364 lines
15 KiB
C++
364 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <canvas/debug.hxx>
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#include <canvas/canvastools.hxx>
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#include <tools/diagnose_ex.h>
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#include <vcl/virdev.hxx>
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#include <vcl/metric.hxx>
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#include <vcl/canvastools.hxx>
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#include <basegfx/polygon/b2dpolypolygon.hxx>
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#include <basegfx/tools/canvastools.hxx>
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#include "cairo_canvasfont.hxx"
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#include "cairo_textlayout.hxx"
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#include "cairo_canvashelper.hxx"
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using namespace ::cairo;
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using namespace ::com::sun::star;
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namespace cairocanvas
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{
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enum ColorType
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{
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LINE_COLOR, FILL_COLOR, TEXT_COLOR, IGNORE_COLOR
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};
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uno::Reference< rendering::XCanvasFont > CanvasHelper::createFont( const rendering::XCanvas* ,
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const rendering::FontRequest& fontRequest,
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const uno::Sequence< beans::PropertyValue >& extraFontProperties,
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const geometry::Matrix2D& fontMatrix )
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{
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return uno::Reference< rendering::XCanvasFont >( new CanvasFont( fontRequest, extraFontProperties, fontMatrix, mpSurfaceProvider ));
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}
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uno::Sequence< rendering::FontInfo > CanvasHelper::queryAvailableFonts( const rendering::XCanvas* ,
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const rendering::FontInfo& /*aFilter*/,
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const uno::Sequence< beans::PropertyValue >& /*aFontProperties*/ )
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{
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// TODO
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return uno::Sequence< rendering::FontInfo >();
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}
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static bool
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setupFontTransform( ::OutputDevice& rOutDev,
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::Point& o_rPoint,
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vcl::Font& io_rVCLFont,
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const rendering::ViewState& rViewState,
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const rendering::RenderState& rRenderState )
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{
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::basegfx::B2DHomMatrix aMatrix;
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::canvas::tools::mergeViewAndRenderTransform(aMatrix,
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rViewState,
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rRenderState);
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::basegfx::B2DTuple aScale;
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::basegfx::B2DTuple aTranslate;
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double nRotate, nShearX;
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aMatrix.decompose( aScale, aTranslate, nRotate, nShearX );
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// query font metric _before_ tampering with width and height
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if( !::rtl::math::approxEqual(aScale.getX(), aScale.getY()) )
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{
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// retrieve true font width
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const sal_Int32 nFontWidth( rOutDev.GetFontMetric( io_rVCLFont ).GetWidth() );
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const sal_Int32 nScaledFontWidth( ::basegfx::fround(nFontWidth * aScale.getX()) );
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if( !nScaledFontWidth )
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{
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// scale is smaller than one pixel - disable text
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// output altogether
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return false;
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}
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io_rVCLFont.SetWidth( nScaledFontWidth );
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}
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if( !::rtl::math::approxEqual(aScale.getY(), 1.0) )
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{
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const sal_Int32 nFontHeight( io_rVCLFont.GetHeight() );
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io_rVCLFont.SetHeight( ::basegfx::fround(nFontHeight * aScale.getY()) );
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}
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io_rVCLFont.SetOrientation( static_cast< short >( ::basegfx::fround(-fmod(nRotate, 2*M_PI)*(1800.0/M_PI)) ) );
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// TODO(F2): Missing functionality in VCL: shearing
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o_rPoint.X() = ::basegfx::fround(aTranslate.getX());
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o_rPoint.Y() = ::basegfx::fround(aTranslate.getY());
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return true;
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}
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static int
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setupOutDevState( OutputDevice& rOutDev,
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const rendering::XCanvas* pOwner,
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const rendering::ViewState& viewState,
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const rendering::RenderState& renderState,
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ColorType eColorType )
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{
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::canvas::tools::verifyInput( renderState,
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BOOST_CURRENT_FUNCTION,
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const_cast<rendering::XCanvas*>(pOwner), // only for refcount
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2,
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eColorType == IGNORE_COLOR ? 0 : 3 );
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int nTransparency(0);
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// TODO(P2): Don't change clipping all the time, maintain current clip
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// state and change only when update is necessary
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::canvas::tools::clipOutDev(viewState, renderState, rOutDev);
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if( eColorType != IGNORE_COLOR )
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{
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Color aColor( COL_WHITE );
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if( renderState.DeviceColor.getLength() > 2 )
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{
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aColor = ::vcl::unotools::stdColorSpaceSequenceToColor( renderState.DeviceColor );
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}
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// extract alpha, and make color opaque
