LCOV - code coverage report
Current view: top level - canvas/source/tools - surface.cxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 1 172 0.6 %
Date: 2014-04-14 Functions: 2 11 18.2 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : 
      21             : #include "surface.hxx"
      22             : #include <basegfx/polygon/b2dpolygonclipper.hxx>
      23             : #include <basegfx/matrix/b2dhommatrixtools.hxx>
      24             : #include <comphelper/scopeguard.hxx>
      25             : #include <boost/bind.hpp>
      26             : 
      27             : namespace canvas
      28             : {
      29             : 
      30             : 
      31             :     // Surface::Surface
      32             : 
      33             : 
      34           0 :     Surface::Surface( const PageManagerSharedPtr&  rPageManager,
      35             :                       const IColorBufferSharedPtr& rColorBuffer,
      36             :                       const ::basegfx::B2IPoint&   rPos,
      37             :                       const ::basegfx::B2ISize&    rSize ) :
      38             :         mpColorBuffer(rColorBuffer),
      39             :         mpPageManager(rPageManager),
      40             :         mpFragment(),
      41             :         maSourceOffset(rPos),
      42             :         maSize(rSize),
      43           0 :         mbIsDirty(true)
      44             :     {
      45           0 :     }
      46             : 
      47             : 
      48             :     // Surface::~Surface
      49             : 
      50             : 
      51           0 :     Surface::~Surface()
      52             :     {
      53           0 :         if(mpFragment)
      54           0 :             mpPageManager->free(mpFragment);
      55           0 :     }
      56             : 
      57             : 
      58             :     // Surface::getUVCoords
      59             : 
      60             : 
      61           0 :     void Surface::setColorBufferDirty()
      62             :     {
      63           0 :         mbIsDirty=true;
      64           0 :     }
      65             : 
      66             : 
      67             :     // Surface::getUVCoords
      68             : 
      69             : 
      70           0 :     basegfx::B2DRectangle Surface::getUVCoords() const
      71             :     {
      72           0 :         ::basegfx::B2ISize aPageSize(mpPageManager->getPageSize());
      73           0 :         ::basegfx::B2IPoint aDestOffset;
      74           0 :         if( mpFragment )
      75           0 :             aDestOffset = mpFragment->getPos();
      76             : 
      77           0 :         const double pw( aPageSize.getX() );
      78           0 :         const double ph( aPageSize.getY() );
      79           0 :         const double ox( aDestOffset.getX() );
      80           0 :         const double oy( aDestOffset.getY() );
      81           0 :         const double sx( maSize.getX() );
      82           0 :         const double sy( maSize.getY() );
      83             : 
      84             :         return ::basegfx::B2DRectangle( ox/pw,
      85             :                                         oy/ph,
      86           0 :                                         (ox+sx)/pw,
      87           0 :                                         (oy+sy)/ph );
      88             :     }
      89             : 
      90             : 
      91             :     // Surface::getUVCoords
      92             : 
      93             : 
      94           0 :     basegfx::B2DRectangle Surface::getUVCoords( const ::basegfx::B2IPoint& rPos,
      95             :                                                 const ::basegfx::B2ISize&  rSize ) const
      96             :     {
      97           0 :         ::basegfx::B2ISize aPageSize(mpPageManager->getPageSize());
      98             : 
      99           0 :         const double pw( aPageSize.getX() );
     100           0 :         const double ph( aPageSize.getY() );
     101           0 :         const double ox( rPos.getX() );
     102           0 :         const double oy( rPos.getY() );
     103           0 :         const double sx( rSize.getX() );
     104           0 :         const double sy( rSize.getY() );
     105             : 
     106             :         return ::basegfx::B2DRectangle( ox/pw,
     107             :                                         oy/ph,
     108           0 :                                         (ox+sx)/pw,
     109           0 :                                         (oy+sy)/ph );
     110             :     }
     111             : 
     112             : 
     113             :     // Surface::draw
     114             : 
     115             : 
     116           0 :     bool Surface::draw( double                          fAlpha,
     117             :                         const ::basegfx::B2DPoint&      rPos,
     118             :                         const ::basegfx::B2DHomMatrix&  rTransform )
     119             :     {
     120           0 :         IRenderModuleSharedPtr pRenderModule(mpPageManager->getRenderModule());
     121             : 
     122           0 :         RenderModuleGuard aGuard( pRenderModule );
     123             : 
     124           0 :         prepareRendering();
     125             : 
     126             :         // convert size to normalized device coordinates
     127           0 :         const ::basegfx::B2DRectangle& rUV( getUVCoords() );
     128             : 
     129           0 :         const double u1(rUV.getMinX());
