04d937c1ec
linear gradients in VCL renderers Patch by: Regina Review by: alg (cherry picked from commit 94205034afa2abe9ab73b2f5d0c76f295a7889c9) Conflicts: vcl/source/gdi/outdev4.cxx Change-Id: I8b66bb1b9155253e138c7ebb4fc3e0686bae7913
359 lines
11 KiB
C++
359 lines
11 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 <tools/stream.hxx>
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#include <tools/vcompat.hxx>
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#include <tools/debug.hxx>
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#include <tools/gen.hxx>
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#include <vcl/gradient.hxx>
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DBG_NAME( Gradient )
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Impl_Gradient::Impl_Gradient() :
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maStartColor( COL_BLACK ),
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maEndColor( COL_WHITE )
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{
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mnRefCount = 1;
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meStyle = GradientStyle_LINEAR;
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mnAngle = 0;
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mnBorder = 0;
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mnOfsX = 50;
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mnOfsY = 50;
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mnIntensityStart = 100;
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mnIntensityEnd = 100;
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mnStepCount = 0;
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}
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Impl_Gradient::Impl_Gradient( const Impl_Gradient& rImplGradient ) :
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maStartColor( rImplGradient.maStartColor ),
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maEndColor( rImplGradient.maEndColor )
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{
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mnRefCount = 1;
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meStyle = rImplGradient.meStyle;
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mnAngle = rImplGradient.mnAngle;
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mnBorder = rImplGradient.mnBorder;
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mnOfsX = rImplGradient.mnOfsX;
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mnOfsY = rImplGradient.mnOfsY;
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mnIntensityStart = rImplGradient.mnIntensityStart;
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mnIntensityEnd = rImplGradient.mnIntensityEnd;
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mnStepCount = rImplGradient.mnStepCount;
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}
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void Gradient::MakeUnique()
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{
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// If there are still other references, copy
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if ( mpImplGradient->mnRefCount != 1 )
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{
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if( mpImplGradient->mnRefCount )
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mpImplGradient->mnRefCount--;
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mpImplGradient = new Impl_Gradient( *mpImplGradient );
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}
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}
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Gradient::Gradient()
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{
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DBG_CTOR( Gradient, NULL );
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mpImplGradient = new Impl_Gradient;
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}
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Gradient::Gradient( const Gradient& rGradient )
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{
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DBG_CTOR( Gradient, NULL );
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DBG_CHKOBJ( &rGradient, Gradient, NULL );
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// Take over instance data and increment refcount
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mpImplGradient = rGradient.mpImplGradient;
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mpImplGradient->mnRefCount++;
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}
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Gradient::Gradient( GradientStyle eStyle,
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const Color& rStartColor, const Color& rEndColor )
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{
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DBG_CTOR( Gradient, NULL );
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mpImplGradient = new Impl_Gradient;
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mpImplGradient->meStyle = eStyle;
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mpImplGradient->maStartColor = rStartColor;
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mpImplGradient->maEndColor = rEndColor;
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}
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Gradient::~Gradient()
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{
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DBG_DTOR( Gradient, NULL );
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// If it's the last reference, delete it, otherwise
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// decrement refcount
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if ( mpImplGradient->mnRefCount == 1 )
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delete mpImplGradient;
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else
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mpImplGradient->mnRefCount--;
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}
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void Gradient::SetStyle( GradientStyle eStyle )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->meStyle = eStyle;
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}
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void Gradient::SetStartColor( const Color& rColor )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->maStartColor = rColor;
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}
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void Gradient::SetEndColor( const Color& rColor )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->maEndColor = rColor;
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}
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void Gradient::SetAngle( sal_uInt16 nAngle )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->mnAngle = nAngle;
