/
tiling.rs
1020 lines (925 loc) · 37 KB
/
tiling.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use api::{ColorF, DeviceIntPoint, DeviceIntRect, DeviceIntSize, DevicePixelScale, DeviceUintPoint};
use api::{DeviceUintRect, DeviceUintSize, DocumentLayer, FilterOp, ImageFormat, LayoutRect};
use api::{MixBlendMode, PipelineId};
use batch::{AlphaBatchBuilder, AlphaBatchContainer, ClipBatcher, resolve_image};
use clip::{ClipStore};
use clip_scroll_tree::{ClipScrollTree, ClipScrollNodeIndex};
use device::{FrameId, Texture};
#[cfg(feature = "pathfinder")]
use euclid::{TypedPoint2D, TypedVector2D};
use gpu_cache::{GpuCache};
use gpu_types::{BorderInstance, BlurDirection, BlurInstance};
use gpu_types::{ClipScrollNodeData, ZBufferIdGenerator};
use internal_types::{FastHashMap, SavedTargetIndex, SourceTexture};
#[cfg(feature = "pathfinder")]
use pathfinder_partitioner::mesh::Mesh;
use prim_store::{CachedGradient, PrimitiveIndex, PrimitiveKind, PrimitiveStore};
use prim_store::{BrushKind, DeferredResolve};
use profiler::FrameProfileCounters;
use render_task::{BlitSource, RenderTaskAddress, RenderTaskId, RenderTaskKind};
use render_task::{BlurTask, ClearMode, GlyphTask, RenderTaskLocation, RenderTaskTree};
use resource_cache::ResourceCache;
use std::{cmp, usize, f32, i32, mem};
use texture_allocator::GuillotineAllocator;
#[cfg(feature = "pathfinder")]
use webrender_api::{DevicePixel, FontRenderMode};
const MIN_TARGET_SIZE: u32 = 2048;
#[derive(Debug)]
pub struct ScrollbarPrimitive {
pub scroll_frame_index: ClipScrollNodeIndex,
pub prim_index: PrimitiveIndex,
pub frame_rect: LayoutRect,
}
#[derive(Debug, Copy, Clone)]
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct RenderTargetIndex(pub usize);
pub struct RenderTargetContext<'a, 'rc> {
pub device_pixel_scale: DevicePixelScale,
pub prim_store: &'a PrimitiveStore,
pub resource_cache: &'rc mut ResourceCache,
pub clip_scroll_tree: &'a ClipScrollTree,
pub use_dual_source_blending: bool,
pub node_data: &'a [ClipScrollNodeData],
pub cached_gradients: &'a [CachedGradient],
}
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
struct TextureAllocator {
// TODO(gw): Replace this with a simpler allocator for
// render target allocation - this use case doesn't need
// to deal with coalescing etc that the general texture
// cache allocator requires.
allocator: GuillotineAllocator,
// Track the used rect of the render target, so that
// we can set a scissor rect and only clear to the
// used portion of the target as an optimization.
used_rect: DeviceIntRect,
}
impl TextureAllocator {
fn new(size: DeviceUintSize) -> Self {
TextureAllocator {
allocator: GuillotineAllocator::new(size),
used_rect: DeviceIntRect::zero(),
}
}
fn allocate(&mut self, size: &DeviceUintSize) -> Option<DeviceUintPoint> {
let origin = self.allocator.allocate(size);
if let Some(origin) = origin {
// TODO(gw): We need to make all the device rects
// be consistent in the use of the
// DeviceIntRect and DeviceUintRect types!
let origin = DeviceIntPoint::new(origin.x as i32, origin.y as i32);
let size = DeviceIntSize::new(size.width as i32, size.height as i32);
let rect = DeviceIntRect::new(origin, size);
self.used_rect = rect.union(&self.used_rect);
}
origin
}
}
pub trait RenderTarget {
fn new(
size: Option<DeviceUintSize>,
screen_size: DeviceIntSize,
) -> Self;
fn allocate(&mut self, size: DeviceUintSize) -> Option<DeviceUintPoint>;
fn build(
&mut self,
_ctx: &mut RenderTargetContext,
_gpu_cache: &mut GpuCache,
_render_tasks: &mut RenderTaskTree,
_deferred_resolves: &mut Vec<DeferredResolve>,
) {
}
// TODO(gw): It's a bit odd that we need the deferred resolves and mutable
// GPU cache here. They are typically used by the build step
// above. They are used for the blit jobs to allow resolve_image
// to be called. It's a bit of extra overhead to store the image
// key here and the resolve them in the build step separately.
