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import { createElementNS } from '../utils.js';
import { SRGBToLinear } from '../math/ColorManagement.js';

let _canvas;

/**
 * A class containing utility functions for images.
 *
 * @hideconstructor
 */
class ImageUtils {

/**
	 * Returns a data URI containing a representation of the given image.
	 *
	 * @param {(HTMLImageElement|HTMLCanvasElement)} image - The image object.
	 * @return {string} The data URI.
	 */
	static getDataURL( image ) {

if ( /^data:/i.test( image.src ) ) {

return image.src;

}

if ( typeof HTMLCanvasElement === 'undefined' ) {

return image.src;

}

let canvas;

if ( image instanceof HTMLCanvasElement ) {

canvas = image;

} else {

if ( _canvas === undefined ) _canvas = createElementNS( 'canvas' );

_canvas.width = image.width;
			_canvas.height = image.height;

const context = _canvas.getContext( '2d' );

if ( image instanceof ImageData ) {

context.putImageData( image, 0, 0 );

} else {

context.drawImage( image, 0, 0, image.width, image.height );

}

canvas = _canvas;

}

return canvas.toDataURL( 'image/png' );

}

/**
	 * Converts the given sRGB image data to linear color space.
	 *
	 * @param {(HTMLImageElement|HTMLCanvasElement|ImageBitmap|Object)} image - The image object.
	 * @return {HTMLCanvasElement|Object} The converted image.
	 */
	static sRGBToLinear( image ) {

if ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||
			( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||
			( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ) {

const canvas = createElementNS( 'canvas' );

canvas.width = image.width;
			canvas.height = image.height;

const context = canvas.getContext( '2d' );
			context.drawImage( image, 0, 0, image.width, image.height );

const imageData = context.getImageData( 0, 0, image.width, image.height );
			const data = imageData.data;

for ( let i = 0; i < data.length; i ++ ) {

data[ i ] = SRGBToLinear( data[ i ] / 255 ) * 255;

}

context.putImageData( imageData, 0, 0 );

return canvas;

} else if ( image.data ) {

const data = image.data.slice( 0 );

for ( let i = 0; i < data.length; i ++ ) {

if ( data instanceof Uint8Array || data instanceof Uint8ClampedArray ) {

data[ i ] = Math.floor( SRGBToLinear( data[ i ] / 255 ) * 255 );

} else {

// assuming float

data[ i ] = SRGBToLinear( data[ i ] );

}

return {
				data: data,
				width: image.width,
				height: image.height
			};

} else {

console.warn( 'THREE.ImageUtils.sRGBToLinear(): Unsupported image type. No color space conversion applied.' );
			return image;

}

export { ImageUtils };

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Name	Size	Perms	Modified	Actions
core DIR	-	drwxr-xr-x	2025-03-28 11:04:39	Edit Download recursive recursive
curves DIR	-	drwxr-xr-x	2025-03-28 11:04:39	Edit Download recursive recursive
Controls.js	2.31 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
DataUtils.js	4.42 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
Earcut.js	17.87 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
ImageUtils.js	2.71 KB	lrw-r--r--	2025-03-28 11:04:38	Edit Download recursive recursive
PMREMGenerator.js	22.99 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
ShapeUtils.js	2.26 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
TextureUtils.js	10.13 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive

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