mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-11 02:56:06 +00:00
1011 lines
34 KiB
C++
1011 lines
34 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 GFX_FONT_UTILS_H
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#define GFX_FONT_UTILS_H
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#include "gfxPlatform.h"
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#include "nsComponentManagerUtils.h"
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#include "nsTArray.h"
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#include "nsAutoPtr.h"
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#include "mozilla/Likely.h"
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#include "mozilla/Endian.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/UniquePtr.h"
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#include "zlib.h"
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#include <algorithm>
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/* Bug 341128 - w32api defines min/max which causes problems with <bitset> */
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#ifdef __MINGW32__
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#undef min
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#undef max
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#endif
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typedef struct hb_blob_t hb_blob_t;
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class gfxSparseBitSet {
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private:
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enum { BLOCK_SIZE = 32 }; // ==> 256 codepoints per block
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enum { BLOCK_SIZE_BITS = BLOCK_SIZE * 8 };
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enum { BLOCK_INDEX_SHIFT = 8 };
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struct Block {
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Block(const Block& aBlock) { memcpy(mBits, aBlock.mBits, sizeof(mBits)); }
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explicit Block(unsigned char memsetValue = 0) { memset(mBits, memsetValue, BLOCK_SIZE); }
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uint8_t mBits[BLOCK_SIZE];
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};
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public:
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gfxSparseBitSet() { }
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gfxSparseBitSet(const gfxSparseBitSet& aBitset) {
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uint32_t len = aBitset.mBlocks.Length();
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mBlocks.AppendElements(len);
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for (uint32_t i = 0; i < len; ++i) {
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Block *block = aBitset.mBlocks[i];
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if (block)
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mBlocks[i] = new Block(*block);
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}
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}
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bool Equals(const gfxSparseBitSet *aOther) const {
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if (mBlocks.Length() != aOther->mBlocks.Length()) {
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return false;
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}
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size_t n = mBlocks.Length();
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for (size_t i = 0; i < n; ++i) {
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const Block *b1 = mBlocks[i];
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const Block *b2 = aOther->mBlocks[i];
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if (!b1 != !b2) {
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return false;
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}
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if (!b1) {
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continue;
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}
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if (memcmp(&b1->mBits, &b2->mBits, BLOCK_SIZE) != 0) {
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return false;
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}
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}
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return true;
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}
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bool test(uint32_t aIndex) const {
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NS_ASSERTION(mBlocks.DebugGetHeader(), "mHdr is null, this is bad");
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uint32_t blockIndex = aIndex/BLOCK_SIZE_BITS;
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if (blockIndex >= mBlocks.Length())
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return false;
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Block *block = mBlocks[blockIndex];
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if (!block)
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return false;
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return ((block->mBits[(aIndex>>3) & (BLOCK_SIZE - 1)]) & (1 << (aIndex & 0x7))) != 0;
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}
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// dump out contents of bitmap
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void Dump(const char* aPrefix, eGfxLog aWhichLog) const;
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bool TestRange(uint32_t aStart, uint32_t aEnd) {
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uint32_t startBlock, endBlock, blockLen;
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// start point is beyond the end of the block array? return false immediately
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startBlock = aStart >> BLOCK_INDEX_SHIFT;
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blockLen = mBlocks.Length();
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if (startBlock >= blockLen) return false;
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// check for blocks in range, if none, return false
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uint32_t blockIndex;
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bool hasBlocksInRange = false;
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endBlock = aEnd >> BLOCK_INDEX_SHIFT;
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for (blockIndex = startBlock; blockIndex <= endBlock; blockIndex++) {
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if (blockIndex < blockLen && mBlocks[blockIndex])
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hasBlocksInRange = true;
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}
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if (!hasBlocksInRange) return false;
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Block *block;
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uint32_t i, start, end;
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// first block, check bits
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if ((block = mBlocks[startBlock])) {
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start = aStart;
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end = std::min(aEnd, ((startBlock+1) << BLOCK_INDEX_SHIFT) - 1);
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for (i = start; i <= end; i++) {
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if ((block->mBits[(i>>3) & (BLOCK_SIZE - 1)]) & (1 << (i & 0x7)))
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return true;
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}
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}
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if (endBlock == startBlock) return false;
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// [2..n-1] blocks check bytes
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for (blockIndex = startBlock + 1; blockIndex < endBlock; blockIndex++) {
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uint32_t index;
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if (blockIndex >= blockLen || !(block = mBlocks[blockIndex])) continue;
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for (index = 0; index < BLOCK_SIZE; index++) {
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if (block->mBits[index])
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return true;
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}
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}
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// last block, check bits
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if (endBlock < blockLen && (block = mBlocks[endBlock])) {
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start = endBlock << BLOCK_INDEX_SHIFT;
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end = aEnd;
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for (i = start; i <= end; i++) {
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if ((block->mBits[(i>>3) & (BLOCK_SIZE - 1)]) & (1 << (i & 0x7)))
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return true;
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}
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}
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return false;
