{-# language CPP #-}
module Graphics.Vulkan.Extensions.VK_NV_clip_space_w_scaling  ( cmdSetViewportWScalingNV
                                                              , ViewportWScalingNV(..)
                                                              , PipelineViewportWScalingStateCreateInfoNV(..)
                                                              , NV_CLIP_SPACE_W_SCALING_SPEC_VERSION
                                                              , pattern NV_CLIP_SPACE_W_SCALING_SPEC_VERSION
                                                              , NV_CLIP_SPACE_W_SCALING_EXTENSION_NAME
                                                              , pattern NV_CLIP_SPACE_W_SCALING_EXTENSION_NAME
                                                              ) where

import Foreign.Marshal.Alloc (allocaBytesAligned)
import Foreign.Marshal.Utils (maybePeek)
import Foreign.Ptr (nullPtr)
import Foreign.Ptr (plusPtr)
import Control.Monad.Trans.Class (lift)
import Control.Monad.Trans.Cont (evalContT)
import Data.Vector (generateM)
import qualified Data.Vector (imapM_)
import qualified Data.Vector (length)
import Data.Either (Either)
import Data.String (IsString)
import Data.Typeable (Typeable)
import Foreign.C.Types (CFloat)
import Foreign.C.Types (CFloat(CFloat))
import Foreign.Storable (Storable)
import Foreign.Storable (Storable(peek))
import Foreign.Storable (Storable(poke))
import qualified Foreign.Storable (Storable(..))
import Foreign.Ptr (FunPtr)
import Foreign.Ptr (Ptr)
import Data.Word (Word32)
import Data.Kind (Type)
import Control.Monad.Trans.Cont (ContT(..))
import Data.Vector (Vector)
import Graphics.Vulkan.CStruct.Utils (advancePtrBytes)
import Graphics.Vulkan.Core10.BaseType (bool32ToBool)
import Graphics.Vulkan.Core10.BaseType (boolToBool32)
import Graphics.Vulkan.NamedType ((:::))
import Graphics.Vulkan.Core10.BaseType (Bool32)
import Graphics.Vulkan.Core10.Handles (CommandBuffer)
import Graphics.Vulkan.Core10.Handles (CommandBuffer(..))
import Graphics.Vulkan.Core10.Handles (CommandBuffer_T)
import Graphics.Vulkan.Dynamic (DeviceCmds(pVkCmdSetViewportWScalingNV))
import Graphics.Vulkan.CStruct (FromCStruct)
import Graphics.Vulkan.CStruct (FromCStruct(..))
import Graphics.Vulkan.Core10.Enums.StructureType (StructureType)
import Graphics.Vulkan.CStruct (ToCStruct)
import Graphics.Vulkan.CStruct (ToCStruct(..))
import Graphics.Vulkan.Zero (Zero(..))
import Graphics.Vulkan.Core10.Enums.StructureType (StructureType(STRUCTURE_TYPE_PIPELINE_VIEWPORT_W_SCALING_STATE_CREATE_INFO_NV))
foreign import ccall
#if !defined(SAFE_FOREIGN_CALLS)
  unsafe
#endif
  "dynamic" mkVkCmdSetViewportWScalingNV
  :: FunPtr (Ptr CommandBuffer_T -> Word32 -> Word32 -> Ptr ViewportWScalingNV -> IO ()) -> Ptr CommandBuffer_T -> Word32 -> Word32 -> Ptr ViewportWScalingNV -> IO ()

