573 lines
20 KiB
TypeScript
573 lines
20 KiB
TypeScript
import { NextRequest, NextResponse } from "next/server";
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import sharp from "sharp";
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import { auth } from "@/app/(auth)/auth";
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import { fetchImageBufferFromUrl } from "@/lib/ai/rmbg/service";
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import {
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createCanvasImageTask,
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enqueueCanvasImageTask,
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getCanvasImageTaskForUser,
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} from "@/lib/canvas/image-task-queue";
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import type { CanvasGenerateImageRequest } from "@/lib/canvas/generate-image";
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import { getPointsSystemConfig } from "@/lib/db/queries";
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import { getImageToolCreditCost } from "@/lib/points/config";
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import { prepareFeaturePointsCharge } from "@/lib/points/feature-charge";
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import { uploadFile } from "@/lib/storage/service";
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export const runtime = "nodejs";
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export const maxDuration = 120;
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type LocalEditRect = {
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x?: number;
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y?: number;
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width?: number;
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height?: number;
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};
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type LocalEditRegionInput = {
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id?: string;
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index?: number;
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color?: string;
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prompt?: string;
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rect?: LocalEditRect;
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referenceImages?: Array<{
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id?: string;
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url?: string;
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name?: string;
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source?: string;
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}>;
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};
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type LocalEditRequest = {
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sourceImageUrl?: string;
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sourceNodeId?: string;
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regions?: LocalEditRegionInput[];
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model?: string;
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imageSize?: string;
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aspectRatio?: string;
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};
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type NormalizedLocalEditRegion = {
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id: string;
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index: number;
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color: string;
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colorName: string;
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prompt: string;
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referenceImages: Array<{
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id: string;
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url: string;
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name?: string;
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source: "upload" | "canvas";
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}>;
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rect: {
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x: number;
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y: number;
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width: number;
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height: number;
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};
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pixelRect: {
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left: number;
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top: number;
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width: number;
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height: number;
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};
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};
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const MAX_LOCAL_EDIT_REGIONS = 8;
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const MAX_REFERENCE_IMAGES_PER_REGION = 3;
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const MIN_REGION_EDGE_PX = 24;
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const DEFAULT_REGION_COLORS = [
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"#ff3b30",
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"#1677ff",
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"#00c853",
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"#ff9500",
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"#af52de",
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"#00bcd4",
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"#ff2d55",
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"#8d6e63",
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];
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const SUPPORTED_LOCAL_EDIT_ASPECT_RATIOS = [
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"1:1",
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"1:4",
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"1:8",
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"2:3",
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"3:2",
