clang-format all pdfium code.

core/src/fxcodec/codec/fx_codec_jpeg.cpp

 // 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 <setjmp.h>
 
 #include "../../../include/fxcodec/fx_codec.h"
 #include "../../../include/fxcrt/fx_safe_types.h"
 #include "../../../include/fxge/fx_dib.h"
 #include "codec_int.h"
 
 extern "C" {
 #undef FAR
 #include "../../../../third_party/libjpeg/jpeglib.h"
 }
 
 extern "C" {
-    static void _JpegScanSOI(const uint8_t*& src_buf, FX_DWORD& src_size)
-    {
-        if (src_size == 0) {
-            return;
+static void _JpegScanSOI(const uint8_t*& src_buf, FX_DWORD& src_size) {
+  if (src_size == 0) {
+    return;
+  }
+  FX_DWORD offset = 0;
+  while (offset < src_size - 1) {
+    if (src_buf[offset] == 0xff && src_buf[offset + 1] == 0xd8) {
+      src_buf += offset;
+      src_size -= offset;
+      return;
+    }
+    offset++;
+  }
+}
+};
+extern "C" {
+static void _src_do_nothing(struct jpeg_decompress_struct* cinfo) {}
+};
+extern "C" {
+static void _error_fatal(j_common_ptr cinfo) {
+  longjmp(*(jmp_buf*)cinfo->client_data, -1);
+}
+};
+extern "C" {
+static void _src_skip_data(struct jpeg_decompress_struct* cinfo, long num) {
+  if (num > (long)cinfo->src->bytes_in_buffer) {
+    _error_fatal((j_common_ptr)cinfo);
+  }
+  cinfo->src->next_input_byte += num;
+  cinfo->src->bytes_in_buffer -= num;
+}
+};
+extern "C" {
+static boolean _src_fill_buffer(j_decompress_ptr cinfo) {
+  return 0;
+}
+};
+extern "C" {
+static boolean _src_resync(j_decompress_ptr cinfo, int desired) {
+  return 0;
+}
+};
+extern "C" {
+static void _error_do_nothing(j_common_ptr cinfo) {}
+};
+extern "C" {
+static void _error_do_nothing1(j_common_ptr cinfo, int) {}
+};
+extern "C" {
+static void _error_do_nothing2(j_common_ptr cinfo, char*) {}
+};
+#define JPEG_MARKER_EXIF (JPEG_APP0 + 1)
+#define JPEG_MARKER_ICC (JPEG_APP0 + 2)
+#define JPEG_MARKER_AUTHORTIME (JPEG_APP0 + 3)
+#define JPEG_MARKER_MAXSIZE 0xFFFF
+#define JPEG_OVERHEAD_LEN 14
+static FX_BOOL _JpegEmbedIccProfile(j_compress_ptr cinfo,
+                                    const uint8_t* icc_buf_ptr,
+                                    FX_DWORD icc_length) {
+  if (icc_buf_ptr == NULL || icc_length == 0) {
+    return FALSE;
+  }
+  FX_DWORD icc_segment_size = (JPEG_MARKER_MAXSIZE - 2 - JPEG_OVERHEAD_LEN);
+  FX_DWORD icc_segment_num = (icc_length / icc_segment_size) + 1;
+  if (icc_segment_num > 255) {
+    return FALSE;
+  }
+  FX_DWORD icc_data_length =
+      JPEG_OVERHEAD_LEN + (icc_segment_num > 1 ? icc_segment_size : icc_length);
+  uint8_t* icc_data = FX_Alloc(uint8_t, icc_data_length);
+  FXSYS_memcpy(icc_data, "\x49\x43\x43\x5f\x50\x52\x4f\x46\x49\x4c\x45\x00",
+               12);
+  icc_data[13] = (uint8_t)icc_segment_num;
+  for (uint8_t i = 0; i < (icc_segment_num - 1); i++) {
+    icc_data[12] = i + 1;
+    FXSYS_memcpy(icc_data + JPEG_OVERHEAD_LEN,
+                 icc_buf_ptr + i * icc_segment_size, icc_segment_size);
+    jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data, icc_data_length);
+  }
+  icc_data[12] = (uint8_t)icc_segment_num;
+  FX_DWORD icc_size = (icc_segment_num - 1) * icc_segment_size;
+  FXSYS_memcpy(icc_data + JPEG_OVERHEAD_LEN, icc_buf_ptr + icc_size,
+               icc_length - icc_size);
+  jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data,
+                    JPEG_OVERHEAD_LEN + icc_length - icc_size);
+  FX_Free(icc_data);
+  return TRUE;
+}
+extern "C" {
+static void _dest_do_nothing(j_compress_ptr cinfo) {}
+};
+extern "C" {
+static boolean _dest_empty(j_compress_ptr cinfo) {
+  return FALSE;
+}
+};
+#define JPEG_BLOCK_SIZE 1048576
+static void _JpegEncode(const CFX_DIBSource* pSource,
+                        uint8_t*& dest_buf,
+                        FX_STRSIZE& dest_size,
+                        int quality,
+                        const uint8_t* icc_buf,
+                        FX_DWORD icc_length) {
+  struct jpeg_error_mgr jerr;
+  jerr.error_exit = _error_do_nothing;
+  jerr.emit_message = _error_do_nothing1;
+  jerr.output_message = _error_do_nothing;
+  jerr.format_message = _error_do_nothing2;
+  jerr.reset_error_mgr = _error_do_nothing;
+
+  struct jpeg_compress_struct cinfo;
+  memset(&cinfo, 0, sizeof(cinfo));
+  cinfo.err = &jerr;
+  jpeg_create_compress(&cinfo);
+  int Bpp = pSource->GetBPP() / 8;
+  FX_DWORD nComponents = Bpp >= 3 ? (pSource->IsCmykImage() ? 4 : 3) : 1;
+  FX_DWORD pitch = pSource->GetPitch();
+  FX_DWORD width = pdfium::base::checked_cast<FX_DWORD>(pSource->GetWidth());
+  FX_DWORD height = pdfium::base::checked_cast<FX_DWORD>(pSource->GetHeight());
+  FX_SAFE_DWORD safe_buf_len = width;
+  safe_buf_len *= height;
+  safe_buf_len *= nComponents;
+  safe_buf_len += 1024;
+  if (icc_length) {
+    safe_buf_len += 255 * 18;
+    safe_buf_len += icc_length;
+  }
+  FX_DWORD dest_buf_length = 0;
+  if (!safe_buf_len.IsValid()) {
+    dest_buf = nullptr;
+  } else {
+    dest_buf_length = safe_buf_len.ValueOrDie();
+    dest_buf = FX_TryAlloc(uint8_t, dest_buf_length);
+    const int MIN_TRY_BUF_LEN = 1024;
+    while (!dest_buf && dest_buf_length > MIN_TRY_BUF_LEN) {
+      dest_buf_length >>= 1;
+      dest_buf = FX_TryAlloc(uint8_t, dest_buf_length);
+    }
+  }
+  if (!dest_buf) {
+    FX_OutOfMemoryTerminate();
+  }
+  struct jpeg_destination_mgr dest;
+  dest.init_destination = _dest_do_nothing;
+  dest.term_destination = _dest_do_nothing;
+  dest.empty_output_buffer = _dest_empty;
+  dest.next_output_byte = dest_buf;
+  dest.free_in_buffer = dest_buf_length;
+  cinfo.dest = &dest;
+  cinfo.image_width = width;
+  cinfo.image_height = height;
+  cinfo.input_components = nComponents;
+  if (nComponents == 1) {
+    cinfo.in_color_space = JCS_GRAYSCALE;
+  } else if (nComponents == 3) {
