Sakurai/pdf.js
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Mark all 'Adobe' images with 'EMBED'

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notmasteryet 2011-09-29 21:38:34 -05:00
parent bbf37ef1f1
commit ca651eca4d
1 changed files with 6 additions and 6 deletions
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pdf.js
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@ -904,16 +904,16 @@ var PredictorStream = (function predictorStream() {
// A JpegStream can't be read directly. We use the platform to render // A JpegStream can't be read directly. We use the platform to render
// the underlying JPEG data for us. // the underlying JPEG data for us.
var JpegStream = (function jpegStream() { var JpegStream = (function jpegStream() {
function isYcckImage(bytes) { function isAdobeImage(bytes) {
var maxBytesScanned = Math.max(bytes.length - 16, 1024); var maxBytesScanned = Math.max(bytes.length - 16, 1024);
// Looking for APP14, 'Adobe' and transform = 2 // Looking for APP14, 'Adobe'
for (var i = 0; i < maxBytesScanned; ++i) { for (var i = 0; i < maxBytesScanned; ++i) {
if (bytes[i] == 0xFF && bytes[i + 1] == 0xEE && if (bytes[i] == 0xFF && bytes[i + 1] == 0xEE &&
bytes[i + 2] == 0x00 && bytes[i + 3] == 0x0E && bytes[i + 2] == 0x00 && bytes[i + 3] == 0x0E &&
bytes[i + 4] == 0x41 && bytes[i + 5] == 0x64 && bytes[i + 4] == 0x41 && bytes[i + 5] == 0x64 &&
bytes[i + 6] == 0x6F && bytes[i + 7] == 0x62 && bytes[i + 6] == 0x6F && bytes[i + 7] == 0x62 &&
bytes[i + 8] == 0x65 && bytes[i + 9] == 0x00) bytes[i + 8] == 0x65 && bytes[i + 9] == 0x00)
return bytes[i + 15] == 0x02; return true;
// scanning until frame tag // scanning until frame tag
if (bytes[i] == 0xFF && bytes[i + 1] == 0xC0) if (bytes[i] == 0xFF && bytes[i + 1] == 0xC0)
break; break;
@ -921,7 +921,7 @@ var JpegStream = (function jpegStream() {
return false; return false;
} }
function fixYcckImage(bytes) { function fixAdobeImage(bytes) {
// Inserting 'EMBED' marker after JPEG signature // Inserting 'EMBED' marker after JPEG signature
var embedMarker = new Uint8Array([0xFF, 0xEC, 0, 8, 0x45, 0x4D, 0x42, 0x45, var embedMarker = new Uint8Array([0xFF, 0xEC, 0, 8, 0x45, 0x4D, 0x42, 0x45,
0x44, 0]); 0x44, 0]);
@ -939,8 +939,8 @@ var JpegStream = (function jpegStream() {
// need to be removed // need to be removed
this.dict = dict; this.dict = dict;
if (isYcckImage(bytes)) if (isAdobeImage(bytes))
bytes = fixYcckImage(bytes); bytes = fixAdobeImage(bytes);
// create DOM image // create DOM image
var img = new Image(); var img = new Image();