LCOV - code coverage report
Current view: top level - canvas/source/cairo - cairo_canvashelper_text.cxx (source / functions) Hit Total Coverage
Test: commit 10e77ab3ff6f4314137acd6e2702a6e5c1ce1fae Lines: 1 115 0.9 %
Date: 2014-11-03 Functions: 2 9 22.2 %
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             : #include <canvas/debug.hxx>
      21             : #include <canvas/canvastools.hxx>
      22             : #include <tools/diagnose_ex.h>
      23             : 
      24             : #include <vcl/virdev.hxx>
      25             : #include <vcl/metric.hxx>
      26             : #include <vcl/canvastools.hxx>
      27             : 
      28             : #include <basegfx/polygon/b2dpolypolygon.hxx>
      29             : #include <basegfx/tools/canvastools.hxx>
      30             : 
      31             : #include "cairo_canvasfont.hxx"
      32             : #include "cairo_textlayout.hxx"
      33             : #include "cairo_canvashelper.hxx"
      34             : 
      35             : using namespace ::cairo;
      36             : using namespace ::com::sun::star;
      37             : 
      38             : namespace cairocanvas
      39             : {
      40             :     enum ColorType
      41             :     {
      42             :         LINE_COLOR, FILL_COLOR, TEXT_COLOR, IGNORE_COLOR
      43             :     };
      44             : 
      45           0 :     uno::Reference< rendering::XCanvasFont > CanvasHelper::createFont( const rendering::XCanvas*                    ,
      46             :                                                                        const rendering::FontRequest&                fontRequest,
      47             :                                                                        const uno::Sequence< beans::PropertyValue >& extraFontProperties,
      48             :                                                                        const geometry::Matrix2D&                    fontMatrix )
      49             :     {
      50           0 :         return uno::Reference< rendering::XCanvasFont >( new CanvasFont( fontRequest, extraFontProperties, fontMatrix, mpSurfaceProvider ));
      51             :     }
      52             : 
      53           0 :     uno::Sequence< rendering::FontInfo > CanvasHelper::queryAvailableFonts( const rendering::XCanvas*                       ,
      54             :                                                                             const rendering::FontInfo&                      /*aFilter*/,
      55             :                                                                             const uno::Sequence< beans::PropertyValue >&    /*aFontProperties*/ )
      56             :     {
      57             :         // TODO
      58           0 :         return uno::Sequence< rendering::FontInfo >();
      59             :     }
      60             : 
      61             :     static bool
      62           0 :     setupFontTransform( ::OutputDevice&                 rOutDev,
      63             :                         ::Point&                        o_rPoint,
      64             :                         vcl::Font&                      io_rVCLFont,
      65             :                         const rendering::ViewState&     rViewState,
      66             :                         const rendering::RenderState&   rRenderState )
      67             :     {
      68           0 :         ::basegfx::B2DHomMatrix aMatrix;
      69             : 
      70             :         ::canvas::tools::mergeViewAndRenderTransform(aMatrix,
      71             :                                                      rViewState,
      72           0 :                                                      rRenderState);
      73             : 
      74           0 :         ::basegfx::B2DTuple aScale;
      75           0 :         ::basegfx::B2DTuple aTranslate;
      76             :         double nRotate, nShearX;
      77             : 
      78           0 :         aMatrix.decompose( aScale, aTranslate, nRotate, nShearX );
      79             : 
      80             :         // query font metric _before_ tampering with width and height
      81           0 :         if( !::rtl::math::approxEqual(aScale.getX(), aScale.getY()) )
      82             :         {
      83             :             // retrieve true font width
      84           0 :             const sal_Int32 nFontWidth( rOutDev.GetFontMetric( io_rVCLFont ).GetWidth() );
      85             : 
      86           0 :             const sal_Int32 nScaledFontWidth( ::basegfx::fround(nFontWidth * aScale.getX()) );
      87             : 
      88           0 :             if( !nScaledFontWidth )
      89             :             {
      90             :                 // scale is smaller than one pixel - disable text
      91             :                 // output altogether
      92           0 :                 return false;
      93             :             }
      94             : 
      95           0 :             io_rVCLFont.SetWidth( nScaledFontWidth );
      96             :         }
      97             : 
      98           0 :         if( !::rtl::math::approxEqual(aScale.getY(), 1.0) )
      99             :         {
     100           0 :             const sal_Int32 nFontHeight( io_rVCLFont.GetHeight() );
