/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is
 * Crocodile Clips Ltd..
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include <windows.h>

// unknwn.h is needed to build with WIN32_LEAN_AND_MEAN
#include <unknwn.h>

#include <Gdiplus.h>
using namespace Gdiplus;

#include "nsCOMPtr.h"
#include "nsSVGGDIPlusGlyphGeometry.h"
#include "nsISVGRendererGlyphGeometry.h"
#include "nsISVGGDIPlusCanvas.h"
#include "nsIDOMSVGMatrix.h"
#include "nsSVGGDIPlusRegion.h"
#include "nsISVGGDIPlusRegion.h"
#include "nsISVGRendererRegion.h"
#include "nsISVGGlyphGeometrySource.h"
#include "nsPromiseFlatString.h"
#include "nsSVGGDIPlusGlyphMetrics.h"
#include "nsISVGGDIPlusGlyphMetrics.h"
#include "nsPresContext.h"
#include "nsMemory.h"
#include "nsSVGGDIPlusGradient.h"
#include "nsSVGTypeCIDs.h"
#include "nsIComponentManager.h"
#include "nsIDOMSVGRect.h"

#ifndef M_PI
#define M_PI 3.1415926
#endif

/**
 * \addtogroup gdiplus_renderer GDI+ Rendering Engine
 * @{
 */
////////////////////////////////////////////////////////////////////////
/**
 *  GDI+ glyph geometry implementation
 */
class nsSVGGDIPlusGlyphGeometry : public nsISVGRendererGlyphGeometry
{
protected:
  friend nsresult NS_NewSVGGDIPlusGlyphGeometry(nsISVGRendererGlyphGeometry **result,
                                                nsISVGGlyphGeometrySource *src);
  friend void gradCBPath(Graphics *gfx, Brush *brush, void *cbStruct);

  nsSVGGDIPlusGlyphGeometry();
  ~nsSVGGDIPlusGlyphGeometry();
  nsresult Init(nsISVGGlyphGeometrySource* src);

public:
  // nsISupports interface:
  NS_DECL_ISUPPORTS

  // nsISVGRendererGlyphGeometry interface:
  NS_DECL_NSISVGRENDERERGLYPHGEOMETRY

protected:
  void DrawFill(Graphics* g, Brush& b, nsISVGGradient *aGrad,
                const WCHAR* start, INT length, float x, float y);
  void GetGlobalTransform(Matrix *matrix);
  void UpdateStroke();
  void UpdateRegions(); // update covered region & hit-test region
  
  nsCOMPtr<nsISVGGlyphGeometrySource> mSource;
  nsCOMPtr<nsISVGRendererRegion> mCoveredRegion;
  Region *mHitTestRegion;
  GraphicsPath *mStroke;
};

/** @} */

//----------------------------------------------------------------------
// implementation:

nsSVGGDIPlusGlyphGeometry::nsSVGGDIPlusGlyphGeometry()
    : mStroke(nsnull), mHitTestRegion(nsnull)
{
}

nsSVGGDIPlusGlyphGeometry::~nsSVGGDIPlusGlyphGeometry()
{
  if (mStroke) delete mStroke;
  if (mHitTestRegion) delete mHitTestRegion;
}

nsresult
nsSVGGDIPlusGlyphGeometry::Init(nsISVGGlyphGeometrySource* src)
{
  mSource = src;
  return NS_OK;
}


nsresult
NS_NewSVGGDIPlusGlyphGeometry(nsISVGRendererGlyphGeometry **result,
                              nsISVGGlyphGeometrySource *src)
{
  *result = nsnull;
  
  nsSVGGDIPlusGlyphGeometry* gg = new nsSVGGDIPlusGlyphGeometry();
  if (!gg) return NS_ERROR_OUT_OF_MEMORY;

  NS_ADDREF(gg);

  nsresult rv = gg->Init(src);

  if (NS_FAILED(rv)) {
    NS_RELEASE(gg);
    return rv;
  }
  
  *result = gg;
  return rv;
}

//----------------------------------------------------------------------
// nsISupports methods:

NS_IMPL_ADDREF(nsSVGGDIPlusGlyphGeometry)
NS_IMPL_RELEASE(nsSVGGDIPlusGlyphGeometry)

