From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- gfx/thebes/gfxFontUtils.h | 1027 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1027 insertions(+) create mode 100644 gfx/thebes/gfxFontUtils.h (limited to 'gfx/thebes/gfxFontUtils.h') diff --git a/gfx/thebes/gfxFontUtils.h b/gfx/thebes/gfxFontUtils.h new file mode 100644 index 000000000..dd6a76558 --- /dev/null +++ b/gfx/thebes/gfxFontUtils.h @@ -0,0 +1,1027 @@ +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * 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 GFX_FONT_UTILS_H +#define GFX_FONT_UTILS_H + +#include "gfxPlatform.h" +#include "nsComponentManagerUtils.h" +#include "nsTArray.h" +#include "mozilla/Likely.h" +#include "mozilla/EndianUtils.h" +#include "mozilla/MemoryReporting.h" +#include "mozilla/UniquePtr.h" + +#include "zlib.h" +#include + +/* Bug 341128 - w32api defines min/max which causes problems with */ +#ifdef __MINGW32__ +#undef min +#undef max +#endif + +typedef struct hb_blob_t hb_blob_t; + +class gfxSparseBitSet { +private: + enum { BLOCK_SIZE = 32 }; // ==> 256 codepoints per block + enum { BLOCK_SIZE_BITS = BLOCK_SIZE * 8 }; + enum { BLOCK_INDEX_SHIFT = 8 }; + + struct Block { + Block(const Block& aBlock) { memcpy(mBits, aBlock.mBits, sizeof(mBits)); } + explicit Block(unsigned char memsetValue = 0) { memset(mBits, memsetValue, BLOCK_SIZE); } + uint8_t mBits[BLOCK_SIZE]; + }; + +public: + gfxSparseBitSet() { } + gfxSparseBitSet(const gfxSparseBitSet& aBitset) { + uint32_t len = aBitset.mBlocks.Length(); + mBlocks.AppendElements(len); + for (uint32_t i = 0; i < len; ++i) { + Block *block = aBitset.mBlocks[i].get(); + if (block) { + mBlocks[i] = mozilla::MakeUnique(*block); + } + } + } + + bool Equals(const gfxSparseBitSet *aOther) const { + if (mBlocks.Length() != aOther->mBlocks.Length()) { + return false; + } + size_t n = mBlocks.Length(); + for (size_t i = 0; i < n; ++i) { + const Block *b1 = mBlocks[i].get(); + const Block *b2 = aOther->mBlocks[i].get(); + if (!b1 != !b2) { + return false; + } + if (!b1) { + continue; + } + if (memcmp(&b1->mBits, &b2->mBits, BLOCK_SIZE) != 0) { + return false; + } + } + return true; + } + + bool test(uint32_t aIndex) const { + NS_ASSERTION(mBlocks.DebugGetHeader(), "mHdr is null, this is bad"); + uint32_t blockIndex = aIndex/BLOCK_SIZE_BITS; + if (blockIndex >= mBlocks.Length()) { + return false; + } + const Block *block = mBlocks[blockIndex].get(); + if (!block) { + return false; + } + return ((block->mBits[(aIndex>>3) & (BLOCK_SIZE - 1)]) & (1 << (aIndex & 0x7))) != 0; + } + + // dump out contents of bitmap + void Dump(const char* aPrefix, eGfxLog aWhichLog) const; + + bool TestRange(uint32_t aStart, uint32_t aEnd) { + uint32_t startBlock, endBlock, blockLen; + + // start point is beyond the end of the block array? return false immediately + startBlock = aStart >> BLOCK_INDEX_SHIFT; + blockLen = mBlocks.Length(); + if (startBlock >= blockLen) return false; + + // check for blocks in range, if none, return false + uint32_t blockIndex; + bool hasBlocksInRange = false; + + endBlock = aEnd >> BLOCK_INDEX_SHIFT; + for (blockIndex = startBlock; blockIndex <= endBlock; blockIndex++) { + if (blockIndex < blockLen && mBlocks[blockIndex]) { + hasBlocksInRange = true; + } + } + if (!hasBlocksInRange) { + return false; + } + + Block *block; + uint32_t i, start, end; + + // first block, check bits + if ((block = mBlocks[startBlock].get())) { + start = aStart; + end = std::min(aEnd, ((startBlock+1) << BLOCK_INDEX_SHIFT) - 1); + for (i = start; i <= end; i++) { + if ((block->mBits[(i>>3) & (BLOCK_SIZE - 1)]) & (1 << (i & 0x7))) { + return true; + } + } + } + if (endBlock == startBlock) { + return false; + } + + // [2..n-1] blocks check bytes + for (blockIndex = startBlock + 1; blockIndex < endBlock; blockIndex++) { + uint32_t index; + + if (blockIndex >= blockLen || + !