VkBlendFactor

typedef enum VkBlendFactor {
    VK_BLEND_FACTOR_ZERO = 0,
    VK_BLEND_FACTOR_ONE = 1,
    VK_BLEND_FACTOR_SRC_COLOR = 2,
    VK_BLEND_FACTOR_ONE_MINUS_SRC_COLOR = 3,
    VK_BLEND_FACTOR_DST_COLOR = 4,
    VK_BLEND_FACTOR_ONE_MINUS_DST_COLOR = 5,
    VK_BLEND_FACTOR_SRC_ALPHA = 6,
    VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA = 7,
    VK_BLEND_FACTOR_DST_ALPHA = 8,
    VK_BLEND_FACTOR_ONE_MINUS_DST_ALPHA = 9,
    VK_BLEND_FACTOR_CONSTANT_COLOR = 10,
    VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR = 11,
    VK_BLEND_FACTOR_CONSTANT_ALPHA = 12,
    VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA = 13,
    VK_BLEND_FACTOR_SRC_ALPHA_SATURATE = 14,
    VK_BLEND_FACTOR_SRC1_COLOR = 15,
    VK_BLEND_FACTOR_ONE_MINUS_SRC1_COLOR = 16,
    VK_BLEND_FACTOR_SRC1_ALPHA = 17,
    VK_BLEND_FACTOR_ONE_MINUS_SRC1_ALPHA = 18,
} VkBlendFactor;

pub struct BlendFactor(u32);
impl BlendFactor {
    pub const ZERO: Self = 0;
    pub const ONE: Self = 1;
    pub const SRC_COLOR: Self = 2;
    pub const ONE_MINUS_SRC_COLOR: Self = 3;
    pub const DST_COLOR: Self = 4;
    pub const ONE_MINUS_DST_COLOR: Self = 5;
    pub const SRC_ALPHA: Self = 6;
    pub const ONE_MINUS_SRC_ALPHA: Self = 7;
    pub const DST_ALPHA: Self = 8;
    pub const ONE_MINUS_DST_ALPHA: Self = 9;
    pub const CONSTANT_COLOR: Self = 10;
    pub const ONE_MINUS_CONSTANT_COLOR: Self = 11;
    pub const CONSTANT_ALPHA: Self = 12;
    pub const ONE_MINUS_CONSTANT_ALPHA: Self = 13;
    pub const SRC_ALPHA_SATURATE: Self = 14;
    pub const SRC1_COLOR: Self = 15;
    pub const ONE_MINUS_SRC1_COLOR: Self = 16;
    pub const SRC1_ALPHA: Self = 17;
    pub const ONE_MINUS_SRC1_ALPHA: Self = 18;
}