62 lines
2.6 KiB
JavaScript
62 lines
2.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.methods = void 0;
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const core_1 = require("@jimp/core");
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const utils_1 = require("@jimp/utils");
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const plugin_resize_1 = require("@jimp/plugin-resize");
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const plugin_blit_1 = require("@jimp/plugin-blit");
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const zod_1 = require("zod");
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const ContainOptionsSchema = zod_1.z.object({
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/** the width to resize the image to */
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w: zod_1.z.number(),
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/** the height to resize the image to */
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h: zod_1.z.number(),
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/** A bitmask for horizontal and vertical alignment */
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align: zod_1.z.number().optional(),
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/** a scaling method (e.g. Jimp.RESIZE_BEZIER) */
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mode: zod_1.z.nativeEnum(plugin_resize_1.ResizeStrategy).optional(),
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});
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exports.methods = {
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/**
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* Scale the image to the given width and height keeping the aspect ratio. Some parts of the image may be letter boxed.
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* @param w the width to resize the image to
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* @param h the height to resize the image to
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* @param align A bitmask for horizontal and vertical alignment
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* @param mode a scaling method (e.g. Jimp.RESIZE_BEZIER)
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* @example
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* ```ts
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* import { Jimp } from "jimp";
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*
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* const image = await Jimp.read("test/image.png");
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*
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* image.contain({ w: 150, h: 100 });
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* ```
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*/
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contain(image, options) {
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const { w, h, align = core_1.HorizontalAlign.CENTER | core_1.VerticalAlign.MIDDLE, mode, } = ContainOptionsSchema.parse(options);
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const hbits = align & ((1 << 3) - 1);
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const vbits = align >> 3;
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// check if more flags than one is in the bit sets
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if (!((hbits !== 0 && !(hbits & (hbits - 1))) ||
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(vbits !== 0 && !(vbits & (vbits - 1))))) {
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throw new Error("only use one flag per alignment direction");
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}
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const alignH = hbits >> 1; // 0, 1, 2
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const alignV = vbits >> 1; // 0, 1, 2
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const f = w / h > image.bitmap.width / image.bitmap.height
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? h / image.bitmap.height
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: w / image.bitmap.width;
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const c = plugin_resize_1.methods.scale((0, utils_1.clone)(image), { f, mode });
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image = plugin_resize_1.methods.resize(image, { w, h, mode });
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image.scan((_, __, idx) => {
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image.bitmap.data.writeUInt32BE(image.background, idx);
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});
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image = plugin_blit_1.methods.blit(image, {
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src: c,
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x: ((image.bitmap.width - c.bitmap.width) / 2) * alignH,
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y: ((image.bitmap.height - c.bitmap.height) / 2) * alignV,
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});
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return image;
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},
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};
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//# sourceMappingURL=index.js.map
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