1489 lines
60 KiB
TypeScript
1489 lines
60 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 {
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getEnabledAiModelsWithProvider,
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getPointsSystemConfig,
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getSiteSettings,
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} 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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targetRect?: 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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operation?: string;
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scalePercent?: number;
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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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targetRect?: {
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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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} | null;
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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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targetPixelRect?: {
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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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} | null;
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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 MAX_SCALE_ADJUST_CROP_REFERENCES = 4;
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const SCALE_ADJUST_CROP_PADDING_RATIO = 0.18;
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const SCALE_ADJUST_CROP_MAX_EDGE = 1536;
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const SCALE_ADJUST_FAL_MOCKUP_PADDING_RATIO = 0.04;
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const SCALE_ADJUST_FAL_MOCKUP_BLUR_PX = 38;
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const MIN_REGION_EDGE_PX = 24;
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const SCALE_ADJUST_OPERATION = "scale-adjust";
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type LocalEditOperation = "local-edit" | typeof SCALE_ADJUST_OPERATION;
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const MIN_SCALE_ADJUST_PERCENT = -80;
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const MAX_SCALE_ADJUST_PERCENT = 200;
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type ScaleAdjustPercent = number;
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type ScaleAdjustCropReference = {
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regionIndex: number;
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url: string;
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};
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type AiModelWithProviderForSelection = Awaited<
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ReturnType<typeof getEnabledAiModelsWithProvider>
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>[number];
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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 findModelSelectionEntry(
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models: AiModelWithProviderForSelection[],
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modelRef: string
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) {
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const normalizedRef = String(modelRef || "").trim();
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if (!normalizedRef) return null;
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return (
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models.find(
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(entry) =>
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entry.model.id === normalizedRef || entry.model.modelId === normalizedRef
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) || null
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);
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}
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function isScaleAdjustDedicatedDetailModel(
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entry: AiModelWithProviderForSelection | null | undefined
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) {
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if (!entry?.model?.supportsImageGen || entry.model.supportsVision === false) {
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return false;
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}
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const label = `${entry.model.displayName || ""} ${entry.model.modelId || ""}`
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.toLowerCase()