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"3:4",
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"4:1",
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"4:3",
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"4:5",
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"5:4",
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"8:1",
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"9:16",
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"16:9",
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"21:9",
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] as const;
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function clamp(value: number, min: number, max: number) {
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return Math.min(max, Math.max(min, value));
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}
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function parseAspectRatioValue(ratio: string) {
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const [width, height] = ratio.split(":").map((part) => Number(part));
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if (!Number.isFinite(width) || !Number.isFinite(height) || width <= 0 || height <= 0) {
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return 1;
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}
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return width / height;
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}
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function inferClosestAspectRatio(width: number, height: number) {
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if (!Number.isFinite(width) || !Number.isFinite(height) || width <= 0 || height <= 0) {
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return "1:1";
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}
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const sourceRatio = width / height;
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let closest: (typeof SUPPORTED_LOCAL_EDIT_ASPECT_RATIOS)[number] = "1:1";
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let closestDiff = Number.POSITIVE_INFINITY;
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for (const candidate of SUPPORTED_LOCAL_EDIT_ASPECT_RATIOS) {
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const diff = Math.abs(parseAspectRatioValue(candidate) - sourceRatio);
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if (diff < closestDiff) {
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closest = candidate;
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closestDiff = diff;
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}
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}
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return closest;
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}
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function resolveLocalEditAspectRatio(input: unknown, sourceWidth: number, sourceHeight: number) {
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const requested = String(input || "").trim();
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if (
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requested &&
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requested.toLowerCase() !== "auto" &&
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(SUPPORTED_LOCAL_EDIT_ASPECT_RATIOS as readonly string[]).includes(requested)
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) {
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return requested;
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}
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return inferClosestAspectRatio(sourceWidth, sourceHeight);
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}
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function toArrayBuffer(buffer: Buffer) {
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return buffer.buffer.slice(
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buffer.byteOffset,
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buffer.byteOffset + buffer.byteLength
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) as ArrayBuffer;
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}
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function escapeXml(value: string) {
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return value
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.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">")
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.replace(/"/g, """)
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.replace(/'/g, "'");
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}
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function normalizeHexColor(input: unknown, fallback: string) {
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const raw = String(input || "").trim();
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const expanded = raw.replace(/^#([0-9a-f])([0-9a-f])([0-9a-f])$/i, "#$1$1$2$2$3$3");
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return /^#[0-9a-f]{6}$/i.test(expanded) ? expanded.toLowerCase() : fallback;
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}
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function normalizeHttpImageUrl(input: unknown) {
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const raw = String(input || "").trim();
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if (!/^https?:\/\//i.test(raw)) return "";
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return raw;
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}
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function normalizeRegionReferenceImages(
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region: LocalEditRegionInput,
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itemIndex: number
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): NormalizedLocalEditRegion["referenceImages"] {
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if (!Array.isArray(region.referenceImages)) return [];
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return region.referenceImages
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.map((reference, referenceIndex) => {
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const url = normalizeHttpImageUrl(reference?.url);
