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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 <memory>
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fxcodec/JBig2_DocumentContext.h"
#include "core/fxcodec/jbig2/JBig2_Context.h"
#include "core/fxcodec/jbig2/JBig2_Image.h"
#include "core/fxcrt/fx_memory.h"
#include "third_party/base/ptr_util.h"
JBig2_DocumentContext::JBig2_DocumentContext() {}
JBig2_DocumentContext::~JBig2_DocumentContext() {}
JBig2_DocumentContext* GetJBig2DocumentContext(
std::unique_ptr<JBig2_DocumentContext>* pContextHolder) {
if (!pContextHolder->get())
*pContextHolder = pdfium::MakeUnique<JBig2_DocumentContext>();
return 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) {}
CCodec_Jbig2Context::~CCodec_Jbig2Context() {}
CCodec_Jbig2Module::~CCodec_Jbig2Module() {}
FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(
CCodec_Jbig2Context* pJbig2Context,
std::unique_ptr<JBig2_DocumentContext>* pContextHolder,
uint32_t width,
uint32_t height,
const CFX_RetainPtr<CPDF_StreamAcc>& src_stream,
const CFX_RetainPtr<CPDF_StreamAcc>& global_stream,
uint8_t* dest_buf,
uint32_t dest_pitch,
IFX_Pause* pPause) {
if (!pJbig2Context)
return FXCODEC_STATUS_ERR_PARAMS;
JBig2_DocumentContext* 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;
memset(dest_buf, 0, height * dest_pitch);
pJbig2Context->m_pContext = pdfium::MakeUnique<CJBig2_Context>(
global_stream, src_stream, pJBig2DocumentContext->GetSymbolDictCache(),
false);
int ret = pJbig2Context->m_pContext->getFirstPage(dest_buf, width, height,
dest_pitch, pPause);
return Decode(pJbig2Context, ret);
}
FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode(
CCodec_Jbig2Context* pJbig2Context,
IFX_Pause* pPause) {
int ret = pJbig2Context->m_pContext->Continue(pPause);
return Decode(pJbig2Context, ret);
}
FXCODEC_STATUS CCodec_Jbig2Module::Decode(CCodec_Jbig2Context* pJbig2Context,
int result) {
FXCODEC_STATUS status = pJbig2Context->m_pContext->GetProcessingStatus();
if (status != FXCODEC_STATUS_DECODE_FINISH)
return status;
pJbig2Context->m_pContext.reset();
if (result != JBIG2_SUCCESS)
return FXCODEC_STATUS_ERROR;
int dword_size = pJbig2Context->m_height * pJbig2Context->m_dest_pitch / 4;
uint32_t* dword_buf = reinterpret_cast<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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