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 1bee5e774aeb7d31653b2a6e6d0245487335a57d..b5eb4b2692e3865101c3edb3cd4abff2818c1f4a 100644
--- a/core/src/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpeg.cpp
@@ -230,6 +230,19 @@ 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,
@@ -619,7 +632,12 @@ 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
   FXJPEG_Context* p = (FXJPEG_Context*)pContext;
   if (setjmp(p->m_JumpMark) == -1) {
     return 1;
@@ -634,6 +652,9 @@ 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) {