core/ difference with XFA (for information only).

core/src/fxcodec/codec/fx_codec_jpeg.cpp

Index: core/src/fxcodec/codec/fx_codec_jpeg.cpp
diff --git a/core/src/fxcodec/codec/fx_codec_jpeg.cpp b/core/src/fxcodec/codec/fx_codec_jpeg.cpp
index 4fdbb8ed293b8f29d10db1035d98ee42b651e01a..66e762eaa1c152b650593d315cc977a5d591aef5 100644
--- a/core/src/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpeg.cpp
@@ -224,6 +224,19 @@ static void _JpegEncode(const CFX_DIBSource* pSource,
   FX_Free(line_buf);
   dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer;
 }
+#ifdef PDF_ENABLE_XFA
+static void _JpegLoadAttribute(struct jpeg_decompress_struct* pInfo,
+                               CFX_DIBAttribute* pAttribute) {
+  if (pInfo == NULL || pAttribute == NULL) {
+    return;
+  }
+  if (pAttribute) {
+    pAttribute->m_nXDPI = pInfo->X_density;
+    pAttribute->m_nYDPI = pInfo->Y_density;
+    pAttribute->m_wDPIUnit = pInfo->density_unit;
+  }
+}
+#endif
 static FX_BOOL _JpegLoadInfo(const uint8_t* src_buf,
                              FX_DWORD src_size,
                              int& width,
@@ -657,9 +670,19 @@ void CCodec_JpegModule::Input(void* pContext,
 int CCodec_JpegModule::ReadHeader(void* pContext,
                                   int* width,
                                   int* height,
+#ifndef PDF_ENABLE_XFA
                                   int* nComps) {
+#else
+                                  int* nComps,
+                                  CFX_DIBAttribute* pAttribute) {
+#endif
   if (m_pExtProvider) {
+#ifndef PDF_ENABLE_XFA
     return m_pExtProvider->ReadHeader(pContext, width, height, nComps);
+#else
+    return m_pExtProvider->ReadHeader(pContext, width, height, nComps,
+                                      pAttribute);
+#endif
   }
   FXJPEG_Context* p = (FXJPEG_Context*)pContext;
   if (setjmp(p->m_JumpMark) == -1) {
@@ -675,6 +698,9 @@ int CCodec_JpegModule::ReadHeader(void* pContext,
   *width = p->m_Info.image_width;
   *height = p->m_Info.image_height;
   *nComps = p->m_Info.num_components;
+#ifdef PDF_ENABLE_XFA
+  _JpegLoadAttribute(&p->m_Info, pAttribute);
+#endif
   return 0;
 }
 int CCodec_JpegModule::StartScanline(void* pContext, int down_scale) {