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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <memory>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/utils/canvastools.hxx>
#include <com/sun/star/rendering/FontRequest.hpp>
#include <com/sun/star/rendering/PanoseProportion.hpp>
#include <com/sun/star/rendering/XCanvasFont.hpp>
#include <comphelper/scopeguard.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <rtl/math.hxx>
#include <tools/color.hxx>
#include <tools/diagnose_ex.h>
#include <tools/poly.hxx>
#include <vcl/canvastools.hxx>
#include <vcl/metric.hxx>
#include <vcl/sysdata.hxx>
#include <vcl/virdev.hxx>
#include <canvas/canvastools.hxx>
#include "dx_bitmap.hxx"
#include "dx_canvasfont.hxx"
#include "dx_impltools.hxx"
#include "dx_textlayout_drawhelper.hxx"
using namespace ::com::sun::star;
namespace dxcanvas
{
TextLayoutDrawHelper::TextLayoutDrawHelper(
const uno::Reference< rendering::XGraphicDevice >& xGraphicDevice ) :
mxGraphicDevice(xGraphicDevice)
{
}
TextLayoutDrawHelper::~TextLayoutDrawHelper()
{
}
void TextLayoutDrawHelper::drawText(
const std::shared_ptr<Gdiplus::Graphics>& rGraphics,
const css::rendering::ViewState& rViewState,
const css::rendering::RenderState& rRenderState,
const ::basegfx::B2ISize& rOutputOffset,
const css::rendering::StringContext& rText,
const css::uno::Sequence< double >& rLogicalAdvancements,
const css::uno::Reference<
css::rendering::XCanvasFont >& rCanvasFont,
const css::geometry::Matrix2D& rFontMatrix,
bool bAlphaSurface,
bool bIsRTL)
{
HDC hdc = rGraphics->GetHDC();
// issue a ReleaseHDC() when leaving the scope
const ::comphelper::ScopeGuard aGuard(
[&rGraphics, &hdc]() mutable { rGraphics->ReleaseHDC(hdc); } );
SystemGraphicsData aSystemGraphicsData;
aSystemGraphicsData.nSize = sizeof(SystemGraphicsData);
aSystemGraphicsData.hDC = reinterpret_cast< ::HDC >(hdc);
ScopedVclPtrInstance<VirtualDevice> xVirtualDevice(aSystemGraphicsData, Size(1, 1), DeviceFormat::DEFAULT);
// disable font antialiasing - GDI does not handle alpha
// surfaces properly.
if( bAlphaSurface )
xVirtualDevice->SetAntialiasing(AntialiasingFlags::DisableText);
if(rText.Length)
{
bool test = mxGraphicDevice.is();
ENSURE_OR_THROW( test,
"TextLayoutDrawHelper::drawText(): Invalid GraphicDevice" );
// set text color. Make sure to remove transparence part first.