-- | vkCmdSetViewportWScalingNV - Set the viewport W scaling on a command
-- buffer
--
-- = Parameters
--
-- -   'Graphics.Vulkan.Core10.Handles.CommandBuffer' is the command buffer
--     into which the command will be recorded.
--
-- -   @firstViewport@ is the index of the first viewport whose parameters
--     are updated by the command.
--
-- -   @viewportCount@ is the number of viewports whose parameters are
--     updated by the command.
--
-- -   @pViewportWScalings@ is a pointer to an array of
--     'ViewportWScalingNV' structures specifying viewport parameters.
--
-- = Description
--
-- The viewport parameters taken from element i of @pViewportWScalings@
-- replace the current state for the viewport index @firstViewport@ + i,
-- for i in [0, @viewportCount@).
--
-- == Valid Usage
--
-- -   @firstViewport@ /must/ be less than
--     'Graphics.Vulkan.Core10.DeviceInitialization.PhysicalDeviceLimits'::@maxViewports@
--
-- -   The sum of @firstViewport@ and @viewportCount@ /must/ be between @1@
--     and
--     'Graphics.Vulkan.Core10.DeviceInitialization.PhysicalDeviceLimits'::@maxViewports@,
--     inclusive
--
-- == Valid Usage (Implicit)
--
-- -   'Graphics.Vulkan.Core10.Handles.CommandBuffer' /must/ be a valid
--     'Graphics.Vulkan.Core10.Handles.CommandBuffer' handle
--
-- -   @pViewportWScalings@ /must/ be a valid pointer to an array of
--     @viewportCount@ 'ViewportWScalingNV' structures
--
-- -   'Graphics.Vulkan.Core10.Handles.CommandBuffer' /must/ be in the
--     <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#commandbuffers-lifecycle recording state>
--
-- -   The 'Graphics.Vulkan.Core10.Handles.CommandPool' that
--     'Graphics.Vulkan.Core10.Handles.CommandBuffer' was allocated from
--     /must/ support graphics operations
--
-- -   @viewportCount@ /must/ be greater than @0@
--
-- == Host Synchronization
--
-- -   Host access to 'Graphics.Vulkan.Core10.Handles.CommandBuffer' /must/
--     be externally synchronized
--
-- -   Host access to the 'Graphics.Vulkan.Core10.Handles.CommandPool' that
--     'Graphics.Vulkan.Core10.Handles.CommandBuffer' was allocated from
--     /must/ be externally synchronized
--
-- == Command Properties
--
-- \'
--
-- +----------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
-- | <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VkCommandBufferLevel Command Buffer Levels> | <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#vkCmdBeginRenderPass Render Pass Scope> | <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VkQueueFlagBits Supported Queue Types> | <https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#synchronization-pipeline-stages-types Pipeline Type> |
-- +============================================================================================================================+========================================================================================================================+=======================================================================================================================+=====================================================================================================================================+
-- | Primary                                                                                                                    | Both                                                                                                                   | Graphics                                                                                                              |                                                                                                                                     |
-- | Secondary                                                                                                                  |                                                                                                                        |                                                                                                                       |                                                                                                                                     |
-- +----------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------+
--
-- = See Also
--
-- 'Graphics.Vulkan.Core10.Handles.CommandBuffer', 'ViewportWScalingNV'
cmdSetViewportWScalingNV :: CommandBuffer -> ("firstViewport" ::: Word32) -> ("viewportWScalings" ::: Vector ViewportWScalingNV) -> IO ()
cmdSetViewportWScalingNV commandBuffer firstViewport viewportWScalings = evalContT $ do
  let vkCmdSetViewportWScalingNV' = mkVkCmdSetViewportWScalingNV (pVkCmdSetViewportWScalingNV (deviceCmds (commandBuffer :: CommandBuffer)))
  pPViewportWScalings <- ContT $ allocaBytesAligned @ViewportWScalingNV ((Data.Vector.length (viewportWScalings)) * 8) 4
  Data.Vector.imapM_ (\i e -> ContT $ pokeCStruct (pPViewportWScalings `plusPtr` (8 * (i)) :: Ptr ViewportWScalingNV) (e) . ($ ())) (viewportWScalings)
  lift $ vkCmdSetViewportWScalingNV' (commandBufferHandle (commandBuffer)) (firstViewport) ((fromIntegral (Data.Vector.length $ (viewportWScalings)) :: Word32)) (pPViewportWScalings)
  pure $ ()


-- | VkViewportWScalingNV - Structure specifying a viewport
--
-- = See Also
--
-- 'PipelineViewportWScalingStateCreateInfoNV', 'cmdSetViewportWScalingNV'
data ViewportWScalingNV = ViewportWScalingNV
  { -- | @xcoeff@ and @ycoeff@ are the viewport’s W scaling factor for x and y
    -- respectively.
    xcoeff :: Float
  , -- No documentation found for Nested "VkViewportWScalingNV" "ycoeff"
    ycoeff :: Float
  }
  deriving (Typeable)
deriving instance Show ViewportWScalingNV

instance ToCStruct ViewportWScalingNV where
  withCStruct x f = allocaBytesAligned 8 4 $ \p -> pokeCStruct p x (f p)
  pokeCStruct p ViewportWScalingNV{..} f = do
    poke ((p `plusPtr` 0 :: Ptr CFloat)) (CFloat (xcoeff))
    poke ((p `plusPtr` 4 :: Ptr CFloat)) (CFloat (ycoeff))
    f
  cStructSize = 8
  cStructAlignment = 4
  pokeZeroCStruct p f = do
    poke ((p `plusPtr` 0 :: Ptr CFloat)) (CFloat (zero))
    poke ((p `plusPtr` 4 :: Ptr CFloat)) (CFloat (zero))
    f

instance FromCStruct ViewportWScalingNV where
  peekCStruct p = do
    xcoeff <- peek @CFloat ((p `plusPtr` 0 :: Ptr CFloat))
    ycoeff <- peek @CFloat ((p `plusPtr` 4 :: Ptr CFloat))
    pure $ ViewportWScalingNV
             ((\(CFloat a) -> a) xcoeff) ((\(CFloat a) -> a) ycoeff)

instance Storable ViewportWScalingNV where
  sizeOf ~_ = 8
  alignment ~_ = 4
  peek = peekCStruct
  poke ptr poked = pokeCStruct ptr poked (pure ())

instance Zero ViewportWScalingNV where
  zero = ViewportWScalingNV
           zero
           zero


