1use crate::{
2 point, size, AtlasTextureId, AtlasTextureKind, AtlasTile, Bounds, ContentMask, DevicePixels,
3 Hsla, MetalAtlas, MonochromeSprite, Path, PathId, PathVertex, PolychromeSprite, PrimitiveBatch,
4 Quad, ScaledPixels, Scene, Shadow, Size, Surface, Underline,
5};
6use cocoa::{
7 base::{NO, YES},
8 foundation::NSUInteger,
9 quartzcore::AutoresizingMask,
10};
11use collections::HashMap;
12use core_foundation::base::TCFType;
13use foreign_types::ForeignType;
14use media::core_video::CVMetalTextureCache;
15use metal::{CommandQueue, MTLPixelFormat, MTLResourceOptions, NSRange};
16use objc::{self, msg_send, sel, sel_impl};
17use smallvec::SmallVec;
18use std::{ffi::c_void, mem, ptr, sync::Arc};
19
20const SHADERS_METALLIB: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/shaders.metallib"));
21const INSTANCE_BUFFER_SIZE: usize = 32 * 1024 * 1024; // This is an arbitrary decision. There's probably a more optimal value (maybe even we could adjust dynamically...)
22
23pub(crate) struct MetalRenderer {
24 layer: metal::MetalLayer,
25 command_queue: CommandQueue,
26 paths_rasterization_pipeline_state: metal::RenderPipelineState,
27 path_sprites_pipeline_state: metal::RenderPipelineState,
28 shadows_pipeline_state: metal::RenderPipelineState,
29 quads_pipeline_state: metal::RenderPipelineState,
30 underlines_pipeline_state: metal::RenderPipelineState,
31 monochrome_sprites_pipeline_state: metal::RenderPipelineState,
32 polychrome_sprites_pipeline_state: metal::RenderPipelineState,
33 surfaces_pipeline_state: metal::RenderPipelineState,
34 unit_vertices: metal::Buffer,
35 instances: metal::Buffer,
36 sprite_atlas: Arc<MetalAtlas>,
37 core_video_texture_cache: CVMetalTextureCache,
38}
39
40impl MetalRenderer {
41 pub fn new(is_opaque: bool) -> Self {
42 let device: metal::Device = if let Some(device) = metal::Device::system_default() {
43 device
44 } else {
45 log::error!("unable to access a compatible graphics device");
46 std::process::exit(1);
47 };
48
49 let layer = metal::MetalLayer::new();
50 layer.set_device(&device);
51 layer.set_pixel_format(MTLPixelFormat::BGRA8Unorm);
52 layer.set_presents_with_transaction(true);
53 layer.set_opaque(is_opaque);
54 unsafe {
55 let _: () = msg_send![&*layer, setAllowsNextDrawableTimeout: NO];
56 let _: () = msg_send![&*layer, setNeedsDisplayOnBoundsChange: YES];
57 let _: () = msg_send![
58 &*layer,
59 setAutoresizingMask: AutoresizingMask::WIDTH_SIZABLE
60 | AutoresizingMask::HEIGHT_SIZABLE
61 ];
62 }
63
64 let library = device
65 .new_library_with_data(SHADERS_METALLIB)
66 .expect("error building metal library");
67
68 fn to_float2_bits(point: crate::PointF) -> u64 {
69 let mut output = point.y.to_bits() as u64;
70 output <<= 32;
71 output |= point.x.to_bits() as u64;
72 output
73 }
74
75 let unit_vertices = [
76 to_float2_bits(point(0., 0.)),
77 to_float2_bits(point(1., 0.)),
78 to_float2_bits(point(0., 1.)),
79 to_float2_bits(point(0., 1.)),
80 to_float2_bits(point(1., 0.)),
81 to_float2_bits(point(1., 1.)),
82 ];
83 let unit_vertices = device.new_buffer_with_data(
84 unit_vertices.as_ptr() as *const c_void,
85 mem::size_of_val(&unit_vertices) as u64,
86 MTLResourceOptions::StorageModeManaged,
87 );
88 let instances = device.new_buffer(
89 INSTANCE_BUFFER_SIZE as u64,
90 MTLResourceOptions::StorageModeManaged,
91 );
92
93 let paths_rasterization_pipeline_state = build_path_rasterization_pipeline_state(
94 &device,
95 &library,
96 "paths_rasterization",
97 "path_rasterization_vertex",
98 "path_rasterization_fragment",
99 MTLPixelFormat::R16Float,
100 );
101 let path_sprites_pipeline_state = build_pipeline_state(
102 &device,
103 &library,
104 "path_sprites",
105 "path_sprite_vertex",
106 "path_sprite_fragment",
107 MTLPixelFormat::BGRA8Unorm,
108 );
109 let shadows_pipeline_state = build_pipeline_state(
110 &device,
111 &library,
112 "shadows",
