Function IsValidPlaneAspect

layers/utils/image_utils.cpp:211–222

vkspec.html#formats-planes-image-aspect

// vkspec.html#formats-planes-image-aspect
bool IsValidPlaneAspect(VkFormat format, VkImageAspectFlags aspect_mask) {
    const uint32_t planes = vkuFormatPlaneCount(format);
    constexpr VkImageAspectFlags valid_planes =
        VK_IMAGE_ASPECT_PLANE_0_BIT | VK_IMAGE_ASPECT_PLANE_1_BIT | VK_IMAGE_ASPECT_PLANE_2_BIT;

    if (((aspect_mask & valid_planes) == aspect_mask) && (aspect_mask != 0)) {
        if ((planes == 3) || ((planes == 2) && ((aspect_mask & VK_IMAGE_ASPECT_PLANE_2_BIT) == 0))) {
            return true;
        }
    }
    return false;  // Expects calls to make sure it is a multi-planar format
}

bool IsOnlyOneValidPlaneAspect(VkFormat format, VkImageAspectFlags aspect_mask) {
    const bool multiple_bits = aspect_mask != 0 && !IsPowerOfTwo(aspect_mask);