     101           0 :             io_rVCLFont.SetHeight( ::basegfx::fround(nFontHeight * aScale.getY()) );
     102             :         }
     103             : 
     104           0 :         io_rVCLFont.SetOrientation( static_cast< short >( ::basegfx::fround(-fmod(nRotate, 2*M_PI)*(1800.0/M_PI)) ) );
     105             : 
     106             :         // TODO(F2): Missing functionality in VCL: shearing
     107           0 :         o_rPoint.X() = ::basegfx::fround(aTranslate.getX());
     108           0 :         o_rPoint.Y() = ::basegfx::fround(aTranslate.getY());
     109             : 
     110           0 :         return true;
     111             :     }
     112             : 
     113             :     static int
     114           0 :     setupOutDevState( OutputDevice&                 rOutDev,
     115             :                       const rendering::XCanvas*     pOwner,
     116             :                       const rendering::ViewState&   viewState,
     117             :                       const rendering::RenderState& renderState,
     118             :                       ColorType                     eColorType )
     119             :     {
     120             :         ::canvas::tools::verifyInput( renderState,
     121             :                                       BOOST_CURRENT_FUNCTION,
     122             :                                       const_cast<rendering::XCanvas*>(pOwner), // only for refcount
     123             :                                       2,
     124           0 :                                       eColorType == IGNORE_COLOR ? 0 : 3 );
     125             : 
     126           0 :         int nTransparency(0);
     127             : 
     128             :         // TODO(P2): Don't change clipping all the time, maintain current clip
     129             :         // state and change only when update is necessary
     130             : 
     131             :         // accumulate non-empty clips into one region
     132             :         // ==========================================
     133             : 
     134           0 :         vcl::Region aClipRegion;
     135             : 
     136           0 :         if( viewState.Clip.is() )
     137             :         {
     138             :             ::basegfx::B2DPolyPolygon aClipPoly(
     139             :                 ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
     140           0 :                     viewState.Clip) );
     141             : 
     142           0 :             if( aClipPoly.count() )
     143             :             {
     144             :                 // setup non-empty clipping
     145           0 :                 ::basegfx::B2DHomMatrix aMatrix;
     146             :                 aClipPoly.transform(
     147             :                     ::basegfx::unotools::homMatrixFromAffineMatrix( aMatrix,
     148           0 :                                                                     viewState.AffineTransform ) );
     149             : 
     150           0 :                 aClipRegion = vcl::Region::GetRegionFromPolyPolygon( tools::PolyPolygon( aClipPoly ) );
     151           0 :             }
     152             :         }
     153             : 
     154           0 :         if( renderState.Clip.is() )
     155             :         {
     156             :             ::basegfx::B2DPolyPolygon aClipPoly(
     157             :                 ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
     158           0 :                     renderState.Clip) );
     159             : 
     160           0 :             ::basegfx::B2DHomMatrix aMatrix;
     161             :             aClipPoly.transform(
     162             :                 ::canvas::tools::mergeViewAndRenderTransform( aMatrix,
     163             :                                                               viewState,
     164           0 :                                                               renderState ) );
     165             : 
     166           0 :             if( aClipPoly.count() )
     167             :             {
     168             :                 // setup non-empty clipping
     169           0 :                 vcl::Region aRegion = vcl::Region::GetRegionFromPolyPolygon( tools::PolyPolygon( aClipPoly ) );
     170             : 
     171           0 :                 if( aClipRegion.IsEmpty() )
     172           0 :                     aClipRegion = aRegion;
     173             :                 else
     174           0 :                     aClipRegion.Intersect( aRegion );
     175             :             }
     176             :             else
     177             :             {
     178             :                 // clip polygon is empty
     179           0 :                 aClipRegion.SetEmpty();
     180           0 :             }
     181             :         }
     182             : 
     183             :         // setup accumulated clip region. Note that setting an
     184             :         // empty clip region denotes "clip everything" on the
     185             :         // OutputDevice (which is why we translate that into
     186             :         // SetClipRegion() here). When both view and render clip
     187             :         // are empty, aClipRegion remains default-constructed,
     188             :         // i.e. empty, too.
