gecko-dev/gfx/layers/basic/BasicImageLayer.cpp

162 lines
4.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; 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 "BasicLayersImpl.h" // for FillRectWithMask, etc
#include "ImageContainer.h" // for AutoLockImage, etc
#include "ImageLayers.h" // for ImageLayer
#include "Layers.h" // for Layer (ptr only), etc
#include "basic/BasicImplData.h" // for BasicImplData
#include "basic/BasicLayers.h" // for BasicLayerManager
#include "mozilla/mozalloc.h" // for operator new
#include "nsAutoPtr.h" // for nsRefPtr, getter_AddRefs, etc
#include "nsCOMPtr.h" // for already_AddRefed
#include "nsDebug.h" // for NS_ASSERTION
#include "nsISupportsImpl.h" // for gfxPattern::Release, etc
#include "nsRect.h" // for nsIntRect
#include "nsRegion.h" // for nsIntRegion
#include "mozilla/gfx/Point.h" // for IntSize
using namespace mozilla::gfx;
namespace mozilla {
namespace layers {
class BasicImageLayer : public ImageLayer, public BasicImplData {
public:
BasicImageLayer(BasicLayerManager* aLayerManager) :
ImageLayer(aLayerManager,
static_cast<BasicImplData*>(MOZ_THIS_IN_INITIALIZER_LIST())),
mSize(-1, -1)
{
MOZ_COUNT_CTOR(BasicImageLayer);
}
protected:
virtual ~BasicImageLayer()
{
MOZ_COUNT_DTOR(BasicImageLayer);
}
public:
virtual void SetVisibleRegion(const nsIntRegion& aRegion)
{
NS_ASSERTION(BasicManager()->InConstruction(),
"Can only set properties in construction phase");
ImageLayer::SetVisibleRegion(aRegion);
}
virtual void Paint(DrawTarget* aDT,
const gfx::Point& aDeviceOffset,
Layer* aMaskLayer) MOZ_OVERRIDE;
virtual TemporaryRef<SourceSurface> GetAsSourceSurface() MOZ_OVERRIDE;
protected:
BasicLayerManager* BasicManager()
{
return static_cast<BasicLayerManager*>(mManager);
}
// only paints the image if aContext is non-null
void
GetAndPaintCurrentImage(DrawTarget* aTarget,
float aOpacity,
SourceSurface* aMaskSurface);
gfx::IntSize mSize;
};
void
BasicImageLayer::Paint(DrawTarget* aDT,
const gfx::Point& aDeviceOffset,
Layer* aMaskLayer)
{
if (IsHidden() || !mContainer) {
return;
}
nsRefPtr<ImageFactory> originalIF = mContainer->GetImageFactory();
mContainer->SetImageFactory(mManager->IsCompositingCheap() ? nullptr : BasicManager()->GetImageFactory());
RefPtr<gfx::SourceSurface> surface;
AutoLockImage autoLock(mContainer, &surface);
Image *image = autoLock.GetImage();
gfx::IntSize size = mSize = autoLock.GetSize();
if (!surface || !surface->IsValid()) {
mContainer->SetImageFactory(originalIF);
return;
}
FillRectWithMask(aDT, aDeviceOffset, Rect(0, 0, size.width, size.height),
surface, ToFilter(mFilter),
DrawOptions(GetEffectiveOpacity(), GetEffectiveOperator(this)),
aMaskLayer);
mContainer->SetImageFactory(originalIF);
GetContainer()->NotifyPaintedImage(image);
}
void
BasicImageLayer::GetAndPaintCurrentImage(DrawTarget* aTarget,
float aOpacity,
SourceSurface* aMaskSurface)
{
if (!mContainer) {
return;
}
nsRefPtr<ImageFactory> originalIF = mContainer->GetImageFactory();
mContainer->SetImageFactory(mManager->IsCompositingCheap() ?
nullptr :
BasicManager()->GetImageFactory());
IntSize size;
Image* image = nullptr;
RefPtr<SourceSurface> surf =
mContainer->LockCurrentAsSourceSurface(&size, &image);
if (!surf) {
mContainer->SetImageFactory(originalIF);
return;
}
if (aTarget) {
// The visible region can extend outside the image, so just draw
// within the image bounds.
SurfacePattern pat(surf, ExtendMode::CLAMP, Matrix(), ToFilter(mFilter));
CompositionOp op = GetEffectiveOperator(this);
DrawOptions opts(aOpacity, op);
aTarget->MaskSurface(pat, aMaskSurface, Point(0, 0), opts);
GetContainer()->NotifyPaintedImage(image);
}
mContainer->SetImageFactory(originalIF);
mContainer->UnlockCurrentImage();
}
TemporaryRef<SourceSurface>
BasicImageLayer::GetAsSourceSurface()
{
if (!mContainer) {
return nullptr;
}
gfx::IntSize dontCare;
return mContainer->GetCurrentAsSourceSurface(&dontCare);
}
already_AddRefed<ImageLayer>
BasicLayerManager::CreateImageLayer()
{
NS_ASSERTION(InConstruction(), "Only allowed in construction phase");
nsRefPtr<ImageLayer> layer = new BasicImageLayer(this);
return layer.forget();
}
}
}