113 "shadow_vertex",
114 "shadow_fragment",
115 MTLPixelFormat::BGRA8Unorm,
116 );
117 let quads_pipeline_state = build_pipeline_state(
118 &device,
119 &library,
120 "quads",
121 "quad_vertex",
122 "quad_fragment",
123 MTLPixelFormat::BGRA8Unorm,
124 );
125 let underlines_pipeline_state = build_pipeline_state(
126 &device,
127 &library,
128 "underlines",
129 "underline_vertex",
130 "underline_fragment",
131 MTLPixelFormat::BGRA8Unorm,
132 );
133 let monochrome_sprites_pipeline_state = build_pipeline_state(
134 &device,
135 &library,
136 "monochrome_sprites",
137 "monochrome_sprite_vertex",
138 "monochrome_sprite_fragment",
139 MTLPixelFormat::BGRA8Unorm,
140 );
141 let polychrome_sprites_pipeline_state = build_pipeline_state(
142 &device,
143 &library,
144 "polychrome_sprites",
145 "polychrome_sprite_vertex",
146 "polychrome_sprite_fragment",
147 MTLPixelFormat::BGRA8Unorm,
148 );
149 let surfaces_pipeline_state = build_pipeline_state(
150 &device,
151 &library,
152 "surfaces",
153 "surface_vertex",
154 "surface_fragment",
155 MTLPixelFormat::BGRA8Unorm,
156 );
157
158 let command_queue = device.new_command_queue();
159 let sprite_atlas = Arc::new(MetalAtlas::new(device.clone()));
160
161 Self {
162 layer,
163 command_queue,
164 paths_rasterization_pipeline_state,
165 path_sprites_pipeline_state,
166 shadows_pipeline_state,
167 quads_pipeline_state,
168 underlines_pipeline_state,
169 monochrome_sprites_pipeline_state,
170 polychrome_sprites_pipeline_state,
171 surfaces_pipeline_state,
172 unit_vertices,
173 instances,
174 sprite_atlas,
175 core_video_texture_cache: unsafe { CVMetalTextureCache::new(device.as_ptr()).unwrap() },
176 }
177 }
178
179 pub fn layer(&self) -> &metal::MetalLayerRef {
180 &self.layer
181 }
182
183 pub fn sprite_atlas(&self) -> &Arc<MetalAtlas> {
184 &self.sprite_atlas
185 }
186
187 pub fn draw(&mut self, scene: &Scene) {
188 let layer = self.layer.clone();
189 let viewport_size = layer.drawable_size();
190 let viewport_size: Size<DevicePixels> = size(
191 (viewport_size.width.ceil() as i32).into(),
192 (viewport_size.height.ceil() as i32).into(),
193 );
194 let drawable = if let Some(drawable) = layer.next_drawable() {
195 drawable
196 } else {
197 log::error!(
198 "failed to retrieve next drawable, drawable size: {:?}",
199 viewport_size
200 );
201 return;
202 };
203 let command_queue = self.command_queue.clone();
204 let command_buffer = command_queue.new_command_buffer();
205 let mut instance_offset = 0;
206
207 let Some(path_tiles) =
208 self.rasterize_paths(scene.paths(), &mut instance_offset, command_buffer)
209 else {
210 panic!("failed to rasterize {} paths", scene.paths().len());
211 };
212
213 let render_pass_descriptor = metal::RenderPassDescriptor::new();
214 let color_attachment = render_pass_descriptor
215 .color_attachments()
216 .object_at(0)
217 .unwrap();
218
219 color_attachment.set_texture(Some(drawable.texture()));
220 color_attachment.set_load_action(metal::MTLLoadAction::Clear);
221 color_attachment.set_store_action(metal::MTLStoreAction::Store);
222 let alpha = if self.layer.is_opaque() { 1. } else { 0. };
223 color_attachment.set_clear_color(metal::MTLClearColor::new(0., 0., 0., alpha));
224 let command_encoder = command_buffer.new_render_command_encoder(render_pass_descriptor);
225
226 command_encoder.set_viewport(metal::MTLViewport {
227 originX: 0.0,
228 originY: 0.0,
229 width: i32::from(viewport_size.width) as f64,
230 height: i32::from(viewport_size.height) as f64,
231 znear: 0.0,
232 zfar: 1.0,
233 });
234 for batch in scene.batches() {
235 let ok = match batch {
236 PrimitiveBatch::Shadows(shadows) => self.draw_shadows(
237 shadows,
238 &mut instance_offset,
239 viewport_size,
240 command_encoder,
241 ),
242 PrimitiveBatch::Quads(quads) => {
243 self.draw_quads(quads, &mut instance_offset, viewport_size, command_encoder)