NS_INTERFACE_MAP_BEGIN(nsSVGGDIPlusGlyphGeometry)
  NS_INTERFACE_MAP_ENTRY(nsISVGRendererGlyphGeometry)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END


//----------------------------------------------------------------------
// nsISVGRendererGlyphGeometry methods:

static void gradCBPath(Graphics *gfx, Brush *brush, void *cbStruct)
{
  nsSVGGDIPlusGlyphGeometry *geom = (nsSVGGDIPlusGlyphGeometry *)cbStruct;
  gfx->FillPath(brush, geom->mStroke);
}

/** Implements void render(in nsISVGRendererCanvas canvas); */
NS_IMETHODIMP
nsSVGGDIPlusGlyphGeometry::Render(nsISVGRendererCanvas *canvas)
{
  // make sure that we have constructed our render objects
  if (!mCoveredRegion) {
    nsCOMPtr<nsISVGRendererRegion> region;
    Update(nsISVGGeometrySource::UPDATEMASK_ALL, getter_AddRefs(region));
  }

  nsCOMPtr<nsISVGGDIPlusCanvas> gdiplusCanvas = do_QueryInterface(canvas);
  NS_ASSERTION(gdiplusCanvas, "wrong svg canvas for geometry!");
  if (!gdiplusCanvas) return NS_ERROR_FAILURE;

  PRUint16 canvasRenderMode;
  canvas->GetRenderMode(&canvasRenderMode);
  if (canvasRenderMode == nsISVGRendererCanvas::SVG_RENDER_MODE_CLIP) {
    nsCOMPtr<nsISVGGDIPlusGlyphMetrics> metrics;
    {
      nsCOMPtr<nsISVGRendererGlyphMetrics> xpmetrics;
      mSource->GetMetrics(getter_AddRefs(xpmetrics));
      metrics = do_QueryInterface(xpmetrics);
      NS_ASSERTION(metrics, "wrong metrics object!");
      if (!metrics)
        return NS_ERROR_FAILURE;
    }
  
    FontFamily fontFamily;
    metrics->GetFont()->GetFamily(&fontFamily);
  
    nsAutoString text;
    mSource->GetCharacterData(text);

    float x,y;
    mSource->GetX(&x);
    mSource->GetY(&y);
  
    GraphicsPath path;
    path.AddString(PromiseFlatString(text).get(), -1,
                   &fontFamily, metrics->GetFont()->GetStyle(),
                   metrics->GetFont()->GetSize(),
                   PointF(x,y), StringFormat::GenericTypographic());

    PRUint16 rule;
    mSource->GetClipRule(&rule);
    if (rule == nsISVGGeometrySource::FILL_RULE_EVENODD)
      path.SetFillMode(FillModeAlternate);
    else
      path.SetFillMode(FillModeWinding);

    Region *region = gdiplusCanvas->GetClipRegion();
    if (region)
      region->Union(&path);
    return NS_OK;
  }

  PRBool hasFill = PR_FALSE, hasStroke = PR_FALSE;
  PRUint16 filltype, stroketype;
  PRUint16 fillServerType = 0, strokeServerType = 0;

  mSource->GetFillPaintType(&filltype);
  if (filltype != nsISVGGeometrySource::PAINT_TYPE_NONE)
    hasFill = PR_TRUE;

  if (filltype == nsISVGGeometrySource::PAINT_TYPE_SERVER) {
    if(NS_FAILED(mSource->GetFillPaintServerType(&fillServerType)))
      hasFill = PR_FALSE;
  }

  mSource->GetStrokePaintType(&stroketype);
  if (stroketype != nsISVGGeometrySource::PAINT_TYPE_NONE && mStroke)
    hasStroke = PR_TRUE;

  if (stroketype == nsISVGGeometrySource::PAINT_TYPE_SERVER) {
    if(NS_FAILED(mSource->GetStrokePaintServerType(&strokeServerType)))
      hasStroke = PR_FALSE;
  }

  if (!hasFill && !hasStroke) return NS_OK; // nothing to paint
  
  gdiplusCanvas->GetGraphics()->SetSmoothingMode(SmoothingModeAntiAlias);
  //gdiplusCanvas->GetGraphics()->SetPixelOffsetMode(PixelOffsetModeHalf);
  
  nsAutoString text;
  mSource->GetCharacterData(text);

  float x,y;
  mSource->GetX(&x);
  mSource->GetY(&y);


  if (hasFill) {
    nscolor color;
    mSource->GetFillPaint(&color);

    float opacity;
    mSource->GetFillOpacity(&opacity);

