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
|
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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/. */
#include "ReadbackProcessor.h"
#include <sys/types.h> // for int32_t
#include "Layers.h" // for Layer, PaintedLayer, etc
#include "ReadbackLayer.h" // for ReadbackLayer, ReadbackSink
#include "UnitTransforms.h" // for ViewAs
#include "Units.h" // for ParentLayerIntRect
#include "gfxContext.h" // for gfxContext
#include "gfxUtils.h"
#include "gfxRect.h" // for gfxRect
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/BasePoint.h" // for BasePoint
#include "mozilla/gfx/BaseRect.h" // for BaseRect
#include "mozilla/gfx/Point.h" // for Intsize
#include "nsDebug.h" // for NS_ASSERTION
#include "nsISupportsImpl.h" // for gfxContext::Release, etc
#include "nsPoint.h" // for nsIntPoint
#include "nsRegion.h" // for nsIntRegion
using namespace mozilla::gfx;
namespace mozilla {
namespace layers {
void
ReadbackProcessor::BuildUpdates(ContainerLayer* aContainer)
{
NS_ASSERTION(mAllUpdates.IsEmpty(), "Some updates not processed?");
if (!aContainer->mMayHaveReadbackChild)
return;
aContainer->mMayHaveReadbackChild = false;
// go backwards so the updates read from earlier layers are later in the
// array.
for (Layer* l = aContainer->GetLastChild(); l; l = l->GetPrevSibling()) {
if (l->GetType() == Layer::TYPE_READBACK) {
aContainer->mMayHaveReadbackChild = true;
BuildUpdatesForLayer(static_cast<ReadbackLayer*>(l));
}
}
}
static Layer*
FindBackgroundLayer(ReadbackLayer* aLayer, nsIntPoint* aOffset)
{
gfx::Matrix transform;
if (!aLayer->GetTransform().Is2D(&transform) ||
transform.HasNonIntegerTranslation())
return nullptr;
nsIntPoint transformOffset(int32_t(transform._31), int32_t(transform._32));
for (Layer* l = aLayer->GetPrevSibling(); l; l = l->GetPrevSibling()) {
gfx::Matrix backgroundTransform;
if (!l->GetTransform().Is2D(&backgroundTransform) ||
gfx::ThebesMatrix(backgroundTransform).HasNonIntegerTranslation())
return nullptr;
nsIntPoint backgroundOffset(int32_t(backgroundTransform._31), int32_t(backgroundTransform._32));
IntRect rectInBackground(transformOffset - backgroundOffset, aLayer->GetSize());
const nsIntRegion visibleRegion = l->GetLocalVisibleRegion().ToUnknownRegion();
if (!visibleRegion.Intersects(rectInBackground))
continue;
// Since l is present in the background, from here on we either choose l
// or nothing.
if (!visibleRegion.Contains(rectInBackground))
return nullptr;
if (l->GetEffectiveOpacity() != 1.0 ||
l->HasMaskLayers() ||
!(l->GetContentFlags() & Layer::CONTENT_OPAQUE))
{
return nullptr;
}
// cliprects are post-transform
const Maybe<ParentLayerIntRect>& clipRect = l->GetLocalClipRect();
if (clipRect && !clipRect->Contains(ViewAs<ParentLayerPixel>(IntRect(transformOffset, aLayer->GetSize()))))
return nullptr;
Layer::LayerType type = l->GetType();
if (type != Layer::TYPE_COLOR && type != Layer::TYPE_PAINTED)
return nullptr;
*aOffset = backgroundOffset - transformOffset;
return l;
}
return nullptr;
}
void
ReadbackProcessor::BuildUpdatesForLayer(ReadbackLayer* aLayer)
{
if (!aLayer->mSink)
return;
nsIntPoint offset;
Layer* newBackground = FindBackgroundLayer(aLayer, &offset);
if (!newBackground) {
aLayer->SetUnknown();
return;
}
if (newBackground->GetType() == Layer::TYPE_COLOR) {
ColorLayer* colorLayer = static_cast<ColorLayer*>(newBackground);
if (aLayer->mBackgroundColor != colorLayer->GetColor()) {
aLayer->mBackgroundLayer = nullptr;
aLayer->mBackgroundColor = colorLayer->GetColor();
NS_ASSERTION(aLayer->mBackgroundColor.a == 1.f,
"Color layer said it was opaque!");
RefPtr<DrawTarget> dt =
aLayer->mSink->BeginUpdate(aLayer->GetRect(),
aLayer->AllocateSequenceNumber());
if (dt) {
ColorPattern color(ToDeviceColor(aLayer->mBackgroundColor));
IntSize size = aLayer->GetSize();
dt->FillRect(Rect(0, 0, size.width, size.height), color);
aLayer->mSink->EndUpdate(aLayer->GetRect());
}
}
} else {
NS_ASSERTION(newBackground->AsPaintedLayer(), "Must be PaintedLayer");
PaintedLayer* paintedLayer = static_cast<PaintedLayer*>(newBackground);
// updateRect is relative to the PaintedLayer
IntRect updateRect = aLayer->GetRect() - offset;
if (paintedLayer != aLayer->mBackgroundLayer ||
offset != aLayer->mBackgroundLayerOffset) {
aLayer->mBackgroundLayer = paintedLayer;
aLayer->mBackgroundLayerOffset = offset;
aLayer->mBackgroundColor = Color();
paintedLayer->SetUsedForReadback(true);
} else {
nsIntRegion invalid;
invalid.Sub(updateRect, paintedLayer->GetValidRegion());
updateRect = invalid.GetBounds();
}
Update update = { aLayer, updateRect, aLayer->AllocateSequenceNumber() };
mAllUpdates.AppendElement(update);
}
}
void
ReadbackProcessor::GetPaintedLayerUpdates(PaintedLayer* aLayer,
nsTArray<Update>* aUpdates,
nsIntRegion* aUpdateRegion)
{
// All PaintedLayers used for readback are in mAllUpdates (some possibly
// with an empty update rect).
aLayer->SetUsedForReadback(false);
if (aUpdateRegion) {
aUpdateRegion->SetEmpty();
}
for (uint32_t i = mAllUpdates.Length(); i > 0; --i) {
const Update& update = mAllUpdates[i - 1];
if (update.mLayer->mBackgroundLayer == aLayer) {
aLayer->SetUsedForReadback(true);
// Don't bother asking for updates if we have an empty update rect.
if (!update.mUpdateRect.IsEmpty()) {
aUpdates->AppendElement(update);
if (aUpdateRegion) {
aUpdateRegion->Or(*aUpdateRegion, update.mUpdateRect);
}
}
mAllUpdates.RemoveElementAt(i - 1);
}
}
}
ReadbackProcessor::~ReadbackProcessor()
{
for (uint32_t i = mAllUpdates.Length(); i > 0; --i) {
const Update& update = mAllUpdates[i - 1];
// Unprocessed update. Notify the readback sink that this content is
// unknown.
update.mLayer->SetUnknown();
}
}
} // namespace layers
} // namespace mozilla
|
