feat: add split to parts by tile size

docs/backlog.md

@@ -65,10 +65,6 @@
       другой инструмент с хардкодед настройками?
 - [ ] qr code to text, text to qr code
 - [ ] bar code to text, text to bar code
-- [ ] split-into-parts-png — режим «по размеру тайла»: указываешь размер тайла
-      (16×16, 32×32…, список `SIZE_PRESETS`), инструмент сам считает сетку —
-      сценарий «режу спрайтшит, знаю размер тайла, не знаю сетку» (новый режим:
-      схема + core, из задачи C3)
 - [ ] нужен инструмент для удаления фона по выбранной точке - удалять внутри
       выделенной области
 - [ ] сделать конвертацию в смайлики\награды для твитча (6 размеров или выбор

web/src/lib/components/schema/SchemaFields.svelte

@@ -83,6 +83,11 @@
 		}
 		return spec;
 	}
+
+	function isHidden(spec: FieldSpec): boolean {
+		const rule = spec.visibleWhen;
+		return rule !== undefined && values[rule.field] !== rule.equals;
+	}
 </script>
 
 {#if isEmpty}
@@ -99,16 +104,19 @@
 				: undefined}
 		>
 			{#each group.fields as id (id)}
-				{@const Control = FIELDS[schema.fields[id].spec.kind]}
+				{@const spec = schema.fields[id].spec}
+				{@const Control = FIELDS[spec.kind]}
+				{#if !isHidden(spec)}
 					<Control
 						label={fieldLabel(schema.fields[id], id)}
 						value={values[id]}
-					spec={effectiveSpec(schema.fields[id].spec)}
+						spec={effectiveSpec(spec)}
 						{toolId}
 						fieldId={id}
 						{sourceDims}
 						onchange={(v, axis) => onchange(id, v, axis)}
 					/>
+				{/if}
 			{/each}
 		</div>
 	{/each}

web/src/lib/core/geometry.test.ts

@@ -7,6 +7,7 @@ import {
 	resize,
 	rotate90,
 	splitToParts,
+	splitToTileSize,
 	tile,
 } from "./geometry";
 import { expectImageEqual, makeImage } from "./test-helpers";
@@ -322,3 +323,63 @@ describe("splitToParts", () => {
 		expect(parts[0].height).toBe(6);
 	});
 });
+
+describe("splitToTileSize", () => {
+	function grid(w: number, h: number): PixelImage {
+		const pixels: number[][] = [];
+		for (let y = 0; y < h; y++) {
+			for (let x = 0; x < w; x++) {
+				const v = y * w + x + 1;
+				pixels.push([v, v, v, 255]);
+			}
+		}
+		return makeImage(w, h, pixels);
+	}
+
+	it("кратный размер: части ровно tileW×tileH без паддинга", () => {
+		const parts = splitToTileSize(grid(4, 4), 2, 2);
+		expect(parts).toHaveLength(4);
+		for (const part of parts) {
+			expect(part.width).toBe(2);
+			expect(part.height).toBe(2);
+		}
+		expectImageEqual(parts[1], [
+			[3, 3, 3, 255],
+			[4, 4, 4, 255],
+			[7, 7, 7, 255],
+			[8, 8, 8, 255],
+		]);
+	});
+
+	it("некратный размер: канвас дополняется прозрачным до кратности", () => {
+		const parts = splitToTileSize(grid(5, 3), 3, 2);
+		expect(parts).toHaveLength(4);
+		for (const part of parts) {
+			expect(part.width).toBe(3);
+			expect(part.height).toBe(2);
+		}
+		expectImageEqual(parts[1], [
+			[4, 4, 4, 255],
+			[5, 5, 5, 255],
+			[0, 0, 0, 0],
+			[9, 9, 9, 255],
+			[10, 10, 10, 255],
+			[0, 0, 0, 0],
+		]);
+		expectImageEqual(parts[2], [
+			[11, 11, 11, 255],
+			[12, 12, 12, 255],
+			[13, 13, 13, 255],
+			[0, 0, 0, 0],
+			[0, 0, 0, 0],
+			[0, 0, 0, 0],
+		]);
+	});
+
+	it("тайл больше картинки — одна часть с паддингом", () => {
+		const parts = splitToTileSize(grid(2, 2), 4, 4);
+		expect(parts).toHaveLength(1);
+		expect(parts[0].width).toBe(4);
+		expect(parts[0].height).toBe(4);
+	});
+});