(block = mBlocks[blockIndex].get())) { + continue; + } + for (index = 0; index < BLOCK_SIZE; index++) { + if (block->mBits[index]) { + return true; + } + } + } + + // last block, check bits + if (endBlock < blockLen && (block = mBlocks[endBlock].get())) { + start = endBlock << BLOCK_INDEX_SHIFT; + end = aEnd; + for (i = start; i <= end; i++) { + if ((block->mBits[(i>>3) & (BLOCK_SIZE - 1)]) & (1 << (i & 0x7))) { + return true; + } + } + } + + return false; + } + + void set(uint32_t aIndex) { + uint32_t blockIndex = aIndex/BLOCK_SIZE_BITS; + if (blockIndex >= mBlocks.Length()) { + mBlocks.AppendElements(blockIndex + 1 - mBlocks.Length()); + } + Block *block = mBlocks[blockIndex].get(); + if (!block) { + block = new Block; + mBlocks[blockIndex].reset(block); + } + block->mBits[(aIndex>>3) & (BLOCK_SIZE - 1)] |= 1 << (aIndex & 0x7); + } + + void set(uint32_t aIndex, bool aValue) { + if (aValue) + set(aIndex); + else + clear(aIndex); + } + + void SetRange(uint32_t aStart, uint32_t aEnd) { + const uint32_t startIndex = aStart/BLOCK_SIZE_BITS; + const uint32_t endIndex = aEnd/BLOCK_SIZE_BITS; + + if (endIndex >= mBlocks.Length()) { + uint32_t numNewBlocks = endIndex + 1 - mBlocks.Length(); + mBlocks.AppendElements(numNewBlocks); + } + + for (uint32_t i = startIndex; i <= endIndex; ++i) { + const uint32_t blockFirstBit = i * BLOCK_SIZE_BITS; + const uint32_t blockLastBit = blockFirstBit + BLOCK_SIZE_BITS - 1; + + Block *block = mBlocks[i].get(); + if (!block) { + bool fullBlock = + (aStart <= blockFirstBit && aEnd >= blockLastBit); + + block = new Block(fullBlock ? 0xFF : 0); + mBlocks[i].reset(block); + + if (fullBlock) { + continue; + } + } + + const uint32_t start = aStart > blockFirstBit ? aStart - blockFirstBit : 0; + const uint32_t end = std::min(aEnd - blockFirstBit, BLOCK_SIZE_BITS - 1); + + for (uint32_t bit = start; bit <= end; ++bit) { + block->mBits[bit>>3] |= 1 << (bit & 0x7); + } + } + } + + void clear(uint32_t aIndex) { + uint32_t blockIndex = aIndex/BLOCK_SIZE_BITS; + if (blockIndex >= mBlocks.Length()) { + mBlocks.AppendElements(blockIndex + 1 - mBlocks.Length()); + } + Block *block = mBlocks[blockIndex].get(); + if (!block) { + return; + } + block->mBits[(aIndex>>3) & (BLOCK_SIZE - 1)] &= ~(1 << (aIndex & 0x7)); + } + + void ClearRange(uint32_t aStart, uint32_t aEnd) { + const uint32_t startIndex = aStart/BLOCK_SIZE_BITS; + const uint32_t endIndex = aEnd/BLOCK_SIZE_BITS; + + if (endIndex >= mBlocks.Length()) { + uint32_t numNewBlocks = endIndex + 1 - mBlocks.Length(); + mBlocks.AppendElements(numNewBlocks); + } + + for (uint32_t i = startIndex; i <= endIndex; ++i) { + const uint32_t blockFirstBit = i * BLOCK_SIZE_BITS; + + Block *block = mBlocks[i].get(); + if (!block) { + // any nonexistent block is implicitly all clear, + // so there's no need to even create it + continue; + } + + const uint32_t start = aStart > blockFirstBit ? aStart - blockFirstBit : 0; + const uint32_t end = std::min(aEnd - blockFirstBit, BLOCK_SIZE_BITS - 1); + + for (uint32_t bit = start; bit <= end; ++bit) { + block->mBits[bit>>3] &= ~(1 << (bit & 0x7)); + } + } + } + + size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const { + size_t total = mBlocks.ShallowSizeOfExcludingThis(aMallocSizeOf); + for (uint32_t i = 0; i < mBlocks.Length(); i++) { + if (mBlocks[i]) { + total += aMallocSizeOf(mBlocks[i].get()); + } + } + return total; + } + + size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const { + return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf); + } + + // clear out all blocks in the array + void reset() { + uint32_t i; + for (i = 0; i < mBlocks.Length(); i++) { + mBlocks[i] = nullptr; + } + } + + // set this bitset to the union of its current contents and another + void Union(const