+    cinfo.in_color_space = JCS_RGB;
+  } else {
+    cinfo.in_color_space = JCS_CMYK;
+  }
+  uint8_t* line_buf = NULL;
+  if (nComponents > 1) {
+    line_buf = FX_Alloc2D(uint8_t, width, nComponents);
+  }
+  jpeg_set_defaults(&cinfo);
+  if (quality != 75) {
+    jpeg_set_quality(&cinfo, quality, TRUE);
+  }
+  jpeg_start_compress(&cinfo, TRUE);
+  _JpegEmbedIccProfile(&cinfo, icc_buf, icc_length);
+  JSAMPROW row_pointer[1];
+  JDIMENSION row;
+  while (cinfo.next_scanline < cinfo.image_height) {
+    const uint8_t* src_scan = pSource->GetScanline(cinfo.next_scanline);
+    if (nComponents > 1) {
+      uint8_t* dest_scan = line_buf;
+      if (nComponents == 3) {
+        for (int i = 0; i < width; i++) {
+          dest_scan[0] = src_scan[2];
+          dest_scan[1] = src_scan[1];
+          dest_scan[2] = src_scan[0];
+          dest_scan += 3;
+          src_scan += Bpp;
         }
-        FX_DWORD offset = 0;
-        while (offset < src_size - 1) {
-            if (src_buf[offset] == 0xff && src_buf[offset + 1] == 0xd8) {
-                src_buf += offset;
-                src_size -= offset;
-                return;
-            }
-            offset ++;
+      } else {
+        for (int i = 0; i < pitch; i++) {
+          *dest_scan++ = ~*src_scan++;
         }
+      }
+      row_pointer[0] = line_buf;
+    } else {
+      row_pointer[0] = (uint8_t*)src_scan;
     }
-};
-extern "C" {
-    static void _src_do_nothing(struct jpeg_decompress_struct* cinfo) {}
-};
-extern "C" {
-    static void _error_fatal(j_common_ptr cinfo)
-    {
-        longjmp(*(jmp_buf*)cinfo->client_data, -1);
+    row = cinfo.next_scanline;
+    jpeg_write_scanlines(&cinfo, row_pointer, 1);
+    if (cinfo.next_scanline == row) {
+      dest_buf =
+          FX_Realloc(uint8_t, dest_buf, dest_buf_length + JPEG_BLOCK_SIZE);
+      dest.next_output_byte = dest_buf + dest_buf_length - dest.free_in_buffer;
+      dest_buf_length += JPEG_BLOCK_SIZE;
+      dest.free_in_buffer += JPEG_BLOCK_SIZE;
     }
-};
-extern "C" {
-    static void _src_skip_data(struct jpeg_decompress_struct* cinfo, long num)
-    {
-        if (num > (long)cinfo->src->bytes_in_buffer) {
-            _error_fatal((j_common_ptr)cinfo);
-        }
-        cinfo->src->next_input_byte += num;
-        cinfo->src->bytes_in_buffer -= num;
+  }
+  jpeg_finish_compress(&cinfo);
+  jpeg_destroy_compress(&cinfo);
+  if (line_buf) {
+    FX_Free(line_buf);
+  }
+  dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer;
+}
+static FX_BOOL _JpegLoadInfo(const uint8_t* src_buf,
+                             FX_DWORD src_size,
+                             int& width,
+                             int& height,
+                             int& num_components,
+                             int& bits_per_components,
+                             FX_BOOL& color_transform,
+                             uint8_t** icc_buf_ptr,
+                             FX_DWORD* icc_length) {
+  _JpegScanSOI(src_buf, src_size);
+  struct jpeg_decompress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+  jerr.error_exit = _error_fatal;
+  jerr.emit_message = _error_do_nothing1;
+  jerr.output_message = _error_do_nothing;
+  jerr.format_message = _error_do_nothing2;
+  jerr.reset_error_mgr = _error_do_nothing;
+  jerr.trace_level = 0;
+  cinfo.err = &jerr;
+  jmp_buf mark;
+  cinfo.client_data = &mark;
+  if (setjmp(mark) == -1) {
+    return FALSE;
+  }
+  jpeg_create_decompress(&cinfo);
+  struct jpeg_source_mgr src;
+  src.init_source = _src_do_nothing;
+  src.term_source = _src_do_nothing;
+  src.skip_input_data = _src_skip_data;
+  src.fill_input_buffer = _src_fill_buffer;
+  src.resync_to_restart = _src_resync;
+  src.bytes_in_buffer = src_size;
+  src.next_input_byte = src_buf;
+  cinfo.src = &src;
+  if (setjmp(mark) == -1) {
+    jpeg_destroy_decompress(&cinfo);
+    return FALSE;
+  }
+  if (icc_buf_ptr && icc_length) {
+    jpeg_save_markers(&cinfo, JPEG_MARKER_ICC, JPEG_MARKER_MAXSIZE);
+  }
+  int ret = jpeg_read_header(&cinfo, TRUE);
+  if (ret != JPEG_HEADER_OK) {
+    jpeg_destroy_decompress(&cinfo);
+    return FALSE;
+  }
+  width = cinfo.image_width;
+  height = cinfo.image_height;
+  num_components = cinfo.num_components;
+  color_transform =
+      cinfo.jpeg_color_space == JCS_YCbCr || cinfo.jpeg_color_space == JCS_YCCK;
+  bits_per_components = cinfo.data_precision;
+  if (icc_buf_ptr != NULL) {
+    *icc_buf_ptr = NULL;
+  }
+  if (icc_length != NULL) {
+    *icc_length = 0;
+  }
+  jpeg_destroy_decompress(&cinfo);
+  return TRUE;
+}
+class CCodec_JpegDecoder : public CCodec_ScanlineDecoder {
+ public:
+  CCodec_JpegDecoder();
+  ~CCodec_JpegDecoder();
+  FX_BOOL Create(const uint8_t* src_buf,
+                 FX_DWORD src_size,
+                 int width,
+                 int height,
+                 int nComps,
+                 FX_BOOL ColorTransform,
+                 IFX_JpegProvider* pJP);
+  virtual void Destroy() { delete this; }
+  virtual void v_DownScale(int dest_width, int dest_height);
+  virtual FX_BOOL v_Rewind();
+  virtual uint8_t* v_GetNextLine();
+  virtual FX_DWORD GetSrcOffset();
+  jmp_buf m_JmpBuf;
+  struct jpeg_decompress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+  struct jpeg_source_mgr src;
+  const uint8_t* m_SrcBuf;
+  FX_DWORD m_SrcSize;
+  uint8_t* m_pScanlineBuf;
+  FX_BOOL InitDecode();
+  FX_BOOL m_bInited, m_bStarted, m_bJpegTransform;
+
+ protected:
+  IFX_JpegProvider* m_pExtProvider;
+  void* m_pExtContext;
+  FX_DWORD m_nDefaultScaleDenom;
+};
+CCodec_JpegDecoder::CCodec_JpegDecoder() {
+  m_pScanlineBuf = NULL;
+  m_DownScale = 1;
+  m_bStarted = FALSE;
+  m_bInited = FALSE;
+  m_pExtProvider = NULL;
+  m_pExtContext = NULL;
