enhance(frontend): 画像エフェクト「色調補正」を追加 (#16170)

locales/index.d.ts

@@ -12176,6 +12176,10 @@ export interface Locale extends ILocale {
              * 白黒
              */
             "grayscale": string;
+            /**
+             * 色調補正
+             */
+            "colorAdjust": string;
             /**
              * 色の圧縮
              */

locales/ja-JP.yml

@@ -3262,6 +3262,7 @@ _imageEffector:
     mirror: "ミラー"
     invert: "色の反転"
     grayscale: "白黒"
+    colorAdjust: "色調補正"
     colorClamp: "色の圧縮"
     colorClampAdvanced: "色の圧縮(高度)"
     distort: "歪み"

packages/frontend/src/utility/image-effector/fxs.ts

@@ -5,6 +5,7 @@
 
 import { FX_checker } from './fxs/checker.js';
 import { FX_chromaticAberration } from './fxs/chromaticAberration.js';
+import { FX_colorAdjust } from './fxs/colorAdjust.js';
 import { FX_colorClamp } from './fxs/colorClamp.js';
 import { FX_colorClampAdvanced } from './fxs/colorClampAdvanced.js';
 import { FX_distort } from './fxs/distort.js';
@@ -26,6 +27,7 @@ export const FXS = [
 	FX_mirror,
 	FX_invert,
 	FX_grayscale,
+	FX_colorAdjust,
 	FX_colorClamp,
 	FX_colorClampAdvanced,
 	FX_distort,

packages/frontend/src/utility/image-effector/fxs/colorAdjust.ts

@@ -0,0 +1,136 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineImageEffectorFx } from '../ImageEffector.js';
+import { i18n } from '@/i18n.js';
+
+const shader = `#version 300 es
+precision mediump float;
+
+in vec2 in_uv;
+uniform sampler2D in_texture;
+uniform vec2 in_resolution;
+uniform float u_brightness;
+uniform float u_contrast;
+uniform float u_hue;
+uniform float u_lightness;
+uniform float u_saturation;
+out vec4 out_color;
+
+// RGB to HSL
+vec3 rgb2hsl(vec3 c) {
+	float maxc = max(max(c.r, c.g), c.b);
+	float minc = min(min(c.r, c.g), c.b);
+	float l = (maxc + minc) * 0.5;
+	float s = 0.0;
+	float h = 0.0;
+	if (maxc != minc) {
+		float d = maxc - minc;
+		s = l > 0.5 ? d / (2.0 - maxc - minc) : d / (maxc + minc);
+		if (maxc == c.r) {
+			h = (c.g - c.b) / d + (c.g < c.b ? 6.0 : 0.0);
+		} else if (maxc == c.g) {
+			h = (c.b - c.r) / d + 2.0;
+		} else {
+			h = (c.r - c.g) / d + 4.0;
+		}
+		h /= 6.0;
+	}
+	return vec3(h, s, l);
+}
+
+// HSL to RGB
+float hue2rgb(float p, float q, float t) {
+	if (t < 0.0) t += 1.0;
+	if (t > 1.0) t -= 1.0;
+	if (t < 1.0/6.0) return p + (q - p) * 6.0 * t;
+	if (t < 1.0/2.0) return q;
+	if (t < 2.0/3.0) return p + (q - p) * (2.0/3.0 - t) * 6.0;
+	return p;
+}
+vec3 hsl2rgb(vec3 hsl) {
+	float r, g, b;
+	float h = hsl.x;
+	float s = hsl.y;
+	float l = hsl.z;
+	if (s == 0.0) {
+		r = g = b = l;
+	} else {
+		float q = l < 0.5 ? l * (1.0 + s) : l + s - l * s;
+		float p = 2.0 * l - q;
+		r = hue2rgb(p, q, h + 1.0/3.0);
+		g = hue2rgb(p, q, h);
+		b = hue2rgb(p, q, h - 1.0/3.0);
+	}
+	return vec3(r, g, b);
+}
+
+void main() {
+	vec4 in_color = texture(in_texture, in_uv);
+	vec3 color = in_color.rgb;
+
+	color = color * u_brightness;
+	color += vec3(clamp(u_lightness, 0.0, 2.0) - 1.0);
+	color = (color - 0.5) * u_contrast + 0.5;
+
+	vec3 hsl = rgb2hsl(color);
+	hsl.x = mod(hsl.x + u_hue, 1.0);
+	hsl.y = clamp(hsl.y * u_saturation, 0.0, 1.0);
+
+	color = hsl2rgb(hsl);
+	out_color = vec4(color, in_color.a);
+}
+`;
+
+export const FX_colorAdjust = defineImageEffectorFx({
+	id: 'colorAdjust' as const,
+	name: i18n.ts._imageEffector._fxs.colorAdjust,
+	shader,
+	uniforms: ['lightness', 'contrast', 'hue', 'brightness', 'saturation'] as const,
+	params: {
+		lightness: {
+			type: 'number' as const,
+			default: 100,
+			min: 0,
+			max: 200,
+			step: 1,
+		},
+		contrast: {
+			type: 'number' as const,
+			default: 100,
+			min: 0,
+			max: 200,
+			step: 1,
+		},
+		hue: {
+			type: 'number' as const,
+			default: 0,
+			min: -360,
+			max: 360,
+			step: 1,
+		},
+		brightness: {
+			type: 'number' as const,
+			default: 100,
+			min: 0,
+			max: 200,
+			step: 1,
+		},
+		saturation: {
+			type: 'number' as const,
+			default: 100,
+			min: 0,
+			max: 200,
+			step: 1,
+		},
+	},
+	main: ({ gl, u, params }) => {
+		gl.uniform1f(u.brightness, params.brightness / 100);
+		gl.uniform1f(u.contrast, params.contrast / 100);
+		gl.uniform1f(u.hue, params.hue / 360);
+		gl.uniform1f(u.lightness, params.lightness / 100);
+		gl.uniform1f(u.saturation, params.saturation / 100);
+	},
+});