diff options
Diffstat (limited to 'core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp')
-rw-r--r-- | core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp | 966 |
1 files changed, 0 insertions, 966 deletions
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp deleted file mode 100644 index 1d7bf64903..0000000000 --- a/core/src/fpdfapi/fpdf_page/fpdf_page_func.cpp +++ /dev/null @@ -1,966 +0,0 @@ -// Copyright 2014 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 - -#include "core/src/fpdfapi/fpdf_page/pageint.h" - -#include <limits.h> - -#include <memory> -#include <utility> -#include <vector> - -#include "core/include/fpdfapi/cpdf_array.h" -#include "core/include/fpdfapi/cpdf_dictionary.h" -#include "core/include/fpdfapi/cpdf_simple_parser.h" -#include "core/include/fpdfapi/fpdf_module.h" -#include "core/include/fpdfapi/fpdf_page.h" -#include "core/include/fxcrt/fx_safe_types.h" -#include "third_party/base/numerics/safe_conversions_impl.h" - -namespace { - -enum PDF_PSOP { - PSOP_ADD, - PSOP_SUB, - PSOP_MUL, - PSOP_DIV, - PSOP_IDIV, - PSOP_MOD, - PSOP_NEG, - PSOP_ABS, - PSOP_CEILING, - PSOP_FLOOR, - PSOP_ROUND, - PSOP_TRUNCATE, - PSOP_SQRT, - PSOP_SIN, - PSOP_COS, - PSOP_ATAN, - PSOP_EXP, - PSOP_LN, - PSOP_LOG, - PSOP_CVI, - PSOP_CVR, - PSOP_EQ, - PSOP_NE, - PSOP_GT, - PSOP_GE, - PSOP_LT, - PSOP_LE, - PSOP_AND, - PSOP_OR, - PSOP_XOR, - PSOP_NOT, - PSOP_BITSHIFT, - PSOP_TRUE, - PSOP_FALSE, - PSOP_IF, - PSOP_IFELSE, - PSOP_POP, - PSOP_EXCH, - PSOP_DUP, - PSOP_COPY, - PSOP_INDEX, - PSOP_ROLL, - PSOP_PROC, - PSOP_CONST -}; - -class CPDF_PSEngine; -class CPDF_PSProc; - -class CPDF_PSOP { - public: - explicit CPDF_PSOP(PDF_PSOP op) : m_op(op), m_value(0) { - ASSERT(m_op != PSOP_CONST); - ASSERT(m_op != PSOP_PROC); - } - explicit CPDF_PSOP(FX_FLOAT value) : m_op(PSOP_CONST), m_value(value) {} - explicit CPDF_PSOP(std::unique_ptr<CPDF_PSProc> proc) - : m_op(PSOP_PROC), m_value(0), m_proc(std::move(proc)) {} - - FX_FLOAT GetFloatValue() const { - if (m_op == PSOP_CONST) - return m_value; - - ASSERT(false); - return 0; - } - CPDF_PSProc* GetProc() const { - if (m_op == PSOP_PROC) - return m_proc.get(); - ASSERT(false); - return nullptr; - } - - PDF_PSOP GetOp() const { return m_op; } - - private: - const PDF_PSOP m_op; - const FX_FLOAT m_value; - std::unique_ptr<CPDF_PSProc> m_proc; -}; - -class CPDF_PSProc { - public: - CPDF_PSProc() {} - ~CPDF_PSProc() {} - - FX_BOOL Parse(CPDF_SimpleParser* parser); - FX_BOOL Execute(CPDF_PSEngine* pEngine); - - private: - std::vector<std::unique_ptr<CPDF_PSOP>> m_Operators; -}; - -const size_t PSENGINE_STACKSIZE = 100; - -class CPDF_PSEngine { - public: - CPDF_PSEngine(); - ~CPDF_PSEngine(); - - FX_BOOL Parse(const FX_CHAR* str, int size); - FX_BOOL Execute() { return m_MainProc.Execute(this); } - FX_BOOL DoOperator(PDF_PSOP op); - void Reset() { m_StackCount = 0; } - void Push(FX_FLOAT value); - void Push(int value) { Push((FX_FLOAT)value); } - FX_FLOAT Pop(); - int