author Brian Birtles <>
Sun, 25 Sep 2011 22:04:32 +0100
changeset 77557 c9a9397f6db3e27cff0cf5ba8ed1fa4c3b9d85c2
parent 77132 c6d4e5bce80b58d9544405f88b2d9292a75c1ec1
child 77799 e7854b4d29ba905ae3994f821b160c989bac4260
permissions -rw-r--r--
Bug 602759 part 13 - Update layout to use new matrix and transform types; r=jwatt

/* -*- 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
 * 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 IBM Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 * Alternatively, the contents of this file may be used under the terms of
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 * 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
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 * the provisions above, a recipient may use your version of this file under
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 * ***** END LICENSE BLOCK ***** */


#include "nsSVGContainerFrame.h"
#include "gfxPattern.h"
#include "gfxMatrix.h"

class gfxContext;

typedef nsSVGContainerFrame nsSVGMaskFrameBase;

class nsSVGMaskFrame : public nsSVGMaskFrameBase
  friend nsIFrame*
  NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  nsSVGMaskFrame(nsStyleContext* aContext) :
    mInUse(PR_FALSE) {}


  // nsSVGMaskFrame method:
  already_AddRefed<gfxPattern> ComputeMaskAlpha(nsSVGRenderState *aContext,
                                                nsIFrame* aParent,
                                                const gfxMatrix &aMatrix,
                                                float aOpacity = 1.0f);

  NS_IMETHOD AttributeChanged(PRInt32         aNameSpaceID,
                              nsIAtom*        aAttribute,
                              PRInt32         aModType);

#ifdef DEBUG
  NS_IMETHOD Init(nsIContent*      aContent,
                  nsIFrame*        aParent,
                  nsIFrame*        aPrevInFlow);

   * Get the "type" of the frame
   * @see nsGkAtoms::svgMaskFrame
  virtual nsIAtom* GetType() const;

#ifdef DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const
    return MakeFrameName(NS_LITERAL_STRING("SVGMask"), aResult);

  // A helper class to allow us to paint masks safely. The helper
  // automatically sets and clears the mInUse flag on the mask frame
  // (to prevent nasty reference loops). It's easy to mess this up
  // and break things, so this helper makes the code far more robust.
  class AutoMaskReferencer
    AutoMaskReferencer(nsSVGMaskFrame *aFrame)
       : mFrame(aFrame) {
      NS_ASSERTION(!mFrame->mInUse, "reference loop!");
      mFrame->mInUse = PR_TRUE;
    ~AutoMaskReferencer() {
      mFrame->mInUse = PR_FALSE;
    nsSVGMaskFrame *mFrame;

  nsIFrame *mMaskParent;
  nsAutoPtr<gfxMatrix> mMaskParentMatrix;
  // recursion prevention flag
  PRPackedBool mInUse;

  // nsSVGContainerFrame methods:
  virtual gfxMatrix GetCanvasTM();