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if (!url) return null;
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const name =
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typeof reference?.name === "string" && reference.name.trim()
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? reference.name.trim().slice(0, 80)
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: "";
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return {
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id:
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typeof reference?.id === "string" && reference.id.trim()
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? reference.id.trim()
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: `region-${itemIndex + 1}-reference-${referenceIndex + 1}`,
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url,
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...(name ? { name } : {}),
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source: reference?.source === "canvas" ? "canvas" as const : "upload" as const,
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};
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})
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.filter((item): item is NormalizedLocalEditRegion["referenceImages"][number] =>
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Boolean(item)
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)
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.slice(0, MAX_REFERENCE_IMAGES_PER_REGION);
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}
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function getColorName(hex: string) {
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const normalized = hex.toLowerCase();
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const names: Record<string, string> = {
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"#ff3b30": "红色",
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"#1677ff": "蓝色",
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"#00c853": "绿色",
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"#ff9500": "橙色",
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"#af52de": "紫色",
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"#00bcd4": "青色",
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"#ff2d55": "玫红色",
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"#8d6e63": "棕色",
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};
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return names[normalized] || `${normalized} 色`;
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}
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function normalizeRect(input: LocalEditRect | undefined) {
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if (!input) return null;
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const x = Number(input.x);
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const y = Number(input.y);
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const width = Number(input.width);
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const height = Number(input.height);
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if (![x, y, width, height].every(Number.isFinite)) return null;
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const left = clamp(Math.min(x, x + width), 0, 1);
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const top = clamp(Math.min(y, y + height), 0, 1);
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const right = clamp(Math.max(x, x + width), 0, 1);
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const bottom = clamp(Math.max(y, y + height), 0, 1);
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const normalizedWidth = clamp(right - left, 0, 1 - left);
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const normalizedHeight = clamp(bottom - top, 0, 1 - top);
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if (normalizedWidth <= 0 || normalizedHeight <= 0) return null;
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return {
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x: left,
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y: top,
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width: normalizedWidth,
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height: normalizedHeight,
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};
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}
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function rectToPixels(
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rect: NonNullable<ReturnType<typeof normalizeRect>>,
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sourceWidth: number,
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sourceHeight: number
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) {
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const left = clamp(Math.round(rect.x * sourceWidth), 0, Math.max(0, sourceWidth - 1));
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const top = clamp(Math.round(rect.y * sourceHeight), 0, Math.max(0, sourceHeight - 1));
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const width = clamp(Math.round(rect.width * sourceWidth), 1, sourceWidth - left);
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const height = clamp(Math.round(rect.height * sourceHeight), 1, sourceHeight - top);
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return { left, top, width, height };
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}
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function wrapText(text: string, maxChars: number, maxLines = 3) {
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const compact = text.replace(/\s+/g, " ").trim();
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if (!compact) return [];
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const lines: string[] = [];
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let remaining = compact;
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while (remaining.length > 0 && lines.length < maxLines) {
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if (remaining.length <= maxChars) {
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lines.push(remaining);
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break;
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}
