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142 lines
4 KiB
TypeScript
142 lines
4 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// deno-lint-ignore-file no-var
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/// <reference no-default-lib="true" />
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/// <reference lib="esnext" />
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/**
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* Specifies whether the image should be decoded using color space conversion.
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* Either none or default (default). The value default indicates that
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* implementation-specific behavior is used.
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*
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* @category Canvas
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*/
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type ColorSpaceConversion = "default" | "none";
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/**
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* Specifies how the bitmap image should be oriented.
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*
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* @category Canvas
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*/
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type ImageOrientation = "flipY" | "from-image" | "none";
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/**
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* Specifies whether the bitmap's color channels should be premultiplied by
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* the alpha channel.
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*
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* @category Canvas
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*/
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type PremultiplyAlpha = "default" | "none" | "premultiply";
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/**
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* Specifies the algorithm to be used for resizing the input to match the
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* output dimensions. One of `pixelated`, `low` (default), `medium`, or `high`.
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*
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* @category Canvas
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*/
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type ResizeQuality = "high" | "low" | "medium" | "pixelated";
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/**
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* The `ImageBitmapSource` type represents an image data source that can be
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* used to create an `ImageBitmap`.
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*
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* @category Canvas */
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type ImageBitmapSource = Blob | ImageData;
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/**
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* The options of {@linkcode createImageBitmap}.
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*
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* @category Canvas */
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interface ImageBitmapOptions {
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/**
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* Specifies whether the image should be decoded using color space
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* conversion. Either none or default (default). The value default
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* indicates that implementation-specific behavior is used.
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*/
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colorSpaceConversion?: ColorSpaceConversion;
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/** Specifies how the bitmap image should be oriented. */
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imageOrientation?: ImageOrientation;
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/**
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* Specifies whether the bitmap's color channels should be premultiplied
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* by the alpha channel. One of none, premultiply, or default (default).
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*/
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premultiplyAlpha?: PremultiplyAlpha;
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/** The output height. */
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resizeHeight?: number;
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/**
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* Specifies the algorithm to be used for resizing the input to match the
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* output dimensions. One of pixelated, low (default), medium, or high.
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*/
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resizeQuality?: ResizeQuality;
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/** The output width. */
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resizeWidth?: number;
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}
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/**
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* Create a new {@linkcode ImageBitmap} object from a given source.
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*
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* @param image The image to create an {@linkcode ImageBitmap} from.
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* @param options The options for creating the {@linkcode ImageBitmap}.
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*
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* @category Canvas
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*/
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declare function createImageBitmap(
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image: ImageBitmapSource,
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options?: ImageBitmapOptions,
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): Promise<ImageBitmap>;
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/**
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* Create a new {@linkcode ImageBitmap} object from a given source, cropping
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* to the specified rectangle.
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*
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* @param image The image to create an {@linkcode ImageBitmap} from.
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* @param sx The x coordinate of the top-left corner of the sub-rectangle from
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* which the {@linkcode ImageBitmap} will be cropped.
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* @param sy The y coordinate of the top-left corner of the sub-rectangle from
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* which the {@linkcode ImageBitmap} will be cropped.
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* @param sw The width of the sub-rectangle from which the
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* {@linkcode ImageBitmap} will be cropped.
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* @param sh The height of the sub-rectangle from which the
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* {@linkcode ImageBitmap} will be cropped.
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* @param options The options for creating the {@linkcode ImageBitmap}.
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*
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* @category Canvas
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*/
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declare function createImageBitmap(
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image: ImageBitmapSource,
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sx: number,
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sy: number,
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sw: number,
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sh: number,
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options?: ImageBitmapOptions,
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): Promise<ImageBitmap>;
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/**
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* `ImageBitmap` interface represents a bitmap image which can be drawn to a canvas.
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*
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* @category Canvas
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*/
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interface ImageBitmap {
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/**
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* The height of the bitmap.
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*/
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readonly height: number;
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/**
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* The width of the bitmap.
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*/
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readonly width: number;
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/**
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* Releases imageBitmap's resources.
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*/
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close(): void;
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}
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/**
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* `ImageBitmap` represents a bitmap image which can be drawn to a canvas.
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*
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* @category Canvas
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*/
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declare var ImageBitmap: {
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prototype: ImageBitmap;
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new (): ImageBitmap;
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};
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