Color aColor( COL_WHITE );
if( rRenderState.DeviceColor.getLength() > 2 )
aColor = vcl::unotools::doubleSequenceToColor(
rRenderState.DeviceColor,
mxGraphicDevice->getDeviceColorSpace());
aColor.SetAlpha(255);
xVirtualDevice->SetTextColor(aColor);
// create the font
const css::rendering::FontRequest& rFontRequest = rCanvasFont->getFontRequest();
vcl::Font aFont(
rFontRequest.FontDescription.FamilyName,
rFontRequest.FontDescription.StyleName,
Size( 0, ::basegfx::fround(rFontRequest.CellSize)));
aFont.SetAlignment( ALIGN_BASELINE );
aFont.SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==css::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
aFont.SetVertical( rFontRequest.FontDescription.IsVertical==css::util::TriState_YES );
aFont.SetWeight( static_cast<FontWeight>(rFontRequest.FontDescription.FontDescription.Weight) );
aFont.SetItalic( (rFontRequest.FontDescription.FontDescription.Letterform<=8) ? ITALIC_NONE : ITALIC_NORMAL );
aFont.SetPitch(
rFontRequest.FontDescription.FontDescription.Proportion == rendering::PanoseProportion::MONO_SPACED
? PITCH_FIXED : PITCH_VARIABLE);
aFont.SetLanguage(LanguageTag::convertToLanguageType(rFontRequest.Locale));
// setup font color
aFont.SetColor( aColor );
aFont.SetFillColor( aColor );
CanvasFont::ImplRef pFont(tools::canvasFontFromXFont(rCanvasFont));
if (pFont.is() && pFont->getEmphasisMark())
aFont.SetEmphasisMark(FontEmphasisMark(pFont->getEmphasisMark()));
// adjust to stretched font
if(!::rtl::math::approxEqual(rFontMatrix.m00, rFontMatrix.m11))
{
const Size aSize = xVirtualDevice->GetFontMetric( aFont ).GetFontSize();
const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
double fStretch = rFontMatrix.m00 + rFontMatrix.m01;
if( !::basegfx::fTools::equalZero( fDividend) )
fStretch /= fDividend;
const sal_Int32 nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );
aFont.SetAverageFontWidth( nNewWidth );
}
// set font
xVirtualDevice->SetFont(aFont);
// create world transformation matrix
::basegfx::B2DHomMatrix aWorldTransform;
::canvas::tools::mergeViewAndRenderTransform(aWorldTransform, rViewState, rRenderState);
if(!rOutputOffset.equalZero())
{
aWorldTransform.translate(rOutputOffset.getX(), rOutputOffset.getY());
}
// set ViewState clipping
if(rViewState.Clip.is())
{
::basegfx::B2DPolyPolygon aClipPoly(dxcanvas::tools::polyPolygonFromXPolyPolygon2D(rViewState.Clip));
::basegfx::B2DHomMatrix aMatrix;
::basegfx::unotools::homMatrixFromAffineMatrix(aMatrix, rViewState.AffineTransform );
if(!rOutputOffset.equalZero())
{
aMatrix.translate(rOutputOffset.getX(), rOutputOffset.getY());
}
aClipPoly.transform(aMatrix);
const vcl::Region& rClipRegion = vcl::Region(::tools::PolyPolygon(aClipPoly));
xVirtualDevice->IntersectClipRegion(rClipRegion);
}
if(rRenderState.Clip.is())
{
::basegfx::B2DPolyPolygon aClipPoly(dxcanvas::tools::polyPolygonFromXPolyPolygon2D(rRenderState.Clip));
aClipPoly.transform(aWorldTransform);
const vcl::Region& rClipRegion = vcl::Region(::tools::PolyPolygon(aClipPoly));
xVirtualDevice->IntersectClipRegion(rClipRegion);
}
// set world transform
XFORM aXForm;
aXForm.eM11 = static_cast<FLOAT>(aWorldTransform.get(0, 0));
aXForm.eM12 = static_cast<FLOAT>(aWorldTransform.get(1, 0));
aXForm.eM21 = static_cast<FLOAT>(aWorldTransform.get(0, 1));
aXForm.eM22 = static_cast<FLOAT>(aWorldTransform.get(1, 1));
aXForm.eDx = static_cast<FLOAT>(aWorldTransform.get(0, 2));
aXForm.eDy = static_cast<FLOAT>(aWorldTransform.get(1, 2));
// TODO(F3): This is NOT supported on 95/98/ME!
