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First stage of trying to support smasks on native jpegs.

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This commit is contained in:
Brendan Dahl 2011-12-07 15:36:27 -08:00
parent c615342962
commit 2a632d4ab2
6 changed files with 109 additions and 48 deletions
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35
src/core.js
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@ -6,7 +6,7 @@
var globalScope = (typeof window === 'undefined') ? this : window;
var ERRORS = 0, WARNINGS = 1, TODOS = 5;
var verbosity = WARNINGS;
var verbosity = TODOS;
// The global PDFJS object exposes the API
// In production, it will be declared outside a global wrapper
@ -14,7 +14,7 @@ var verbosity = WARNINGS;
if (!globalScope.PDFJS) {
globalScope.PDFJS = {};
}
PDFJS.disableWorker = true;
// getPdf()
// Convenience function to perform binary Ajax GET
// Usage: getPdf('http://...', callback)
@ -440,6 +440,7 @@ var PDFDocModel = (function pdfDoc() {
this.startXRef,
this.mainXRefEntriesOffset);
this.catalog = new Catalog(this.xref);
this.objs = new PDFObjects();
},
get numPages() {
var linearization = this.linearization;
@ -559,9 +560,9 @@ var PDFDoc = (function pdfDoc() {
var type = data[1];
switch (type) {
case 'JpegStream':
var IR = data[2];
new JpegImageLoader(id, IR, this.objs);
case 'Jpeg':
var imageData = data[2];
this.objs.resolve(id, imageData);
break;
case 'Font':
var name = data[2];
@ -607,6 +608,30 @@ var PDFDoc = (function pdfDoc() {
throw data.error;
}, this);
messageHandler.on('jpeg_decode', function(message) {
var imageData = message.data[0];
var img = new Image();
img.onload = (function jpegImageLoaderOnload() {
var width = img.width;
var height = img.height;
var length = width * height * 4;
var buf = new Uint8Array(length);
var tempCanvas = new ScratchCanvas(width, height);
var tempCtx = tempCanvas.getContext('2d');
tempCtx.drawImage(img, 0, 0);
var data = tempCtx.getImageData(0, 0, width, height).data;
for (var i = 0; i < length; i += 4) {
buf[i] = data[i];
buf[i + 1] = data[i + 1];
buf[i + 2] = data[i + 2];
buf[i + 3] = data[i + 3];
}
message.resolve({ data: buf, width: width, height: height});
}).bind(this);
var src = 'data:image/jpeg;base64,' + window.btoa(imageData);
img.src = src;
});
setTimeout(function pdfDocFontReadySetTimeout() {
messageHandler.send('doc', this.data);
this.workerReadyPromise.resolve(true);