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}
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void set(uint32_t aIndex) {
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uint32_t blockIndex = aIndex/BLOCK_SIZE_BITS;
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if (blockIndex >= mBlocks.Length()) {
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nsAutoPtr<Block> *blocks = mBlocks.AppendElements(blockIndex + 1 - mBlocks.Length());
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if (MOZ_UNLIKELY(!blocks)) // OOM
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return;
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}
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Block *block = mBlocks[blockIndex];
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if (!block) {
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block = new Block;
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mBlocks[blockIndex] = block;
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}
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block->mBits[(aIndex>>3) & (BLOCK_SIZE - 1)] |= 1 << (aIndex & 0x7);
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}
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void set(uint32_t aIndex, bool aValue) {
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if (aValue)
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set(aIndex);
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else
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clear(aIndex);
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}
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void SetRange(uint32_t aStart, uint32_t aEnd) {
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const uint32_t startIndex = aStart/BLOCK_SIZE_BITS;
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const uint32_t endIndex = aEnd/BLOCK_SIZE_BITS;
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if (endIndex >= mBlocks.Length()) {
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uint32_t numNewBlocks = endIndex + 1 - mBlocks.Length();
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nsAutoPtr<Block> *blocks = mBlocks.AppendElements(numNewBlocks);
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if (MOZ_UNLIKELY(!blocks)) // OOM
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return;
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}
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for (uint32_t i = startIndex; i <= endIndex; ++i) {
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const uint32_t blockFirstBit = i * BLOCK_SIZE_BITS;
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const uint32_t blockLastBit = blockFirstBit + BLOCK_SIZE_BITS - 1;
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Block *block = mBlocks[i];
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if (!block) {
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bool fullBlock = false;
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if (aStart <= blockFirstBit && aEnd >= blockLastBit)
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fullBlock = true;
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block = new Block(fullBlock ? 0xFF : 0);
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mBlocks[i] = block;
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if (fullBlock)
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continue;
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}
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const uint32_t start = aStart > blockFirstBit ? aStart - blockFirstBit : 0;
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const uint32_t end = std::min<uint32_t>(aEnd - blockFirstBit, BLOCK_SIZE_BITS - 1);
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for (uint32_t bit = start; bit <= end; ++bit) {
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block->mBits[bit>>3] |= 1 << (bit & 0x7);
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}
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}
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}
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void clear(uint32_t aIndex) {
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uint32_t blockIndex = aIndex/BLOCK_SIZE_BITS;
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if (blockIndex >= mBlocks.Length()) {
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nsAutoPtr<Block> *blocks = mBlocks.AppendElements(blockIndex + 1 - mBlocks.Length());
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if (MOZ_UNLIKELY(!blocks)) // OOM
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return;
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}
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Block *block = mBlocks[blockIndex];
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if (!block) {
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return;
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}
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block->mBits[(aIndex>>3) & (BLOCK_SIZE - 1)] &= ~(1 << (aIndex & 0x7));
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}
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void ClearRange(uint32_t aStart, uint32_t aEnd) {
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const uint32_t startIndex = aStart/BLOCK_SIZE_BITS;
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const uint32_t endIndex = aEnd/BLOCK_SIZE_BITS;
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if (endIndex >= mBlocks.Length()) {
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uint32_t numNewBlocks = endIndex + 1 - mBlocks.Length();
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nsAutoPtr<Block> *blocks = mBlocks.AppendElements(numNewBlocks);
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if (MOZ_UNLIKELY(!blocks)) // OOM
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return;
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}
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for (uint32_t i = startIndex; i <= endIndex; ++i) {
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const uint32_t blockFirstBit = i * BLOCK_SIZE_BITS;
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Block *block = mBlocks[i];
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if (!block) {
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// any nonexistent block is implicitly all clear,
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// so there's no need to even create it
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continue;
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}
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const uint32_t start = aStart > blockFirstBit ? aStart - blockFirstBit : 0;
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const uint32_t end = std::min<uint32_t>(aEnd - blockFirstBit, BLOCK_SIZE_BITS - 1);
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for (uint32_t bit = start; bit <= end; ++bit) {
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block->mBits[bit>>3] &= ~(1 << (bit & 0x7));
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}
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}
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}
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size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
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size_t total = mBlocks.ShallowSizeOfExcludingThis(aMallocSizeOf);
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for (uint32_t i = 0; i < mBlocks.Length(); i++) {
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if (mBlocks[i]) {
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total += aMallocSizeOf(mBlocks[i]);
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}
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}
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return total;
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}
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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// clear out all blocks in the array
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void reset() {
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uint32_t i;
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for (i = 0; i < mBlocks.Length(); i++)
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mBlocks[i] = nullptr;
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}
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// set this bitset to the union of its current contents and another
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void Union(const gfxSparseBitSet& aBitset) {
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// ensure mBlocks is large enough
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uint32_t blockCount = aBitset.mBlocks.Length();
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if (blockCount > mBlocks.Length()) {
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uint32_t needed = blockCount - mBlocks.Length();
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nsAutoPtr<Block> *blocks = mBlocks.AppendElements(needed);
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if (MOZ_UNLIKELY(!blocks)) { // OOM
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return;
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}
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}
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// for each block that may be present in aBitset...
