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

85 строки
2.7 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "Layers.h" // for ColorLayer, etc
#include "BasicImplData.h" // for BasicImplData
#include "BasicLayers.h" // for BasicLayerManager
#include "gfxContext.h" // for gfxContext, etc
#include "gfxRect.h" // for gfxRect
#include "gfx2DGlue.h"
#include "mozilla/mozalloc.h" // for operator new
#include "nsCOMPtr.h" // for already_AddRefed
#include "nsDebug.h" // for NS_ASSERTION
#include "nsISupportsImpl.h" // for Layer::AddRef, etc
#include "nsRect.h" // for mozilla::gfx::IntRect
#include "nsRegion.h" // for nsIntRegion
#include "mozilla/gfx/PathHelpers.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace layers {
class BasicBorderLayer : public BorderLayer, public BasicImplData {
public:
explicit BasicBorderLayer(BasicLayerManager* aLayerManager) :
BorderLayer(aLayerManager, static_cast<BasicImplData*>(this))
{
MOZ_COUNT_CTOR(BasicBorderLayer);
}
protected:
virtual ~BasicBorderLayer()
{
MOZ_COUNT_DTOR(BasicBorderLayer);
}
public:
virtual void SetVisibleRegion(const LayerIntRegion& aRegion) override
{
NS_ASSERTION(BasicManager()->InConstruction(),
"Can only set properties in construction phase");
BorderLayer::SetVisibleRegion(aRegion);
}
virtual void Paint(DrawTarget* aDT,
const gfx::Point& aDeviceOffset,
Layer* aMaskLayer) override
{
if (IsHidden()) {
return;
}
// We currently assume that we never have rounded corners,
// and that all borders have the same width and color.
ColorPattern color(mColors[0]);
StrokeOptions strokeOptions(mWidths[0]);
Rect rect = mRect.ToUnknownRect();
rect.Deflate(mWidths[0] / 2.0);
aDT->StrokeRect(rect, color, strokeOptions);
}
protected:
BasicLayerManager* BasicManager()
{
return static_cast<BasicLayerManager*>(mManager);
}
};
already_AddRefed<BorderLayer>
BasicLayerManager::CreateBorderLayer()
{
NS_ASSERTION(InConstruction(), "Only allowed in construction phase");
RefPtr<BorderLayer> layer = new BasicBorderLayer(this);
return layer.forget();
}
} // namespace layers
} // namespace mozilla