| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_slideshow.hxx" |
| |
| // must be first |
| #include <canvas/debug.hxx> |
| #include <expressionnodefactory.hxx> |
| |
| #include <canvas/verbosetrace.hxx> |
| |
| #include <basegfx/matrix/b2dhommatrix.hxx> |
| #include <basegfx/point/b2dpoint.hxx> |
| |
| #include <functional> |
| #include <algorithm> |
| |
| |
| /* Implementation of ExpressionNodeFactory class */ |
| |
| namespace slideshow |
| { |
| namespace internal |
| { |
| namespace |
| { |
| class ConstantValueExpression : public ExpressionNode |
| { |
| public: |
| ConstantValueExpression( double rValue ) : |
| maValue( rValue ) |
| { |
| } |
| |
| virtual double operator()( double /*t*/ ) const |
| { |
| return maValue; |
| } |
| |
| virtual bool isConstant() const |
| { |
| return true; |
| } |
| |
| private: |
| double maValue; |
| }; |
| |
| class TValueExpression : public ExpressionNode |
| { |
| public: |
| TValueExpression() |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return t; |
| } |
| |
| virtual bool isConstant() const |
| { |
| return false; |
| } |
| }; |
| |
| /** Base class for following binary functions (*+-/) |
| |
| Does not pay off to have all this as a template, since |
| we'd have to hold the functor as a member (+33% object |
| size). |
| */ |
| class BinaryExpressionBase : public ExpressionNode |
| { |
| public: |
| BinaryExpressionBase( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| mpFirstArg( rFirstArg ), |
| mpSecondArg( rSecondArg ) |
| { |
| } |
| |
| virtual bool isConstant() const |
| { |
| return |
| mpFirstArg->isConstant() && |
| mpSecondArg->isConstant(); |
| } |
| |
| protected: |
| ExpressionNodeSharedPtr mpFirstArg; |
| ExpressionNodeSharedPtr mpSecondArg; |
| }; |
| |
| class PlusExpression : public BinaryExpressionBase |
| { |
| public: |
| PlusExpression( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| BinaryExpressionBase( rFirstArg, rSecondArg ) |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return (*mpFirstArg)(t) + (*mpSecondArg)(t); |
| } |
| }; |
| |
| class MinusExpression : public BinaryExpressionBase |
| { |
| public: |
| MinusExpression( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| BinaryExpressionBase( rFirstArg, rSecondArg ) |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return (*mpFirstArg)(t) - (*mpSecondArg)(t); |
| } |
| }; |
| |
| class MultipliesExpression : public BinaryExpressionBase |
| { |
| public: |
| MultipliesExpression( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| BinaryExpressionBase( rFirstArg, rSecondArg ) |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return (*mpFirstArg)(t) * (*mpSecondArg)(t); |
| } |
| }; |
| |
| class DividesExpression : public BinaryExpressionBase |
| { |
| public: |
| DividesExpression( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| BinaryExpressionBase( rFirstArg, rSecondArg ) |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return (*mpFirstArg)(t) / (*mpSecondArg)(t); |
| } |
| }; |
| |
| class ComposedExpression : public BinaryExpressionBase |
| { |
| public: |
| ComposedExpression( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| BinaryExpressionBase( rFirstArg, rSecondArg ) |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return (*mpFirstArg)( (*mpSecondArg)(t) ); |
| } |
| }; |
| |
| class MinExpression : public BinaryExpressionBase |
| { |
| public: |
| MinExpression( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| BinaryExpressionBase( rFirstArg, rSecondArg ) |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return ::std::min( (*mpFirstArg)(t), (*mpSecondArg)(t) ); |
| } |
| }; |
| |
| class MaxExpression : public BinaryExpressionBase |
| { |
| public: |
| MaxExpression( const ExpressionNodeSharedPtr& rFirstArg, |
| const ExpressionNodeSharedPtr& rSecondArg ) : |
| BinaryExpressionBase( rFirstArg, rSecondArg ) |
| { |
| } |
| |
| virtual double operator()( double t ) const |
| { |
| return ::std::max( (*mpFirstArg)(t), (*mpSecondArg)(t) ); |
| } |
| }; |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createConstantValueExpression( double rConstantValue ) |
| { |
| return ExpressionNodeSharedPtr( new ConstantValueExpression(rConstantValue) ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createValueTExpression() |
| { |
| return ExpressionNodeSharedPtr( new TValueExpression() ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createPlusExpression( const ExpressionNodeSharedPtr& rLHS, |
| const ExpressionNodeSharedPtr& rRHS ) |
| { |
| return ExpressionNodeSharedPtr( new PlusExpression(rLHS, rRHS) ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createMinusExpression( const ExpressionNodeSharedPtr& rLHS, |
| const ExpressionNodeSharedPtr& rRHS ) |
| { |
| return ExpressionNodeSharedPtr( new MinusExpression(rLHS, rRHS) ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createMultipliesExpression( const ExpressionNodeSharedPtr& rLHS, |
| const ExpressionNodeSharedPtr& rRHS ) |
| { |
| return ExpressionNodeSharedPtr( new MultipliesExpression(rLHS, rRHS) ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createDividesExpression( const ExpressionNodeSharedPtr& rLHS, |
| const ExpressionNodeSharedPtr& rRHS ) |
| { |
| return ExpressionNodeSharedPtr( new DividesExpression(rLHS, rRHS) ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createComposedExpression ( const ExpressionNodeSharedPtr& rOuterFunction, |
| const ExpressionNodeSharedPtr& rInnerFunction ) |
| { |
| return ExpressionNodeSharedPtr( new ComposedExpression(rOuterFunction, rInnerFunction) ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createMinExpression ( const ExpressionNodeSharedPtr& rOuterFunction, |
| const ExpressionNodeSharedPtr& rInnerFunction ) |
| { |
| return ExpressionNodeSharedPtr( new MinExpression(rOuterFunction, rInnerFunction) ); |
| } |
| |
| ExpressionNodeSharedPtr ExpressionNodeFactory::createMaxExpression ( const ExpressionNodeSharedPtr& rOuterFunction, |
| const ExpressionNodeSharedPtr& rInnerFunction ) |
| { |
| return ExpressionNodeSharedPtr( new MaxExpression(rOuterFunction, rInnerFunction) ); |
| } |
| |
| } |
| } |