36 lines
1.2 KiB
JavaScript
36 lines
1.2 KiB
JavaScript
'use strict';
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var BindGroup = require('../../renderers/gpu/shader/BindGroup.js');
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var Texture = require('../../renderers/shared/texture/Texture.js');
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var maxRecommendedTextures = require('../gl/utils/maxRecommendedTextures.js');
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"use strict";
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const cachedGroups = {};
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function getTextureBatchBindGroup(textures, size) {
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let uid = 2166136261;
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for (let i = 0; i < size; i++) {
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uid ^= textures[i].uid;
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uid = Math.imul(uid, 16777619);
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uid >>>= 0;
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}
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return cachedGroups[uid] || generateTextureBatchBindGroup(textures, size, uid);
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}
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let maxTextures = 0;
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function generateTextureBatchBindGroup(textures, size, key) {
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const bindGroupResources = {};
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let bindIndex = 0;
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if (!maxTextures)
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maxTextures = maxRecommendedTextures.getMaxTexturesPerBatch();
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for (let i = 0; i < maxTextures; i++) {
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const texture = i < size ? textures[i] : Texture.Texture.EMPTY.source;
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bindGroupResources[bindIndex++] = texture.source;
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bindGroupResources[bindIndex++] = texture.style;
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}
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const bindGroup = new BindGroup.BindGroup(bindGroupResources);
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cachedGroups[key] = bindGroup;
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return bindGroup;
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}
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exports.getTextureBatchBindGroup = getTextureBatchBindGroup;
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//# sourceMappingURL=getTextureBatchBindGroup.js.map
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