     130           0 :         const double v1(rUV.getMinY());
     131           0 :         const double u2(rUV.getMaxX());
     132           0 :         const double v2(rUV.getMaxY());
     133             : 
     134             :         // concat transforms
     135             :         // 1) offset of surface subarea
     136             :         // 2) surface transform
     137             :         // 3) translation to output position [rPos]
     138             :         // 4) scale to normalized device coordinates
     139             :         // 5) flip y-axis
     140             :         // 6) translate to account for viewport transform
     141             :         basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(
     142           0 :             maSourceOffset.getX(), maSourceOffset.getY()));
     143           0 :         aTransform = aTransform * rTransform;
     144           0 :         aTransform.translate(::basegfx::fround(rPos.getX()),
     145           0 :                              ::basegfx::fround(rPos.getY()));
     146             : 
     147             :         /*
     148             :             ######################################
     149             :             ######################################
     150             :             ######################################
     151             : 
     152             :                            Y
     153             :                            ^+1
     154             :                            |
     155             :                    2       |       3
     156             :                      x------------x
     157             :                      |     |      |
     158             :                       |    |      |
     159             :                ------|-----O------|------>X
     160             :                -1    |     |      |     +1
     161             :                      |     |      |
     162             :                      x------------x
     163             :                     1      |       0
     164             :                             |
     165             :                            |-1
     166             : 
     167             :             ######################################
     168             :             ######################################
     169             :             ######################################
     170             :         */
     171             : 
     172           0 :         const ::basegfx::B2DPoint& p0(aTransform * ::basegfx::B2DPoint(maSize.getX(),maSize.getY()));
     173           0 :         const ::basegfx::B2DPoint& p1(aTransform * ::basegfx::B2DPoint(0.0,maSize.getY()));
     174           0 :         const ::basegfx::B2DPoint& p2(aTransform * ::basegfx::B2DPoint(0.0,0.0));
     175           0 :         const ::basegfx::B2DPoint& p3(aTransform * ::basegfx::B2DPoint(maSize.getX(),0.0));
     176             : 
     177             :         canvas::Vertex vertex;
     178           0 :         vertex.r = 1.0f;
     179           0 :         vertex.g = 1.0f;
     180           0 :         vertex.b = 1.0f;
     181           0 :         vertex.a = static_cast<float>(fAlpha);
     182           0 :         vertex.z = 0.0f;
     183             : 
     184             :         {
     185           0 :             pRenderModule->beginPrimitive( canvas::IRenderModule::PRIMITIVE_TYPE_QUAD );
     186             : 
     187             :             // issue an endPrimitive() when leaving the scope
     188             :             const ::comphelper::ScopeGuard aScopeGuard(
     189             :                 boost::bind( &::canvas::IRenderModule::endPrimitive,
     190           0 :                              ::boost::ref(pRenderModule) ) );
     191             : 
     192           0 :             vertex.u=static_cast<float>(u2); vertex.v=static_cast<float>(v2);
     193           0 :             vertex.x=static_cast<float>(p0.getX()); vertex.y=static_cast<float>(p0.getY());
     194           0 :             pRenderModule->pushVertex(vertex);
     195             : 
     196           0 :             vertex.u=static_cast<float>(u1); vertex.v=static_cast<float>(v2);
     197           0 :             vertex.x=static_cast<float>(p1.getX()); vertex.y=static_cast<float>(p1.getY());
     198           0 :             pRenderModule->pushVertex(vertex);
     199             : 
     200           0 :             vertex.u=static_cast<float>(u1); vertex.v=static_cast<float>(v1);
     201           0 :             vertex.x=static_cast<float>(p2.getX()); vertex.y=static_cast<float>(p2.getY());
     202           0 :             pRenderModule->pushVertex(vertex);
     203             : 
     204           0 :             vertex.u=static_cast<float>(u2); vertex.v=static_cast<float>(v1);
     205           0 :             vertex.x=static_cast<float>(p3.getX()); vertex.y=static_cast<float>(p3.getY());
     206           0 :             pRenderModule->pushVertex(vertex);
     207             :         }
     208             : 
     209           0 :         return !(pRenderModule->isError());
     210             :     }
     211             : 
     212             : 
     213             :     // Surface::drawRectangularArea
     214             : 
     215             : 
     216           0 :     bool Surface::drawRectangularArea(
     217             :                         double                         fAlpha,
     218             :                         const ::basegfx::B2DPoint&     rPos,
     219             :                         const ::basegfx::B2DRectangle& rArea,