+  FXSYS_memset(&cinfo, 0, sizeof(cinfo));
+  FXSYS_memset(&jerr, 0, sizeof(jerr));
+  FXSYS_memset(&src, 0, sizeof(src));
+  m_nDefaultScaleDenom = 1;
+}
+CCodec_JpegDecoder::~CCodec_JpegDecoder() {
+  if (m_pExtProvider) {
+    m_pExtProvider->DestroyDecoder(m_pExtContext);
+    return;
+  }
+  if (m_pScanlineBuf) {
+    FX_Free(m_pScanlineBuf);
+  }
+  if (m_bInited) {
+    jpeg_destroy_decompress(&cinfo);
+  }
+}
+FX_BOOL CCodec_JpegDecoder::InitDecode() {
+  cinfo.err = &jerr;
+  cinfo.client_data = &m_JmpBuf;
+  if (setjmp(m_JmpBuf) == -1) {
+    return FALSE;
+  }
+  jpeg_create_decompress(&cinfo);
+  m_bInited = TRUE;
+  cinfo.src = &src;
+  src.bytes_in_buffer = m_SrcSize;
+  src.next_input_byte = m_SrcBuf;
+  if (setjmp(m_JmpBuf) == -1) {
+    jpeg_destroy_decompress(&cinfo);
+    m_bInited = FALSE;
+    return FALSE;
+  }
+  cinfo.image_width = m_OrigWidth;
+  cinfo.image_height = m_OrigHeight;
+  int ret = jpeg_read_header(&cinfo, TRUE);
+  if (ret != JPEG_HEADER_OK) {
+    return FALSE;
+  }
+  if (cinfo.saw_Adobe_marker) {
+    m_bJpegTransform = TRUE;
+  }
+  if (cinfo.num_components == 3 && !m_bJpegTransform) {
+    cinfo.out_color_space = cinfo.jpeg_color_space;
+  }
+  m_OrigWidth = cinfo.image_width;
+  m_OrigHeight = cinfo.image_height;
+  m_OutputWidth = m_OrigWidth;
+  m_OutputHeight = m_OrigHeight;
+  m_nDefaultScaleDenom = cinfo.scale_denom;
+  return TRUE;
+}
+FX_BOOL CCodec_JpegDecoder::Create(const uint8_t* src_buf,
+                                   FX_DWORD src_size,
+                                   int width,
+                                   int height,
+                                   int nComps,
+                                   FX_BOOL ColorTransform,
+                                   IFX_JpegProvider* pJP) {
+  if (pJP) {
+    m_pExtProvider = pJP;
+    m_pExtContext = m_pExtProvider->CreateDecoder(
+        src_buf, src_size, width, height, nComps, ColorTransform);
+    return m_pExtContext != NULL;
+  }
+  _JpegScanSOI(src_buf, src_size);
+  m_SrcBuf = src_buf;
+  m_SrcSize = src_size;
+  jerr.error_exit = _error_fatal;
+  jerr.emit_message = _error_do_nothing1;
+  jerr.output_message = _error_do_nothing;
+  jerr.format_message = _error_do_nothing2;
+  jerr.reset_error_mgr = _error_do_nothing;
+  src.init_source = _src_do_nothing;
+  src.term_source = _src_do_nothing;
+  src.skip_input_data = _src_skip_data;
+  src.fill_input_buffer = _src_fill_buffer;
+  src.resync_to_restart = _src_resync;
+  m_bJpegTransform = ColorTransform;
+  if (src_size > 1 &&
+      FXSYS_memcmp(src_buf + src_size - 2, "\xFF\xD9", 2) != 0) {
+    ((uint8_t*)src_buf)[src_size - 2] = 0xFF;
+    ((uint8_t*)src_buf)[src_size - 1] = 0xD9;
+  }
+  m_OutputWidth = m_OrigWidth = width;
+  m_OutputHeight = m_OrigHeight = height;
+  if (!InitDecode()) {
+    return FALSE;
+  }
+  if (cinfo.num_components < nComps) {
+    return FALSE;
+  }
+  if ((int)cinfo.image_width < width) {
+    return FALSE;
+  }
+  m_Pitch = (cinfo.image_width * cinfo.num_components + 3) / 4 * 4;
+  m_pScanlineBuf = FX_Alloc(uint8_t, m_Pitch);
+  m_nComps = cinfo.num_components;
+  m_bpc = 8;
+  m_bColorTransformed = FALSE;
+  m_bStarted = FALSE;
+  return TRUE;
+}
+extern "C" {
+int32_t FX_GetDownsampleRatio(int32_t originWidth,
+                              int32_t originHeight,
+                              int32_t downsampleWidth,
+                              int32_t downsampleHeight) {
+  int iratio_w = originWidth / downsampleWidth;
+  int iratio_h = originHeight / downsampleHeight;
+  int ratio = (iratio_w > iratio_h) ? iratio_h : iratio_w;
+  if (ratio >= 8) {
+    return 8;
+  }
+  if (ratio >= 4) {
+    return 4;
+  }
+  if (ratio >= 2) {
+    return 2;
+  }
+  return 1;
+}
+}
+void CCodec_JpegDecoder::v_DownScale(int dest_width, int dest_height) {
+  if (m_pExtProvider) {
+    m_pExtProvider->DownScale(m_pExtContext, dest_width, dest_height);
+    return;
+  }
+  int old_scale = m_DownScale;
+  m_DownScale =
+      FX_GetDownsampleRatio(m_OrigWidth, m_OrigHeight, dest_width, dest_height);
+  m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale;
+  m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale;
+  m_Pitch = (m_OutputWidth * m_nComps + 3) / 4 * 4;
+  if (old_scale != m_DownScale) {
+    m_NextLine = -1;
+  }
+}
+FX_BOOL CCodec_JpegDecoder::v_Rewind() {
+  if (m_pExtProvider) {
+    return m_pExtProvider->Rewind(m_pExtContext);
+  }
+  if (m_bStarted) {
+    jpeg_destroy_decompress(&cinfo);
+    if (!InitDecode()) {
+      return FALSE;
     }
-};
-extern "C" {
-    static boolean _src_fill_buffer(j_decompress_ptr cinfo)
-    {
-        return 0;
+  }
+  if (setjmp(m_JmpBuf) == -1) {
+    return FALSE;
+  }
+  cinfo.scale_denom = m_nDefaultScaleDenom * m_DownScale;
+  m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale;
+  m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale;
+  if (!jpeg_start_decompress(&cinfo)) {
+    jpeg_destroy_decompress(&cinfo);
+    return FALSE;
+  }
+  if ((int)cinfo.output_width > m_OrigWidth) {
+    FXSYS_assert(FALSE);
+    return FALSE;
+  }
+  m_bStarted = TRUE;
+  return TRUE;
+}
+uint8_t* CCodec_JpegDecoder::v_GetNextLine() {
+  if (m_pExtProvider) {
+    return m_pExtProvider->GetNextLine(m_pExtContext);
+  }
+  int nlines = jpeg_read_scanlines(&cinfo, &m_pScanlineBuf, 1);
+  if (nlines < 1) {
+    return NULL;
+  }
+  return m_pScanlineBuf;
+}
+FX_DWORD CCodec_JpegDecoder::GetSrcOffset() {
+  if (m_pExtProvider) {
+    return m_pExtProvider->GetSrcOffset(m_pExtContext);
+  }
+  return (FX_DWORD)(m_SrcSize - src.bytes_in_buffer);
+}
+ICodec_ScanlineDecoder* CCodec_JpegModule::CreateDecoder(
+    const uint8_t* src_buf,
+    FX_DWORD src_size,
+    int width,
+    int height,
