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 * The Original Code is mozilla.org code.
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 *
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#ifndef nsRenderingContextBeOS_h___
#define nsRenderingContextBeOS_h___

#include "nsRenderingContextImpl.h"
#include "nsUnitConversion.h"
#include "nsFont.h"
#include "nsIFontMetrics.h"
#include "nsPoint.h"
#include "nsString.h"
#include "nsCRT.h"
#include "nsTransform2D.h"
#include "nsIWidget.h"
#include "nsRect.h"
#include "nsIImage.h"
#include "nsIDeviceContext.h"
#include "nsVoidArray.h"
#include "nsGfxCIID.h"
#include "nsDrawingSurfaceBeOS.h"
#include "nsRegionBeOS.h"

#define USE_NATIVE_TILING 1

class nsRenderingContextBeOS : public nsRenderingContextImpl
{
public:
  nsRenderingContextBeOS();
  virtual ~nsRenderingContextBeOS();

  NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW

  NS_DECL_ISUPPORTS

  NS_IMETHOD Init(nsIDeviceContext* aContext, nsIWidget *aWindow);
  NS_IMETHOD Init(nsIDeviceContext* aContext, nsDrawingSurface aSurface);

  NS_IMETHOD Reset(void);

  NS_IMETHOD GetDeviceContext(nsIDeviceContext *&aContext);

  NS_IMETHOD LockDrawingSurface(PRInt32 aX, PRInt32 aY, PRUint32 aWidth, PRUint32 aHeight,
                                void **aBits, PRInt32 *aStride, PRInt32 *aWidthBytes,
                                PRUint32 aFlags);
  NS_IMETHOD UnlockDrawingSurface(void);

  NS_IMETHOD SelectOffScreenDrawingSurface(nsDrawingSurface aSurface);
  NS_IMETHOD GetDrawingSurface(nsDrawingSurface *aSurface);
  NS_IMETHOD GetHints(PRUint32& aResult);

  NS_IMETHOD PushState(void);
  NS_IMETHOD PopState(PRBool &aClipEmpty);

  NS_IMETHOD IsVisibleRect(const nsRect& aRect, PRBool &aVisible);

  NS_IMETHOD SetClipRect(const nsRect& aRect, nsClipCombine aCombine, PRBool &aClipEmpty);
  NS_IMETHOD GetClipRect(nsRect &aRect, PRBool &aClipValid);
  NS_IMETHOD SetClipRegion(const nsIRegion& aRegion, nsClipCombine aCombine, PRBool &aClipEmpty);
  NS_IMETHOD CopyClipRegion(nsIRegion &aRegion);
  NS_IMETHOD GetClipRegion(nsIRegion **aRegion);

  NS_IMETHOD SetLineStyle(nsLineStyle aLineStyle);
  NS_IMETHOD GetLineStyle(nsLineStyle &aLineStyle);

  NS_IMETHOD SetColor(nscolor aColor);
  NS_IMETHOD GetColor(nscolor &aColor) const;

  NS_IMETHOD SetFont(const nsFont& aFont);
  NS_IMETHOD SetFont(nsIFontMetrics *aFontMetrics);

  NS_IMETHOD GetFontMetrics(nsIFontMetrics *&aFontMetrics);

  NS_IMETHOD Translate(nscoord aX, nscoord aY);
  NS_IMETHOD Scale(float aSx, float aSy);
  NS_IMETHOD GetCurrentTransform(nsTransform2D *&aTransform);

  NS_IMETHOD CreateDrawingSurface(nsRect *aBounds, PRUint32 aSurfFlags, nsDrawingSurface &aSurface);
  NS_IMETHOD DestroyDrawingSurface(nsDrawingSurface aDS);

  NS_IMETHOD DrawLine(nscoord aX0, nscoord aY0, nscoord aX1, nscoord aY1);
  NS_IMETHOD DrawStdLine(nscoord aX0, nscoord aY0, nscoord aX1, nscoord aY1);
  NS_IMETHOD DrawPolyline(const nsPoint aPoints[], PRInt32 aNumPoints);

  NS_IMETHOD DrawRect(const nsRect& aRect);
  NS_IMETHOD DrawRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);

  NS_IMETHOD FillRect(const nsRect& aRect);
  NS_IMETHOD FillRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);

  NS_IMETHOD InvertRect(const nsRect& aRect);
  NS_IMETHOD InvertRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);
  
  NS_IMETHOD DrawPolygon(const nsPoint aPoints[], PRInt32 aNumPoints);
  NS_IMETHOD FillPolygon(const nsPoint aPoints[], PRInt32 aNumPoints);

  NS_IMETHOD DrawEllipse(const nsRect& aRect);
  NS_IMETHOD DrawEllipse(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);
  NS_IMETHOD FillEllipse(const nsRect& aRect);
  NS_IMETHOD FillEllipse(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight);