     220             :                         const ::basegfx::B2DHomMatrix& rTransform )
     221             :     {
     222           0 :         if( rArea.isEmpty() )
     223           0 :             return true; // immediate exit for empty area
     224             : 
     225           0 :         IRenderModuleSharedPtr pRenderModule(mpPageManager->getRenderModule());
     226             : 
     227           0 :         RenderModuleGuard aGuard( pRenderModule );
     228             : 
     229           0 :         prepareRendering();
     230             : 
     231             :         // these positions are relative to the texture
     232             :         ::basegfx::B2IPoint aPos1(
     233             :             ::basegfx::fround(rArea.getMinimum().getX()),
     234           0 :             ::basegfx::fround(rArea.getMinimum().getY()));
     235             :         ::basegfx::B2IPoint aPos2(
     236             :             ::basegfx::fround(rArea.getMaximum().getX()),
     237           0 :             ::basegfx::fround(rArea.getMaximum().getY()) );
     238             : 
     239             :         // clip the positions to the area this surface covers
     240           0 :         aPos1.setX(::std::max(aPos1.getX(),maSourceOffset.getX()));
     241           0 :         aPos1.setY(::std::max(aPos1.getY(),maSourceOffset.getY()));
     242           0 :         aPos2.setX(::std::min(aPos2.getX(),maSourceOffset.getX()+maSize.getX()));
     243           0 :         aPos2.setY(::std::min(aPos2.getY(),maSourceOffset.getY()+maSize.getY()));
     244             : 
     245             :         // if the resulting area is empty, return immediately
     246           0 :         ::basegfx::B2IVector aSize(aPos2 - aPos1);
     247           0 :         if(aSize.getX() <= 0 || aSize.getY() <= 0)
     248           0 :             return true;
     249             : 
     250           0 :         ::basegfx::B2IPoint aDestOffset;
     251           0 :         if( mpFragment )
     252           0 :             aDestOffset = mpFragment->getPos();
     253             : 
     254             :         // convert size to normalized device coordinates
     255             :         const ::basegfx::B2DRectangle& rUV(
     256           0 :             getUVCoords(aPos1 - maSourceOffset + aDestOffset,
     257           0 :                         aSize) );
     258           0 :         const double u1(rUV.getMinX());
     259           0 :         const double v1(rUV.getMinY());
     260           0 :         const double u2(rUV.getMaxX());
     261           0 :         const double v2(rUV.getMaxY());
     262             : 
     263             :         // concatenate transforms
     264             :         // 1) offset of surface subarea
     265             :         // 2) surface transform
     266             :         // 3) translation to output position [rPos]
     267           0 :         basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(aPos1.getX(), aPos1.getY()));
     268           0 :         aTransform = aTransform * rTransform;
     269           0 :         aTransform.translate(::basegfx::fround(rPos.getX()),
     270           0 :                              ::basegfx::fround(rPos.getY()));
     271             : 
     272             : 
     273             :         /*
     274             :             ######################################
     275             :             ######################################
     276             :             ######################################
     277             : 
     278             :                            Y
     279             :                            ^+1
     280             :                            |
     281             :                    2       |       3
     282             :                      x------------x
     283             :                      |     |      |
     284             :                       |    |      |
     285             :                ------|-----O------|------>X
     286             :                -1    |     |      |     +1
     287             :                      |     |      |
     288             :                      x------------x
     289             :                     1      |       0
     290             :                             |
     291             :                            |-1
     292             : 
     293             :             ######################################
     294             :             ######################################
     295             :             ######################################
     296             :         */
     297             : 
     298           0 :         const ::basegfx::B2DPoint& p0(aTransform * ::basegfx::B2DPoint(aSize.getX(),aSize.getY()));
     299           0 :         const ::basegfx::B2DPoint& p1(aTransform * ::basegfx::B2DPoint(0.0,         aSize.getY()));
     300           0 :         const ::basegfx::B2DPoint& p2(aTransform * ::basegfx::B2DPoint(0.0,         0.0));
     301           0 :         const ::basegfx::B2DPoint& p3(aTransform * ::basegfx::B2DPoint(aSize.getX(),0.0));
     302             : 
     303             :         canvas::Vertex vertex;
     304           0 :         vertex.r = 1.0f;
     305           0 :         vertex.g = 1.0f;
     306           0 :         vertex.b = 1.0f;
     307           0 :         vertex.a = static_cast<float>(fAlpha);
     308           0 :         vertex.z = 0.0f;
     309             : 
     310             :         {
     311           0 :             pRenderModule->beginPrimitive( canvas::IRenderModule::PRIMITIVE_TYPE_QUAD );
