зеркало из https://github.com/mozilla/gecko-dev.git
94 строки
3.1 KiB
C++
94 строки
3.1 KiB
C++
/* -*- 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"
|
|
#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 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();
|
|
|
|
/**
|
|
* 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() = default;
|
|
|
|
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;
|
|
};
|
|
|
|
} // namespace gfx
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_gfx_SFNTData_h
|