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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 <algorithm>
+#include <memory>
+#include <vector>
+
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/range/b2drectangle.hxx>
+#include <basegfx/range/b2irectangle.hxx>
+#include <basegfx/utils/canvastools.hxx>
+#include <com/sun/star/geometry/IntegerRectangle2D.hpp>
+#include <com/sun/star/geometry/RealPoint2D.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <tools/diagnose_ex.h>
+
+#include <canvas/canvastools.hxx>
+#include <verifyinput.hxx>
+
+#include "dx_canvas.hxx"
+#include "dx_canvasbitmap.hxx"
+#include "dx_canvasfont.hxx"
+#include "dx_impltools.hxx"
+#include "dx_linepolypolygon.hxx"
+#include "dx_spritecanvas.hxx"
+#include "dx_vcltools.hxx"
+
+
+using namespace ::com::sun::star;
+
+
+namespace dxcanvas
+{
+ namespace tools
+ {
+ ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly )
+ {
+ LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
+
+ if( pPolyImpl )
+ {
+ return pPolyImpl->getPolyPolygon();
+ }
+ else
+ {
+ const sal_Int32 nPolys( xPoly->getNumberOfPolygons() );
+
+ // not a known implementation object - try data source
+ // interfaces
+ uno::Reference< rendering::XBezierPolyPolygon2D > xBezierPoly(
+ xPoly,
+ uno::UNO_QUERY );
+
+ if( xBezierPoly.is() )
+ {
+ return ::basegfx::unotools::polyPolygonFromBezier2DSequenceSequence(
+ xBezierPoly->getBezierSegments( 0,
+ nPolys,
+ 0,
+ -1 ) );
+ }
+ else
+ {
+ uno::Reference< rendering::XLinePolyPolygon2D > xLinePoly(
+ xPoly,
+ uno::UNO_QUERY );
+
+ // no implementation class and no data provider
+ // found - contract violation.
+ ENSURE_ARG_OR_THROW( xLinePoly.is(),
+ "VCLCanvas::polyPolygonFromXPolyPolygon2D(): Invalid input "
+ "poly-polygon, cannot retrieve vertex data" );
+
+ return ::basegfx::unotools::polyPolygonFromPoint2DSequenceSequence(
+ xLinePoly->getPoints( 0,
+ nPolys,
+ 0,
+ -1 ) );
+ }
+ }
+ }
+
+ void setupGraphics( Gdiplus::Graphics& rGraphics )
+ {
+ // setup graphics with (somewhat arbitrary) defaults
+ //rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighQuality );
+ rGraphics.SetCompositingQuality( Gdiplus::CompositingQualityHighSpeed );
+ //rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeHighQualityBilinear ); // with prefiltering for shrinks
+ rGraphics.SetInterpolationMode( Gdiplus::InterpolationModeBilinear );
+
+ // #122683# Switched precedence of pixel offset
+ // mode. Seemingly, polygon stroking needs
+ // PixelOffsetModeNone to achieve visually pleasing
+ // results, whereas all other operations (e.g. polygon
+ // fills, bitmaps) look better with PixelOffsetModeHalf.
+ rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeHalf ); // Pixel center at (0.5, 0.5) etc.
