core/ difference with XFA (for information only).

core/src/fxge/ge/fx_ge_fontmap.cpp

Index: core/src/fxge/ge/fx_ge_fontmap.cpp
diff --git a/core/src/fxge/ge/fx_ge_fontmap.cpp b/core/src/fxge/ge/fx_ge_fontmap.cpp
index 52605a003cf02066299d5d3031c2df05c901258b..6b0d7bf7e80094935f9d0399b0c3fc2578136ad4 100644
--- a/core/src/fxge/ge/fx_ge_fontmap.cpp
+++ b/core/src/fxge/ge/fx_ge_fontmap.cpp
@@ -1083,6 +1083,11 @@ FXFT_Face CFX_FontMapper::FindSubstFont(const CFX_ByteString& name,
     pSubstFont->m_SubstFlags |= FXFONT_SUBST_EXACT;
   }
   if (hFont == NULL) {
+#ifdef PDF_ENABLE_XFA
+    if (flags & FXFONT_EXACTMATCH) {
+      return NULL;
+    }
+#endif
     if (bCJK) {
       if (italic_angle != 0) {
         bItalic = TRUE;
@@ -1208,6 +1213,90 @@ FXFT_Face CFX_FontMapper::FindSubstFont(const CFX_ByteString& name,
   m_pFontInfo->DeleteFont(hFont);
   return face;
 }
+#ifdef PDF_ENABLE_XFA
+FXFT_Face CFX_FontMapper::FindSubstFontByUnicode(FX_DWORD dwUnicode,
+                                                 FX_DWORD flags,
+                                                 int weight,
+                                                 int italic_angle) {
+  if (m_pFontInfo == NULL) {
+    return NULL;
+  }
+  FX_BOOL bItalic = (flags & FXFONT_ITALIC) != 0;
+  int PitchFamily = 0;
+  if (flags & FXFONT_SERIF) {
+    PitchFamily |= FXFONT_FF_ROMAN;
+  }
+  if (flags & FXFONT_SCRIPT) {
+    PitchFamily |= FXFONT_FF_SCRIPT;
+  }
+  if (flags & FXFONT_FIXED_PITCH) {
+    PitchFamily |= FXFONT_FF_FIXEDPITCH;
+  }
+  void* hFont =
+      m_pFontInfo->MapFontByUnicode(dwUnicode, weight, bItalic, PitchFamily);
+  if (hFont == NULL) {
+    return NULL;
+  }
+  FX_DWORD ttc_size = m_pFontInfo->GetFontData(hFont, 0x74746366, NULL, 0);
+  FX_DWORD font_size = m_pFontInfo->GetFontData(hFont, 0, NULL, 0);
+  if (font_size == 0 && ttc_size == 0) {
+    m_pFontInfo->DeleteFont(hFont);
+    return NULL;
+  }
+  FXFT_Face face = NULL;
+  if (ttc_size) {
+    uint8_t temp[1024];
+    m_pFontInfo->GetFontData(hFont, 0x74746366, temp, 1024);
+    FX_DWORD checksum = 0;
+    for (int i = 0; i < 256; i++) {
+      checksum += ((FX_DWORD*)temp)[i];
+    }
+    uint8_t* pFontData;
+    face = m_pFontMgr->GetCachedTTCFace(ttc_size, checksum,
+                                        ttc_size - font_size, pFontData);
+    if (face == NULL) {
+      pFontData = FX_Alloc(uint8_t, ttc_size);
+      if (pFontData) {
+        m_pFontInfo->GetFontData(hFont, 0x74746366, pFontData, ttc_size);
+        face = m_pFontMgr->AddCachedTTCFace(ttc_size, checksum, pFontData,
+                                            ttc_size, ttc_size - font_size);
+      }
+    }
+  } else {
+    CFX_ByteString SubstName;
+    m_pFontInfo->GetFaceName(hFont, SubstName);
+    uint8_t* pFontData;
+    face = m_pFontMgr->GetCachedFace(SubstName, weight, bItalic, pFontData);
+    if (face == NULL) {
+      pFontData = FX_Alloc(uint8_t, font_size);
+      if (!pFontData) {
+        m_pFontInfo->DeleteFont(hFont);
+        return NULL;
+      }
+      m_pFontInfo->GetFontData(hFont, 0, pFontData, font_size);
+      face = m_pFontMgr->AddCachedFace(SubstName, weight, bItalic, pFontData,
+                                       font_size,
+                                       m_pFontInfo->GetFaceIndex(hFont));
+    }
+  }
+  m_pFontInfo->DeleteFont(hFont);
+  return face;
+}
+
+FX_BOOL CFX_FontMapper::IsBuiltinFace(const FXFT_Face face) const {
+  for (int i = 0; i < MM_FACE_COUNT; ++i) {
+    if (m_MMFaces[i] == face) {
+      return TRUE;
+    }
+  }
+  for (int i = 0; i < FOXIT_FACE_COUNT; ++i) {
+    if (m_FoxitFaces[i] == face) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+#endif
 extern "C" {
 unsigned long _FTStreamRead(FXFT_Stream stream,
                             unsigned long offset,
@@ -1429,6 +1518,14 @@ void* CFX_FolderFontInfo::MapFont(int weight,
                                   int& iExact) {
   return NULL;
 }
+#ifdef PDF_ENABLE_XFA
+void* CFX_FolderFontInfo::MapFontByUnicode(FX_DWORD dwUnicode,
+                                           int weight,
+                                           FX_BOOL bItalic,
+                                           int pitch_family) {
+  return NULL;
+}
+#endif
 void* CFX_FolderFontInfo::GetFont(const FX_CHAR* face) {
   auto it = m_FontList.find(face);
   return it != m_FontList.end() ? it->second : nullptr;