244 }
245 PrimitiveBatch::Paths(paths) => self.draw_paths(
246 paths,
247 &path_tiles,
248 &mut instance_offset,
249 viewport_size,
250 command_encoder,
251 ),
252 PrimitiveBatch::Underlines(underlines) => self.draw_underlines(
253 underlines,
254 &mut instance_offset,
255 viewport_size,
256 command_encoder,
257 ),
258 PrimitiveBatch::MonochromeSprites {
259 texture_id,
260 sprites,
261 } => self.draw_monochrome_sprites(
262 texture_id,
263 sprites,
264 &mut instance_offset,
265 viewport_size,
266 command_encoder,
267 ),
268 PrimitiveBatch::PolychromeSprites {
269 texture_id,
270 sprites,
271 } => self.draw_polychrome_sprites(
272 texture_id,
273 sprites,
274 &mut instance_offset,
275 viewport_size,
276 command_encoder,
277 ),
278 PrimitiveBatch::Surfaces(surfaces) => self.draw_surfaces(
279 surfaces,
280 &mut instance_offset,
281 viewport_size,
282 command_encoder,
283 ),
284 };
285
286 if !ok {
287 panic!("scene too large: {} paths, {} shadows, {} quads, {} underlines, {} mono, {} poly, {} surfaces",
288 scene.paths.len(),
289 scene.shadows.len(),
290 scene.quads.len(),
291 scene.underlines.len(),
292 scene.monochrome_sprites.len(),
293 scene.polychrome_sprites.len(),
294 scene.surfaces.len(),
295 )
296 }
297 }
298
299 command_encoder.end_encoding();
300
301 self.instances.did_modify_range(NSRange {
302 location: 0,
303 length: instance_offset as NSUInteger,
304 });
305
306 command_buffer.commit();
307 self.sprite_atlas.clear_textures(AtlasTextureKind::Path);
308
309 command_buffer.wait_until_completed();
310 drawable.present();
311 }
312
313 fn rasterize_paths(
314 &mut self,
315 paths: &[Path<ScaledPixels>],
316 offset: &mut usize,
317 command_buffer: &metal::CommandBufferRef,
318 ) -> Option<HashMap<PathId, AtlasTile>> {
319 let mut tiles = HashMap::default();
320 let mut vertices_by_texture_id = HashMap::default();
321 for path in paths {
322 let clipped_bounds = path.bounds.intersect(&path.content_mask.bounds);
323
324 let tile = self
325 .sprite_atlas
326 .allocate(clipped_bounds.size.map(Into::into), AtlasTextureKind::Path);
327 vertices_by_texture_id
328 .entry(tile.texture_id)
329 .or_insert(Vec::new())
330 .extend(path.vertices.iter().map(|vertex| PathVertex {
331 xy_position: vertex.xy_position - clipped_bounds.origin
332 + tile.bounds.origin.map(Into::into),
333 st_position: vertex.st_position,
334 content_mask: ContentMask {
335 bounds: tile.bounds.map(Into::into),
336 },
337 }));
338 tiles.insert(path.id, tile);
339 }
340
341 for (texture_id, vertices) in vertices_by_texture_id {
342 align_offset(offset);
343 let vertices_bytes_len = mem::size_of_val(vertices.as_slice());
344 let next_offset = *offset + vertices_bytes_len;
345 if next_offset > INSTANCE_BUFFER_SIZE {
346 return None;
347 }
348
349 let render_pass_descriptor = metal::RenderPassDescriptor::new();
350 let color_attachment = render_pass_descriptor
351 .color_attachments()
352 .object_at(0)
353 .unwrap();
354
355 let texture = self.sprite_atlas.metal_texture(texture_id);
356 color_attachment.set_texture(Some(&texture));
357 color_attachment.set_load_action(metal::MTLLoadAction::Clear);
358 color_attachment.set_store_action(metal::MTLStoreAction::Store);
359 color_attachment.set_clear_color(metal::MTLClearColor::new(0., 0., 0., 1.));
360 let command_encoder = command_buffer.new_render_command_encoder(render_pass_descriptor);
361 command_encoder.set_render_pipeline_state(&self.paths_rasterization_pipeline_state);
362 command_encoder.set_vertex_buffer(
363 PathRasterizationInputIndex::Vertices as u64,
364 Some(&self.instances),
365 *offset as u64,
366 );
367 let texture_size = Size {
368 width: DevicePixels::from(texture.width()),
369 height: DevicePixels::from(texture.height()),
370 };
371 command_encoder.set_vertex_bytes(
372 PathRasterizationInputIndex::AtlasTextureSize as u64,
373 mem::size_of_val(&texture_size) as u64,
