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NativeFontResourceDWrite.h (2021B)

      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 #ifndef mozilla_gfx_NativeFontResourceDWrite_h
      8 #define mozilla_gfx_NativeFontResourceDWrite_h
      9 
     10 #include <dwrite.h>
     11 
     12 #include "2D.h"
     13 #include "mozilla/AlreadyAddRefed.h"
     14 
     15 namespace mozilla {
     16 namespace gfx {
     17 
     18 class NativeFontResourceDWrite final : public NativeFontResource {
     19 public:
     20  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(NativeFontResourceDWrite, override)
     21 
     22  /**
     23   * Creates a NativeFontResourceDWrite if data is valid. Note aFontData will be
     24   * copied if required and so can be released after calling.
     25   *
     26   * @param aFontData the SFNT data.
     27   * @param aDataLength length of data.
     28   * @return Referenced NativeFontResourceDWrite or nullptr if invalid.
     29   */
     30  static already_AddRefed<NativeFontResourceDWrite> Create(
     31      const uint8_t* aFontData, uint32_t aDataLength);
     32 
     33  already_AddRefed<UnscaledFont> CreateUnscaledFont(
     34      uint32_t aIndex, const uint8_t* aInstanceData,
     35      uint32_t aInstanceDataLength) final;
     36 
     37 private:
     38  NativeFontResourceDWrite(
     39      IDWriteFactory* aFactory, already_AddRefed<IDWriteFontFile> aFontFile,
     40      already_AddRefed<IDWriteFontFileStream> aFontFileStream,
     41      DWRITE_FONT_FACE_TYPE aFaceType, uint32_t aNumberOfFaces,
     42      size_t aDataLength)
     43      : NativeFontResource(aDataLength),
     44        mFactory(aFactory),
     45        mFontFile(aFontFile),
     46        mFontFileStream(aFontFileStream),
     47        mFaceType(aFaceType),
     48        mNumberOfFaces(aNumberOfFaces) {}
     49 
     50  IDWriteFactory* mFactory;
     51  RefPtr<IDWriteFontFile> mFontFile;
     52  RefPtr<IDWriteFontFileStream> mFontFileStream;
     53  DWRITE_FONT_FACE_TYPE mFaceType;
     54  uint32_t mNumberOfFaces;
     55 };
     56 
     57 }  // namespace gfx
     58 }  // namespace mozilla
     59 
     60 #endif  // mozilla_gfx_NativeFontResourceDWrite_h