LCOV - code coverage report
Current view: directory - layout/svg/base/src - nsSVGMaskFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 76 0 0.0 %
Date: 2012-06-02 Functions: 9 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) 2004
      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 the GNU General Public License Version 2 or later (the "GPL"), or
      25                 :  * 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                 : #include "nsIDocument.h"
      38                 : #include "nsSVGMaskFrame.h"
      39                 : #include "nsSVGContainerFrame.h"
      40                 : #include "nsSVGMaskElement.h"
      41                 : #include "nsSVGEffects.h"
      42                 : #include "gfxContext.h"
      43                 : #include "gfxImageSurface.h"
      44                 : 
      45                 : //----------------------------------------------------------------------
      46                 : // Implementation
      47                 : 
      48                 : nsIFrame*
      49               0 : NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
      50                 : {
      51               0 :   return new (aPresShell) nsSVGMaskFrame(aContext);
      52                 : }
      53                 : 
      54               0 : NS_IMPL_FRAMEARENA_HELPERS(nsSVGMaskFrame)
      55                 : 
      56                 : already_AddRefed<gfxPattern>
      57               0 : nsSVGMaskFrame::ComputeMaskAlpha(nsRenderingContext *aContext,
      58                 :                                  nsIFrame* aParent,
      59                 :                                  const gfxMatrix &aMatrix,
      60                 :                                  float aOpacity)
      61                 : {
      62                 :   // If the flag is set when we get here, it means this mask frame
      63                 :   // has already been used painting the current mask, and the document
      64                 :   // has a mask reference loop.
      65               0 :   if (mInUse) {
      66               0 :     NS_WARNING("Mask loop detected!");
      67               0 :     return nsnull;
      68                 :   }
      69               0 :   AutoMaskReferencer maskRef(this);
      70                 : 
      71               0 :   nsSVGMaskElement *mask = static_cast<nsSVGMaskElement*>(mContent);
      72                 : 
      73                 :   PRUint16 units =
      74               0 :     mask->mEnumAttributes[nsSVGMaskElement::MASKUNITS].GetAnimValue();
      75               0 :   gfxRect bbox;
      76               0 :   if (units == nsIDOMSVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
      77               0 :     bbox = nsSVGUtils::GetBBox(aParent);
      78                 :   }
      79                 : 
      80                 :   gfxRect maskArea = nsSVGUtils::GetRelativeRect(units,
      81               0 :     &mask->mLengthAttributes[nsSVGMaskElement::X], bbox, aParent);
      82                 : 
      83               0 :   gfxContext *gfx = aContext->ThebesContext();
      84                 : 
      85               0 :   gfx->Save();
      86               0 :   nsSVGUtils::SetClipRect(gfx, aMatrix, maskArea);
      87               0 :   gfxRect clipExtents = gfx->GetClipExtents();
      88               0 :   clipExtents.RoundOut();
      89               0 :   gfx->Restore();
      90                 : 
      91                 : #ifdef DEBUG_tor
      92                 :   fprintf(stderr, "clip extent: %f,%f %fx%f\n",
      93                 :           clipExtents.X(), clipExtents.Y(),
      94                 :           clipExtents.Width(), clipExtents.Height());
      95                 : #endif
      96                 : 
      97                 :   bool resultOverflows;
      98                 :   gfxIntSize surfaceSize =
      99                 :     nsSVGUtils::ConvertToSurfaceSize(gfxSize(clipExtents.Width(),
     100                 :                                              clipExtents.Height()),
     101               0 :                                      &resultOverflows);
     102                 : 
     103                 :   // 0 disables mask, < 0 is an error
     104               0 :   if (surfaceSize.width <= 0 || surfaceSize.height <= 0)
     105               0 :     return nsnull;
     106                 : 
     107               0 :   if (resultOverflows)
     108               0 :     return nsnull;
     109                 : 
     110                 :   nsRefPtr<gfxImageSurface> image =
     111               0 :     new gfxImageSurface(surfaceSize, gfxASurface::ImageFormatARGB32);
     112               0 :   if (!image || image->CairoStatus())
     113               0 :     return nsnull;
     114               0 :   image->SetDeviceOffset(-clipExtents.TopLeft());
     115                 : 
     116               0 :   nsRenderingContext tmpCtx;
     117               0 :   tmpCtx.Init(this->PresContext()->DeviceContext(), image);
     118                 : 
     119               0 :   mMaskParent = aParent;
     120               0 :   if (mMaskParentMatrix) {
     121               0 :     *mMaskParentMatrix = aMatrix;
     122                 :   } else {
     123               0 :     mMaskParentMatrix = new gfxMatrix(aMatrix);
     124                 :   }
     125                 : 
     126               0 :   for (nsIFrame* kid = mFrames.FirstChild(); kid;
     127                 :        kid = kid->GetNextSibling()) {
     128                 :     // The CTM of each frame referencing us can be different