+ //rGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeNone );
+
+ //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighSpeed ); // no line/curve antialiasing
+ //rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeHighQuality );
+ rGraphics.SetSmoothingMode( Gdiplus::SmoothingModeAntiAlias );
+ //rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintAntiAlias );
+ rGraphics.SetTextRenderingHint( Gdiplus::TextRenderingHintSystemDefault );
+ rGraphics.SetPageUnit(Gdiplus::UnitPixel);
+ }
+
+ Gdiplus::Graphics* createGraphicsFromHDC(HDC aHDC)
+ {
+ Gdiplus::Graphics* pRet = new Gdiplus::Graphics(aHDC);
+ setupGraphics( *pRet );
+ return pRet;
+ }
+
+ Gdiplus::Graphics* createGraphicsFromBitmap(const BitmapSharedPtr& rBitmap)
+ {
+ Gdiplus::Graphics* pRet = Gdiplus::Graphics::FromImage(rBitmap.get());
+ if( pRet )
+ setupGraphics( *pRet );
+ return pRet;
+ }
+
+ void gdiPlusMatrixFromB2DHomMatrix( Gdiplus::Matrix& rGdiplusMatrix, const ::basegfx::B2DHomMatrix& rMatrix )
+ {
+ rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.get(0,0)),
+ static_cast<Gdiplus::REAL>(rMatrix.get(1,0)),
+ static_cast<Gdiplus::REAL>(rMatrix.get(0,1)),
+ static_cast<Gdiplus::REAL>(rMatrix.get(1,1)),
+ static_cast<Gdiplus::REAL>(rMatrix.get(0,2)),
+ static_cast<Gdiplus::REAL>(rMatrix.get(1,2)) );
+ }
+
+ void gdiPlusMatrixFromAffineMatrix2D( Gdiplus::Matrix& rGdiplusMatrix,
+ const geometry::AffineMatrix2D& rMatrix )
+ {
+ rGdiplusMatrix.SetElements( static_cast<Gdiplus::REAL>(rMatrix.m00),
+ static_cast<Gdiplus::REAL>(rMatrix.m10),
+ static_cast<Gdiplus::REAL>(rMatrix.m01),
+ static_cast<Gdiplus::REAL>(rMatrix.m11),
+ static_cast<Gdiplus::REAL>(rMatrix.m02),
+ static_cast<Gdiplus::REAL>(rMatrix.m12) );
+ }
+
+ namespace
+ {
+ // TODO(P2): Check whether this gets inlined. If not, make functor
+ // out of it
+ Gdiplus::PointF implGdiPlusPointFromRealPoint2D( const css::geometry::RealPoint2D& rPoint )
+ {
+ return Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.X),
+ static_cast<Gdiplus::REAL>(rPoint.Y) );
+ }
+
+ void graphicsPathFromB2DPolygon( GraphicsPathSharedPtr const & rOutput,
+ std::vector< Gdiplus::PointF >& rPoints,
+ const ::basegfx::B2DPolygon& rPoly,
+ bool bNoLineJoin)
+ {
+ const sal_uInt32 nPoints( rPoly.count() );
+
+ if( nPoints < 2 )
+ return;
+
+ rOutput->StartFigure();
+
+ const bool bClosedPolygon( rPoly.isClosed() );
+
+ if( rPoly.areControlPointsUsed() )
+ {
+ // control points used -> for now, add all
+ // segments as curves to GraphicsPath
+
+ // If the polygon is closed, we need to add the
+ // first point, thus, one more (can't simply
+ // GraphicsPath::CloseFigure() it, since the last
+ // point cannot have any control points for GDI+)
+ rPoints.resize( 3*nPoints + (bClosedPolygon ? 1 : 0) );
+
+ sal_uInt32 nCurrOutput=0;
+ for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
+ {
+ const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
+ rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
+ static_cast<Gdiplus::REAL>(rPoint.getY()) );
+
+ const ::basegfx::B2DPoint& rControlPointA( rPoly.getNextControlPoint( nCurrPoint ) );
+ rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointA.getX()),
+ static_cast<Gdiplus::REAL>(rControlPointA.getY()) );
+
+ const ::basegfx::B2DPoint& rControlPointB( rPoly.getPrevControlPoint( (nCurrPoint + 1) % nPoints) );
+ rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rControlPointB.getX()),
+ static_cast<Gdiplus::REAL>(rControlPointB.getY()) );
+ }
+
+ if( bClosedPolygon )
+ {
+ // add first point again (to be able to pass
+ // control points for the last point, see
+ // above)
+ const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint(0) );
+ rPoints[nCurrOutput++] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
+ static_cast<Gdiplus::REAL>(rPoint.getY()) );
+
+ if(bNoLineJoin && nCurrOutput > 7)
+ {
+ for(sal_uInt32 a(3); a < nCurrOutput; a+=3)
+ {
+ rOutput->StartFigure();
+ rOutput->AddBezier(rPoints[a - 3], rPoints[a - 2], rPoints[a - 1], rPoints[a]);
+ }
+ }
+ else
+ {
+ rOutput->AddBeziers( rPoints.data(), nCurrOutput );
+ }
+ }
+ else
+ {
+ // GraphicsPath expects 3(n-1)+1 points (i.e. the
+ // last point must not have any trailing control
+ // points after it).
