LCOV - code coverage report
Current view: directory - gfx/thebes - gfxDrawable.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 96 0 0.0 %
Date: 2012-06-02 Functions: 14 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       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.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Markus Stange.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      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 "gfxDrawable.h"
      38                 : #include "gfxASurface.h"
      39                 : #include "gfxContext.h"
      40                 : #include "gfxPlatform.h"
      41                 : #include "mozilla/arm.h"
      42                 : #ifdef MOZ_X11
      43                 : #include "cairo.h"
      44                 : #include "gfxXlibSurface.h"
      45                 : #endif
      46                 : 
      47               0 : gfxSurfaceDrawable::gfxSurfaceDrawable(gfxASurface* aSurface,
      48                 :                                        const gfxIntSize aSize,
      49                 :                                        const gfxMatrix aTransform)
      50                 :  : gfxDrawable(aSize)
      51                 :  , mSurface(aSurface)
      52               0 :  , mTransform(aTransform)
      53                 : {
      54               0 : }
      55                 : 
      56                 : static gfxMatrix
      57               0 : DeviceToImageTransform(gfxContext* aContext,
      58                 :                        const gfxMatrix& aUserSpaceToImageSpace)
      59                 : {
      60                 :     gfxFloat deviceX, deviceY;
      61                 :     nsRefPtr<gfxASurface> currentTarget =
      62               0 :         aContext->CurrentSurface(&deviceX, &deviceY);
      63               0 :     gfxMatrix currentMatrix = aContext->CurrentMatrix();
      64               0 :     gfxMatrix deviceToUser = gfxMatrix(currentMatrix).Invert();
      65               0 :     deviceToUser.Translate(-gfxPoint(-deviceX, -deviceY));
      66               0 :     return gfxMatrix(deviceToUser).Multiply(aUserSpaceToImageSpace);
      67                 : }
      68                 : 
      69                 : static void
      70               0 : PreparePatternForUntiledDrawing(gfxPattern* aPattern,
      71                 :                                 const gfxMatrix& aDeviceToImage,
      72                 :                                 gfxASurface *currentTarget,
      73                 :                                 const gfxPattern::GraphicsFilter aDefaultFilter)
      74                 : {
      75               0 :     if (!currentTarget) {
      76                 :         // This happens if we're dealing with an Azure target.
      77               0 :         aPattern->SetExtend(gfxPattern::EXTEND_PAD);
      78               0 :         aPattern->SetFilter(aDefaultFilter);
      79               0 :         return;
      80                 :     }
      81                 : 
      82                 :     // In theory we can handle this using cairo's EXTEND_PAD,
      83                 :     // but implementation limitations mean we have to consult
      84                 :     // the surface type.
      85               0 :     switch (currentTarget->GetType()) {
      86                 : 
      87                 :         // The printing surfaces don't natively support or need
      88                 :         // EXTEND_PAD for padding the edges. Using EXTEND_PAD this way
      89                 :         // is suboptimal as it will result in the printing surface
      90                 :         // creating a new image for each fill operation. The pattern
      91                 :         // will be painted to the image to pad out the pattern, then
      92                 :         // the new image will be used as the source. This increases
      93                 :         // printing time and memory use, and prevents the use of mime
      94                 :         // data from cairo_surface_set_mime_data(). Bug 691061.
      95                 :         case gfxASurface::SurfaceTypePDF:
      96                 :         case gfxASurface::SurfaceTypePS:
      97                 :         case gfxASurface::SurfaceTypeWin32Printing:
      98               0 :             aPattern->SetExtend(gfxPattern::EXTEND_NONE);
      99               0 :             aPattern->SetFilter(aDefaultFilter);
     100               0 :             break;
     101                 : 
     102                 : #ifdef MOZ_X11
     103                 :         case gfxASurface::SurfaceTypeXlib:
     104                 :         {
     105                 :             // See bugs 324698, 422179, and 468496.  This is a workaround for
     106                 :             // XRender's RepeatPad not being implemented correctly on old X
     107                 :             // servers.
     108                 :             //
     109                 :             // In this situation, cairo avoids XRender and instead reads back
     110                 :             // to perform EXTEND_PAD with pixman.  This is too slow so we
     111                 :             // avoid EXTEND_PAD and set the filter to CAIRO_FILTER_FAST ---
     112                 :             // otherwise, pixman's sampling will sample transparency for the
     113                 :             // outside edges and we'll get blurry edges.
     114                 :             //
     115                 :             // But don't do this for simple downscales because it's horrible.
     116                 :             // Downscaling means that device-space coordinates are
     117                 :             // scaled *up* to find the image pixel coordinates.
     118                 :             //
     119                 :             // Cairo, and hence Gecko, can use RepeatPad on Xorg 1.7. We
     120                 :             // enable EXTEND_PAD provided that we're running on a recent
     121                 :             // enough X server.