gfxSparseBitSet& aBitset) { + // ensure mBlocks is large enough + uint32_t blockCount = aBitset.mBlocks.Length(); + if (blockCount > mBlocks.Length()) { + uint32_t needed = blockCount - mBlocks.Length(); + mBlocks.AppendElements(needed); + } + // for each block that may be present in aBitset... + for (uint32_t i = 0; i < blockCount; ++i) { + // if it is missing (implicitly empty), just skip + if (!aBitset.mBlocks[i]) { + continue; + } + // if the block is missing in this set, just copy the other + if (!mBlocks[i]) { + mBlocks[i] = mozilla::MakeUnique(*aBitset.mBlocks[i]); + continue; + } + // else set existing block to the union of both + uint32_t *dst = reinterpret_cast(mBlocks[i]->mBits); + const uint32_t *src = + reinterpret_cast(aBitset.mBlocks[i]->mBits); + for (uint32_t j = 0; j < BLOCK_SIZE / 4; ++j) { + dst[j] |= src[j]; + } + } + } + + void Compact() { + mBlocks.Compact(); + } + + uint32_t GetChecksum() const { + uint32_t check = adler32(0, Z_NULL, 0); + for (uint32_t i = 0; i < mBlocks.Length(); i++) { + if (mBlocks[i]) { + const Block *block = mBlocks[i].get(); + check = adler32(check, (uint8_t*) (&i), 4); + check = adler32(check, (uint8_t*) block, sizeof(Block)); + } + } + return check; + } + +private: + nsTArray> mBlocks; +}; + +#define TRUETYPE_TAG(a, b, c, d) ((a) << 24 | (b) << 16 | (c) << 8 | (d)) + +namespace mozilla { + +// Byte-swapping types and name table structure definitions moved from +// gfxFontUtils.cpp to .h file so that gfxFont.cpp can also refer to them +#pragma pack(1) + +struct AutoSwap_PRUint16 { +#ifdef __SUNPRO_CC + AutoSwap_PRUint16& operator = (const uint16_t aValue) + { + this->value = mozilla::NativeEndian::swapToBigEndian(aValue); + return *this; + } +#else + MOZ_IMPLICIT AutoSwap_PRUint16(uint16_t aValue) + { + value = mozilla::NativeEndian::swapToBigEndian(aValue); + } +#endif + operator uint16_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + + operator uint32_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + + operator uint64_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + +private: + uint16_t value; +}; + +struct AutoSwap_PRInt16 { +#ifdef __SUNPRO_CC + AutoSwap_PRInt16& operator = (const int16_t aValue) + { + this->value = mozilla::NativeEndian::swapToBigEndian(aValue); + return *this; + } +#else + MOZ_IMPLICIT AutoSwap_PRInt16(int16_t aValue) + { + value = mozilla::NativeEndian::swapToBigEndian(aValue); + } +#endif + operator int16_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + + operator uint32_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + +private: + int16_t value; +}; + +struct AutoSwap_PRUint32 { +#ifdef __SUNPRO_CC + AutoSwap_PRUint32& operator = (const uint32_t aValue) + { + this->value = mozilla::NativeEndian::swapToBigEndian(aValue); + return *this; + } +#else + MOZ_IMPLICIT AutoSwap_PRUint32(uint32_t aValue) + { + value = mozilla::NativeEndian::swapToBigEndian(aValue); + } +#endif + operator uint32_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + +private: + uint32_t value; +}; + +struct AutoSwap_PRInt32 { +#ifdef __SUNPRO_CC + AutoSwap_PRInt32& operator = (const int32_t aValue) + { + this->value = mozilla::NativeEndian::swapToBigEndian(aValue); + return *this; + } +#else + MOZ_IMPLICIT AutoSwap_PRInt32(int32_t aValue) + { + value = mozilla::NativeEndian::swapToBigEndian(aValue); + } +#endif + operator int32_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + +private: + int32_t value; +}; + +struct AutoSwap_PRUint64 { +#ifdef __SUNPRO_CC + AutoSwap_PRUint64& operator = (const uint64_t aValue) + { + this->value = mozilla::NativeEndian::swapToBigEndian(aValue); + return *this; + } +#else + MOZ_IMPLICIT AutoSwap_PRUint64(uint64_t aValue) + { + value = mozilla::NativeEndian::swapToBigEndian(aValue); + } +#endif + operator uint64_t() const + { + return