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comparison: gfx/layers/basic/BasicImageLayer.cpp
gfx/layers/basic/BasicImageLayer.cpp
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "BasicLayersImpl.h" // for FillRectWithMask, etc | |
| 7 #include "ImageContainer.h" // for AutoLockImage, etc | |
| 8 #include "ImageLayers.h" // for ImageLayer | |
| 9 #include "Layers.h" // for Layer (ptr only), etc | |
| 10 #include "basic/BasicImplData.h" // for BasicImplData | |
| 11 #include "basic/BasicLayers.h" // for BasicLayerManager | |
| 12 #include "mozilla/mozalloc.h" // for operator new | |
| 13 #include "nsAutoPtr.h" // for nsRefPtr, getter_AddRefs, etc | |
| 14 #include "nsCOMPtr.h" // for already_AddRefed | |
| 15 #include "nsDebug.h" // for NS_ASSERTION | |
| 16 #include "nsISupportsImpl.h" // for gfxPattern::Release, etc | |
| 17 #include "nsRect.h" // for nsIntRect | |
| 18 #include "nsRegion.h" // for nsIntRegion | |
| 19 #include "mozilla/gfx/Point.h" // for IntSize | |
| 20 | |
| 21 using namespace mozilla::gfx; | |
| 22 | |
| 23 namespace mozilla { | |
| 24 namespace layers { | |
| 25 | |
| 26 class BasicImageLayer : public ImageLayer, public BasicImplData { | |
| 27 public: | |
| 28 BasicImageLayer(BasicLayerManager* aLayerManager) : | |
| 29 ImageLayer(aLayerManager, | |
| 30 static_cast<BasicImplData*>(MOZ_THIS_IN_INITIALIZER_LIST())), | |
| 31 mSize(-1, -1) | |
| 32 { | |
| 33 MOZ_COUNT_CTOR(BasicImageLayer); | |
| 34 } | |
| 35 virtual ~BasicImageLayer() | |
| 36 { | |
| 37 MOZ_COUNT_DTOR(BasicImageLayer); | |
| 38 } | |
| 39 | |
| 40 virtual void SetVisibleRegion(const nsIntRegion& aRegion) | |
| 41 { | |
| 42 NS_ASSERTION(BasicManager()->InConstruction(), | |
| 43 "Can only set properties in construction phase"); | |
| 44 ImageLayer::SetVisibleRegion(aRegion); | |
| 45 } | |
| 46 | |
| 47 virtual void Paint(DrawTarget* aDT, | |
| 48 const gfx::Point& aDeviceOffset, | |
| 49 Layer* aMaskLayer) MOZ_OVERRIDE; | |
| 50 | |
| 51 virtual TemporaryRef<SourceSurface> GetAsSourceSurface() MOZ_OVERRIDE; | |
| 52 | |
| 53 protected: | |
| 54 BasicLayerManager* BasicManager() | |
| 55 { | |
| 56 return static_cast<BasicLayerManager*>(mManager); | |
| 57 } | |
| 58 | |
| 59 // only paints the image if aContext is non-null | |
| 60 void | |
| 61 GetAndPaintCurrentImage(DrawTarget* aTarget, | |
| 62 float aOpacity, | |
| 63 SourceSurface* aMaskSurface); | |
| 64 | |
| 65 gfx::IntSize mSize; | |
| 66 }; | |
| 67 | |
| 68 void | |
| 69 BasicImageLayer::Paint(DrawTarget* aDT, | |
| 70 const gfx::Point& aDeviceOffset, | |
| 71 Layer* aMaskLayer) | |
| 72 { | |
| 73 if (IsHidden() || !mContainer) { | |
| 74 return; | |
| 75 } | |
| 76 | |
| 77 mContainer->SetImageFactory(mManager->IsCompositingCheap() ? nullptr : BasicManager()->GetImageFactory()); | |
| 78 | |
| 79 RefPtr<gfx::SourceSurface> surface; | |
| 80 AutoLockImage autoLock(mContainer, &surface); | |
| 81 Image *image = autoLock.GetImage(); | |
| 82 gfx::IntSize size = mSize = autoLock.GetSize(); | |
| 83 | |
| 84 if (!surface || !surface->IsValid()) { | |
| 85 return; | |
| 86 } | |
| 87 | |
| 88 FillRectWithMask(aDT, aDeviceOffset, Rect(0, 0, size.width, size.height), | |
| 89 surface, ToFilter(mFilter), | |
| 90 DrawOptions(GetEffectiveOpacity(), GetEffectiveOperator(this)), | |
| 91 aMaskLayer); | |
| 92 | |
| 93 GetContainer()->NotifyPaintedImage(image); | |
| 94 } | |
| 95 | |
| 96 void | |
| 97 BasicImageLayer::GetAndPaintCurrentImage(DrawTarget* aTarget, | |
| 98 float aOpacity, | |
| 99 SourceSurface* aMaskSurface) | |
| 100 { | |
| 101 if (!mContainer) { | |
| 102 return; | |
| 103 } | |
| 104 | |
| 105 mContainer->SetImageFactory(mManager->IsCompositingCheap() ? | |
| 106 nullptr : | |
| 107 BasicManager()->GetImageFactory()); | |
| 108 IntSize size; | |
| 109 Image* image = nullptr; | |
| 110 RefPtr<SourceSurface> surf = | |
| 111 mContainer->LockCurrentAsSourceSurface(&size, &image); | |
| 112 | |
| 113 if (!surf) { | |
| 114 return; | |
| 115 } | |
| 116 | |
| 117 if (aTarget) { | |
| 118 // The visible region can extend outside the image, so just draw | |
| 119 // within the image bounds. | |
| 120 SurfacePattern pat(surf, ExtendMode::CLAMP, Matrix(), ToFilter(mFilter)); | |
| 121 CompositionOp op = GetEffectiveOperator(this); | |
| 122 DrawOptions opts(aOpacity, op); | |
| 123 | |
| 124 aTarget->MaskSurface(pat, aMaskSurface, Point(0, 0), opts); | |
| 125 | |
| 126 GetContainer()->NotifyPaintedImage(image); | |
| 127 } | |
| 128 | |
| 129 mContainer->UnlockCurrentImage(); | |
| 130 } | |
| 131 | |
| 132 TemporaryRef<SourceSurface> | |
| 133 BasicImageLayer::GetAsSourceSurface() | |
| 134 { | |
| 135 if (!mContainer) { | |
| 136 return nullptr; | |
| 137 } | |
| 138 | |
| 139 gfx::IntSize dontCare; | |
| 140 return mContainer->GetCurrentAsSourceSurface(&dontCare); | |
| 141 } | |
| 142 | |
| 143 already_AddRefed<ImageLayer> | |
| 144 BasicLayerManager::CreateImageLayer() | |
| 145 { | |
| 146 NS_ASSERTION(InConstruction(), "Only allowed in construction phase"); | |
| 147 nsRefPtr<ImageLayer> layer = new BasicImageLayer(this); | |
| 148 return layer.forget(); | |
| 149 } | |
| 150 | |
| 151 } | |
| 152 } |