GetStackSize() const { return m_StackCount; } - - private: - FX_FLOAT m_Stack[PSENGINE_STACKSIZE]; - int m_StackCount; - CPDF_PSProc m_MainProc; -}; - -FX_BOOL CPDF_PSProc::Execute(CPDF_PSEngine* pEngine) { - for (size_t i = 0; i < m_Operators.size(); ++i) { - const PDF_PSOP op = m_Operators[i]->GetOp(); - if (op == PSOP_PROC) - continue; - - if (op == PSOP_CONST) { - pEngine->Push(m_Operators[i]->GetFloatValue()); - continue; - } - - if (op == PSOP_IF) { - if (i == 0 || m_Operators[i - 1]->GetOp() != PSOP_PROC) - return FALSE; - - if (static_cast<int>(pEngine->Pop())) - m_Operators[i - 1]->GetProc()->Execute(pEngine); - } else if (op == PSOP_IFELSE) { - if (i < 2 || m_Operators[i - 1]->GetOp() != PSOP_PROC || - m_Operators[i - 2]->GetOp() != PSOP_PROC) { - return FALSE; - } - size_t offset = static_cast<int>(pEngine->Pop()) ? 2 : 1; - m_Operators[i - offset]->GetProc()->Execute(pEngine); - } else { - pEngine->DoOperator(op); - } - } - return TRUE; -} - -CPDF_PSEngine::CPDF_PSEngine() { - m_StackCount = 0; -} -CPDF_PSEngine::~CPDF_PSEngine() {} -void CPDF_PSEngine::Push(FX_FLOAT v) { - if (m_StackCount == PSENGINE_STACKSIZE) { - return; - } - m_Stack[m_StackCount++] = v; -} -FX_FLOAT CPDF_PSEngine::Pop() { - if (m_StackCount == 0) { - return 0; - } - return m_Stack[--m_StackCount]; -} -const struct PDF_PSOpName { - const FX_CHAR* name; - PDF_PSOP op; -} PDF_PSOpNames[] = {{"add", PSOP_ADD}, {"sub", PSOP_SUB}, - {"mul", PSOP_MUL}, {"div", PSOP_DIV}, - {"idiv", PSOP_IDIV}, {"mod", PSOP_MOD}, - {"neg", PSOP_NEG}, {"abs", PSOP_ABS}, - {"ceiling", PSOP_CEILING}, {"floor", PSOP_FLOOR}, - {"round", PSOP_ROUND}, {"truncate", PSOP_TRUNCATE}, - {"sqrt", PSOP_SQRT}, {"sin", PSOP_SIN}, - {"cos", PSOP_COS}, {"atan", PSOP_ATAN}, - {"exp", PSOP_EXP}, {"ln", PSOP_LN}, - {"log", PSOP_LOG}, {"cvi", PSOP_CVI}, - {"cvr", PSOP_CVR}, {"eq", PSOP_EQ}, - {"ne", PSOP_NE}, {"gt", PSOP_GT}, - {"ge", PSOP_GE}, {"lt", PSOP_LT}, - {"le", PSOP_LE}, {"and", PSOP_AND}, - {"or", PSOP_OR}, {"xor", PSOP_XOR}, - {"not", PSOP_NOT}, {"bitshift", PSOP_BITSHIFT}, - {"true", PSOP_TRUE}, {"false", PSOP_FALSE}, - {"if", PSOP_IF}, {"ifelse", PSOP_IFELSE}, - {"pop", PSOP_POP}, {"exch", PSOP_EXCH}, - {"dup", PSOP_DUP}, {"copy", PSOP_COPY}, - {"index", PSOP_INDEX}, {"roll", PSOP_ROLL}}; - -FX_BOOL CPDF_PSEngine::Parse(const FX_CHAR* str, int size) { - CPDF_SimpleParser parser((uint8_t*)str, size); - CFX_ByteStringC word = parser.GetWord(); - if (word != "{") { - return FALSE; - } - return m_MainProc.Parse(&parser); -} -FX_BOOL CPDF_PSProc::Parse(CPDF_SimpleParser* parser) { - while (1) { - CFX_ByteStringC word = parser->GetWord(); - if (word.IsEmpty()) { - return FALSE; - } - if (word == "}") { - return TRUE; - } - if (word == "{") { - std::unique_ptr<CPDF_PSProc> proc(new CPDF_PSProc); - std::unique_ptr<CPDF_PSOP> op(new CPDF_PSOP(std::move(proc))); - m_Operators.push_back(std::move(op)); - if (!m_Operators.back()->GetProc()->Parse(parser)) { - return