SetGraphicsMode(hdc, GM_ADVANCED);
SetTextAlign(hdc, TA_BASELINE);
SetWorldTransform(hdc, &aXForm);
// use an empty StartPosition for text rendering
const Point aEmptyPoint(0, 0);
// create the String
const OUString aText(rText.Text);
if( rLogicalAdvancements.getLength() )
{
// create the DXArray
const sal_Int32 nLen( rLogicalAdvancements.getLength() );
std::vector<sal_Int32> DXArray( nLen );
for( sal_Int32 i=0; i<nLen; ++i )
DXArray[i] = basegfx::fround( rLogicalAdvancements[i] );
// draw the String
xVirtualDevice->DrawTextArray( aEmptyPoint,
aText,
DXArray,
rText.StartPosition,
rText.Length,
bIsRTL ? SalLayoutFlags::BiDiRtl : SalLayoutFlags::NONE);
}
else
{
// draw the String
xVirtualDevice->DrawText( aEmptyPoint,
aText,
rText.StartPosition,
rText.Length );
}
}
}
geometry::RealRectangle2D TextLayoutDrawHelper::queryTextBounds( const rendering::StringContext& rText,
const uno::Sequence< double >& rLogicalAdvancements,
const uno::Reference< rendering::XCanvasFont >& rCanvasFont,
const geometry::Matrix2D& rFontMatrix )
{
if(!(rText.Length))
return geometry::RealRectangle2D();
// TODO(F1): Fetching default screen DC here, will yield wrong
// metrics when e.g. formatting for a printer!
SystemGraphicsData aSystemGraphicsData;
aSystemGraphicsData.nSize = sizeof(SystemGraphicsData);
aSystemGraphicsData.hDC = reinterpret_cast< ::HDC >(GetDC( nullptr ));
ScopedVclPtrInstance<VirtualDevice> xVirtualDevice(aSystemGraphicsData, Size(1, 1), DeviceFormat::DEFAULT);
// create the font
const css::rendering::FontRequest& rFontRequest = rCanvasFont->getFontRequest();
vcl::Font aFont(
rFontRequest.FontDescription.FamilyName,
rFontRequest.FontDescription.StyleName,
Size( 0, ::basegfx::fround(rFontRequest.CellSize)));
aFont.SetAlignment( ALIGN_BASELINE );
aFont.SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==css::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
aFont.SetVertical( rFontRequest.FontDescription.IsVertical==css::util::TriState_YES );
aFont.SetWeight( static_cast<FontWeight>(rFontRequest.FontDescription.FontDescription.Weight) );
aFont.SetItalic( (rFontRequest.FontDescription.FontDescription.Letterform<=8) ? ITALIC_NONE : ITALIC_NORMAL );
aFont.SetPitch(
rFontRequest.FontDescription.FontDescription.Proportion == rendering::PanoseProportion::MONO_SPACED
? PITCH_FIXED : PITCH_VARIABLE);
// adjust to stretched font
if(!::rtl::math::approxEqual(rFontMatrix.m00, rFontMatrix.m11))
{
const Size aSize = xVirtualDevice->GetFontMetric( aFont ).GetFontSize();
const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
double fStretch = rFontMatrix.m00 + rFontMatrix.m01;
if( !::basegfx::fTools::equalZero( fDividend) )
fStretch /= fDividend;
const sal_Int32 nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );
aFont.SetAverageFontWidth( nNewWidth );
}
CanvasFont::ImplRef pFont(tools::canvasFontFromXFont(rCanvasFont));
if (pFont.is() && pFont->getEmphasisMark())
aFont.SetEmphasisMark(FontEmphasisMark(pFont->getEmphasisMark()));
// set font
xVirtualDevice->SetFont(aFont);
// need metrics for Y offset, the XCanvas always renders
// relative to baseline
const ::FontMetric& aMetric( xVirtualDevice->GetFontMetric() );
const sal_Int32 nAboveBaseline( -aMetric.GetInternalLeading() - aMetric.GetAscent() );
const sal_Int32 nBelowBaseline( aMetric.GetDescent() );
if( rLogicalAdvancements.getLength() )
{
return geometry::RealRectangle2D( 0, nAboveBaseline,
rLogicalAdvancements[ rLogicalAdvancements.getLength()-1 ],
nBelowBaseline );
}
else
{
return geometry::RealRectangle2D( 0, nAboveBaseline,
xVirtualDevice->GetTextWidth(
rText.Text,
::canvas::tools::numeric_cast<sal_uInt16>(rText.StartPosition),
::canvas::tools::numeric_cast<sal_uInt16>(rText.Length) ),
nBelowBaseline );
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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