Support the device font cache

core/fxge/ge/fx_ge_text.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 "core/fxge/ge/fx_text_int.h"
 #include "core/include/fxcodec/fx_codec.h"
 #include "core/include/fxge/fx_freetype.h"
 #include "core/include/fxge/fx_ge.h"
 
+#ifdef _SKIA_SUPPORT_
+#include "third_party/skia/include/core/SkStream.h"
+#include "third_party/skia/include/core/SkTypeface.h"
+#endif
+
 #undef FX_GAMMA
 #undef FX_GAMMA_INVERSE
 #define FX_GAMMA(value) (value)
 #define FX_GAMMA_INVERSE(value) (value)
 
 namespace {
 
 void ResetTransform(FT_Face face) {
   FXFT_Matrix matrix;
   matrix.xx = 0x10000L;
@@ skipping 1169 matching lines @@
   }
 
   CFX_FaceCache* face_cache = new CFX_FaceCache(bExternal ? nullptr : face);
   CFX_CountedFaceCache* counted_face_cache = new CFX_CountedFaceCache;
   counted_face_cache->m_nCount = 2;
   counted_face_cache->m_Obj = face_cache;
   map[face] = counted_face_cache;
   return face_cache;
 }
 
+#ifdef _SKIA_SUPPORT_
+CFX_TypeFace* CFX_FontCache::GetDeviceCache(CFX_Font* pFont) {
+  return GetCachedFace(pFont)->GetDeviceCache(pFont);
+}
+
+CFX_TypeFace* CFX_FaceCache::GetDeviceCache(CFX_Font* pFont) {
+  if (!m_pTypeface) {
+    m_pTypeface = SkTypeface::CreateFromStream(
+        new SkMemoryStream(pFont->GetFontData(), pFont->GetSize()));
+  }
+  return m_pTypeface;
+}
+#endif
+
 void CFX_FontCache::ReleaseCachedFace(CFX_Font* pFont) {
   FXFT_Face internal_face = pFont->GetFace();
   const bool bExternal = !internal_face;
   FXFT_Face face =
       bExternal ? (FXFT_Face)pFont->GetSubstFont()->m_ExtHandle : internal_face;
   CFX_FTCacheMap& map = bExternal ? m_ExtFaceMap : m_FTFaceMap;
 
   auto it = map.find(face);
   if (it == map.end())
     return;
@@ skipping 19 matching lines @@
     auto curr_it = it++;
     CFX_CountedFaceCache* cache = curr_it->second;
     if (bRelease || cache->m_nCount < 2) {
       delete cache->m_Obj;
       delete cache;
       m_ExtFaceMap.erase(curr_it);
     }
   }
 }
 
-CFX_FaceCache::CFX_FaceCache(FXFT_Face face) : m_Face(face) {}
+CFX_FaceCache::CFX_FaceCache(FXFT_Face face)
+    : m_Face(face)
+#ifdef _SKIA_SUPPORT_
+      ,
+      m_pTypeface(nullptr)
+#endif
+{
+}
 
 CFX_FaceCache::~CFX_FaceCache() {
   for (const auto& pair : m_SizeMap) {
     delete pair.second;
   }
   m_SizeMap.clear();
   for (const auto& pair : m_PathMap) {
     delete pair.second;
   }
   m_PathMap.clear();
+#ifdef _SKIA_SUPPORT_
+  SkSafeUnref(m_pTypeface);
+#endif
 }
+
 #if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_
 void CFX_FaceCache::InitPlatform() {}
 #endif
 CFX_GlyphBitmap* CFX_FaceCache::LookUpGlyphBitmap(
     CFX_Font* pFont,
     const CFX_Matrix* pMatrix,
     CFX_ByteStringC& FaceGlyphsKey,
     uint32_t glyph_index,
     FX_BOOL bFontStyle,
     int dest_width,
@@ skipping 604 matching lines @@
 void _CFX_UniqueKeyGen::Generate(int count, ...) {
   va_list argList;
   va_start(argList, count);
   for (int i = 0; i < count; i++) {
     int p = va_arg(argList, int);
     ((uint32_t*)m_Key)[i] = p;
   }
   va_end(argList);
   m_KeyLen = count * sizeof(uint32_t);
 }