FALSE; - } - } else { - bool found = false; - for (const PDF_PSOpName& op_name : PDF_PSOpNames) { - if (word == CFX_ByteStringC(op_name.name)) { - std::unique_ptr<CPDF_PSOP> op(new CPDF_PSOP(op_name.op)); - m_Operators.push_back(std::move(op)); - found = true; - break; - } - } - if (!found) { - std::unique_ptr<CPDF_PSOP> op(new CPDF_PSOP(FX_atof(word))); - m_Operators.push_back(std::move(op)); - } - } - } -} - -FX_BOOL CPDF_PSEngine::DoOperator(PDF_PSOP op) { - int i1, i2; - FX_FLOAT d1, d2; - switch (op) { - case PSOP_ADD: - d1 = Pop(); - d2 = Pop(); - Push(d1 + d2); - break; - case PSOP_SUB: - d2 = Pop(); - d1 = Pop(); - Push(d1 - d2); - break; - case PSOP_MUL: - d1 = Pop(); - d2 = Pop(); - Push(d1 * d2); - break; - case PSOP_DIV: - d2 = Pop(); - d1 = Pop(); - Push(d1 / d2); - break; - case PSOP_IDIV: - i2 = (int)Pop(); - i1 = (int)Pop(); - Push(i1 / i2); - break; - case PSOP_MOD: - i2 = (int)Pop(); - i1 = (int)Pop(); - Push(i1 % i2); - break; - case PSOP_NEG: - d1 = Pop(); - Push(-d1); - break; - case PSOP_ABS: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_fabs(d1)); - break; - case PSOP_CEILING: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_ceil(d1)); - break; - case PSOP_FLOOR: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_floor(d1)); - break; - case PSOP_ROUND: - d1 = Pop(); - Push(FXSYS_round(d1)); - break; - case PSOP_TRUNCATE: - i1 = (int)Pop(); - Push(i1); - break; - case PSOP_SQRT: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_sqrt(d1)); - break; - case PSOP_SIN: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_sin(d1 * FX_PI / 180.0f)); - break; - case PSOP_COS: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_cos(d1 * FX_PI / 180.0f)); - break; - case PSOP_ATAN: - d2 = Pop(); - d1 = Pop(); - d1 = (FX_FLOAT)(FXSYS_atan2(d1, d2) * 180.0 / FX_PI); - if (d1 < 0) { - d1 += 360; - } - Push(d1); - break; - case PSOP_EXP: - d2 = Pop(); - d1 = Pop(); - Push((FX_FLOAT)FXSYS_pow(d1, d2)); - break; - case PSOP_LN: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_log(d1)); - break; - case PSOP_LOG: - d1 = Pop(); - Push((FX_FLOAT)FXSYS_log10(d1)); - break; - case PSOP_CVI: - i1 = (int)Pop(); - Push(i1); - break; - case PSOP_CVR: - break; - case PSOP_EQ: - d2 = Pop(); - d1 = Pop(); - Push((int)(d1 == d2)); - break; - case PSOP_NE: - d2 = Pop(); - d1 = Pop(); - Push((int)(d1 != d2)); - break; - case PSOP_GT: - d2 = Pop(); - d1 = Pop(); - Push((int)(d1 > d2)); - break; - case PSOP_GE: - d2 = Pop(); - d1 = Pop(); - Push((int)(d1 >= d2)); - break; - case PSOP_LT: - d2 = Pop(); - d1 = Pop(); - Push((int)(d1 < d2)); - break; - case PSOP_LE: - d2 = Pop(); - d1 = Pop(); - Push((int)(d1 <= d2)); - break; - case PSOP_AND: - i1 = (int)Pop(); - i2 = (int)Pop(); - Push(i1 & i2); - break; - case PSOP_OR: - i1 = (int)Pop(); - i2 = (int)Pop(); - Push(i1 | i2); - break; - case PSOP_XOR: - i1 = (int)Pop(); - i2 = (int)Pop(); - Push(i1 ^ i2); - break; - case PSOP_NOT: - i1 = (int)Pop(); - Push((int)!i1); - break; - case PSOP_BITSHIFT: { - int shift = (int)Pop(); - int i = (int)Pop(); - if (shift > 0) { - Push(i << shift); - } else { - Push(i >> -shift); - } - break; - } - case PSOP_TRUE: - Push(1); - break; - case PSOP_FALSE: - Push(0); - break; - case PSOP_POP: - Pop(); - break; - case PSOP_EXCH: - d2 = Pop(); - d1 = Pop(); - Push(d2); - Push(d1); - break; - case PSOP_DUP: - d1 = Pop(); - Push(d1); - Push(d1); - break; - case PSOP_COPY: { - int n = (int)Pop(); - if (n < 0 || n > PSENGINE_STACKSIZE || - m_StackCount + n > PSENGINE_STACKSIZE || n > m_StackCount) { - break; - } - for (int i = 0; i < n; i++) { - m_Stack[m_StackCount + i] = m_Stack[m_StackCount + i - n]; - } - m_StackCount += n; - break; - } - case PSOP_INDEX: { - int n = (int)Pop(); - if (n < 0 || n >= m_StackCount) { - break; - } - Push(m_Stack[m_StackCount - n - 1]); - break; - } - case PSOP_ROLL: { - int j = (int)Pop(); - int n = (int)Pop(); - if (m_StackCount == 0) { - break; - } - if (n < 0 || n > m_StackCount) { - break; - } - if (j < 0) { - for (int i = 0; i < -j; i++) { - FX_FLOAT first = m_Stack[m_StackCount - n]; - for (int ii = 0; ii < n - 1; ii++) { - m_Stack[m_StackCount - n + ii] = m_Stack[m_StackCount - n + ii + 1]; - } - m_Stack[m_StackCount - 1] = first; - } - } else { - for (int i = 0; i < j; i++) { - FX_FLOAT last = m_Stack[m_StackCount - 1]; - int ii; - for (ii = 0; ii < n - 1; ii++) { - m_Stack[m_StackCount - ii - 1] = m_Stack[m_StackCount - ii - 2]; - } - m_Stack[m_StackCount - ii - 1] = last; - } - } - break; - } - default: - break; - } - return TRUE; -} -static FX_FLOAT PDF_Interpolate(FX_FLOAT x, - FX_FLOAT xmin, - FX_FLOAT xmax, - FX_FLOAT ymin, - FX_FLOAT ymax) { - return ((x - xmin) * (ymax - ymin) / (xmax - xmin)) + ymin; -} -static FX_DWORD _GetBits32(const uint8_t* pData, int bitpos, int nbits) { - int result = 0; - for (int i = 0; i < nbits; i++) - if (pData[(bitpos + i) / 8] & (1 << (7 - (bitpos + i) % 8))) { - result |= 1 << (nbits - i - 1); - } - return result; -} -typedef struct { - FX_FLOAT encode_max, encode_min; - int sizes; -} SampleEncodeInfo; -typedef struct { FX_FLOAT decode_max, decode_min; } SampleDecodeInfo; - -class CPDF_SampledFunc : public CPDF_Function { - public: - CPDF_SampledFunc(); - ~CPDF_SampledFunc() override; - - // CPDF_Function - FX_BOOL v_Init(CPDF_Object* pObj) override; - FX_BOOL v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override; - - SampleEncodeInfo* m_pEncodeInfo; - SampleDecodeInfo* m_pDecodeInfo; - FX_DWORD m_nBitsPerSample; - FX_DWORD m_SampleMax; - CPDF_StreamAcc* m_pSampleStream; -}; - -CPDF_SampledFunc::CPDF_SampledFunc() { - m_pSampleStream = NULL; - m_pEncodeInfo = NULL; - m_pDecodeInfo = NULL; -} -CPDF_SampledFunc::~CPDF_SampledFunc() { - delete m_pSampleStream; - FX_Free(m_pEncodeInfo); - FX_Free(m_pDecodeInfo); -} -FX_BOOL CPDF_SampledFunc::v_Init(CPDF_Object* pObj) { - CPDF_Stream* pStream = pObj->AsStream(); - if (!pStream) - return false; - - CPDF_Dictionary* pDict = pStream->GetDict(); - CPDF_Array* pSize = pDict->GetArrayBy("Size"); - CPDF_Array* pEncode = pDict->GetArrayBy("Encode"); - CPDF_Array* pDecode = pDict->GetArrayBy("Decode"); - m_nBitsPerSample = pDict->GetIntegerBy("BitsPerSample"); - if (m_nBitsPerSample > 32) { - return FALSE; - } - m_SampleMax = 0xffffffff >> (32 - m_nBitsPerSample); - m_pSampleStream = new CPDF_StreamAcc; - m_pSampleStream->LoadAllData(pStream, FALSE); - m_pEncodeInfo = FX_Alloc(SampleEncodeInfo, m_nInputs); - FX_SAFE_DWORD nTotalSampleBits = 1; - for (int i = 0; i < m_nInputs; i++) { - m_pEncodeInfo[i].sizes = pSize ? pSize->GetIntegerAt(i) : 0; - if (!pSize && i == 0) { - m_pEncodeInfo[i].sizes = pDict->GetIntegerBy("Size"); - } - nTotalSampleBits *= m_pEncodeInfo[i].sizes; - if (pEncode) { - m_pEncodeInfo[i].encode_min = pEncode->GetFloatAt(i * 2); - m_pEncodeInfo[i].encode_max = pEncode->GetFloatAt(i * 2 + 1); - } else { - m_pEncodeInfo[i].encode_min = 0; - if (m_pEncodeInfo[i].sizes == 1) { - m_pEncodeInfo[i].encode_max = 1; - } else { - m_pEncodeInfo[i].encode_max = (FX_FLOAT)m_pEncodeInfo[i].sizes - 1; - } - } - } - nTotalSampleBits *= m_nBitsPerSample; - nTotalSampleBits *= m_nOutputs; - FX_SAFE_DWORD nTotalSampleBytes = nTotalSampleBits; - nTotalSampleBytes += 7; - nTotalSampleBytes /= 8; - if (!nTotalSampleBytes.IsValid() || nTotalSampleBytes.ValueOrDie() == 0 || - nTotalSampleBytes.ValueOrDie() > m_pSampleStream->GetSize()) { - return FALSE; - } - m_pDecodeInfo = FX_Alloc(SampleDecodeInfo, m_nOutputs); - for (int i = 0; i < m_nOutputs; i++) { - if (pDecode) { - m_pDecodeInfo[i].decode_min = pDecode->GetFloatAt(2 * i); - m_pDecodeInfo[i].decode_max = pDecode->GetFloatAt(2 * i + 1); - } else { - m_pDecodeInfo[i].decode_min = m_pRanges[i * 2]; - m_pDecodeInfo[i].decode_max = m_pRanges[i * 2 + 1]; - } - } - return TRUE; -} -FX_BOOL CPDF_SampledFunc::v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const { - int pos = 0; - CFX_FixedBufGrow<FX_FLOAT, 16> encoded_input_buf(m_nInputs); - FX_FLOAT* encoded_input = encoded_input_buf; - CFX_FixedBufGrow<int, 32> int_buf(m_nInputs * 2); - int* index = int_buf; - int* blocksize = index + m_nInputs; - for (int i = 0; i < m_nInputs; i++) { - if (i == 0) { - blocksize[i] = 1; - } else { - blocksize[i] = blocksize[i - 1] * m_pEncodeInfo[i - 1].sizes; - } - encoded_input[i] = PDF_Interpolate( - inputs[i], m_pDomains[i * 2], m_pDomains[i * 2 + 1], - m_pEncodeInfo[i].encode_min, m_pEncodeInfo[i].encode_max); - index[i] = (int)encoded_input[i]; - if (index[i] < 0) { - index[i] = 0; - } else if (index[i] > m_pEncodeInfo[i].sizes - 1) { - index[i] = m_pEncodeInfo[i].sizes - 1; - } - pos += index[i] * blocksize[i]; - } - FX_SAFE_INT32 bits_to_output = m_nOutputs; - bits_to_output *= m_nBitsPerSample; - if (!bits_to_output.IsValid()) { - return FALSE; - } - FX_SAFE_INT32 bitpos = pos; - bitpos *= bits_to_output.ValueOrDie(); - if (!bitpos.IsValid()) { - return FALSE; - } - FX_SAFE_INT32 