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// Copyright 2018-2025 the Deno authors. MIT license.
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;
default:
throw new TypeError(
`Cannot count texture dimension layer: dimension value is "${texture.dimension}"`,
);
}
}
function normalizeExtent3D(size: GPUExtent3D): GPUExtent3DDict {
if (Array.isArray(size)) {
if (size[0] === undefined) {
throw new TypeError(
"Cannot normalize Extent3d: width is not defined",
);
}
const dict: GPUExtent3DDict = {
width: size[0],
};
if (size[1] !== undefined) {
dict.height = size[1];
}
if (size[2] !== undefined) {
dict.depthOrArrayLayers = size[2];
}
return dict;
} 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;
const dict: GPUExtent3DDict = {
width,
height,
};
if (nSize.depthOrArrayLayers !== undefined) {
dict.depthOrArrayLayers = nSize.depthOrArrayLayers;
}
return dict;
}
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 Usage
* ```ts ignore
* import { createTextureWithData } from "@std/webgpu/texture-with-data";
*
* 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]));
* ```
*
* @param device The device to create the texture with.
* @param descriptor The texture descriptor to create the texture with.
* @param data The data to write to the texture.
* @returns The newly created texture.
*/
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;
}
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