+ // Therefore, simply don't pass the last two
+ // points here.
+ if( nCurrOutput > 3 )
+ {
+ if(bNoLineJoin && nCurrOutput > 7)
+ {
+ for(sal_uInt32 a(3); a < nCurrOutput; a+=3)
+ {
+ rOutput->StartFigure();
+ rOutput->AddBezier(rPoints[a - 3], rPoints[a - 2], rPoints[a - 1], rPoints[a]);
+ }
+ }
+ else
+ {
+ rOutput->AddBeziers( rPoints.data(), nCurrOutput-2 );
+ }
+ }
+ }
+ }
+ else
+ {
+ // no control points -> no curves, simply add
+ // straight lines to GraphicsPath
+ rPoints.resize( nPoints );
+
+ for( sal_uInt32 nCurrPoint=0; nCurrPoint<nPoints; ++nCurrPoint )
+ {
+ const ::basegfx::B2DPoint& rPoint( rPoly.getB2DPoint( nCurrPoint ) );
+ rPoints[nCurrPoint] = Gdiplus::PointF( static_cast<Gdiplus::REAL>(rPoint.getX()),
+ static_cast<Gdiplus::REAL>(rPoint.getY()) );
+ }
+
+ if(bNoLineJoin && nPoints > 2)
+ {
+ for(sal_uInt32 a(1); a < nPoints; a++)
+ {
+ rOutput->StartFigure();
+ rOutput->AddLine(rPoints[a - 1], rPoints[a]);
+ }
+
+ if(bClosedPolygon)
+ {
+ rOutput->StartFigure();
+ rOutput->AddLine(rPoints[nPoints - 1], rPoints[0]);
+ }
+ }
+ else
+ {
+ rOutput->AddLines( rPoints.data(), nPoints );
+ }
+ }
+
+ if( bClosedPolygon && !bNoLineJoin )
+ rOutput->CloseFigure();
+ }
+ }
+
+ Gdiplus::Rect gdiPlusRectFromIntegerRectangle2D( const geometry::IntegerRectangle2D& rRect )
+ {
+ return Gdiplus::Rect( rRect.X1,
+ rRect.Y1,
+ rRect.X2 - rRect.X1,
+ rRect.Y2 - rRect.Y1 );
+ }
+
+ Gdiplus::RectF gdiPlusRectFFromRectangle2D( const geometry::RealRectangle2D& rRect )
+ {
+ return Gdiplus::RectF( static_cast<Gdiplus::REAL>(rRect.X1),
+ static_cast<Gdiplus::REAL>(rRect.Y1),
+ static_cast<Gdiplus::REAL>(rRect.X2 - rRect.X1),
+ static_cast<Gdiplus::REAL>(rRect.Y2 - rRect.Y1) );
+ }
+
+ RECT gdiRectFromB2IRect( const ::basegfx::B2IRange& rRect )
+ {
+ RECT aRect = {rRect.getMinX(),
+ rRect.getMinY(),
+ rRect.getMaxX(),
+ rRect.getMaxY()};
+
+ return aRect;
+ }
+
+ geometry::RealPoint2D realPoint2DFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
+ {
+ return geometry::RealPoint2D( rPoint.X, rPoint.Y );
+ }
+
+ geometry::RealRectangle2D realRectangle2DFromGdiPlusRectF( const Gdiplus::RectF& rRect )
+ {
+ return geometry::RealRectangle2D( rRect.X, rRect.Y,
+ rRect.X + rRect.Width,
+ rRect.Y + rRect.Height );
+ }
+
+ ::basegfx::B2DPoint b2dPointFromGdiPlusPointF( const Gdiplus::PointF& rPoint )
+ {
+ return ::basegfx::B2DPoint( rPoint.X, rPoint.Y );
+ }
+
+ ::basegfx::B2DRange b2dRangeFromGdiPlusRectF( const Gdiplus::RectF& rRect )
+ {
+ return ::basegfx::B2DRange( rRect.X, rRect.Y,
+ rRect.X + rRect.Width,
+ rRect.Y + rRect.Height );
+ }
+
+ uno::Sequence< sal_Int8 > argbToIntSequence( Gdiplus::ARGB rColor )
+ {
+ // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
+ uno::Sequence< sal_Int8 > aRet(4);
+
+ aRet[0] = static_cast<sal_Int8>((rColor >> 16) & 0xFF); // red
+ aRet[1] = static_cast<sal_Int8>((rColor >> 8) & 0xFF); // green
+ aRet[2] = static_cast<sal_Int8>(rColor & 0xFF); // blue