-- | VkPipelineViewportWScalingStateCreateInfoNV - Structure specifying
-- parameters of a newly created pipeline viewport W scaling state
--
-- == Valid Usage (Implicit)
--
-- = See Also
--
-- 'Graphics.Vulkan.Core10.BaseType.Bool32',
-- 'Graphics.Vulkan.Core10.Enums.StructureType.StructureType',
-- 'ViewportWScalingNV'
data PipelineViewportWScalingStateCreateInfoNV = PipelineViewportWScalingStateCreateInfoNV
  { -- | @viewportWScalingEnable@ controls whether viewport __W__ scaling is
    -- enabled.
    viewportWScalingEnable :: Bool
  , -- | @pViewportWScalings@ is a pointer to an array of 'ViewportWScalingNV'
    -- structures defining the __W__ scaling parameters for the corresponding
    -- viewports. If the viewport __W__ scaling state is dynamic, this member
    -- is ignored.
    viewportWScalings :: Either Word32 (Vector ViewportWScalingNV)
  }
  deriving (Typeable)
deriving instance Show PipelineViewportWScalingStateCreateInfoNV

instance ToCStruct PipelineViewportWScalingStateCreateInfoNV where
  withCStruct x f = allocaBytesAligned 32 8 $ \p -> pokeCStruct p x (f p)
  pokeCStruct p PipelineViewportWScalingStateCreateInfoNV{..} f = evalContT $ do
    lift $ poke ((p `plusPtr` 0 :: Ptr StructureType)) (STRUCTURE_TYPE_PIPELINE_VIEWPORT_W_SCALING_STATE_CREATE_INFO_NV)
    lift $ poke ((p `plusPtr` 8 :: Ptr (Ptr ()))) (nullPtr)
    lift $ poke ((p `plusPtr` 16 :: Ptr Bool32)) (boolToBool32 (viewportWScalingEnable))
    lift $ poke ((p `plusPtr` 20 :: Ptr Word32)) ((fromIntegral (either id (fromIntegral . Data.Vector.length) (viewportWScalings)) :: Word32))
    pViewportWScalings'' <- case (viewportWScalings) of
      Left _ -> pure nullPtr
      Right v -> do
        pPViewportWScalings' <- ContT $ allocaBytesAligned @ViewportWScalingNV ((Data.Vector.length (v)) * 8) 4
        Data.Vector.imapM_ (\i e -> ContT $ pokeCStruct (pPViewportWScalings' `plusPtr` (8 * (i)) :: Ptr ViewportWScalingNV) (e) . ($ ())) (v)
        pure $ pPViewportWScalings'
    lift $ poke ((p `plusPtr` 24 :: Ptr (Ptr ViewportWScalingNV))) pViewportWScalings''
    lift $ f
  cStructSize = 32
  cStructAlignment = 8
  pokeZeroCStruct p f = do
    poke ((p `plusPtr` 0 :: Ptr StructureType)) (STRUCTURE_TYPE_PIPELINE_VIEWPORT_W_SCALING_STATE_CREATE_INFO_NV)
    poke ((p `plusPtr` 8 :: Ptr (Ptr ()))) (nullPtr)
    poke ((p `plusPtr` 16 :: Ptr Bool32)) (boolToBool32 (zero))
    f

instance FromCStruct PipelineViewportWScalingStateCreateInfoNV where
  peekCStruct p = do
    viewportWScalingEnable <- peek @Bool32 ((p `plusPtr` 16 :: Ptr Bool32))
    viewportCount <- peek @Word32 ((p `plusPtr` 20 :: Ptr Word32))
    pViewportWScalings <- peek @(Ptr ViewportWScalingNV) ((p `plusPtr` 24 :: Ptr (Ptr ViewportWScalingNV)))
    pViewportWScalings' <- maybePeek (\j -> generateM (fromIntegral viewportCount) (\i -> peekCStruct @ViewportWScalingNV (((j) `advancePtrBytes` (8 * (i)) :: Ptr ViewportWScalingNV)))) pViewportWScalings
    let pViewportWScalings'' = maybe (Left viewportCount) Right pViewportWScalings'
    pure $ PipelineViewportWScalingStateCreateInfoNV
             (bool32ToBool viewportWScalingEnable) pViewportWScalings''

instance Zero PipelineViewportWScalingStateCreateInfoNV where
  zero = PipelineViewportWScalingStateCreateInfoNV
           zero
           (Left 0)


type NV_CLIP_SPACE_W_SCALING_SPEC_VERSION = 1

-- No documentation found for TopLevel "VK_NV_CLIP_SPACE_W_SCALING_SPEC_VERSION"
pattern NV_CLIP_SPACE_W_SCALING_SPEC_VERSION :: forall a . Integral a => a
pattern NV_CLIP_SPACE_W_SCALING_SPEC_VERSION = 1


type NV_CLIP_SPACE_W_SCALING_EXTENSION_NAME = "VK_NV_clip_space_w_scaling"

-- No documentation found for TopLevel "VK_NV_CLIP_SPACE_W_SCALING_EXTENSION_NAME"
pattern NV_CLIP_SPACE_W_SCALING_EXTENSION_NAME :: forall a . (Eq a, IsString a) => a
pattern NV_CLIP_SPACE_W_SCALING_EXTENSION_NAME = "VK_NV_clip_space_w_scaling"