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.replace(/\s+/g, "");
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return label.includes("详情专线");
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}
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function isFalImageModelEntry(
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entry: AiModelWithProviderForSelection | null | undefined
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) {
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return entry?.provider?.type === "fal-image";
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}
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function resolveScaleAdjustPreferredModelId(params: {
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configuredModelId: string;
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requestedModelId: string;
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models: AiModelWithProviderForSelection[];
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}) {
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const requestedModel = findModelSelectionEntry(
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params.models,
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params.requestedModelId
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);
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if (isScaleAdjustDedicatedDetailModel(requestedModel)) {
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return requestedModel?.model.id || params.requestedModelId;
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}
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const configuredModel = findModelSelectionEntry(
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params.models,
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params.configuredModelId
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);
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if (isScaleAdjustDedicatedDetailModel(configuredModel)) {
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return configuredModel?.model.id || params.configuredModelId;
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}
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const autoDetailModel = params.models.find(isScaleAdjustDedicatedDetailModel);
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if (autoDetailModel) {
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return autoDetailModel.model.id;
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}
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return params.configuredModelId || params.requestedModelId;
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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 resolveLocalEditOperation(input: unknown) {
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return String(input || "").trim() === SCALE_ADJUST_OPERATION
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? SCALE_ADJUST_OPERATION
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: "local-edit";
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}
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function normalizeScaleAdjustPercent(input: unknown): ScaleAdjustPercent {
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const value = Math.round(Number(input));
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if (
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Number.isFinite(value) &&
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value !== 0 &&
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value >= MIN_SCALE_ADJUST_PERCENT &&
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value <= MAX_SCALE_ADJUST_PERCENT
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) {
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return value;
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}
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throw new Error("请选择有效的比例调整幅度");
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}
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function buildLocalEditDisplayPrompt(params: {
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operation: LocalEditOperation;
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scalePercent: ScaleAdjustPercent | null;
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}) {
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if (params.operation === SCALE_ADJUST_OPERATION) {
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return "比例调整：按目标框调整";
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}
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return "局部编辑处理";
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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 scaleRectAroundCenter(
