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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
/** Return type for {@linkcode describeTextureFormat}. */export interface TextureFormatInfo {  /** The specific feature needed to use the format, if any. */  requiredFeature?: GPUFeatureName;  /** Type of sampling that is valid for the texture. */  sampleType: GPUTextureSampleType;  /** Valid bits of {@linkcode GPUTextureUsage}. */  allowedUsages: number;  /** Dimension of a "block" of texels. This is always `[1, 1]` on   * uncompressed textures. */  blockDimensions: [number, number];  /** Size in bytes of a "block" of texels. This is the size per pixel on   * uncompressed textures. */  blockSize: number;  /** Count of components in the texture. This determines which components   * there will be actual data in the shader for. */  components: number;}
const basic = GPUTextureUsage.COPY_SRC | GPUTextureUsage.COPY_DST |  GPUTextureUsage.TEXTURE_BINDING;const attachment = basic | GPUTextureUsage.RENDER_ATTACHMENT;const storage = basic | GPUTextureUsage.STORAGE_BINDING;const allFlags = GPUTextureUsage.COPY_SRC | GPUTextureUsage.COPY_DST |  GPUTextureUsage.TEXTURE_BINDING | GPUTextureUsage.STORAGE_BINDING |  GPUTextureUsage.RENDER_ATTACHMENT;
/** * Get various information about a specific {@linkcode GPUTextureFormat}. * * @example * ```ts * import { describeTextureFormat } from "https://deno.land/std@$STD_VERSION/webgpu/describe_texture_format.ts"; * * describeTextureFormat("rgba8unorm-srgb"); * ``` */export function describeTextureFormat(  format: GPUTextureFormat,): TextureFormatInfo {  let info: [    requiredFeatures: GPUFeatureName | undefined,    sampleType: GPUTextureSampleType,    usage: number,    blockDimensions: [number, number],    blockSize: number,    components: number,  ];
  switch (format) {    case "r8unorm":      info = [undefined, "float", attachment, [1, 1], 1, 1];      break;    case "r8snorm":      info = [undefined, "float", basic, [1, 1], 1, 1];      break;    case "r8uint":      info = [undefined, "uint", attachment, [1, 1], 1, 1];      break;    case "r8sint":      info = [undefined, "sint", attachment, [1, 1], 1, 1];      break;
    case "r16uint":      info = [undefined, "uint", attachment, [1, 1], 2, 1];      break;    case "r16sint":      info = [undefined, "sint", attachment, [1, 1], 2, 1];      break;    case "r16float":      info = [undefined, "float", attachment, [1, 1], 2, 1];      break;    case "rg8unorm":      info = [undefined, "float", attachment, [1, 1], 2, 2];      break;    case "rg8snorm":      info = [undefined, "float", attachment, [1, 1], 2, 2];      break;    case "rg8uint":      info = [undefined, "uint", attachment, [1, 1], 2, 2];      break;    case "rg8sint":      info = [undefined, "sint", basic, [1, 1], 2, 2];      break;
    case "r32uint":      info = [undefined, "uint", allFlags, [1, 1], 4, 1];      break;    case "r32sint":      info = [undefined, "sint", allFlags, [1, 1], 4, 1];      break;    case "r32float":      info = [undefined, "unfilterable-float", allFlags, [1, 1], 4, 1];      break;    case "rg16uint":      info = [undefined, "uint", attachment, [1, 1], 4, 2];      break;    case "rg16sint":      info = [undefined, "sint", attachment, [1, 1], 4, 2];      break;    case "rg16float":      info = [undefined, "float", attachment, [1, 1], 4, 2];      break;    case "rgba8unorm":      info = [undefined, "float", allFlags, [1, 1], 4, 4];      break;    case "rgba8unorm-srgb":      info = [undefined, "float", attachment, [1, 1], 4, 4];      break;    case "rgba8snorm":      info = [undefined, "float", storage, [1, 1], 4, 4];      break;    case "rgba8uint":      info = [undefined, "uint", allFlags, [1, 1], 4, 4];      break;    case "rgba8sint":      info = [undefined, "sint", allFlags, [1, 1], 4, 4];      break;    case "bgra8unorm":      info = [undefined, "float", attachment, [1, 1], 4, 4];      break;    case "bgra8unorm-srgb":      info = [undefined, "float", attachment, [1, 1], 4, 4];      break;
    case "rgb9e5ufloat":      info = [undefined, "float", basic, [1, 1], 4, 3];      break;
    case "rgb10a2unorm":      info = [undefined, "float", attachment, [1, 1], 4, 4];      break;    case "rg11b10ufloat":      info = [undefined, "float", basic, [1, 1], 4, 3];      break;
    case "rg32uint":      info = [undefined, "uint", allFlags, [1, 1], 8, 2];      break;    case "rg32sint":      info = [undefined, "sint", allFlags, [1, 1], 8, 2];      break;    case "rg32float":      info = [undefined, "unfilterable-float", allFlags, [1, 1], 8, 2];      break;    case "rgba16uint":      info = [undefined, "uint", allFlags, [1, 1], 8, 4];      break;    case "rgba16sint":      info = [undefined, "sint", allFlags, [1, 1], 8, 4];      break;    case "rgba16float":      info = [undefined, "float", allFlags, [1, 1], 8, 4];      break;
    case "rgba32uint":      info = [undefined, "uint", allFlags, [1, 1], 16, 4];      break;    case "rgba32sint":      info = [undefined, "sint", allFlags, [1, 1], 16, 4];      break;    case "rgba32float":      info = [undefined, "float", allFlags, [1, 1], 16, 4];      break;
    case "stencil8":      info = [undefined, "uint", attachment, [1, 1], 1, 1];      break;    case "depth16unorm":      info = [undefined, "depth", attachment, [1, 1], 2, 1];      break;    case "depth24plus":      info = [undefined, "depth", attachment, [1, 1], 4, 1];      break;    case "depth24plus-stencil8":      info = [undefined, "depth", attachment, [1, 1], 4, 2];      break;    case "depth32float":      info = [undefined, "depth", attachment, [1, 1], 4, 1];      break;
    case "depth32float-stencil8":      info = ["depth32float-stencil8", "depth", attachment, [1, 1], 4, 2];      break;
