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 #include "core/fxcodec/codec/ccodec_jbig2module.h" 8 9 #include <list> 10 #include <memory> 11 12 #include "core/fpdfapi/parser/cpdf_stream_acc.h" 13 #include "core/fxcodec/JBig2_DocumentContext.h" 14 #include "core/fxcodec/jbig2/JBig2_Context.h" 15 #include "core/fxcodec/jbig2/JBig2_Image.h" 16 #include "core/fxcrt/fx_memory.h" 17 #include "third_party/base/ptr_util.h" 18 19 JBig2_DocumentContext::JBig2_DocumentContext() {} 20 21 JBig2_DocumentContext::~JBig2_DocumentContext() {} 22 23 JBig2_DocumentContext* GetJBig2DocumentContext( 24 std::unique_ptr<JBig2_DocumentContext>* pContextHolder) { 25 if (!pContextHolder->get()) 26 *pContextHolder = pdfium::MakeUnique<JBig2_DocumentContext>(); 27 return pContextHolder->get(); 28 } 29 30 CCodec_Jbig2Context::CCodec_Jbig2Context() 31 : m_width(0), 32 m_height(0), 33 m_pGlobalStream(nullptr), 34 m_pSrcStream(nullptr), 35 m_dest_buf(0), 36 m_dest_pitch(0), 37 m_pPause(nullptr) {} 38 39 CCodec_Jbig2Context::~CCodec_Jbig2Context() {} 40 41 CCodec_Jbig2Module::~CCodec_Jbig2Module() {} 42 43 FXCODEC_STATUS CCodec_Jbig2Module::StartDecode( 44 CCodec_Jbig2Context* pJbig2Context, 45 std::unique_ptr<JBig2_DocumentContext>* pContextHolder, 46 uint32_t width, 47 uint32_t height, 48 CPDF_StreamAcc* src_stream, 49 CPDF_StreamAcc* global_stream, 50 uint8_t* dest_buf, 51 uint32_t dest_pitch, 52 IFX_Pause* pPause) { 53 if (!pJbig2Context) 54 return FXCODEC_STATUS_ERR_PARAMS; 55 56 JBig2_DocumentContext* pJBig2DocumentContext = 57 GetJBig2DocumentContext(pContextHolder); 58 pJbig2Context->m_width = width; 59 pJbig2Context->m_height = height; 60 pJbig2Context->m_pSrcStream = src_stream; 61 pJbig2Context->m_pGlobalStream = global_stream; 62 pJbig2Context->m_dest_buf = dest_buf; 63 pJbig2Context->m_dest_pitch = dest_pitch; 64 pJbig2Context->m_pPause = pPause; 65 FXSYS_memset(dest_buf, 0, height * dest_pitch); 66 pJbig2Context->m_pContext = pdfium::MakeUnique<CJBig2_Context>( 67 global_stream, src_stream, pJBig2DocumentContext->GetSymbolDictCache(), 68 pPause, false); 69 if (!pJbig2Context->m_pContext) 70 return FXCODEC_STATUS_ERROR; 71 72 int ret = pJbig2Context->m_pContext->getFirstPage(dest_buf, width, height, 73 dest_pitch, pPause); 74 if (pJbig2Context->m_pContext->GetProcessingStatus() == 75 FXCODEC_STATUS_DECODE_FINISH) { 76 pJbig2Context->m_pContext.reset(); 77 if (ret != JBIG2_SUCCESS) 78 return FXCODEC_STATUS_ERROR; 79 80 int dword_size = height * dest_pitch / 4; 81 uint32_t* dword_buf = (uint32_t*)dest_buf; 82 for (int i = 0; i < dword_size; i++) 83 dword_buf[i] = ~dword_buf[i]; 84 return FXCODEC_STATUS_DECODE_FINISH; 85 } 86 return pJbig2Context->m_pContext->GetProcessingStatus(); 87 } 88 89 FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode( 90 CCodec_Jbig2Context* pJbig2Context, 91 IFX_Pause* pPause) { 92 int ret = pJbig2Context->m_pContext->Continue(pPause); 93 if (pJbig2Context->m_pContext->GetProcessingStatus() != 94 FXCODEC_STATUS_DECODE_FINISH) { 95 return pJbig2Context->m_pContext->GetProcessingStatus(); 96 } 97 pJbig2Context->m_pContext.reset(); 98 if (ret != JBIG2_SUCCESS) 99 return FXCODEC_STATUS_ERROR; 100 101 int dword_size = pJbig2Context->m_height * pJbig2Context->m_dest_pitch / 4; 102 uint32_t* dword_buf = (uint32_t*)pJbig2Context->m_dest_buf; 103 for (int i = 0; i < dword_size; i++) 104 dword_buf[i] = ~dword_buf[i]; 105 return FXCODEC_STATUS_DECODE_FINISH; 106 } 107
