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std/webgpu/describe_texture_format.ts

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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 Basic usage
* ```ts
* import { describeTextureFormat } from "@std/webgpu/describe-texture-format";
* import { assertEquals } from "@std/assert";
*
* assertEquals(describeTextureFormat("rgba8unorm"), {
* requiredFeature: undefined,
* sampleType: "float",
* allowedUsages: 31,
* blockDimensions: [1, 1],
* blockSize: 4,
* components: 4,
* });
* ```
*
* @param format The format to get the information about.
* @returns An object describing various properties for the provided format.
*/
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],
};
}
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