mirror of
https://github.com/snapotter-hq/SnapOtter.git
synced 2026-08-03 07:46:42 +02:00
Siddharth Kumar Sah
ccac5b885c
Operations: resize, crop, rotate, flip, convert, compress, strip-metadata, brightness, contrast, saturation, color-channels, grayscale, sepia, invert. Includes format detection, MIME mapping, metadata parsing, and engine orchestrator.
16 lines
520 B
TypeScript
16 lines
520 B
TypeScript
import type { Sharp, SaturationOptions } from "../types.js";
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export async function saturation(image: Sharp, options: SaturationOptions): Promise<Sharp> {
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const { value } = options;
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if (value < -100 || value > 100) {
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throw new Error("Saturation value must be between -100 and +100");
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}
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// Map -100..+100 to 0..2 where 1.0 = no change
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// -100 -> 0 (grayscale), 0 -> 1 (no change), +100 -> 2 (double saturation)
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const multiplier = 1 + value / 100;
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return image.modulate({ saturation: multiplier });
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}
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