@animech-public/playcanvas/build/playcanvas.dbg/src/extras/render-passes/render-pass-upsample.js

PlayCanvas WebGL game engine

import { RenderPassShaderQuad } from '../../scene/graphics/render-pass-shader-quad.js';

/**
 * @category Graphics
 */
class RenderPassUpsample extends RenderPassShaderQuad {
  constructor(device, sourceTexture) {
    super(device);
    this.sourceTexture = sourceTexture;
    this.shader = this.createQuadShader('UpSampleShader', /* glsl */`

            uniform sampler2D sourceTexture;
            uniform vec2 sourceInvResolution;
            varying vec2 uv0;

            void main()
            {
                float x = sourceInvResolution.x;
                float y = sourceInvResolution.y;

                vec3 a = texture2D (sourceTexture, vec2 (uv0.x - x, uv0.y + y)).rgb;
                vec3 b = texture2D (sourceTexture, vec2 (uv0.x,     uv0.y + y)).rgb;
                vec3 c = texture2D (sourceTexture, vec2 (uv0.x + x, uv0.y + y)).rgb;

                vec3 d = texture2D (sourceTexture, vec2 (uv0.x - x, uv0.y)).rgb;
                vec3 e = texture2D (sourceTexture, vec2 (uv0.x,     uv0.y)).rgb;
                vec3 f = texture2D (sourceTexture, vec2 (uv0.x + x, uv0.y)).rgb;

                vec3 g = texture2D (sourceTexture, vec2 (uv0.x - x, uv0.y - y)).rgb;
                vec3 h = texture2D (sourceTexture, vec2 (uv0.x,     uv0.y - y)).rgb;
                vec3 i = texture2D (sourceTexture, vec2 (uv0.x + x, uv0.y - y)).rgb;

                vec3 value = e * 4.0;
                value += (b + d + f + h) * 2.0;
                value += (a + c + g + i);
                value *= 1.0 / 16.0;

                gl_FragColor = vec4(value, 1.0);
            }`);
    this.sourceTextureId = device.scope.resolve('sourceTexture');
    this.sourceInvResolutionId = device.scope.resolve('sourceInvResolution');
    this.sourceInvResolutionValue = new Float32Array(2);
  }
  execute() {
    this.sourceTextureId.setValue(this.sourceTexture);
    this.sourceInvResolutionValue[0] = 1.0 / this.sourceTexture.width;
    this.sourceInvResolutionValue[1] = 1.0 / this.sourceTexture.height;
    this.sourceInvResolutionId.setValue(this.sourceInvResolutionValue);
    super.execute();
  }
}

export { RenderPassUpsample };