LCOV - code coverage report
Current view: directory - layout/svg/base/src - nsSVGFilterInstance.h (source / functions) Found Hit Coverage
Test: app.info Lines: 14 0 0.0 %
Date: 2012-06-02 Functions: 8 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is the Mozilla SVG project.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is IBM Corporation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2005
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *
      23                 :  * Alternatively, the contents of this file may be used under the terms of
      24                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      25                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      26                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      27                 :  * of those above. If you wish to allow use of your version of this file only
      28                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      29                 :  * use your version of this file under the terms of the MPL, indicate your
      30                 :  * decision by deleting the provisions above and replace them with the notice
      31                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      32                 :  * the provisions above, a recipient may use your version of this file under
      33                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      34                 :  *
      35                 :  * ***** END LICENSE BLOCK ***** */
      36                 : 
      37                 : #ifndef __NS_SVGFILTERINSTANCE_H__
      38                 : #define __NS_SVGFILTERINSTANCE_H__
      39                 : 
      40                 : #include "nsIDOMSVGLength.h"
      41                 : #include "nsIDOMSVGFilters.h"
      42                 : #include "nsRect.h"
      43                 : #include "nsIContent.h"
      44                 : #include "nsAutoPtr.h"
      45                 : #include "nsSVGFilters.h"
      46                 : #include "nsSVGNumber2.h"
      47                 : #include "nsSVGNumberPair.h"
      48                 : 
      49                 : #include "gfxImageSurface.h"
      50                 : 
      51                 : class nsSVGElement;
      52                 : class nsSVGFilterElement;
      53                 : class nsSVGFilterPaintCallback;
      54                 : struct gfxRect;
      55                 : 
      56                 : /**
      57                 :  * This class performs all filter processing.
      58                 :  * 
      59                 :  * We build a graph of the filter image data flow, essentially
      60                 :  * converting the filter graph to SSA. This lets us easily propagate
      61                 :  * analysis data (such as bounding-boxes) over the filter primitive graph.
      62                 :  */
      63                 : class NS_STACK_CLASS nsSVGFilterInstance
      64               0 : {
      65                 : public:
      66               0 :   nsSVGFilterInstance(nsIFrame *aTargetFrame,
      67                 :                       nsSVGFilterPaintCallback *aPaintCallback,
      68                 :                       nsSVGFilterElement *aFilterElement,
      69                 :                       const gfxRect &aTargetBBox,
      70                 :                       const gfxRect& aFilterRect,
      71                 :                       const nsIntSize& aFilterSpaceSize,
      72                 :                       const gfxMatrix &aFilterSpaceToDeviceSpaceTransform,
      73                 :                       const nsIntRect& aTargetBounds,
      74                 :                       const nsIntRect& aDirtyOutputRect,
      75                 :                       const nsIntRect& aDirtyInputRect,
      76                 :                       PRUint16 aPrimitiveUnits) :
      77                 :     mTargetFrame(aTargetFrame),
      78                 :     mPaintCallback(aPaintCallback),
      79                 :     mFilterElement(aFilterElement),
      80                 :     mTargetBBox(aTargetBBox),
      81                 :     mFilterSpaceToDeviceSpaceTransform(aFilterSpaceToDeviceSpaceTransform),
      82                 :     mFilterRect(aFilterRect),
      83                 :     mFilterSpaceSize(aFilterSpaceSize),
      84                 :     mTargetBounds(aTargetBounds),
      85                 :     mDirtyOutputRect(aDirtyOutputRect),
