1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "CanvasLayerComposite.h"
8 #include "composite/CompositableHost.h" // for CompositableHost
9 #include "gfx2DGlue.h" // for ToFilter
10 #include "gfxEnv.h" // for gfxEnv, etc
11 #include "mozilla/gfx/Matrix.h" // for Matrix4x4
12 #include "mozilla/gfx/Point.h" // for Point
13 #include "mozilla/gfx/Rect.h" // for Rect
14 #include "mozilla/layers/Compositor.h" // for Compositor
15 #include "mozilla/layers/Effects.h" // for EffectChain
16 #include "mozilla/mozalloc.h" // for operator delete
17 #include "nsAString.h"
18 #include "mozilla/RefPtr.h" // for nsRefPtr
19 #include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
20 #include "nsString.h" // for nsAutoCString
21
22 namespace mozilla {
23 namespace layers {
24
25 using namespace mozilla::gfx;
26
CanvasLayerComposite(LayerManagerComposite * aManager)27 CanvasLayerComposite::CanvasLayerComposite(LayerManagerComposite* aManager)
28 : CanvasLayer(aManager, nullptr),
29 LayerComposite(aManager),
30 mCompositableHost(nullptr) {
31 MOZ_COUNT_CTOR(CanvasLayerComposite);
32 mImplData = static_cast<LayerComposite*>(this);
33 }
34
~CanvasLayerComposite()35 CanvasLayerComposite::~CanvasLayerComposite() {
36 MOZ_COUNT_DTOR(CanvasLayerComposite);
37
38 CleanupResources();
39 }
40
SetCompositableHost(CompositableHost * aHost)41 bool CanvasLayerComposite::SetCompositableHost(CompositableHost* aHost) {
42 switch (aHost->GetType()) {
43 case CompositableType::IMAGE: {
44 if (mCompositableHost && aHost != mCompositableHost) {
45 mCompositableHost->Detach(this);
46 }
47 mCompositableHost = aHost;
48 return true;
49 }
50 default:
51 return false;
52 }
53 }
54
GetLayer()55 Layer* CanvasLayerComposite::GetLayer() { return this; }
56
SetLayerManager(HostLayerManager * aManager)57 void CanvasLayerComposite::SetLayerManager(HostLayerManager* aManager) {
58 LayerComposite::SetLayerManager(aManager);
59 mManager = aManager;
60 if (mCompositableHost && mCompositor) {
61 mCompositableHost->SetTextureSourceProvider(mCompositor);
62 }
63 }
64
RenderLayer(const IntRect & aClipRect,const Maybe<gfx::Polygon> & aGeometry)65 void CanvasLayerComposite::RenderLayer(const IntRect& aClipRect,
66 const Maybe<gfx::Polygon>& aGeometry) {
67 if (!mCompositableHost || !mCompositableHost->IsAttached()) {
68 return;
69 }
70
71 mCompositor->MakeCurrent();
72
73 #ifdef MOZ_DUMP_PAINTING
74 if (gfxEnv::DumpCompositorTextures()) {
75 RefPtr<gfx::DataSourceSurface> surf = mCompositableHost->GetAsSurface();
76 if (surf) {
77 WriteSnapshotToDumpFile(this, surf);
78 }
79 }
80 #endif
81
82 RenderWithAllMasks(this, mCompositor, aClipRect,
83 [&](EffectChain& effectChain, const IntRect& clipRect) {
84 mCompositableHost->Composite(
85 mCompositor, this, effectChain,
86 GetEffectiveOpacity(), GetEffectiveTransform(),
87 GetSamplingFilter(), clipRect);
88 });
89
90 mCompositableHost->BumpFlashCounter();
91 }
92
GetCompositableHost()93 CompositableHost* CanvasLayerComposite::GetCompositableHost() {
94 if (mCompositableHost && mCompositableHost->IsAttached()) {
95 return mCompositableHost.get();
96 }
97
98 return nullptr;
99 }
100
CleanupResources()101 void CanvasLayerComposite::CleanupResources() {
102 if (mCompositableHost) {
103 mCompositableHost->Detach(this);
104 }
105 mCompositableHost = nullptr;
106 }
107
GetSamplingFilter()108 gfx::SamplingFilter CanvasLayerComposite::GetSamplingFilter() {
109 gfx::SamplingFilter filter = mSamplingFilter;
110 #ifdef ANDROID
111 // Bug 691354
112 // Using the LINEAR filter we get unexplained artifacts.
113 // Use NEAREST when no scaling is required.
114 Matrix matrix;
115 bool is2D = GetEffectiveTransform().Is2D(&matrix);
116 if (is2D && !ThebesMatrix(matrix).HasNonTranslationOrFlip()) {
117 filter = SamplingFilter::POINT;
118 }
119 #endif
120 return filter;
121 }
122
GenEffectChain(EffectChain & aEffect)123 void CanvasLayerComposite::GenEffectChain(EffectChain& aEffect) {
124 aEffect.mLayerRef = this;
125 aEffect.mPrimaryEffect = mCompositableHost->GenEffect(GetSamplingFilter());
126 }
127
PrintInfo(std::stringstream & aStream,const char * aPrefix)128 void CanvasLayerComposite::PrintInfo(std::stringstream& aStream,
129 const char* aPrefix) {
130 CanvasLayer::PrintInfo(aStream, aPrefix);
131 aStream << "\n";
132 if (mCompositableHost && mCompositableHost->IsAttached()) {
133 nsAutoCString pfx(aPrefix);
134 pfx += " ";
135 mCompositableHost->PrintInfo(aStream, pfx.get());
136 }
137 }
138
139 } // namespace layers
140 } // namespace mozilla
141