@luma.gl/effects/src/passes/postprocessing/image-warp-filters/warp.ts

Post-processing effects for luma.gl

// luma.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors

import type {ShaderPass} from '@luma.gl/shadertools';

const source = /* wgsl */ `\
vec4 warp_sampleColor(sampler2D source, vec2 texSize, vec2 coord) {
  vec4 color = texture(source, coord / texSize);
  vec2 clampedCoord = clamp(coord, vec2(0.0), texSize);
  if (coord != clampedCoord) {
    /* fade to transparent if we are outside the image */
    color.a *= max(0.0, 1.0 - length(coord - clampedCoord));
  }
  return color;
}
`;

const fs = /* glsl */ `\
vec4 warp_sampleColor(sampler2D source, vec2 texSize, vec2 coord) {
  vec4 color = texture(source, coord / texSize);
  vec2 clampedCoord = clamp(coord, vec2(0.0), texSize);
  if (coord != clampedCoord) {
    /* fade to transparent if we are outside the image */
    color.a *= max(0.0, 1.0 - length(coord - clampedCoord));
  }
  return color;
}
`;

export type WarpProps = {};

export type WarpUniforms = WarpProps;

export const warp = {
  name: 'warp',
  source,
  fs,

  passes: []
} as const satisfies ShaderPass<WarpProps, WarpProps>;