     312             : 
     313             :             // issue an endPrimitive() when leaving the scope
     314             :             const ::comphelper::ScopeGuard aScopeGuard(
     315             :                 boost::bind( &::canvas::IRenderModule::endPrimitive,
     316           0 :                              ::boost::ref(pRenderModule) ) );
     317             : 
     318           0 :             vertex.u=static_cast<float>(u2); vertex.v=static_cast<float>(v2);
     319           0 :             vertex.x=static_cast<float>(p0.getX()); vertex.y=static_cast<float>(p0.getY());
     320           0 :             pRenderModule->pushVertex(vertex);
     321             : 
     322           0 :             vertex.u=static_cast<float>(u1); vertex.v=static_cast<float>(v2);
     323           0 :             vertex.x=static_cast<float>(p1.getX()); vertex.y=static_cast<float>(p1.getY());
     324           0 :             pRenderModule->pushVertex(vertex);
     325             : 
     326           0 :             vertex.u=static_cast<float>(u1); vertex.v=static_cast<float>(v1);
     327           0 :             vertex.x=static_cast<float>(p2.getX()); vertex.y=static_cast<float>(p2.getY());
     328           0 :             pRenderModule->pushVertex(vertex);
     329             : 
     330           0 :             vertex.u=static_cast<float>(u2); vertex.v=static_cast<float>(v1);
     331           0 :             vertex.x=static_cast<float>(p3.getX()); vertex.y=static_cast<float>(p3.getY());
     332           0 :             pRenderModule->pushVertex(vertex);
     333             :         }
     334             : 
     335           0 :         return !(pRenderModule->isError());
     336             :     }
     337             : 
     338             : 
     339             :     // Surface::drawWithClip
     340             : 
     341             : 
     342           0 :     bool Surface::drawWithClip( double                          fAlpha,
     343             :                                 const ::basegfx::B2DPoint&      rPos,
     344             :                                 const ::basegfx::B2DPolygon&    rClipPoly,
     345             :                                 const ::basegfx::B2DHomMatrix&  rTransform )
     346             :     {
     347           0 :         IRenderModuleSharedPtr pRenderModule(mpPageManager->getRenderModule());
     348             : 
     349           0 :         RenderModuleGuard aGuard( pRenderModule );
     350             : 
     351           0 :         prepareRendering();
     352             : 
     353             :         // untransformed surface rectangle, relative to the whole
     354             :         // image (note: this surface might actually only be a tile of
     355             :         // the whole image, with non-zero maSourceOffset)
     356           0 :         const double x1(maSourceOffset.getX());
     357           0 :         const double y1(maSourceOffset.getY());
     358           0 :         const double w(maSize.getX());
     359           0 :         const double h(maSize.getY());
     360           0 :         const double x2(x1+w);
     361           0 :         const double y2(y1+h);
     362           0 :         const ::basegfx::B2DRectangle aSurfaceClipRect(x1,y1,x2,y2);
     363             : 
     364             :         // concatenate transforms
     365             :         // we use 'fround' here to avoid rounding errors. the vertices will
     366             :         // be transformed by the overall transform and uv coordinates will
     367             :         // be calculated from the result, and this is why we need to use
     368             :         // integer coordinates here...
     369           0 :         basegfx::B2DHomMatrix aTransform;
     370           0 :         aTransform = aTransform * rTransform;
     371           0 :         aTransform.translate(::basegfx::fround(rPos.getX()),
     372           0 :                              ::basegfx::fround(rPos.getY()));
     373             : 
     374             :         /*
     375             :             ######################################
     376             :             ######################################
     377             :             ######################################
     378             : 
     379             :                            Y
     380             :                            ^+1
     381             :                            |
     382             :                    2       |       3
     383             :                      x------------x
     384             :                      |     |      |
     385             :                       |    |      |
     386             :                ------|-----O------|------>X
     387             :                -1    |     |      |     +1
     388             :                      |     |      |
     389             :                      x------------x
     390             :                     1      |       0
     391             :                             |
     392             :                            |-1
     393             : 
     394             :             ######################################
     395             :             ######################################
     396             :             ######################################
     397             :         */
     398             : 
     399             :         // uv coordinates that map the surface rectangle
     400             :         // to the destination rectangle.