374 &texture_size as *const Size<DevicePixels> as *const _,
375 );
376
377 let buffer_contents = unsafe { (self.instances.contents() as *mut u8).add(*offset) };
378 unsafe {
379 ptr::copy_nonoverlapping(
380 vertices.as_ptr() as *const u8,
381 buffer_contents,
382 vertices_bytes_len,
383 );
384 }
385
386 command_encoder.draw_primitives(
387 metal::MTLPrimitiveType::Triangle,
388 0,
389 vertices.len() as u64,
390 );
391 command_encoder.end_encoding();
392 *offset = next_offset;
393 }
394
395 Some(tiles)
396 }
397
398 fn draw_shadows(
399 &mut self,
400 shadows: &[Shadow],
401 offset: &mut usize,
402 viewport_size: Size<DevicePixels>,
403 command_encoder: &metal::RenderCommandEncoderRef,
404 ) -> bool {
405 if shadows.is_empty() {
406 return true;
407 }
408 align_offset(offset);
409
410 command_encoder.set_render_pipeline_state(&self.shadows_pipeline_state);
411 command_encoder.set_vertex_buffer(
412 ShadowInputIndex::Vertices as u64,
413 Some(&self.unit_vertices),
414 0,
415 );
416 command_encoder.set_vertex_buffer(
417 ShadowInputIndex::Shadows as u64,
418 Some(&self.instances),
419 *offset as u64,
420 );
421 command_encoder.set_fragment_buffer(
422 ShadowInputIndex::Shadows as u64,
423 Some(&self.instances),
424 *offset as u64,
425 );
426
427 command_encoder.set_vertex_bytes(
428 ShadowInputIndex::ViewportSize as u64,
429 mem::size_of_val(&viewport_size) as u64,
430 &viewport_size as *const Size<DevicePixels> as *const _,
431 );
432
433 let shadow_bytes_len = mem::size_of_val(shadows);
434 let buffer_contents = unsafe { (self.instances.contents() as *mut u8).add(*offset) };
435
436 let next_offset = *offset + shadow_bytes_len;
437 if next_offset > INSTANCE_BUFFER_SIZE {
438 return false;
439 }
440
441 unsafe {
442 ptr::copy_nonoverlapping(
443 shadows.as_ptr() as *const u8,
444 buffer_contents,
445 shadow_bytes_len,
446 );
447 }
448
449 command_encoder.draw_primitives_instanced(
450 metal::MTLPrimitiveType::Triangle,
451 0,
452 6,
453 shadows.len() as u64,
454 );
455 *offset = next_offset;
456 true
457 }
458
459 fn draw_quads(
460 &mut self,
461 quads: &[Quad],
462 offset: &mut usize,
463 viewport_size: Size<DevicePixels>,
464 command_encoder: &metal::RenderCommandEncoderRef,
465 ) -> bool {
466 if quads.is_empty() {
467 return true;
468 }
469 align_offset(offset);
470
471 command_encoder.set_render_pipeline_state(&self.quads_pipeline_state);
472 command_encoder.set_vertex_buffer(
473 QuadInputIndex::Vertices as u64,
474 Some(&self.unit_vertices),
475 0,
476 );
477 command_encoder.set_vertex_buffer(
478 QuadInputIndex::Quads as u64,
479 Some(&self.instances),
480 *offset as u64,
481 );
482 command_encoder.set_fragment_buffer(
483 QuadInputIndex::Quads as u64,
484 Some(&self.instances),
485 *offset as u64,
486 );
487
488 command_encoder.set_vertex_bytes(
489 QuadInputIndex::ViewportSize as u64,
490 mem::size_of_val(&viewport_size) as u64,
491 &viewport_size as *const Size<DevicePixels> as *const _,
492 );
493
494 let quad_bytes_len = mem::size_of_val(quads);
495 let buffer_contents = unsafe { (self.instances.contents() as *mut u8).add(*offset) };
496
497 let next_offset = *offset + quad_bytes_len;
498 if next_offset > INSTANCE_BUFFER_SIZE {
499 return false;
500 }
501
502 unsafe {
503 ptr::copy_nonoverlapping(quads.as_ptr() as *const u8, buffer_contents, quad_bytes_len);
504 }
505
506 command_encoder.draw_primitives_instanced(
507 metal::MTLPrimitiveType::Triangle,
508 0,
509 6,
510 quads.len() as u64,
511 );
512 *offset = next_offset;
513 true
514 }
515
516 fn draw_paths(
517 &mut self,
518 paths: &[Path<ScaledPixels>],
519 tiles_by_path_id: &HashMap<PathId, AtlasTile>,
520 offset: &mut usize,
521 viewport_size: Size<DevicePixels>,
522 command_encoder: &metal::RenderCommandEncoderRef,
523 ) -> bool {
524 if paths.is_empty() {
525 return true;
526 }
527