// BUT: if/when we add more texture cache target jobs, we might
// want to tidy this up.
fn add_task(
&mut self,
task_id: RenderTaskId,
ctx: &RenderTargetContext,
gpu_cache: &mut GpuCache,
render_tasks: &RenderTaskTree,
clip_store: &ClipStore,
deferred_resolves: &mut Vec<DeferredResolve>,
);
fn used_rect(&self) -> DeviceIntRect;
fn needs_depth(&self) -> bool;
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub enum RenderTargetKind {
Color, // RGBA32
Alpha, // R8
}
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct RenderTargetList<T> {
screen_size: DeviceIntSize,
pub format: ImageFormat,
pub max_size: DeviceUintSize,
pub targets: Vec<T>,
pub saved_index: Option<SavedTargetIndex>,
pub is_shared: bool,
}
impl<T: RenderTarget> RenderTargetList<T> {
fn new(
screen_size: DeviceIntSize,
format: ImageFormat,
) -> Self {
RenderTargetList {
screen_size,
format,
max_size: DeviceUintSize::new(MIN_TARGET_SIZE, MIN_TARGET_SIZE),
targets: Vec::new(),
saved_index: None,
is_shared: false,
}
}
fn build(
&mut self,
ctx: &mut RenderTargetContext,
gpu_cache: &mut GpuCache,
render_tasks: &mut RenderTaskTree,
deferred_resolves: &mut Vec<DeferredResolve>,
saved_index: Option<SavedTargetIndex>,
) {
debug_assert_eq!(None, self.saved_index);
self.saved_index = saved_index;
for target in &mut self.targets {
target.build(ctx, gpu_cache, render_tasks, deferred_resolves);
}
}
fn add_task(
&mut self,
task_id: RenderTaskId,
ctx: &RenderTargetContext,
gpu_cache: &mut GpuCache,
render_tasks: &mut RenderTaskTree,
clip_store: &ClipStore,
deferred_resolves: &mut Vec<DeferredResolve>,
) {
self.targets.last_mut().unwrap().add_task(
task_id,
ctx,
gpu_cache,
render_tasks,
clip_store,
deferred_resolves,
);
}
fn allocate(
&mut self,
alloc_size: DeviceUintSize,
) -> (DeviceUintPoint, RenderTargetIndex) {
let existing_origin = self.targets
.last_mut()
.and_then(|target| target.allocate(alloc_size));
let origin = match existing_origin {
Some(origin) => origin,
None => {
let mut new_target = T::new(Some(self.max_size), self.screen_size);
let origin = new_target.allocate(alloc_size).expect(&format!(
"Each render task must allocate <= size of one target! ({})",
alloc_size
));
self.targets.push(new_target);
origin
}
};
(origin, RenderTargetIndex(self.targets.len() - 1))
}
pub fn needs_depth(&self) -> bool {
self.targets.iter().any(|target| target.needs_depth())
}
pub fn check_ready(&self, t: &Texture) {
assert_eq!(t.get_dimensions(), self.max_size);
assert_eq!(t.get_format(), self.format);
assert_eq!(t.get_render_target_layer_count(), self.targets.len());
assert_eq!(t.get_layer_count() as usize, self.targets.len());
assert_eq!(t.has_depth(), t.get_rt_info().unwrap().has_depth);
assert_eq!(t.has_depth(), self.needs_depth());
}
}
/// Frame output information for a given pipeline ID.
/// Storing the task ID allows the renderer to find
/// the target rect within the render target that this
/// pipeline exists at.
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct FrameOutput {
pub task_id: RenderTaskId,
pub pipeline_id: PipelineId,
}
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct ScalingInfo {
pub src_task_id: RenderTaskId,
pub dest_task_id: RenderTaskId,
}
// Defines where the source data for a blit job can be found.
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub enum BlitJobSource {
Texture(SourceTexture, i32, DeviceIntRect),
RenderTask(RenderTaskId),
}
// Information required to do a blit from a source to a target.