web/src/lib/core/geometry.ts

@@ -87,6 +87,31 @@ export function splitToParts(
 	return parts;
 }
 
+/** Нарезка по размеру тайла: канвас дополняется прозрачным до кратности. */
+export function splitToTileSize(
+	img: PixelImage,
+	tileW: number,
+	tileH: number,
+): PixelImage[] {
+	const tw = Math.max(1, Math.trunc(tileW));
+	const th = Math.max(1, Math.trunc(tileH));
+	const cols = Math.max(1, Math.ceil(img.width / tw));
+	const rows = Math.max(1, Math.ceil(img.height / th));
+	const gridW = cols * tw;
+	const gridH = rows * th;
+	const padded =
+		gridW === img.width && gridH === img.height
+			? img
+			: expandCanvas(img, 0, 0, gridW - img.width, gridH - img.height);
+	const parts: PixelImage[] = [];
+	for (let row = 0; row < rows; row++) {
+		for (let col = 0; col < cols; col++) {
+			parts.push(crop(padded, col * tw, row * th, tw, th));
+		}
+	}
+	return parts;
+}
+
 export function centerByAlpha(img: PixelImage): PixelImage {
 	let minX = img.width;
 	let minY = img.height;

web/src/lib/i18n/en.ts

@@ -235,6 +235,8 @@ export const en: Dict = {
 		colorTolerance: "Color tolerance",
 		cols: "Cols",
 		columns: "Columns",
+		splitMode: "Split by",
+		tileSize: "Tile size",
 		component: "Component",
 		contrast: "Contrast",
 		count: "Count",
@@ -323,6 +325,8 @@ export const en: Dict = {
 		cropArea: "Crop area",
 		fill: "Fill",
 		grid: "Grid",
+		splitMode: "Split by",
+		tileSize: "Tile size",
 		noise: "Noise",
 		offset: "Offset",
 		options: "Options",
@@ -375,6 +379,11 @@ export const en: Dict = {
 				orientationSquare: "Square — the sides are equal.",
 			},
 		},
+		"split-into-parts": {
+			options: {
+				mode: { grid: "Grid", tile: "Tile size" },
+			},
+		},
 		"show-transparent": {
 			options: {
 				mode: { binary: "Black & white mask", highlight: "Color highlight" },

web/src/lib/i18n/ru.ts

@@ -236,6 +236,8 @@ export const ru: Dict = {
 		colorTolerance: "Допуск похожести",
 		cols: "Колонки",
 		columns: "Столбцы",
+		splitMode: "Делить по",
+		tileSize: "Размер тайла",
 		component: "Компонент",
 		contrast: "Контраст",
 		count: "Количество",
@@ -324,6 +326,8 @@ export const ru: Dict = {
 		cropArea: "Область кадрирования",
 		fill: "Заливка",
 		grid: "Сетка",
+		splitMode: "Режим разделения",
+		tileSize: "Размер тайла",
 		noise: "Шум",
 		offset: "Смещение",
 		options: "Параметры",
@@ -994,6 +998,17 @@ export const ru: Dict = {
 				color: "Цвет фона",
 			},
 		},
+		"split-into-parts": {
+			params: {
+				mode: "Режим",
+				columns: "Столбцов",
+				rows: "Строк",
+				tile: "Размер тайла",
+			},
+			options: {
+				mode: { grid: "Сетка", tile: "Размер тайла" },
+			},
+		},
 		tile: {
 			params: { columns: "Столбцов", rows: "Строк" },
 		},

web/src/lib/registry-schema.ts

@@ -16,6 +16,8 @@ import type { Position9 } from "./core/textdraw";
  */
 export interface FieldSpecBase {
 	label?: string;
+	/** Поле видно только когда другое поле равно значению (режимы инструмента). */
+	visibleWhen?: { field: string; equals: string };
 }
 
 export interface NumberSpec extends FieldSpecBase {
@@ -291,6 +293,7 @@ export const field = {
 		maxFromSource?: boolean;
 		lockAspectWith?: string;
 		presets?: boolean;
+		visibleWhen?: { field: string; equals: string };
 	}): Field<Dimension> => ({
 		spec: { kind: "dimension", ...s },
 	}),

web/src/lib/registry/registry.test.ts

@@ -760,6 +760,25 @@ describe("split-into-parts", () => {
 		expect(files).toHaveLength(1024);
 	});
 