+    int nComps,
+    FX_BOOL ColorTransform) {
+  if (src_buf == NULL || src_size == 0) {
+    return NULL;
+  }
+  CCodec_JpegDecoder* pDecoder = new CCodec_JpegDecoder;
+  if (!pDecoder->Create(src_buf, src_size, width, height, nComps,
+                        ColorTransform, m_pExtProvider)) {
+    delete pDecoder;
+    return NULL;
+  }
+  return pDecoder;
+}
+FX_BOOL CCodec_JpegModule::LoadInfo(const uint8_t* src_buf,
+                                    FX_DWORD src_size,
+                                    int& width,
+                                    int& height,
+                                    int& num_components,
+                                    int& bits_per_components,
+                                    FX_BOOL& color_transform,
+                                    uint8_t** icc_buf_ptr,
+                                    FX_DWORD* icc_length) {
+  if (m_pExtProvider) {
+    return m_pExtProvider->LoadInfo(src_buf, src_size, width, height,
+                                    num_components, bits_per_components,
+                                    color_transform, icc_buf_ptr, icc_length);
+  }
+  return _JpegLoadInfo(src_buf, src_size, width, height, num_components,
+                       bits_per_components, color_transform, icc_buf_ptr,
+                       icc_length);
+}
+FX_BOOL CCodec_JpegModule::Encode(const CFX_DIBSource* pSource,
+                                  uint8_t*& dest_buf,
+                                  FX_STRSIZE& dest_size,
+                                  int quality,
+                                  const uint8_t* icc_buf,
+                                  FX_DWORD icc_length) {
+  if (m_pExtProvider) {
+    return m_pExtProvider->Encode(pSource, dest_buf, dest_size, quality,
+                                  icc_buf, icc_length);
+  }
+  if (pSource->GetBPP() < 8 || pSource->GetPalette() != NULL) {
+    ASSERT(pSource->GetBPP() >= 8 && pSource->GetPalette() == NULL);
+    return FALSE;
+  }
+  _JpegEncode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length);
+  return TRUE;
+}
+struct FXJPEG_Context {
+  jmp_buf m_JumpMark;
+  jpeg_decompress_struct m_Info;
+  jpeg_error_mgr m_ErrMgr;
+  jpeg_source_mgr m_SrcMgr;
+  unsigned int m_SkipSize;
+  void* (*m_AllocFunc)(unsigned int);
+  void (*m_FreeFunc)(void*);
+};
+extern "C" {
+static void _error_fatal1(j_common_ptr cinfo) {
+  longjmp(((FXJPEG_Context*)cinfo->client_data)->m_JumpMark, -1);
+}
+};
+extern "C" {
+static void _src_skip_data1(struct jpeg_decompress_struct* cinfo, long num) {
+  if (cinfo->src->bytes_in_buffer < (size_t)num) {
+    ((FXJPEG_Context*)cinfo->client_data)->m_SkipSize =
+        (unsigned int)(num - cinfo->src->bytes_in_buffer);
+    cinfo->src->bytes_in_buffer = 0;
+  } else {
+    cinfo->src->next_input_byte += num;
+    cinfo->src->bytes_in_buffer -= num;
+  }
+}
+};
+static void* jpeg_alloc_func(unsigned int size) {
+  return FX_Alloc(char, size);
+}
+static void jpeg_free_func(void* p) {
+  FX_Free(p);
+}
+void* CCodec_JpegModule::Start() {
+  if (m_pExtProvider) {
+    return m_pExtProvider->Start();
+  }
+  FXJPEG_Context* p =
+      (FXJPEG_Context*)FX_Alloc(uint8_t, sizeof(FXJPEG_Context));
+  p->m_AllocFunc = jpeg_alloc_func;
+  p->m_FreeFunc = jpeg_free_func;
+  p->m_ErrMgr.error_exit = _error_fatal1;
+  p->m_ErrMgr.emit_message = _error_do_nothing1;
+  p->m_ErrMgr.output_message = _error_do_nothing;
+  p->m_ErrMgr.format_message = _error_do_nothing2;
+  p->m_ErrMgr.reset_error_mgr = _error_do_nothing;
+  p->m_SrcMgr.init_source = _src_do_nothing;
+  p->m_SrcMgr.term_source = _src_do_nothing;
+  p->m_SrcMgr.skip_input_data = _src_skip_data1;
+  p->m_SrcMgr.fill_input_buffer = _src_fill_buffer;
+  p->m_SrcMgr.resync_to_restart = _src_resync;
+  p->m_Info.client_data = p;
+  p->m_Info.err = &p->m_ErrMgr;
+  if (setjmp(p->m_JumpMark) == -1) {
+    return 0;
+  }
+  jpeg_create_decompress(&p->m_Info);
+  p->m_Info.src = &p->m_SrcMgr;
+  p->m_SkipSize = 0;
+  return p;
+}
+void CCodec_JpegModule::Finish(void* pContext) {
+  if (m_pExtProvider) {
+    m_pExtProvider->Finish(pContext);
+    return;
+  }
+  FXJPEG_Context* p = (FXJPEG_Context*)pContext;
+  jpeg_destroy_decompress(&p->m_Info);
+  p->m_FreeFunc(p);
+}
+void CCodec_JpegModule::Input(void* pContext,
+                              const unsigned char* src_buf,
+                              FX_DWORD src_size) {
+  if (m_pExtProvider) {
+    m_pExtProvider->Input(pContext, src_buf, src_size);
+    return;
+  }
+  FXJPEG_Context* p = (FXJPEG_Context*)pContext;
+  if (p->m_SkipSize) {
+    if (p->m_SkipSize > src_size) {
+      p->m_SrcMgr.bytes_in_buffer = 0;
+      p->m_SkipSize -= src_size;
+      return;
     }
-};
-extern "C" {
-    static boolean _src_resync(j_decompress_ptr cinfo, int desired)
-    {
-        return 0;
+    src_size -= p->m_SkipSize;
+    src_buf += p->m_SkipSize;
+    p->m_SkipSize = 0;
+  }
+  p->m_SrcMgr.next_input_byte = src_buf;
+  p->m_SrcMgr.bytes_in_buffer = src_size;
+}
+int CCodec_JpegModule::ReadHeader(void* pContext,
+                                  int* width,
+                                  int* height,
+                                  int* nComps) {
+  if (m_pExtProvider) {
+    return m_pExtProvider->ReadHeader(pContext, width, height, nComps);
+  }
+  FXJPEG_Context* p = (FXJPEG_Context*)pContext;
+  if (setjmp(p->m_JumpMark) == -1) {
+    return 1;
+  }
+  int ret = jpeg_read_header(&p->m_Info, true);
+  if (ret == JPEG_SUSPENDED) {
+    return 2;
+  }
+  if (ret != JPEG_HEADER_OK) {
+    return 1;
+  }
+  *width = p->m_Info.image_width;
+  *height = p->m_Info.image_height;
+  *nComps = p->m_Info.num_components;
+  return 0;
+}
+int CCodec_JpegModule::StartScanline(void* pContext, int down_scale) {
