return vk::Format::eR32G32Sfloat;
        case 3:
            return vk::Format::eR32G32B32Sfloat;
        case 4:
            return vk::Format::eR32G32B32A32Sfloat;
        }
    } else if (type.basetype == BaseType::Int) {
        switch (vec_size) {
        case 1:
            return vk::Format::eR32Sint;
        case 2:
            return vk::Format::eR32G32Sint;
        case 3:
            return vk::Format::eR32G32B32Sint;
        case 4:
            return vk::Format::eR32G32B32A32Sint;
        }
    } else if (type.basetype == BaseType::UInt) {
        switch (vec_size) {
        case 1:
            return vk::Format::eR32Uint;
        case 2:
            return vk::Format::eR32G32Uint;
        case 3:
            return vk::Format::eR32G32B32Uint;
        case 4:
            return vk::Format::eR32G32B32A32Uint;
        }
    }
 
    MF_WARN(Journal::Component::Core, Journal::Context::GraphicsBackend,
        "Unsupported SPIR-V vertex attribute type (basetype={}, vecsize={})",
        static_cast<int>(type.basetype), vec_size);
 
    return vk::Format::eUndefined;
}

References MayaFlux::Journal::Core, MayaFlux::Journal::GraphicsBackend, and MF_WARN.

Referenced by reflect_spirv().

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