    SolidBrush brush(Color((BYTE)(opacity*255),NS_GET_R(color),NS_GET_G(color),NS_GET_B(color)));
  
    nsCOMPtr<nsISVGGradient> aGrad;
    if (filltype != nsISVGGeometrySource::PAINT_TYPE_SOLID_COLOR) {
      if (fillServerType == nsISVGGeometrySource::PAINT_TYPE_GRADIENT) {
        mSource->GetFillGradient(getter_AddRefs(aGrad));
      }
    }
  
    nsAutoString text;
    mSource->GetCharacterData(text);

    DrawFill(gdiplusCanvas->GetGraphics(), brush, aGrad,
             PromiseFlatString(text).get(), text.Length(), x, y);
  }
  
  if (hasStroke) {
    nscolor color;
    mSource->GetStrokePaint(&color);
        
    float opacity;
    mSource->GetStrokeOpacity(&opacity);
  
    nsCOMPtr<nsISVGGradient> aGrad;
    if (stroketype != nsISVGGeometrySource::PAINT_TYPE_SOLID_COLOR) {
      if (strokeServerType == nsISVGGeometrySource::PAINT_TYPE_GRADIENT) {
        mSource->GetStrokeGradient(getter_AddRefs(aGrad));
      }
    }

    SolidBrush brush(Color((BYTE)(opacity*255), NS_GET_R(color), NS_GET_G(color), NS_GET_B(color)));

    // this is the 'normal' case
    if (stroketype == nsISVGGeometrySource::PAINT_TYPE_SOLID_COLOR) {
      gdiplusCanvas->GetGraphics()->FillPath(&brush, mStroke);
    } else if (strokeServerType == nsISVGGeometrySource::PAINT_TYPE_GRADIENT) {
      nsCOMPtr<nsISVGRendererRegion> region;
      GetCoveredRegion(getter_AddRefs(region));
      nsCOMPtr<nsISVGGDIPlusRegion> aRegion = do_QueryInterface(region);
      nsCOMPtr<nsIDOMSVGMatrix> ctm;
      mSource->GetCanvasTM(getter_AddRefs(ctm));
        
      GDIPlusGradient(aRegion, aGrad, ctm,
                      gdiplusCanvas->GetGraphics(), mSource,
                      gradCBPath, this);
    }
  }
  
  return NS_OK;
}

/** Implements nsISVGRendererRegion update(in unsigned long updatemask); */
NS_IMETHODIMP
nsSVGGDIPlusGlyphGeometry::Update(PRUint32 updatemask, nsISVGRendererRegion **_retval)
{
  *_retval = nsnull;

  const unsigned long strokemask =
    nsISVGGlyphMetricsSource::UPDATEMASK_FONT           |
    nsISVGGlyphMetricsSource::UPDATEMASK_CHARACTER_DATA |
    nsISVGGlyphGeometrySource::UPDATEMASK_METRICS       |
    nsISVGGlyphGeometrySource::UPDATEMASK_X             |
    nsISVGGlyphGeometrySource::UPDATEMASK_Y             |
    nsISVGGeometrySource::UPDATEMASK_STROKE_PAINT_TYPE  |
    nsISVGGeometrySource::UPDATEMASK_STROKE_WIDTH       |
    nsISVGGeometrySource::UPDATEMASK_STROKE_LINECAP     |
    nsISVGGeometrySource::UPDATEMASK_STROKE_LINEJOIN    |
    nsISVGGeometrySource::UPDATEMASK_STROKE_MITERLIMIT  |
    nsISVGGeometrySource::UPDATEMASK_STROKE_DASH_ARRAY  |
    nsISVGGeometrySource::UPDATEMASK_STROKE_DASHOFFSET  |
    nsISVGGeometrySource::UPDATEMASK_CANVAS_TM;
  
