{-# language CPP #-}
module Vulkan.Core10.Enums.AttachmentStoreOp  (AttachmentStoreOp( ATTACHMENT_STORE_OP_STORE
                                                                , ATTACHMENT_STORE_OP_DONT_CARE
                                                                , ATTACHMENT_STORE_OP_NONE_QCOM
                                                                , ..
                                                                )) where

import GHC.Read (choose)
import GHC.Read (expectP)
import GHC.Read (parens)
import GHC.Show (showParen)
import GHC.Show (showString)
import GHC.Show (showsPrec)
import Text.ParserCombinators.ReadPrec ((+++))
import Text.ParserCombinators.ReadPrec (prec)
import Text.ParserCombinators.ReadPrec (step)
import Foreign.Storable (Storable)
import Data.Int (Int32)
import GHC.Read (Read(readPrec))
import Text.Read.Lex (Lexeme(Ident))
import Vulkan.Zero (Zero)
-- | VkAttachmentStoreOp - Specify how contents of an attachment are treated
-- at the end of a subpass
--
-- = Description
--
-- Note
--
-- 'ATTACHMENT_STORE_OP_DONT_CARE' /can/ cause contents generated during
-- previous render passes to be discarded before reaching memory, even if
-- no write to the attachment occurs during the current render pass.
--
-- = See Also
--
-- 'Vulkan.Core10.Pass.AttachmentDescription',
-- 'Vulkan.Core12.Promoted_From_VK_KHR_create_renderpass2.AttachmentDescription2'
newtype AttachmentStoreOp = AttachmentStoreOp Int32
  deriving newtype (Eq, Ord, Storable, Zero)

-- | 'ATTACHMENT_STORE_OP_STORE' specifies the contents generated during the
-- render pass and within the render area are written to memory. For
-- attachments with a depth\/stencil format, this uses the access type
-- 'Vulkan.Core10.Enums.AccessFlagBits.ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT'.
-- For attachments with a color format, this uses the access type
-- 'Vulkan.Core10.Enums.AccessFlagBits.ACCESS_COLOR_ATTACHMENT_WRITE_BIT'.
pattern ATTACHMENT_STORE_OP_STORE = AttachmentStoreOp 0
-- | 'ATTACHMENT_STORE_OP_DONT_CARE' specifies the contents within the render
-- area are not needed after rendering, and /may/ be discarded; the
-- contents of the attachment will be undefined inside the render area. For
-- attachments with a depth\/stencil format, this uses the access type
-- 'Vulkan.Core10.Enums.AccessFlagBits.ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT'.
-- For attachments with a color format, this uses the access type
-- 'Vulkan.Core10.Enums.AccessFlagBits.ACCESS_COLOR_ATTACHMENT_WRITE_BIT'.
pattern ATTACHMENT_STORE_OP_DONT_CARE = AttachmentStoreOp 1
-- | 'ATTACHMENT_STORE_OP_NONE_QCOM' specifies that the contents within the
-- render area were not written during rendering, and /may/ not be written
-- to memory. If the attachment was written to during the renderpass, the
-- contents of the attachment will be undefined inside the render area.
pattern ATTACHMENT_STORE_OP_NONE_QCOM = AttachmentStoreOp 1000301000
{-# complete ATTACHMENT_STORE_OP_STORE,
             ATTACHMENT_STORE_OP_DONT_CARE,
             ATTACHMENT_STORE_OP_NONE_QCOM :: AttachmentStoreOp #-}

instance Show AttachmentStoreOp where
  showsPrec p = \case
    ATTACHMENT_STORE_OP_STORE -> showString "ATTACHMENT_STORE_OP_STORE"
    ATTACHMENT_STORE_OP_DONT_CARE -> showString "ATTACHMENT_STORE_OP_DONT_CARE"
    ATTACHMENT_STORE_OP_NONE_QCOM -> showString "ATTACHMENT_STORE_OP_NONE_QCOM"
    AttachmentStoreOp x -> showParen (p >= 11) (showString "AttachmentStoreOp " . showsPrec 11 x)

instance Read AttachmentStoreOp where
  readPrec = parens (choose [("ATTACHMENT_STORE_OP_STORE", pure ATTACHMENT_STORE_OP_STORE)
                            , ("ATTACHMENT_STORE_OP_DONT_CARE", pure ATTACHMENT_STORE_OP_DONT_CARE)
                            , ("ATTACHMENT_STORE_OP_NONE_QCOM", pure ATTACHMENT_STORE_OP_NONE_QCOM)]
                     +++
                     prec 10 (do
                       expectP (Ident "AttachmentStoreOp")
                       v <- step readPrec
                       pure (AttachmentStoreOp v)))