1 files changed, 94 insertions, 0 deletions
diff --git a/core/fxcodec/codec/ccodec_jbig2module.cpp b/core/fxcodec/codec/ccodec_jbig2module.cpp
new file mode 100644
index 0000000000..36d6a0609e
--- /dev/null
+++ b/core/fxcodec/codec/ccodec_jbig2module.cpp
@@ -0,0 +1,94 @@
+// 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 RetainPtr<CPDF_StreamAcc>& src_stream,
+    const RetainPtr<CPDF_StreamAcc>& global_stream,
+    uint8_t* dest_buf,
+    uint32_t dest_pitch,
+    PauseIndicatorIface* 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);
+  bool succeeded = pJbig2Context->m_pContext->GetFirstPage(
+      dest_buf, width, height, dest_pitch, pPause);
+  return Decode(pJbig2Context, succeeded);
+}
+
+FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode(
+    CCodec_Jbig2Context* pJbig2Context,
+    PauseIndicatorIface* pPause) {
+  bool succeeded = pJbig2Context->m_pContext->Continue(pPause);
+  return Decode(pJbig2Context, succeeded);
+}
+
+FXCODEC_STATUS CCodec_Jbig2Module::Decode(CCodec_Jbig2Context* pJbig2Context,
+                                          bool decode_success) {
+  FXCODEC_STATUS status = pJbig2Context->m_pContext->GetProcessingStatus();
+  if (status != FXCODEC_STATUS_DECODE_FINISH)
+    return status;
+
+  pJbig2Context->m_pContext.reset();
+  if (!decode_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;
+}