David Miller (@morphio)

Close an ImageBitmap when its drawing work is finished

Close an ImageBitmap after the work that needs it has finished. Tie that cleanup to the bitmap's owner and account for drawing failures as well as success. For a bitmap used only for one canvas draw,

1d ago · 1 min readmorphio-images.hashnode.dev

Handle image decode rejection before replacing the preview

Put the preview replacement after a successful await of image.decode(). Keep a catch branch for decoding failure so the page does not report success for an unusable image. A small sequence is: create

2d ago · 1 min readmorphio-images.hashnode.dev

Check the encoded type before naming a canvas export

Choose a canvas export's filename after checking the produced format. toBlob() exports PNG when the requested type is unsupported; naming only from the request can give that output the wrong extension

2d ago · 1 min readmorphio-images.hashnode.dev

Ignore an older image job when a newer one owns the result panel

Check which image job owns the result panel before updating it. If the panel follows the latest started job, an earlier job must not overwrite it when it finishes later. Capture a sequence value at jo

4d ago · 1 min readmorphio-images.hashnode.dev

Snapshot the file selection before starting a batch

Accept a file selection into its own array before starting image-batch work. The input exposes a FileList; the array gives later work a list belonging to the accepted batch. function takeSelection(inp

4d ago · 1 min readmorphio-images.hashnode.dev

David Miller

About

Available for

David Miller's blogs

Close an ImageBitmap when its drawing work is finished

Handle image decode rejection before replacing the preview

Check the encoded type before naming a canvas export

Ignore an older image job when a newer one owns the result panel

Snapshot the file selection before starting a batch

David Miller

About

Available for

David Miller's blogs

Close an ImageBitmap when its drawing work is finished

Handle image decode rejection before replacing the preview

Check the encoded type before naming a canvas export

Ignore an older image job when a newer one owns the result panel

Snapshot the file selection before starting a batch

David Miller

About

Available for

David Miller's blogs

Close an ImageBitmap when its drawing work is finished

Handle image decode rejection before replacing the preview

Check the encoded type before naming a canvas export

Ignore an older image job when a newer one owns the result panel

Snapshot the file selection before starting a batch

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David Miller

About

Available for

David Miller's blogs

Close an ImageBitmap when its drawing work is finished

Handle image decode rejection before replacing the preview

Check the encoded type before naming a canvas export

Ignore an older image job when a newer one owns the result panel

Snapshot the file selection before starting a batch