      86                 :     mDirtyInputRect(aDirtyInputRect),
      87                 :     mSurfaceRect(nsIntPoint(0, 0), aFilterSpaceSize),
      88               0 :     mPrimitiveUnits(aPrimitiveUnits) {
      89               0 :   }
      90                 :   
      91                 :   // The area covered by temporary images, in filter space
      92                 :   void SetSurfaceRect(const nsIntRect& aRect) { mSurfaceRect = aRect; }
      93                 : 
      94                 :   gfxRect GetFilterRect() const { return mFilterRect; }
      95                 : 
      96                 :   const nsIntSize& GetFilterSpaceSize() { return mFilterSpaceSize; }
      97                 :   PRUint32 GetFilterResX() const { return mFilterSpaceSize.width; }
      98                 :   PRUint32 GetFilterResY() const { return mFilterSpaceSize.height; }
      99                 :   
     100                 :   const nsIntRect& GetSurfaceRect() const { return mSurfaceRect; }
     101                 :   PRInt32 GetSurfaceWidth() const { return mSurfaceRect.width; }
     102                 :   PRInt32 GetSurfaceHeight() const { return mSurfaceRect.height; }
     103                 :   
     104                 :   nsresult Render(gfxASurface** aOutput);
     105                 :   nsresult ComputeOutputDirtyRect(nsIntRect* aDirty);
     106                 :   nsresult ComputeSourceNeededRect(nsIntRect* aDirty);
     107                 :   nsresult ComputeOutputBBox(nsIntRect* aBBox);
     108                 : 
     109                 :   float GetPrimitiveNumber(PRUint8 aCtxType, const nsSVGNumber2 *aNumber) const
     110                 :   {
     111                 :     return GetPrimitiveNumber(aCtxType, aNumber->GetAnimValue());
     112                 :   }
     113                 :   float GetPrimitiveNumber(PRUint8 aCtxType, const nsSVGNumberPair *aNumberPair,
     114                 :                            nsSVGNumberPair::PairIndex aIndex) const
     115                 :   {
     116                 :     return GetPrimitiveNumber(aCtxType, aNumberPair->GetAnimValue(aIndex));
     117                 :   }
     118                 :   /**
     119                 :    * Converts a point and a length in filter primitive units into filter space.
     120                 :    * For object-bounding-box units, the object bounding box offset is applied
     121                 :    * to the point.
     122                 :    */
     123                 :   void ConvertLocation(float aValues[3]) const;
     124                 : 
     125                 :   gfxMatrix GetUserSpaceToFilterSpaceTransform() const;
     126               0 :   gfxMatrix GetFilterSpaceToDeviceSpaceTransform() const {
     127               0 :     return mFilterSpaceToDeviceSpaceTransform;
     128                 :   }
     129                 :   gfxPoint FilterSpaceToUserSpace(const gfxPoint& aPt) const;
     130                 : 
     131                 : private:
     132                 :   typedef nsSVGFE::Image Image;
     133                 :   typedef nsSVGFE::ColorModel ColorModel;
     134                 : 
     135               0 :   struct PrimitiveInfo {
     136                 :     nsSVGFE*  mFE;
     137                 :     // the bounding box of the result image produced by this primitive, in
     138                 :     // filter space
     139                 :     nsIntRect mResultBoundingBox;
     140                 :     // the bounding box of the part of the result image that is actually
     141                 :     // needed by other primitives or by the filter result, in filter space
     142                 :     // (used for Render only)
     143                 :     nsIntRect mResultNeededBox;
     144                 :     // the bounding box of the part of the result image that could be
     145                 :     // changed by changes to mDirtyInputRect in the source image(s)
     146                 :     // (used for ComputeOutputDirtyRect only)
     147                 :     nsIntRect mResultChangeBox;
     148                 :     Image     mImage;
     149                 :     PRInt32   mImageUsers;
     150                 :   
     151                 :     // Can't use nsAutoTArray here, because these Info objects
     152                 :     // live in nsTArrays themselves and nsTArray moves the elements
     153                 :     // around in memory, which breaks nsAutoTArray.