range_check = bitpos; - range_check += bits_to_output.ValueOrDie(); - if (!range_check.IsValid()) { - return FALSE; - } - const uint8_t* pSampleData = m_pSampleStream->GetData(); - if (!pSampleData) { - return FALSE; - } - for (int j = 0; j < m_nOutputs; j++) { - FX_DWORD sample = - _GetBits32(pSampleData, bitpos.ValueOrDie() + j * m_nBitsPerSample, - m_nBitsPerSample); - FX_FLOAT encoded = (FX_FLOAT)sample; - for (int i = 0; i < m_nInputs; i++) { - if (index[i] == m_pEncodeInfo[i].sizes - 1) { - if (index[i] == 0) { - encoded = encoded_input[i] * (FX_FLOAT)sample; - } - } else { - FX_SAFE_INT32 bitpos2 = blocksize[i]; - bitpos2 += pos; - bitpos2 *= m_nOutputs; - bitpos2 += j; - bitpos2 *= m_nBitsPerSample; - if (!bitpos2.IsValid()) { - return FALSE; - } - FX_DWORD sample1 = - _GetBits32(pSampleData, bitpos2.ValueOrDie(), m_nBitsPerSample); - encoded += (encoded_input[i] - index[i]) * - ((FX_FLOAT)sample1 - (FX_FLOAT)sample); - } - } - results[j] = PDF_Interpolate(encoded, 0, (FX_FLOAT)m_SampleMax, - m_pDecodeInfo[j].decode_min, - m_pDecodeInfo[j].decode_max); - } - return TRUE; -} - -class CPDF_PSFunc : public CPDF_Function { - public: - // CPDF_Function - FX_BOOL v_Init(CPDF_Object* pObj) override; - FX_BOOL v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override; - - CPDF_PSEngine m_PS; -}; - -FX_BOOL CPDF_PSFunc::v_Init(CPDF_Object* pObj) { - CPDF_Stream* pStream = pObj->AsStream(); - CPDF_StreamAcc acc; - acc.LoadAllData(pStream, FALSE); - return m_PS.Parse((const FX_CHAR*)acc.GetData(), acc.GetSize()); -} -FX_BOOL CPDF_PSFunc::v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const { - CPDF_PSEngine& PS = (CPDF_PSEngine&)m_PS; - PS.Reset(); - int i; - for (i = 0; i < m_nInputs; i++) { - PS.Push(inputs[i]); - } - PS.Execute(); - if (PS.GetStackSize() < m_nOutputs) { - return FALSE; - } - for (i = 0; i < m_nOutputs; i++) { - results[m_nOutputs - i - 1] = PS.Pop(); - } - return TRUE; -} - -class CPDF_ExpIntFunc : public CPDF_Function { - public: - CPDF_ExpIntFunc(); - ~CPDF_ExpIntFunc() override; - - // CPDF_Function - FX_BOOL v_Init(CPDF_Object* pObj) override; - FX_BOOL v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override; - - FX_FLOAT m_Exponent; - FX_FLOAT* m_pBeginValues; - FX_FLOAT* m_pEndValues; - int m_nOrigOutputs; -}; - -CPDF_ExpIntFunc::CPDF_ExpIntFunc() { - m_pBeginValues = NULL; - m_pEndValues = NULL; -} -CPDF_ExpIntFunc::~CPDF_ExpIntFunc() { - FX_Free(m_pBeginValues); - FX_Free(m_pEndValues); -} -FX_BOOL CPDF_ExpIntFunc::v_Init(CPDF_Object* pObj) { - CPDF_Dictionary* pDict = pObj->GetDict(); - if (!pDict) { - return FALSE; - } - CPDF_Array* pArray0 = pDict->GetArrayBy("C0"); - if (m_nOutputs == 0) { - m_nOutputs = 1; - if (pArray0) { - m_nOutputs = pArray0->GetCount(); - } - } - CPDF_Array* pArray1 = pDict->GetArrayBy("C1"); - m_pBeginValues = FX_Alloc2D(FX_FLOAT, m_nOutputs, 2); - m_pEndValues = FX_Alloc2D(FX_FLOAT, m_nOutputs, 2); - for (int i = 0; i < m_nOutputs; i++) { - m_pBeginValues[i] = pArray0 ? pArray0->GetFloatAt(i) : 0.0f; - m_pEndValues[i] = pArray1 ? pArray1->GetFloatAt(i) : 1.0f; - } - m_Exponent = pDict->GetFloatBy("N"); - m_nOrigOutputs = m_nOutputs; - if (m_nOutputs && m_nInputs > INT_MAX / m_nOutputs) { - return FALSE; - } - m_nOutputs *= m_nInputs; - return TRUE; -} -FX_BOOL CPDF_ExpIntFunc::v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const { - for (int i = 0; i < m_nInputs; i++) - for (int j = 0; j < m_nOrigOutputs; j++) { - results[i * m_nOrigOutputs + j] = - m_pBeginValues[j] + - (FX_FLOAT)FXSYS_pow(inputs[i], m_Exponent) * - (m_pEndValues[j] - m_pBeginValues[j]); - } - return TRUE; -} - -class CPDF_StitchFunc : public CPDF_Function { - public: - CPDF_StitchFunc(); - ~CPDF_StitchFunc() override; - - // CPDF_Function - FX_BOOL v_Init(CPDF_Object* pObj) override; - FX_BOOL v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override; - - std::vector<CPDF_Function*> m_pSubFunctions; - FX_FLOAT* m_pBounds; - FX_FLOAT* m_pEncode; - - static const int kRequiredNumInputs = 1; -}; - -CPDF_StitchFunc::CPDF_StitchFunc() { - m_pBounds = NULL; - m_pEncode = NULL; -} -CPDF_StitchFunc::~CPDF_StitchFunc() { - for (auto& sub : m_pSubFunctions) { - delete sub; - } - FX_Free(m_pBounds); - FX_Free(m_pEncode); -} -FX_BOOL CPDF_StitchFunc::v_Init(CPDF_Object* pObj) { - CPDF_Dictionary* pDict = pObj->GetDict(); - if (!pDict) { - return FALSE; - } - if (m_nInputs != kRequiredNumInputs) { - return FALSE; - } - CPDF_Array* pArray = pDict->GetArrayBy("Functions"); - if (!pArray) { - return FALSE; - } - FX_DWORD nSubs = pArray->GetCount(); - if (nSubs == 0) { - return FALSE; - } - m_nOutputs = 0; - for (FX_DWORD i = 0; i < nSubs; i++) { - CPDF_Object* pSub = pArray->GetElementValue(i); - if (pSub == pObj) { - return FALSE; - } - std::unique_ptr<CPDF_Function> pFunc(CPDF_Function::Load(pSub)); - if (!pFunc) { - return FALSE; - } - // Check that the input dimensionality is 1, and that all output - // dimensionalities are the same. - if (pFunc->CountInputs() != kRequiredNumInputs) { - return FALSE; - } - if (pFunc->CountOutputs() != m_nOutputs) { - if (m_nOutputs) - return FALSE; - - m_nOutputs = pFunc->CountOutputs(); - } - - m_pSubFunctions.push_back(pFunc.release()); - } - m_pBounds = FX_Alloc(FX_FLOAT, nSubs + 1); - m_pBounds[0] = m_pDomains[0]; - pArray = pDict->GetArrayBy("Bounds"); - if (!pArray) { - return FALSE; - } - for (FX_DWORD i = 0; i < nSubs - 1; i++) { - m_pBounds[i + 1] = pArray->GetFloatAt(i); - } - m_pBounds[nSubs] = m_pDomains[1]; - m_pEncode = FX_Alloc2D(FX_FLOAT, nSubs, 2); - pArray = pDict->GetArrayBy("Encode"); - if (!pArray) { - return FALSE; - } - for (FX_DWORD i = 0; i < nSubs * 2; i++) { - m_pEncode[i] = pArray->GetFloatAt(i); - } - return TRUE; -} -FX_BOOL CPDF_StitchFunc::v_Call(FX_FLOAT* inputs, FX_FLOAT* outputs) const { - FX_FLOAT input = inputs[0]; - size_t i; - for (i = 0; i < m_pSubFunctions.size() - 1; i++) - if (input < m_pBounds[i + 1]) { - break; - } - if (!m_pSubFunctions[i]) { - return FALSE; - } - input = PDF_Interpolate(input, m_pBounds[i], m_pBounds[i + 1], - m_pEncode[i * 2], m_pEncode[i * 2 + 1]); - int nresults; - m_pSubFunctions[i]->Call(&input, kRequiredNumInputs, outputs, nresults); - return TRUE; -} - -} // namespace - -CPDF_Function* CPDF_Function::Load(CPDF_Object* pFuncObj) { - if (!pFuncObj) { - return NULL; - } - CPDF_Function* pFunc = NULL; - int type; - if (CPDF_Stream* pStream = pFuncObj->AsStream()) { - type = pStream->GetDict()->GetIntegerBy("FunctionType"); - } else if (CPDF_Dictionary* pDict = pFuncObj->AsDictionary()) { - type = pDict->GetIntegerBy("FunctionType"); - } else { - return NULL; - } - if (type == 0) { - pFunc = new CPDF_SampledFunc; - } else if (type == 2) { - pFunc = new CPDF_ExpIntFunc; - } else if (type == 3) { - pFunc = new CPDF_StitchFunc; - } else if (type == 4) { - pFunc = new CPDF_PSFunc; - } else { - return NULL; - } - if (!pFunc->Init(pFuncObj)) { - delete pFunc; - return NULL; - } - return pFunc; -} -CPDF_Function::CPDF_Function() { - m_pDomains = NULL; - m_pRanges = NULL; -} -CPDF_Function::~CPDF_Function() { - FX_Free(m_pDomains); - FX_Free(m_pRanges); -} -FX_BOOL CPDF_Function::Init(CPDF_Object* pObj) { - CPDF_Stream* pStream = pObj->AsStream(); - CPDF_Dictionary* pDict = pStream ? pStream->GetDict() : pObj->AsDictionary(); - - CPDF_Array* pDomains = pDict->GetArrayBy("Domain"); - if (!pDomains) - return FALSE; - - m_nInputs = pDomains->GetCount() / 2; - if (m_nInputs == 0) - return FALSE; - - m_pDomains = FX_Alloc2D(FX_FLOAT, m_nInputs, 2); - for (int i = 0; i < m_nInputs * 2; i++) { - m_pDomains[i] = pDomains->GetFloatAt(i); - } - CPDF_Array* pRanges = pDict->GetArrayBy("Range"); - m_nOutputs = 0; - if (pRanges) { - m_nOutputs = pRanges->GetCount() / 2; - m_pRanges = FX_Alloc2D(FX_FLOAT, m_nOutputs, 2); - for (int i = 0; i < m_nOutputs * 2; i++) { - m_pRanges[i] = pRanges->GetFloatAt(i); - } - } - FX_DWORD old_outputs = m_nOutputs; - if (!v_Init(pObj)) { - return FALSE; - } - if (m_pRanges && m_nOutputs > (int)old_outputs) { - m_pRanges = FX_Realloc(FX_FLOAT, m_pRanges, m_nOutputs * 2); - if (m_pRanges) { - FXSYS_memset(m_pRanges + (old_outputs * 2), 0, - sizeof(FX_FLOAT) * (m_nOutputs - old_outputs) * 2); - } - } - return TRUE; -} -FX_BOOL CPDF_Function::Call(FX_FLOAT* inputs, - int ninputs, - FX_FLOAT* results, - int& nresults) const { - if (m_nInputs != ninputs) { - return FALSE; - } - nresults = m_nOutputs; - for (int i = 0; i < m_nInputs; i++) { - if (inputs[i] < m_pDomains[i * 2]) { - inputs[i] = m_pDomains[i * 2]; - } else if (inputs[i] > m_pDomains[i * 2 + 1]) { - inputs[i] = m_pDomains[i * 2] + 1; - } - } - v_Call(inputs, results); - if (m_pRanges) { - for (int i = 0; i < m_nOutputs; i++) { - if (results[i] < m_pRanges[i * 2]) { - results[i] = m_pRanges[i * 2]; - } else if (results[i] > m_pRanges[i * 2 + 1]) { - results[i] = m_pRanges[i * 2 + 1]; - } - } - } - return TRUE; -} |