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct BlitJob {
pub source: BlitJobSource,
pub target_rect: DeviceIntRect,
}
#[cfg(feature = "pathfinder")]
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct GlyphJob {
pub mesh: Mesh,
pub target_rect: DeviceIntRect,
pub origin: DeviceIntPoint,
pub subpixel_offset: TypedPoint2D<f32, DevicePixel>,
pub render_mode: FontRenderMode,
pub embolden_amount: TypedVector2D<f32, DevicePixel>,
}
#[cfg(not(feature = "pathfinder"))]
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct GlyphJob;
/// A render target represents a number of rendering operations on a surface.
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct ColorRenderTarget {
pub alpha_batch_containers: Vec<AlphaBatchContainer>,
// List of blur operations to apply for this render target.
pub vertical_blurs: Vec<BlurInstance>,
pub horizontal_blurs: Vec<BlurInstance>,
pub readbacks: Vec<DeviceIntRect>,
pub scalings: Vec<ScalingInfo>,
pub blits: Vec<BlitJob>,
// List of frame buffer outputs for this render target.
pub outputs: Vec<FrameOutput>,
allocator: Option<TextureAllocator>,
alpha_tasks: Vec<RenderTaskId>,
screen_size: DeviceIntSize,
}
impl RenderTarget for ColorRenderTarget {
fn allocate(&mut self, size: DeviceUintSize) -> Option<DeviceUintPoint> {
self.allocator
.as_mut()
.expect("bug: calling allocate on framebuffer")
.allocate(&size)
}
fn new(
size: Option<DeviceUintSize>,
screen_size: DeviceIntSize,
) -> Self {
ColorRenderTarget {
alpha_batch_containers: Vec::new(),
vertical_blurs: Vec::new(),
horizontal_blurs: Vec::new(),
readbacks: Vec::new(),
scalings: Vec::new(),
blits: Vec::new(),
allocator: size.map(TextureAllocator::new),
outputs: Vec::new(),
alpha_tasks: Vec::new(),
screen_size,
}
}
fn build(
&mut self,
ctx: &mut RenderTargetContext,
gpu_cache: &mut GpuCache,
render_tasks: &mut RenderTaskTree,
deferred_resolves: &mut Vec<DeferredResolve>,
) {
let mut merged_batches = AlphaBatchContainer::new(None);
let mut z_generator = ZBufferIdGenerator::new();
for task_id in &self.alpha_tasks {
let task = &render_tasks[*task_id];
match task.kind {
RenderTaskKind::Picture(ref pic_task) => {
let brush_index = ctx.prim_store.cpu_metadata[pic_task.prim_index.0].cpu_prim_index;
let brush = &ctx.prim_store.cpu_brushes[brush_index.0];
match brush.kind {
BrushKind::Picture { pic_index, .. } => {
let pic = &ctx.prim_store.pictures[pic_index.0];
let (target_rect, _) = task.get_target_rect();
let mut batch_builder = AlphaBatchBuilder::new(self.screen_size, target_rect);
batch_builder.add_pic_to_batch(
pic,
*task_id,
ctx,
gpu_cache,
render_tasks,
deferred_resolves,
&mut z_generator,
);
if let Some(batch_container) = batch_builder.build(&mut merged_batches) {
self.alpha_batch_containers.push(batch_container);
}
}
_ => {
unreachable!();
}
}
}
_ => {
unreachable!();
}
}
}
self.alpha_batch_containers.push(merged_batches);
}
fn add_task(
&mut self,
task_id: RenderTaskId,
ctx: &RenderTargetContext,
gpu_cache: &mut GpuCache,
render_tasks: &RenderTaskTree,
_: &ClipStore,
deferred_resolves: &mut Vec<DeferredResolve>,
) {
let task = &render_tasks[task_id];
match task.kind {
RenderTaskKind::VerticalBlur(ref info) => {
info.add_instances(
&mut self.vertical_blurs,
BlurDirection::Vertical,
render_tasks.get_task_address(task_id),
render_tasks.get_task_address(task.children[0]),
);
}
RenderTaskKind::HorizontalBlur(ref info) => {
info.add_instances(
&mut self.horizontal_blurs,
BlurDirection::Horizontal,
render_tasks.get_task_address(task_id),
render_tasks.get_task_address(task.children[0]),
);
}
RenderTaskKind::Picture(ref task_info) => {
let prim_metadata = ctx.prim_store.get_metadata(task_info.prim_index);
match prim_metadata.prim_kind {
PrimitiveKind::Brush => {
let brush = &ctx.prim_store.cpu_brushes[prim_metadata.cpu_prim_index.0];
let pic = &ctx.prim_store.pictures[brush.get_picture_index().0];
self.alpha_tasks.push(task_id);
// If this pipeline is registered as a frame output
// store the information necessary to do the copy.