  const unsigned long regionsmask =
    nsISVGGlyphGeometrySource::UPDATEMASK_METRICS |
    nsISVGGlyphGeometrySource::UPDATEMASK_X       |
    nsISVGGlyphGeometrySource::UPDATEMASK_Y       |
    nsISVGGeometrySource::UPDATEMASK_CANVAS_TM;

  
  nsCOMPtr<nsISVGRendererRegion> regionBefore = mCoveredRegion;

    
  if ((updatemask & strokemask)!=0) {
    UpdateStroke();
  }

  if ((updatemask & regionsmask)!=0) {
    UpdateRegions();
    if (regionBefore) {
      regionBefore->Combine(mCoveredRegion, _retval);
    }
    else {
      *_retval = mCoveredRegion;
      NS_IF_ADDREF(*_retval);
    }
  }

  if (!*_retval) {
    // region hasn't changed, but something has. so invalidate whole area:
    *_retval = regionBefore;
    NS_IF_ADDREF(*_retval);
  }    
      
  return NS_OK;
}

/** Implements nsISVGRendererRegion getCoveredRegion(); */
NS_IMETHODIMP
nsSVGGDIPlusGlyphGeometry::GetCoveredRegion(nsISVGRendererRegion **_retval)
{
  *_retval = mCoveredRegion;
  NS_IF_ADDREF(*_retval);
  return NS_OK;
}

/** Implements boolean containsPoint(in float x, in float y); */
NS_IMETHODIMP
nsSVGGDIPlusGlyphGeometry::ContainsPoint(float x, float y, PRBool *_retval)
{
  *_retval = PR_FALSE;

   if (mHitTestRegion && mHitTestRegion->IsVisible(x,y)) {
     *_retval = PR_TRUE;
   }

  return NS_OK;
}

//----------------------------------------------------------------------
//

struct gradCallbackStruct {
  const WCHAR *start;
  INT length;
  nsISVGGDIPlusGlyphMetrics *metrics;
  float x, y;
  StringFormat *stringformat;
  nsSVGCharacterPosition *cp;
};

static void gradCBString(Graphics *gfx, Brush *brush, void *cbStruct)
{
  gradCallbackStruct *info = (gradCallbackStruct *)cbStruct;
  gfx->DrawString(info->start, info->length, info->metrics->GetFont(),
                  PointF(info->x, info->y), info->stringformat, brush);
  
  nsSVGCharacterPosition *cp = info->cp;

  if (!cp) {
    gfx->DrawString(info->start, info->length, info->metrics->GetFont(),
                    PointF(info->x, info->y), info->stringformat, brush);
  } else {
    for (PRUint32 i=0; i<info->length; i++) {
      if (cp[i].draw == PR_FALSE)
        continue;
      GraphicsState state = gfx->Save();
      gfx->TranslateTransform(cp[i].x, cp[i].y);
      gfx->RotateTransform(cp[i].angle * 180.0 / M_PI);
      gfx->DrawString(info->start + i, 1, info->metrics->GetFont(), PointF(0, 0),
                      info->stringformat, brush);
      gfx->Restore(state);
    }
  }
}

void
nsSVGGDIPlusGlyphGeometry::DrawFill(Graphics* g, Brush& b, nsISVGGradient *aGrad,
                                    const WCHAR* start, INT length,
                                    float x, float y)
{
  nsCOMPtr<nsISVGGDIPlusGlyphMetrics> metrics;
  {
    nsCOMPtr<nsISVGRendererGlyphMetrics> xpmetrics;
    mSource->GetMetrics(getter_AddRefs(xpmetrics));
    metrics = do_QueryInterface(xpmetrics);
    NS_ASSERTION(metrics, "wrong metrics object!");
    if (!metrics) return;
  }

  GraphicsState state = g->Save();
  
  Matrix m;
  GetGlobalTransform(&m);
  g->MultiplyTransform(&m);
  g->SetTextRenderingHint(metrics->GetTextRenderingHint());