+  if (m_pExtProvider) {
+    return m_pExtProvider->StartScanline(pContext, down_scale);
+  }
+  FXJPEG_Context* p = (FXJPEG_Context*)pContext;
+  if (setjmp(p->m_JumpMark) == -1) {
+    return 0;
+  }
+  p->m_Info.scale_denom = down_scale;
+  return jpeg_start_decompress(&p->m_Info);
+}
+FX_BOOL CCodec_JpegModule::ReadScanline(void* pContext,
+                                        unsigned char* dest_buf) {
+  if (m_pExtProvider) {
+    return m_pExtProvider->ReadScanline(pContext, dest_buf);
+  }
+  FXJPEG_Context* p = (FXJPEG_Context*)pContext;
+  if (setjmp(p->m_JumpMark) == -1) {
+    return FALSE;
+  }
+  int nlines = jpeg_read_scanlines(&p->m_Info, &dest_buf, 1);
+  return nlines == 1;
+}
+FX_DWORD CCodec_JpegModule::GetAvailInput(void* pContext,
+                                          uint8_t** avail_buf_ptr) {
+  if (m_pExtProvider) {
+    return m_pExtProvider->GetAvailInput(pContext, avail_buf_ptr);
+  }
+  if (avail_buf_ptr != NULL) {
+    *avail_buf_ptr = NULL;
+    if (((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) {
+      *avail_buf_ptr =
+          (uint8_t*)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte;
     }
-};
-extern "C" {
-    static void _error_do_nothing(j_common_ptr cinfo) {}
-};
-extern "C" {
-    static void _error_do_nothing1(j_common_ptr cinfo, int) {}
-};
-extern "C" {
-    static void _error_do_nothing2(j_common_ptr cinfo, char*) {}
-};
-#define JPEG_MARKER_EXIF                (JPEG_APP0 + 1)
-#define JPEG_MARKER_ICC                 (JPEG_APP0 + 2)
-#define JPEG_MARKER_AUTHORTIME  (JPEG_APP0 + 3)
-#define JPEG_MARKER_MAXSIZE     0xFFFF
-#define JPEG_OVERHEAD_LEN       14
-static  FX_BOOL _JpegEmbedIccProfile(j_compress_ptr cinfo, const uint8_t* icc_buf_ptr, FX_DWORD icc_length)
-{
-    if(icc_buf_ptr == NULL || icc_length == 0) {
-        return FALSE;
-    }
-    FX_DWORD icc_segment_size = (JPEG_MARKER_MAXSIZE - 2 - JPEG_OVERHEAD_LEN);
-    FX_DWORD icc_segment_num = (icc_length / icc_segment_size) + 1;
-    if (icc_segment_num > 255)  {
-        return FALSE;
-    }
-    FX_DWORD icc_data_length = JPEG_OVERHEAD_LEN + (icc_segment_num > 1 ? icc_segment_size : icc_length);
-    uint8_t* icc_data = FX_Alloc(uint8_t, icc_data_length);
-    FXSYS_memcpy(icc_data, "\x49\x43\x43\x5f\x50\x52\x4f\x46\x49\x4c\x45\x00", 12);
-    icc_data[13] = (uint8_t)icc_segment_num;
-    for (uint8_t i = 0; i < (icc_segment_num - 1); i++) {
-        icc_data[12] = i + 1;
-        FXSYS_memcpy(icc_data + JPEG_OVERHEAD_LEN, icc_buf_ptr + i * icc_segment_size, icc_segment_size);
-        jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data, icc_data_length);
-    }
-    icc_data[12] = (uint8_t)icc_segment_num;
-    FX_DWORD icc_size = (icc_segment_num - 1) * icc_segment_size;
-    FXSYS_memcpy(icc_data + JPEG_OVERHEAD_LEN, icc_buf_ptr + icc_size, icc_length - icc_size);
-    jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data, JPEG_OVERHEAD_LEN + icc_length - icc_size);
-    FX_Free(icc_data);
-    return TRUE;
-}
-extern "C" {
-    static void _dest_do_nothing(j_compress_ptr cinfo) {}
-};
-extern "C" {
-    static boolean _dest_empty(j_compress_ptr cinfo)
-    {
-        return FALSE;
-    }
-};
-#define JPEG_BLOCK_SIZE 1048576
-static void _JpegEncode(const CFX_DIBSource* pSource, uint8_t*& dest_buf, FX_STRSIZE& dest_size, int quality, const uint8_t* icc_buf, FX_DWORD icc_length)
-{
-    struct jpeg_error_mgr jerr;
-    jerr.error_exit = _error_do_nothing;
-    jerr.emit_message = _error_do_nothing1;
-    jerr.output_message = _error_do_nothing;
-    jerr.format_message = _error_do_nothing2;
-    jerr.reset_error_mgr = _error_do_nothing;
-
-    struct jpeg_compress_struct cinfo;
-    memset(&cinfo, 0, sizeof(cinfo));
-    cinfo.err = &jerr;
-    jpeg_create_compress(&cinfo);
-    int Bpp = pSource->GetBPP() / 8;
-    FX_DWORD nComponents = Bpp >= 3 ? (pSource->IsCmykImage() ? 4 : 3) : 1;
-    FX_DWORD pitch = pSource->GetPitch();
-    FX_DWORD width = pdfium::base::checked_cast<FX_DWORD>(pSource->GetWidth());
-    FX_DWORD height = pdfium::base::checked_cast<FX_DWORD>(pSource->GetHeight());
-    FX_SAFE_DWORD safe_buf_len = width;
-    safe_buf_len *= height;
-    safe_buf_len *= nComponents;
-    safe_buf_len += 1024;
-    if (icc_length) {
-        safe_buf_len += 255 * 18;
-        safe_buf_len += icc_length;
-    }
-    FX_DWORD dest_buf_length = 0;
-    if (!safe_buf_len.IsValid()) {
-        dest_buf = nullptr;
-    } else {
-        dest_buf_length = safe_buf_len.ValueOrDie();
-        dest_buf = FX_TryAlloc(uint8_t, dest_buf_length);
-        const int MIN_TRY_BUF_LEN = 1024;
-        while (!dest_buf && dest_buf_length > MIN_TRY_BUF_LEN) {
-            dest_buf_length >>= 1;
-            dest_buf = FX_TryAlloc(uint8_t, dest_buf_length);
-        }
-    }
-    if (!dest_buf) {
-        FX_OutOfMemoryTerminate();
-    }
-    struct jpeg_destination_mgr dest;
-    dest.init_destination = _dest_do_nothing;
-    dest.term_destination = _dest_do_nothing;
-    dest.empty_output_buffer = _dest_empty;
-    dest.next_output_byte = dest_buf;
-    dest.free_in_buffer = dest_buf_length;
-    cinfo.dest = &dest;
-    cinfo.image_width = width;
-    cinfo.image_height = height;
-    cinfo.input_components = nComponents;
-    if (nComponents == 1) {
-        cinfo.in_color_space = JCS_GRAYSCALE;
-    } else if (nComponents == 3) {
-        cinfo.in_color_space = JCS_RGB;
-    } else {
-        cinfo.in_color_space = JCS_CMYK;
-    }
-    uint8_t* line_buf = NULL;
-    if (nComponents > 1) {
-        line_buf = FX_Alloc2D(uint8_t, width, nComponents);
-    }
-    jpeg_set_defaults(&cinfo);
-    if(quality != 75) {
-        jpeg_set_quality(&cinfo, quality, TRUE);
-    }
-    jpeg_start_compress(&cinfo, TRUE);