if let Some(pipeline_id) = pic.frame_output_pipeline_id {
self.outputs.push(FrameOutput {
pipeline_id,
task_id,
});
}
}
_ => {
// No other primitives make use of primitive caching yet!
unreachable!()
}
}
}
RenderTaskKind::ClipRegion(..) |
RenderTaskKind::Border(..) |
RenderTaskKind::CacheMask(..) => {
panic!("Should not be added to color target!");
}
RenderTaskKind::Glyph(..) => {
// FIXME(pcwalton): Support color glyphs.
panic!("Glyphs should not be added to color target!");
}
RenderTaskKind::Readback(device_rect) => {
self.readbacks.push(device_rect);
}
RenderTaskKind::Scaling(..) => {
self.scalings.push(ScalingInfo {
src_task_id: task.children[0],
dest_task_id: task_id,
});
}
RenderTaskKind::Blit(ref task_info) => {
match task_info.source {
BlitSource::Image { key } => {
// Get the cache item for the source texture.
let cache_item = resolve_image(
key.request,
ctx.resource_cache,
gpu_cache,
deferred_resolves,
);
// Work out a source rect to copy from the texture, depending on whether
// a sub-rect is present or not.
// TODO(gw): We have much type confusion below - f32, i32 and u32 for
// various representations of the texel rects. We should make
// this consistent!
let source_rect = key.texel_rect.map_or(cache_item.uv_rect.to_i32(), |sub_rect| {
DeviceIntRect::new(
DeviceIntPoint::new(
cache_item.uv_rect.origin.x as i32 + sub_rect.origin.x,
cache_item.uv_rect.origin.y as i32 + sub_rect.origin.y,
),
sub_rect.size,
)
});
// Store the blit job for the renderer to execute, including
// the allocated destination rect within this target.
let (target_rect, _) = task.get_target_rect();
self.blits.push(BlitJob {
source: BlitJobSource::Texture(
cache_item.texture_id,
cache_item.texture_layer,
source_rect,
),
target_rect: target_rect.inner_rect(task_info.padding)
});
}
BlitSource::RenderTask { .. } => {
panic!("BUG: render task blit jobs to render tasks not supported");
}
}
}
}
}
fn used_rect(&self) -> DeviceIntRect {
self.allocator
.as_ref()
.expect("bug: used_rect called on framebuffer")
.used_rect
}
fn needs_depth(&self) -> bool {
self.alpha_batch_containers.iter().any(|ab| {
!ab.opaque_batches.is_empty()
})
}
}
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct AlphaRenderTarget {
pub clip_batcher: ClipBatcher,
// List of blur operations to apply for this render target.
pub vertical_blurs: Vec<BlurInstance>,
pub horizontal_blurs: Vec<BlurInstance>,
pub scalings: Vec<ScalingInfo>,
pub zero_clears: Vec<RenderTaskId>,
allocator: TextureAllocator,
}
impl RenderTarget for AlphaRenderTarget {
fn allocate(&mut self, size: DeviceUintSize) -> Option<DeviceUintPoint> {
self.allocator.allocate(&size)
}
fn new(
size: Option<DeviceUintSize>,
_: DeviceIntSize,
) -> Self {
AlphaRenderTarget {
clip_batcher: ClipBatcher::new(),
vertical_blurs: Vec::new(),
horizontal_blurs: Vec::new(),
scalings: Vec::new(),
zero_clears: Vec::new(),
allocator: TextureAllocator::new(size.expect("bug: alpha targets need size")),
}
}
fn add_task(
&mut self,
task_id: RenderTaskId,
ctx: &RenderTargetContext,
gpu_cache: &mut GpuCache,
render_tasks: &RenderTaskTree,
clip_store: &ClipStore,
_: &mut Vec<DeferredResolve>,
) {
let task = &render_tasks[task_id];
match task.clear_mode {