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for (uint32_t i = 0; i < blockCount; ++i) {
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// if it is missing (implicitly empty), just skip
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if (!aBitset.mBlocks[i]) {
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continue;
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}
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// if the block is missing in this set, just copy the other
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if (!mBlocks[i]) {
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mBlocks[i] = new Block(*aBitset.mBlocks[i]);
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continue;
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}
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// else set existing block to the union of both
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uint32_t *dst = reinterpret_cast<uint32_t*>(mBlocks[i]->mBits);
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const uint32_t *src =
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reinterpret_cast<const uint32_t*>(aBitset.mBlocks[i]->mBits);
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for (uint32_t j = 0; j < BLOCK_SIZE / 4; ++j) {
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dst[j] |= src[j];
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}
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}
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}
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void Compact() {
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mBlocks.Compact();
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}
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uint32_t GetChecksum() const {
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uint32_t check = adler32(0, Z_NULL, 0);
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for (uint32_t i = 0; i < mBlocks.Length(); i++) {
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if (mBlocks[i]) {
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const Block *block = mBlocks[i];
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check = adler32(check, (uint8_t*) (&i), 4);
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check = adler32(check, (uint8_t*) block, sizeof(Block));
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}
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}
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return check;
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}
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private:
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nsTArray< nsAutoPtr<Block> > mBlocks;
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};
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#define TRUETYPE_TAG(a, b, c, d) ((a) << 24 | (b) << 16 | (c) << 8 | (d))
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namespace mozilla {
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// Byte-swapping types and name table structure definitions moved from
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// gfxFontUtils.cpp to .h file so that gfxFont.cpp can also refer to them
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#pragma pack(1)
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struct AutoSwap_PRUint16 {
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#ifdef __SUNPRO_CC
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AutoSwap_PRUint16& operator = (const uint16_t aValue)
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{
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this->value = mozilla::NativeEndian::swapToBigEndian(aValue);
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return *this;
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}
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#else
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MOZ_IMPLICIT AutoSwap_PRUint16(uint16_t aValue)
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{
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value = mozilla::NativeEndian::swapToBigEndian(aValue);
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}
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#endif
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operator uint16_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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operator uint32_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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operator uint64_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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private:
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uint16_t value;
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};
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struct AutoSwap_PRInt16 {
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#ifdef __SUNPRO_CC
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AutoSwap_PRInt16& operator = (const int16_t aValue)
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{
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this->value = mozilla::NativeEndian::swapToBigEndian(aValue);
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return *this;
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}
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#else
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MOZ_IMPLICIT AutoSwap_PRInt16(int16_t aValue)
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{
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value = mozilla::NativeEndian::swapToBigEndian(aValue);
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}
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#endif
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operator int16_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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operator uint32_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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private:
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int16_t value;
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};
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struct AutoSwap_PRUint32 {
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#ifdef __SUNPRO_CC
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AutoSwap_PRUint32& operator = (const uint32_t aValue)
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{
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this->value = mozilla::NativeEndian::swapToBigEndian(aValue);
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return *this;
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}
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#else
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MOZ_IMPLICIT AutoSwap_PRUint32(uint32_t aValue)
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{
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value = mozilla::NativeEndian::swapToBigEndian(aValue);
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}
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#endif
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operator uint32_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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private:
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uint32_t value;
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};
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struct AutoSwap_PRInt32 {
