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Copy pathPostTable.cpp
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78 lines (62 loc) · 1.7 KB
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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
#include "pch.h"
typedef short FWord;
typedef unsigned short uFWord;
typedef short F2Dot14;
typedef long Fixed;
#define POSTSCRIPTNAMEINDICES_NUMBERGLYPHS 32
bool PostTable::Initialize()
{
// https://docs.microsoft.com/en-us/typography/opentype/spec/post
const char* data = static_cast<const char*>(postData_);
uint32_t offset = 0;
Fixed version = SWAPL(*data + offset);
if (version == 0x00020000)
{
if (POSTSCRIPTNAMEINDICES_NUMBERGLYPHS + sizeof(uint16_t) > postSize_)
return false;
offset += POSTSCRIPTNAMEINDICES_NUMBERGLYPHS;
numGlyphs_ = SWAPW(*(data + offset));
offset += sizeof(uint16_t); //numGlyphs
for (int index = 0; index < numGlyphs_; index++)
{
if (offset + sizeof(uint16_t) > postSize_)
return false;
uint16_t glyphNameIndex = SWAPW(*(data + offset));
glyphNameIndex_.push_back(glyphNameIndex);
offset += sizeof(uint16_t);
}
while (offset < postSize_ && offset + *(data + offset) < postSize_)
{
uint8_t size = *(data + offset);
offset += sizeof(uint8_t);
std::string str(data + offset, size);
glyphNames_.push_back(str);
offset += size;
}
havePostData_ = true;
}
return true;
}
std::string PostTable::GlyphToString(uint16_t glyphId)
{
std::string result = "gid" + std::to_string(glyphId);
if (havePostData_ && glyphId < numGlyphs_)
{
uint16_t glyphNameIndex = glyphNameIndex_[glyphId];
if (glyphNameIndex < 258)
{
result = macPostStrings[glyphNameIndex];
}
else
{
const uint16_t ordinal = glyphNameIndex - 258;
if (ordinal < glyphNames_.size())
{
result = glyphNames_[ordinal];
}
}
}
return result;
}