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use crate::bindings::Windows::Win32::Graphics::{Direct3D11::*, Direct3D12::*, Dxgi::*}; use crate::*; use windows::{Abi, IUnknown, Interface}; #[derive(Clone, PartialEq, Eq)] pub struct RenderTarget { wrapper: ID3D11Resource, bitmap: ID2D1Bitmap1, } impl Target for RenderTarget { fn bitmap(&self) -> &ID2D1Bitmap1 { &self.bitmap } fn size(&self) -> Size { unsafe { let size = self.bitmap.GetSize(); Size::new(size.width, size.height) } } fn physical_size(&self) -> gecl::Size<u32> { unsafe { let size = self.bitmap.GetPixelSize(); gecl::Size::new(size.width, size.height) } } } pub struct Direct3D12 { d3d11on12_device: ID3D11On12Device, d2d1_factory: ID2D1Factory1, d2d1_device_context: ID2D1DeviceContext, d3d11_device_context: ID3D11DeviceContext, } impl Direct3D12 { pub fn new( d3d12_device: &impl windows::Interface, command_queue: &impl windows::Interface, ) -> windows::Result<Self> { unsafe { let d3d12_device = d3d12_device .cast::<ID3D12Device>() .expect("cannot cast to ID3D12Device"); let command_queue = command_queue .cast::<ID3D12CommandQueue>() .expect("cannot cast to ID3D12CommandQueue"); let (d3d11on12_device, d3d11_device_context) = { let mut queues = [command_queue.cast::<IUnknown>().unwrap()]; let mut p = None; let mut dc = None; D3D11On12CreateDevice( &d3d12_device, D3D11_CREATE_DEVICE_BGRA_SUPPORT.0, std::ptr::null(), 0, queues.as_mut_ptr() as _, queues.len() as _, 0, &mut p, &mut dc, std::ptr::null_mut(), ) .map(|_| (p.unwrap().cast::<ID3D11On12Device>().unwrap(), dc.unwrap()))? }; let d2d1_factory = { let mut p: Option<ID2D1Factory1> = None; D2D1CreateFactory( D2D1_FACTORY_TYPE_SINGLE_THREADED, &ID2D1Factory1::IID, std::ptr::null(), p.set_abi(), ) .map(|_| p.unwrap())? }; let dxgi_device = d3d11on12_device.cast::<IDXGIDevice>()?; let d2d1_device = { d2d1_factory.CreateDevice(&dxgi_device)? }; let d2d1_device_context = { d2d1_device.CreateDeviceContext(D2D1_DEVICE_CONTEXT_OPTIONS_NONE)? }; Ok(Self { d3d11on12_device, d2d1_factory, d2d1_device_context, d3d11_device_context, }) } } #[inline] pub fn flush(&self) { unsafe { self.d3d11_device_context.Flush(); } } } impl Backend for Direct3D12 { type RenderTarget = RenderTarget; #[inline] fn device_context(&self) -> &ID2D1DeviceContext { &self.d2d1_device_context } #[inline] fn d2d1_factory(&self) -> &ID2D1Factory1 { &self.d2d1_factory } fn back_buffers( &self, swap_chain: &IDXGISwapChain1, ) -> windows::Result<Vec<Self::RenderTarget>> { unsafe { let desc = swap_chain.GetDesc1()?; let bmp_props = D2D1_BITMAP_PROPERTIES1 { pixelFormat: D2D1_PIXEL_FORMAT { format: desc.Format, alphaMode: D2D1_ALPHA_MODE_PREMULTIPLIED, }, bitmapOptions: D2D1_BITMAP_OPTIONS_TARGET | D2D1_BITMAP_OPTIONS_CANNOT_DRAW, ..Default::default() }; let mut targets = vec![]; for i in 0..desc.BufferCount { let buffer: ID3D12Resource = swap_chain.GetBuffer(i)?; let flags = D3D11_RESOURCE_FLAGS { BindFlags: D3D11_BIND_RENDER_TARGET.0 as _, ..Default::default() }; let wrapper: ID3D11Resource = self.d3d11on12_device.CreateWrappedResource( &buffer, &flags, D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_PRESENT, )?; let surface = wrapper.cast::<IDXGISurface>()?; let bitmap = { self.d2d1_device_context .CreateBitmapFromDxgiSurface(&surface, &bmp_props)? }; targets.push(RenderTarget { wrapper, bitmap }); } Ok(targets) } } fn render_target( &self, target: &impl windows::Interface, ) -> windows::Result<Self::RenderTarget> { unsafe { let resource: ID3D12Resource = target.cast().expect("cannot cast to ID3D12Resource"); let desc = resource.GetDesc(); if cfg!(debug_assertions) { assert!((desc.Flags.0 & D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET.0) != 0); } let wrapper: ID3D11Resource = { self.d3d11on12_device.CreateWrappedResource( &resource, &D3D11_RESOURCE_FLAGS { BindFlags: D3D11_BIND_RENDER_TARGET.0 as _, ..Default::default() }, D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_COMMON, )? }; let surface: IDXGISurface = wrapper.cast()?; let bitmap = { self.d2d1_device_context.CreateBitmapFromDxgiSurface( &surface, &D2D1_BITMAP_PROPERTIES1 { pixelFormat: D2D1_PIXEL_FORMAT { format: desc.Format, alphaMode: D2D1_ALPHA_MODE_PREMULTIPLIED, }, bitmapOptions: D2D1_BITMAP_OPTIONS_TARGET | D2D1_BITMAP_OPTIONS_CANNOT_DRAW, ..Default::default() }, )? }; Ok(RenderTarget { wrapper, bitmap }) } } #[inline] fn begin_draw(&self, target: &Self::RenderTarget) { unsafe { let mut wrappers = [target.wrapper.clone()]; self.d3d11on12_device .AcquireWrappedResources(wrappers.as_mut_ptr() as _, wrappers.len() as _); } } #[inline] fn end_draw(&self, target: &Self::RenderTarget) { unsafe { let mut wrappers = [target.wrapper.clone()]; self.d3d11on12_device .ReleaseWrappedResources(wrappers.as_mut_ptr() as _, wrappers.len() as _); self.d3d11_device_context.Flush(); self.d3d11_device_context.ClearState(); } } }