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1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 
7 #ifndef CORE_FPDFAPI_PAGE_PAGEINT_H_
8 #define CORE_FPDFAPI_PAGE_PAGEINT_H_
9 
10 #include <memory>
11 #include <vector>
12 
13 #include "core/fpdfapi/page/cpdf_colorspace.h"
14 #include "core/fpdfapi/page/cpdf_countedobject.h"
15 
16 class CPDF_ExpIntFunc;
17 class CPDF_Pattern;
18 class CPDF_SampledFunc;
19 class CPDF_StitchFunc;
20 class CPDF_StreamAcc;
21 
22 class CPDF_Function {
23  public:
24   enum class Type {
25     kTypeInvalid = -1,
26     kType0Sampled = 0,
27     kType2ExpotentialInterpolation = 2,
28     kType3Stitching = 3,
29     kType4PostScript = 4,
30   };
31 
32   static std::unique_ptr<CPDF_Function> Load(CPDF_Object* pFuncObj);
33   static Type IntegerToFunctionType(int iType);
34 
35   virtual ~CPDF_Function();
36   bool Call(FX_FLOAT* inputs,
37             uint32_t ninputs,
38             FX_FLOAT* results,
39             int& nresults) const;
CountInputs()40   uint32_t CountInputs() const { return m_nInputs; }
CountOutputs()41   uint32_t CountOutputs() const { return m_nOutputs; }
GetDomain(int i)42   FX_FLOAT GetDomain(int i) const { return m_pDomains[i]; }
GetRange(int i)43   FX_FLOAT GetRange(int i) const { return m_pRanges[i]; }
44 
45   const CPDF_SampledFunc* ToSampledFunc() const;
46   const CPDF_ExpIntFunc* ToExpIntFunc() const;
47   const CPDF_StitchFunc* ToStitchFunc() const;
48 
49  protected:
50   explicit CPDF_Function(Type type);
51 
52   bool Init(CPDF_Object* pObj);
53   virtual bool v_Init(CPDF_Object* pObj) = 0;
54   virtual bool v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const = 0;
55 
56   uint32_t m_nInputs;
57   uint32_t m_nOutputs;
58   FX_FLOAT* m_pDomains;
59   FX_FLOAT* m_pRanges;
60   const Type m_Type;
61 };
62 
63 class CPDF_ExpIntFunc : public CPDF_Function {
64  public:
65   CPDF_ExpIntFunc();
66   ~CPDF_ExpIntFunc() override;
67 
68   // CPDF_Function
69   bool v_Init(CPDF_Object* pObj) override;
70   bool v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override;
71 
72   uint32_t m_nOrigOutputs;
73   FX_FLOAT m_Exponent;
74   FX_FLOAT* m_pBeginValues;
75   FX_FLOAT* m_pEndValues;
76 };
77 
78 class CPDF_SampledFunc : public CPDF_Function {
79  public:
80   struct SampleEncodeInfo {
81     FX_FLOAT encode_max;
82     FX_FLOAT encode_min;
83     uint32_t sizes;
84   };
85 
86   struct SampleDecodeInfo {
87     FX_FLOAT decode_max;
88     FX_FLOAT decode_min;
89   };
90 
91   CPDF_SampledFunc();
92   ~CPDF_SampledFunc() override;
93 
94   // CPDF_Function
95   bool v_Init(CPDF_Object* pObj) override;
96   bool v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override;
97 
GetEncodeInfo()98   const std::vector<SampleEncodeInfo>& GetEncodeInfo() const {
99     return m_EncodeInfo;
100   }
GetBitsPerSample()101   uint32_t GetBitsPerSample() const { return m_nBitsPerSample; }
GetSampleStream()102   const CPDF_StreamAcc* GetSampleStream() const {
103     return m_pSampleStream.get();
104   }
105 
106  private:
107   std::vector<SampleEncodeInfo> m_EncodeInfo;
108   std::vector<SampleDecodeInfo> m_DecodeInfo;
109   uint32_t m_nBitsPerSample;
110   uint32_t m_SampleMax;
