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Fixing missing text (#886)

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notmasteryet 2011-12-06 22:13:14 -06:00
parent 9eae90a1ba
commit fe02078c9d
1 changed files with 14 additions and 7 deletions
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21
src/fonts.js
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@ -884,6 +884,13 @@ var Font = (function Font() {
String.fromCharCode(value & 0xff);
};
function safeString16(value) {
// clamp value to the 16-bit int range
value = value > 0x7FFF ? 0x7FFF : value < -0x8000 ? -0x8000 : value;
return String.fromCharCode((value >> 8) & 0xff) +
String.fromCharCode(value & 0xff);
};
function string32(value) {
return String.fromCharCode((value >> 24) & 0xff) +
String.fromCharCode((value >> 16) & 0xff) +
@ -1903,9 +1910,9 @@ var Font = (function Font() {
'\x00\x00\x00\x00\x9e\x0b\x7e\x27' + // creation date
'\x00\x00\x00\x00\x9e\x0b\x7e\x27' + // modifification date
'\x00\x00' + // xMin
string16(properties.descent) + // yMin
safeString16(properties.descent) + // yMin
'\x0F\xFF' + // xMax
string16(properties.ascent) + // yMax
safeString16(properties.ascent) + // yMax
string16(properties.italicAngle ? 2 : 0) + // macStyle
'\x00\x11' + // lowestRecPPEM
'\x00\x00' + // fontDirectionHint
@ -1917,15 +1924,15 @@ var Font = (function Font() {
'hhea': (function fontFieldsHhea() {
return stringToArray(
'\x00\x01\x00\x00' + // Version number
string16(properties.ascent) + // Typographic Ascent
string16(properties.descent) + // Typographic Descent
safeString16(properties.ascent) + // Typographic Ascent
safeString16(properties.descent) + // Typographic Descent
'\x00\x00' + // Line Gap
'\xFF\xFF' + // advanceWidthMax
'\x00\x00' + // minLeftSidebearing
'\x00\x00' + // minRightSidebearing
'\x00\x00' + // xMaxExtent
string16(properties.capHeight) + // caretSlopeRise
string16(Math.tan(properties.italicAngle) *
safeString16(properties.capHeight) + // caretSlopeRise
safeString16(Math.tan(properties.italicAngle) *
properties.xHeight) + // caretSlopeRun
'\x00\x00' + // caretOffset
'\x00\x00' + // -reserved-
@ -1942,7 +1949,7 @@ var Font = (function Font() {
for (var i = 0, ii = charstrings.length; i < ii; i++) {
var charstring = charstrings[i];
var width = 'width' in charstring ? charstring.width : 0;
hmtx += string16(width) + string16(0);
hmtx += safeString16(width) + string16(0);
}
return stringToArray(hmtx);
})(),