35803990c9
Other canvas implementations passed it through, but cairo canvas was not. Change-Id: I9b4cc500998635568c095866f9099f83bf1c984e Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153299 Tested-by: Jenkins Reviewed-by: خالد حسني <khaled@libreoffice.org>
303 lines
13 KiB
C++
303 lines
13 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 <sal/config.h>
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#include <com/sun/star/rendering/TextDirection.hpp>
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#include <rtl/math.hxx>
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#include <basegfx/matrix/b2dhommatrix.hxx>
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#include <comphelper/diagnose_ex.hxx>
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#include <vcl/canvastools.hxx>
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#include <vcl/metric.hxx>
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#include <vcl/virdev.hxx>
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#include <canvas/canvastools.hxx>
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#include <verifyinput.hxx>
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#include "cairo_canvasfont.hxx"
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#include "cairo_canvashelper.hxx"
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#include "cairo_textlayout.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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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 const & 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 ).GetAverageFontWidth() );
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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.SetAverageFontWidth( 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.GetFontHeight() );
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io_rVCLFont.SetFontHeight( ::basegfx::fround(nFontHeight * aScale.getY()) );
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}
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io_rVCLFont.SetOrientation( Degree10( ::basegfx::fround(-basegfx::rad2deg<10>(fmod(nRotate, 2*M_PI))) ) );
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// TODO(F2): Missing functionality in VCL: shearing
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o_rPoint.setX( ::basegfx::fround(aTranslate.getX()) );
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o_rPoint.setY( ::basegfx::fround(aTranslate.getY()) );
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return true;
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}
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static void
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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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{
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::canvas::tools::verifyInput( renderState,
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__func__,
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const_cast<rendering::XCanvas*>(pOwner), // only for refcount
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2,
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3 /* text */ );
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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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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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aColor.SetAlpha(255);
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rOutDev.SetTextColor( aColor );
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}
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namespace {
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class DeviceSettingsGuard
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{
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private:
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VclPtr<OutputDevice> mpVirtualDevice;
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bool mbMappingWasEnabled;
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public:
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DeviceSettingsGuard(OutputDevice *pVirtualDevice)
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: mpVirtualDevice(pVirtualDevice)
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, mbMappingWasEnabled(mpVirtualDevice->IsMapModeEnabled())
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{
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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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}
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};
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}
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static 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 );
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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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if (pFont->getEmphasisMark())
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aVCLFont.SetEmphasisMark(FontEmphasisMark(pFont->getEmphasisMark()));
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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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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());
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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 >(nullptr); // no output necessary
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// change text direction and layout mode
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vcl::text::ComplexTextLayoutFlags nLayoutMode(vcl::text::ComplexTextLayoutFlags::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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case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
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nLayoutMode |= vcl::text::ComplexTextLayoutFlags::BiDiStrong;
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nLayoutMode |= vcl::text::ComplexTextLayoutFlags::TextOriginLeft;
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break;
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case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
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nLayoutMode |= vcl::text::ComplexTextLayoutFlags::BiDiRtl;
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[[fallthrough]];
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case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
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nLayoutMode |= vcl::text::ComplexTextLayoutFlags::BiDiRtl | vcl::text::ComplexTextLayoutFlags::BiDiStrong;
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nLayoutMode |= vcl::text::ComplexTextLayoutFlags::TextOriginRight;
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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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rtl::Reference pTextLayout( new TextLayout(text, textDirection, 0, CanvasFont::Reference(dynamic_cast< CanvasFont* >( xFont.get() )), mpSurfaceProvider) );
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pTextLayout->draw(*mpVirtualDevice, aOutpos, viewState, renderState);
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}
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return uno::Reference< rendering::XCachedPrimitive >(nullptr);
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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());
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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 >(nullptr); // no output necessary
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// TODO(F2): What about the offset scalings?
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pTextLayout->draw(*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 >(nullptr);
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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