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Guessing pdf char size based on the CMap numbers

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This commit is contained in:
Yury Delendik 2012-04-23 17:44:51 -05:00
parent 8b7cd47798
commit 78213e826e
2 changed files with 10 additions and 3 deletions
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10
src/evaluator.js
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@ -481,7 +481,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
var toUnicode = dict.get('ToUnicode') || var toUnicode = dict.get('ToUnicode') ||
baseDict.get('ToUnicode'); baseDict.get('ToUnicode');
if (toUnicode) if (toUnicode)
properties.toUnicode = this.readToUnicode(toUnicode, xref); properties.toUnicode = this.readToUnicode(toUnicode, xref, properties);
if (properties.composite) { if (properties.composite) {
// CIDSystemInfo helps to match CID to glyphs // CIDSystemInfo helps to match CID to glyphs
@ -537,7 +537,8 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
properties.hasEncoding = hasEncoding; properties.hasEncoding = hasEncoding;
}, },
readToUnicode: function PartialEvaluator_readToUnicode(toUnicode, xref) { readToUnicode: function PartialEvaluator_readToUnicode(toUnicode, xref,
properties) {
var cmapObj = toUnicode; var cmapObj = toUnicode;
var charToUnicode = []; var charToUnicode = [];
if (isName(cmapObj)) { if (isName(cmapObj)) {
@ -626,6 +627,10 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
} }
} else if (octet == 0x3E) { } else if (octet == 0x3E) {
if (token.length) { if (token.length) {
// XXX guessing chars size by checking number size in the CMap
if (token.length <= 2 && properties.composite)
properties.wideChars = false;
if (token.length <= 4) { if (token.length <= 4) {
// parsing hex number // parsing hex number
tokens.push(parseInt(token, 16)); tokens.push(parseInt(token, 16));
@ -843,6 +848,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
length1: length1, length1: length1,
length2: length2, length2: length2,
composite: composite, composite: composite,
wideChars: composite,
fixedPitch: false, fixedPitch: false,
fontMatrix: dict.get('FontMatrix') || IDENTITY_MATRIX, fontMatrix: dict.get('FontMatrix') || IDENTITY_MATRIX,
firstChar: firstChar || 0, firstChar: firstChar || 0,

3
src/fonts.js
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@ -789,6 +789,7 @@ var Font = (function FontClosure() {
this.widths = properties.widths; this.widths = properties.widths;
this.defaultWidth = properties.defaultWidth; this.defaultWidth = properties.defaultWidth;
this.composite = properties.composite; this.composite = properties.composite;
this.wideChars = properties.wideChars;
this.hasEncoding = properties.hasEncoding; this.hasEncoding = properties.hasEncoding;
this.fontMatrix = properties.fontMatrix; this.fontMatrix = properties.fontMatrix;
@ -2520,7 +2521,7 @@ var Font = (function FontClosure() {
glyphs = []; glyphs = [];
if (this.composite) { if (this.wideChars) {
// composite fonts have multi-byte strings convert the string from // composite fonts have multi-byte strings convert the string from
// single-byte to multi-byte // single-byte to multi-byte
// XXX assuming CIDFonts are two-byte - later need to extract the // XXX assuming CIDFonts are two-byte - later need to extract the