528 command_encoder.set_render_pipeline_state(&self.path_sprites_pipeline_state);
529 command_encoder.set_vertex_buffer(
530 SpriteInputIndex::Vertices as u64,
531 Some(&self.unit_vertices),
532 0,
533 );
534 command_encoder.set_vertex_bytes(
535 SpriteInputIndex::ViewportSize as u64,
536 mem::size_of_val(&viewport_size) as u64,
537 &viewport_size as *const Size<DevicePixels> as *const _,
538 );
539
540 let mut prev_texture_id = None;
541 let mut sprites = SmallVec::<[_; 1]>::new();
542 let mut paths_and_tiles = paths
543 .iter()
544 .map(|path| (path, tiles_by_path_id.get(&path.id).unwrap()))
545 .peekable();
546
547 loop {
548 if let Some((path, tile)) = paths_and_tiles.peek() {
549 if prev_texture_id.map_or(true, |texture_id| texture_id == tile.texture_id) {
550 prev_texture_id = Some(tile.texture_id);
551 let origin = path.bounds.intersect(&path.content_mask.bounds).origin;
552 sprites.push(PathSprite {
553 bounds: Bounds {
554 origin: origin.map(|p| p.floor()),
555 size: tile.bounds.size.map(Into::into),
556 },
557 color: path.color,
558 tile: (*tile).clone(),
559 });
560 paths_and_tiles.next();
561 continue;
562 }
563 }
564
565 if sprites.is_empty() {
566 break;
567 } else {
568 align_offset(offset);
569 let texture_id = prev_texture_id.take().unwrap();
570 let texture: metal::Texture = self.sprite_atlas.metal_texture(texture_id);
571 let texture_size = size(
572 DevicePixels(texture.width() as i32),
573 DevicePixels(texture.height() as i32),
574 );
575
576 command_encoder.set_vertex_buffer(
577 SpriteInputIndex::Sprites as u64,
578 Some(&self.instances),
579 *offset as u64,
580 );
581 command_encoder.set_vertex_bytes(
582 SpriteInputIndex::AtlasTextureSize as u64,
583 mem::size_of_val(&texture_size) as u64,
584 &texture_size as *const Size<DevicePixels> as *const _,
585 );
586 command_encoder.set_fragment_buffer(
587 SpriteInputIndex::Sprites as u64,
588 Some(&self.instances),
589 *offset as u64,
590 );
591 command_encoder
592 .set_fragment_texture(SpriteInputIndex::AtlasTexture as u64, Some(&texture));
593
594 let sprite_bytes_len = mem::size_of_val(sprites.as_slice());
595 let next_offset = *offset + sprite_bytes_len;
596 if next_offset > INSTANCE_BUFFER_SIZE {
597 return false;
598 }
599
600 let buffer_contents =
601 unsafe { (self.instances.contents() as *mut u8).add(*offset) };
602
603 unsafe {
604 ptr::copy_nonoverlapping(
605 sprites.as_ptr() as *const u8,
606 buffer_contents,
607 sprite_bytes_len,
608 );
609 }
610
611 command_encoder.draw_primitives_instanced(
612 metal::MTLPrimitiveType::Triangle,
613 0,
614 6,
615 sprites.len() as u64,
616 );
617 *offset = next_offset;
618 sprites.clear();
619 }
620 }
621 true
622 }
623
624 fn draw_underlines(
625 &mut self,
626 underlines: &[Underline],
627 offset: &mut usize,
628 viewport_size: Size<DevicePixels>,
629 command_encoder: &metal::RenderCommandEncoderRef,
630 ) -> bool {
631 if underlines.is_empty() {
632 return true;
633 }
634 align_offset(offset);
635
636 command_encoder.set_render_pipeline_state(&self.underlines_pipeline_state);
637 command_encoder.set_vertex_buffer(
638 UnderlineInputIndex::Vertices as u64,
639 Some(&self.unit_vertices),
640 0,
641 );
642 command_encoder.set_vertex_buffer(
643 UnderlineInputIndex::Underlines as u64,
644 Some(&self.instances),
645 *offset as u64,
646 );
647 command_encoder.set_fragment_buffer(
648 UnderlineInputIndex::Underlines as u64,
649 Some(&self.instances),
650 *offset as u64,
651 );
652
653 command_encoder.set_vertex_bytes(
654 UnderlineInputIndex::ViewportSize as u64,
655 mem::size_of_val(&viewport_size) as u64,
656 &viewport_size as *const Size<DevicePixels> as *const _,
657 );
658
659 let underline_bytes_len = mem::size_of_val(underlines);
660 let buffer_contents = unsafe { (self.instances.contents() as *mut u8).add(*offset) };
661
662 let next_offset = *offset + underline_bytes_len;
