1 // Copyright 2016 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_CPDF_PSENGINE_H_ 8 #define CORE_FPDFAPI_PAGE_CPDF_PSENGINE_H_ 9 10 #include <memory> 11 #include <vector> 12 13 #include "core/fxcrt/fx_system.h" 14 15 class CPDF_PSEngine; 16 class CPDF_PSOP; 17 class CPDF_SimpleParser; 18 19 enum PDF_PSOP { 20 PSOP_ADD, 21 PSOP_SUB, 22 PSOP_MUL, 23 PSOP_DIV, 24 PSOP_IDIV, 25 PSOP_MOD, 26 PSOP_NEG, 27 PSOP_ABS, 28 PSOP_CEILING, 29 PSOP_FLOOR, 30 PSOP_ROUND, 31 PSOP_TRUNCATE, 32 PSOP_SQRT, 33 PSOP_SIN, 34 PSOP_COS, 35 PSOP_ATAN, 36 PSOP_EXP, 37 PSOP_LN, 38 PSOP_LOG, 39 PSOP_CVI, 40 PSOP_CVR, 41 PSOP_EQ, 42 PSOP_NE, 43 PSOP_GT, 44 PSOP_GE, 45 PSOP_LT, 46 PSOP_LE, 47 PSOP_AND, 48 PSOP_OR, 49 PSOP_XOR, 50 PSOP_NOT, 51 PSOP_BITSHIFT, 52 PSOP_TRUE, 53 PSOP_FALSE, 54 PSOP_IF, 55 PSOP_IFELSE, 56 PSOP_POP, 57 PSOP_EXCH, 58 PSOP_DUP, 59 PSOP_COPY, 60 PSOP_INDEX, 61 PSOP_ROLL, 62 PSOP_PROC, 63 PSOP_CONST 64 }; 65 66 constexpr uint32_t PSENGINE_STACKSIZE = 100; 67 68 class CPDF_PSProc { 69 public: 70 CPDF_PSProc(); 71 ~CPDF_PSProc(); 72 73 bool Parse(CPDF_SimpleParser* parser, int depth); 74 bool Execute(CPDF_PSEngine* pEngine); 75 76 private: 77 static const int kMaxDepth = 128; 78 std::vector<std::unique_ptr<CPDF_PSOP>> m_Operators; 79 }; 80 81 class CPDF_PSEngine { 82 public: 83 CPDF_PSEngine(); 84 ~CPDF_PSEngine(); 85 86 bool Parse(const FX_CHAR* str, int size); 87 bool Execute(); 88 bool DoOperator(PDF_PSOP op); 89 void Reset() { m_StackCount = 0; } 90 void Push(FX_FLOAT value); 91 FX_FLOAT Pop(); 92 uint32_t GetStackSize() const { return m_StackCount; } 93 94 private: 95 FX_FLOAT m_Stack[PSENGINE_STACKSIZE]; 96 uint32_t m_StackCount; 97 CPDF_PSProc m_MainProc; 98 }; 99 100 #endif // CORE_FPDFAPI_PAGE_CPDF_PSENGINE_H_ 101