    case "bc1-rgba-unorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 8, 4];      break;    case "bc1-rgba-unorm-srgb":      info = ["texture-compression-bc", "float", basic, [4, 4], 8, 4];      break;    case "bc2-rgba-unorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 4];      break;    case "bc2-rgba-unorm-srgb":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 4];      break;    case "bc3-rgba-unorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 4];      break;    case "bc3-rgba-unorm-srgb":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 4];      break;    case "bc4-r-unorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 8, 1];      break;    case "bc4-r-snorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 8, 1];      break;    case "bc5-rg-unorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 2];      break;    case "bc5-rg-snorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 2];      break;    case "bc6h-rgb-ufloat":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 3];      break;    case "bc6h-rgb-float":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 3];      break;    case "bc7-rgba-unorm":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 4];      break;    case "bc7-rgba-unorm-srgb":      info = ["texture-compression-bc", "float", basic, [4, 4], 16, 4];      break;
    case "etc2-rgb8unorm":      info = ["texture-compression-etc2", "float", basic, [4, 4], 8, 3];      break;    case "etc2-rgb8unorm-srgb":      info = ["texture-compression-etc2", "float", basic, [4, 4], 8, 3];      break;    case "etc2-rgb8a1unorm":      info = ["texture-compression-etc2", "float", basic, [4, 4], 8, 4];      break;    case "etc2-rgb8a1unorm-srgb":      info = ["texture-compression-etc2", "float", basic, [4, 4], 8, 4];      break;    case "etc2-rgba8unorm":      info = ["texture-compression-etc2", "float", basic, [4, 4], 16, 4];      break;    case "etc2-rgba8unorm-srgb":      info = ["texture-compression-etc2", "float", basic, [4, 4], 16, 4];      break;    case "eac-r11unorm":      info = ["texture-compression-etc2", "float", basic, [4, 4], 8, 1];      break;    case "eac-r11snorm":      info = ["texture-compression-etc2", "float", basic, [4, 4], 8, 1];      break;    case "eac-rg11unorm":      info = ["texture-compression-etc2", "float", basic, [4, 4], 16, 2];      break;    case "eac-rg11snorm":      info = ["texture-compression-etc2", "float", basic, [4, 4], 16, 2];      break;
    case "astc-4x4-unorm":      info = ["texture-compression-astc", "float", basic, [4, 4], 16, 4];      break;    case "astc-4x4-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [4, 4], 16, 4];      break;    case "astc-5x4-unorm":      info = ["texture-compression-astc", "float", basic, [5, 4], 16, 4];      break;    case "astc-5x4-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [5, 4], 16, 4];      break;    case "astc-5x5-unorm":      info = ["texture-compression-astc", "float", basic, [5, 5], 16, 4];      break;    case "astc-5x5-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [5, 5], 16, 4];      break;    case "astc-6x5-unorm":      info = ["texture-compression-astc", "float", basic, [6, 5], 16, 4];      break;    case "astc-6x5-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [6, 5], 16, 4];      break;    case "astc-6x6-unorm":      info = ["texture-compression-astc", "float", basic, [6, 6], 16, 4];      break;    case "astc-6x6-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [6, 6], 16, 4];      break;    case "astc-8x5-unorm":      info = ["texture-compression-astc", "float", basic, [8, 5], 16, 4];      break;    case "astc-8x5-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [8, 5], 16, 4];      break;    case "astc-8x6-unorm":      info = ["texture-compression-astc", "float", basic, [8, 6], 16, 4];      break;    case "astc-8x6-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [8, 6], 16, 4];      break;    case "astc-8x8-unorm":      info = ["texture-compression-astc", "float", basic, [8, 8], 16, 4];      break;    case "astc-8x8-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [8, 8], 16, 4];      break;    case "astc-10x5-unorm":      info = ["texture-compression-astc", "float", basic, [10, 5], 16, 4];      break;    case "astc-10x5-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [10, 5], 16, 4];      break;    case "astc-10x6-unorm":      info = ["texture-compression-astc", "float", basic, [10, 6], 16, 4];      break;    case "astc-10x6-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [10, 6], 16, 4];      break;    case "astc-10x8-unorm":      info = ["texture-compression-astc", "float", basic, [10, 8], 16, 4];      break;    case "astc-10x8-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [10, 8], 16, 4];      break;    case "astc-10x10-unorm":      info = ["texture-compression-astc", "float", basic, [10, 10], 16, 4];      break;    case "astc-10x10-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [10, 10], 16, 4];      break;    case "astc-12x10-unorm":      info = ["texture-compression-astc", "float", basic, [12, 10], 16, 4];      break;    case "astc-12x10-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [12, 10], 16, 4];      break;    case "astc-12x12-unorm":      info = ["texture-compression-astc", "float", basic, [12, 12], 16, 4];      break;    case "astc-12x12-unorm-srgb":      info = ["texture-compression-astc", "float", basic, [12, 12], 16, 4];      break;
    default:      throw new TypeError(`Unsupported GPUTextureFormat '${format}'`);  }
  return {    requiredFeature: info[0],    sampleType: info[1],    allowedUsages: info[2],    blockDimensions: info[3],    blockSize: info[4],    components: info[5],  };}