Uint8Array with raw RGBA bitmap (don't confuse with Supplementary method, not recommended for direct use. Promise interface & polyfill for old browsers.resizeBuffer(options) -> Promise How to use multiple cores (if browser allows).toBlob(canvas, mimeType ) -> PromiseĬonvenience method, similar to canvas.toBlob(), but with Sequentially to optimize CPU & memory use. (!) If you need to process multiple images, do it Result is Promise, resolved with to on success. Operation will be terminated on rejection. If it is less than 0.5, Unsharp Mask is off. mks2013 does both resize and sharpening, it's optimal and not recommended to change. ![]() filter - filter name (Default - mks2013).to - destination canvas, its size is supposed to be non-zero.from - source, can be Canvas, Image or ImageBitmap.Taken from source and destination objects. ![]() Resize image from one canvas (or image) to another. Without cib will be predictable and good. Result with enabled cib will depend on your browser. It's resize feature is blocked by default pica config.createImageBitmap() is used for non-blocking image decode (when available,.This feature is supported ( cib) but disabled by default and not recommended Important! Latest browsers may support resize via createImageBitmap. Function signature: createCanvas(width: number, height: number): Canvas Instead (to run pica in a Service Worker). createCanvas - function which returns a new canvas, used internallyīut this function could return an OffscreenCanvas.concurrency - max webworkers pool size.This option allow reuse webworkers effectively. Note, cib is buggy in Chrome and not supports default log ( 'resized to canvas & created blob!' ) ) API new Pica(config)Ĭreate resizer instance with given config (optional): toBlob ( result, 'image/jpeg', 0.90 ) ). log ( 'resize done!' ) ) // Resize & convert to blob pica. But we don't recommend this libraryįor resizing professional quality images.Ĭonst pica = require ( 'pica' ) ( ) // Resize from Canvas/Image to another Canvas pica. Precision loss will not be noticeable for ordinary images like.That causes some quality loss,īecause with gamma correction precision could be 12 bits per JS canvas does not support access to info about gamma correction.īitmaps have 8 bits per channel.For jpeg source, it's a good idea to keep exif data.Use pica.toBlob(), it includes required shim. Some ancient browsers do not support canvas.toBlob() method. ![]()
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