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95 lines
3.1 KiB
JavaScript
95 lines
3.1 KiB
JavaScript
import WebGLConstants from "../Core/WebGLConstants.js";
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/**
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* Enumerates all possible filters used when minifying WebGL textures.
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*
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* @enum {Number}
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*
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* @see TextureMagnificationFilter
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*/
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var TextureMinificationFilter = {
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/**
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* Samples the texture by returning the closest pixel.
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*
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* @type {Number}
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* @constant
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*/
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NEAREST: WebGLConstants.NEAREST,
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/**
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* Samples the texture through bi-linear interpolation of the four nearest pixels. This produces smoother results than <code>NEAREST</code> filtering.
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*
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* @type {Number}
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* @constant
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*/
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LINEAR: WebGLConstants.LINEAR,
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/**
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* Selects the nearest mip level and applies nearest sampling within that level.
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* <p>
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* Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
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* </p>
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*
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* @type {Number}
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* @constant
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*/
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NEAREST_MIPMAP_NEAREST: WebGLConstants.NEAREST_MIPMAP_NEAREST,
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/**
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* Selects the nearest mip level and applies linear sampling within that level.
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* <p>
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* Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
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* </p>
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*
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* @type {Number}
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* @constant
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*/
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LINEAR_MIPMAP_NEAREST: WebGLConstants.LINEAR_MIPMAP_NEAREST,
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/**
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* Read texture values with nearest sampling from two adjacent mip levels and linearly interpolate the results.
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* <p>
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* This option provides a good balance of visual quality and speed when sampling from a mipmapped texture.
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* </p>
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* <p>
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* Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
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* </p>
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*
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* @type {Number}
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* @constant
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*/
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NEAREST_MIPMAP_LINEAR: WebGLConstants.NEAREST_MIPMAP_LINEAR,
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/**
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* Read texture values with linear sampling from two adjacent mip levels and linearly interpolate the results.
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* <p>
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* This option provides a good balance of visual quality and speed when sampling from a mipmapped texture.
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* </p>
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* <p>
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* Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
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* </p>
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* @type {Number}
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* @constant
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*/
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LINEAR_MIPMAP_LINEAR: WebGLConstants.LINEAR_MIPMAP_LINEAR,
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};
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/**
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* Validates the given <code>textureMinificationFilter</code> with respect to the possible enum values.
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*
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* @private
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*
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* @param textureMinificationFilter
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* @returns {Boolean} <code>true</code> if <code>textureMinificationFilter</code> is valid.
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*/
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TextureMinificationFilter.validate = function (textureMinificationFilter) {
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return (
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textureMinificationFilter === TextureMinificationFilter.NEAREST ||
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textureMinificationFilter === TextureMinificationFilter.LINEAR ||
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textureMinificationFilter ===
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TextureMinificationFilter.NEAREST_MIPMAP_NEAREST ||
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textureMinificationFilter ===
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TextureMinificationFilter.LINEAR_MIPMAP_NEAREST ||
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textureMinificationFilter ===
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TextureMinificationFilter.NEAREST_MIPMAP_LINEAR ||
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textureMinificationFilter === TextureMinificationFilter.LINEAR_MIPMAP_LINEAR
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);
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};
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export default Object.freeze(TextureMinificationFilter);
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