     154                 :     nsTArray<PrimitiveInfo*> mInputs;
     155                 : 
     156               0 :     PrimitiveInfo() : mFE(nsnull), mImageUsers(0) {}
     157                 :   };
     158                 : 
     159               0 :   class ImageAnalysisEntry : public nsStringHashKey {
     160                 :   public:
     161               0 :     ImageAnalysisEntry(KeyTypePointer aStr) : nsStringHashKey(aStr) { }
     162                 :     ImageAnalysisEntry(const ImageAnalysisEntry& toCopy) : nsStringHashKey(toCopy),
     163                 :       mInfo(toCopy.mInfo) { }
     164                 : 
     165                 :     PrimitiveInfo* mInfo;
     166                 :   };
     167                 : 
     168                 :   nsresult BuildSources();
     169                 :   // Build graph of PrimitiveInfo nodes describing filter primitives
     170                 :   nsresult BuildPrimitives();
     171                 :   // Compute bounding boxes of the filter primitive outputs
     172                 :   void ComputeResultBoundingBoxes();
     173                 :   // Compute bounding boxes of what we actually *need* from the filter
     174                 :   // primitive outputs
     175                 :   void ComputeNeededBoxes();
     176                 :   // Compute bounding boxes of what could have changed given some changes
     177                 :   // to the source images.
     178                 :   void ComputeResultChangeBoxes();
     179                 :   nsIntRect ComputeUnionOfAllNeededBoxes();
     180                 :   nsresult BuildSourceImages();
     181                 : 
     182                 :   // Allocates an image surface that covers mSurfaceRect (it uses
     183                 :   // device offsets so that its origin is positioned at mSurfaceRect.TopLeft()
     184                 :   // when using cairo to draw into the surface). The surface is cleared
     185                 :   // to transparent black.
     186                 :   already_AddRefed<gfxImageSurface> CreateImage();
     187                 : 
     188                 :   void ComputeFilterPrimitiveSubregion(PrimitiveInfo* aInfo);
     189                 :   void EnsureColorModel(PrimitiveInfo* aPrimitive,
     190                 :                         ColorModel aColorModel);
     191                 : 
     192                 :   /**
     193                 :    * Scales a numeric filter primitive length in the X, Y or "XY" directions
     194                 :    * into a length in filter space (no offset is applied).
     195                 :    */
     196                 :   float GetPrimitiveNumber(PRUint8 aCtxType, float aValue) const;
     197                 : 
     198                 :   gfxRect UserSpaceToFilterSpace(const gfxRect& aUserSpace) const;
     199               0 :   void ClipToFilterSpace(nsIntRect* aRect) const
     200                 :   {
     201               0 :     nsIntRect filterSpace(nsIntPoint(0, 0), mFilterSpaceSize);
     202               0 :     aRect->IntersectRect(*aRect, filterSpace);
     203               0 :   }
     204                 :   void ClipToGfxRect(nsIntRect* aRect, const gfxRect& aGfx) const;
     205                 : 
     206                 :   nsIFrame*               mTargetFrame;
     207                 :   nsSVGFilterPaintCallback* mPaintCallback;
     208                 :   nsSVGFilterElement*     mFilterElement;
     209                 :   // Bounding box of the target element, in user space
     210                 :   gfxRect                 mTargetBBox;
     211                 :   gfxMatrix               mFilterSpaceToDeviceSpaceTransform;
     212                 :   gfxRect                 mFilterRect;
     213                 :   nsIntSize               mFilterSpaceSize;
     214                 :   // Filter-space bounds of the target image (SourceAlpha/SourceGraphic)
     215                 :   nsIntRect               mTargetBounds;
     216                 :   nsIntRect               mDirtyOutputRect;
     217                 :   nsIntRect               mDirtyInputRect;
     218                 :   nsIntRect               mSurfaceRect;
     219                 :   PRUint16                mPrimitiveUnits;
     220                 : 
     221                 :   PrimitiveInfo           mSourceColorAlpha;
     222                 :   PrimitiveInfo           mSourceAlpha;
     223                 :   nsTArray<PrimitiveInfo> mPrimitives;
     224                 : };
     225                 : 
     226                 : #endif

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