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use prelude::*; use std::mem; use std::ptr; use vk; use instance::Instance; use shared_library::dynamic_library::DynamicLibrary; use std::path::Path; use std::error::Error; use std::fmt; use RawPtr; use version::{EntryLoader, FunctionPointers, InstanceLoader, V1_0}; #[cfg(windows)] fn get_path() -> &'static Path { Path::new("vulkan-1.dll") } #[cfg(all(unix, not(target_os = "android")))] fn get_path() -> &'static Path { Path::new("libvulkan.so.1") } #[cfg(target_os = "android")] fn get_path() -> &'static Path { Path::new("libvulkan.so") } lazy_static!{ static ref VK_LIB: Result<DynamicLibrary, String> = DynamicLibrary::open(Some(get_path())); } #[derive(Clone)] pub struct Entry<V: FunctionPointers> { static_fn: vk::StaticFn, entry_fn: V::EntryFp, } #[derive(Debug)] pub enum LoadingError { LibraryLoadError(String), EntryLoadError(Vec<&'static str>), StaticLoadError(Vec<&'static str>), } #[derive(Debug)] pub enum InstanceError { LoadError(Vec<&'static str>), VkError(vk::Result), } impl fmt::Display for InstanceError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "InstanceError::{:?}", self) } } impl Error for InstanceError { fn description(&self) -> &str { "InstanceError" } fn cause(&self) -> Option<&Error> { if let &InstanceError::VkError(ref err) = self { return err.cause(); } None } } #[allow(non_camel_case_types)] pub trait EntryV1_0 { type Fp: FunctionPointers; fn fp_v1_0(&self) -> &vk::EntryFnV1_0; fn static_fn(&self) -> &vk::StaticFn; unsafe fn create_instance( &self, create_info: &vk::InstanceCreateInfo, allocation_callbacks: Option<&vk::AllocationCallbacks>, ) -> Result<Instance<Self::Fp>, InstanceError> { let mut instance: vk::Instance = mem::uninitialized(); let err_code = self.fp_v1_0().create_instance( create_info, allocation_callbacks.as_raw_ptr(), &mut instance, ); if err_code != vk::Result::Success { return Err(InstanceError::VkError(err_code)); } let instance_fp = <<Self as EntryV1_0>::Fp as FunctionPointers>::InstanceFp::load( &self.static_fn(), instance, ).map_err(|err| InstanceError::LoadError(err))?; Ok(Instance::from_raw(instance, instance_fp)) } fn enumerate_instance_layer_properties(&self) -> VkResult<Vec<vk::LayerProperties>> { unsafe { let mut num = 0; self.fp_v1_0() .enumerate_instance_layer_properties(&mut num, ptr::null_mut()); let mut v = Vec::with_capacity(num as usize); let err_code = self.fp_v1_0() .enumerate_instance_layer_properties(&mut num, v.as_mut_ptr()); v.set_len(num as usize); match err_code { vk::Result::Success => Ok(v), _ => Err(err_code), } } } fn enumerate_instance_extension_properties(&self) -> VkResult<Vec<vk::ExtensionProperties>> { unsafe { let mut num = 0; self.fp_v1_0().enumerate_instance_extension_properties( ptr::null(), &mut num, ptr::null_mut(), ); let mut data = Vec::with_capacity(num as usize); let err_code = self.fp_v1_0().enumerate_instance_extension_properties( ptr::null(), &mut num, data.as_mut_ptr(), ); data.set_len(num as usize); match err_code { vk::Result::Success => Ok(data), _ => Err(err_code), } } } fn get_instance_proc_addr( &self, instance: vk::Instance, p_name: *const vk::c_char, ) -> vk::PFN_vkVoidFunction { unsafe { self.static_fn().get_instance_proc_addr(instance, p_name) } } } impl EntryV1_0 for Entry<V1_0> { type Fp = V1_0; fn fp_v1_0(&self) -> &vk::EntryFnV1_0 { self.entry_fn.fp_v1_0() } fn static_fn(&self) -> &vk::StaticFn { &self.static_fn } } impl<V: FunctionPointers> Entry<V> { pub fn new() -> Result<Entry<V>, LoadingError> { let static_fn = match *VK_LIB { Ok(ref lib) => { let static_fn = vk::StaticFn::load(|name| unsafe { let name = name.to_str().unwrap(); let f = match lib.symbol(name) { Ok(s) => s, Err(_) => ptr::null(), }; f }).map_err(|err| LoadingError::StaticLoadError(err))?; Ok(static_fn) } Err(ref err) => Err(LoadingError::LibraryLoadError(err.clone())), }?; let entry_fn = unsafe { V::EntryFp::load(&static_fn).map_err(|err| LoadingError::EntryLoadError(err))? }; Ok(Entry { static_fn: static_fn, entry_fn: entry_fn, }) } }