gfx/2d/NativeFontResourceFreeType.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "NativeFontResourceFreeType.h"
   8 #include "UnscaledFontFreeType.h"
   9
  10 namespace mozilla::gfx {
  11
  12 NativeFontResourceFreeType::NativeFontResourceFreeType(
  13     UniquePtr<uint8_t[]>&& aFontData, uint32_t aDataLength,
  14     FT_Library aFTLibrary)
  15     : NativeFontResource(aDataLength),
  16       mFontData(std::move(aFontData)),
  17       mDataLength(aDataLength),
  18       mFTLibrary(aFTLibrary) {}
  19
  20 NativeFontResourceFreeType::~NativeFontResourceFreeType() = default;
  21
  22 template <class T>
  23 already_AddRefed<T> NativeFontResourceFreeType::CreateInternal(
  24     uint8_t* aFontData, uint32_t aDataLength, FT_Library aFTLibrary) {
  25   if (!aFontData || !aDataLength) {
  26     return nullptr;
  27   }
  28   UniquePtr<uint8_t[]> fontData(new (fallible) uint8_t[aDataLength]);
  29   if (!fontData) {
  30     return nullptr;
  31   }
  32   memcpy(fontData.get(), aFontData, aDataLength);
  33
  34   RefPtr<T> resource = new T(std::move(fontData), aDataLength, aFTLibrary);
  35   return resource.forget();
  36 }
  37
  38 #ifdef MOZ_WIDGET_ANDROID
  39 already_AddRefed<NativeFontResourceFreeType> NativeFontResourceFreeType::Create(
  40     uint8_t* aFontData, uint32_t aDataLength, FT_Library aFTLibrary) {
  41   return CreateInternal<NativeFontResourceFreeType>(aFontData, aDataLength,
  42                                                     aFTLibrary);
  43 }
  44
  45 already_AddRefed<UnscaledFont> NativeFontResourceFreeType::CreateUnscaledFont(
  46     uint32_t aIndex, const uint8_t* aInstanceData,
  47     uint32_t aInstanceDataLength) {
  48   if (RefPtr<SharedFTFace> face = CloneFace()) {
  49     return MakeAndAddRef<UnscaledFontFreeType>(std::move(face));
  50   }
  51   return nullptr;
  52 }
  53 #endif
  54
  55 already_AddRefed<SharedFTFace> NativeFontResourceFreeType::CloneFace(
  56     int aFaceIndex) {
  57   RefPtr<SharedFTFace> face = Factory::NewSharedFTFaceFromData(
  58       mFTLibrary, mFontData.get(), mDataLength, aFaceIndex, this);
  59   if (!face ||
  60       (FT_Select_Charmap(face->GetFace(), FT_ENCODING_UNICODE) != FT_Err_Ok &&
  61        FT_Select_Charmap(face->GetFace(), FT_ENCODING_MS_SYMBOL) !=
  62            FT_Err_Ok)) {
  63     return nullptr;
  64   }
  65   return face.forget();
  66 }
  67
  68 #ifdef MOZ_WIDGET_GTK
  69 NativeFontResourceFontconfig::NativeFontResourceFontconfig(
  70     UniquePtr<uint8_t[]>&& aFontData, uint32_t aDataLength,
  71     FT_Library aFTLibrary)
  72     : NativeFontResourceFreeType(std::move(aFontData), aDataLength,
  73                                  aFTLibrary) {}
  74
  75 already_AddRefed<UnscaledFont> NativeFontResourceFontconfig::CreateUnscaledFont(
  76     uint32_t aIndex, const uint8_t* aInstanceData,
  77     uint32_t aInstanceDataLength) {
  78   if (RefPtr<SharedFTFace> face = CloneFace()) {
  79     return MakeAndAddRef<UnscaledFontFontconfig>(std::move(face));
  80   }
  81   return nullptr;
  82 }
  83
  84 already_AddRefed<NativeFontResourceFontconfig>
  85 NativeFontResourceFontconfig::Create(uint8_t* aFontData, uint32_t aDataLength,
  86                                      FT_Library aFTLibrary) {
  87   return CreateInternal<NativeFontResourceFontconfig>(aFontData, aDataLength,
  88                                                       aFTLibrary);
  89 }
  90 #endif
  91
  92 }  // namespace mozilla::gfx