663 if next_offset > INSTANCE_BUFFER_SIZE {
664 return false;
665 }
666
667 unsafe {
668 ptr::copy_nonoverlapping(
669 underlines.as_ptr() as *const u8,
670 buffer_contents,
671 underline_bytes_len,
672 );
673 }
674
675 command_encoder.draw_primitives_instanced(
676 metal::MTLPrimitiveType::Triangle,
677 0,
678 6,
679 underlines.len() as u64,
680 );
681 *offset = next_offset;
682 true
683 }
684
685 fn draw_monochrome_sprites(
686 &mut self,
687 texture_id: AtlasTextureId,
688 sprites: &[MonochromeSprite],
689 offset: &mut usize,
690 viewport_size: Size<DevicePixels>,
691 command_encoder: &metal::RenderCommandEncoderRef,
692 ) -> bool {
693 if sprites.is_empty() {
694 return true;
695 }
696 align_offset(offset);
697
698 let texture = self.sprite_atlas.metal_texture(texture_id);
699 let texture_size = size(
700 DevicePixels(texture.width() as i32),
701 DevicePixels(texture.height() as i32),
702 );
703 command_encoder.set_render_pipeline_state(&self.monochrome_sprites_pipeline_state);
704 command_encoder.set_vertex_buffer(
705 SpriteInputIndex::Vertices as u64,
706 Some(&self.unit_vertices),
707 0,
708 );
709 command_encoder.set_vertex_buffer(
710 SpriteInputIndex::Sprites as u64,
711 Some(&self.instances),
712 *offset as u64,
713 );
714 command_encoder.set_vertex_bytes(
715 SpriteInputIndex::ViewportSize as u64,
716 mem::size_of_val(&viewport_size) as u64,
717 &viewport_size as *const Size<DevicePixels> as *const _,
718 );
719 command_encoder.set_vertex_bytes(
720 SpriteInputIndex::AtlasTextureSize as u64,
721 mem::size_of_val(&texture_size) as u64,
722 &texture_size as *const Size<DevicePixels> as *const _,
723 );
724 command_encoder.set_fragment_buffer(
725 SpriteInputIndex::Sprites as u64,
726 Some(&self.instances),
727 *offset as u64,
728 );
729 command_encoder.set_fragment_texture(SpriteInputIndex::AtlasTexture as u64, Some(&texture));
730
731 let sprite_bytes_len = mem::size_of_val(sprites);
732 let buffer_contents = unsafe { (self.instances.contents() as *mut u8).add(*offset) };
733
734 let next_offset = *offset + sprite_bytes_len;
735 if next_offset > INSTANCE_BUFFER_SIZE {
736 return false;
737 }
738
739 unsafe {
740 ptr::copy_nonoverlapping(
741 sprites.as_ptr() as *const u8,
742 buffer_contents,
743 sprite_bytes_len,
744 );
745 }
746
747 command_encoder.draw_primitives_instanced(
748 metal::MTLPrimitiveType::Triangle,
749 0,
750 6,
751 sprites.len() as u64,
752 );
753 *offset = next_offset;
754 true
755 }
756
757 fn draw_polychrome_sprites(
758 &mut self,
759 texture_id: AtlasTextureId,
760 sprites: &[PolychromeSprite],
761 offset: &mut usize,
762 viewport_size: Size<DevicePixels>,
763 command_encoder: &metal::RenderCommandEncoderRef,
764 ) -> bool {
765 if sprites.is_empty() {
766 return true;
767 }
768 align_offset(offset);
769
770 let texture = self.sprite_atlas.metal_texture(texture_id);
771 let texture_size = size(
772 DevicePixels(texture.width() as i32),
773 DevicePixels(texture.height() as i32),
774 );
775 command_encoder.set_render_pipeline_state(&self.polychrome_sprites_pipeline_state);
776 command_encoder.set_vertex_buffer(
777 SpriteInputIndex::Vertices as u64,
778 Some(&self.unit_vertices),
779 0,
780 );
781 command_encoder.set_vertex_buffer(
782 SpriteInputIndex::Sprites as u64,
783 Some(&self.instances),
784 *offset as u64,
785 );
786 command_encoder.set_vertex_bytes(
787 SpriteInputIndex::ViewportSize as u64,
788 mem::size_of_val(&viewport_size) as u64,
789 &viewport_size as *const Size<DevicePixels> as *const _,
790 );
791 command_encoder.set_vertex_bytes(
792 SpriteInputIndex::AtlasTextureSize as u64,
793 mem::size_of_val(&texture_size) as u64,
794 &texture_size as *const Size<DevicePixels> as *const _,
795 );
796 command_encoder.set_fragment_buffer(
797 SpriteInputIndex::Sprites as u64,
798 Some(&self.instances),
799 *offset as u64,
800 );
