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w3c / mediacapture-worker

MediaStream with worker
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The ImageBitmap::FindOptimalFormat() should not return empty string #42

Open kakukogou opened 8 years ago

kakukogou commented 8 years ago

@rocallahan suggested that the ImageBitmap::FindOptimalFormat() should not return an empty string. It should always be convertible between any format except to/from DEPTH and we could throw while converting to/from the DEPTH format.

anssiko commented 8 years ago

LGTM.

DEPTH to GRAY8 conversion should be possible. Converting DEPTH to/from other formats probably does not make sense, and throwing in such cases makes sense.

We use the following DEPTH to GRAY8 conversion in https://w3c.github.io/mediacapture-depth/#dfn-convert-the-depth-map-value-to-grayscale to retrofit depth to canvas-based workflow that is limited to 8 bits per pixel. The mediacapture-worker spec would enable processing of 16-bit depth values per pixel for more advanced use cases as noted in https://w3c.github.io/mediacapture-depth/#introduction

/cc @huningxin