playcanvas/build/playcanvas/src/extras/render-passes/render-pass-upsample.js

PlayCanvas WebGL game engine

import { SHADERLANGUAGE_GLSL, SHADERLANGUAGE_WGSL, SEMANTIC_POSITION } from '../../platform/graphics/constants.js';
import { RenderPassShaderQuad } from '../../scene/graphics/render-pass-shader-quad.js';
import { ShaderUtils } from '../../scene/shader-lib/shader-utils.js';
import glslUpsamplePS from '../../scene/shader-lib/glsl/chunks/render-pass/frag/upsample.js';
import wgslUpsamplePS from '../../scene/shader-lib/wgsl/chunks/render-pass/frag/upsample.js';
import { ShaderChunks } from '../../scene/shader-lib/shader-chunks.js';

class RenderPassUpsample extends RenderPassShaderQuad {
		constructor(device, sourceTexture){
				super(device);
				this.sourceTexture = sourceTexture;
				ShaderChunks.get(device, SHADERLANGUAGE_GLSL).set('upsamplePS', glslUpsamplePS);
				ShaderChunks.get(device, SHADERLANGUAGE_WGSL).set('upsamplePS', wgslUpsamplePS);
				this.shader = ShaderUtils.createShader(device, {
						uniqueName: 'UpSampleShader',
						attributes: {
								aPosition: SEMANTIC_POSITION
						},
						vertexChunk: 'quadVS',
						fragmentChunk: 'upsamplePS'
				});
				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 };