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Uses blob URL instead of data when possible

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Yury Delendik 2013-11-11 22:25:03 -06:00 • committed by Yury
parent 4ce6cb8b0f
commit c8af2565f1
3 changed files with 34 additions and 8 deletions
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33
src/shared/util.js
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@ -14,7 +14,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals Cmd, ColorSpace, Dict, MozBlobBuilder, Name, PDFJS, Ref */
/* globals Cmd, ColorSpace, Dict, MozBlobBuilder, Name, PDFJS, Ref, URL */
'use strict';
@ -1100,6 +1100,33 @@ PDFJS.createBlob = function createBlob(data, contentType) {
return bb.getBlob(contentType);
};
PDFJS.createObjectURL = (function createObjectURLClosure() {
if (typeof URL !== 'undefined' && URL.createObjectURL) {
return function createObjectURL(data, contentType) {
var blob = PDFJS.createBlob(data, contentType);
return URL.createObjectURL(blob);
};
}
// Blob/createObjectURL is not available, falling back to data schema.
var digits =
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
return function createObjectURL(data, contentType) {
var buffer = 'data:' + contentType + ';base64,';
for (var i = 0, ii = data.length; i < ii; i += 3) {
var b1 = data[i] & 0xFF;
var b2 = data[i + 1] & 0xFF;
var b3 = data[i + 2] & 0xFF;
var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
var d4 = i + 2 < ii ? (b3 & 0x3F) : 64;
buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
}
return buffer;
};
})();
function MessageHandler(name, comObj) {
this.name = name;
this.comObj = comObj;
@ -1191,10 +1218,10 @@ MessageHandler.prototype = {
}
};
function loadJpegStream(id, imageData, objs) {
function loadJpegStream(id, imageUrl, objs) {
var img = new Image();
img.onload = (function loadJpegStream_onloadClosure() {
objs.resolve(id, img);
});
img.src = 'data:image/jpeg;base64,' + window.btoa(imageData);
img.src = imageUrl;
}