     122                 : 
     123                 :             gfxXlibSurface *xlibSurface =
     124               0 :                 static_cast<gfxXlibSurface *>(currentTarget);
     125               0 :             Display *dpy = xlibSurface->XDisplay();
     126                 :             // This is the exact condition for cairo to avoid XRender for
     127                 :             // EXTEND_PAD
     128               0 :             if (VendorRelease(dpy) >= 60700000 ||
     129                 :                 VendorRelease(dpy) < 10699000) {
     130                 : 
     131                 :                 bool isDownscale =
     132                 :                     aDeviceToImage.xx >= 1.0 && aDeviceToImage.yy >= 1.0 &&
     133               0 :                     aDeviceToImage.xy == 0.0 && aDeviceToImage.yx == 0.0;
     134                 : 
     135                 :                 gfxPattern::GraphicsFilter filter =
     136               0 :                     isDownscale ? aDefaultFilter : gfxPattern::FILTER_FAST;
     137               0 :                 aPattern->SetFilter(filter);
     138                 : 
     139                 :                 // Use the default EXTEND_NONE
     140               0 :                 break;
     141                 :             }
     142                 :             // else fall through to EXTEND_PAD and the default filter.
     143                 :         }
     144                 : #endif
     145                 : 
     146                 :         default:
     147                 :             // turn on EXTEND_PAD.
     148                 :             // This is what we really want for all surface types, if the
     149                 :             // implementation was universally good.
     150               0 :             aPattern->SetExtend(gfxPattern::EXTEND_PAD);
     151               0 :             aPattern->SetFilter(aDefaultFilter);
     152               0 :             break;
     153                 :     }
     154                 : }
     155                 : 
     156                 : bool
     157               0 : gfxSurfaceDrawable::Draw(gfxContext* aContext,
     158                 :                          const gfxRect& aFillRect,
     159                 :                          bool aRepeat,
     160                 :                          const gfxPattern::GraphicsFilter& aFilter,
     161                 :                          const gfxMatrix& aTransform)
     162                 : {
     163               0 :     nsRefPtr<gfxPattern> pattern = new gfxPattern(mSurface);
     164               0 :     if (aRepeat) {
     165               0 :         pattern->SetExtend(gfxPattern::EXTEND_REPEAT);
     166               0 :         pattern->SetFilter(aFilter);
     167                 :     } else {
     168               0 :         gfxPattern::GraphicsFilter filter = aFilter;
     169               0 :         if (aContext->CurrentMatrix().HasOnlyIntegerTranslation() &&
     170               0 :             aTransform.HasOnlyIntegerTranslation())
     171                 :         {
     172                 :           // If we only have integer translation, no special filtering needs to
     173                 :           // happen and we explicitly use FILTER_FAST. This is fast for some
     174                 :           // backends.
     175               0 :           filter = gfxPattern::FILTER_FAST;
     176                 :         }
     177               0 :         nsRefPtr<gfxASurface> currentTarget = aContext->CurrentSurface();
     178                 :         gfxMatrix deviceSpaceToImageSpace =
     179               0 :             DeviceToImageTransform(aContext, aTransform);
     180                 :         PreparePatternForUntiledDrawing(pattern, deviceSpaceToImageSpace,
     181               0 :                                         currentTarget, filter);
     182                 :     }
     183               0 :     pattern->SetMatrix(gfxMatrix(aTransform).Multiply(mTransform));
     184               0 :     aContext->NewPath();
     185               0 :     aContext->SetPattern(pattern);
     186               0 :     aContext->Rectangle(aFillRect);
     187               0 :     aContext->Fill();
     188               0 :     return true;
     189                 : }
     190                 : 
     191               0 : gfxCallbackDrawable::gfxCallbackDrawable(gfxDrawingCallback* aCallback,
     192                 :                                          const gfxIntSize aSize)
     193                 :  : gfxDrawable(aSize)
     194               0 :  , mCallback(aCallback)
     195                 : {
     196               0 : }
     197                 : 
     198                 : already_AddRefed<gfxSurfaceDrawable>
     199               0 : gfxCallbackDrawable::MakeSurfaceDrawable(const gfxPattern::GraphicsFilter aFilter)
     200                 : {
     201                 :     nsRefPtr<gfxASurface> surface =
     202               0 :         gfxPlatform::GetPlatform()->CreateOffscreenSurface(mSize, gfxASurface::CONTENT_COLOR_ALPHA);
     203               0 :     if (!surface || surface->CairoStatus() != 0)
     204               0 :         return nsnull;
     205                 : 
     206               0 :     nsRefPtr<gfxContext> ctx = new gfxContext(surface);
     207               0 :     Draw(ctx, gfxRect(0, 0, mSize.width, mSize.height), false, aFilter);
     208               0 :     nsRefPtr<gfxSurfaceDrawable> drawable = new gfxSurfaceDrawable(surface, mSize);
     209               0 :     return drawable.forget();
