gecko-dev/gfx/public/nsDeviceContext.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsDeviceContext_h___
#define nsDeviceContext_h___
#include "nsIDeviceContext.h"
#include "nsIDeviceContextSpec.h"
#include "libimg.h"
class nsIImageRequest;
class nsHashtable;
class nsFontCache;
class DeviceContextImpl : public nsIDeviceContext
{
public:
DeviceContextImpl();
NS_DECL_ISUPPORTS
NS_IMETHOD Init(nsNativeWidget aWidget);
NS_IMETHOD CreateRenderingContext(nsIView *aView, nsIRenderingContext *&aContext);
NS_IMETHOD CreateRenderingContext(nsIWidget *aWidget, nsIRenderingContext *&aContext);
NS_IMETHOD InitRenderingContext(nsIRenderingContext *aContext, nsIWidget *aWindow);
NS_IMETHOD GetDevUnitsToTwips(float &aDevUnitsToTwips) const;
NS_IMETHOD GetTwipsToDevUnits(float &aTwipsToDevUnits) const;
NS_IMETHOD SetAppUnitsToDevUnits(float aAppUnits);
NS_IMETHOD SetDevUnitsToAppUnits(float aDevUnits);
NS_IMETHOD GetAppUnitsToDevUnits(float &aAppUnits) const;
NS_IMETHOD GetDevUnitsToAppUnits(float &aDevUnits) const;
NS_IMETHOD GetCanonicalPixelScale(float &aScale) const;
NS_IMETHOD GetMetricsFor(const nsFont& aFont, nsIFontMetrics*& aMetrics);
NS_IMETHOD SetZoom(float aZoom);
NS_IMETHOD GetZoom(float &aZoom) const;
NS_IMETHOD GetGamma(float &aGamma);
NS_IMETHOD SetGamma(float aGamma);
NS_IMETHOD GetGammaTable(PRUint8 *&aGammaTable);
NS_IMETHOD LoadIconImage(PRInt32 aId, nsIImage*& aImage);
NS_IMETHOD FirstExistingFont(const nsFont& aFont, nsString& aFaceName);
NS_IMETHOD GetLocalFontName(const nsString& aFaceName, nsString& aLocalName,
PRBool& aAliased);
NS_IMETHOD FlushFontCache(void);
NS_IMETHOD GetDepth(PRUint32& aDepth);
NS_IMETHOD GetILColorSpace(IL_ColorSpace*& aColorSpace);
NS_IMETHOD GetPaletteInfo(nsPaletteInfo&);
protected:
virtual ~DeviceContextImpl();
void CommonInit(void);
nsresult CreateFontCache();
void SetGammaTable(PRUint8 * aTable, float aCurrentGamma, float aNewGamma);
nsresult CreateIconILGroupContext();
virtual nsresult CreateFontAliasTable();
nsresult AliasFont(const nsString& aFont,
const nsString& aAlias, const nsString& aAltAlias,
PRBool aForceAlias);
float mTwipsToPixels;
float mPixelsToTwips;
float mAppUnitsToDevUnits;
float mDevUnitsToAppUnits;
nsFontCache *mFontCache;
float mZoom;
float mGammaValue;
PRUint8 *mGammaTable;
IL_GroupContext* mIconImageGroup;
nsIImageRequest* mIcons[NS_NUMBER_OF_ICONS];
nsHashtable* mFontAliasTable;
IL_ColorSpace* mColorSpace;
public:
nsNativeWidget mWidget;
};
#endif /* nsDeviceContext_h___ */