  StringFormat stringFormat(StringFormat::GenericTypographic());
  stringFormat.SetFormatFlags(stringFormat.GetFormatFlags() |
                              StringFormatFlagsMeasureTrailingSpaces);
  stringFormat.SetLineAlignment(StringAlignmentNear);

  nsSVGCharacterPosition *cp;
  if (NS_FAILED(mSource->GetCharacterPosition(&cp)))
    return;
  
  if (aGrad) {
    nsCOMPtr<nsISVGRendererRegion> region;
    GetCoveredRegion(getter_AddRefs(region));
    nsCOMPtr<nsISVGGDIPlusRegion> aRegion = do_QueryInterface(region);
    nsCOMPtr<nsIDOMSVGMatrix> ctm;
    mSource->GetCanvasTM(getter_AddRefs(ctm));
    
    gradCallbackStruct cb;
    cb.start = start;
    cb.length = length;
    cb.metrics = metrics;
    cb.x = x;  cb.y = y;
    cb.stringformat = &stringFormat;
    cb.cp = cp;

    GDIPlusGradient(aRegion, aGrad, ctm, g, mSource, gradCBString, &cb);
  }
  else {
    if (!cp) {
      g->DrawString(start, length, metrics->GetFont(), PointF(x,y),
                    &stringFormat, &b);
    } else {
      for (PRUint32 i=0; i<length; i++) {
        if (cp[i].draw == PR_FALSE)
          continue;
        GraphicsState state = g->Save();
        g->TranslateTransform(cp[i].x, cp[i].y);
        g->RotateTransform(cp[i].angle * 180.0 / M_PI);
        g->DrawString(start + i, 1, metrics->GetFont(), PointF(0, 0),
                      &stringFormat, &b);
        g->Restore(state);
      }
    }
  }
  
  delete [] cp;
  
  g->Restore(state);
}

void
nsSVGGDIPlusGlyphGeometry::GetGlobalTransform(Matrix *matrix)
{
  nsCOMPtr<nsIDOMSVGMatrix> ctm;
  mSource->GetCanvasTM(getter_AddRefs(ctm));
  NS_ASSERTION(ctm, "graphic source didn't specify a ctm");
  
  float m[6];
  float val;
  ctm->GetA(&val);
  m[0] = val;
  
  ctm->GetB(&val);
  m[1] = val;
  
  ctm->GetC(&val);  
  m[2] = val;  
  
  ctm->GetD(&val);  
  m[3] = val;  
  
  ctm->GetE(&val);
  m[4] = val;
  
  ctm->GetF(&val);
  m[5] = val;

  matrix->SetElements(m[0],m[1],m[2],m[3],m[4],m[5]);
}

void
nsSVGGDIPlusGlyphGeometry::UpdateStroke()
{
  if (mStroke) {
    delete mStroke;
    mStroke = nsnull;
  }

  PRUint16 type;
  mSource->GetStrokePaintType(&type);
  if (type == nsISVGGeometrySource::PAINT_TYPE_NONE)
    return;

  float width;
  mSource->GetStrokeWidth(&width);
  
  if (width==0.0f) return;

  nsCOMPtr<nsISVGGDIPlusGlyphMetrics> metrics;
  {
    nsCOMPtr<nsISVGRendererGlyphMetrics> xpmetrics;
    mSource->GetMetrics(getter_AddRefs(xpmetrics));
    metrics = do_QueryInterface(xpmetrics);
    NS_ASSERTION(metrics, "wrong metrics object!");
    if (!metrics) return;
  }

  
  mStroke = new GraphicsPath();
  if (!mStroke) {
    NS_ERROR("couldn't construct graphicspath");
    return;
  }