+ aRet[3] = static_cast<sal_Int8>((rColor >> 24) & 0xFF); // alpha
+
+ return aRet;
+ }
+
+ Gdiplus::ARGB sequenceToArgb( const uno::Sequence< sal_Int8 >& rColor )
+ {
+ ENSURE_OR_THROW( rColor.getLength() > 2,
+ "sequenceToArgb: need at least three channels" );
+
+ // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
+ Gdiplus::ARGB aColor;
+
+ aColor = (static_cast<sal_uInt8>(rColor[0]) << 16) | (static_cast<sal_uInt8>(rColor[1]) << 8) | static_cast<sal_uInt8>(rColor[2]);
+
+ if( rColor.getLength() > 3 )
+ aColor |= static_cast<sal_uInt8>(rColor[3]) << 24;
+
+ return aColor;
+ }
+
+ Gdiplus::ARGB sequenceToArgb( const uno::Sequence< double >& rColor )
+ {
+ ENSURE_OR_THROW( rColor.getLength() > 2,
+ "sequenceToColor: need at least three channels" );
+
+ // TODO(F1): handle color space conversions, when defined on canvas/graphicDevice
+ Gdiplus::ARGB aColor;
+
+ ::canvas::tools::verifyRange(rColor[0],0.0,1.0);
+ ::canvas::tools::verifyRange(rColor[1],0.0,1.0);
+ ::canvas::tools::verifyRange(rColor[2],0.0,1.0);
+
+ aColor =
+ (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[0] ) ) << 16) |
+ (static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[1] ) ) << 8) |
+ static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[2] ) );
+
+ if( rColor.getLength() > 3 )
+ {
+ ::canvas::tools::verifyRange(rColor[3],0.0,1.0);
+ aColor |= static_cast<sal_uInt8>( ::basegfx::fround( 255*rColor[3] ) ) << 24;
+ }
+
+ return aColor;
+ }
+
+ GraphicsPathSharedPtr graphicsPathFromRealPoint2DSequence( const uno::Sequence< uno::Sequence< geometry::RealPoint2D > >& points )
+ {
+ GraphicsPathSharedPtr pRes = std::make_shared<Gdiplus::GraphicsPath>();
+ std::vector< Gdiplus::PointF > aPoints;
+
+ for( uno::Sequence< geometry::RealPoint2D > const & seqPoints : points )
+ {
+ const sal_Int32 nCurrSize( seqPoints.getLength() );
+ if( nCurrSize )
+ {
+ aPoints.resize( nCurrSize );
+
+ // TODO(F1): Closed/open polygons
+
+ // convert from RealPoint2D array to Gdiplus::PointF array
+ std::transform( seqPoints.getConstArray(),
+ seqPoints.getConstArray()+nCurrSize,
+ aPoints.begin(),
+ implGdiPlusPointFromRealPoint2D );
+
+ pRes->AddLines( aPoints.data(), nCurrSize );
+ }
+ }
+
+ return pRes;
+ }
+
+ GraphicsPathSharedPtr graphicsPathFromB2DPolygon( const ::basegfx::B2DPolygon& rPoly, bool bNoLineJoin )
+ {
+ GraphicsPathSharedPtr pRes = std::make_shared<Gdiplus::GraphicsPath>();
+ std::vector< Gdiplus::PointF > aPoints;
+
+ graphicsPathFromB2DPolygon( pRes, aPoints, rPoly, bNoLineJoin );
+
+ return pRes;
+ }
+
+ GraphicsPathSharedPtr graphicsPathFromB2DPolyPolygon( const ::basegfx::B2DPolyPolygon& rPoly, bool bNoLineJoin )
+ {
+ GraphicsPathSharedPtr pRes = std::make_shared<Gdiplus::GraphicsPath>();
+ std::vector< Gdiplus::PointF > aPoints;
+
+ const sal_uInt32 nPolies( rPoly.count() );
+ for( sal_uInt32 nCurrPoly=0; nCurrPoly<nPolies; ++nCurrPoly )
+ {
+ graphicsPathFromB2DPolygon( pRes,
+ aPoints,
