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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkEndian.h"
#include "SkSfntUtils.h"
static uint16_t parse_be16(const uint8_t*& p) {
uint16_t value = (p[0] << 8) | p[1];
p += 2;
return value;
}
static uint32_t parse_be32(const uint8_t*& p) {
uint32_t value = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
p += 4;
return value;
}
static Sk64 parse_be64(const uint8_t*& p) {
Sk64 value;
value.fHi = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
value.fLo = (p[4] << 24) | (p[5] << 16) | (p[6] << 8) | p[7];
p += 8;
return value;
}
///////////////////////////////////////////////////////////////////////////////
bool SkSfntUtils::ReadTable_head(SkFontID fontID, SkSfntTable_head* head) {
static const uint32_t gTag = SkSetFourByteTag('h', 'e', 'a', 'd');
static const size_t gSize = 54;
uint8_t storage[gSize];
size_t size = SkFontHost::GetTableData(fontID, gTag, 0, gSize, storage);
if (size != gSize) {
return false;
}
const uint8_t* p = storage;
head->fVersion = parse_be32(p);
head->fRevision = parse_be32(p);
head->fCheckSumAdjustment = parse_be32(p);
head->fMagicNumber = parse_be32(p);
head->fFlags = parse_be16(p);
head->fUnitsPerEm = parse_be16(p);
head->fDateCreated = parse_be64(p);
head->fDateModified = parse_be64(p);
head->fXMin = parse_be16(p);
head->fXMin = parse_be16(p);
head->fXMin = parse_be16(p);
head->fXMin = parse_be16(p);
head->fMacStyle = parse_be16(p);
head->fLowestPPEM = parse_be16(p);
head->fFontDirectionHint = parse_be16(p);
head->fIndexToLocFormat = parse_be16(p);
head->fGlyphDataFormat = parse_be16(p);
SkASSERT(p - storage == (long)size);
return true;
}
bool SkSfntUtils::ReadTable_maxp(SkFontID fontID, SkSfntTable_maxp* maxp) {
static const uint32_t gTag = SkSetFourByteTag('m', 'a', 'x', 'p');
static const size_t gSize = 32;
uint8_t storage[gSize];
size_t size = SkFontHost::GetTableData(fontID, gTag, 0, gSize, storage);
if (size != gSize) {
return false;
}
const uint8_t* p = storage;
maxp->fVersion = parse_be32(p);
maxp->fNumGlyphs = parse_be16(p);
maxp->fMaxPoints = parse_be16(p);
maxp->fMaxContours = parse_be16(p);
maxp->fMaxComponentPoints = parse_be16(p);
maxp->fMaxComponentContours = parse_be16(p);
maxp->fMaxZones = parse_be16(p);
maxp->fMaxTwilightPoints = parse_be16(p);
maxp->fMaxStorage = parse_be16(p);
maxp->fMaxFunctionDefs = parse_be16(p);
maxp->fMaxInstructionDefs = parse_be16(p);
maxp->fMaxStackElements = parse_be16(p);
maxp->fMaxSizeOfInstructions = parse_be16(p);
maxp->fMaxComponentElements = parse_be16(p);
maxp->fMaxComponentDepth = parse_be16(p);
SkASSERT(p - storage == (long)size);
return true;
}
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