[Webkit-unassigned] [Bug 182424] Complete ImageBitmap implementation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=182424

MrMartian <oconnorct1 at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |oconnorct1 at gmail.com

--- Comment #4 from MrMartian <oconnorct1 at gmail.com> ---
The image is still getting mutated a little when createImageBitmap is used in Safari. I store data in an RGBA encoded image, so any changes causes errors. It seems like the default setting is not entirely "premultiply", nor is it "none". For now, if browser detects it's safari, I have to use a polyfill to avoid image manipulation:

if (!('createImageBitmap' in window) || isSafari) {
  window.createImageBitmap = async function (blob) {
    return new Promise((resolve, reject) => {
      const img = document.createElement('img')
      img.addEventListener('load', function () { resolve(this) })
      img.src = URL.createObjectURL(blob)
      img.deleteURL = function () { URL.revokeObjectURL(this.src) }
    })
  }
}

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