b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
53 lines
1.2 KiB
JavaScript
Executable file
53 lines
1.2 KiB
JavaScript
Executable file
define(function(require, exports, module) {
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'use strict';
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/**
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* Module Dependencies
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*/
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var parseJpegMetadata = require('jpegMetaDataParser');
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/**
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* Exports
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*/
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module.exports = function(blob, done) {
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parseJpegMetadata(blob, onJpegParsed);
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function onJpegParsed(metadata) {
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metadata.blob = blob;
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if (!metadata.preview) {
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done(metadata);
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return;
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}
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// If we found an EXIF preview,
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// and can determine its size, then
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// we can display it instead of the
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// big image and save memory and time.
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var start = metadata.preview.start;
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var end = metadata.preview.end;
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var previewBlob = blob.slice(start, end, 'image/jpeg');
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parseJpegMetadata(previewBlob, onSuccess, onError);
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// If we parsed the preview image, add its
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// dimensions to the metadata.preview
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// object, and then let the MediaFrame
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// object display the preview instead of
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// the full-size image.
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function onSuccess(previewMetadata) {
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metadata.preview.width = previewMetadata.width;
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metadata.preview.height = previewMetadata.height;
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done(metadata);
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}
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// If we couldn't parse the preview image,
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// just display full-size.
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function onError() {
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done(metadata);
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}
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}
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};
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});
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