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rect: NormalizedLocalEditRegion["rect"],
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scalePercent: ScaleAdjustPercent
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) {
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const requestedScale = Math.max(0.1, 1 + scalePercent / 100);
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const maxUniformScale = Math.max(
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0.1,
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Math.min(
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rect.width > 0 ? 1 / rect.width : requestedScale,
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rect.height > 0 ? 1 / rect.height : requestedScale
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)
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);
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const scale = Math.min(requestedScale, maxUniformScale);
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const targetWidth = Math.min(1, rect.width * scale);
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const targetHeight = Math.min(1, rect.height * scale);
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const centerX = rect.x + rect.width / 2;
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const centerY = rect.y + rect.height / 2;
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const x = clamp(centerX - targetWidth / 2, 0, Math.max(0, 1 - targetWidth));
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const y = clamp(centerY - targetHeight / 2, 0, Math.max(0, 1 - targetHeight));
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return {
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x,
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y,
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width: targetWidth,
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height: targetHeight,
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};
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}
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function getScaleAdjustTargetRect(
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region: NormalizedLocalEditRegion,
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scalePercent?: ScaleAdjustPercent | null
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) {
|
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if (region.targetRect) return region.targetRect;
|
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if (typeof scalePercent === "number" && Number.isFinite(scalePercent)) {
|
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return scaleRectAroundCenter(region.rect, scalePercent);
|
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}
|
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return region.rect;
|
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}
|
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|
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function expandRectWithMargins(
|
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rect: NormalizedLocalEditRegion["rect"],
|
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marginX: number,
|
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marginY: number
|
||
) {
|
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const left = clamp(rect.x - marginX, 0, 1);
|
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const top = clamp(rect.y - marginY, 0, 1);
|
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const right = clamp(rect.x + rect.width + marginX, left + 0.001, 1);
|
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const bottom = clamp(rect.y + rect.height + marginY, top + 0.001, 1);
|
||
|
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return {
|
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x: left,
|
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y: top,
|
||
width: Math.max(0.001, right - left),
|
||
height: Math.max(0.001, bottom - top),
|
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};
|
||
}
|
||
|
||
function getRectUnion(
|
||
leftRect: NormalizedLocalEditRegion["rect"],
|
||
rightRect: NormalizedLocalEditRegion["rect"]
|
||
) {
|
||
const left = Math.min(leftRect.x, rightRect.x);
|
||
const top = Math.min(leftRect.y, rightRect.y);
|
||
const right = Math.max(
|
||
leftRect.x + leftRect.width,
|
||
rightRect.x + rightRect.width
|
||
);
|
||
const bottom = Math.max(
|
||
leftRect.y + leftRect.height,
|
||
rightRect.y + rightRect.height
|
||
);
|
||
return {
|
||
x: clamp(left, 0, 1),
|
||
y: clamp(top, 0, 1),
|
||
width: Math.max(0.001, clamp(right, 0, 1) - clamp(left, 0, 1)),
|
||
