The Tor Browser: gfx/layers/basic/BasicImageLayer.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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/. */

     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

    21 using namespace mozilla::gfx;

    23 namespace mozilla {

    24 namespace layers {

    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   }

    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   }

    47   virtual void Paint(DrawTarget* aDT,

    48                      const gfx::Point& aDeviceOffset,

    49                      Layer* aMaskLayer) MOZ_OVERRIDE;

    51   virtual TemporaryRef<SourceSurface> GetAsSourceSurface() MOZ_OVERRIDE;

    53 protected:

    54   BasicLayerManager* BasicManager()

    55   {

    56     return static_cast<BasicLayerManager*>(mManager);

    57   }

    59   // only paints the image if aContext is non-null

    60   void

    61   GetAndPaintCurrentImage(DrawTarget* aTarget,

    62                           float aOpacity,

    63                           SourceSurface* aMaskSurface);

    65   gfx::IntSize mSize;

    66 };

    68 void

    69 BasicImageLayer::Paint(DrawTarget* aDT,

    70                        const gfx::Point& aDeviceOffset,

    71                        Layer* aMaskLayer)

    72 {

    73   if (IsHidden() || !mContainer) {

    74     return;

    75   }

    77   mContainer->SetImageFactory(mManager->IsCompositingCheap() ? nullptr : BasicManager()->GetImageFactory());

    79   RefPtr<gfx::SourceSurface> surface;

    80   AutoLockImage autoLock(mContainer, &surface);

    81   Image *image = autoLock.GetImage();

    82   gfx::IntSize size = mSize = autoLock.GetSize();

    84   if (!surface || !surface->IsValid()) {

    85     return;

    86   }

    88   FillRectWithMask(aDT, aDeviceOffset, Rect(0, 0, size.width, size.height),

    89                    surface, ToFilter(mFilter),

    90                    DrawOptions(GetEffectiveOpacity(), GetEffectiveOperator(this)),

    91                    aMaskLayer);

    93   GetContainer()->NotifyPaintedImage(image);

    94 }

    96 void

    97 BasicImageLayer::GetAndPaintCurrentImage(DrawTarget* aTarget,

    98                                          float aOpacity,

    99                                          SourceSurface* aMaskSurface)

   100 {

   101   if (!mContainer) {

   102     return;

   103   }

   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);

   113   if (!surf) {

   114     return;

   115   }

   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);

   124     aTarget->MaskSurface(pat, aMaskSurface, Point(0, 0), opts);

   126     GetContainer()->NotifyPaintedImage(image);

   127   }

   129   mContainer->UnlockCurrentImage();

   130 }

   132 TemporaryRef<SourceSurface>

   133 BasicImageLayer::GetAsSourceSurface()

   134 {

   135   if (!mContainer) {

   136     return nullptr;

   137   }

   139   gfx::IntSize dontCare;

   140   return mContainer->GetCurrentAsSourceSurface(&dontCare);

   141 }

   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 }

   151 }

   152 }

The Tor Browser / file revision