801 command_encoder.set_fragment_texture(SpriteInputIndex::AtlasTexture as u64, Some(&texture));
802
803 let sprite_bytes_len = mem::size_of_val(sprites);
804 let buffer_contents = unsafe { (self.instances.contents() as *mut u8).add(*offset) };
805
806 let next_offset = *offset + sprite_bytes_len;
807 if next_offset > INSTANCE_BUFFER_SIZE {
808 return false;
809 }
810
811 unsafe {
812 ptr::copy_nonoverlapping(
813 sprites.as_ptr() as *const u8,
814 buffer_contents,
815 sprite_bytes_len,
816 );
817 }
818
819 command_encoder.draw_primitives_instanced(
820 metal::MTLPrimitiveType::Triangle,
821 0,
822 6,
823 sprites.len() as u64,
824 );
825 *offset = next_offset;
826 true
827 }
828
829 fn draw_surfaces(
830 &mut self,
831 surfaces: &[Surface],
832 offset: &mut usize,
833 viewport_size: Size<DevicePixels>,
834 command_encoder: &metal::RenderCommandEncoderRef,
835 ) -> bool {
836 command_encoder.set_render_pipeline_state(&self.surfaces_pipeline_state);
837 command_encoder.set_vertex_buffer(
838 SurfaceInputIndex::Vertices as u64,
839 Some(&self.unit_vertices),
840 0,
841 );
842 command_encoder.set_vertex_bytes(
843 SurfaceInputIndex::ViewportSize as u64,
844 mem::size_of_val(&viewport_size) as u64,
845 &viewport_size as *const Size<DevicePixels> as *const _,
846 );
847
848 for surface in surfaces {
849 let texture_size = size(
850 DevicePixels::from(surface.image_buffer.width() as i32),
851 DevicePixels::from(surface.image_buffer.height() as i32),
852 );
853
854 assert_eq!(
855 surface.image_buffer.pixel_format_type(),
856 media::core_video::kCVPixelFormatType_420YpCbCr8BiPlanarFullRange
857 );
858
859 let y_texture = unsafe {
860 self.core_video_texture_cache
861 .create_texture_from_image(
862 surface.image_buffer.as_concrete_TypeRef(),
863 ptr::null(),
864 MTLPixelFormat::R8Unorm,
865 surface.image_buffer.plane_width(0),
866 surface.image_buffer.plane_height(0),
867 0,
868 )
869 .unwrap()
870 };
871 let cb_cr_texture = unsafe {
872 self.core_video_texture_cache
873 .create_texture_from_image(
874 surface.image_buffer.as_concrete_TypeRef(),
875 ptr::null(),
876 MTLPixelFormat::RG8Unorm,
877 surface.image_buffer.plane_width(1),
878 surface.image_buffer.plane_height(1),
879 1,
880 )
881 .unwrap()
882 };
883
884 align_offset(offset);
885 let next_offset = *offset + mem::size_of::<Surface>();
886 if next_offset > INSTANCE_BUFFER_SIZE {
887 return false;
888 }
889
890 command_encoder.set_vertex_buffer(
891 SurfaceInputIndex::Surfaces as u64,
892 Some(&self.instances),
893 *offset as u64,
894 );
895 command_encoder.set_vertex_bytes(
896 SurfaceInputIndex::TextureSize as u64,
897 mem::size_of_val(&texture_size) as u64,
898 &texture_size as *const Size<DevicePixels> as *const _,
899 );
900 command_encoder.set_fragment_texture(
901 SurfaceInputIndex::YTexture as u64,
902 Some(y_texture.as_texture_ref()),
903 );
904 command_encoder.set_fragment_texture(
905 SurfaceInputIndex::CbCrTexture as u64,
906 Some(cb_cr_texture.as_texture_ref()),
907 );
908
909 unsafe {
910 let buffer_contents =
911 (self.instances.contents() as *mut u8).add(*offset) as *mut SurfaceBounds;
912 ptr::write(
913 buffer_contents,
914 SurfaceBounds {
915 bounds: surface.bounds,
916 content_mask: surface.content_mask.clone(),
917 },
918 );
919 }
920
921 command_encoder.draw_primitives(metal::MTLPrimitiveType::Triangle, 0, 6);
922 *offset = next_offset;
923 }
924 true
925 }
926}
927
928fn build_pipeline_state(
929 device: &metal::DeviceRef,
930 library: &metal::LibraryRef,
931 label: &str,
932 vertex_fn_name: &str,
933 fragment_fn_name: &str,
934 pixel_format: metal::MTLPixelFormat,
935) -> metal::RenderPipelineState {
936 let vertex_fn = library
937 .get_function(vertex_fn_name, None)
938 .expect("error locating vertex function");
939 let fragment_fn = library
940 .get_function(fragment_fn_name, None)
941 .expect("error locating fragment function");
