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/* -*- 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_SFNTData_h
#define mozilla_gfx_SFNTData_h
#include "mozilla/UniquePtr.h"
#include "mozilla/Vector.h"
namespace mozilla {
namespace gfx {
class SFNTData final {
public:
/**
* Creates an SFNTData if the header is a format that we understand and
* aDataLength is sufficient for the length information in the header data.
* Note that the data is NOT copied, so must exist the SFNTData's lifetime.
*
* @param aFontData the SFNT data.
* @param aDataLength length
* @return UniquePtr to a SFNTData or nullptr if the header is invalid.
*/
static UniquePtr<SFNTData> Create(const uint8_t* aFontData,
uint32_t aDataLength);
/**
* Creates a unique key for the given font data and variation settings.
*
* @param aFontData the SFNT data
* @param aDataLength length
* @return unique key to be used for caching
*/
static uint64_t GetUniqueKey(const uint8_t* aFontData, uint32_t aDataLength,
uint32_t aVarDataSize, const void* aVarData);
~SFNTData();
private:
SFNTData() = default;
bool AddFont(const uint8_t* aFontData, uint32_t aDataLength,
uint32_t aOffset);
uint32_t HashHeadAndCmapTables();
// Internal representation of single font in font file.
class Font;
Vector<Font*> mFonts;
};
} // namespace gfx
} // namespace mozilla
#endif // mozilla_gfx_SFNTData_h
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