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in preparation for using strings to write out font data, store constant blobs as strings

Andreas Gal 14 years ago
parent
c09ee48094
commit
a118f9035a
1 changed files with 96 additions and 99 deletions
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  1. 195
      fonts.js

195
fonts.js
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@ -333,30 +333,29 @@ var Font = (function () { @@ -333,30 +333,29 @@ var Font = (function () {
return a;
}
function s16(value) {
return String.fromCharCode(value >> 8) + String.fromCharCode(value & 0xff);
}
function createOpenTypeHeader(aFile, aOffsets, numTables) {
var header = "";
function WriteHeader16(value) {
header += String.fromCharCode(value >> 8);
header += String.fromCharCode(value & 0xff);
}
// sfnt version (4 bytes)
header += "\x4F\x54\x54\x4F";
// numTables (2 bytes)
WriteHeader16(numTables);
header += s16(numTables);
// searchRange (2 bytes)
var tablesMaxPower2 = FontsUtils.getMaxPower2(numTables);
var searchRange = tablesMaxPower2 * 16;
WriteHeader16(searchRange);
header += s16(searchRange);
// entrySelector (2 bytes)
WriteHeader16(Math.log(tablesMaxPower2) / Math.log(2));
header += s16(Math.log(tablesMaxPower2) / Math.log(2));
// rangeShift (2 bytes)
WriteHeader16(numTables * 16 - searchRange);
header += s16(numTables * 16 - searchRange);
aFile.set(s2a(header), aOffsets.currentOffset);
aOffsets.currentOffset += header.length;
@ -425,45 +424,45 @@ var Font = (function () { @@ -425,45 +424,45 @@ var Font = (function () {
createTableEntry(otf, offsets, "CFF ", CFF);
/** OS/2 */
OS2 = [
0x00, 0x03, // version
0x02, 0x24, // xAvgCharWidth
0x01, 0xF4, // usWeightClass
0x00, 0x05, // usWidthClass
0x00, 0x00, // fstype
0x02, 0x8A, // ySubscriptXSize
0x02, 0xBB, // ySubscriptYSize
0x00, 0x00, // ySubscriptXOffset
0x00, 0x8C, // ySubscriptYOffset
0x02, 0x8A, // ySuperScriptXSize
0x02, 0xBB, // ySuperScriptYSize
0x00, 0x00, // ySuperScriptXOffset
0x01, 0xDF, // ySuperScriptYOffset
0x00, 0x31, // yStrikeOutSize
0x01, 0x02, // yStrikeOutPosition
0x00, 0x00, // sFamilyClass
0x02, 0x00, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Panose
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 0-31)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 32-63)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 64-95)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 96-127)
0x2A, 0x32, 0x31, 0x2A, // achVendID
0x00, 0x20, // fsSelection
0x00, 0x2D, // usFirstCharIndex
0x00, 0x7A, // usLastCharIndex
0x00, 0x03, // sTypoAscender
0x00, 0x20, // sTypeDescender
0x00, 0x38, // sTypoLineGap
0x00, 0x5A, // usWinAscent
0x02, 0xB4, // usWinDescent
0x00, 0xCE, 0x00, 0x00, // ulCodePageRange1 (Bits 0-31)
0x00, 0x01, 0x00, 0x00, // ulCodePageRange2 (Bits 32-63)
0x00, 0x00, // sxHeight
0x00, 0x00, // sCapHeight
0x00, 0x01, // usDefaultChar
0x00, 0xCD, // usBreakChar
0x00, 0x02 // usMaxContext
];
OS2 = s2a(
"\x00\x03" + // version
"\x02\x24" + // xAvgCharWidth
"\x01\xF4" + // usWeightClass
"\x00\x05" + // usWidthClass
"\x00\x00" + // fstype
"\x02\x8A" + // ySubscriptXSize
"\x02\xBB" + // ySubscriptYSize
"\x00\x00" + // ySubscriptXOffset
"\x00\x8C" + // ySubscriptYOffset
"\x02\x8A" + // ySuperScriptXSize
"\x02\xBB" + // ySuperScriptYSize
"\x00\x00" + // ySuperScriptXOffset
"\x01\xDF" + // ySuperScriptYOffset
"\x00\x31" + // yStrikeOutSize
"\x01\x02" + // yStrikeOutPosition
"\x00\x00" + // sFamilyClass
"\x02\x00\x06\x03\x00\x00\x00\x00\x00\x00" + // Panose
"\xFF\xFF\xFF\xFF" + // ulUnicodeRange1 (Bits 0-31)
"\xFF\xFF\xFF\xFF" + // ulUnicodeRange1 (Bits 32-63)
"\xFF\xFF\xFF\xFF" + // ulUnicodeRange1 (Bits 64-95)
"\xFF\xFF\xFF\xFF" + // ulUnicodeRange1 (Bits 96-127)
"\x2A\x32\x31\x2A" + // achVendID
"\x00\x20" + // fsSelection
"\x00\x2D" + // usFirstCharIndex
"\x00\x7A" + // usLastCharIndex
"\x00\x03" + // sTypoAscender
"\x00\x20" + // sTypeDescender
"\x00\x38" + // sTypoLineGap
"\x00\x5A" + // usWinAscent
"\x02\xB4" + // usWinDescent