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// afterwards. Otherwise, OutputDevice won't draw anything
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nTransparency = aColor.GetTransparency();
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aColor.SetTransparency(0);
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switch( eColorType )
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{
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case LINE_COLOR:
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rOutDev.SetLineColor( aColor );
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rOutDev.SetFillColor();
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break;
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case FILL_COLOR:
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rOutDev.SetFillColor( aColor );
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rOutDev.SetLineColor();
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break;
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case TEXT_COLOR:
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rOutDev.SetTextColor( aColor );
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break;
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default:
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ENSURE_OR_THROW( false,
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"CanvasHelper::setupOutDevState(): Unexpected color type");
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break;
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}
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}
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return nTransparency;
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}
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class DeviceSettingsGuard
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{
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private:
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OutputDevice *mpVirtualDevice;
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cairo_t *mpCairo;
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bool mbMappingWasEnabled;
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public:
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DeviceSettingsGuard(OutputDevice *pVirtualDevice, cairo_t *pCairo)
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: mpVirtualDevice(pVirtualDevice)
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, mpCairo(pCairo)
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, mbMappingWasEnabled(mpVirtualDevice->IsMapModeEnabled())
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{
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cairo_save(mpCairo);
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mpVirtualDevice->Push();
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mpVirtualDevice->EnableMapMode(false);
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}
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~DeviceSettingsGuard()
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{
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mpVirtualDevice->EnableMapMode(mbMappingWasEnabled);
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mpVirtualDevice->Pop();
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cairo_restore(mpCairo);
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}
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};
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bool setupTextOutput( OutputDevice& rOutDev,
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const rendering::XCanvas* pOwner,
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::Point& o_rOutPos,
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const rendering::ViewState& viewState,
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const rendering::RenderState& renderState,
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const uno::Reference< rendering::XCanvasFont >& xFont )
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{
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setupOutDevState( rOutDev, pOwner, viewState, renderState, TEXT_COLOR );
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CanvasFont* pFont = dynamic_cast< CanvasFont* >( xFont.get() );
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ENSURE_ARG_OR_THROW( pFont,
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"CanvasHelper::setupTextOutput(): Font not compatible with this canvas" );
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vcl::Font aVCLFont = pFont->getVCLFont();
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Color aColor( COL_BLACK );
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if( renderState.DeviceColor.getLength() > 2 )
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{
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aColor = ::vcl::unotools::stdColorSpaceSequenceToColor(renderState.DeviceColor );
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}
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// setup font color
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aVCLFont.SetColor( aColor );
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aVCLFont.SetFillColor( aColor );
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// no need to replicate this for mp2ndOutDev, we're modifying only aVCLFont here.
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if( !setupFontTransform( rOutDev, o_rOutPos, aVCLFont, viewState, renderState ) )
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return false;
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rOutDev.SetFont( aVCLFont );
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return true;
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}
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//set the clip of the rOutDev to the cairo surface
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void CanvasHelper::clip_cairo_from_dev(::OutputDevice& rOutDev)
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{
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vcl::Region aRegion(rOutDev.GetClipRegion());
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if (!aRegion.IsEmpty() && !aRegion.IsNull())
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{
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doPolyPolygonImplementation(aRegion.GetAsB2DPolyPolygon(), Clip, mpCairo.get(),
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NULL, mpSurfaceProvider, rendering::FillRule_EVEN_ODD);
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}
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}
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uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawText( const rendering::XCanvas* pOwner,
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const rendering::StringContext& text,
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const uno::Reference< rendering::XCanvasFont >& xFont,
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const rendering::ViewState& viewState,
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const rendering::RenderState& renderState,
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sal_Int8 textDirection )
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{
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#ifdef CAIRO_CANVAS_PERF_TRACE
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struct timespec aTimer;
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mxDevice->startPerfTrace( &aTimer );
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#endif
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ENSURE_ARG_OR_THROW( xFont.is(),
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"CanvasHelper::drawText(): font is NULL");
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if( !mpVirtualDevice )
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mpVirtualDevice = mpSurface->createVirtualDevice();
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if( mpVirtualDevice )
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{
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DeviceSettingsGuard aGuard(mpVirtualDevice.get(), mpCairo.get());
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#if defined CAIRO_HAS_WIN32_SURFACE
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// FIXME: Some kind of work-araound...