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}
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void Gradient::SetBorder( sal_uInt16 nBorder )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->mnBorder = nBorder;
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}
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void Gradient::SetOfsX( sal_uInt16 nOfsX )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->mnOfsX = nOfsX;
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}
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void Gradient::SetOfsY( sal_uInt16 nOfsY )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->mnOfsY = nOfsY;
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}
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void Gradient::SetStartIntensity( sal_uInt16 nIntens )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->mnIntensityStart = nIntens;
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}
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void Gradient::SetEndIntensity( sal_uInt16 nIntens )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->mnIntensityEnd = nIntens;
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}
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void Gradient::SetSteps( sal_uInt16 nSteps )
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{
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DBG_CHKTHIS( Gradient, NULL );
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MakeUnique();
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mpImplGradient->mnStepCount = nSteps;
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}
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void Gradient::GetBoundRect( const Rectangle& rRect, Rectangle& rBoundRect, Point& rCenter ) const
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{
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Rectangle aRect( rRect );
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sal_uInt16 nAngle = GetAngle() % 3600;
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if( GetStyle() == GradientStyle_LINEAR || GetStyle() == GradientStyle_AXIAL )
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{
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const double fAngle = nAngle * F_PI1800;
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const double fWidth = aRect.GetWidth();
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const double fHeight = aRect.GetHeight();
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double fDX = fWidth * fabs( cos( fAngle ) ) +
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fHeight * fabs( sin( fAngle ) );
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double fDY = fHeight * fabs( cos( fAngle ) ) +
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fWidth * fabs( sin( fAngle ) );
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fDX = (fDX - fWidth) * 0.5 + 0.5;
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fDY = (fDY - fHeight) * 0.5 + 0.5;
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aRect.Left() -= (long) fDX;
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aRect.Right() += (long) fDX;
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aRect.Top() -= (long) fDY;
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aRect.Bottom() += (long) fDY;
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rBoundRect = aRect;
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rCenter = rRect.Center();
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}
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else
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{
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if( GetStyle() == GradientStyle_SQUARE || GetStyle() == GradientStyle_RECT )
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{
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const double fAngle = nAngle * F_PI1800;
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const double fWidth = aRect.GetWidth();
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const double fHeight = aRect.GetHeight();
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double fDX = fWidth * fabs( cos( fAngle ) ) + fHeight * fabs( sin( fAngle ) );
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double fDY = fHeight * fabs( cos( fAngle ) ) + fWidth * fabs( sin( fAngle ) );
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fDX = ( fDX - fWidth ) * 0.5 + 0.5;
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fDY = ( fDY - fHeight ) * 0.5 + 0.5;
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aRect.Left() -= (long) fDX;
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aRect.Right() += (long) fDX;
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aRect.Top() -= (long) fDY;
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aRect.Bottom() += (long) fDY;
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}
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Size aSize( aRect.GetSize() );
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if( GetStyle() == GradientStyle_RADIAL )
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{
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// Calculation of radii for circle
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aSize.Width() = (long)(0.5 + sqrt((double)aSize.Width()*(double)aSize.Width() + (double)aSize.Height()*(double)aSize.Height()));
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aSize.Height() = aSize.Width();
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}
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else if( GetStyle() == GradientStyle_ELLIPTICAL )
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{
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// Calculation of radii for ellipse
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aSize.Width() = (long)( 0.5 + (double) aSize.Width() * 1.4142 );
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aSize.Height() = (long)( 0.5 + (double) aSize.Height() * 1.4142 );
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}
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// Calculate new centers
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long nZWidth = aRect.GetWidth() * (long) GetOfsX() / 100;
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long nZHeight = aRect.GetHeight() * (long) GetOfsY() / 100;
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long nBorderX = (long) GetBorder() * aSize.Width() / 100;
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long nBorderY = (long) GetBorder() * aSize.Height() / 100;
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rCenter = Point( aRect.Left() + nZWidth, aRect.Top() + nZHeight );
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// Respect borders
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aSize.Width() -= nBorderX;
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aSize.Height() -= nBorderY;