  NS_IMETHOD DrawArc(const nsRect& aRect,
                     float aStartAngle, float aEndAngle);
  NS_IMETHOD DrawArc(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight,
                     float aStartAngle, float aEndAngle);
  NS_IMETHOD FillArc(const nsRect& aRect,
                     float aStartAngle, float aEndAngle);
  NS_IMETHOD FillArc(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight,
                     float aStartAngle, float aEndAngle);

  NS_IMETHOD GetWidth(char aC, nscoord &aWidth);
  NS_IMETHOD GetWidth(PRUnichar aC, nscoord &aWidth,
                      PRInt32 *aFontID);
  NS_IMETHOD GetWidth(const nsString& aString, nscoord &aWidth,
                      PRInt32 *aFontID);
  NS_IMETHOD GetWidth(const char *aString, nscoord &aWidth);
  NS_IMETHOD GetWidth(const char *aString, PRUint32 aLength, nscoord &aWidth);
  NS_IMETHOD GetWidth(const PRUnichar *aString, PRUint32 aLength, nscoord &aWidth,
                      PRInt32 *aFontID);

  NS_IMETHOD GetTextDimensions(const char* aString, PRUint32 aLength,
                               nsTextDimensions& aDimensions);

  NS_IMETHOD GetTextDimensions(const PRUnichar *aString, PRUint32 aLength,
                               nsTextDimensions& aDimensions, 
                               PRInt32 *aFontID);

  NS_IMETHOD DrawString(const char *aString, PRUint32 aLength,
                        nscoord aX, nscoord aY,
                        const nscoord* aSpacing);
  NS_IMETHOD DrawString(const PRUnichar *aString, PRUint32 aLength,
                        nscoord aX, nscoord aY,
                        PRInt32 aFontID,
                        const nscoord* aSpacing);
  NS_IMETHOD DrawString(const nsString& aString, nscoord aX, nscoord aY,
                        PRInt32 aFontID,
                        const nscoord* aSpacing);

  NS_IMETHOD DrawImage(nsIImage *aImage, nscoord aX, nscoord aY);
  NS_IMETHOD DrawImage(nsIImage *aImage, nscoord aX, nscoord aY,
                       nscoord aWidth, nscoord aHeight); 
  NS_IMETHOD DrawImage(nsIImage *aImage, const nsRect& aRect);
  NS_IMETHOD DrawImage(nsIImage *aImage, const nsRect& aSRect, const nsRect& aDRect);
#ifdef USE_NATIVE_TILING
  NS_IMETHOD DrawTile(nsIImage *aImage,nscoord aX0,nscoord aY0,nscoord aX1,nscoord aY1,
                      nscoord aWidth, nscoord aHeight);
  NS_IMETHOD DrawTile(nsIImage *aImage, nscoord aSrcXOffset,
                      nscoord aSrcYOffset, const nsRect &aTileRect);
#endif
  NS_IMETHOD CopyOffScreenBits(nsDrawingSurface aSrcSurf, PRInt32 aSrcX, PRInt32 aSrcY,
                               const nsRect &aDestBounds, PRUint32 aCopyFlags);
  NS_IMETHOD RetrieveCurrentNativeGraphicData(PRUint32 * ngd);

  //locals
  NS_IMETHOD	CommonInit();

  void CreateClipRegion() {
    static NS_DEFINE_CID(kRegionCID, NS_REGION_CID);
    if (mClipRegion)
      return;

    PRUint32 w, h;
    mSurface->GetSize(&w, &h);
    
    mClipRegion = do_CreateInstance(kRegionCID);
    if (mClipRegion) {
      mClipRegion->Init();
      mClipRegion->SetTo(0,0,w,h);
    }
  }

protected:
  nsDrawingSurfaceBeOS *mOffscreenSurface;
  nsDrawingSurfaceBeOS	*mSurface;
  nsIDeviceContext		*mContext;
  nsIFontMetrics			*mFontMetrics;
  nsCOMPtr<nsIRegion>    mClipRegion;
  float					mP2T;

  // graphic state stack (GraphicsState)
  nsVoidArray				*mStateCache;
	
  BView					*mView;
  PRUint8				*mGammaTable;
  nscolor                mCurrentColor;
  BFont					*mCurrentFont;
  nsLineStyle				mCurrentLineStyle;
  
  void UpdateView();
  // ConditionRect is used to fix coordinate overflow problems for
  // rectangles after they are transformed to screen coordinates
  void ConditionRect(nscoord &x, nscoord &y, nscoord &w, nscoord &h) {
    if ( y < -32766 ) {
      y = -32766;
    }

    if ( y + h > 32766 ) {
      h  = 32766 - y;
    }

    if ( x < -32766 ) {
      x = -32766;
    }

    if ( x + w > 32766 ) {
      w  = 32766 - x;
    }
  }  
};

#endif /* nsRenderingContextBeOS_h___ */