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use winapi::shared::{dxgi1_5, minwindef};
use super::SurfaceTarget;
use crate::auxil::{self, dxgi::result::HResult as _};
use std::{mem, sync::Arc};
impl Drop for super::Instance {
fn drop(&mut self) {
unsafe { self.factory.destroy() };
crate::auxil::dxgi::exception::unregister_exception_handler();
}
}
impl crate::Instance<super::Api> for super::Instance {
unsafe fn init(desc: &crate::InstanceDescriptor) -> Result<Self, crate::InstanceError> {
let lib_main = native::D3D12Lib::new().map_err(|_| crate::InstanceError)?;
if desc.flags.contains(crate::InstanceFlags::VALIDATION) {
// Enable debug layer
match lib_main.get_debug_interface() {
Ok(pair) => match pair.into_result() {
Ok(debug_controller) => {
debug_controller.enable_layer();
unsafe { debug_controller.Release() };
}
Err(err) => {
log::warn!("Unable to enable D3D12 debug interface: {}", err);
}
},
Err(err) => {
log::warn!("Debug interface function for D3D12 not found: {:?}", err);
}
}
}
// Create DXGIFactory4
let (lib_dxgi, factory) = auxil::dxgi::factory::create_factory(
auxil::dxgi::factory::DxgiFactoryType::Factory4,
desc.flags,
)?;
let mut supports_allow_tearing = false;
#[allow(trivial_casts)]
if let Some(factory5) = factory.as_factory5() {
let mut allow_tearing: minwindef::BOOL = minwindef::FALSE;
let hr = unsafe {
factory5.CheckFeatureSupport(
dxgi1_5::DXGI_FEATURE_PRESENT_ALLOW_TEARING,
&mut allow_tearing as *mut _ as *mut _,
mem::size_of::<minwindef::BOOL>() as _,
)
};
match hr.into_result() {
Err(err) => log::warn!("Unable to check for tearing support: {}", err),
Ok(()) => supports_allow_tearing = true,
}
}
Ok(Self {
// The call to create_factory will only succeed if we get a factory4, so this is safe.
factory,
library: Arc::new(lib_main),
_lib_dxgi: lib_dxgi,
supports_allow_tearing,
flags: desc.flags,
})
}
unsafe fn create_surface(
&self,
_display_handle: raw_window_handle::RawDisplayHandle,
window_handle: raw_window_handle::RawWindowHandle,
) -> Result<super::Surface, crate::InstanceError> {
match window_handle {
raw_window_handle::RawWindowHandle::Win32(handle) => Ok(super::Surface {
factory: self.factory,
target: SurfaceTarget::WndHandle(handle.hwnd as *mut _),
supports_allow_tearing: self.supports_allow_tearing,
swap_chain: None,
}),
_ => Err(crate::InstanceError),
}
}
unsafe fn destroy_surface(&self, _surface: super::Surface) {
// just drop
}
unsafe fn enumerate_adapters(&self) -> Vec<crate::ExposedAdapter<super::Api>> {
let adapters = auxil::dxgi::factory::enumerate_adapters(self.factory);
adapters
.into_iter()
.filter_map(|raw| super::Adapter::expose(raw, &self.library, self.flags))
.collect()
}
}
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