height: Math.max(0.001, clamp(bottom, 0, 1) - clamp(top, 0, 1)),
|
||
};
|
||
}
|
||
|
||
function rectsDifferMeaningfully(
|
||
leftRect: NormalizedLocalEditRegion["rect"],
|
||
rightRect: NormalizedLocalEditRegion["rect"],
|
||
epsilon = 0.0005
|
||
) {
|
||
return (
|
||
Math.abs(leftRect.x - rightRect.x) > epsilon ||
|
||
Math.abs(leftRect.y - rightRect.y) > epsilon ||
|
||
Math.abs(leftRect.width - rightRect.width) > epsilon ||
|
||
Math.abs(leftRect.height - rightRect.height) > epsilon
|
||
);
|
||
}
|
||
|
||
function getScaleAdjustWorkspaceRect(
|
||
sourceRect: NormalizedLocalEditRegion["rect"],
|
||
targetRect: NormalizedLocalEditRegion["rect"],
|
||
scalePercent?: ScaleAdjustPercent | null
|
||
) {
|
||
const sourceWidth = Math.max(0.0001, sourceRect.width);
|
||
const sourceHeight = Math.max(0.0001, sourceRect.height);
|
||
const widthDeltaRatio = Math.abs(targetRect.width / sourceWidth - 1);
|
||
const heightDeltaRatio = Math.abs(targetRect.height / sourceHeight - 1);
|
||
const areaDeltaRatio = Math.abs(
|
||
Math.sqrt(
|
||
Math.max(0.0001, targetRect.width * targetRect.height) /
|
||
Math.max(0.0001, sourceWidth * sourceHeight)
|
||
) - 1
|
||
);
|
||
const sourceCenterX = sourceRect.x + sourceRect.width / 2;
|
||
const sourceCenterY = sourceRect.y + sourceRect.height / 2;
|
||
const targetCenterX = targetRect.x + targetRect.width / 2;
|
||
const targetCenterY = targetRect.y + targetRect.height / 2;
|
||
const movementRatioX = Math.abs(targetCenterX - sourceCenterX) / sourceWidth;
|
||
const movementRatioY = Math.abs(targetCenterY - sourceCenterY) / sourceHeight;
|
||
const explicitChangeRatio = Math.max(
|
||
widthDeltaRatio,
|
||
heightDeltaRatio,
|
||
areaDeltaRatio,
|
||
movementRatioX,
|
||
movementRatioY
|
||
);
|
||
const fallbackScaleRatio =
|
||
typeof scalePercent === "number" && Number.isFinite(scalePercent)
|
||
? Math.min(1, Math.abs(scalePercent) / 100)
|
||
: 0;
|
||
const changeRatio = Math.max(explicitChangeRatio, fallbackScaleRatio);
|
||
const unionRect = getRectUnion(sourceRect, targetRect);
|
||
if (changeRatio <= 0 && !rectsDifferMeaningfully(unionRect, targetRect)) {
|
||
return targetRect;
|
||
}
|
||
|
||
const marginX = Math.min(
|
||
0.16,
|
||
Math.max(
|
||
0.018,
|
||
unionRect.width * 0.04,
|
||
sourceRect.width * changeRatio * 0.24
|
||
)
|
||
);
|
||
const marginY = Math.min(
|
||
0.16,
|
||
Math.max(
|
||
0.018,
|
||
unionRect.height * 0.04,
|
||
sourceRect.height * changeRatio * 0.24
|
||
)
|
||
);
|
||
|
||
return expandRectWithMargins(unionRect, marginX, marginY);
|
||
}
|
||
|
||
function buildScaleAdjustCompositeRegions(
|
||
regions: NormalizedLocalEditRegion[],
|
||
scalePercent?: ScaleAdjustPercent | null
|
||
) {
|
||
return regions.flatMap((region) => {
|
||
const targetRect = getScaleAdjustTargetRect(region, scalePercent);
|
||
const workspaceRect = getScaleAdjustWorkspaceRect(
|
||
region.rect,
|
||
targetRect,
|
||
scalePercent
|
||
);
|
||
return rectsDifferMeaningfully(workspaceRect, targetRect) &&
|
||
rectsDifferMeaningfully(workspaceRect, region.rect)
|
||
? [region.rect, targetRect, workspaceRect]
|
||
: [region.rect, targetRect];
|
||
});
|
||
}
|
||
|
||
function expandPixelBox(params: {
|
||
amount: number;
|
||
box: NormalizedLocalEditRegion["pixelRect"];
|
||
height: number;
|
||
width: number;
|
||
}) {
|
||
const { amount, box, height, width } = params;
|
||
const left = clamp(box.left - amount, 0, Math.max(0, width - 1));
|
||
const top = clamp(box.top - amount, 0, Math.max(0, height - 1));
|
||
const right = clamp(box.left + box.width + amount, left + 1, width);
|
||
const bottom = clamp(box.top + box.height + amount, top + 1, height);
|
||
|
||
return {
|
||
left,
|
||
top,
|
||
width: Math.max(1, right - left),
|
||
height: Math.max(1, bottom - top),
|
||
};
|
||
}
|
||
|
||
async function createFeatherAlphaMask(params: {
|
||
width: number;
|
||
height: number;
|
||
feather: number;
|
||
inset: number;
|
||
}) {
|
||
const { width, height } = params;
|
||
const feather = Math.max(1, Math.round(params.feather));
|
||
const maxInset = Math.max(1, Math.floor(Math.min(width, height) * 0.42));
|
||
const inset = clamp(Math.round(params.inset), 1, maxInset);
|
||
const innerWidth = Math.max(1, width - inset * 2);
|
||
const innerHeight = Math.max(1, height - inset * 2);
|
||
const svg = Buffer.from(`
|
||
<svg width="${width}" height="${height}" viewBox="0 0 ${width} ${height}" xmlns="http://www.w3.org/2000/svg">
|
||
<defs>
|
||
<filter id="soft"><feGaussianBlur stdDeviation="${feather}" /></filter>
|
||
</defs>
|
||
<rect x="${inset}" y="${inset}" width="${innerWidth}" height="${innerHeight}" fill="#fff" filter="url(#soft)" />
|
||
</svg>
|
||
`);
|
||
|
||
return sharp(svg, { failOn: "none" })
|
||
.resize(width, height, { fit: "fill" })
|
