gfx/2d/NativeFontResourceFontconfig.cpp
author Lee Salzman <lsalzman@mozilla.com>
Fri, 01 Jun 2018 13:08:57 -0400
changeset 420926 1003bb0905c53eb6a46f6c8cea029afd9d76a078
parent 420862 b54db66223586b4e04f5cb926fccdacf8a176b91
permissions -rw-r--r--
Bug 1464094 - print font variations as paths for PDF/PS output. r=jfkthame MozReview-Commit-ID: 3sPKD4pNwdy

/* -*- 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/. */

#include "NativeFontResourceFontconfig.h"
#include "ScaledFontFontconfig.h"
#include "UnscaledFontFreeType.h"
#include "Logging.h"

namespace mozilla {
namespace gfx {

NativeFontResourceFontconfig::NativeFontResourceFontconfig(UniquePtr<uint8_t[]>&& aFontData,
                                                           uint32_t aDataLength,
                                                           FT_Face aFace)
  : mFontData(std::move(aFontData))
  , mDataLength(aDataLength)
  , mFace(aFace)
{
}

NativeFontResourceFontconfig::~NativeFontResourceFontconfig()
{
  if (mFace) {
    Factory::ReleaseFTFace(mFace);
    mFace = nullptr;
  }
}

already_AddRefed<NativeFontResourceFontconfig>
NativeFontResourceFontconfig::Create(uint8_t *aFontData, uint32_t aDataLength, FT_Library aFTLibrary)
{
  if (!aFontData || !aDataLength) {
    return nullptr;
  }
  UniquePtr<uint8_t[]> fontData(new (fallible) uint8_t[aDataLength]);
  if (!fontData) {
    return nullptr;
  }
  memcpy(fontData.get(), aFontData, aDataLength);

  FT_Face face = Factory::NewFTFaceFromData(aFTLibrary, fontData.get(), aDataLength, 0);
  if (!face) {
    return nullptr;
  }
  if (FT_Select_Charmap(face, FT_ENCODING_UNICODE) != FT_Err_Ok) {
    Factory::ReleaseFTFace(face);
    return nullptr;
  }

  RefPtr<NativeFontResourceFontconfig> resource =
    new NativeFontResourceFontconfig(std::move(fontData), aDataLength, face);
  return resource.forget();
}

already_AddRefed<UnscaledFont>
NativeFontResourceFontconfig::CreateUnscaledFont(uint32_t aIndex,
                                                 const uint8_t* aInstanceData, uint32_t aInstanceDataLength)
{
  RefPtr<UnscaledFont> unscaledFont = new UnscaledFontFontconfig(mFace, this);
  return unscaledFont.forget();
}

FT_Face
NativeFontResourceFontconfig::CloneFace()
{
  return Factory::NewFTFaceFromData(mFace->glyph->library, mFontData.get(), mDataLength, 0);
}

} // gfx
} // mozilla