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60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_gfx_SFNTData_h
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#define mozilla_gfx_SFNTData_h
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#include "mozilla/UniquePtr.h"
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#include "mozilla/Vector.h"
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namespace mozilla {
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namespace gfx {
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class SFNTData final {
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public:
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/**
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* Creates an SFNTData if the header is a format that we understand and
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* aDataLength is sufficient for the length information in the header data.
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* Note that the data is NOT copied, so must exist the SFNTData's lifetime.
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*
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* @param aFontData the SFNT data.
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* @param aDataLength length
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* @return UniquePtr to a SFNTData or nullptr if the header is invalid.
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*/
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static UniquePtr<SFNTData> Create(const uint8_t* aFontData,
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uint32_t aDataLength);
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/**
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* Creates a unique key for the given font data and variation settings.
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*
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* @param aFontData the SFNT data
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* @param aDataLength length
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* @return unique key to be used for caching
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*/
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static uint64_t GetUniqueKey(const uint8_t* aFontData, uint32_t aDataLength,
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uint32_t aVarDataSize, const void* aVarData);
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~SFNTData();
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private:
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SFNTData() = default;
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bool AddFont(const uint8_t* aFontData, uint32_t aDataLength,
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uint32_t aOffset);
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uint32_t HashHeadAndCmapTables();
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// Internal representation of single font in font file.
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class Font;
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Vector<Font*> mFonts;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // mozilla_gfx_SFNTData_h
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