+ rPoly.getB2DPolygon( nCurrPoly ),
+ bNoLineJoin);
+ }
+
+ return pRes;
+ }
+
+ GraphicsPathSharedPtr graphicsPathFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly, bool bNoLineJoin )
+ {
+ LinePolyPolygon* pPolyImpl = dynamic_cast< LinePolyPolygon* >( xPoly.get() );
+
+ if( pPolyImpl )
+ {
+ return pPolyImpl->getGraphicsPath( bNoLineJoin );
+ }
+ else
+ {
+ return tools::graphicsPathFromB2DPolyPolygon(
+ polyPolygonFromXPolyPolygon2D( xPoly ), bNoLineJoin );
+ }
+ }
+
+ bool drawGdiPlusBitmap( const GraphicsSharedPtr& rGraphics,
+ const BitmapSharedPtr& rBitmap )
+ {
+ Gdiplus::PointF aPoint;
+ return (Gdiplus::Ok == rGraphics->DrawImage( rBitmap.get(),
+ aPoint ) );
+ }
+
+ bool drawDIBits( const std::shared_ptr<Gdiplus::Graphics>& rGraphics,
+ const BITMAPINFO& rBI,
+ const void* pBits )
+ {
+ BitmapSharedPtr pBitmap(
+ Gdiplus::Bitmap::FromBITMAPINFO( &rBI,
+ const_cast<void*>(pBits) ) );
+
+ return drawGdiPlusBitmap( rGraphics,
+ pBitmap );
+ }
+
+ bool drawRGBABits( const std::shared_ptr<Gdiplus::Graphics>& rGraphics,
+ const RawRGBABitmap& rRawRGBAData )
+ {
+ BitmapSharedPtr pBitmap = std::make_shared<Gdiplus::Bitmap>( rRawRGBAData.mnWidth,
+ rRawRGBAData.mnHeight,
+ PixelFormat32bppARGB );
+
+ Gdiplus::BitmapData aBmpData;
+ aBmpData.Width = rRawRGBAData.mnWidth;
+ aBmpData.Height = rRawRGBAData.mnHeight;
+ aBmpData.Stride = 4*aBmpData.Width; // bottom-up format
+ aBmpData.PixelFormat = PixelFormat32bppARGB;
+ aBmpData.Scan0 = const_cast<sal_uInt8*>(rRawRGBAData.maBitmapData.data());
+
+ const Gdiplus::Rect aRect( 0,0,aBmpData.Width,aBmpData.Height );
+ if( Gdiplus::Ok != pBitmap->LockBits( &aRect,
+ Gdiplus::ImageLockModeWrite | Gdiplus::ImageLockModeUserInputBuf,
+ PixelFormat32bppARGB,
+ &aBmpData ) )
+ {
+ return false;
+ }
+
+ // commit data to bitmap
+ pBitmap->UnlockBits( &aBmpData );
+
+ return drawGdiPlusBitmap( rGraphics,
+ pBitmap );
+ }
+
+ BitmapSharedPtr bitmapFromXBitmap( const uno::Reference< rendering::XBitmap >& xBitmap )
+ {
+ BitmapProvider* pBitmapProvider = dynamic_cast< BitmapProvider* >(xBitmap.get());
+
+ if( pBitmapProvider )
+ {
+ IBitmapSharedPtr pBitmap( pBitmapProvider->getBitmap() );
+ return pBitmap->getBitmap();
+ }
+ else
+ {
+ // not a native CanvasBitmap, extract VCL bitmap and
+ // render into GDI+ bitmap of similar size
+ // =================================================
+
+ const geometry::IntegerSize2D aBmpSize( xBitmap->getSize() );
+ BitmapSharedPtr pBitmap;
+
+ if( xBitmap->hasAlpha() )
+ {
+ // TODO(P2): At least for the alpha bitmap case, it
+ // would be possible to generate the corresponding
+ // bitmap directly
+ pBitmap = std::make_shared<Gdiplus::Bitmap>( aBmpSize.Width,
+ aBmpSize.Height,
+ PixelFormat32bppARGB );
+ }
+ else
+ {
+ // TODO(F2): Might be wise to create bitmap compatible
+ // to the VCL bitmap. Also, check whether the VCL
+ // bitmap's system handles can be used to create the
+ // GDI+ bitmap (currently, it does not seem so).