mozilla::NativeEndian::swapFromBigEndian(value); + } + +private: + uint64_t value; +}; + +struct AutoSwap_PRUint24 { + operator uint32_t() const { return value[0] << 16 | value[1] << 8 | value[2]; } +private: + AutoSwap_PRUint24() { } + uint8_t value[3]; +}; + +struct SFNTHeader { + AutoSwap_PRUint32 sfntVersion; // Fixed, 0x00010000 for version 1.0. + AutoSwap_PRUint16 numTables; // Number of tables. + AutoSwap_PRUint16 searchRange; // (Maximum power of 2 <= numTables) x 16. + AutoSwap_PRUint16 entrySelector; // Log2(maximum power of 2 <= numTables). + AutoSwap_PRUint16 rangeShift; // NumTables x 16-searchRange. +}; + +struct TableDirEntry { + AutoSwap_PRUint32 tag; // 4 -byte identifier. + AutoSwap_PRUint32 checkSum; // CheckSum for this table. + AutoSwap_PRUint32 offset; // Offset from beginning of TrueType font file. + AutoSwap_PRUint32 length; // Length of this table. +}; + +struct HeadTable { + enum { + HEAD_VERSION = 0x00010000, + HEAD_MAGIC_NUMBER = 0x5F0F3CF5, + HEAD_CHECKSUM_CALC_CONST = 0xB1B0AFBA + }; + + AutoSwap_PRUint32 tableVersionNumber; // Fixed, 0x00010000 for version 1.0. + AutoSwap_PRUint32 fontRevision; // Set by font manufacturer. + AutoSwap_PRUint32 checkSumAdjustment; // To compute: set it to 0, sum the entire font as ULONG, then store 0xB1B0AFBA - sum. + AutoSwap_PRUint32 magicNumber; // Set to 0x5F0F3CF5. + AutoSwap_PRUint16 flags; + AutoSwap_PRUint16 unitsPerEm; // Valid range is from 16 to 16384. This value should be a power of 2 for fonts that have TrueType outlines. + AutoSwap_PRUint64 created; // Number of seconds since 12:00 midnight, January 1, 1904. 64-bit integer + AutoSwap_PRUint64 modified; // Number of seconds since 12:00 midnight, January 1, 1904. 64-bit integer + AutoSwap_PRInt16 xMin; // For all glyph bounding boxes. + AutoSwap_PRInt16 yMin; // For all glyph bounding boxes. + AutoSwap_PRInt16 xMax; // For all glyph bounding boxes. + AutoSwap_PRInt16 yMax; // For all glyph bounding boxes. + AutoSwap_PRUint16 macStyle; // Bit 0: Bold (if set to 1); + AutoSwap_PRUint16 lowestRecPPEM; // Smallest readable size in pixels. + AutoSwap_PRInt16 fontDirectionHint; + AutoSwap_PRInt16 indexToLocFormat; + AutoSwap_PRInt16 glyphDataFormat; +}; + +struct OS2Table { + AutoSwap_PRUint16 version; // 0004 = OpenType 1.5 + AutoSwap_PRInt16 xAvgCharWidth; + AutoSwap_PRUint16 usWeightClass; + AutoSwap_PRUint16 usWidthClass; + AutoSwap_PRUint16 fsType; + AutoSwap_PRInt16 ySubscriptXSize; + AutoSwap_PRInt16 ySubscriptYSize; + AutoSwap_PRInt16 ySubscriptXOffset; + AutoSwap_PRInt16 ySubscriptYOffset; + AutoSwap_PRInt16 ySuperscriptXSize; + AutoSwap_PRInt16 ySuperscriptYSize; + AutoSwap_PRInt16 ySuperscriptXOffset; + AutoSwap_PRInt16 ySuperscriptYOffset; + AutoSwap_PRInt16 yStrikeoutSize; + AutoSwap_PRInt16 yStrikeoutPosition; + AutoSwap_PRInt16 sFamilyClass; + uint8_t panose[10]; + AutoSwap_PRUint32 unicodeRange1; + AutoSwap_PRUint32 unicodeRange2; + AutoSwap_PRUint32 unicodeRange3; + AutoSwap_PRUint32 unicodeRange4; + uint8_t achVendID[4]; + AutoSwap_PRUint16 fsSelection; + AutoSwap_PRUint16 usFirstCharIndex; + AutoSwap_PRUint16 usLastCharIndex; + AutoSwap_PRInt16 sTypoAscender; + AutoSwap_PRInt16 sTypoDescender; + AutoSwap_PRInt16 sTypoLineGap; + AutoSwap_PRUint16 usWinAscent; + AutoSwap_PRUint16 usWinDescent; + AutoSwap_PRUint32 codePageRange1; + AutoSwap_PRUint32 codePageRange2; + AutoSwap_PRInt16 sxHeight; + AutoSwap_PRInt16 sCapHeight; + AutoSwap_PRUint16 usDefaultChar; + AutoSwap_PRUint16 usBreakChar; + AutoSwap_PRUint16 usMaxContext; +}; + +struct PostTable { + AutoSwap_PRUint32 version; + AutoSwap_PRInt32 italicAngle; + AutoSwap_PRInt16 underlinePosition; + AutoSwap_PRUint16 underlineThickness; + AutoSwap_PRUint32 isFixedPitch; + AutoSwap_PRUint32 minMemType42; + AutoSwap_PRUint32 maxMemType42; + AutoSwap_PRUint32 minMemType1; + AutoSwap_PRUint32 