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Use
raw-window-metal to do layer creation in skia
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,18 +1,29 @@ | ||
| // Copyright © SixtyFPS GmbH <[email protected]> | ||
| // SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0 | ||
|
|
||
| use cocoa::{appkit::NSView, base::id as cocoa_id}; | ||
| use core_graphics_types::geometry::CGSize; | ||
| use foreign_types::ForeignTypeRef; | ||
| use foreign_types::{ForeignType, ForeignTypeRef}; | ||
| use i_slint_core::api::PhysicalSize as PhysicalWindowSize; | ||
| use metal::MTLPixelFormat; | ||
| use objc::{rc::autoreleasepool, runtime::YES}; | ||
| use objc::{msg_send, sel, sel_impl}; | ||
| use objc::{ | ||
| rc::autoreleasepool, | ||
| runtime::{Object, BOOL, NO}, | ||
| }; | ||
|
|
||
| use skia_safe::gpu::mtl; | ||
|
|
||
| use std::cell::RefCell; | ||
| use std::rc::Rc; | ||
|
|
||
| #[link(name = "QuartzCore", kind = "framework")] | ||
| extern "C" { | ||
| #[allow(non_upper_case_globals)] | ||
| static kCAGravityTopLeft: *mut Object; | ||
| #[allow(non_upper_case_globals)] | ||
| static kCAGravityBottomLeft: *mut Object; | ||
| } | ||
|
|
||
| /// This surface renders into the given window using Metal. The provided display argument | ||
| /// is ignored, as it has no meaning on macOS. | ||
| pub struct MetalSurface { | ||
|
|
@@ -27,36 +38,40 @@ impl super::Surface for MetalSurface { | |
| _display_handle: Rc<dyn raw_window_handle::HasDisplayHandle>, | ||
| size: PhysicalWindowSize, | ||
| ) -> Result<Self, i_slint_core::platform::PlatformError> { | ||
| let layer = match window_handle | ||
| .window_handle() | ||
| .map_err(|e| format!("Error obtaining window handle for skia metal renderer: {e}"))? | ||
| .as_raw() | ||
| { | ||
| raw_window_handle::RawWindowHandle::AppKit(handle) => unsafe { | ||
| raw_window_metal::Layer::from_ns_view(handle.ns_view) | ||
| }, | ||
| raw_window_handle::RawWindowHandle::UiKit(handle) => unsafe { | ||
| raw_window_metal::Layer::from_ui_view(handle.ui_view) | ||
| }, | ||
| _ => return Err("Skia Renderer: Metal surface is only supported with AppKit".into()), | ||
| }; | ||
|
|
||
| // SAFETY: The layer is an initialized instance of `CAMetalLayer`, and | ||
| // we transfer the retain count to `MetalLayer` using `into_raw`. | ||
| let layer = unsafe { metal::MetalLayer::from_ptr(layer.into_raw().cast().as_ptr()) }; | ||
|
|
||
| let device = metal::Device::system_default() | ||
| .ok_or_else(|| format!("Skia Renderer: No metal device found"))?; | ||
|
|
||
| let layer = metal::MetalLayer::new(); | ||
| layer.set_device(&device); | ||
| layer.set_pixel_format(MTLPixelFormat::BGRA8Unorm); | ||
| layer.set_opaque(false); | ||
| layer.set_presents_with_transaction(false); | ||
|
|
||
| layer.set_drawable_size(CGSize::new(size.width as f64, size.height as f64)); | ||
|
|
||
| unsafe { | ||
| let view = match window_handle | ||
| .window_handle() | ||
| .map_err(|e| format!("Error obtaining window handle for skia metal renderer: {e}"))? | ||
| .as_raw() | ||
| { | ||
| raw_window_handle::RawWindowHandle::AppKit( | ||
| raw_window_handle::AppKitWindowHandle { ns_view, .. }, | ||
| ) => ns_view.as_ptr(), | ||
| _ => { | ||
| return Err("Skia Renderer: Metal surface is only supported with AppKit".into()) | ||
| } | ||
| } as cocoa_id; | ||
| view.setWantsLayer(YES); | ||
| view.setLayer(layer.as_ref() as *const _ as _); | ||
| view.setLayerContentsPlacement( | ||
| cocoa::appkit::NSViewLayerContentsPlacement::NSViewLayerContentsPlacementTopLeft, | ||
| ); | ||
| } | ||
| let flipped: BOOL = unsafe { msg_send![layer.as_ptr(), isFlipped] }; | ||
| let gravity = if flipped != NO { | ||
| unsafe { kCAGravityTopLeft } | ||
| } else { | ||
| unsafe { kCAGravityBottomLeft } | ||
| }; | ||
| let _: () = unsafe { msg_send![layer.as_ptr(), setContentsGravity: gravity] }; | ||
|
|
||
| let command_queue = device.new_command_queue(); | ||
|
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|
@@ -85,10 +100,6 @@ impl super::Surface for MetalSurface { | |
| Ok(()) | ||
| } | ||
|
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||
| fn set_scale_factor(&self, scale_factor: f32) { | ||
| self.layer.set_contents_scale(scale_factor.into()); | ||
| } | ||
|
|
||
| fn render( | ||
| &self, | ||
| _size: PhysicalWindowSize, | ||
|
|
||
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