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// 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/fxcodec/codec/ccodec_jbig2module.h"
#include <list>
#include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h"
#include "core/fxcodec/jbig2/JBig2_Context.h"
#include "core/fxcodec/jbig2/JBig2_Image.h"
#include "core/fxcrt/include/fx_memory.h"
// Holds per-document JBig2 related data.
class JBig2DocumentContext : public CFX_Deletable {
public:
std::list<CJBig2_CachePair>* GetSymbolDictCache() {
return &m_SymbolDictCache;
}
~JBig2DocumentContext() override {
for (auto it : m_SymbolDictCache) {
delete it.second;
}
}
private:
std::list<CJBig2_CachePair> m_SymbolDictCache;
};
JBig2DocumentContext* GetJBig2DocumentContext(
std::unique_ptr<CFX_Deletable>* pContextHolder) {
if (!pContextHolder->get())
pContextHolder->reset(new JBig2DocumentContext());
return static_cast<JBig2DocumentContext*>(pContextHolder->get());
}
CCodec_Jbig2Context::CCodec_Jbig2Context()
: m_width(0),
m_height(0),
m_pGlobalStream(nullptr),
m_pSrcStream(nullptr),
m_dest_buf(0),
m_dest_pitch(0),
m_pPause(nullptr) {}
CCodec_Jbig2Context::~CCodec_Jbig2Context() {}
CCodec_Jbig2Module::~CCodec_Jbig2Module() {}
FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(
CCodec_Jbig2Context* pJbig2Context,
std::unique_ptr<CFX_Deletable>* pContextHolder,
uint32_t width,
uint32_t height,
CPDF_StreamAcc* src_stream,
CPDF_StreamAcc* global_stream,
uint8_t* dest_buf,
uint32_t dest_pitch,
IFX_Pause* pPause) {
if (!pJbig2Context)
return FXCODEC_STATUS_ERR_PARAMS;
JBig2DocumentContext* pJBig2DocumentContext =
GetJBig2DocumentContext(pContextHolder);
pJbig2Context->m_width = width;
pJbig2Context->m_height = height;
pJbig2Context->m_pSrcStream = src_stream;
pJbig2Context->m_pGlobalStream = global_stream;
pJbig2Context->m_dest_buf = dest_buf;
pJbig2Context->m_dest_pitch = dest_pitch;
pJbig2Context->m_pPause = pPause;
FXSYS_memset(dest_buf, 0, height * dest_pitch);
pJbig2Context->m_pContext.reset(new CJBig2_Context(
global_stream, src_stream, pJBig2DocumentContext->GetSymbolDictCache(),
pPause, false));
if (!pJbig2Context->m_pContext)
return FXCODEC_STATUS_ERROR;
int ret = pJbig2Context->m_pContext->getFirstPage(dest_buf, width, height,
dest_pitch, pPause);
if (pJbig2Context->m_pContext->GetProcessingStatus() ==
FXCODEC_STATUS_DECODE_FINISH) {
pJbig2Context->m_pContext.reset();
if (ret != JBIG2_SUCCESS)
return FXCODEC_STATUS_ERROR;
int dword_size = height * dest_pitch / 4;
uint32_t* dword_buf = (uint32_t*)dest_buf;
for (int i = 0; i < dword_size; i++)
dword_buf[i] = ~dword_buf[i];
return FXCODEC_STATUS_DECODE_FINISH;
}
return pJbig2Context->m_pContext->GetProcessingStatus();
}
FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode(
CCodec_Jbig2Context* pJbig2Context,
IFX_Pause* pPause) {
int ret = pJbig2Context->m_pContext->Continue(pPause);
if (pJbig2Context->m_pContext->GetProcessingStatus() !=
FXCODEC_STATUS_DECODE_FINISH) {
return pJbig2Context->m_pContext->GetProcessingStatus();
}
pJbig2Context->m_pContext.reset();
if (ret != JBIG2_SUCCESS)
return FXCODEC_STATUS_ERROR;
int dword_size = pJbig2Context->m_height * pJbig2Context->m_dest_pitch / 4;
uint32_t* dword_buf = (uint32_t*)pJbig2Context->m_dest_buf;
for (int i = 0; i < dword_size; i++)
dword_buf[i] = ~dword_buf[i];
return FXCODEC_STATUS_DECODE_FINISH;
}
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