maxMemType1; +}; + +// This structure is used for both 'hhea' and 'vhea' tables. +// The field names here are those of the horizontal version; the +// vertical table just exchanges vertical and horizontal coordinates. +struct MetricsHeader { + AutoSwap_PRUint32 version; + AutoSwap_PRInt16 ascender; + AutoSwap_PRInt16 descender; + AutoSwap_PRInt16 lineGap; + AutoSwap_PRUint16 advanceWidthMax; + AutoSwap_PRInt16 minLeftSideBearing; + AutoSwap_PRInt16 minRightSideBearing; + AutoSwap_PRInt16 xMaxExtent; + AutoSwap_PRInt16 caretSlopeRise; + AutoSwap_PRInt16 caretSlopeRun; + AutoSwap_PRInt16 caretOffset; + AutoSwap_PRInt16 reserved1; + AutoSwap_PRInt16 reserved2; + AutoSwap_PRInt16 reserved3; + AutoSwap_PRInt16 reserved4; + AutoSwap_PRInt16 metricDataFormat; + AutoSwap_PRUint16 numOfLongMetrics; +}; + +struct MaxpTableHeader { + AutoSwap_PRUint32 version; // CFF: 0x00005000; TrueType: 0x00010000 + AutoSwap_PRUint16 numGlyphs; +// truetype version has additional fields that we don't currently use +}; + +// old 'kern' table, supported on Windows +// see http://www.microsoft.com/typography/otspec/kern.htm +struct KernTableVersion0 { + AutoSwap_PRUint16 version; // 0x0000 + AutoSwap_PRUint16 nTables; +}; + +struct KernTableSubtableHeaderVersion0 { + AutoSwap_PRUint16 version; + AutoSwap_PRUint16 length; + AutoSwap_PRUint16 coverage; +}; + +// newer Mac-only 'kern' table, ignored by Windows +// see http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6kern.html +struct KernTableVersion1 { + AutoSwap_PRUint32 version; // 0x00010000 + AutoSwap_PRUint32 nTables; +}; + +struct KernTableSubtableHeaderVersion1 { + AutoSwap_PRUint32 length; + AutoSwap_PRUint16 coverage; + AutoSwap_PRUint16 tupleIndex; +}; + +struct COLRHeader { + AutoSwap_PRUint16 version; + AutoSwap_PRUint16 numBaseGlyphRecord; + AutoSwap_PRUint32 offsetBaseGlyphRecord; + AutoSwap_PRUint32 offsetLayerRecord; + AutoSwap_PRUint16 numLayerRecords; +}; + +struct CPALHeaderVersion0 { + AutoSwap_PRUint16 version; + AutoSwap_PRUint16 numPaletteEntries; + AutoSwap_PRUint16 numPalettes; + AutoSwap_PRUint16 numColorRecords; + AutoSwap_PRUint32 offsetFirstColorRecord; +}; + +#pragma pack() + +// Return just the highest bit of the given value, i.e., the highest +// power of 2 that is <= value, or zero if the input value is zero. +inline uint32_t +FindHighestBit(uint32_t value) +{ + // propagate highest bit into all lower bits of the value + value |= (value >> 1); + value |= (value >> 2); + value |= (value >> 4); + value |= (value >> 8); + value |= (value >> 16); + // isolate the leftmost bit + return (value & ~(value >> 1)); +} + +} // namespace mozilla + +// used for overlaying name changes without touching original font data +struct FontDataOverlay { + // overlaySrc != 0 ==> use overlay + uint32_t overlaySrc; // src offset from start of font data + uint32_t overlaySrcLen; // src length + uint32_t overlayDest; // dest offset from start of font data +}; + +enum gfxUserFontType { + GFX_USERFONT_UNKNOWN = 0, + GFX_USERFONT_OPENTYPE = 1, + GFX_USERFONT_SVG = 2, + GFX_USERFONT_WOFF = 3, + GFX_USERFONT_WOFF2 = 4 +}; +#define GFX_PREF_WOFF2_ENABLED "gfx.downloadable_fonts.woff2.enabled" + +extern const uint8_t sCJKCompatSVSTable[]; + +class gfxFontUtils { + +public: + // these are public because gfxFont.cpp also looks into the name table + enum { + NAME_ID_FAMILY = 1, + NAME_ID_STYLE = 2, + NAME_ID_UNIQUE = 3, + NAME_ID_FULL = 4, + NAME_ID_VERSION = 5, + NAME_ID_POSTSCRIPT = 6, + NAME_ID_PREFERRED_FAMILY = 16, + NAME_ID_PREFERRED_STYLE = 17, + + PLATFORM_ALL = -1, + PLATFORM_ID_UNICODE = 0, // Mac OS uses this typically + PLATFORM_ID_MAC = 1, + PLATFORM_ID_ISO = 2, + PLATFORM_ID_MICROSOFT = 3, + + ENCODING_ID_MAC_ROMAN = 0, // traditional Mac OS script manager encodings + ENCODING_ID_MAC_JAPANESE = 1, // (there are