+ pBitmap = std::make_shared<Gdiplus::Bitmap>( aBmpSize.Width,
+ aBmpSize.Height,
+ PixelFormat24bppRGB );
+ }
+
+ GraphicsSharedPtr pGraphics(createGraphicsFromBitmap(pBitmap));
+ tools::setupGraphics(*pGraphics);
+ if( !drawVCLBitmapFromXBitmap(
+ pGraphics,
+ xBitmap) )
+ {
+ pBitmap.reset();
+ }
+
+ return pBitmap;
+ }
+ }
+
+ CanvasFont::ImplRef canvasFontFromXFont( const uno::Reference< rendering::XCanvasFont >& xFont )
+ {
+ CanvasFont* pCanvasFont = dynamic_cast< CanvasFont* >(xFont.get());
+
+ ENSURE_ARG_OR_THROW( pCanvasFont,
+ "canvasFontFromXFont(): Invalid XFont (or incompatible font for this XCanvas)" );
+
+ return CanvasFont::ImplRef( pCanvasFont );
+ }
+
+ void setModulateImageAttributes( Gdiplus::ImageAttributes& o_rAttr,
+ double nRedModulation,
+ double nGreenModulation,
+ double nBlueModulation,
+ double nAlphaModulation )
+ {
+ // This gets rather verbose, but we have to setup a color
+ // transformation matrix, in order to incorporate the global
+ // alpha value mfAlpha into the bitmap rendering.
+ Gdiplus::ColorMatrix aColorMatrix;
+
+ aColorMatrix.m[0][0] = static_cast<Gdiplus::REAL>(nRedModulation);
+ aColorMatrix.m[0][1] = 0.0;
+ aColorMatrix.m[0][2] = 0.0;
+ aColorMatrix.m[0][3] = 0.0;
+ aColorMatrix.m[0][4] = 0.0;
+
+ aColorMatrix.m[1][0] = 0.0;
+ aColorMatrix.m[1][1] = static_cast<Gdiplus::REAL>(nGreenModulation);
+ aColorMatrix.m[1][2] = 0.0;
+ aColorMatrix.m[1][3] = 0.0;
+ aColorMatrix.m[1][4] = 0.0;
+
+ aColorMatrix.m[2][0] = 0.0;
+ aColorMatrix.m[2][1] = 0.0;
+ aColorMatrix.m[2][2] = static_cast<Gdiplus::REAL>(nBlueModulation);
+ aColorMatrix.m[2][3] = 0.0;
+ aColorMatrix.m[2][4] = 0.0;
+
+ aColorMatrix.m[3][0] = 0.0;
+ aColorMatrix.m[3][1] = 0.0;
+ aColorMatrix.m[3][2] = 0.0;
+ aColorMatrix.m[3][3] = static_cast<Gdiplus::REAL>(nAlphaModulation);
+ aColorMatrix.m[3][4] = 0.0;
+
+ aColorMatrix.m[4][0] = 0.0;
+ aColorMatrix.m[4][1] = 0.0;
+ aColorMatrix.m[4][2] = 0.0;
+ aColorMatrix.m[4][3] = 0.0;
+ aColorMatrix.m[4][4] = 1.0;
+
+ o_rAttr.SetColorMatrix( &aColorMatrix );
+ }
+
+ } // namespace tools
+} // namespace dxcanvas
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 06:54:43 +0000