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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertExists } from "../assert/assert_exists.ts";import { describeTextureFormat } from "./describe_texture_format.ts";
function textureDimensionArrayLayerCount(  texture: GPUTextureDescriptor,): number {  switch (texture.dimension) {    case "1d":    case "3d":      return 1;    case undefined:    case "2d":      return normalizeExtent3D(texture.size).depthOrArrayLayers ?? 1;  }}
function normalizeExtent3D(size: GPUExtent3D): GPUExtent3DDict {  if (Array.isArray(size)) {    assertExists(size[0]);    return {      width: size[0],      height: size[1],      depthOrArrayLayers: size[2],    };  } else {    return size;  }}
function extent3DPhysicalSize(  size: GPUExtent3D,  format: GPUTextureFormat,): GPUExtent3DDict {  const [blockWidth, blockHeight] =    describeTextureFormat(format).blockDimensions;  const nSize = normalizeExtent3D(size);
  const width = Math.floor((nSize.width + blockWidth - 1) / blockWidth) *    blockWidth;  const height =    Math.floor(((nSize.height ?? 1) + blockHeight - 1) / blockHeight) *    blockHeight;
  return {    width,    height,    depthOrArrayLayers: nSize.depthOrArrayLayers,  };}
function extent3DMipLevelSize(  size: GPUExtent3D,  level: number,  is3D: boolean,): GPUExtent3DDict {  const nSize = normalizeExtent3D(size);  return {    height: Math.max(1, nSize.width >> level),    width: Math.max(1, (nSize.height ?? 1) >> level),    depthOrArrayLayers: is3D      ? Math.max(1, (nSize.depthOrArrayLayers ?? 1) >> level)      : (nSize.depthOrArrayLayers ?? 1),  };}
function textureMipLevelSize(  descriptor: GPUTextureDescriptor,  level: number,): GPUExtent3DDict | undefined {  if (level >= (descriptor.mipLevelCount ?? 1)) {    return undefined;  }
  return extent3DMipLevelSize(    descriptor.size,    level,    descriptor.dimension === "3d",  );}
/** * Create a {@linkcode GPUTexture} with data. * * @example * ```ts * import { createTextureWithData } from "https://deno.land/std@$STD_VERSION/webgpu/texture_with_data.ts"; * * const adapter = await navigator.gpu.requestAdapter(); * const device = await adapter?.requestDevice()!; * * createTextureWithData(device, { *   format: "bgra8unorm-srgb", *   size: { *     width: 3, *     height: 2, *   }, *   usage: GPUTextureUsage.COPY_SRC, * }, new Uint8Array([1, 1, 1, 1, 1, 1, 1])); * ``` */export function createTextureWithData(  device: GPUDevice,  descriptor: GPUTextureDescriptor,  data: Uint8Array,): GPUTexture {  descriptor.usage |= GPUTextureUsage.COPY_DST;
  const texture = device.createTexture(descriptor);  const layerIterations = textureDimensionArrayLayerCount(descriptor);  const formatInfo = describeTextureFormat(descriptor.format);
  let binaryOffset = 0;  for (let layer = 0; layer < layerIterations; layer++) {    for (let mip = 0; mip < (descriptor.mipLevelCount ?? 1); mip++) {      const mipSize = textureMipLevelSize(descriptor, mip)!;      if (descriptor.dimension !== "3d") {        mipSize.depthOrArrayLayers = 1;      }
      const mipPhysical = extent3DPhysicalSize(mipSize, descriptor.format);      const widthBlocks = Math.floor(        mipPhysical.width / formatInfo.blockDimensions[0],      );      const heightBlocks = Math.floor(        mipPhysical.height! / formatInfo.blockDimensions[1],      );
      const bytesPerRow = widthBlocks * formatInfo.blockSize;      const dataSize = bytesPerRow * heightBlocks * mipSize.depthOrArrayLayers!;
      const endOffset = binaryOffset + dataSize;
      device.queue.writeTexture(        {          texture,          mipLevel: mip,          origin: {            x: 0,            y: 0,            z: layer,          },        },        data.subarray(binaryOffset, endOffset),        {          bytesPerRow,          rowsPerImage: heightBlocks,        },        mipPhysical,      );
      binaryOffset = endOffset;    }  }
  return texture;}