     189           0 :         if( aClipRegion.IsEmpty() )
     190             :         {
     191           0 :             rOutDev.SetClipRegion();
     192             :         }
     193             :         else
     194             :         {
     195           0 :             rOutDev.SetClipRegion( aClipRegion );
     196             :         }
     197             : 
     198           0 :         if( eColorType != IGNORE_COLOR )
     199             :         {
     200           0 :             Color aColor( COL_WHITE );
     201             : 
     202           0 :             if( renderState.DeviceColor.getLength() > 2 )
     203             :             {
     204           0 :                 aColor = ::vcl::unotools::stdColorSpaceSequenceToColor( renderState.DeviceColor );
     205             :             }
     206             : 
     207             :             // extract alpha, and make color opaque
     208             :             // afterwards. Otherwise, OutputDevice won't draw anything
     209           0 :             nTransparency = aColor.GetTransparency();
     210           0 :             aColor.SetTransparency(0);
     211             : 
     212           0 :             switch( eColorType )
     213             :             {
     214             :                 case LINE_COLOR:
     215           0 :                     rOutDev.SetLineColor( aColor );
     216           0 :                     rOutDev.SetFillColor();
     217             : 
     218           0 :                     break;
     219             : 
     220             :                 case FILL_COLOR:
     221           0 :                     rOutDev.SetFillColor( aColor );
     222           0 :                     rOutDev.SetLineColor();
     223             : 
     224           0 :                     break;
     225             : 
     226             :                 case TEXT_COLOR:
     227           0 :                     rOutDev.SetTextColor( aColor );
     228             : 
     229           0 :                     break;
     230             : 
     231             :                 default:
     232           0 :                     ENSURE_OR_THROW( false,
     233             :                                       "CanvasHelper::setupOutDevState(): Unexpected color type");
     234             :                     break;
     235             :             }
     236             :         }
     237             : 
     238           0 :         return nTransparency;
     239             :     }
     240             : 
     241           0 :     bool setupTextOutput( OutputDevice&                                     rOutDev,
     242             :                           const rendering::XCanvas*                         pOwner,
     243             :                           ::Point&                                          o_rOutPos,
     244             :                           const rendering::ViewState&                       viewState,
     245             :                           const rendering::RenderState&                     renderState,
     246             :                           const uno::Reference< rendering::XCanvasFont >&   xFont   )
     247             :     {
     248           0 :         setupOutDevState( rOutDev, pOwner, viewState, renderState, TEXT_COLOR );
     249             : 
     250           0 :         vcl::Font aVCLFont;
     251             : 
     252           0 :         CanvasFont* pFont = dynamic_cast< CanvasFont* >( xFont.get() );
     253             : 
     254           0 :         ENSURE_ARG_OR_THROW( pFont,
     255             :                          "CanvasHelper::setupTextOutput(): Font not compatible with this canvas" );
     256             : 
     257           0 :         aVCLFont = pFont->getVCLFont();
     258             : 
     259           0 :         Color aColor( COL_BLACK );
     260             : 
     261           0 :         if( renderState.DeviceColor.getLength() > 2 )
     262             :         {
     263           0 :             aColor = ::vcl::unotools::stdColorSpaceSequenceToColor(renderState.DeviceColor );
     264             :         }
     265             : 
     266             :         // setup font color
     267           0 :         aVCLFont.SetColor( aColor );
     268           0 :         aVCLFont.SetFillColor( aColor );
     269             : 
     270             :         // no need to replicate this for mp2ndOutDev, we're modifying only aVCLFont here.
     271           0 :         if( !setupFontTransform( rOutDev, o_rOutPos, aVCLFont, viewState, renderState ) )
     272           0 :             return false;
     273             : 
     274           0 :         rOutDev.SetFont( aVCLFont );
     275             : 
     276             : 
     277           0 :         return true;
     278             :     }
     279             : 
     280           0 :     uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawText( const rendering::XCanvas*                         pOwner,
     281             :                                                                           const rendering::StringContext&                   text,
     282             :                                                                           const uno::Reference< rendering::XCanvasFont >&   xFont,
     283             :                                                                           const rendering::ViewState&                       viewState,
     284             :                                                                           const rendering::RenderState&                     renderState,
     285             :                                                                           sal_Int8                                          textDirection )
     286             :     {
     287             : #ifdef CAIRO_CANVAS_PERF_TRACE
     288             :         struct timespec aTimer;
     289             :         mxDevice->startPerfTrace( &aTimer );
     290             : #endif
     291             : 
     292           0 :         ENSURE_ARG_OR_THROW( xFont.is(),
     293             :                          "CanvasHelper::drawText(): font is NULL");
     294             : 
     295           0 :         if( !mpVirtualDevice )
     296           0 :             mpVirtualDevice = mpSurface->createVirtualDevice();
     297             : 
     298           0 :         if( mpVirtualDevice )
     299             :         {
     300             : #if defined CAIRO_HAS_WIN32_SURFACE
     301             :             // FIXME: Some kind of work-araound...
