| // Copyright 2017 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #ifndef CORE_FPDFAPI_PAGE_CPDF_FUNCTION_H_ |
| #define CORE_FPDFAPI_PAGE_CPDF_FUNCTION_H_ |
| |
| #include <memory> |
| #include <set> |
| |
| class CPDF_ExpIntFunc; |
| class CPDF_Object; |
| class CPDF_SampledFunc; |
| class CPDF_StitchFunc; |
| |
| class CPDF_Function { |
| public: |
| enum class Type { |
| kTypeInvalid = -1, |
| kType0Sampled = 0, |
| kType2ExpotentialInterpolation = 2, |
| kType3Stitching = 3, |
| kType4PostScript = 4, |
| }; |
| |
| static std::unique_ptr<CPDF_Function> Load(const CPDF_Object* pFuncObj); |
| static Type IntegerToFunctionType(int iType); |
| |
| virtual ~CPDF_Function(); |
| |
| bool Call(const float* inputs, |
| uint32_t ninputs, |
| float* results, |
| int* nresults) const; |
| uint32_t CountInputs() const { return m_nInputs; } |
| uint32_t CountOutputs() const { return m_nOutputs; } |
| float GetDomain(int i) const { return m_pDomains[i]; } |
| float GetRange(int i) const { return m_pRanges[i]; } |
| float Interpolate(float x, |
| float xmin, |
| float xmax, |
| float ymin, |
| float ymax) const; |
| |
| const CPDF_SampledFunc* ToSampledFunc() const; |
| const CPDF_ExpIntFunc* ToExpIntFunc() const; |
| const CPDF_StitchFunc* ToStitchFunc() const; |
| |
| protected: |
| explicit CPDF_Function(Type type); |
| |
| static std::unique_ptr<CPDF_Function> Load( |
| const CPDF_Object* pFuncObj, |
| std::set<const CPDF_Object*>* pVisited); |
| bool Init(const CPDF_Object* pObj, std::set<const CPDF_Object*>* pVisited); |
| virtual bool v_Init(const CPDF_Object* pObj, |
| std::set<const CPDF_Object*>* pVisited) = 0; |
| virtual bool v_Call(const float* inputs, float* results) const = 0; |
| |
| uint32_t m_nInputs; |
| uint32_t m_nOutputs; |
| float* m_pDomains; |
| float* m_pRanges; |
| |
| private: |
| const Type m_Type; |
| }; |
| |
| #endif // CORE_FPDFAPI_PAGE_CPDF_FUNCTION_H_ |