-    _JpegEmbedIccProfile(&cinfo, icc_buf, icc_length);
-    JSAMPROW row_pointer[1];
-    JDIMENSION row;
-    while (cinfo.next_scanline < cinfo.image_height) {
-        const uint8_t* src_scan = pSource->GetScanline(cinfo.next_scanline);
-        if (nComponents > 1) {
-            uint8_t* dest_scan = line_buf;
-            if (nComponents == 3) {
-                for (int i = 0; i < width; i ++) {
-                    dest_scan[0] = src_scan[2];
-                    dest_scan[1] = src_scan[1];
-                    dest_scan[2] = src_scan[0];
-                    dest_scan += 3;
-                    src_scan += Bpp;
-                }
-            } else {
-                for (int i = 0; i < pitch; i ++) {
-                    *dest_scan++ = ~*src_scan++;
-                }
-            }
-            row_pointer[0] = line_buf;
-        } else {
-            row_pointer[0] = (uint8_t*)src_scan;
-        }
-        row = cinfo.next_scanline;
-        jpeg_write_scanlines(&cinfo, row_pointer, 1);
-        if (cinfo.next_scanline == row) {
-            dest_buf = FX_Realloc(uint8_t, dest_buf, dest_buf_length + JPEG_BLOCK_SIZE);
-            dest.next_output_byte = dest_buf + dest_buf_length - dest.free_in_buffer;
-            dest_buf_length += JPEG_BLOCK_SIZE;
-            dest.free_in_buffer += JPEG_BLOCK_SIZE;
-        }
-    }
-    jpeg_finish_compress(&cinfo);
-    jpeg_destroy_compress(&cinfo);
-    if (line_buf) {
-        FX_Free(line_buf);
-    }
-    dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer;
-}
-static FX_BOOL _JpegLoadInfo(const uint8_t* src_buf, FX_DWORD src_size, int& width, int& height,
-                             int& num_components, int& bits_per_components, FX_BOOL& color_transform,
-                             uint8_t** icc_buf_ptr, FX_DWORD* icc_length)
-{
-    _JpegScanSOI(src_buf, src_size);
-    struct jpeg_decompress_struct cinfo;
-    struct jpeg_error_mgr jerr;
-    jerr.error_exit = _error_fatal;
-    jerr.emit_message = _error_do_nothing1;
-    jerr.output_message = _error_do_nothing;
-    jerr.format_message = _error_do_nothing2;
-    jerr.reset_error_mgr = _error_do_nothing;
-    jerr.trace_level = 0;
-    cinfo.err = &jerr;
-    jmp_buf mark;
-    cinfo.client_data = &mark;
-    if (setjmp(mark) == -1) {
-        return FALSE;
-    }
-    jpeg_create_decompress(&cinfo);
-    struct jpeg_source_mgr src;
-    src.init_source = _src_do_nothing;
-    src.term_source = _src_do_nothing;
-    src.skip_input_data = _src_skip_data;
-    src.fill_input_buffer = _src_fill_buffer;
-    src.resync_to_restart = _src_resync;
-    src.bytes_in_buffer = src_size;
-    src.next_input_byte = src_buf;
-    cinfo.src = &src;
-    if (setjmp(mark) == -1) {
-        jpeg_destroy_decompress(&cinfo);
-        return FALSE;
-    }
-    if(icc_buf_ptr && icc_length) {
-        jpeg_save_markers(&cinfo, JPEG_MARKER_ICC, JPEG_MARKER_MAXSIZE);
-    }
-    int ret = jpeg_read_header(&cinfo, TRUE);
-    if (ret != JPEG_HEADER_OK) {
-        jpeg_destroy_decompress(&cinfo);
-        return FALSE;
-    }
-    width = cinfo.image_width;
-    height = cinfo.image_height;
-    num_components = cinfo.num_components;
-    color_transform = cinfo.jpeg_color_space == JCS_YCbCr || cinfo.jpeg_color_space == JCS_YCCK;
-    bits_per_components = cinfo.data_precision;
-    if(icc_buf_ptr != NULL) {
-        *icc_buf_ptr = NULL;
-    }
-    if(icc_length != NULL) {
-        *icc_length = 0;
-    }
-    jpeg_destroy_decompress(&cinfo);
-    return TRUE;
-}
-class CCodec_JpegDecoder : public CCodec_ScanlineDecoder
-{
-public:
-    CCodec_JpegDecoder();
-    ~CCodec_JpegDecoder();
-    FX_BOOL                             Create(const uint8_t* src_buf, FX_DWORD src_size, int width, int height, int nComps,
-                               FX_BOOL ColorTransform, IFX_JpegProvider* pJP);
-    virtual void                Destroy()
-    {
-        delete this;
-    }
-    virtual void                v_DownScale(int dest_width, int dest_height);
-    virtual FX_BOOL             v_Rewind();
-    virtual uint8_t*    v_GetNextLine();
-    virtual FX_DWORD    GetSrcOffset();
-    jmp_buf             m_JmpBuf;
-    struct jpeg_decompress_struct cinfo;
-    struct jpeg_error_mgr jerr;
-    struct jpeg_source_mgr src;
-    const uint8_t*      m_SrcBuf;
-    FX_DWORD    m_SrcSize;
-    uint8_t*    m_pScanlineBuf;
-    FX_BOOL             InitDecode();
-    FX_BOOL             m_bInited, m_bStarted, m_bJpegTransform;
-protected:
-    IFX_JpegProvider*   m_pExtProvider;
-    void*                               m_pExtContext;
-    FX_DWORD                    m_nDefaultScaleDenom;
-};
-CCodec_JpegDecoder::CCodec_JpegDecoder()
-{
-    m_pScanlineBuf = NULL;
-    m_DownScale = 1;
-    m_bStarted = FALSE;
-    m_bInited = FALSE;
-    m_pExtProvider = NULL;
-    m_pExtContext = NULL;
-    FXSYS_memset(&cinfo, 0, sizeof(cinfo));
-    FXSYS_memset(&jerr, 0, sizeof(jerr));
-    FXSYS_memset(&src, 0, sizeof(src));
-    m_nDefaultScaleDenom = 1;
-}
-CCodec_JpegDecoder::~CCodec_JpegDecoder()
-{
-    if (m_pExtProvider) {
-        m_pExtProvider->DestroyDecoder(m_pExtContext);
-        return;
-    }
-    if (m_pScanlineBuf) {
-        FX_Free(m_pScanlineBuf);
-    }
-    if (m_bInited) {
-        jpeg_destroy_decompress(&cinfo);
-    }
-}
-FX_BOOL CCodec_JpegDecoder::InitDecode()
-{
-    cinfo.err = &jerr;
-    cinfo.client_data = &m_JmpBuf;
-    if (setjmp(m_JmpBuf) == -1) {
-        return FALSE;
-    }
-    jpeg_create_decompress(&cinfo);
-    m_bInited = TRUE;
-    cinfo.src = &src;
-    src.bytes_in_buffer = m_SrcSize;
-    src.next_input_byte = m_SrcBuf;
-    if (setjmp(m_JmpBuf) == -1) {
-        jpeg_destroy_decompress(&cinfo);
-        m_bInited = FALSE;
