Splitting fx_ge_fontmap.cpp

core/fxge/ge/cfx_fontmgr.cpp

+// Copyright 2016 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/fxge/include/fx_font.h"
+
+#include "core/fxge/fontdata/chromefontdata/chromefontdata.h"
+
+namespace {
+
+struct BuiltinFont {
+  const uint8_t* m_pFontData;
+  uint32_t m_dwSize;
+};
+
+const BuiltinFont g_FoxitFonts[14] = {
+    {g_FoxitFixedFontData, 17597},
+    {g_FoxitFixedBoldFontData, 18055},
+    {g_FoxitFixedBoldItalicFontData, 19151},
+    {g_FoxitFixedItalicFontData, 18746},
+    {g_FoxitSansFontData, 15025},
+    {g_FoxitSansBoldFontData, 16344},
+    {g_FoxitSansBoldItalicFontData, 16418},
+    {g_FoxitSansItalicFontData, 16339},
+    {g_FoxitSerifFontData, 19469},
+    {g_FoxitSerifBoldFontData, 19395},
+    {g_FoxitSerifBoldItalicFontData, 20733},
+    {g_FoxitSerifItalicFontData, 21227},
+    {g_FoxitSymbolFontData, 16729},
+    {g_FoxitDingbatsFontData, 29513},
+};
+
+const BuiltinFont g_MMFonts[2] = {
+    {g_FoxitSerifMMFontData, 113417},
+    {g_FoxitSansMMFontData, 66919},
+};
+
+CFX_ByteString KeyNameFromFace(const CFX_ByteString& face_name,
+                               int weight,
+                               FX_BOOL bItalic) {
+  CFX_ByteString key(face_name);
+  key += ',';
+  key += CFX_ByteString::FormatInteger(weight);
+  key += bItalic ? 'I' : 'N';
+  return key;
+}
+
+CFX_ByteString KeyNameFromSize(int ttc_size, uint32_t checksum) {
+  CFX_ByteString key;
+  key.Format("%d:%d", ttc_size, checksum);
+  return key;
+}
+
+int GetTTCIndex(const uint8_t* pFontData,
+                uint32_t ttc_size,
+                uint32_t font_offset) {
+  int face_index = 0;
+  const uint8_t* p = pFontData + 8;
+  uint32_t nfont = GET_TT_LONG(p);
+  uint32_t index;
+  for (index = 0; index < nfont; index++) {
+    p = pFontData + 12 + index * 4;
+    if (GET_TT_LONG(p) == font_offset) {
+      break;
+    }
+  }
+  if (index >= nfont) {
+    face_index = 0;
+  } else {
+    face_index = index;
+  }
+  return face_index;
+}
+
+}  // namespace
+
+CFX_FontMgr::CFX_FontMgr()
+    : m_FTLibrary(nullptr), m_FTLibrarySupportsHinting(false) {
+  m_pBuiltinMapper.reset(new CFX_FontMapper(this));
+}
+
+CFX_FontMgr::~CFX_FontMgr() {
+  for (const auto& pair : m_FaceMap)
+    delete pair.second;
+
+  // |m_pBuiltinMapper| references |m_FTLibrary|, so it has to be destroyed
+  // first.
+  m_pBuiltinMapper.reset();
+  FXFT_Done_FreeType(m_FTLibrary);
+}
+
+void CFX_FontMgr::InitFTLibrary() {
+  if (m_FTLibrary)
+    return;
+  FXFT_Init_FreeType(&m_FTLibrary);
+  m_FTLibrarySupportsHinting =
+      FXFT_Library_SetLcdFilter(m_FTLibrary, FT_LCD_FILTER_DEFAULT) !=
+      FT_Err_Unimplemented_Feature;
+}
+
+void CFX_FontMgr::SetSystemFontInfo(
+    std::unique_ptr<IFX_SystemFontInfo> pFontInfo) {
+  m_pBuiltinMapper->SetSystemFontInfo(std::move(pFontInfo));
+}
+
+FXFT_Face CFX_FontMgr::FindSubstFont(const CFX_ByteString& face_name,
+                                     FX_BOOL bTrueType,
+                                     uint32_t flags,
+                                     int weight,
+                                     int italic_angle,
+                                     int CharsetCP,
+                                     CFX_SubstFont* pSubstFont) {
+  InitFTLibrary();
+  return m_pBuiltinMapper->FindSubstFont(face_name, bTrueType, flags, weight,
+                                         italic_angle, CharsetCP, pSubstFont);
+}
+
+FXFT_Face CFX_FontMgr::GetCachedFace(const CFX_ByteString& face_name,
+                                     int weight,
+                                     FX_BOOL bItalic,
+                                     uint8_t*& pFontData) {
+  auto it = m_FaceMap.find(KeyNameFromFace(face_name, weight, bItalic));
+  if (it == m_FaceMap.end())
+    return nullptr;
+
+  CTTFontDesc* pFontDesc = it->second;
+  pFontData = pFontDesc->m_pFontData;
+  pFontDesc->m_RefCount++;
+  return pFontDesc->m_SingleFace.m_pFace;
+}
+FXFT_Face CFX_FontMgr::AddCachedFace(const CFX_ByteString& face_name,
+                                     int weight,
+                                     FX_BOOL bItalic,
+                                     uint8_t* pData,
+                                     uint32_t size,
