kepler.gl.geoiq/src/utils/gl-utils.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

// Copyright (c) 2023 Uber Technologies, Inc.
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import {registerShaderModules, setParameters} from 'luma.gl';
import brushingModule from 'shaderlib/brushing-module';
import {LAYER_BLENDINGS} from 'constants/default-settings';
import GL from '@luma.gl/constants';

const getGlConst = d => GL[d];

export function onWebGLInitialized(gl) {
  registerShaderModules([brushingModule], {ignoreMultipleRegistrations: true});
}

export function setLayerBlending(gl, layerBlending) {
  const blending = LAYER_BLENDINGS[layerBlending];
  const {blendFunc, blendEquation} = blending;

  setParameters(gl, {
    [GL.BLEND]: true,
    ...(blendFunc ? {
      blendFunc: blendFunc.map(getGlConst),
      blendEquation: Array.isArray(blendEquation) ? blendEquation.map(getGlConst) : getGlConst(blendEquation)
    } : {})
  });
};