942
943 let descriptor = metal::RenderPipelineDescriptor::new();
944 descriptor.set_label(label);
945 descriptor.set_vertex_function(Some(vertex_fn.as_ref()));
946 descriptor.set_fragment_function(Some(fragment_fn.as_ref()));
947 let color_attachment = descriptor.color_attachments().object_at(0).unwrap();
948 color_attachment.set_pixel_format(pixel_format);
949 color_attachment.set_blending_enabled(true);
950 color_attachment.set_rgb_blend_operation(metal::MTLBlendOperation::Add);
951 color_attachment.set_alpha_blend_operation(metal::MTLBlendOperation::Add);
952 color_attachment.set_source_rgb_blend_factor(metal::MTLBlendFactor::SourceAlpha);
953 color_attachment.set_source_alpha_blend_factor(metal::MTLBlendFactor::One);
954 color_attachment.set_destination_rgb_blend_factor(metal::MTLBlendFactor::OneMinusSourceAlpha);
955 color_attachment.set_destination_alpha_blend_factor(metal::MTLBlendFactor::One);
956
957 device
958 .new_render_pipeline_state(&descriptor)
959 .expect("could not create render pipeline state")
960}
961
962fn build_path_rasterization_pipeline_state(
963 device: &metal::DeviceRef,
964 library: &metal::LibraryRef,
965 label: &str,
966 vertex_fn_name: &str,
967 fragment_fn_name: &str,
968 pixel_format: metal::MTLPixelFormat,
969) -> metal::RenderPipelineState {
970 let vertex_fn = library
971 .get_function(vertex_fn_name, None)
972 .expect("error locating vertex function");
973 let fragment_fn = library
974 .get_function(fragment_fn_name, None)
975 .expect("error locating fragment function");
976
977 let descriptor = metal::RenderPipelineDescriptor::new();
978 descriptor.set_label(label);
979 descriptor.set_vertex_function(Some(vertex_fn.as_ref()));
980 descriptor.set_fragment_function(Some(fragment_fn.as_ref()));
981 let color_attachment = descriptor.color_attachments().object_at(0).unwrap();
982 color_attachment.set_pixel_format(pixel_format);
983 color_attachment.set_blending_enabled(true);
984 color_attachment.set_rgb_blend_operation(metal::MTLBlendOperation::Add);
985 color_attachment.set_alpha_blend_operation(metal::MTLBlendOperation::Add);
986 color_attachment.set_source_rgb_blend_factor(metal::MTLBlendFactor::One);
987 color_attachment.set_source_alpha_blend_factor(metal::MTLBlendFactor::One);
988 color_attachment.set_destination_rgb_blend_factor(metal::MTLBlendFactor::One);
989 color_attachment.set_destination_alpha_blend_factor(metal::MTLBlendFactor::One);
990
991 device
992 .new_render_pipeline_state(&descriptor)
993 .expect("could not create render pipeline state")
994}
995
996// Align to multiples of 256 make Metal happy.
997fn align_offset(offset: &mut usize) {
998 *offset = ((*offset + 255) / 256) * 256;
999}
1000
1001#[repr(C)]
1002enum ShadowInputIndex {
1003 Vertices = 0,
1004 Shadows = 1,
1005 ViewportSize = 2,
1006}
1007
1008#[repr(C)]
1009enum QuadInputIndex {
1010 Vertices = 0,
1011 Quads = 1,
1012 ViewportSize = 2,
1013}
1014
1015#[repr(C)]
1016enum UnderlineInputIndex {
1017 Vertices = 0,
1018 Underlines = 1,
1019 ViewportSize = 2,
1020}
1021
1022#[repr(C)]
1023enum SpriteInputIndex {
1024 Vertices = 0,
1025 Sprites = 1,
1026 ViewportSize = 2,
1027 AtlasTextureSize = 3,
1028 AtlasTexture = 4,
1029}
1030
1031#[repr(C)]
1032enum SurfaceInputIndex {
1033 Vertices = 0,
1034 Surfaces = 1,
1035 ViewportSize = 2,
1036 TextureSize = 3,
1037 YTexture = 4,
1038 CbCrTexture = 5,
1039}
1040
1041#[repr(C)]
1042enum PathRasterizationInputIndex {
1043 Vertices = 0,
1044 AtlasTextureSize = 1,
1045}
1046
1047#[derive(Clone, Debug, Eq, PartialEq)]
1048#[repr(C)]
1049pub struct PathSprite {
1050 pub bounds: Bounds<ScaledPixels>,
1051 pub color: Hsla,
1052 pub tile: AtlasTile,
1053}
1054
1055#[derive(Clone, Debug, Eq, PartialEq)]
1056#[repr(C)]
1057pub struct SurfaceBounds {
1058 pub bounds: Bounds<ScaledPixels>,
1059 pub content_mask: ContentMask<ScaledPixels>,
1060}