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cairo_rectangle (mpCairo.get(), 0, 0, 0, 0);
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cairo_fill(mpCairo.get());
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#endif
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::Point aOutpos;
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if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xFont ) )
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return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
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// change text direction and layout mode
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ComplexTextLayoutMode nLayoutMode(TEXT_LAYOUT_DEFAULT);
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switch( textDirection )
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{
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case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
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// FALLTHROUGH intended
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case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
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nLayoutMode |= TEXT_LAYOUT_BIDI_STRONG;
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nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_LEFT;
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break;
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case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
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nLayoutMode |= TEXT_LAYOUT_BIDI_RTL;
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// FALLTHROUGH intended
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case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
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nLayoutMode |= TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG;
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nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_RIGHT;
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break;
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}
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// TODO(F2): alpha
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mpVirtualDevice->SetLayoutMode( nLayoutMode );
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clip_cairo_from_dev(*mpVirtualDevice);
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OSL_TRACE(":cairocanvas::CanvasHelper::drawText(O,t,f,v,r,d): %s", OUStringToOString( text.Text.copy( text.StartPosition, text.Length ),
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RTL_TEXTENCODING_UTF8 ).getStr());
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rtl::Reference< TextLayout > pTextLayout( new TextLayout(text, textDirection, 0, CanvasFont::Reference(dynamic_cast< CanvasFont* >( xFont.get() )), mpSurfaceProvider) );
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pTextLayout->draw(mpCairo, *mpVirtualDevice, aOutpos, viewState, renderState);
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}
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return uno::Reference< rendering::XCachedPrimitive >(NULL);
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}
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uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawTextLayout( const rendering::XCanvas* pOwner,
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const uno::Reference< rendering::XTextLayout >& xLayoutedText,
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const rendering::ViewState& viewState,
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const rendering::RenderState& renderState )
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{
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ENSURE_ARG_OR_THROW( xLayoutedText.is(),
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"CanvasHelper::drawTextLayout(): layout is NULL");
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TextLayout* pTextLayout = dynamic_cast< TextLayout* >( xLayoutedText.get() );
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if( pTextLayout )
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{
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if( !mpVirtualDevice )
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mpVirtualDevice = mpSurface->createVirtualDevice();
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if( mpVirtualDevice )
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{
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DeviceSettingsGuard aGuard(mpVirtualDevice.get(), mpCairo.get());
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#if defined CAIRO_HAS_WIN32_SURFACE
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// FIXME: Some kind of work-araound...
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cairo_rectangle(mpCairo.get(), 0, 0, 0, 0);
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cairo_fill(mpCairo.get());
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#endif
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// TODO(T3): Race condition. We're taking the font
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// from xLayoutedText, and then calling draw() at it,
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// without exclusive access. Move setupTextOutput(),
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// e.g. to impltools?
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::Point aOutpos;
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if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xLayoutedText->getFont() ) )
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return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
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clip_cairo_from_dev(*mpVirtualDevice);
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// TODO(F2): What about the offset scalings?
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pTextLayout->draw(mpCairo, *mpVirtualDevice, aOutpos, viewState, renderState);
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}
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}
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else
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{
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ENSURE_ARG_OR_THROW( false,
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"CanvasHelper::drawTextLayout(): TextLayout not compatible with this canvas" );
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}
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return uno::Reference< rendering::XCachedPrimitive >(NULL);
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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