GeezerVison is showing github.com — DWriteShapePy/src/cpp/PostTable.cpp at main · microsoft/DWriteShapePy

Expand file tree

PostTable.cpp

Copy path

More file actions

Latest commit

History

78 lines (62 loc) · 1.7 KB

PostTable.cpp

Copy path

File metadata and controls

78 lines (62 loc) · 1.7 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

// 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;

}