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lines.push(remaining.slice(0, maxChars));
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remaining = remaining.slice(maxChars);
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}
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if (remaining.length > 0 && lines.length >= maxLines) {
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lines[lines.length - 1] = `${lines[lines.length - 1].slice(0, Math.max(1, maxChars - 1))}…`;
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}
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return lines;
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}
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function normalizeRegions(
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rawRegions: LocalEditRegionInput[] | undefined,
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sourceWidth: number,
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sourceHeight: number
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): NormalizedLocalEditRegion[] {
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if (!Array.isArray(rawRegions) || rawRegions.length === 0) {
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throw new Error("请先框选至少一个局部编辑区域");
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}
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if (rawRegions.length > MAX_LOCAL_EDIT_REGIONS) {
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throw new Error(`局部编辑最多支持 ${MAX_LOCAL_EDIT_REGIONS} 个区域`);
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}
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return rawRegions.map((region, itemIndex) => {
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const rect = normalizeRect(region.rect);
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if (!rect) {
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throw new Error(`区域 ${itemIndex + 1} 缺少有效框选范围`);
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}
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const prompt = String(region.prompt || "").trim();
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if (!prompt) {
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throw new Error(`区域 ${itemIndex + 1} 请填写局部编辑提示词`);
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}
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const pixelRect = rectToPixels(rect, sourceWidth, sourceHeight);
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if (pixelRect.width < MIN_REGION_EDGE_PX || pixelRect.height < MIN_REGION_EDGE_PX) {
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throw new Error(`区域 ${itemIndex + 1} 过小，请重新框选更大的范围`);
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}
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const color = normalizeHexColor(
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region.color,
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DEFAULT_REGION_COLORS[itemIndex % DEFAULT_REGION_COLORS.length]
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);
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return {
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id: String(region.id || `region-${itemIndex + 1}`),
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index: itemIndex + 1,
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color,
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colorName: getColorName(color),
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prompt: prompt.slice(0, 300),
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referenceImages: normalizeRegionReferenceImages(region, itemIndex),
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rect,
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pixelRect,
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};
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});
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}
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function buildAnnotationSvg(params: {
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width: number;
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height: number;
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regions: NormalizedLocalEditRegion[];
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}) {
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const { width, height, regions } = params;
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const minSide = Math.max(1, Math.min(width, height));
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const strokeWidth = Math.max(4, Math.round(minSide * 0.006));
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const fontSize = Math.max(24, Math.round(minSide * 0.026));
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const smallFontSize = Math.max(18, Math.round(fontSize * 0.72));
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const padX = Math.round(fontSize * 0.55);
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const padY = Math.round(fontSize * 0.34);
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const gap = Math.round(fontSize * 0.34);
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const radius = Math.round(fontSize * 0.5);
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const regionSvg = regions
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.map((region) => {
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const { left, top, width: rectWidth, height: rectHeight } = region.pixelRect;
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const labelText = `区域${region.index} ${region.prompt}`;
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const maxChars = Math.max(8, Math.min(24, Math.floor((width * 0.42) / Math.max(1, fontSize * 0.58))));
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const lines = wrapText(labelText, maxChars, 3);
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const labelWidth = Math.min(
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Math.max(
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rectWidth,
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...lines.map((line) => Math.ceil(line.length * fontSize * 0.62) + padX * 2)
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),
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Math.max(180, width - 16)
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);