     129               0 :     nsISVGChildFrame* SVGFrame = do_QueryFrame(kid);
     130               0 :     if (SVGFrame) {
     131                 :       SVGFrame->NotifySVGChanged(
     132                 :                           nsISVGChildFrame::DO_NOT_NOTIFY_RENDERING_OBSERVERS |
     133               0 :                           nsISVGChildFrame::TRANSFORM_CHANGED);
     134                 :     }
     135               0 :     nsSVGUtils::PaintFrameWithEffects(&tmpCtx, nsnull, kid);
     136                 :   }
     137                 : 
     138               0 :   PRUint8 *data   = image->Data();
     139               0 :   PRInt32  stride = image->Stride();
     140                 : 
     141               0 :   nsIntRect rect(0, 0, surfaceSize.width, surfaceSize.height);
     142               0 :   nsSVGUtils::UnPremultiplyImageDataAlpha(data, stride, rect);
     143               0 :   if (GetStyleSVG()->mColorInterpolation ==
     144                 :       NS_STYLE_COLOR_INTERPOLATION_LINEARRGB) {
     145               0 :     nsSVGUtils::ConvertImageDataToLinearRGB(data, stride, rect);
     146                 :   }
     147                 : 
     148               0 :   for (PRInt32 y = 0; y < surfaceSize.height; y++)
     149               0 :     for (PRInt32 x = 0; x < surfaceSize.width; x++) {
     150               0 :       PRUint8 *pixel = data + stride * y + 4 * x;
     151                 : 
     152                 :       /* linearRGB -> intensity */
     153                 :       PRUint8 alpha =
     154                 :         static_cast<PRUint8>
     155               0 :                    ((pixel[GFX_ARGB32_OFFSET_R] * 0.2125 +
     156               0 :                         pixel[GFX_ARGB32_OFFSET_G] * 0.7154 +
     157               0 :                         pixel[GFX_ARGB32_OFFSET_B] * 0.0721) *
     158               0 :                        (pixel[GFX_ARGB32_OFFSET_A] / 255.0) * aOpacity);
     159                 : 
     160               0 :       memset(pixel, alpha, 4);
     161                 :     }
     162                 : 
     163               0 :   gfxPattern *retval = new gfxPattern(image);
     164               0 :   NS_IF_ADDREF(retval);
     165               0 :   return retval;
     166                 : }
     167                 : 
     168                 : /* virtual */ void
     169               0 : nsSVGMaskFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
     170                 : {
     171               0 :   nsSVGEffects::InvalidateRenderingObservers(this);
     172               0 :   nsSVGMaskFrameBase::DidSetStyleContext(aOldStyleContext);
     173               0 : }
     174                 : 
     175                 : NS_IMETHODIMP
     176               0 : nsSVGMaskFrame::AttributeChanged(PRInt32  aNameSpaceID,
     177                 :                                  nsIAtom* aAttribute,
     178                 :                                  PRInt32  aModType)
     179                 : {
     180               0 :   if (aNameSpaceID == kNameSpaceID_None &&
     181                 :       (aAttribute == nsGkAtoms::x ||
     182                 :        aAttribute == nsGkAtoms::y ||
     183                 :        aAttribute == nsGkAtoms::width ||
     184                 :        aAttribute == nsGkAtoms::height||
     185                 :        aAttribute == nsGkAtoms::maskUnits ||
     186                 :        aAttribute == nsGkAtoms::maskContentUnits)) {
     187               0 :     nsSVGEffects::InvalidateRenderingObservers(this);
     188                 :   }
     189                 : 
     190                 :   return nsSVGMaskFrameBase::AttributeChanged(aNameSpaceID,
     191               0 :                                               aAttribute, aModType);
     192                 : }
     193                 : 
     194                 : #ifdef DEBUG
     195                 : NS_IMETHODIMP
     196               0 : nsSVGMaskFrame::Init(nsIContent* aContent,
     197                 :                      nsIFrame* aParent,
     198                 :                      nsIFrame* aPrevInFlow)
     199                 : {
     200               0 :   nsCOMPtr<nsIDOMSVGMaskElement> mask = do_QueryInterface(aContent);
     201               0 :   NS_ASSERTION(mask, "Content is not an SVG mask");
     202                 : 
     203               0 :   return nsSVGMaskFrameBase::Init(aContent, aParent, aPrevInFlow);
     204                 : }
     205                 : #endif /* DEBUG */
     206                 : 
     207                 : nsIAtom *
     208               0 : nsSVGMaskFrame::GetType() const
     209                 : {
     210               0 :   return nsGkAtoms::svgMaskFrame;
     211                 : }
     212                 : 
     213                 : gfxMatrix
     214               0 : nsSVGMaskFrame::GetCanvasTM()
     215                 : {
     216               0 :   NS_ASSERTION(mMaskParentMatrix, "null parent matrix");
     217                 : 
     218               0 :   nsSVGMaskElement *mask = static_cast<nsSVGMaskElement*>(mContent);
     219                 : 
     220                 :   return nsSVGUtils::AdjustMatrixForUnits(
     221               0 :     mMaskParentMatrix ? *mMaskParentMatrix : gfxMatrix(),
     222                 :     &mask->mEnumAttributes[nsSVGMaskElement::MASKCONTENTUNITS],
     223               0 :     mMaskParent);
     224                 : }
     225                 : 

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