56 lines
2 KiB
Rust
56 lines
2 KiB
Rust
use crate::SwBufError;
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use raw_window_handle::AppKitWindowHandle;
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use core_graphics::base::{kCGBitmapByteOrder32Little, kCGImageAlphaNoneSkipFirst, kCGRenderingIntentDefault};
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use core_graphics::color_space::CGColorSpace;
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use core_graphics::data_provider::CGDataProvider;
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use core_graphics::image::CGImage;
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use cocoa::base::{id, nil};
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use cocoa::appkit::{NSView, NSViewWidthSizable, NSViewHeightSizable, NSWindow};
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use cocoa::quartzcore::{CALayer, ContentsGravity};
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use foreign_types::ForeignType;
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use std::sync::Arc;
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pub struct CGImpl {
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layer: CALayer,
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}
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impl CGImpl {
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pub unsafe fn new(handle: AppKitWindowHandle) -> Result<Self, SwBufError> {
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let window = handle.ns_window as id;
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let view = handle.ns_view as id;
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let layer = CALayer::new();
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let subview: id = NSView::alloc(nil).initWithFrame_(NSView::frame(view));
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layer.set_contents_gravity(ContentsGravity::TopLeft);
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layer.set_needs_display_on_bounds_change(false);
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layer.set_contents_scale(window.backingScaleFactor());
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subview.setLayer(layer.id());
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subview.setAutoresizingMask_(NSViewWidthSizable | NSViewHeightSizable);
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view.addSubview_(subview); // retains subview (+1) = 2
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let _: () = msg_send![subview, release]; // releases subview (-1) = 1
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Ok(Self{layer})
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}
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pub(crate) unsafe fn set_buffer(&mut self, buffer: &[u32], width: u16, height: u16) {
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let color_space = CGColorSpace::create_device_rgb();
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let data = std::slice::from_raw_parts(
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buffer.as_ptr() as *const u8,
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buffer.len() * 4).to_vec();
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let data_provider = CGDataProvider::from_buffer(Arc::new(data));
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let image = CGImage::new(
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width as usize,
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height as usize,
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8,
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32,
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(width * 4) as usize,
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&color_space,
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kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst,
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&data_provider,
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false,
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kCGRenderingIntentDefault,
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);
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self.layer.set_contents(image.as_ptr() as id);
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}
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}
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