ClearMode::Zero => {
self.zero_clears.push(task_id);
}
ClearMode::One => {}
ClearMode::Transparent => {
panic!("bug: invalid clear mode for alpha task");
}
}
match task.kind {
RenderTaskKind::Readback(..) |
RenderTaskKind::Picture(..) |
RenderTaskKind::Blit(..) |
RenderTaskKind::Border(..) |
RenderTaskKind::Glyph(..) => {
panic!("BUG: should not be added to alpha target!");
}
RenderTaskKind::VerticalBlur(ref info) => {
info.add_instances(
&mut self.vertical_blurs,
BlurDirection::Vertical,
render_tasks.get_task_address(task_id),
render_tasks.get_task_address(task.children[0]),
);
}
RenderTaskKind::HorizontalBlur(ref info) => {
info.add_instances(
&mut self.horizontal_blurs,
BlurDirection::Horizontal,
render_tasks.get_task_address(task_id),
render_tasks.get_task_address(task.children[0]),
);
}
RenderTaskKind::CacheMask(ref task_info) => {
let task_address = render_tasks.get_task_address(task_id);
self.clip_batcher.add(
task_address,
&task_info.clips,
task_info.coordinate_system_id,
ctx.resource_cache,
gpu_cache,
clip_store,
);
}
RenderTaskKind::ClipRegion(ref task) => {
let task_address = render_tasks.get_task_address(task_id);
self.clip_batcher.add_clip_region(
task_address,
task.clip_data_address,
);
}
RenderTaskKind::Scaling(..) => {
self.scalings.push(ScalingInfo {
src_task_id: task.children[0],
dest_task_id: task_id,
});
}
}
}
fn used_rect(&self) -> DeviceIntRect {
self.allocator.used_rect
}
fn needs_depth(&self) -> bool {
false
}
}
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct TextureCacheRenderTarget {
pub target_kind: RenderTargetKind,
pub horizontal_blurs: Vec<BlurInstance>,
pub blits: Vec<BlitJob>,
pub glyphs: Vec<GlyphJob>,
pub border_segments: Vec<BorderInstance>,
pub clears: Vec<DeviceIntRect>,
}
impl TextureCacheRenderTarget {
fn new(target_kind: RenderTargetKind) -> Self {
TextureCacheRenderTarget {
target_kind,
horizontal_blurs: vec![],
blits: vec![],
glyphs: vec![],
border_segments: vec![],
clears: vec![],
}
}
fn add_task(
&mut self,
task_id: RenderTaskId,
render_tasks: &mut RenderTaskTree,
) {
let task_address = render_tasks.get_task_address(task_id);
let src_task_address = render_tasks[task_id].children.get(0).map(|src_task_id| {
render_tasks.get_task_address(*src_task_id)
});
let task = &mut render_tasks[task_id];
let target_rect = task.get_target_rect();
match task.kind {
RenderTaskKind::HorizontalBlur(ref info) => {
info.add_instances(
&mut self.horizontal_blurs,
BlurDirection::Horizontal,
task_address,
src_task_address.unwrap(),
);
}
RenderTaskKind::Blit(ref task_info) => {
match task_info.source {
BlitSource::Image { .. } => {
// reading/writing from the texture cache at the same time
// is undefined behavior.
panic!("bug: a single blit cannot be to/from texture cache");
}
BlitSource::RenderTask { task_id } => {
// Add a blit job to copy from an existing render
// task to this target.
self.blits.push(BlitJob {
source: BlitJobSource::RenderTask(task_id),
target_rect: target_rect.0.inner_rect(task_info.padding),
});
}
}
}
RenderTaskKind::Border(ref mut task_info) => {
self.clears.push(target_rect.0);
// TODO(gw): It may be better to store the task origin in
// the render task data instead of per instance.
