gecko-dev/gfx/2d/UnscaledFontFreeType.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_GFX_UNSCALEDFONTFREETYPE_H_
#define MOZILLA_GFX_UNSCALEDFONTFREETYPE_H_

#include <cairo-ft.h>

#include "2D.h"

namespace mozilla {
namespace gfx {

class ScaledFontFreeType;
class ScaledFontFontconfig;

class UnscaledFontFreeType : public UnscaledFont
{
public:
  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(UnscaledFontFreeType, override)
  explicit UnscaledFontFreeType(FT_Face aFace,
                                bool aOwnsFace = false)
    : mFace(aFace)
    , mOwnsFace(aOwnsFace)
    , mIndex(0)
  {}
  explicit UnscaledFontFreeType(const char* aFile,
                                uint32_t aIndex = 0)
    : mFace(nullptr)
    , mOwnsFace(false)
    , mFile(aFile)
    , mIndex(aIndex)
  {}
  explicit UnscaledFontFreeType(std::string&& aFile,
                                uint32_t aIndex = 0)
    : mFace(nullptr)
    , mOwnsFace(false)
    , mFile(std::move(aFile))
    , mIndex(aIndex)
  {}
  UnscaledFontFreeType(FT_Face aFace,
                       NativeFontResource* aNativeFontResource)
    : mFace(aFace)
    , mOwnsFace(false)
    , mIndex(0)
    , mNativeFontResource(aNativeFontResource)
  {}
  ~UnscaledFontFreeType()
  {
    if (mOwnsFace) {
      Factory::ReleaseFTFace(mFace);
    }
  }

  FontType GetType() const override { return FontType::FREETYPE; }

  FT_Face GetFace() const { return mFace; }
  const char* GetFile() const { return mFile.c_str(); }
  uint32_t GetIndex() const { return mIndex; }
  const RefPtr<NativeFontResource>& GetNativeFontResource() const { return mNativeFontResource; }

  bool GetFontFileData(FontFileDataOutput aDataCallback, void* aBaton) override;

  bool GetFontDescriptor(FontDescriptorOutput aCb, void* aBaton) override;

  bool GetWRFontDescriptor(WRFontDescriptorOutput aCb, void* aBaton) override;

#ifdef MOZ_WIDGET_ANDROID
  already_AddRefed<ScaledFont>
    CreateScaledFont(Float aGlyphSize,
                     const uint8_t* aInstanceData,
                     uint32_t aInstanceDataLength,
                     const FontVariation* aVariations,
                     uint32_t aNumVariations) override;
#endif

protected:
  FT_Face mFace;
  bool mOwnsFace;
  std::string mFile;
  uint32_t mIndex;
  RefPtr<NativeFontResource> mNativeFontResource;

  friend class ScaledFontFreeType;
  friend class ScaledFontFontconfig;

  static void
    GetVariationSettingsFromFace(std::vector<FontVariation>* aVariations,
                                 FT_Face aFace);

  static void
    ApplyVariationsToFace(const FontVariation* aVariations,
                          uint32_t aNumVariations,
                          FT_Face aFace);
};

#ifdef MOZ_WIDGET_GTK
class UnscaledFontFontconfig : public UnscaledFontFreeType
{
public:
  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(UnscaledFontFontconfig, override)
  explicit UnscaledFontFontconfig(FT_Face aFace,
                                  bool aOwnsFace = false)
    : UnscaledFontFreeType(aFace, aOwnsFace)
  {}
  explicit UnscaledFontFontconfig(const char* aFile,
                                  uint32_t aIndex = 0)
    : UnscaledFontFreeType(aFile, aIndex)
  {}
  explicit UnscaledFontFontconfig(std::string&& aFile,
                                  uint32_t aIndex = 0)
    : UnscaledFontFreeType(std::move(aFile), aIndex)
  {}
  UnscaledFontFontconfig(FT_Face aFace,
                         NativeFontResource* aNativeFontResource)
    : UnscaledFontFreeType(aFace, aNativeFontResource)
  {}

  FontType GetType() const override { return FontType::FONTCONFIG; }

  static already_AddRefed<UnscaledFont>
    CreateFromFontDescriptor(const uint8_t* aData, uint32_t aDataLength, uint32_t aIndex);

  already_AddRefed<ScaledFont>
    CreateScaledFont(Float aGlyphSize,
                     const uint8_t* aInstanceData,
                     uint32_t aInstanceDataLength,
                     const FontVariation* aVariations,
                     uint32_t aNumVariations) override;

  already_AddRefed<ScaledFont>
    CreateScaledFontFromWRFont(Float aGlyphSize,
                               const wr::FontInstanceOptions* aOptions,
                               const wr::FontInstancePlatformOptions* aPlatformOptions,
                               const FontVariation* aVariations,
                               uint32_t aNumVariations) override;
};
#endif

} // namespace gfx
} // namespace mozilla

#endif /* MOZILLA_GFX_UNSCALEDFONTFREETYPE_H_ */