gecko/gfx/layers/ImageLayers.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2012-05-21 04:12:37 -07:00
* 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/. */
#ifndef GFX_IMAGELAYER_H
#define GFX_IMAGELAYER_H
#include "Layers.h"
#include "ImageTypes.h"
#include "nsISupportsImpl.h"
#include "gfxPattern.h"
namespace mozilla {
namespace layers {
class ImageContainer;
/**
* A Layer which renders an Image.
*/
class THEBES_API ImageLayer : public Layer {
public:
enum ScaleMode {
SCALE_NONE,
SCALE_STRETCH
// Unimplemented - SCALE_PRESERVE_ASPECT_RATIO_CONTAIN
};
/**
* CONSTRUCTION PHASE ONLY
* Set the ImageContainer. aContainer must have the same layer manager
* as this layer.
*/
void SetContainer(ImageContainer* aContainer);
/**
* CONSTRUCTION PHASE ONLY
* Set the filter used to resample this image if necessary.
*/
void SetFilter(gfxPattern::GraphicsFilter aFilter) { mFilter = aFilter; }
/**
* CONSTRUCTION PHASE ONLY
* Set the size to scale the image to and the mode at which to scale.
*/
void SetScaleToSize(const gfxIntSize &aSize, ScaleMode aMode)
{
mScaleToSize = aSize;
mScaleMode = aMode;
}
ImageContainer* GetContainer() { return mContainer; }
gfxPattern::GraphicsFilter GetFilter() { return mFilter; }
const gfxIntSize& GetScaleToSize() { return mScaleToSize; }
ScaleMode GetScaleMode() { return mScaleMode; }
MOZ_LAYER_DECL_NAME("ImageLayer", TYPE_IMAGE)
virtual void ComputeEffectiveTransforms(const gfx3DMatrix& aTransformToSurface);
/**
* if true, the image will only be backed by a single tile texture
*/
void SetForceSingleTile(bool aForceSingleTile)
{
mForceSingleTile = aForceSingleTile;
Mutated();
}
protected:
ImageLayer(LayerManager* aManager, void* aImplData);
~ImageLayer();
virtual nsACString& PrintInfo(nsACString& aTo, const char* aPrefix);
nsRefPtr<ImageContainer> mContainer;
gfxPattern::GraphicsFilter mFilter;
gfxIntSize mScaleToSize;
ScaleMode mScaleMode;
bool mForceSingleTile;
};
}
}
#endif /* GFX_IMAGELAYER_H */