||
.removeAlpha()
|
||
.greyscale()
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
}
|
||
|
||
async function addFeatherAlpha(params: {
|
||
buffer: Buffer;
|
||
width: number;
|
||
height: number;
|
||
feather: number;
|
||
inset: number;
|
||
}) {
|
||
const mask = await createFeatherAlphaMask({
|
||
feather: params.feather,
|
||
height: params.height,
|
||
inset: params.inset,
|
||
width: params.width,
|
||
});
|
||
|
||
return sharp(params.buffer, { failOn: "none" })
|
||
.resize(params.width, params.height, { fit: "fill" })
|
||
.removeAlpha()
|
||
.joinChannel(mask)
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
}
|
||
|
||
async function buildScaleAdjustFalTargetMockup(params: {
|
||
sourceBuffer: Buffer;
|
||
sourceHeight: number;
|
||
sourceWidth: number;
|
||
regions: NormalizedLocalEditRegion[];
|
||
scalePercent?: ScaleAdjustPercent | null;
|
||
}) {
|
||
const { sourceBuffer, sourceHeight, sourceWidth, regions, scalePercent } = params;
|
||
const minSide = Math.max(1, Math.min(sourceWidth, sourceHeight));
|
||
const composites: sharp.OverlayOptions[] = [];
|
||
|
||
for (const region of regions) {
|
||
const targetRect = getScaleAdjustTargetRect(region, scalePercent);
|
||
const targetPixelRect =
|
||
region.targetPixelRect || rectToPixels(targetRect, sourceWidth, sourceHeight);
|
||
const workspaceRect = getScaleAdjustWorkspaceRect(
|
||
region.rect,
|
||
targetRect,
|
||
scalePercent
|
||
);
|
||
const workspacePixelRect = expandPixelBox({
|
||
amount: Math.round(minSide * SCALE_ADJUST_FAL_MOCKUP_PADDING_RATIO),
|
||
box: rectToPixels(workspaceRect, sourceWidth, sourceHeight),
|
||
height: sourceHeight,
|
||
width: sourceWidth,
|
||
});
|
||
|
||
const blurredWorkspace = await sharp(sourceBuffer, { failOn: "none" })
|
||
.extract(workspacePixelRect)
|
||
.blur(SCALE_ADJUST_FAL_MOCKUP_BLUR_PX)
|
||
.modulate({ brightness: 1.05, saturation: 0.86 })
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
const workspaceFeather = Math.max(
|
||
18,
|
||
Math.round(Math.min(workspacePixelRect.width, workspacePixelRect.height) * 0.1)
|
||
);
|
||
const featheredWorkspace = await addFeatherAlpha({
|
||
buffer: blurredWorkspace,
|
||
feather: workspaceFeather,
|
||
height: workspacePixelRect.height,
|
||
inset: Math.max(workspaceFeather * 2.6, workspaceFeather + 1),
|
||
width: workspacePixelRect.width,
|
||
});
|
||
|
||
const subjectCrop = await sharp(sourceBuffer, { failOn: "none" })
|
||
.extract(region.pixelRect)
|
||
.resize(targetPixelRect.width, targetPixelRect.height, {
|
||
fit: "cover",
|
||
position: "center",
|
||
})
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
const subjectFeather = Math.max(
|
||
8,
|
||
Math.round(Math.min(targetPixelRect.width, targetPixelRect.height) * 0.08)
|
||
);
|
||
const featheredSubject = await addFeatherAlpha({
|
||
buffer: subjectCrop,
|
||
feather: subjectFeather,
|
||
height: targetPixelRect.height,
|
||
inset: Math.max(subjectFeather * 1.6, subjectFeather + 1),
|
||
width: targetPixelRect.width,
|
||
});
|
||
|
||
composites.push(
|
||
{
|
||
input: featheredWorkspace,
|
||
left: workspacePixelRect.left,
|
||
top: workspacePixelRect.top,
|
||
},
|
||
{
|
||
input: featheredSubject,
|
||
left: targetPixelRect.left,
|
||
top: targetPixelRect.top,
|
||
}
|
||
);
|
||
}
|
||
|
||
return sharp(sourceBuffer, { failOn: "none" })
|
||
.composite(composites)
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
}
|
||
|
||
function expandPixelRectForCrop(params: {
|
||
height: number;
|
||
pixelRect: NormalizedLocalEditRegion["pixelRect"];
|
||
width: number;
|
||
}) {
|
||
const { height, pixelRect, width } = params;
|
||
const padX = Math.round(pixelRect.width * SCALE_ADJUST_CROP_PADDING_RATIO);
|
||
const padY = Math.round(pixelRect.height * SCALE_ADJUST_CROP_PADDING_RATIO);
|
||
const left = clamp(pixelRect.left - padX, 0, Math.max(0, width - 1));
|
||
const top = clamp(pixelRect.top - padY, 0, Math.max(0, height - 1));
|
||
const right = clamp(
|
||
pixelRect.left + pixelRect.width + padX,
|
||
left + 1,
|
||
width
|
||
);
|
||
const bottom = clamp(
|
||
pixelRect.top + pixelRect.height + padY,
|
||
top + 1,
|
||
height
|
||
);
|
||
|
||
return {
|
||
left,
|
||
top,
|
||
width: Math.max(1, right - left),
|
||
height: Math.max(1, bottom - top),
|
||
};
|
||
}
|
||
|
||
async function createScaleAdjustCropReferences(params: {
|
||
regions: NormalizedLocalEditRegion[];
|
||
sourceBuffer: Buffer;
|
||
sourceHeight: number;
|
||
sourceWidth: number;
|
||
}): Promise<ScaleAdjustCropReference[]> {
|
||
const references: ScaleAdjustCropReference[] = [];
|
||
const regionsForCrop = params.regions.slice(0, MAX_SCALE_ADJUST_CROP_REFERENCES);
|
||
|
||
for (const region of regionsForCrop) {
|
||
const cropBox = expandPixelRectForCrop({
|
||