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const labelHeight = lines.length * Math.round(fontSize * 1.24) + padY * 2;
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const preferBelow = top + rectHeight + gap + labelHeight <= height - 8;
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const labelX = clamp(left, 8, Math.max(8, width - labelWidth - 8));
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const labelY = preferBelow
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? top + rectHeight + gap
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: clamp(top - gap - labelHeight, 8, Math.max(8, height - labelHeight - 8));
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const badgeSize = Math.max(34, Math.round(fontSize * 1.35));
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const badgeCx = clamp(left, badgeSize / 2 + 6, width - badgeSize / 2 - 6);
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const badgeCy = clamp(top, badgeSize / 2 + 6, height - badgeSize / 2 - 6);
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const textLines = lines
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.map(
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(line, lineIndex) =>
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`<text x="${labelX + padX}" y="${labelY + padY + fontSize + lineIndex * Math.round(fontSize * 1.24)}" fill="#ffffff" font-size="${fontSize}" font-family="Arial, Helvetica, sans-serif" font-weight="700">${escapeXml(line)}</text>`
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)
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.join("");
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return `
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<rect x="${left}" y="${top}" width="${rectWidth}" height="${rectHeight}" rx="${radius}" fill="none" stroke="${region.color}" stroke-width="${strokeWidth}" />
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<rect x="${left}" y="${top}" width="${rectWidth}" height="${rectHeight}" rx="${radius}" fill="${region.color}" opacity="0.08" />
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<circle cx="${badgeCx}" cy="${badgeCy}" r="${badgeSize / 2}" fill="${region.color}" stroke="#ffffff" stroke-width="${Math.max(2, Math.round(strokeWidth * 0.45))}" />
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<text x="${badgeCx}" y="${badgeCy + smallFontSize * 0.38}" text-anchor="middle" fill="#ffffff" font-size="${smallFontSize}" font-family="Arial, Helvetica, sans-serif" font-weight="800">${region.index}</text>
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<rect x="${labelX}" y="${labelY}" width="${labelWidth}" height="${labelHeight}" rx="${radius}" fill="#000000" opacity="0.78" stroke="${region.color}" stroke-width="${Math.max(2, Math.round(strokeWidth * 0.5))}" />
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${textLines}
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`;
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})
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.join("");
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return Buffer.from(`
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<svg width="${width}" height="${height}" viewBox="0 0 ${width} ${height}" xmlns="http://www.w3.org/2000/svg">
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${regionSvg}
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</svg>
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`);
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}
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function buildLocalEditPrompt(regions: NormalizedLocalEditRegion[]) {
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const regionLines = regions
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.map((region) => {
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const left = Math.round(region.rect.x * 1000) / 10;
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const top = Math.round(region.rect.y * 1000) / 10;
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const width = Math.round(region.rect.width * 1000) / 10;
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const height = Math.round(region.rect.height * 1000) / 10;
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const referenceNote =
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region.referenceImages.length > 0
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? `；该区域有 ${region.referenceImages.length} 张专属参考图，依次为后续输入图片中的“区域 ${region.index} 参考图”，只可用于该区域`
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: "";
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return `区域 ${region.index}（原图位置 x=${left}%，y=${top}%，w=${width}%，h=${height}%${referenceNote}）：${region.prompt}`;
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})
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.join("\n");
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const referenceLines = regions
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.flatMap((region) =>
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region.referenceImages.map(
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(reference, referenceIndex) =>
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`区域 ${region.index} 参考图 ${referenceIndex + 1}：${reference.name || "未命名参考图"}，只能影响区域 ${region.index}`
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)
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)
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.join("\n");
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return [
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"输入图片1是原始干净图，也是最终输出必须继承的唯一画面基底。",
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"系统已根据用户框选区域计算出下方每个区域的原图相对坐标；彩色框只存在于产品界面里，不会作为最终画面内容。",
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"输入图片2及之后如存在，是各区域专属参考图；专属参考图只服务于对应区域，不得改变其它区域或整张图的主体身份。",
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"最终结果必须保持输入图片1的原始画幅比例和构图边界，不要把画面压扁、拉伸、加白边或改成方图。",
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"请不要凭空生成任何彩色框、蓝框、绿框、红框、矩形边框、编号圆点、提示词气泡、边框线、半透明色块或标注文字。",
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"",
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"请严格根据每个区域下方的提示词，只在对应坐标区域附近完成局部编辑：",
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regionLines,
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referenceLines ? `\n区域专属参考图说明：\n${referenceLines}` : "",