+                                     int face_index) {
+  CTTFontDesc* pFontDesc = new CTTFontDesc;
+  pFontDesc->m_Type = 1;
+  pFontDesc->m_SingleFace.m_pFace = nullptr;
+  pFontDesc->m_SingleFace.m_bBold = weight;
+  pFontDesc->m_SingleFace.m_bItalic = bItalic;
+  pFontDesc->m_pFontData = pData;
+  pFontDesc->m_RefCount = 1;
+
+  InitFTLibrary();
+  FXFT_Library library = m_FTLibrary;
+  int ret = FXFT_New_Memory_Face(library, pData, size, face_index,
+                                 &pFontDesc->m_SingleFace.m_pFace);
+  if (ret) {
+    delete pFontDesc;
+    return nullptr;
+  }
+  ret = FXFT_Set_Pixel_Sizes(pFontDesc->m_SingleFace.m_pFace, 64, 64);
+  if (ret) {
+    delete pFontDesc;
+    return nullptr;
+  }
+  m_FaceMap[KeyNameFromFace(face_name, weight, bItalic)] = pFontDesc;
+  return pFontDesc->m_SingleFace.m_pFace;
+}
+
+FXFT_Face CFX_FontMgr::GetCachedTTCFace(int ttc_size,
+                                        uint32_t checksum,
+                                        int font_offset,
+                                        uint8_t*& pFontData) {
+  auto it = m_FaceMap.find(KeyNameFromSize(ttc_size, checksum));
+  if (it == m_FaceMap.end())
+    return nullptr;
+
+  CTTFontDesc* pFontDesc = it->second;
+  pFontData = pFontDesc->m_pFontData;
+  pFontDesc->m_RefCount++;
+  int face_index = GetTTCIndex(pFontDesc->m_pFontData, ttc_size, font_offset);
+  if (!pFontDesc->m_TTCFace.m_pFaces[face_index]) {
+    pFontDesc->m_TTCFace.m_pFaces[face_index] =
+        GetFixedFace(pFontDesc->m_pFontData, ttc_size, face_index);
+  }
+  return pFontDesc->m_TTCFace.m_pFaces[face_index];
+}
+FXFT_Face CFX_FontMgr::AddCachedTTCFace(int ttc_size,
+                                        uint32_t checksum,
+                                        uint8_t* pData,
+                                        uint32_t size,
+                                        int font_offset) {
+  CTTFontDesc* pFontDesc = new CTTFontDesc;
+  pFontDesc->m_Type = 2;
+  pFontDesc->m_pFontData = pData;
+  for (int i = 0; i < 16; i++) {
+    pFontDesc->m_TTCFace.m_pFaces[i] = nullptr;
+  }
+  pFontDesc->m_RefCount++;
+  m_FaceMap[KeyNameFromSize(ttc_size, checksum)] = pFontDesc;
+  int face_index = GetTTCIndex(pFontDesc->m_pFontData, ttc_size, font_offset);
+  pFontDesc->m_TTCFace.m_pFaces[face_index] =
+      GetFixedFace(pFontDesc->m_pFontData, ttc_size, face_index);
+  return pFontDesc->m_TTCFace.m_pFaces[face_index];
+}
+
+FXFT_Face CFX_FontMgr::GetFixedFace(const uint8_t* pData,
+                                    uint32_t size,
+                                    int face_index) {
+  InitFTLibrary();
+  FXFT_Library library = m_FTLibrary;
+  FXFT_Face face = nullptr;
+  if (FXFT_New_Memory_Face(library, pData, size, face_index, &face))
+    return nullptr;
+  return FXFT_Set_Pixel_Sizes(face, 64, 64) ? nullptr : face;
+}
+
+FXFT_Face CFX_FontMgr::GetFileFace(const FX_CHAR* filename, int face_index) {
+  InitFTLibrary();
+  FXFT_Library library = m_FTLibrary;
+  FXFT_Face face = nullptr;
+  if (FXFT_New_Face(library, filename, face_index, &face))
+    return nullptr;
+  return FXFT_Set_Pixel_Sizes(face, 64, 64) ? nullptr : face;
+}
+
+void CFX_FontMgr::ReleaseFace(FXFT_Face face) {
+  if (!face) {
+    return;
+  }
+  FX_BOOL bNeedFaceDone = TRUE;
+  auto it = m_FaceMap.begin();
+  while (it != m_FaceMap.end()) {
+    auto temp = it++;
+    int nRet = temp->second->ReleaseFace(face);
+    if (nRet == -1)
+      continue;
+    bNeedFaceDone = FALSE;
+    if (nRet == 0)
+      m_FaceMap.erase(temp);
+    break;
+  }
+  if (bNeedFaceDone && !m_pBuiltinMapper->IsBuiltinFace(face))
+    FXFT_Done_Face(face);
+}
+
+bool CFX_FontMgr::GetBuiltinFont(size_t index,
+                                 const uint8_t** pFontData,
+                                 uint32_t* size) {
+  if (index < FX_ArraySize(g_FoxitFonts)) {
+    *pFontData = g_FoxitFonts[index].m_pFontData;
+    *size = g_FoxitFonts[index].m_dwSize;
+    return true;
+  }
+  index -= FX_ArraySize(g_FoxitFonts);
+  if (index < FX_ArraySize(g_MMFonts)) {
+    *pFontData = g_MMFonts[index].m_pFontData;
+    *size = g_MMFonts[index].m_dwSize;
+    return true;
+  }
+  return false;
+}