height: params.sourceHeight,
|
||
pixelRect: region.pixelRect,
|
||
width: params.sourceWidth,
|
||
});
|
||
const cropBuffer = await sharp(params.sourceBuffer, { failOn: "none" })
|
||
.extract(cropBox)
|
||
.resize({
|
||
fit: "inside",
|
||
height: SCALE_ADJUST_CROP_MAX_EDGE,
|
||
withoutEnlargement: true,
|
||
width: SCALE_ADJUST_CROP_MAX_EDGE,
|
||
})
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
const upload = await uploadFile(
|
||
`canvas-scale-adjust-crop-r${region.index}-${Date.now()}-${Math.random()
|
||
.toString(36)
|
||
.slice(2, 8)}.png`,
|
||
toArrayBuffer(cropBuffer)
|
||
);
|
||
references.push({
|
||
regionIndex: region.index,
|
||
url: upload.url,
|
||
});
|
||
}
|
||
|
||
return references;
|
||
}
|
||
|
||
function wrapText(text: string, maxChars: number, maxLines = 3) {
|
||
const compact = text.replace(/\s+/g, " ").trim();
|
||
if (!compact) return [];
|
||
const lines: string[] = [];
|
||
let remaining = compact;
|
||
while (remaining.length > 0 && lines.length < maxLines) {
|
||
if (remaining.length <= maxChars) {
|
||
lines.push(remaining);
|
||
break;
|
||
}
|
||
lines.push(remaining.slice(0, maxChars));
|
||
remaining = remaining.slice(maxChars);
|
||
}
|
||
if (remaining.length > 0 && lines.length >= maxLines) {
|
||
lines[lines.length - 1] = `${lines[lines.length - 1].slice(0, Math.max(1, maxChars - 1))}…`;
|
||
}
|
||
return lines;
|
||
}
|
||
|
||
function normalizeRegions(
|
||
rawRegions: LocalEditRegionInput[] | undefined,
|
||
sourceWidth: number,
|
||
sourceHeight: number,
|
||
options: { requirePrompt?: boolean; fallbackPrompt?: string } = {}
|
||
): NormalizedLocalEditRegion[] {
|
||
if (!Array.isArray(rawRegions) || rawRegions.length === 0) {
|
||
throw new Error("请先框选至少一个局部编辑区域");
|
||
}
|
||
if (rawRegions.length > MAX_LOCAL_EDIT_REGIONS) {
|
||
throw new Error(`局部编辑最多支持 ${MAX_LOCAL_EDIT_REGIONS} 个区域`);
|
||
}
|
||
|
||
return rawRegions.map((region, itemIndex) => {
|
||
const rect = normalizeRect(region.rect);
|
||
if (!rect) {
|
||
throw new Error(`区域 ${itemIndex + 1} 缺少有效框选范围`);
|
||
}
|
||
const targetRect = normalizeRect(region.targetRect);
|
||
const prompt = String(region.prompt || "").trim();
|
||
const resolvedPrompt = prompt || String(options.fallbackPrompt || "").trim();
|
||
if (options.requirePrompt !== false && !resolvedPrompt) {
|
||
throw new Error(`区域 ${itemIndex + 1} 请填写局部编辑提示词`);
|
||
}
|
||
const pixelRect = rectToPixels(rect, sourceWidth, sourceHeight);
|
||
const targetPixelRect = targetRect
|
||
? rectToPixels(targetRect, sourceWidth, sourceHeight)
|
||
: null;
|
||
if (pixelRect.width < MIN_REGION_EDGE_PX || pixelRect.height < MIN_REGION_EDGE_PX) {
|
||
throw new Error(`区域 ${itemIndex + 1} 过小，请重新框选更大的范围`);
|
||
}
|
||
const color = normalizeHexColor(
|
||
region.color,
|
||
DEFAULT_REGION_COLORS[itemIndex % DEFAULT_REGION_COLORS.length]
|
||
);
|
||
return {
|
||
id: String(region.id || `region-${itemIndex + 1}`),
|
||
index: itemIndex + 1,
|
||
color,
|
||
colorName: getColorName(color),
|
||
prompt: resolvedPrompt.slice(0, 300),
|
||
referenceImages: normalizeRegionReferenceImages(region, itemIndex),
|
||
rect,
|
||
targetRect,
|
||
pixelRect,
|
||
targetPixelRect,
|
||
};
|
||
});
|
||
}
|
||
|
||
function buildAnnotationSvg(params: {
|
||
width: number;
|
||
height: number;
|
||
regions: NormalizedLocalEditRegion[];
|
||
hidePromptText?: boolean;
|
||
}) {
|
||
const { width, height, regions } = params;
|
||
const minSide = Math.max(1, Math.min(width, height));
|
||
const strokeWidth = Math.max(4, Math.round(minSide * 0.006));
|
||
const fontSize = Math.max(24, Math.round(minSide * 0.026));
|
||
const smallFontSize = Math.max(18, Math.round(fontSize * 0.72));
|
||
const padX = Math.round(fontSize * 0.55);
|
||
const padY = Math.round(fontSize * 0.34);
|
||
const gap = Math.round(fontSize * 0.34);
|
||
const radius = Math.round(fontSize * 0.5);
|
||
|
||
const regionSvg = regions
|
||
.map((region) => {
|
||
const { left, top, width: rectWidth, height: rectHeight } = region.pixelRect;
|
||
const labelText = params.hidePromptText
|
||
? `区域${region.index} 目标主体`
|
||
: `区域${region.index} ${region.prompt}`;
|
||
const maxChars = Math.max(8, Math.min(24, Math.floor((width * 0.42) / Math.max(1, fontSize * 0.58))));
|
||
const lines = wrapText(labelText, maxChars, 3);
|
||
const labelWidth = Math.min(
|
||
Math.max(
|
||
rectWidth,
|
||
...lines.map((line) => Math.ceil(line.length * fontSize * 0.62) + padX * 2)
|
||
),
|
||
Math.max(180, width - 16)
|
||
);
|
||
const labelHeight = lines.length * Math.round(fontSize * 1.24) + padY * 2;
|
||
const preferBelow = top + rectHeight + gap + labelHeight <= height - 8;
|
||
const labelX = clamp(left, 8, Math.max(8, width - labelWidth - 8));
|
||
const labelY = preferBelow
|
||
? top + rectHeight + gap
|