let task_origin = target_rect.0.origin.to_f32();
for instance in &mut task_info.instances {
instance.task_origin = task_origin;
}
let instances = mem::replace(&mut task_info.instances, Vec::new());
self.border_segments.extend(instances);
}
RenderTaskKind::Glyph(ref mut task_info) => {
self.add_glyph_task(task_info, target_rect.0)
}
RenderTaskKind::VerticalBlur(..) |
RenderTaskKind::Picture(..) |
RenderTaskKind::ClipRegion(..) |
RenderTaskKind::CacheMask(..) |
RenderTaskKind::Readback(..) |
RenderTaskKind::Scaling(..) => {
panic!("BUG: unexpected task kind for texture cache target");
}
}
}
#[cfg(feature = "pathfinder")]
fn add_glyph_task(&mut self, task_info: &mut GlyphTask, target_rect: DeviceIntRect) {
self.glyphs.push(GlyphJob {
mesh: task_info.mesh.take().unwrap(),
target_rect: target_rect,
origin: task_info.origin,
subpixel_offset: task_info.subpixel_offset,
render_mode: task_info.render_mode,
embolden_amount: task_info.embolden_amount,
})
}
#[cfg(not(feature = "pathfinder"))]
fn add_glyph_task(&mut self, _: &mut GlyphTask, _: DeviceIntRect) {}
}
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub enum RenderPassKind {
MainFramebuffer(ColorRenderTarget),
OffScreen {
alpha: RenderTargetList<AlphaRenderTarget>,
color: RenderTargetList<ColorRenderTarget>,
texture_cache: FastHashMap<(SourceTexture, i32), TextureCacheRenderTarget>,
},
}
/// A render pass represents a set of rendering operations that don't depend on one
/// another.
///
/// A render pass can have several render targets if there wasn't enough space in one
/// target to do all of the rendering for that pass.
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct RenderPass {
pub kind: RenderPassKind,
tasks: Vec<RenderTaskId>,
}
impl RenderPass {
pub fn new_main_framebuffer(screen_size: DeviceIntSize) -> Self {
let target = ColorRenderTarget::new(None, screen_size);
RenderPass {
kind: RenderPassKind::MainFramebuffer(target),
tasks: vec![],
}
}
pub fn new_off_screen(screen_size: DeviceIntSize) -> Self {
RenderPass {
kind: RenderPassKind::OffScreen {
color: RenderTargetList::new(screen_size, ImageFormat::BGRA8),
alpha: RenderTargetList::new(screen_size, ImageFormat::R8),
texture_cache: FastHashMap::default(),
},
tasks: vec![],
}
}
pub fn add_render_task(
&mut self,
task_id: RenderTaskId,
size: DeviceIntSize,
target_kind: RenderTargetKind,
) {
if let RenderPassKind::OffScreen { ref mut color, ref mut alpha, .. } = self.kind {
let max_size = match target_kind {
RenderTargetKind::Color => &mut color.max_size,
RenderTargetKind::Alpha => &mut alpha.max_size,
};
max_size.width = cmp::max(max_size.width, size.width as u32);
max_size.height = cmp::max(max_size.height, size.height as u32);
}
self.tasks.push(task_id);
}
pub fn build(
&mut self,
ctx: &mut RenderTargetContext,
gpu_cache: &mut GpuCache,
render_tasks: &mut RenderTaskTree,
deferred_resolves: &mut Vec<DeferredResolve>,
clip_store: &ClipStore,
) {
profile_scope!("RenderPass::build");
match self.kind {
RenderPassKind::MainFramebuffer(ref mut target) => {
for &task_id in &self.tasks {
assert_eq!(render_tasks[task_id].target_kind(), RenderTargetKind::Color);
target.add_task(
task_id,
ctx,
gpu_cache,
render_tasks,
clip_store,
deferred_resolves,
);
}
target.build(ctx, gpu_cache, render_tasks, deferred_resolves);
}
RenderPassKind::OffScreen { ref mut color, ref mut alpha, ref mut texture_cache } => {
let is_shared_alpha = self.tasks.iter().any(|&task_id| {
let task = &render_tasks[task_id];
task.is_shared() &&
task.target_kind() == RenderTargetKind::Alpha
});
let saved_color = if self.tasks.iter().any(|&task_id| {
let t = &render_tasks[task_id];
t.target_kind() == RenderTargetKind::Color && t.saved_index.is_some()
}) {
Some(render_tasks.save_target())
} else {
None
};
let saved_alpha = if self.tasks.iter().any(|&task_id| {
let t = &render_tasks[task_id];
t.target_kind() == RenderTargetKind::Alpha && t.saved_index.is_some()
}) {
Some(render_tasks.save_target())
} else {
None
};
// Step through each task, adding to batches as appropriate.
for &task_id in &self.tasks {
let (target_kind, texture_target) = {
let task = &mut render_tasks[task_id];
let target_kind = task.target_kind();
// Find a target to assign this task to, or create a new
// one if required.
