@deck.gl/core/dist/lib/attribute/gl-utils.js

deck.gl core library

// deck.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
import { getTypedArrayConstructor, getDataType } from '@luma.gl/core';
export function typedArrayFromDataType(type) {
    // Sorted in some order of likelihood to reduce amount of comparisons
    switch (type) {
        case 'float64':
            return Float64Array;
        case 'uint8':
        case 'unorm8':
            return Uint8ClampedArray;
        default:
            return getTypedArrayConstructor(type);
    }
}
export const dataTypeFromTypedArray = getDataType;
export function getBufferAttributeLayout(name, accessor, deviceType) {
    // TODO(ibgreen): WebGPU change. Currently we always use normalized 8 bit integers
    const type = deviceType === 'webgpu' && accessor.type === 'uint8' ? 'unorm8' : accessor.type;
    return {
        attribute: name,
        // @ts-expect-error Not all combinations are valid vertex formats; it's up to DataColumn to ensure
        format: accessor.size > 1 ? `${type}x${accessor.size}` : accessor.type,
        byteOffset: accessor.offset || 0
        // Note stride is set on the top level
    };
}
export function getStride(accessor) {
    return accessor.stride || accessor.size * accessor.bytesPerElement;
}
export function bufferLayoutEqual(accessor1, accessor2) {
    return (accessor1.type === accessor2.type &&
        accessor1.size === accessor2.size &&
        getStride(accessor1) === getStride(accessor2) &&
        (accessor1.offset || 0) === (accessor2.offset || 0));
}
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