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
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/viz/service/display/overlay_strategy_single_on_top.h"
#include "components/viz/service/display/overlay_candidate_validator.h"
#include "ui/gfx/buffer_types.h"
#include "ui/gfx/geometry/rect_conversions.h"
namespace viz {
OverlayStrategySingleOnTop::OverlayStrategySingleOnTop(
OverlayCandidateValidator* capability_checker)
: capability_checker_(capability_checker) {
DCHECK(capability_checker);
}
OverlayStrategySingleOnTop::~OverlayStrategySingleOnTop() {}
bool OverlayStrategySingleOnTop::Attempt(
const SkMatrix44& output_color_matrix,
cc::DisplayResourceProvider* resource_provider,
RenderPass* render_pass,
cc::OverlayCandidateList* candidate_list,
std::vector<gfx::Rect>* content_bounds) {
QuadList* quad_list = &render_pass->quad_list;
// Build a list of candidates with the associated quad.
cc::OverlayCandidate best_candidate;
auto best_quad_it = quad_list->end();
for (auto it = quad_list->begin(); it != quad_list->end(); ++it) {
cc::OverlayCandidate candidate;
if (cc::OverlayCandidate::FromDrawQuad(
resource_provider, output_color_matrix, *it, &candidate) &&
!cc::OverlayCandidate::IsOccluded(candidate, quad_list->cbegin(), it)) {
if (candidate.display_rect.size().GetArea() >
best_candidate.display_rect.size().GetArea()) {
best_candidate = candidate;
best_quad_it = it;
}
}
}
if (best_quad_it == quad_list->end())
return false;
if (TryOverlay(quad_list, candidate_list, best_candidate, best_quad_it))
return true;
return false;
}
bool OverlayStrategySingleOnTop::TryOverlay(
QuadList* quad_list,
cc::OverlayCandidateList* candidate_list,
const cc::OverlayCandidate& candidate,
QuadList::Iterator candidate_iterator) {
// Add the overlay.
cc::OverlayCandidateList new_candidate_list = *candidate_list;
new_candidate_list.push_back(candidate);
new_candidate_list.back().plane_z_order = 1;
// Check for support.
capability_checker_->CheckOverlaySupport(&new_candidate_list);
const cc::OverlayCandidate& overlay_candidate = new_candidate_list.back();
// If the candidate can be handled by an overlay, create a pass for it.
if (overlay_candidate.overlay_handled) {
quad_list->EraseAndInvalidateAllPointers(candidate_iterator);
candidate_list->swap(new_candidate_list);
return true;
}
return false;
}
} // namespace viz
|
