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