-        return FALSE;
-    }
-    cinfo.image_width = m_OrigWidth;
-    cinfo.image_height = m_OrigHeight;
-    int ret = jpeg_read_header(&cinfo, TRUE);
-    if (ret != JPEG_HEADER_OK) {
-        return FALSE;
-    }
-    if (cinfo.saw_Adobe_marker) {
-        m_bJpegTransform = TRUE;
-    }
-    if (cinfo.num_components == 3 && !m_bJpegTransform) {
-        cinfo.out_color_space = cinfo.jpeg_color_space;
-    }
-    m_OrigWidth = cinfo.image_width;
-    m_OrigHeight = cinfo.image_height;
-    m_OutputWidth = m_OrigWidth;
-    m_OutputHeight = m_OrigHeight;
-    m_nDefaultScaleDenom = cinfo.scale_denom;
-    return TRUE;
-}
-FX_BOOL CCodec_JpegDecoder::Create(const uint8_t* src_buf, FX_DWORD src_size, int width, int height,
-                                   int nComps, FX_BOOL ColorTransform, IFX_JpegProvider* pJP)
-{
-    if (pJP) {
-        m_pExtProvider = pJP;
-        m_pExtContext = m_pExtProvider->CreateDecoder(src_buf, src_size, width, height, nComps, ColorTransform);
-        return m_pExtContext != NULL;
-    }
-    _JpegScanSOI(src_buf, src_size);
-    m_SrcBuf = src_buf;
-    m_SrcSize = src_size;
-    jerr.error_exit = _error_fatal;
-    jerr.emit_message = _error_do_nothing1;
-    jerr.output_message = _error_do_nothing;
-    jerr.format_message = _error_do_nothing2;
-    jerr.reset_error_mgr = _error_do_nothing;
-    src.init_source = _src_do_nothing;
-    src.term_source = _src_do_nothing;
-    src.skip_input_data = _src_skip_data;
-    src.fill_input_buffer = _src_fill_buffer;
-    src.resync_to_restart = _src_resync;
-    m_bJpegTransform = ColorTransform;
-    if(src_size > 1 && FXSYS_memcmp(src_buf + src_size - 2, "\xFF\xD9", 2) != 0) {
-        ((uint8_t*)src_buf)[src_size - 2] = 0xFF;
-        ((uint8_t*)src_buf)[src_size - 1] = 0xD9;
-    }
-    m_OutputWidth = m_OrigWidth = width;
-    m_OutputHeight = m_OrigHeight = height;
-    if (!InitDecode()) {
-        return FALSE;
-    }
-    if (cinfo.num_components < nComps) {
-        return FALSE;
-    }
-    if ((int)cinfo.image_width < width) {
-        return FALSE;
-    }
-    m_Pitch = (cinfo.image_width * cinfo.num_components + 3) / 4 * 4;
-    m_pScanlineBuf = FX_Alloc(uint8_t, m_Pitch);
-    m_nComps = cinfo.num_components;
-    m_bpc = 8;
-    m_bColorTransformed = FALSE;
-    m_bStarted = FALSE;
-    return TRUE;
-}
-extern "C" {
-    int32_t FX_GetDownsampleRatio(int32_t originWidth, int32_t originHeight, int32_t downsampleWidth, int32_t downsampleHeight)
-    {
-        int iratio_w = originWidth / downsampleWidth;
-        int iratio_h = originHeight / downsampleHeight;
-        int ratio = (iratio_w > iratio_h) ? iratio_h : iratio_w;
-        if (ratio >= 8) {
-            return 8;
-        }
-        if (ratio >= 4) {
-            return 4;
-        }
-        if (ratio >= 2) {
-            return 2;
-        }
-        return 1;
-    }
-}
-void CCodec_JpegDecoder::v_DownScale(int dest_width, int dest_height)
-{
-    if (m_pExtProvider) {
-        m_pExtProvider->DownScale(m_pExtContext, dest_width, dest_height);
-        return;
-    }
-    int old_scale = m_DownScale;
-    m_DownScale = FX_GetDownsampleRatio(m_OrigWidth, m_OrigHeight, dest_width, dest_height);
-    m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale;
-    m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale;
-    m_Pitch = (m_OutputWidth * m_nComps + 3) / 4 * 4;
-    if (old_scale != m_DownScale) {
-        m_NextLine = -1;
-    }
-}
-FX_BOOL CCodec_JpegDecoder::v_Rewind()
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->Rewind(m_pExtContext);
-    }
-    if (m_bStarted) {
-        jpeg_destroy_decompress(&cinfo);
-        if (!InitDecode()) {
-            return FALSE;
-        }
-    }
-    if (setjmp(m_JmpBuf) == -1) {
-        return FALSE;
-    }
-    cinfo.scale_denom = m_nDefaultScaleDenom * m_DownScale;
-    m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale;
-    m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale;
-    if (!jpeg_start_decompress(&cinfo)) {
-        jpeg_destroy_decompress(&cinfo);
-        return FALSE;
-    }
-    if ((int)cinfo.output_width > m_OrigWidth) {
-        FXSYS_assert(FALSE);
-        return FALSE;
-    }
-    m_bStarted = TRUE;
-    return TRUE;
-}
-uint8_t* CCodec_JpegDecoder::v_GetNextLine()
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->GetNextLine(m_pExtContext);
-    }
-    int nlines = jpeg_read_scanlines(&cinfo, &m_pScanlineBuf, 1);
-    if (nlines < 1) {
-        return NULL;
-    }
-    return m_pScanlineBuf;
-}
-FX_DWORD CCodec_JpegDecoder::GetSrcOffset()
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->GetSrcOffset(m_pExtContext);
-    }
-    return (FX_DWORD)(m_SrcSize - src.bytes_in_buffer);
-}
-ICodec_ScanlineDecoder* CCodec_JpegModule::CreateDecoder(const uint8_t* src_buf, FX_DWORD src_size,
-        int width, int height, int nComps, FX_BOOL ColorTransform)
-{
-    if (src_buf == NULL || src_size == 0) {
-        return NULL;
-    }
-    CCodec_JpegDecoder* pDecoder = new CCodec_JpegDecoder;
-    if (!pDecoder->Create(src_buf, src_size, width, height, nComps, ColorTransform, m_pExtProvider)) {
-        delete pDecoder;
-        return NULL;
-    }
-    return pDecoder;
-}
-FX_BOOL CCodec_JpegModule::LoadInfo(const uint8_t* src_buf, FX_DWORD src_size, int& width, int& height,
-                                    int& num_components, int& bits_per_components, FX_BOOL& color_transform,
-                                    uint8_t** icc_buf_ptr, FX_DWORD* icc_length)
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->LoadInfo(src_buf, src_size, width, height,
-                                        num_components, bits_per_components, color_transform,
