import defaultValue from "../../Core/defaultValue.js";
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import ShaderDestination from "../../Renderer/ShaderDestination.js";
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import AlphaMode from "../AlphaMode.js";
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import BlendingState from "../BlendingState.js";
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import Pass from "../../Renderer/Pass.js";
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/**
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* A pipeline stage for configuring the alpha options for handling translucency.
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*
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* @namespace MaterialPipelineStage
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*
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* @private
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*/
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var AlphaPipelineStage = {};
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AlphaPipelineStage.name = "AlphaPipelineStage"; // Helps with debugging
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AlphaPipelineStage.process = function (renderResources, primitive, frameState) {
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var alphaOptions = renderResources.alphaOptions;
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// Ensure the pass is defined
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var model = renderResources.model;
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alphaOptions.pass = defaultValue(alphaOptions.pass, model.opaquePass);
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var renderStateOptions = renderResources.renderStateOptions;
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if (alphaOptions.pass === Pass.TRANSLUCENT) {
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renderStateOptions.blending = BlendingState.ALPHA_BLEND;
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} else {
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renderStateOptions.blending = BlendingState.DISABLED;
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}
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var shaderBuilder = renderResources.shaderBuilder;
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var uniformMap = renderResources.uniformMap;
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var alphaMode = alphaOptions.alphaMode;
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if (alphaMode === AlphaMode.MASK) {
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shaderBuilder.addDefine(
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"ALPHA_MODE_MASK",
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undefined,
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ShaderDestination.FRAGMENT
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);
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shaderBuilder.addUniform(
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"float",
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"u_alphaCutoff",
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ShaderDestination.FRAGMENT
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);
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uniformMap.u_alphaCutoff = function () {
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return alphaOptions.alphaCutoff;
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};
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} else if (alphaMode === AlphaMode.BLEND) {
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shaderBuilder.addDefine(
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"ALPHA_MODE_BLEND",
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undefined,
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ShaderDestination.FRAGMENT
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);
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} else {
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shaderBuilder.addDefine(
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"ALPHA_MODE_OPAQUE",
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undefined,
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ShaderDestination.FRAGMENT
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);
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}
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};
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export default AlphaPipelineStage;
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