transfer_format()

std::optional< ImageFormat > MayaFlux::Portal::Graphics::TextureLoom::transfer_format ( const std::shared_ptr< Core::VKImage > &  image, vk::ImageUsageFlagBits  required_usage  )

staticprivate

Definition at line 1029 of file TextureLoom.cpp.

{
    if (!image || !image->is_initialized()) {
        return std::nullopt;
    }
 
    if (image->get_type() != Core::VKImage::Type::TYPE_2D
        || image->get_depth() != 1 || image->get_array_layers() != 1) {
        return std::nullopt;
    }
 
    if (!static_cast<bool>(image->get_usage_flags() & required_usage)) {
        return std::nullopt;
    }
 
    const auto aspects = image->get_aspect_flags();
    if (static_cast<bool>(aspects & vk::ImageAspectFlagBits::eDepth)
        && static_cast<bool>(aspects & vk::ImageAspectFlagBits::eStencil)) {
        return std::nullopt;
    }
 
    const auto format = from_vulkan_format(image->get_format());
    if (!format) {
        return std::nullopt;
    }
 
    const size_t byte_count = calculate_image_size(image->get_width(), image->get_height(), 1, *format);
    if (byte_count == 0 || byte_count > image->get_size_bytes()) {
        return std::nullopt;
    }
 
    return format;
}

References calculate_image_size(), format, from_vulkan_format(), image, and MayaFlux::Core::VKImage::TYPE_2D.

Referenced by readable_format(), and writable_format().

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