mirror of
https://github.com/flynx/ImageGrid.git
synced 2025-11-04 05:10:07 +00:00
145 lines
3.4 KiB
JavaScript
Executable File
145 lines
3.4 KiB
JavaScript
Executable File
/**********************************************************************
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*
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*
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*
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**********************************************************************/
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((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
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(function(require){ var module={} // make module AMD/node compatible...
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/*********************************************************************/
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try{
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var sharp = requirejs('sharp')
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} catch(err){
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var sharp = null
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}
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if(typeof(process) != 'undefined'){
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var fse = requirejs('fs-extra')
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var pathlib = requirejs('path')
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var file = requirejs('imagegrid/file')
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}
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/*********************************************************************/
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if(typeof(process) != 'undefined'){
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var ensureDir = file.denodeify(fse.ensureDir)
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}
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/*********************************************************************/
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// images format:
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// [
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// {
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// source: <source>,
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// gid: <gid>,
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// },
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// ...
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// ]
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//
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// XXX add a callback call when a gid is done...
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var makePreviews =
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module.makePreviews =
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function(images, sizes, base_path, target_tpl, callback){
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var that = this
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var target_path = (target_tpl
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|| 'preview/${RESOLUTION}px/${NAME}.jpg')
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// iterate images...
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return Promise.all(images.map(function(data){
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var gid = data.gid || ''
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var source = data.source
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callback && callback(null, {
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status: 'queued',
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gid: gid,
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res: 'all',
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})
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var ext = pathlib.extname(source)
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var name = pathlib.basename(source)
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.replace(RegExp(ext + '$'), '')
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var target = target_path
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.replace(/\$NAME|\$\{NAME\}/g, name)
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.replace(/\$GID|\$\{GID\}/g, gid)
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var img = sharp(source)
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// get metadata....
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return img.metadata().then(function(metadata){
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var orig_res = Math.max(metadata.width, metadata.height)
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// process previews...
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return Promise
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.all(sizes
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.map(function(res){
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// skip if image is smaller than res...
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if(res >= orig_res){
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return
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}
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var rel = target
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.replace(/\$RESOLUTION|\$\{RESOLUTION\}/g, res)
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var full = pathlib.join(base_path || '', rel)
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callback && callback(null, {
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status: 'queued',
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gid: gid,
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res: res,
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path: rel
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})
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// make the dir...
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return ensureDir(pathlib.dirname(full))
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.then(function(){
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// check if image exists...
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if(fse.existsSync(full)){
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callback && callback(null, {
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status: 'skipped',
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gid: gid,
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res: res,
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path: rel,
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orientation: metadata.orientation,
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})
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return }
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// make the actual previews...
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return img.clone()
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.resize({
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width: res,
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height: res,
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fit: 'inside',
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})
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.withMetadata()
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.toFile(full)
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.then(function(){
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callback
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&& callback(null, {
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status: 'done',
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gid: gid,
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res: res,
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path: rel,
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orientation: metadata.orientation, }) })
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})
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}))
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// report a gid is done...
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.then(function(){
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callback
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&& callback(null, {
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status: 'done',
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gid: gid,
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res: 'all',
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}) }) })
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}))
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}
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/**********************************************************************
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* vim:set ts=4 sw=4 : */ return module })
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