||
: clamp(top - gap - labelHeight, 8, Math.max(8, height - labelHeight - 8));
|
||
const badgeSize = Math.max(34, Math.round(fontSize * 1.35));
|
||
const badgeCx = clamp(left, badgeSize / 2 + 6, width - badgeSize / 2 - 6);
|
||
const badgeCy = clamp(top, badgeSize / 2 + 6, height - badgeSize / 2 - 6);
|
||
const textLines = lines
|
||
.map(
|
||
(line, lineIndex) =>
|
||
`<text x="${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">${escapeXml(line)}</text>`
|
||
)
|
||
.join("");
|
||
|
||
return `
|
||
<rect x="${left}" y="${top}" width="${rectWidth}" height="${rectHeight}" rx="${radius}" fill="none" stroke="${region.color}" stroke-width="${strokeWidth}" />
|
||
<rect x="${left}" y="${top}" width="${rectWidth}" height="${rectHeight}" rx="${radius}" fill="${region.color}" opacity="0.08" />
|
||
<circle cx="${badgeCx}" cy="${badgeCy}" r="${badgeSize / 2}" fill="${region.color}" stroke="#ffffff" stroke-width="${Math.max(2, Math.round(strokeWidth * 0.45))}" />
|
||
<text x="${badgeCx}" y="${badgeCy + smallFontSize * 0.38}" text-anchor="middle" fill="#ffffff" font-size="${smallFontSize}" font-family="Arial, Helvetica, sans-serif" font-weight="800">${region.index}</text>
|
||
<rect x="${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))}" />
|
||
${textLines}
|
||
`;
|
||
})
|
||
.join("");
|
||
|
||
return Buffer.from(`
|
||
<svg width="${width}" height="${height}" viewBox="0 0 ${width} ${height}" xmlns="http://www.w3.org/2000/svg">
|
||
${regionSvg}
|
||
</svg>
|
||
`);
|
||
}
|
||
|
||
function buildScaleAdjustAnnotationSvg(params: {
|
||
width: number;
|
||
height: number;
|
||
regions: NormalizedLocalEditRegion[];
|
||
scalePercent?: ScaleAdjustPercent | null;
|
||
}) {
|
||
const { width, height, regions, scalePercent } = params;
|
||
const minSide = Math.max(1, Math.min(width, height));
|
||
const strokeWidth = Math.max(2, Math.round(minSide * 0.0034));
|
||
const targetColor = "#111827";
|
||
const sourceColor = "#9ca3af";
|
||
|
||
const regionSvg = regions
|
||
.map((region) => {
|
||
const source = region.pixelRect;
|
||
const targetRect = getScaleAdjustTargetRect(region, scalePercent);
|
||
const target =
|
||
region.targetPixelRect || rectToPixels(targetRect, width, height);
|
||
const radius = Math.max(8, Math.round(strokeWidth * 2));
|
||
|
||
return `
|
||
<rect x="${source.left}" y="${source.top}" width="${source.width}" height="${source.height}" rx="${radius}" fill="none" stroke="${sourceColor}" stroke-width="${strokeWidth}" opacity="0.82" />
|
||
<rect x="${target.left}" y="${target.top}" width="${target.width}" height="${target.height}" rx="${radius}" fill="none" stroke="${targetColor}" stroke-width="${Math.max(2, Math.round(strokeWidth * 1.08))}" opacity="0.88" />
|
||
`;
|
||
})
|
||
.join("");
|
||
|
||
return Buffer.from(`
|
||
<svg width="${width}" height="${height}" viewBox="0 0 ${width} ${height}" xmlns="http://www.w3.org/2000/svg">
|
||
<rect x="0" y="0" width="${width}" height="${height}" fill="#f5f7fb" />
|
||
<rect x="${Math.max(1, strokeWidth / 2)}" y="${Math.max(1, strokeWidth / 2)}" width="${Math.max(1, width - strokeWidth)}" height="${Math.max(1, height - strokeWidth)}" fill="none" stroke="#d9dee8" stroke-width="${Math.max(1, Math.round(strokeWidth * 0.55))}" />
|
||
${regionSvg}
|
||
</svg>
|
||
`);
|
||
}
|
||
|
||
function buildLocalEditPrompt(regions: NormalizedLocalEditRegion[]) {
|
||
const regionLines = regions
|
||
.map((region) => {
|
||
const left = Math.round(region.rect.x * 1000) / 10;
|
||
const top = Math.round(region.rect.y * 1000) / 10;
|
||
const width = Math.round(region.rect.width * 1000) / 10;
|
||
const height = Math.round(region.rect.height * 1000) / 10;
|
||
const referenceNote =
|
||
region.referenceImages.length > 0
|
||
? `；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`
|
||
: "";
|
||
return `区域 ${region.index}（原图位置 x=${left}%，y=${top}%，w=${width}%，h=${height}%${referenceNote}）：${region.prompt}`;
|
||
})
|
||
.join("\n");
|
||
const referenceLines = regions
|
||
.flatMap((region) =>
|
||
region.referenceImages.map(
|
||
(reference, referenceIndex) =>
|
||
`区域 ${region.index} 参考图 ${referenceIndex + 1}：${reference.name || "未命名参考图"}，只能影响区域 ${region.index}`
|
||
)
|
||
)
|
||
.join("\n");
|
||
|
||
return [
|
||
"输入图片1是原始干净图，也是最终输出必须继承的唯一画面基底。",
|
||
"系统已根据用户框选区域计算出下方每个区域的原图相对坐标；彩色框只存在于产品界面里，不会作为最终画面内容。",
|
||
"输入图片2及之后如存在，是各区域专属参考图；专属参考图只服务于对应区域，不得改变其它区域或整张图的主体身份。",
|
||
"最终结果必须保持输入图片1的原始画幅比例和构图边界，不要把画面压扁、拉伸、加白边或改成方图。",
|
||
"请不要凭空生成任何彩色框、蓝框、绿框、红框、矩形边框、编号圆点、提示词气泡、边框线、半透明色块或标注文字。",
|
||
"",
|
||
"请严格根据每个区域下方的提示词，只在对应坐标区域附近完成局部编辑：",
|
||
regionLines,
|
||
referenceLines ? `\n区域专属参考图说明：\n${referenceLines}` : "",
|
||
"",
|
||
"新增主体完整性要求：如果区域提示词要求新增动物、人物、商品或其它完整主体，必须把该主体完整放在框选区域的安全内边距内，四周至少预留 8%-12% 缓冲空间；不要让头、身体、四肢、尾巴、产品边缘或阴影贴到选区边界，更不能被边界截断。空间不足时请主动缩小新增主体，而不是裁切主体。",
