mirror of
https://github.com/Drezil/dear-imgui.hs.git
synced 2024-11-22 16:57:00 +00:00
74 lines
1.8 KiB
Haskell
74 lines
1.8 KiB
Haskell
{-# LANGUAGE BlockArguments #-}
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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module Util where
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-- base
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import Data.Coerce
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( coerce )
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import Data.Functor.Compose
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( Compose(..) )
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import Data.Functor.Identity
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( Identity(..) )
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import Data.Traversable
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( for )
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#if MIN_VERSION_VulkanMemoryAllocator(0,8,0)
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import Foreign
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( castFunPtr )
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#endif
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-- transformers
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import Control.Monad.Trans.State.Strict
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( StateT(..), State, evalState )
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import Control.Monad.Trans.Writer.Strict
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( runWriter, tell )
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-- vulkan
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import qualified Vulkan
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#if MIN_VERSION_VulkanMemoryAllocator(0,8,0)
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import qualified Vulkan.Dynamic as VkDynamic
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#endif
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import Vulkan.Zero (zero)
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-- VulkanMemoryAllocator
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import qualified VulkanMemoryAllocator as VMA
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---------------------------------------------------------------
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iunzipWith
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:: (Traversable t, Num i, Enum i)
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=> (i -> a -> b) -> (i -> a -> c) -> t a -> ( t b, [c] )
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iunzipWith f g ta
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= runWriter
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$ ifor 0 succ ta \ i a -> do
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tell [g i a]
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pure ( f i a )
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ifor
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:: forall t f i a b
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. ( Applicative f, Traversable t )
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=> i -> ( i -> i ) -> t a -> ( i -> a -> f b ) -> f (t b)
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ifor i0 upd ta f = (`evalState` i0) . getCompose $ result
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where
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result :: Compose (State i) f (t b)
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result = for ta \ a -> ( coerce ( \ i -> ( f i a, upd i ) ) )
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vmaVulkanFunctions
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:: Vulkan.Device
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-> Vulkan.Instance
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-> VMA.VulkanFunctions
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#if MIN_VERSION_VulkanMemoryAllocator(0,8,0)
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vmaVulkanFunctions Vulkan.Device{deviceCmds} Vulkan.Instance{instanceCmds} =
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zero
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{ VMA.vkGetInstanceProcAddr =
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castFunPtr $ VkDynamic.pVkGetInstanceProcAddr instanceCmds
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, VMA.vkGetDeviceProcAddr =
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castFunPtr $ VkDynamic.pVkGetDeviceProcAddr deviceCmds
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}
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#else
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vmaVulkanFunctions _device _instance = zero
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#endif
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