  FontFamily fontFamily;
  metrics->GetFont()->GetFamily(&fontFamily);
  
  nsAutoString text;
  mSource->GetCharacterData(text);

  float x,y;
  mSource->GetX(&x);
  mSource->GetY(&y);

  nsSVGCharacterPosition *cp;
  if (NS_FAILED(mSource->GetCharacterPosition(&cp)))
    return;

  if (!cp) {
    mStroke->AddString(PromiseFlatString(text).get(), -1, &fontFamily,
                       metrics->GetFont()->GetStyle(),
                       metrics->GetFont()->GetSize(),
                       PointF(x,y), StringFormat::GenericTypographic());
  } else {
    for (PRUint32 i=0; i<text.Length(); i++) {
      if (cp[i].draw == PR_FALSE)
        continue;
      GraphicsPath glyph;
      Matrix matrix;

      matrix.Translate(cp[i].x, cp[i].y);
      matrix.Rotate(cp[i].angle * 180.0 / M_PI);
      glyph.AddString(PromiseFlatString(text).get() + i, 1, &fontFamily,
                      metrics->GetFont()->GetStyle(),
                      metrics->GetFont()->GetSize(),
                      PointF(0,0), StringFormat::GenericTypographic());
      glyph.Transform(&matrix);
      mStroke->AddPath(&glyph, FALSE);
    }
  }
  
  delete [] cp;

  // gdi+ seems to widen paths to >1 width unit. If our pen width is
  // smaller, we need to widen an appropriately enlarged path and then
  // scale it down after widening:
  PRBool scaleToUnitPen = width<1.0f;
  
  Pen pen(Color(), scaleToUnitPen ? 1.0f : width);

  // set linecap style
  PRUint16 capStyle;
  LineCap lcap;
  DashCap dcap;
  mSource->GetStrokeLinecap(&capStyle);
  switch (capStyle) {
    case nsISVGGeometrySource::STROKE_LINECAP_BUTT:
      lcap = LineCapFlat;
      dcap = DashCapFlat;
      break;
    case nsISVGGeometrySource::STROKE_LINECAP_ROUND:
      lcap = LineCapRound;
      dcap = DashCapRound;
      break;
    case nsISVGGeometrySource::STROKE_LINECAP_SQUARE:
      lcap = LineCapSquare;
      dcap = DashCapFlat;
      break;
  }
  pen.SetLineCap(lcap, lcap, dcap);


  // set linejoin style:
  PRUint16 joinStyle;
  LineJoin join;
  mSource->GetStrokeLinejoin(&joinStyle);
  switch(joinStyle) {
    case nsISVGGeometrySource::STROKE_LINEJOIN_MITER:
      join = LineJoinMiterClipped;
      break;
    case nsISVGGeometrySource::STROKE_LINEJOIN_ROUND:
      join = LineJoinRound;
      break;
    case nsISVGGeometrySource::STROKE_LINEJOIN_BEVEL:
      join = LineJoinBevel;
      break;
  }
  pen.SetLineJoin(join);
  
  // set miterlimit:
  float miterlimit;
  mSource->GetStrokeMiterlimit(&miterlimit);
  pen.SetMiterLimit(miterlimit);

  // set pen dashpattern
  float *dashArray;
  PRUint32 count;
  mSource->GetStrokeDashArray(&dashArray, &count);
  if (count>0) {
    if (!scaleToUnitPen) {
      for (PRUint32 i=0; i<count; ++i)
        dashArray[i]/=width;
    }
    
    pen.SetDashPattern(dashArray, count);
    nsMemory::Free(dashArray);

    float offset;
    mSource->GetStrokeDashoffset(&offset);
    if (!scaleToUnitPen)
      offset/=width;
    pen.SetDashOffset(offset);
  }

  Matrix m;
  GetGlobalTransform(&m);

  if (scaleToUnitPen) {
    Matrix enlarge(1/width, 0, 0, 1/width, 0, 0);
    mStroke->Transform(&enlarge);
    m.Scale(width,width);
  }

  
  mStroke->Widen(&pen);
  mStroke->Transform(&m);
//  mStroke->Outline();
}

void
nsSVGGDIPlusGlyphGeometry::UpdateRegions()
{
  if (mHitTestRegion) {
    delete mHitTestRegion;
    mHitTestRegion = nsnull;
  }

  nsCOMPtr<nsISVGGDIPlusGlyphMetrics> metrics;
  {
    nsCOMPtr<nsISVGRendererGlyphMetrics> xpmetrics;
    mSource->GetMetrics(getter_AddRefs(xpmetrics));
    metrics = do_QueryInterface(xpmetrics);
    NS_ASSERTION(metrics, "wrong metrics object!");
    if (!metrics) return;
  }

