LCOV - code coverage report
Current view: directory - gfx/layers/basic - BasicImages.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 59 0 0.0 %
Date: 2012-06-02 Functions: 11 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 20; 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 Mozilla Corporation code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Mozilla Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2009
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Robert O'Callahan <robert@ocallahan.org>
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "mozilla/ReentrantMonitor.h"
      39                 : 
      40                 : #include "ImageLayers.h"
      41                 : #include "BasicLayers.h"
      42                 : #include "gfxImageSurface.h"
      43                 : 
      44                 : #ifdef XP_MACOSX
      45                 : #include "gfxQuartzImageSurface.h"
      46                 : #endif
      47                 : 
      48                 : #include "cairo.h"
      49                 : 
      50                 : #include "gfxUtils.h"
      51                 : 
      52                 : #include "gfxPlatform.h"
      53                 : 
      54                 : using mozilla::ReentrantMonitor;
      55                 : 
      56                 : namespace mozilla {
      57                 : namespace layers {
      58                 : 
      59                 : class BasicPlanarYCbCrImage : public PlanarYCbCrImage
      60                 : {
      61                 : public:
      62               0 :   BasicPlanarYCbCrImage(const gfxIntSize& aScaleHint, gfxImageFormat aOffscreenFormat, BufferRecycleBin *aRecycleBin)
      63                 :     : PlanarYCbCrImage(aRecycleBin)
      64               0 :     , mScaleHint(aScaleHint)
      65                 :   {
      66               0 :     SetOffscreenFormat(aOffscreenFormat);
      67               0 :   }
      68                 : 
      69               0 :   ~BasicPlanarYCbCrImage()
      70               0 :   {
      71               0 :     if (mDecodedBuffer) {
      72                 :       // Right now this only happens if the Image was never drawn, otherwise
      73                 :       // this will have been tossed away at surface destruction.
      74               0 :       mRecycleBin->RecycleBuffer(mDecodedBuffer.forget(), mSize.height * mStride);
      75                 :     }
      76               0 :   }
      77                 : 
      78                 :   virtual void SetData(const Data& aData);
      79                 :   already_AddRefed<gfxASurface> GetAsSurface();
      80                 : 
      81                 : private:
      82                 :   gfxIntSize mScaleHint;
      83                 :   int mStride;
      84                 :   nsAutoArrayPtr<PRUint8> mDecodedBuffer;
      85                 : };
      86                 : 
      87                 : class BasicImageFactory : public ImageFactory
      88               0 : {
      89                 : public:
      90               0 :   BasicImageFactory() {}
      91                 : 
      92               0 :   virtual already_AddRefed<Image> CreateImage(const Image::Format* aFormats,
      93                 :                                               PRUint32 aNumFormats,
      94                 :                                               const gfxIntSize &aScaleHint,
      95                 :                                               BufferRecycleBin *aRecycleBin)
      96                 :   {
      97               0 :     if (!aNumFormats) {
      98               0 :       return nsnull;
      99                 :     }
     100                 : 
     101               0 :     nsRefPtr<Image> image;
     102               0 :     if (aFormats[0] == Image::PLANAR_YCBCR) {
     103               0 :       image = new BasicPlanarYCbCrImage(aScaleHint, gfxPlatform::GetPlatform()->GetOffscreenFormat(), aRecycleBin);
     104               0 :       return image.forget();
     105                 :     }
     106                 : 
     107               0 :     return ImageFactory::CreateImage(aFormats, aNumFormats, aScaleHint, aRecycleBin);
     108                 :   }
     109                 : };
     110                 : 
     111                 : void
     112               0 : BasicPlanarYCbCrImage::SetData(const Data& aData)
     113                 : {
     114               0 :   PlanarYCbCrImage::SetData(aData);
     115                 : 