others defined, but some were never + ENCODING_ID_MAC_TRAD_CHINESE = 2, // implemented by Apple, and I have never seen them + ENCODING_ID_MAC_KOREAN = 3, // used in font names) + ENCODING_ID_MAC_ARABIC = 4, + ENCODING_ID_MAC_HEBREW = 5, + ENCODING_ID_MAC_GREEK = 6, + ENCODING_ID_MAC_CYRILLIC = 7, + ENCODING_ID_MAC_DEVANAGARI = 9, + ENCODING_ID_MAC_GURMUKHI = 10, + ENCODING_ID_MAC_GUJARATI = 11, + ENCODING_ID_MAC_SIMP_CHINESE = 25, + + ENCODING_ID_MICROSOFT_SYMBOL = 0, // Microsoft platform encoding IDs + ENCODING_ID_MICROSOFT_UNICODEBMP = 1, + ENCODING_ID_MICROSOFT_SHIFTJIS = 2, + ENCODING_ID_MICROSOFT_PRC = 3, + ENCODING_ID_MICROSOFT_BIG5 = 4, + ENCODING_ID_MICROSOFT_WANSUNG = 5, + ENCODING_ID_MICROSOFT_JOHAB = 6, + ENCODING_ID_MICROSOFT_UNICODEFULL = 10, + + LANG_ALL = -1, + LANG_ID_MAC_ENGLISH = 0, // many others are defined, but most don't affect + LANG_ID_MAC_HEBREW = 10, // the charset; should check all the central/eastern + LANG_ID_MAC_JAPANESE = 11, // european codes, though + LANG_ID_MAC_ARABIC = 12, + LANG_ID_MAC_ICELANDIC = 15, + LANG_ID_MAC_TURKISH = 17, + LANG_ID_MAC_TRAD_CHINESE = 19, + LANG_ID_MAC_URDU = 20, + LANG_ID_MAC_KOREAN = 23, + LANG_ID_MAC_POLISH = 25, + LANG_ID_MAC_FARSI = 31, + LANG_ID_MAC_SIMP_CHINESE = 33, + LANG_ID_MAC_ROMANIAN = 37, + LANG_ID_MAC_CZECH = 38, + LANG_ID_MAC_SLOVAK = 39, + + LANG_ID_MICROSOFT_EN_US = 0x0409, // with Microsoft platformID, EN US lang code + + CMAP_MAX_CODEPOINT = 0x10ffff // maximum possible Unicode codepoint + // contained in a cmap + }; + + // name table has a header, followed by name records, followed by string data + struct NameHeader { + mozilla::AutoSwap_PRUint16 format; // Format selector (=0). + mozilla::AutoSwap_PRUint16 count; // Number of name records. + mozilla::AutoSwap_PRUint16 stringOffset; // Offset to start of string storage + // (from start of table) + }; + + struct NameRecord { + mozilla::AutoSwap_PRUint16 platformID; // Platform ID + mozilla::AutoSwap_PRUint16 encodingID; // Platform-specific encoding ID + mozilla::AutoSwap_PRUint16 languageID; // Language ID + mozilla::AutoSwap_PRUint16 nameID; // Name ID. + mozilla::AutoSwap_PRUint16 length; // String length (in bytes). + mozilla::AutoSwap_PRUint16 offset; // String offset from start of storage + // (in bytes). + }; + + // for reading big-endian font data on either big or little-endian platforms + + static inline uint16_t + ReadShortAt(const uint8_t *aBuf, uint32_t aIndex) + { + return (aBuf[aIndex] << 8) | aBuf[aIndex + 1]; + } + + static inline uint16_t + ReadShortAt16(const uint16_t *aBuf, uint32_t aIndex) + { + const uint8_t *buf = reinterpret_cast(aBuf); + uint32_t index = aIndex << 1; + return (buf[index] << 8) | buf[index+1]; + } + + static inline uint32_t + ReadUint24At(const uint8_t *aBuf, uint32_t aIndex) + { + return ((aBuf[aIndex] << 16) | (aBuf[aIndex + 1] << 8) | + (aBuf[aIndex + 2])); + } + + static inline uint32_t + ReadLongAt(const uint8_t *aBuf, uint32_t aIndex) + { + return ((aBuf[aIndex] << 24) | (aBuf[aIndex + 1] << 16) | + (aBuf[aIndex + 2] << 8) | (aBuf[aIndex + 3])); + } + + static nsresult + ReadCMAPTableFormat10(const uint8_t *aBuf, uint32_t aLength, + gfxSparseBitSet& aCharacterMap); + + static nsresult + ReadCMAPTableFormat12(const uint8_t *aBuf, uint32_t aLength, + gfxSparseBitSet& aCharacterMap); + + static nsresult + ReadCMAPTableFormat4(const uint8_t *aBuf, uint32_t aLength, + gfxSparseBitSet& aCharacterMap); + + static nsresult + ReadCMAPTableFormat14(const uint8_t *aBuf, uint32_t aLength, + mozilla::UniquePtr& aTable); + + static uint32_t + FindPreferredSubtable(const uint8_t *aBuf, uint32_t aBufLength, + uint32_t *aTableOffset, uint32_t *aUVSTableOffset, + bool *aSymbolEncoding); + + static nsresult + ReadCMAP(const uint8_t *aBuf, uint32_t