"\x00\xCE\x00\x00" + // ulCodePageRange1 (Bits 0-31)
"\x00\x01\x00\x00" + // ulCodePageRange2 (Bits 32-63)
"\x00\x00" + // sxHeight
"\x00\x00" + // sCapHeight
"\x00\x01" + // usDefaultChar
"\x00\xCD" + // usBreakChar
"\x00\x02" // usMaxContext
);
createTableEntry(otf, offsets, "OS/2", OS2);
//XXX Getting charstrings here seems wrong since this is another CFF glue
@ -474,49 +473,47 @@ var Font = (function () { @@ -474,49 +473,47 @@ var Font = (function () {
createTableEntry(otf, offsets, "cmap", cmap);
/** HEAD */
head = [
0x00, 0x01, 0x00, 0x00, // Version number
0x00, 0x00, 0x50, 0x00, // fontRevision
0x00, 0x00, 0x00, 0x00, // checksumAdjustement
0x5F, 0x0F, 0x3C, 0xF5, // magicNumber
0x00, 0x00, // Flags
0x03, 0xE8, // unitsPerEM (defaulting to 1000)
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // creation date
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // modifification date
0x00, 0x00, // xMin
0x00, 0x00, // yMin
0x00, 0x00, // xMax
0x00, 0x00, // yMax
0x00, 0x00, // macStyle
0x00, 0x00, // lowestRecPPEM
0x00, 0x00, // fontDirectionHint
0x00, 0x00, // indexToLocFormat
0x00, 0x00 // glyphDataFormat
];
head = s2a(
"\x00\x01\x00\x00" + // Version number
"\x00\x00\x50\x00" + // fontRevision
"\x00\x00\x00\x00" + // checksumAdjustement
"\x5F\x0F\x3C\xF5" + // magicNumber
"\x00\x00" + // Flags
"\x03\xE8" + // unitsPerEM (defaulting to 1000)
"\x00\x00\x00\x00\x00\x00\x00\x00" + // creation date
"\x00\x00\x00\x00\x00\x00\x00\x00" + // modifification date
"\x00\x00" + // xMin
"\x00\x00" + // yMin
"\x00\x00" + // xMax
"\x00\x00" + // yMax
"\x00\x00" + // macStyle
"\x00\x00" + // lowestRecPPEM
"\x00\x00" + // fontDirectionHint
"\x00\x00" + // indexToLocFormat
"\x00\x00" // glyphDataFormat
);
createTableEntry(otf, offsets, "head", head);
/** HHEA */
hhea = [].concat(
[
0x00, 0x01, 0x00, 0x00, // Version number
0x00, 0x00, // Typographic Ascent
0x00, 0x00, // Typographic Descent
0x00, 0x00, // Line Gap
0xFF, 0xFF, // advanceWidthMax
0x00, 0x00, // minLeftSidebearing
0x00, 0x00, // minRightSidebearing
0x00, 0x00, // xMaxExtent
0x00, 0x00, // caretSlopeRise
0x00, 0x00, // caretSlopeRun
0x00, 0x00, // caretOffset
0x00, 0x00, // -reserved-
0x00, 0x00, // -reserved-
0x00, 0x00, // -reserved-
0x00, 0x00, // -reserved-
0x00, 0x00 // metricDataFormat
],
FontsUtils.integerToBytes(charstrings.length, 2) // numberOfHMetrics
);
hhea = s2a(
"\x00\x01\x00\x00" + // Version number
"\x00\x00" + // Typographic Ascent
"\x00\x00" + // Typographic Descent
"\x00\x00" + // Line Gap
"\xFF\xFF" + // advanceWidthMax
"\x00\x00" + // minLeftSidebearing
"\x00\x00" + // minRightSidebearing
"\x00\x00" + // xMaxExtent
"\x00\x00" + // caretSlopeRise
"\x00\x00" + // caretSlopeRun
"\x00\x00" + // caretOffset
"\x00\x00" + // -reserved-
"\x00\x00" + // -reserved-
"\x00\x00" + // -reserved-
"\x00\x00" + // -reserved-
"\x00\x00" + // metricDataFormat
s16(charstrings.length)
);
createTableEntry(otf, offsets, "hhea", hhea);
/** HMTX */
@ -548,17 +545,17 @@ var Font = (function () { @@ -548,17 +545,17 @@ var Font = (function () {
/** POST */
// FIXME Get those informations from the FontInfo structure
post = [
0x00, 0x03, 0x00, 0x00, // Version number
0x00, 0x00, 0x01, 0x00, // italicAngle
0x00, 0x00, // underlinePosition
0x00, 0x00, // underlineThickness
0x00, 0x00, 0x00, 0x00, // isFixedPitch
0x00, 0x00, 0x00, 0x00, // minMemType42
0x00, 0x00, 0x00, 0x00, // maxMemType42
0x00, 0x00, 0x00, 0x00, // minMemType1
0x00, 0x00, 0x00, 0x00 // maxMemType1
];
post = s2a(
"\x00\x03\x00\x00" + // Version number
"\x00\x00\x01\x00" + // italicAngle
"\x00\x00" + // underlinePosition
"\x00\x00" + // underlineThickness
"\x00\x00\x00\x00" + // isFixedPitch
"\x00\x00\x00\x00" + // minMemType42
"\x00\x00\x00\x00" + // maxMemType42
"\x00\x00\x00\x00" + // minMemType1
"\x00\x00\x00\x00" // maxMemType1
);
createTableEntry(otf, offsets, "post", post);
// Once all the table entries header are written, dump the data!

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