+	it("режим tile: сетка считается от размера тайла, части точные", async () => {
+		const tool = TOOLS.find((t) => t.id === "split-into-parts")!;
+		const files = asFiles(
+			await tool.run({
+				source: solid(100, 70),
+				params: sanitizeSchemaParams(tool.schema, {
+					mode: "tile",
+					tile: { width: 32, height: 32 },
+				}),
+			}),
+		).files;
+		// 100/32 → 4 колонки, 70/32 → 3 строки
+		expect(files).toHaveLength(12);
+		for (const file of files) {
+			expect(file.image.width).toBe(32);
+			expect(file.image.height).toBe(32);
+		}
+	});
+
 	it("выбрасывает errors.tooManyParts при переполнении", () => {
 		const tool = TOOLS.find((t) => t.id === "split-into-parts")!;
 		expect(() =>

web/src/lib/registry/tools/geometry.ts

@@ -17,6 +17,7 @@ import {
 	resize,
 	rotate90,
 	splitToParts,
+	splitToTileSize,
 	symmetricCopy,
 	tile,
 	trimToContent,
@@ -437,17 +438,29 @@ const tileTool: Tool<TileParams> = {
 const MAX_SPLIT_PARTS = 1024;
 
 interface SplitPartsParams {
+	mode: "grid" | "tile";
 	columns: number;
 	rows: number;
+	tile: Dimension;
 }
 
-export const splitPartsSchema = toolSchema<SplitPartsParams>({
+export const splitPartsSchema = toolSchema<SplitPartsParams>(
+	{
+		mode: field.select({
+			label: "fields.splitMode",
+			default: "grid",
+			options: [
+				{ value: "grid", label: "Grid" },
+				{ value: "tile", label: "Tile size" },
+			],
+		}),
 		columns: field.number({
 			label: "fields.columns",
 			min: 1,
 			max: 32,
 			step: 1,
 			default: 2,
+			visibleWhen: { field: "mode", equals: "grid" },
 		}),
 		rows: field.number({
 			label: "fields.rows",
@@ -455,8 +468,28 @@ export const splitPartsSchema = toolSchema<SplitPartsParams>({
 			max: 32,
 			step: 1,
 			default: 2,
+			visibleWhen: { field: "mode", equals: "grid" },
 		}),
-});
+		tile: field.dimension({
+			label: "fields.tileSize",
+			min: 1,
+			max: 20000,
+			width: 32,
+			height: 32,
+			presets: true,
+			visibleWhen: { field: "mode", equals: "tile" },
+		}),
+	},
+	{
+		layout: {
+			groups: [
+				{ title: "groups.splitMode", fields: ["mode"] },
+				{ title: "groups.grid", fields: ["columns", "rows"] },
+				{ title: "groups.tileSize", fields: ["tile"] },
+			],
+		},
+	},
+);
 
 const splitPartsTool: Tool<SplitPartsParams> = {
 	id: "split-into-parts",
@@ -466,8 +499,20 @@ const splitPartsTool: Tool<SplitPartsParams> = {
 	run: (ctx) => {
 		const img = requireSource(ctx);
 		const params = ctx.params as SplitPartsParams;
-		const cols = Math.max(1, Math.trunc(params.columns));
-		const rowsCount = Math.max(1, Math.trunc(params.rows));
+		const cols =
+			params.mode === "tile"
+				? Math.max(
+						1,
+						Math.ceil(img.width / Math.max(1, Math.trunc(params.tile.width))),
+					)
+				: Math.max(1, Math.trunc(params.columns));
+		const rowsCount =
+			params.mode === "tile"
+				? Math.max(
+						1,
+						Math.ceil(img.height / Math.max(1, Math.trunc(params.tile.height))),
+					)
+				: Math.max(1, Math.trunc(params.rows));
 		const count = cols * rowsCount;
 		if (count > MAX_SPLIT_PARTS) {
 			throw new ToolError("errors.tooManyParts", {
@@ -475,7 +520,10 @@ const splitPartsTool: Tool<SplitPartsParams> = {
 				max: MAX_SPLIT_PARTS,
 			});
 		}
-		const parts = splitToParts(img, cols, rowsCount);
+		const parts =
+			params.mode === "tile"
+				? splitToTileSize(img, params.tile.width, params.tile.height)
+				: splitToParts(img, cols, rowsCount);
 		const rowLen = String(rowsCount).length;
 		const colLen = String(cols).length;
 		const files: ToolImageFile[] = parts.map((image, index) => {