-                                        icc_buf_ptr, icc_length);
-    }
-    return _JpegLoadInfo(src_buf, src_size, width, height, num_components, bits_per_components, color_transform, icc_buf_ptr, icc_length);
-}
-FX_BOOL CCodec_JpegModule::Encode(const CFX_DIBSource* pSource, uint8_t*& dest_buf, FX_STRSIZE& dest_size, int quality, const uint8_t* icc_buf, FX_DWORD icc_length)
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->Encode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length);
-    }
-    if(pSource->GetBPP() < 8 || pSource->GetPalette() != NULL) {
-        ASSERT(pSource->GetBPP() >= 8 && pSource->GetPalette() == NULL);
-        return FALSE;
-    }
-    _JpegEncode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length);
-    return TRUE;
-}
-struct FXJPEG_Context {
-    jmp_buf                     m_JumpMark;
-    jpeg_decompress_struct m_Info;
-    jpeg_error_mgr      m_ErrMgr;
-    jpeg_source_mgr     m_SrcMgr;
-    unsigned int        m_SkipSize;
-    void*               (*m_AllocFunc)(unsigned int);
-    void                (*m_FreeFunc)(void*);
-};
-extern "C" {
-    static void _error_fatal1(j_common_ptr cinfo)
-    {
-        longjmp(((FXJPEG_Context*)cinfo->client_data)->m_JumpMark, -1);
-    }
-};
-extern "C" {
-    static void _src_skip_data1(struct jpeg_decompress_struct* cinfo, long num)
-    {
-        if (cinfo->src->bytes_in_buffer < (size_t)num) {
-            ((FXJPEG_Context*)cinfo->client_data)->m_SkipSize = (unsigned int)(num - cinfo->src->bytes_in_buffer);
-            cinfo->src->bytes_in_buffer = 0;
-        } else {
-            cinfo->src->next_input_byte += num;
-            cinfo->src->bytes_in_buffer -= num;
-        }
-    }
-};
-static void* jpeg_alloc_func(unsigned int size)
-{
-    return FX_Alloc(char, size);
-}
-static void jpeg_free_func(void* p)
-{
-    FX_Free(p);
-}
-void* CCodec_JpegModule::Start()
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->Start();
-    }
-    FXJPEG_Context* p = (FXJPEG_Context*)FX_Alloc(uint8_t, sizeof(FXJPEG_Context));
-    p->m_AllocFunc = jpeg_alloc_func;
-    p->m_FreeFunc = jpeg_free_func;
-    p->m_ErrMgr.error_exit = _error_fatal1;
-    p->m_ErrMgr.emit_message = _error_do_nothing1;
-    p->m_ErrMgr.output_message = _error_do_nothing;
-    p->m_ErrMgr.format_message = _error_do_nothing2;
-    p->m_ErrMgr.reset_error_mgr = _error_do_nothing;
-    p->m_SrcMgr.init_source = _src_do_nothing;
-    p->m_SrcMgr.term_source = _src_do_nothing;
-    p->m_SrcMgr.skip_input_data = _src_skip_data1;
-    p->m_SrcMgr.fill_input_buffer = _src_fill_buffer;
-    p->m_SrcMgr.resync_to_restart = _src_resync;
-    p->m_Info.client_data = p;
-    p->m_Info.err = &p->m_ErrMgr;
-    if (setjmp(p->m_JumpMark) == -1) {
-        return 0;
-    }
-    jpeg_create_decompress(&p->m_Info);
-    p->m_Info.src = &p->m_SrcMgr;
-    p->m_SkipSize = 0;
-    return p;
-}
-void CCodec_JpegModule::Finish(void* pContext)
-{
-    if (m_pExtProvider) {
-        m_pExtProvider->Finish(pContext);
-        return;
-    }
-    FXJPEG_Context* p = (FXJPEG_Context*)pContext;
-    jpeg_destroy_decompress(&p->m_Info);
-    p->m_FreeFunc(p);
-}
-void CCodec_JpegModule::Input(void* pContext, const unsigned char* src_buf, FX_DWORD src_size)
-{
-    if (m_pExtProvider) {
-        m_pExtProvider->Input(pContext, src_buf, src_size);
-        return;
-    }
-    FXJPEG_Context* p = (FXJPEG_Context*)pContext;
-    if (p->m_SkipSize) {
-        if (p->m_SkipSize > src_size) {
-            p->m_SrcMgr.bytes_in_buffer = 0;
-            p->m_SkipSize -= src_size;
-            return;
-        }
-        src_size -= p->m_SkipSize;
-        src_buf += p->m_SkipSize;
-        p->m_SkipSize = 0;
-    }
-    p->m_SrcMgr.next_input_byte = src_buf;
-    p->m_SrcMgr.bytes_in_buffer = src_size;
-}
-int CCodec_JpegModule::ReadHeader(void* pContext, int* width, int* height, int* nComps)
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->ReadHeader(pContext, width, height, nComps);
-    }
-    FXJPEG_Context* p = (FXJPEG_Context*)pContext;
-    if (setjmp(p->m_JumpMark) == -1) {
-        return 1;
-    }
-    int ret = jpeg_read_header(&p->m_Info, true);
-    if (ret == JPEG_SUSPENDED) {
-        return 2;
-    }
-    if (ret != JPEG_HEADER_OK) {
-        return 1;
-    }
-    *width = p->m_Info.image_width;
-    *height = p->m_Info.image_height;
-    *nComps = p->m_Info.num_components;
-    return 0;
-}
-int CCodec_JpegModule::StartScanline(void* pContext, int down_scale)
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->StartScanline(pContext, down_scale);
-    }
-    FXJPEG_Context* p = (FXJPEG_Context*)pContext;
-    if (setjmp(p->m_JumpMark) == -1) {
-        return 0;
-    }
-    p->m_Info.scale_denom = down_scale;
-    return jpeg_start_decompress(&p->m_Info);
-}
-FX_BOOL CCodec_JpegModule::ReadScanline(void* pContext, unsigned char* dest_buf)
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->ReadScanline(pContext, dest_buf);
-    }
-    FXJPEG_Context* p = (FXJPEG_Context*)pContext;
-    if (setjmp(p->m_JumpMark) == -1) {
-        return FALSE;
-    }
-    int nlines = jpeg_read_scanlines(&p->m_Info, &dest_buf, 1);
-    return nlines == 1;
-}
-FX_DWORD CCodec_JpegModule::GetAvailInput(void* pContext, uint8_t** avail_buf_ptr)
-{
-    if (m_pExtProvider) {
-        return m_pExtProvider->GetAvailInput(pContext, avail_buf_ptr);
-    }
-    if(avail_buf_ptr != NULL) {
-        *avail_buf_ptr = NULL;
-        if(((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) {
-            *avail_buf_ptr = (uint8_t*)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte;
-        }
-    }
-    return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer;
-}
+  }
+  return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer;
+}