StratoSDK is a framework with a declarative approach similar to Flutter/React, written and designed entirely for Rust.
| 1 | mod renderer; |
| 2 | mod renderer_manager; |
| 3 | |
| 4 | use crate::rendering::wgpu::Resources; |
| 5 | use crate::{platform::mac::rendering::Device, rendering::GPUPowerPreference}; |
| 6 | use anyhow::{anyhow, Result}; |
| 7 | pub use renderer_manager::RendererManager; |
| 8 | |
| 9 | use crate::rendering::OnGPUDeviceSelected; |
| 10 | use cocoa::{appkit::NSView, base::id}; |
| 11 | use pathfinder_geometry::vector::vec2f; |
| 12 | use std::ptr::NonNull; |
| 13 | use wgpu::rwh::{ |
| 14 | AppKitDisplayHandle, AppKitWindowHandle, DisplayHandle, HandleError, HasDisplayHandle, |
| 15 | HasWindowHandle, RawDisplayHandle, RawWindowHandle, WindowHandle, |
| 16 | }; |
| 17 | |
| 18 | impl Device { |
| 19 | /// Constructs a new [`Device`] to render using WGPU. |
| 20 | pub fn new_wgpu( |
| 21 | native_view: id, |
| 22 | gpu_power_preference: GPUPowerPreference, |
| 23 | on_gpu_device_info: Box<OnGPUDeviceSelected>, |
| 24 | ) -> Result<Device> { |
| 25 | let view_frame = unsafe { NSView::frame(native_view) }; |
| 26 | let surface_size = vec2f(view_frame.size.width as f32, view_frame.size.height as f32); |
| 27 | |
| 28 | let appkit_window_handle = AppKitWindowHandle::new( |
| 29 | NonNull::new(native_view) |
| 30 | .ok_or_else(|| anyhow!("Received null NSView pointer"))? |
| 31 | .cast(), |
| 32 | ); |
| 33 | let window_handle = |
| 34 | unsafe { WindowHandle::borrow_raw(RawWindowHandle::AppKit(appkit_window_handle)) }; |
| 35 | let display_handle = unsafe { |
| 36 | DisplayHandle::borrow_raw(RawDisplayHandle::AppKit(AppKitDisplayHandle::new())) |
| 37 | }; |
| 38 | |
| 39 | let trusted_window = TrustedWindow { |
| 40 | window_handle, |
| 41 | display_handle, |
| 42 | }; |
| 43 | |
| 44 | crate::rendering::wgpu::init_wgpu_instance(Box::new(trusted_window)); |
| 45 | |
| 46 | let resources = Resources::new( |
| 47 | trusted_window, |
| 48 | gpu_power_preference, |
| 49 | None, |
| 50 | &on_gpu_device_info, |
| 51 | surface_size, |
| 52 | false, /* downrank_non_nvidia_vulkan_adapters */ |
| 53 | )?; |
| 54 | Ok(Device::WGPU(Box::new(resources))) |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | /// Wrapper struct that implements the [`HasRawWindowHandle`] and [`HasRawDisplayHandle`] traits. |
| 59 | /// The raw-window-handle crate purposefully does not provide a blanket implementation of this trait |
| 60 | /// for any implementation of [`RawWindowHandle`] or [`RawDisplayHandle`] because it's not |
| 61 | /// guaranteed that the underlying window won't become invalid while the `WindowHandle` is alive. |
| 62 | /// In the case of Warp this _should_ be safe because we ultimately deallocate the native window |
| 63 | /// when [`crate::platform::mac::Window`] is deallocated (once a `Window` is deallocated, there |
| 64 | /// are no pointers to the native window anymore, which cause it to be deallocated via the |
| 65 | /// `warp_dealloc_window` callback). |
| 66 | /// See <https://github.com/rust-windowing/raw-window-handle/pull/73> for more information on the |
| 67 | /// safety requirements of implementing the [`HasRawWindowHandle`] trait. |
| 68 | #[derive(Copy, Clone, Debug)] |
| 69 | struct TrustedWindow { |
| 70 | window_handle: WindowHandle<'static>, |
| 71 | display_handle: DisplayHandle<'static>, |
| 72 | } |
| 73 | |
| 74 | // THIS IS INCREDIBLY UNSAFE!!! DO NOT DO THIS!!! |
| 75 | // |
| 76 | // That said, we're not using this codepath in production, and it unblocks us |
| 77 | // moving to wgpu 0.19 (an important migration for the Linux target), so we're |
| 78 | // doing this and covering our eyes for now, with the intention of fixing it or |
| 79 | // removing support for `wpgu` in our macOS backend. |
| 80 | unsafe impl Send for TrustedWindow {} |
| 81 | unsafe impl Sync for TrustedWindow {} |
| 82 | |
| 83 | impl HasWindowHandle for TrustedWindow { |
| 84 | fn window_handle(&self) -> Result<WindowHandle<'_>, HandleError> { |
| 85 | Ok(self.window_handle) |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | impl HasDisplayHandle for TrustedWindow { |
| 90 | fn display_handle(&self) -> Result<DisplayHandle<'_>, HandleError> { |
| 91 | Ok(self.display_handle) |
| 92 | } |
| 93 | } |
| 94 |