  nsAutoString text;
  mSource->GetCharacterData(text);
  nsSVGCharacterPosition *cp;
  if (NS_FAILED(mSource->GetCharacterPosition(&cp)))
    return;

  if (!cp) {
    mHitTestRegion = new Region(*metrics->GetBoundingRect());
    if (!mHitTestRegion)
      return;
    
    float x,y;
    mSource->GetX(&x);
    mSource->GetY(&y);
    mHitTestRegion->Translate(x, y);
  } else {
    GraphicsPath string;
    for (PRUint32 i=0; i<text.Length(); i++) {
      if (cp[i].draw == PR_FALSE)
        continue;
      GraphicsPath glyph;
      Matrix matrix;

      matrix.Translate(cp[i].x, cp[i].y);
      matrix.Rotate(cp[i].angle * 180.0 / M_PI);

      RectF bounds;
      metrics->GetSubBoundingRect(i, 1, &bounds);
      bounds.X = bounds.Y = 0;
      glyph.AddRectangle(bounds);
      glyph.Transform(&matrix);
      string.AddPath(&glyph, FALSE);
    }
    mHitTestRegion = new Region(&string);
    if (!mHitTestRegion) {
      delete [] cp;
      return;
    }
  }

  delete [] cp;

  Matrix m;
  GetGlobalTransform(&m);
  mHitTestRegion->Transform(&m);

  // clone the covered region from the hit-test region:

  nsCOMPtr<nsPresContext> presContext;
  mSource->GetPresContext(getter_AddRefs(presContext));

  NS_NewSVGGDIPlusClonedRegion(getter_AddRefs(mCoveredRegion),
                               mHitTestRegion,
                               presContext);
}

NS_IMETHODIMP
nsSVGGDIPlusGlyphGeometry::GetBoundingBox(nsIDOMSVGRect * *aBoundingBox)
{
  *aBoundingBox = nsnull;

  nsCOMPtr<nsIDOMSVGRect> rect = do_CreateInstance(NS_SVGRECT_CONTRACTID);
  NS_ASSERTION(rect, "could not create rect");
  if (!rect)
    return NS_ERROR_FAILURE;

  nsCOMPtr<nsISVGGDIPlusGlyphMetrics> metrics;
  {
    nsCOMPtr<nsISVGRendererGlyphMetrics> xpmetrics;
    mSource->GetMetrics(getter_AddRefs(xpmetrics));
    metrics = do_QueryInterface(xpmetrics);
    NS_ASSERTION(metrics, "wrong metrics object!");
    if (!metrics) return NS_ERROR_FAILURE;
  }

  nsAutoString text;
  mSource->GetCharacterData(text);
  if (!text.Length())
    return NS_OK;

  nsSVGCharacterPosition *cp;
  if (NS_FAILED(mSource->GetCharacterPosition(&cp)))
    return NS_ERROR_FAILURE;

  RectF bounds;
  if (!cp) {
    metrics->GetSubBoundingRect(0, text.Length(), &bounds, PR_FALSE);
  } else {
    GraphicsPath string;
    for (PRUint32 i=0; i<text.Length(); i++) {
      if (cp[i].draw == PR_FALSE)
        continue;
      GraphicsPath glyph;
      Matrix matrix;

      matrix.Translate(cp[i].x, cp[i].y);
      matrix.Rotate(cp[i].angle * 180.0 / M_PI);

      RectF bounds;
      metrics->GetSubBoundingRect(i, 1, &bounds, PR_FALSE);
      bounds.X = bounds.Y = 0;
      glyph.AddRectangle(bounds);
      glyph.Transform(&matrix);
      string.AddPath(&glyph, FALSE);
    }
    string.GetBounds(&bounds);
  }

  delete [] cp;

  float x,y;
  mSource->GetX(&x);
  mSource->GetY(&y);

  rect->SetX(bounds.X + x);
  rect->SetY(bounds.Y + y);
  rect->SetWidth(bounds.Width);
  rect->SetHeight(bounds.Height);

  *aBoundingBox = rect;
  NS_ADDREF(*aBoundingBox);
  
  return NS_OK;
}