A browser-based image editor with WebGL filters

npm install webgl-media-editor

<div>
  <!-- after importing the library, these <media-editor-*> custom elements will be defined -->

  <!-- show a preview of the fist image being edited -->
  <media-editor-preview sourceIndex="0"></media-editor-preview>
  <!-- show a menu of filters to apply to the first image -->
  <media-editor-filter-menu sourceIndex="0"></media-editor-filter-menu>

  <media-editor-preview sourceIndex="1"></media-editor-preview>
  <media-editor-filter-menu sourceIndex="1"></media-editor-filter-menu>

  <button id="export" type="buton">Export</button>
</div>

import { MediaEditor } from 'webgl-media-editor'

const editor = new MediaEditor()

// after creating the editor, give it to the <media-editor-*> elements
const mediaEditorElements = document.querySelectorAll('media-editor-preview, media-editor-filter-menu')
for (const element of mediaEditorElements) {
  element.editor = editor
}

// the editor manages a gallery of images, give it an array of sources to edit
editor.setSources(['photo-0.jpg', 'photo-1.jpg'])

// you can edit programatically
editor.setEditState(
  // the index of the source image to edit
  0,
  {
    // index of effect. -1 to apply no effect
    effect: 2,
    // the intensity of the effect from 0 to 1
    intensity: 0.75,
    // optional adjustments to apply. adjustment values go from -1 to 1
    adjustments: { brightness: 0, contrast: 0.25, saturation: 0.3 },
    // optional crop
    crop: { x: 10, y: 10, width: 200, height: 200, rotate: 90 },
  },
)

document.getElementById('export').addEventListener('click', async () => {
  const image0 = await editor.toBlob(0)
  const image1 = await editor.toBlob(1)

  window.open(URL.createObjectURL(image0))
  window.open(URL.createObjectURL(image1))
})