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// Recalculate output rectangle
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aRect.Left() = rCenter.X() - ( aSize.Width() >> 1 );
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aRect.Top() = rCenter.Y() - ( aSize.Height() >> 1 );
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aRect.SetSize( aSize );
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rBoundRect = aRect;
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}
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}
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Gradient& Gradient::operator=( const Gradient& rGradient )
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{
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DBG_CHKTHIS( Gradient, NULL );
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DBG_CHKOBJ( &rGradient, Gradient, NULL );
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// Increment refcount first so that we can reference ourselves
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rGradient.mpImplGradient->mnRefCount++;
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// If it's the last reference, delete it, otherwise decrement
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if ( mpImplGradient->mnRefCount == 1 )
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delete mpImplGradient;
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else
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mpImplGradient->mnRefCount--;
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mpImplGradient = rGradient.mpImplGradient;
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return *this;
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}
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sal_Bool Gradient::operator==( const Gradient& rGradient ) const
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{
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DBG_CHKTHIS( Gradient, NULL );
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DBG_CHKOBJ( &rGradient, Gradient, NULL );
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if ( mpImplGradient == rGradient.mpImplGradient )
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return sal_True;
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if ( (mpImplGradient->meStyle == rGradient.mpImplGradient->meStyle) &&
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(mpImplGradient->mnAngle == rGradient.mpImplGradient->mnAngle) &&
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(mpImplGradient->mnBorder == rGradient.mpImplGradient->mnBorder) &&
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(mpImplGradient->mnOfsX == rGradient.mpImplGradient->mnOfsX) &&
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(mpImplGradient->mnOfsY == rGradient.mpImplGradient->mnOfsY) &&
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(mpImplGradient->mnStepCount == rGradient.mpImplGradient->mnStepCount) &&
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(mpImplGradient->mnIntensityStart == rGradient.mpImplGradient->mnIntensityStart) &&
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(mpImplGradient->mnIntensityEnd == rGradient.mpImplGradient->mnIntensityEnd) &&
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(mpImplGradient->maStartColor == rGradient.mpImplGradient->maStartColor) &&
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(mpImplGradient->maEndColor == rGradient.mpImplGradient->maEndColor) )
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return sal_True;
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else
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return sal_False;
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}
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SvStream& operator>>( SvStream& rIStm, Impl_Gradient& rImpl_Gradient )
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{
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VersionCompat aCompat( rIStm, STREAM_READ );
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sal_uInt16 nTmp16;
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rIStm >> nTmp16; rImpl_Gradient.meStyle = (GradientStyle) nTmp16;
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rIStm >> rImpl_Gradient.maStartColor >>
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rImpl_Gradient.maEndColor >>
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rImpl_Gradient.mnAngle >>
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rImpl_Gradient.mnBorder >>
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rImpl_Gradient.mnOfsX >>
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rImpl_Gradient.mnOfsY >>
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rImpl_Gradient.mnIntensityStart >>
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rImpl_Gradient.mnIntensityEnd >>
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rImpl_Gradient.mnStepCount;
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return rIStm;
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}
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SvStream& operator<<( SvStream& rOStm, const Impl_Gradient& rImpl_Gradient )
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{
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VersionCompat aCompat( rOStm, STREAM_WRITE, 1 );
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rOStm << (sal_uInt16) rImpl_Gradient.meStyle <<
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rImpl_Gradient.maStartColor <<
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rImpl_Gradient.maEndColor <<
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rImpl_Gradient.mnAngle <<
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rImpl_Gradient.mnBorder <<
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rImpl_Gradient.mnOfsX <<
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rImpl_Gradient.mnOfsY <<
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rImpl_Gradient.mnIntensityStart <<
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rImpl_Gradient.mnIntensityEnd <<
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rImpl_Gradient.mnStepCount;
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return rOStm;
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}
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SvStream& operator>>( SvStream& rIStm, Gradient& rGradient )
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{
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rGradient.MakeUnique();
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return( rIStm >> *rGradient.mpImplGradient );
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}
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SvStream& operator<<( SvStream& rOStm, const Gradient& rGradient )
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{
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return( rOStm << *rGradient.mpImplGradient );
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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