     401           0 :         const ::basegfx::B2DRectangle& rUV( getUVCoords() );
     402             : 
     403             :         basegfx::B2DPolygon rTriangleList(basegfx::tools::clipTriangleListOnRange(rClipPoly,
     404           0 :                                                                                   aSurfaceClipRect));
     405             : 
     406             :         // Push vertices to backend renderer
     407           0 :         if(const sal_uInt32 nVertexCount = rTriangleList.count())
     408             :         {
     409             :             canvas::Vertex vertex;
     410           0 :             vertex.r = 1.0f;
     411           0 :             vertex.g = 1.0f;
     412           0 :             vertex.b = 1.0f;
     413           0 :             vertex.a = static_cast<float>(fAlpha);
     414           0 :             vertex.z = 0.0f;
     415             : 
     416             : #if defined(TRIANGLE_LOG) && defined(DBG_UTIL)
     417             :             OSL_TRACE( "Surface::draw(): numvertices %d numtriangles %d\n",
     418             :                         nVertexCount,
     419             :                         nVertexCount/3 );
     420             : #endif
     421             : 
     422           0 :             pRenderModule->beginPrimitive( canvas::IRenderModule::PRIMITIVE_TYPE_TRIANGLE );
     423             : 
     424             :             // issue an endPrimitive() when leaving the scope
     425             :             const ::comphelper::ScopeGuard aScopeGuard(
     426             :                 boost::bind( &::canvas::IRenderModule::endPrimitive,
     427           0 :                                 ::boost::ref(pRenderModule) ) );
     428             : 
     429           0 :             for(sal_uInt32 nIndex=0; nIndex<nVertexCount; ++nIndex)
     430             :             {
     431           0 :                 const basegfx::B2DPoint &aPoint = rTriangleList.getB2DPoint(nIndex);
     432           0 :                 basegfx::B2DPoint aTransformedPoint(aTransform * aPoint);
     433           0 :                 const double tu(((aPoint.getX()-aSurfaceClipRect.getMinX())*rUV.getWidth()/w)+rUV.getMinX());
     434           0 :                 const double tv(((aPoint.getY()-aSurfaceClipRect.getMinY())*rUV.getHeight()/h)+rUV.getMinY());
     435           0 :                 vertex.u=static_cast<float>(tu);
     436           0 :                 vertex.v=static_cast<float>(tv);
     437           0 :                 vertex.x=static_cast<float>(aTransformedPoint.getX());
     438           0 :                 vertex.y=static_cast<float>(aTransformedPoint.getY());
     439           0 :                 pRenderModule->pushVertex(vertex);
     440           0 :             }
     441             :         }
     442             : 
     443           0 :         return !(pRenderModule->isError());
     444             :     }
     445             : 
     446             : 
     447             :     // Surface::prepareRendering
     448             : 
     449             : 
     450           0 :     void Surface::prepareRendering()
     451             :     {
     452           0 :         mpPageManager->validatePages();
     453             : 
     454             :         // clients requested to draw from this surface, therefore one
     455             :         // of the above implemented concrete rendering operations
     456             :         // was triggered. we therefore need to ask the pagemanager
     457             :         // to allocate some space for the fragment we're dedicated to.
     458           0 :         if(!(mpFragment))
     459             :         {
     460           0 :             mpFragment = mpPageManager->allocateSpace(maSize);
     461           0 :             if( mpFragment )
     462             :             {
     463           0 :                 mpFragment->setColorBuffer(mpColorBuffer);
     464           0 :                 mpFragment->setSourceOffset(maSourceOffset);
     465             :             }
     466             :         }
     467             : 
     468           0 :         if( mpFragment )
     469             :         {
     470             :             // now we need to 'select' the fragment, which will in turn
     471             :             // pull information from the image on demand.
     472             :             // in case this fragment is still not located on any of the
     473             :             // available pages ['naked'], we force the page manager to
     474             :             // do it now, no way to defer this any longer...
     475           0 :             if(!(mpFragment->select(mbIsDirty)))
     476           0 :                 mpPageManager->nakedFragment(mpFragment);
     477             : 
     478             :         }
     479           0 :         mbIsDirty=false;
     480           0 :     }
     481           3 : }
     482             : 
     483             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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