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"",
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"最终输出必须是干净照片：不得出现任何彩色框、蓝框、绿框、红框、矩形边框、编号、提示词气泡、标注文字或 UI 元素。",
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"未被列为编辑区域的画面必须尽量保持原图不变。",
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"新增内容必须匹配原图的透视、光线、比例、清晰度、色温和真实摄影风格。",
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"如果某个区域提示词与原图空间冲突，以自然融入原图为最高优先级。",
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].join("\n");
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}
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export async function POST(request: NextRequest) {
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try {
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const session = await auth();
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if (!session?.user?.id) {
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return NextResponse.json({ success: false, error: "未授权，请先登录" }, { status: 401 });
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}
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const body = (await request.json()) as LocalEditRequest;
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const rawSourceImageUrl = String(body.sourceImageUrl || "").trim();
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if (!rawSourceImageUrl) {
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return NextResponse.json({ success: false, error: "缺少 sourceImageUrl 参数" }, { status: 400 });
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}
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const sourceImageUrl = new URL(rawSourceImageUrl, request.url).toString();
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const sourceBuffer = await sharp(await fetchImageBufferFromUrl(sourceImageUrl), {
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failOn: "none",
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})
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.rotate()
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.toBuffer();
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const sourceMetadata = await sharp(sourceBuffer, { failOn: "none" }).metadata();
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const sourceWidth = Number(sourceMetadata.width || 0);
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const sourceHeight = Number(sourceMetadata.height || 0);
|
||
if (sourceWidth <= 0 || sourceHeight <= 0) {
|
||
return NextResponse.json({ success: false, error: "无法识别原图尺寸" }, { status: 400 });
|
||
}
|
||
|
||
let regions: NormalizedLocalEditRegion[];
|
||
try {
|
||
regions = normalizeRegions(body.regions, sourceWidth, sourceHeight);
|
||
} catch (validationError) {
|
||
return NextResponse.json(
|
||
{
|
||
success: false,
|
||
error:
|
||
validationError instanceof Error
|
||
? validationError.message
|
||
: "局部编辑区域参数无效",
|
||
},
|
||
{ status: 400 }
|
||
);
|
||
}
|
||
|
||
const pointsConfig = await getPointsSystemConfig();
|
||
const pointsCharge = await prepareFeaturePointsCharge({
|
||
userId: session.user.id,
|
||
unitCost: getImageToolCreditCost(pointsConfig, "repaint"),
|
||
reason: "image_repaint",
|
||
modelId: "canvas-local-edit",
|
||
note: "局部编辑消耗积分",
|
||
pointsConfig,
|
||
});
|
||
if (!pointsCharge.ok) {
|
||
return NextResponse.json(pointsCharge.payload, { status: pointsCharge.status });
|
||
}
|
||
|
||
const annotationSvg = buildAnnotationSvg({
|
||
height: sourceHeight,
|
||
regions,
|
||
width: sourceWidth,
|
||
});
|
||
const annotatedBuffer = await sharp(sourceBuffer, { failOn: "none" })
|
||
.composite([{ input: annotationSvg, left: 0, top: 0 }])
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
const annotatedFilename = `canvas-local-edit-${Date.now()}-${Math.random().toString(36).slice(2, 8)}.png`;
|
||
const annotatedUpload = await uploadFile(
|
||
annotatedFilename,
|
||
toArrayBuffer(annotatedBuffer)
|
||
);
|
||
const prompt = buildLocalEditPrompt(regions);
|
||
const regionReferenceImageUrls = regions.flatMap((region) =>
|
||
region.referenceImages.map((reference) => reference.url)
|
||
);
|
||
const resolvedAspectRatio = resolveLocalEditAspectRatio(
|
||
body.aspectRatio,
|
||
sourceWidth,
|
||
sourceHeight
|
||
);
|
||
|
||
const imageRequest: CanvasGenerateImageRequest = {
|
||
aspectRatio: resolvedAspectRatio,
|
||
billingFeature: "repaint",
|
||
debugLabel: "canvas-local-edit",
|
||
debugMeta: {
|
||
annotatedReferenceUrl: annotatedUpload.url,
|
||
annotatedReferenceSentToModel: false,
|
||
resolvedAspectRatio,
|
||
regionReferenceImageCount: regionReferenceImageUrls.length,
|
||
regionCount: regions.length,
|
||
sourceHeight,
|
||
sourceNodeId: body.sourceNodeId || null,
|
||
sourceWidth,
|
||
},
|
||
imageCount: 1,
|
||
imageSize:
|
||
typeof body.imageSize === "string" && body.imageSize.trim()
|
||
? body.imageSize.trim()
|
||
: "2K",
|
||
model:
|
||
typeof body.model === "string" && body.model.trim()
|
||
? body.model.trim()
|
||
: undefined,
|
||
negativePrompt:
|
||
"彩色框、蓝色边框、绿色边框、红色边框、橙色边框、矩形框、编号圆点、提示词气泡、标注文字、UI 控件、半透明色块、选区边框、白边、画幅压扁、画面拉伸",
|
||
prompt,
|
||
promptExtend: false,
|
||
referenceImages: [
|
||
sourceImageUrl,
|
||
...regionReferenceImageUrls,
|
||
],
|
||
ownerKey: session.user.id,
|
||
};
|
||
|
||
const task = await createCanvasImageTask({
|
||
request: imageRequest as unknown as Record<string, unknown>,
|
||
userId: session.user.id,
|
||
});
|
||
await enqueueCanvasImageTask(task.id);
|
||
const currentTask = await getCanvasImageTaskForUser({
|
||
taskId: task.id,
|
||
userId: session.user.id,
|
||
});
|
||
|
||
if (pointsCharge.chargeable) {
|
||
try {
|
||
await pointsCharge.consume({
|
||
note: `局部编辑消耗积分（${task.id}）`,
|
||
});
|
||
} catch (pointsError) {
|
||
console.error("[Points] Failed to consume local edit points:", pointsError);
|
||
}
|
||
}
|
||
|
||
return NextResponse.json({
|
||
success: true,
|
||
annotatedReferenceUrl: annotatedUpload.url,
|
||
aspectRatio: resolvedAspectRatio,
|
||
prompt,
|
||
regions,
|
||
sourceHeight,
|
||
sourceWidth,
|
||
taskId: task.id,
|
||
status: currentTask?.status || task.status,
|
||
queueStatus: currentTask?.queueStatus,
|
||
});
|
||
} catch (error) {
|
||
console.error("[Canvas Local Edit] Error:", error);
|
||
return NextResponse.json(
|
||
{
|
||
success: false,
|
||
error: error instanceof Error ? error.message : "局部编辑提交失败",
|
||
},
|
||
{ status: 500 }
|
||
);
|
||
}
|
||
}
|