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#ifdef __SUNPRO_CC
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AutoSwap_PRInt32& operator = (const int32_t aValue)
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{
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this->value = mozilla::NativeEndian::swapToBigEndian(aValue);
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return *this;
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}
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#else
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MOZ_IMPLICIT AutoSwap_PRInt32(int32_t aValue)
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{
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value = mozilla::NativeEndian::swapToBigEndian(aValue);
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}
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#endif
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operator int32_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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private:
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int32_t value;
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};
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struct AutoSwap_PRUint64 {
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#ifdef __SUNPRO_CC
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AutoSwap_PRUint64& operator = (const uint64_t aValue)
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{
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this->value = mozilla::NativeEndian::swapToBigEndian(aValue);
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return *this;
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}
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#else
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MOZ_IMPLICIT AutoSwap_PRUint64(uint64_t aValue)
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{
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value = mozilla::NativeEndian::swapToBigEndian(aValue);
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}
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#endif
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operator uint64_t() const
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{
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return mozilla::NativeEndian::swapFromBigEndian(value);
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}
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private:
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uint64_t value;
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};
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struct AutoSwap_PRUint24 {
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operator uint32_t() const { return value[0] << 16 | value[1] << 8 | value[2]; }
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private:
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AutoSwap_PRUint24() { }
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uint8_t value[3];
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};
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struct SFNTHeader {
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AutoSwap_PRUint32 sfntVersion; // Fixed, 0x00010000 for version 1.0.
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AutoSwap_PRUint16 numTables; // Number of tables.
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AutoSwap_PRUint16 searchRange; // (Maximum power of 2 <= numTables) x 16.
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AutoSwap_PRUint16 entrySelector; // Log2(maximum power of 2 <= numTables).
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|
AutoSwap_PRUint16 rangeShift; // NumTables x 16-searchRange.
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|
};
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struct TableDirEntry {
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|
AutoSwap_PRUint32 tag; // 4 -byte identifier.
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|
AutoSwap_PRUint32 checkSum; // CheckSum for this table.
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|
AutoSwap_PRUint32 offset; // Offset from beginning of TrueType font file.
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AutoSwap_PRUint32 length; // Length of this table.
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|
};
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struct HeadTable {
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enum {
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HEAD_VERSION = 0x00010000,
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HEAD_MAGIC_NUMBER = 0x5F0F3CF5,
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HEAD_CHECKSUM_CALC_CONST = 0xB1B0AFBA
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};
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AutoSwap_PRUint32 tableVersionNumber; // Fixed, 0x00010000 for version 1.0.
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AutoSwap_PRUint32 fontRevision; // Set by font manufacturer.
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AutoSwap_PRUint32 checkSumAdjustment; // To compute: set it to 0, sum the entire font as ULONG, then store 0xB1B0AFBA - sum.
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AutoSwap_PRUint32 magicNumber; // Set to 0x5F0F3CF5.
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AutoSwap_PRUint16 flags;
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|
AutoSwap_PRUint16 unitsPerEm; // Valid range is from 16 to 16384. This value should be a power of 2 for fonts that have TrueType outlines.
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|
AutoSwap_PRUint64 created; // Number of seconds since 12:00 midnight, January 1, 1904. 64-bit integer
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|
AutoSwap_PRUint64 modified; // Number of seconds since 12:00 midnight, January 1, 1904. 64-bit integer
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AutoSwap_PRInt16 xMin; // For all glyph bounding boxes.
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AutoSwap_PRInt16 yMin; // For all glyph bounding boxes.
|
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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);
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|
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<const uint8_t*>(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<uint8_t[]>& 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
|
|
// <char + var-selector> 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);
|
|
|
|
// 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<uint8_t> *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<nsString>& 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<nsString>& aFontList);
|
|
|
|
// for a given font list pref name, append list of font names
|
|
static void AppendPrefsFontList(const char *aPrefName,
|
|
nsTArray<nsString>& aFontList);
|
|
|
|
// for a given font list pref name, initialize a list of font names
|
|
static void GetPrefsFontList(const char *aPrefName,
|
|
nsTArray<nsString>& 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,
|
|
nsTArray<uint16_t> &aGlyphs,
|
|
nsTArray<mozilla::gfx::Color> &aColors);
|
|
|
|
protected:
|
|
friend struct MacCharsetMappingComparator;
|
|
|
|
static nsresult
|
|
ReadNames(const char *aNameData, uint32_t aDataLen, uint32_t aNameID,
|
|
int32_t aLangID, int32_t aPlatformID, nsTArray<nsString>& 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 */
|