     116                 :   // Do some sanity checks to prevent integer overflow
     117               0 :   if (aData.mYSize.width > PlanarYCbCrImage::MAX_DIMENSION ||
     118                 :       aData.mYSize.height > PlanarYCbCrImage::MAX_DIMENSION) {
     119               0 :     NS_ERROR("Illegal image source width or height");
     120               0 :     return;
     121                 :   }
     122                 : 
     123               0 :   gfxASurface::gfxImageFormat format = GetOffscreenFormat();
     124                 : 
     125               0 :   gfxIntSize size(mScaleHint);
     126               0 :   gfxUtils::GetYCbCrToRGBDestFormatAndSize(aData, format, size);
     127               0 :   if (size.width > PlanarYCbCrImage::MAX_DIMENSION ||
     128                 :       size.height > PlanarYCbCrImage::MAX_DIMENSION) {
     129               0 :     NS_ERROR("Illegal image dest width or height");
     130               0 :     return;
     131                 :   }
     132                 : 
     133               0 :   mStride = gfxASurface::FormatStrideForWidth(format, size.width);
     134               0 :   mDecodedBuffer = AllocateBuffer(size.height * mStride);
     135               0 :   if (!mDecodedBuffer) {
     136                 :     // out of memory
     137               0 :     return;
     138                 :   }
     139                 : 
     140               0 :   gfxUtils::ConvertYCbCrToRGB(aData, format, size, mDecodedBuffer, mStride);
     141               0 :   SetOffscreenFormat(format);
     142               0 :   mSize = size;
     143                 : }
     144                 : 
     145                 : static cairo_user_data_key_t imageSurfaceDataKey;
     146                 : 
     147                 : static void
     148               0 : DestroyBuffer(void* aBuffer)
     149                 : {
     150               0 :   delete[] static_cast<PRUint8*>(aBuffer);
     151               0 : }
     152                 : 
     153                 : already_AddRefed<gfxASurface>
     154               0 : BasicPlanarYCbCrImage::GetAsSurface()
     155                 : {
     156               0 :   NS_ASSERTION(NS_IsMainThread(), "Must be main thread");
     157                 : 
     158               0 :   if (mSurface) {
     159               0 :     nsRefPtr<gfxASurface> result = mSurface.get();
     160               0 :     return result.forget();
     161                 :   }
     162                 : 
     163               0 :   if (!mDecodedBuffer) {
     164               0 :     return PlanarYCbCrImage::GetAsSurface();
     165                 :   }
     166                 : 
     167               0 :   gfxASurface::gfxImageFormat format = GetOffscreenFormat();
     168                 : 
     169                 :   nsRefPtr<gfxImageSurface> imgSurface =
     170               0 :       new gfxImageSurface(mDecodedBuffer, mSize, mStride, format);
     171               0 :   if (!imgSurface || imgSurface->CairoStatus() != 0) {
     172               0 :     return nsnull;
     173                 :   }
     174                 : 
     175                 :   // Pass ownership of the buffer to the surface
     176               0 :   imgSurface->SetData(&imageSurfaceDataKey, mDecodedBuffer.forget(), DestroyBuffer);
     177                 : 
     178               0 :   nsRefPtr<gfxASurface> result = imgSurface.get();
     179                 : #if defined(XP_MACOSX)
     180                 :   nsRefPtr<gfxQuartzImageSurface> quartzSurface =
     181                 :     new gfxQuartzImageSurface(imgSurface);
     182                 :   if (quartzSurface) {
     183                 :     result = quartzSurface.forget();
     184                 :   }
     185                 : #endif
     186                 : 
     187               0 :   mSurface = result;
     188                 : 
     189               0 :   return result.forget();
     190                 : }
     191                 : 
     192                 : ImageFactory*
     193               0 : BasicLayerManager::GetImageFactory()
     194                 : {
     195               0 :   if (!mFactory) {
     196               0 :     mFactory = new BasicImageFactory();
     197                 :   }
     198                 : 
     199               0 :   return mFactory.get();
     200                 : }
     201                 : 
     202                 : }
     203                 : }

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