let texture_target = match task.location {
RenderTaskLocation::TextureCache(texture_id, layer, _) => {
Some((texture_id, layer))
}
RenderTaskLocation::Fixed(..) => {
None
}
RenderTaskLocation::Dynamic(ref mut origin, size) => {
let size = size.expect("bug: size must be assigned by now");
let alloc_size = DeviceUintSize::new(size.width as u32, size.height as u32);
let (alloc_origin, target_index) = match target_kind {
RenderTargetKind::Color => color.allocate(alloc_size),
RenderTargetKind::Alpha => alpha.allocate(alloc_size),
};
*origin = Some((alloc_origin.to_i32(), target_index));
None
}
};
// Replace the pending saved index with a real one
if let Some(index) = task.saved_index {
assert_eq!(index, SavedTargetIndex::PENDING);
task.saved_index = match target_kind {
RenderTargetKind::Color => saved_color,
RenderTargetKind::Alpha => saved_alpha,
};
}
// Give the render task an opportunity to add any
// information to the GPU cache, if appropriate.
task.write_gpu_blocks(gpu_cache);
(target_kind, texture_target)
};
match texture_target {
Some(texture_target) => {
let texture = texture_cache
.entry(texture_target)
.or_insert(
TextureCacheRenderTarget::new(target_kind)
);
texture.add_task(task_id, render_tasks);
}
None => {
match target_kind {
RenderTargetKind::Color => color.add_task(
task_id,
ctx,
gpu_cache,
render_tasks,
clip_store,
deferred_resolves,
),
RenderTargetKind::Alpha => alpha.add_task(
task_id,
ctx,
gpu_cache,
render_tasks,
clip_store,
deferred_resolves,
),
}
}
}
}
color.build(ctx, gpu_cache, render_tasks, deferred_resolves, saved_color);
alpha.build(ctx, gpu_cache, render_tasks, deferred_resolves, saved_alpha);
alpha.is_shared = is_shared_alpha;
}
}
}
}
#[derive(Debug, Clone, Default)]
pub struct CompositeOps {
// Requires only a single texture as input (e.g. most filters)
pub filters: Vec<FilterOp>,
// Requires two source textures (e.g. mix-blend-mode)
pub mix_blend_mode: Option<MixBlendMode>,
}
impl CompositeOps {
pub fn new(filters: Vec<FilterOp>, mix_blend_mode: Option<MixBlendMode>) -> Self {
CompositeOps {
filters,
mix_blend_mode,
}
}
pub fn count(&self) -> usize {
self.filters.len() + if self.mix_blend_mode.is_some() { 1 } else { 0 }
}
}
/// A rendering-oriented representation of the frame built by the render backend
/// and presented to the renderer.
#[cfg_attr(feature = "capture", derive(Serialize))]
#[cfg_attr(feature = "replay", derive(Deserialize))]
pub struct Frame {
//TODO: share the fields with DocumentView struct
pub window_size: DeviceUintSize,
pub inner_rect: DeviceUintRect,
pub background_color: Option<ColorF>,
pub layer: DocumentLayer,
pub device_pixel_ratio: f32,
pub passes: Vec<RenderPass>,
#[cfg_attr(any(feature = "capture", feature = "replay"), serde(default = "FrameProfileCounters::new", skip))]
pub profile_counters: FrameProfileCounters,
pub node_data: Vec<ClipScrollNodeData>,
pub clip_chain_local_clip_rects: Vec<LayoutRect>,
pub render_tasks: RenderTaskTree,
/// The GPU cache frame that the contents of Self depend on
pub gpu_cache_frame_id: FrameId,
/// List of textures that we don't know about yet
/// from the backend thread. The render thread
/// will use a callback to resolve these and
/// patch the data structures.
pub deferred_resolves: Vec<DeferredResolve>,
/// True if this frame contains any render tasks
/// that write to the texture cache.
pub has_texture_cache_tasks: bool,
/// True if this frame has been drawn by the
/// renderer.
pub has_been_rendered: bool,
}
impl Frame {
// This frame must be flushed if it writes to the
// texture cache, and hasn't been drawn yet.
pub fn must_be_drawn(&self) -> bool {
self.has_texture_cache_tasks && !self.has_been_rendered
}
}
impl BlurTask {
fn add_instances(
&self,
instances: &mut Vec<BlurInstance>,
blur_direction: BlurDirection,
task_address: RenderTaskAddress,
src_task_address: RenderTaskAddress,
) {
let instance = BlurInstance {
task_address,
src_task_address,