aBufLength, + gfxSparseBitSet& aCharacterMap, + uint32_t& aUVSOffset, + bool& aUnicodeFont, bool& aSymbolFont); + + static uint32_t + MapCharToGlyphFormat4(const uint8_t *aBuf, char16_t aCh); + + static uint32_t + MapCharToGlyphFormat10(const uint8_t *aBuf, uint32_t aCh); + + static uint32_t + MapCharToGlyphFormat12(const uint8_t *aBuf, uint32_t aCh); + + static uint16_t + MapUVSToGlyphFormat14(const uint8_t *aBuf, uint32_t aCh, uint32_t aVS); + + // sCJKCompatSVSTable is a 'cmap' format 14 subtable that maps + // pairs to the corresponding Unicode + // compatibility ideograph codepoints. + static MOZ_ALWAYS_INLINE uint32_t + GetUVSFallback(uint32_t aCh, uint32_t aVS) { + aCh = MapUVSToGlyphFormat14(sCJKCompatSVSTable, aCh, aVS); + return aCh >= 0xFB00 ? aCh + (0x2F800 - 0xFB00) : aCh; + } + + static uint32_t + MapCharToGlyph(const uint8_t *aCmapBuf, uint32_t aBufLength, + uint32_t aUnicode, uint32_t aVarSelector = 0); + +#ifdef XP_WIN + // determine whether a font (which has already been sanitized, so is known + // to be a valid sfnt) is CFF format rather than TrueType + static bool + IsCffFont(const uint8_t* aFontData); +#endif + + // determine the format of font data + static gfxUserFontType + DetermineFontDataType(const uint8_t *aFontData, uint32_t aFontDataLength); + + // Read the fullname from the sfnt data (used to save the original name + // prior to renaming the font for installation). + // This is called with sfnt data that has already been validated, + // so it should always succeed in finding the name table. + static nsresult + GetFullNameFromSFNT(const uint8_t* aFontData, uint32_t aLength, + nsAString& aFullName); + + // helper to get fullname from name table, constructing from family+style + // if no explicit fullname is present + static nsresult + GetFullNameFromTable(hb_blob_t *aNameTable, + nsAString& aFullName); + + // helper to get family name from name table + static nsresult + GetFamilyNameFromTable(hb_blob_t *aNameTable, + nsAString& aFamilyName); + + // Find the table directory entry for a given table tag, in a (validated) + // buffer of 'sfnt' data. Returns null if the tag is not present. + static mozilla::TableDirEntry* + FindTableDirEntry(const void* aFontData, uint32_t aTableTag); + + // Return a blob that wraps a table found within a buffer of font data. + // The blob does NOT own its data; caller guarantees that the buffer + // will remain valid at least as long as the blob. + // Returns null if the specified table is not found. + // This method assumes aFontData is valid 'sfnt' data; before using this, + // caller is responsible to do any sanitization/validation necessary. + static hb_blob_t* + GetTableFromFontData(const void* aFontData, uint32_t aTableTag); + + // create a new name table and build a new font with that name table + // appended on the end, returns true on success + static nsresult + RenameFont(const nsAString& aName, const uint8_t *aFontData, + uint32_t aFontDataLength, FallibleTArray *aNewFont); + + // read all names matching aNameID, returning in aNames array + static nsresult + ReadNames(const char *aNameData, uint32_t aDataLen, uint32_t aNameID, + int32_t aPlatformID, nsTArray& aNames); + + // reads English or first name matching aNameID, returning in aName + // platform based on OS + static nsresult + ReadCanonicalName(hb_blob_t *aNameTable, uint32_t aNameID, + nsString& aName); + + static nsresult + ReadCanonicalName(const char *aNameData, uint32_t aDataLen, + uint32_t aNameID, nsString& aName); + + // convert a name from the raw name table data into an nsString, + // provided we know how; return true if successful, or false + // if we can't handle the encoding + static bool + DecodeFontName(const char *aBuf, int32_t aLength, + uint32_t aPlatformCode, uint32_t aScriptCode, + uint32_t aLangCode, nsAString& dest); + + static inline bool IsJoinCauser(uint32_t