111   std::unique_ptr<CPDF_StreamAcc> m_pSampleStream;
112 };
113 
114 class CPDF_StitchFunc : public CPDF_Function {
115  public:
116   CPDF_StitchFunc();
117   ~CPDF_StitchFunc() override;
118 
119   // CPDF_Function
120   bool v_Init(CPDF_Object* pObj) override;
121   bool v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override;
122 
GetSubFunctions()123   const std::vector<std::unique_ptr<CPDF_Function>>& GetSubFunctions() const {
124     return m_pSubFunctions;
125   }
GetBound(size_t i)126   FX_FLOAT GetBound(size_t i) const { return m_pBounds[i]; }
127 
128  private:
129   std::vector<std::unique_ptr<CPDF_Function>> m_pSubFunctions;
130   FX_FLOAT* m_pBounds;
131   FX_FLOAT* m_pEncode;
132 
133   static const uint32_t kRequiredNumInputs = 1;
134 };
135 
136 class CPDF_IccProfile {
137  public:
138   CPDF_IccProfile(const uint8_t* pData, uint32_t dwSize);
139   ~CPDF_IccProfile();
GetComponents()140   uint32_t GetComponents() const { return m_nSrcComponents; }
141   bool m_bsRGB;
142   void* m_pTransform;
143 
144  private:
145   uint32_t m_nSrcComponents;
146 };
147 
148 class CPDF_DeviceCS : public CPDF_ColorSpace {
149  public:
150   CPDF_DeviceCS(CPDF_Document* pDoc, int family);
151 
152   bool GetRGB(FX_FLOAT* pBuf,
153               FX_FLOAT& R,
154               FX_FLOAT& G,
155               FX_FLOAT& B) const override;
156   bool SetRGB(FX_FLOAT* pBuf,
157               FX_FLOAT R,
158               FX_FLOAT G,
159               FX_FLOAT B) const override;
160   bool v_GetCMYK(FX_FLOAT* pBuf,
161                  FX_FLOAT& c,
162                  FX_FLOAT& m,
163                  FX_FLOAT& y,
164                  FX_FLOAT& k) const override;
165   bool v_SetCMYK(FX_FLOAT* pBuf,
166                  FX_FLOAT c,
167                  FX_FLOAT m,
168                  FX_FLOAT y,
169                  FX_FLOAT k) const override;
170   void TranslateImageLine(uint8_t* pDestBuf,
171                           const uint8_t* pSrcBuf,
172                           int pixels,
173                           int image_width,
174                           int image_height,
175                           bool bTransMask = false) const override;
176 };
177 
178 class CPDF_PatternCS : public CPDF_ColorSpace {
179  public:
180   explicit CPDF_PatternCS(CPDF_Document* pDoc);
181   ~CPDF_PatternCS() override;
182   bool v_Load(CPDF_Document* pDoc, CPDF_Array* pArray) override;
183   bool GetRGB(FX_FLOAT* pBuf,
184               FX_FLOAT& R,
185               FX_FLOAT& G,
186               FX_FLOAT& B) const override;
187   CPDF_ColorSpace* GetBaseCS() const override;
188 
189  private:
190   CPDF_ColorSpace* m_pBaseCS;
191   CPDF_CountedColorSpace* m_pCountedBaseCS;
192 };
193 
194 #define MAX_PATTERN_COLORCOMPS 16
195 struct PatternValue {
196   CPDF_Pattern* m_pPattern;
197   CPDF_CountedPattern* m_pCountedPattern;
198   int m_nComps;
199   FX_FLOAT m_Comps[MAX_PATTERN_COLORCOMPS];
200 };
201 
202 CFX_ByteStringC PDF_FindKeyAbbreviationForTesting(const CFX_ByteStringC& abbr);
203 CFX_ByteStringC PDF_FindValueAbbreviationForTesting(
204     const CFX_ByteStringC& abbr);
205 
206 #endif  // CORE_FPDFAPI_PAGE_PAGEINT_H_
207