this.bind();
};
- function createOpenTypeHeader(aFile, aOffsets, aNumTables) {
- // sfnt version (4 bytes)
- var version = [0x4F, 0x54, 0x54, 0X4F];
-
- // numTables (2 bytes)
- var numTables = aNumTables;
-
- // searchRange (2 bytes)
- var tablesMaxPower2 = FontsUtils.getMaxPower2(numTables);
- var searchRange = tablesMaxPower2 * 16;
-
- // entrySelector (2 bytes)
- var entrySelector = Math.log(tablesMaxPower2) / Math.log(2);
-
- // rangeShift (2 bytes)
- var rangeShift = numTables * 16 - searchRange;
-
- var header = [].concat(version,
- FontsUtils.integerToBytes(numTables, 2),
- FontsUtils.integerToBytes(searchRange, 2),
- FontsUtils.integerToBytes(entrySelector, 2),
- FontsUtils.integerToBytes(rangeShift, 2));
- aFile.set(header, aOffsets.currentOffset);
- aOffsets.currentOffset += header.length;
- aOffsets.virtualOffset += header.length;
- }
-
- function createTableEntry(aFile, aOffsets, aTag, aData) {
- // tag
- var tag = [
- aTag.charCodeAt(0),
- aTag.charCodeAt(1),
- aTag.charCodeAt(2),
- aTag.charCodeAt(3)
- ];
-
- // offset
- var offset = aOffsets.virtualOffset;
-
- // Per spec tables must be 4-bytes align so add some 0x00 if needed
- while (aData.length & 3)
- aData.push(0x00);
-
- // length
- var length = aData.length;
-
- // checksum
- var checksum = FontsUtils.bytesToInteger(tag) + offset + length;
-
- var tableEntry = [].concat(tag,
- FontsUtils.integerToBytes(checksum, 4),
- FontsUtils.integerToBytes(offset, 4),
- FontsUtils.integerToBytes(length, 4));
- aFile.set(tableEntry, aOffsets.currentOffset);
- aOffsets.currentOffset += tableEntry.length;
- aOffsets.virtualOffset += aData.length;
- }
-
/**
* A bunch of the OpenType code is duplicate between this class and the
* TrueType code, this is intentional and will merge in a future version
cover: function font_cover(aFont, aProperties) {
var otf = new Uint8Array(kMaxFontFileSize);
+ function createOpenTypeHeader(aFile, aOffsets, aNumTables) {
+ // sfnt version (4 bytes)
+ var version = [0x4F, 0x54, 0x54, 0X4F];
+
+ // numTables (2 bytes)
+ var numTables = aNumTables;
+
+ // searchRange (2 bytes)
+ var tablesMaxPower2 = FontsUtils.getMaxPower2(numTables);
+ var searchRange = tablesMaxPower2 * 16;
+
+ // entrySelector (2 bytes)
+ var entrySelector = Math.log(tablesMaxPower2) / Math.log(2);
+
+ // rangeShift (2 bytes)
+ var rangeShift = numTables * 16 - searchRange;
+
+ var header = [].concat(version,
+ FontsUtils.integerToBytes(numTables, 2),
+ FontsUtils.integerToBytes(searchRange, 2),
+ FontsUtils.integerToBytes(entrySelector, 2),
+ FontsUtils.integerToBytes(rangeShift, 2));
+ aFile.set(header, aOffsets.currentOffset);
+ aOffsets.currentOffset += header.length;
+ aOffsets.virtualOffset += header.length;
+ }
+
+ function createTableEntry(aFile, aOffsets, aTag, aData) {
+ // tag
+ var tag = [
+ aTag.charCodeAt(0),
+ aTag.charCodeAt(1),
+ aTag.charCodeAt(2),
+ aTag.charCodeAt(3)
+ ];
+
+ // offset
+ var offset = aOffsets.virtualOffset;
+
+ // Per spec tables must be 4-bytes align so add some 0x00 if needed
+ while (aData.length & 3)
+ aData.push(0x00);
+
+ // length
+ var length = aData.length;
+
+ // checksum
+ var checksum = FontsUtils.bytesToInteger(tag) + offset + length;
+
+ var tableEntry = [].concat(tag,
+ FontsUtils.integerToBytes(checksum, 4),
+ FontsUtils.integerToBytes(offset, 4),
+ FontsUtils.integerToBytes(length, 4));
+ aFile.set(tableEntry, aOffsets.currentOffset);
+ aOffsets.currentOffset += tableEntry.length;
+ aOffsets.virtualOffset += aData.length;
+ }
+
// Required Tables
var CFF = aFont.data, // PostScript Font Program
OS2 = [], // OS/2 and Windows Specific metrics