ch) { + return (ch == 0x200D); + } + + static inline bool IsJoinControl(uint32_t ch) { + return (ch == 0x200C || ch == 0x200D); + } + + enum { + kUnicodeVS1 = 0xFE00, + kUnicodeVS16 = 0xFE0F, + kUnicodeVS17 = 0xE0100, + kUnicodeVS256 = 0xE01EF + }; + + static inline bool IsVarSelector(uint32_t ch) { + return (ch >= kUnicodeVS1 && ch <= kUnicodeVS16) || + (ch >= kUnicodeVS17 && ch <= kUnicodeVS256); + } + + enum { + kUnicodeRegionalIndicatorA = 0x1F1E6, + kUnicodeRegionalIndicatorZ = 0x1F1FF + }; + + static inline bool IsRegionalIndicator(uint32_t aCh) { + return aCh >= kUnicodeRegionalIndicatorA && + aCh <= kUnicodeRegionalIndicatorZ; + } + + static inline bool IsInvalid(uint32_t ch) { + return (ch == 0xFFFD); + } + + // Font code may want to know if there is the potential for bidi behavior + // to be triggered by any of the characters in a text run; this can be + // used to test that possibility. + enum { + kUnicodeBidiScriptsStart = 0x0590, + kUnicodeBidiScriptsEnd = 0x08FF, + kUnicodeBidiPresentationStart = 0xFB1D, + kUnicodeBidiPresentationEnd = 0xFEFC, + kUnicodeFirstHighSurrogateBlock = 0xD800, + kUnicodeRLM = 0x200F, + kUnicodeRLE = 0x202B, + kUnicodeRLO = 0x202E + }; + + static inline bool PotentialRTLChar(char16_t aCh) { + if (aCh >= kUnicodeBidiScriptsStart && aCh <= kUnicodeBidiScriptsEnd) + // bidi scripts Hebrew, Arabic, Syriac, Thaana, N'Ko are all encoded together + return true; + + if (aCh == kUnicodeRLM || aCh == kUnicodeRLE || aCh == kUnicodeRLO) + // directional controls that trigger bidi layout + return true; + + if (aCh >= kUnicodeBidiPresentationStart && + aCh <= kUnicodeBidiPresentationEnd) + // presentation forms of Arabic and Hebrew letters + return true; + + if ((aCh & 0xFF00) == kUnicodeFirstHighSurrogateBlock) + // surrogate that could be part of a bidi supplementary char + // (Cypriot, Aramaic, Phoenecian, etc) + return true; + + // otherwise we know this char cannot trigger bidi reordering + return false; + } + + // parse a simple list of font family names into + // an array of strings + static void ParseFontList(const nsAString& aFamilyList, + nsTArray& aFontList); + + // for a given font list pref name, append list of font names + static void AppendPrefsFontList(const char *aPrefName, + nsTArray& aFontList); + + // for a given font list pref name, initialize a list of font names + static void GetPrefsFontList(const char *aPrefName, + nsTArray& aFontList); + + // generate a unique font name + static nsresult MakeUniqueUserFontName(nsAString& aName); + + // for color layer from glyph using COLR and CPAL tables + static bool ValidateColorGlyphs(hb_blob_t* aCOLR, hb_blob_t* aCPAL); + static bool GetColorGlyphLayers(hb_blob_t* aCOLR, + hb_blob_t* aCPAL, + uint32_t aGlyphId, + const mozilla::gfx::Color& aDefaultColor, + nsTArray &aGlyphs, + nsTArray &aColors); + +protected: + friend struct MacCharsetMappingComparator; + + static nsresult + ReadNames(const char *aNameData, uint32_t aDataLen, uint32_t aNameID, + int32_t aLangID, int32_t aPlatformID, nsTArray& aNames); + + // convert opentype name-table platform/encoding/language values to a charset name + // we can use to convert the name data to unicode, or "" if data is UTF16BE + static const char* + GetCharsetForFontName(uint16_t aPlatform, uint16_t aScript, uint16_t aLanguage); + + struct MacFontNameCharsetMapping { + uint16_t mEncoding; + uint16_t mLanguage; + const char *mCharsetName; + + bool operator<(const MacFontNameCharsetMapping& rhs) const { + return (mEncoding < rhs.mEncoding) || + ((mEncoding == rhs.mEncoding) && (mLanguage < rhs.mLanguage)); + } + }; + static const MacFontNameCharsetMapping gMacFontNameCharsets[]; + static const char* gISOFontNameCharsets[]; + static const char* gMSFontNameCharsets[]; +}; + +#endif /* GFX_FONT_UTILS_H */ -- cgit v1.2.3