     302             :             cairo_rectangle (mpSurface->getCairo().get(), 0, 0, 0, 0);
     303             :             cairo_fill(mpSurface->getCairo().get());
     304             : #endif
     305           0 :             ::Point aOutpos;
     306           0 :             if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xFont ) )
     307           0 :                 return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
     308             : 
     309             :                 // change text direction and layout mode
     310           0 :             ComplexTextLayoutMode nLayoutMode(TEXT_LAYOUT_DEFAULT);
     311           0 :             switch( textDirection )
     312             :             {
     313             :                 case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
     314             :                     // FALLTHROUGH intended
     315             :                 case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
     316           0 :                     nLayoutMode |= TEXT_LAYOUT_BIDI_STRONG;
     317           0 :                     nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_LEFT;
     318           0 :                     break;
     319             : 
     320             :                 case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
     321           0 :                     nLayoutMode |= TEXT_LAYOUT_BIDI_RTL;
     322             :                     // FALLTHROUGH intended
     323             :                 case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
     324           0 :                     nLayoutMode |= TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG;
     325           0 :                     nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_RIGHT;
     326           0 :                     break;
     327             :             }
     328             : 
     329             :             // TODO(F2): alpha
     330           0 :             mpVirtualDevice->SetLayoutMode( nLayoutMode );
     331             : 
     332             :             OSL_TRACE(":cairocanvas::CanvasHelper::drawText(O,t,f,v,r,d): %s", OUStringToOString( text.Text.copy( text.StartPosition, text.Length ),
     333             :                                                                                                          RTL_TEXTENCODING_UTF8 ).getStr());
     334             : 
     335           0 :             TextLayout* pTextLayout = new TextLayout(text, textDirection, 0, CanvasFont::Reference(dynamic_cast< CanvasFont* >( xFont.get() )), mpSurfaceProvider);
     336           0 :             pTextLayout->draw( mpSurface, *mpVirtualDevice, aOutpos, viewState, renderState );
     337             :         }
     338             : 
     339           0 :         return uno::Reference< rendering::XCachedPrimitive >(NULL);
     340             :     }
     341             : 
     342           0 :     uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawTextLayout( const rendering::XCanvas*                       pOwner,
     343             :                                                                                 const uno::Reference< rendering::XTextLayout >& xLayoutedText,
     344             :                                                                                 const rendering::ViewState&                     viewState,
     345             :                                                                                 const rendering::RenderState&                   renderState )
     346             :     {
     347           0 :         ENSURE_ARG_OR_THROW( xLayoutedText.is(),
     348             :                          "CanvasHelper::drawTextLayout(): layout is NULL");
     349             : 
     350           0 :         TextLayout* pTextLayout = dynamic_cast< TextLayout* >( xLayoutedText.get() );
     351             : 
     352           0 :         if( pTextLayout )
     353             :         {
     354           0 :             if( !mpVirtualDevice )
     355           0 :                 mpVirtualDevice = mpSurface->createVirtualDevice();
     356             : 
     357           0 :             if( mpVirtualDevice )
     358             :             {
     359             : #if defined CAIRO_HAS_WIN32_SURFACE
     360             :                 // FIXME: Some kind of work-araound...
     361             :                 cairo_rectangle( mpSurface->getCairo().get(), 0, 0, 0, 0);
     362             :                 cairo_fill(mpSurface->getCairo().get());
     363             : #endif
     364             :                 // TODO(T3): Race condition. We're taking the font
     365             :                 // from xLayoutedText, and then calling draw() at it,
     366             :                 // without exclusive access. Move setupTextOutput(),
     367             :                 // e.g. to impltools?
     368             : 
     369           0 :                 ::Point aOutpos;
     370           0 :                 if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xLayoutedText->getFont() ) )
     371           0 :                     return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
     372             : 
     373             :                 // TODO(F2): What about the offset scalings?
     374           0 :                 pTextLayout->draw( mpSurface, *mpVirtualDevice, aOutpos, viewState, renderState );
     375             :             }
     376             :         }
     377             :         else
     378             :         {
     379           0 :             ENSURE_ARG_OR_THROW( false,
     380             :                              "CanvasHelper::drawTextLayout(): TextLayout not compatible with this canvas" );
     381             :         }
     382             : 
     383           0 :         return uno::Reference< rendering::XCachedPrimitive >(NULL);
     384             :     }
     385             : 
     386           6 : }
     387             : 
     388             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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