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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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"
#include "u16string.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.
*
* @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);
~SFNTData();
/**
* Gets the full name from the name table of the font corresponding to the
* index. If the full name string is not present it will use the family space
* concatenated with the style.
* This will only read names that are already UTF16.
*
* @param aFontData SFNT data.
* @param aDataLength length of aFontData.
* @param aU16FullName string to be populated with the full name.
* @return true if the full name is successfully read.
*/
bool GetU16FullName(uint32_t aIndex, mozilla::u16string& aU16FullName);
/**
* Populate a Vector with the first UTF16 full name from each name table of
* the fonts. If the full name string is not present it will use the family
* space concatenated with the style.
* This will only read names that are already UTF16.
*
* @param aU16FullNames the Vector to be populated.
* @return true if at least one name found otherwise false.
*/
bool GetU16FullNames(Vector<mozilla::u16string>& aU16FullNames);
/**
* Returns the index for the first UTF16 name matching aU16FullName.
*
* @param aU16FullName full name to find.
* @param aIndex out param for the index if found.
* @param aTruncatedLen length to truncate the compared font name to.
* @return true if the full name is successfully read.
*/
bool GetIndexForU16Name(const mozilla::u16string& aU16FullName, uint32_t* aIndex,
size_t aTruncatedLen = 0);
private:
SFNTData() {}
bool AddFont(const uint8_t *aFontData, uint32_t aDataLength,
uint32_t aOffset);
// Internal representation of single font in font file.
class Font;
Vector<Font*> mFonts;
};
} // gfx
} // mozilla
#endif // mozilla_gfx_SFNTData_h
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