     210                 : }
     211                 : 
     212                 : bool
     213               0 : gfxCallbackDrawable::Draw(gfxContext* aContext,
     214                 :                           const gfxRect& aFillRect,
     215                 :                           bool aRepeat,
     216                 :                           const gfxPattern::GraphicsFilter& aFilter,
     217                 :                           const gfxMatrix& aTransform)
     218                 : {
     219               0 :     if (aRepeat && !mSurfaceDrawable) {
     220               0 :         mSurfaceDrawable = MakeSurfaceDrawable(aFilter);
     221                 :     }
     222                 : 
     223               0 :     if (mSurfaceDrawable)
     224               0 :         return mSurfaceDrawable->Draw(aContext, aFillRect, aRepeat, aFilter,
     225               0 :                                       aTransform);
     226                 : 
     227               0 :     if (mCallback)
     228               0 :         return (*mCallback)(aContext, aFillRect, aFilter, aTransform);
     229                 : 
     230               0 :     return false;
     231                 : }
     232                 : 
     233               0 : gfxPatternDrawable::gfxPatternDrawable(gfxPattern* aPattern,
     234                 :                                        const gfxIntSize aSize)
     235                 :  : gfxDrawable(aSize)
     236               0 :  , mPattern(aPattern)
     237                 : {
     238               0 : }
     239                 : 
     240                 : class DrawingCallbackFromDrawable : public gfxDrawingCallback {
     241                 : public:
     242               0 :     DrawingCallbackFromDrawable(gfxDrawable* aDrawable)
     243               0 :      : mDrawable(aDrawable) {
     244               0 :         NS_ASSERTION(aDrawable, "aDrawable is null!");
     245               0 :     }
     246                 : 
     247               0 :     virtual ~DrawingCallbackFromDrawable() {}
     248                 : 
     249               0 :     virtual bool operator()(gfxContext* aContext,
     250                 :                               const gfxRect& aFillRect,
     251                 :                               const gfxPattern::GraphicsFilter& aFilter,
     252                 :                               const gfxMatrix& aTransform = gfxMatrix())
     253                 :     {
     254               0 :         return mDrawable->Draw(aContext, aFillRect, false, aFilter,
     255               0 :                                aTransform);
     256                 :     }
     257                 : private:
     258                 :     nsRefPtr<gfxDrawable> mDrawable;
     259                 : };
     260                 : 
     261                 : already_AddRefed<gfxCallbackDrawable>
     262               0 : gfxPatternDrawable::MakeCallbackDrawable()
     263                 : {
     264                 :     nsRefPtr<gfxDrawingCallback> callback =
     265               0 :         new DrawingCallbackFromDrawable(this);
     266                 :     nsRefPtr<gfxCallbackDrawable> callbackDrawable =
     267               0 :         new gfxCallbackDrawable(callback, mSize);
     268               0 :     return callbackDrawable.forget();
     269                 : }
     270                 : 
     271                 : bool
     272               0 : gfxPatternDrawable::Draw(gfxContext* aContext,
     273                 :                          const gfxRect& aFillRect,
     274                 :                          bool aRepeat,
     275                 :                          const gfxPattern::GraphicsFilter& aFilter,
     276                 :                          const gfxMatrix& aTransform)
     277                 : {
     278               0 :     if (!mPattern)
     279               0 :         return false;
     280                 : 
     281               0 :     if (aRepeat) {
     282                 :         // We can't use mPattern directly: We want our repeated tiles to have
     283                 :         // the size mSize, which might not be the case in mPattern.
     284                 :         // So we need to draw mPattern into a surface of size mSize, create
     285                 :         // a pattern from the surface and draw that pattern.
     286                 :         // gfxCallbackDrawable and gfxSurfaceDrawable already know how to do
     287                 :         // those things, so we use them here. Drawing mPattern into the surface
     288                 :         // will happen through this Draw() method with aRepeat = false.
     289               0 :         nsRefPtr<gfxCallbackDrawable> callbackDrawable = MakeCallbackDrawable();
     290               0 :         return callbackDrawable->Draw(aContext, aFillRect, true, aFilter,
     291               0 :                                       aTransform);
     292                 :     }
     293                 : 
     294               0 :     aContext->NewPath();
     295               0 :     gfxMatrix oldMatrix = mPattern->GetMatrix();
     296               0 :     mPattern->SetMatrix(gfxMatrix(aTransform).Multiply(oldMatrix));
     297               0 :     aContext->SetPattern(mPattern);
     298               0 :     aContext->Rectangle(aFillRect);
     299               0 :     aContext->Fill();
     300               0 :     mPattern->SetMatrix(oldMatrix);
     301               0 :     return true;
     302                 : }

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