Drezil/dear-imgui.hs
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Recover init and shutdown from withVulkan (#40)

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This commit is contained in:
Alexander Bondarenko
2021-03-11 12:00:30 +03:00
committed by GitHub
parent 007b3cccb8
commit 2eddbdfa04
1 changed files with 42 additions and 34 deletions
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76
src/DearImGui/Vulkan.hs
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@@ -12,6 +12,8 @@ Vulkan backend for Dear ImGui.
module DearImGui.Vulkan
( InitInfo(..)
, withVulkan
, vulkanInit
, vulkanShutdown
, vulkanNewFrame
, vulkanRenderDrawData
, vulkanCreateFontsTexture
@@ -28,7 +30,7 @@ import Data.Word
import Foreign.Marshal.Alloc
( alloca )
import Foreign.Ptr
( Ptr, freeHaskellFunPtr, nullPtr )
( FunPtr, Ptr, freeHaskellFunPtr, nullPtr )
import Foreign.Storable
( Storable(poke) )
@@ -83,7 +85,15 @@ data InitInfo =
-- | Wraps @ImGui_ImplVulkan_Init@ and @ImGui_ImplVulkan_Shutdown@.
withVulkan :: MonadUnliftIO m => InitInfo -> Vulkan.RenderPass -> ( Bool -> m a ) -> m a
withVulkan ( InitInfo {..} ) renderPass action = do
withVulkan initInfo renderPass action =
bracket
( vulkanInit initInfo renderPass )
vulkanShutdown
( \ ( _, initResult ) -> action initResult )
-- | Wraps @ImGui_ImplVulkan_Init@
vulkanInit :: MonadUnliftIO m => InitInfo -> Vulkan.RenderPass -> m (FunPtr (Vulkan.Result -> IO ()), Bool)
vulkanInit ( InitInfo {..} ) renderPass = do
let
instancePtr :: Ptr Vulkan.Instance_T
instancePtr = Vulkan.instanceHandle instance'
@@ -97,38 +107,36 @@ withVulkan ( InitInfo {..} ) renderPass action = do
withCallbacks f = case mbAllocator of
Nothing -> f nullPtr
Just callbacks -> alloca ( \ ptr -> poke ptr callbacks *> f ptr )
bracket
( liftIO do
checkResultFunPtr <- $( C.mkFunPtr [t| Vulkan.Result -> IO () |] ) checkResult
initResult <- withCallbacks \ callbacksPtr ->
[C.block| bool {
ImGui_ImplVulkan_InitInfo initInfo;
VkInstance instance = { $( VkInstance_T* instancePtr ) };
initInfo.Instance = instance;
VkPhysicalDevice physicalDevice = { $( VkPhysicalDevice_T* physicalDevicePtr ) };
initInfo.PhysicalDevice = physicalDevice;
VkDevice device = { $( VkDevice_T* devicePtr ) };
initInfo.Device = device;
initInfo.QueueFamily = $(uint32_t queueFamily);
VkQueue queue = { $( VkQueue_T* queuePtr ) };
initInfo.Queue = queue;
initInfo.PipelineCache = $(VkPipelineCache pipelineCache);
initInfo.DescriptorPool = $(VkDescriptorPool descriptorPool);
initInfo.Subpass = $(uint32_t subpass);
initInfo.MinImageCount = $(uint32_t minImageCount);
initInfo.ImageCount = $(uint32_t imageCount);
initInfo.MSAASamples = $(VkSampleCountFlagBits msaaSamples);
initInfo.Allocator = $(VkAllocationCallbacks* callbacksPtr);
initInfo.CheckVkResultFn = $( void (*checkResultFunPtr)(VkResult) );
return ImGui_ImplVulkan_Init(&initInfo, $(VkRenderPass renderPass) );
}|]
pure ( checkResultFunPtr, initResult /= 0 )
)
( \ ( checkResultFunPtr, _ ) -> liftIO do
[C.exp| void { ImGui_ImplVulkan_Shutdown(); } |]
freeHaskellFunPtr checkResultFunPtr
)
( \ ( _, initResult ) -> action initResult )
liftIO do
checkResultFunPtr <- $( C.mkFunPtr [t| Vulkan.Result -> IO () |] ) checkResult
initResult <- withCallbacks \ callbacksPtr ->
[C.block| bool {
ImGui_ImplVulkan_InitInfo initInfo;
VkInstance instance = { $( VkInstance_T* instancePtr ) };
initInfo.Instance = instance;
VkPhysicalDevice physicalDevice = { $( VkPhysicalDevice_T* physicalDevicePtr ) };
initInfo.PhysicalDevice = physicalDevice;
VkDevice device = { $( VkDevice_T* devicePtr ) };
initInfo.Device = device;
initInfo.QueueFamily = $(uint32_t queueFamily);
VkQueue queue = { $( VkQueue_T* queuePtr ) };
initInfo.Queue = queue;
initInfo.PipelineCache = $(VkPipelineCache pipelineCache);
initInfo.DescriptorPool = $(VkDescriptorPool descriptorPool);
initInfo.Subpass = $(uint32_t subpass);
initInfo.MinImageCount = $(uint32_t minImageCount);
initInfo.ImageCount = $(uint32_t imageCount);
initInfo.MSAASamples = $(VkSampleCountFlagBits msaaSamples);
initInfo.Allocator = $(VkAllocationCallbacks* callbacksPtr);
initInfo.CheckVkResultFn = $( void (*checkResultFunPtr)(VkResult) );
return ImGui_ImplVulkan_Init(&initInfo, $(VkRenderPass renderPass) );
}|]
pure ( checkResultFunPtr, initResult /= 0 )
vulkanShutdown :: MonadIO m => (FunPtr a, b) -> m ()
vulkanShutdown ( checkResultFunPtr, _ ) = liftIO do
[C.exp| void { ImGui_ImplVulkan_Shutdown(); } |]
freeHaskellFunPtr checkResultFunPtr
-- | Wraps @ImGui_ImplVulkan_NewFrame@.
vulkanNewFrame :: MonadIO m => m ()