|
||
"边缘融合要求：编辑区域与未编辑区域的地面、墙面、桌面、椅脚、阴影、纹理和透视必须连续自然，不得出现错位、断层、硬边、矩形补丁、局部贴片或不同清晰度的边界。",
|
||
"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。",
|
||
"未被列为编辑区域的画面必须逐像素保持原图不变，不允许重绘、改色、补光、换材质、移动物体、改变清晰度或改变背景细节。",
|
||
"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。",
|
||
"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。",
|
||
].join("\n");
|
||
}
|
||
|
||
function buildScaleAdjustPrompt(
|
||
regions: NormalizedLocalEditRegion[],
|
||
scalePercent: ScaleAdjustPercent | null | undefined,
|
||
cropReferences: ScaleAdjustCropReference[] = [],
|
||
sourceSize?: { width: number; height: number }
|
||
) {
|
||
const sourceSizeLine = sourceSize
|
||
? `最终输出必须保持与输入图片1完全相同的画幅和像素尺寸：${sourceSize.width} x ${sourceSize.height} px。`
|
||
: "最终输出必须保持与输入图片1完全相同的画幅和像素尺寸。";
|
||
const regionLines = regions
|
||
.map((region) => {
|
||
const cropIndex = cropReferences.findIndex(
|
||
(reference) => reference.regionIndex === region.index
|
||
);
|
||
const targetRect = getScaleAdjustTargetRect(region, scalePercent);
|
||
const sourceCenterX = region.rect.x + region.rect.width / 2;
|
||
const sourceCenterY = region.rect.y + region.rect.height / 2;
|
||
const targetCenterX = targetRect.x + targetRect.width / 2;
|
||
const targetCenterY = targetRect.y + targetRect.height / 2;
|
||
const moved =
|
||
Math.hypot(targetCenterX - sourceCenterX, targetCenterY - sourceCenterY) >
|
||
0.01;
|
||
const targetPixelRect =
|
||
region.targetPixelRect ||
|
||
(sourceSize
|
||
? rectToPixels(targetRect, sourceSize.width, sourceSize.height)
|
||
: null);
|
||
const widthFactor =
|
||
region.rect.width > 0 ? targetRect.width / region.rect.width : 1;
|
||
const heightFactor =
|
||
region.rect.height > 0 ? targetRect.height / region.rect.height : 1;
|
||
const sourcePixelLine = `源框像素坐标：x=${region.pixelRect.left}, y=${region.pixelRect.top}, w=${region.pixelRect.width}, h=${region.pixelRect.height}`;
|
||
const targetPixelLine = targetPixelRect
|
||
? `目标框像素坐标：x=${targetPixelRect.left}, y=${targetPixelRect.top}, w=${targetPixelRect.width}, h=${targetPixelRect.height}`
|
||
: `目标框相对坐标：x=${Math.round(targetRect.x * 1000) / 10}%, y=${Math.round(targetRect.y * 1000) / 10}%, w=${Math.round(targetRect.width * 1000) / 10}%, h=${Math.round(targetRect.height * 1000) / 10}%`;
|
||
const scaleLine = `目标视觉占位约为原主体宽度的 ${widthFactor.toFixed(2)} 倍、高度的 ${heightFactor.toFixed(2)} 倍；执行时必须以等比主体缩放为准，不要拉伸主体去硬贴目标框。`;
|
||
const targetPositionNote = moved
|
||
? "目标框同时指定用户希望的最终目标大小和目标位置，目标主体调整后的视觉中心应移动到目标框中心附近。"
|
||
: "目标框指定用户希望的最终目标大小，目标主体调整后应围绕当前主体位置自然放置。";
|
||
const cropNote =
|
||
cropIndex >= 0
|
||
? `；输入图片${cropIndex + 3}是该区域的干净局部裁切参考图，只用于识别目标主体的身份、轮廓与原始比例`
|
||
: "";
|
||
return `区域 ${region.index}${cropNote}：请在输入图片1中找到源框范围内最主要、可独立调整的商品/物体主体。${sourcePixelLine}；${targetPixelLine}；${scaleLine}${targetPositionNote}源框只是“寻找主体”的范围，不是最终边界，也不是要缩放或贴回的矩形补丁。目标框只是主体调整后的视觉占位参考，不要求主体填满矩形，更不能改变主体自身宽高比、透视或形体。请像真实图片编辑一样先保留锁定的原始画布，再只把这个主体整体等比变大/变小/移动到目标视觉占位；主体缩放后露出或遮挡的极小背景区域需要自然重建。严禁把输入图片1整张图、输入图片2坐标图、任意裁切图、源框矩形区域或目标框矩形区域当成图片块整体缩放、平移、复制、裁切或贴回。如果源框中只覆盖到主体的一部分，请根据局部裁切参考和可见结构推断该主体的完整可见轮廓，只调整主体，不调整矩形框内背景。`;
|
||
})
|
||
.join("\n");
|
||
const cropLines = cropReferences
|
||
.map(
|
||
(reference, index) =>
|
||
`输入图片${index + 3}：区域 ${reference.regionIndex} 的原图干净局部裁切参考图，只用于确认要缩放的主体身份、轮廓和宽高比，不能当成输出底图，也不能把裁切图整体贴回。`
|
||
)
|
||
.join("\n");
|
||
|
||
return [
|
||
"这是一项局部主体比例 inpaint/edit 任务，不是整图缩放、整图裁切或重新构图任务。",
|
||
sourceSizeLine,
|
||
"输入图片1是原始干净图，也是最终输出必须继承的唯一画面基底。除目标主体尺寸变化与必要背景补全外，输入图片1中的文字、Logo、装饰、排版、背景、光线、构图边界和所有未选区域必须保持不变。",
|
||
"输入图片2是一张与输入图片1尺寸完全相同的灰度坐标指令图，不是照片，也不是输出底图。它只用细线源框和目标框说明坐标关系；不得学习、复刻或输出其中的线框、灰底或 UI 标记。",
|
||
cropLines
|
||
? `输入图片3及之后是框选区域的干净局部裁切参考图，作用是帮助你确认“要缩放的是哪个主体”。这些裁切图不是输出底图，不得被整体放大、贴回或覆盖到原图上。\n${cropLines}`
|
||
: "",
|
||
"输入图片2中的源框表示输入图片1里目标主体当前大致位置；它只用于定位主体，不限制调整后的空间。目标框表示用户希望主体调整后的视觉占位和中心位置。最终画面不得出现这些线框或灰底；主体也不需要填满目标矩形，必须保持主体自身原始宽高比和透视形体。",
|
||
"如果系统或模型只能读取一张参考图，必须优先以输入图片1为输出基底，不得清理、改写或删除输入图片1中框选区域外的任何文字和图形。",
|
||
"系统已根据用户框选区域计算出下方每个区域的原图坐标；框选区域只是定位目标主体的搜索范围，不是最终画面的裁切块、贴片、蒙版边界，也不是放大后的空间上限，更不是要整体缩放的矩形图层。",
|
||
"最终结果必须保持原始干净图的画幅比例、构图边界、镜头透视、光线、色温、材质质感和清晰度；严禁整张图整体缩放、裁切、平移、重新排版或重新生成。",
|
||
"Highest priority rule: do NOT zoom, crop, resize, reframe, pan, or regenerate the full canvas. Treat image 1 as a locked background plate; edit only the selected subject and the smallest necessary background around its old and new footprint.",
|
||
"请不要生成任何彩色框、矩形边框、箭头、连线、角点、编号圆点、提示词气泡、标注文字、UI 控件或半透明色块。",
|
||
"请同时使用下方每个区域的源框/目标框像素坐标和输入图片2的坐标图来理解目标占位。坐标只用于指导主体位置和大小，不是要求把某个矩形图块缩放后贴回。",
|
||
"",
|
||
"任务：先在输入图片1中识别源框范围内最主要、可独立调整的主体物体，再只对这个“主体物体”做局部比例调整。调整后的主体大小和位置必须接近目标框表示的视觉占位；如果输出看起来和原图一样，就是失败。",
|
||
regionLines,
|
||
"",
|
||
"关键要求：",
|
||
"1. 只调整目标主体物体本身的整体视觉比例，不得保留原尺寸；主体轮廓宽度和高度必须同步等比变化，宽高比必须与原主体一致，不能为了贴合目标框而拉宽、压窄、拉高或压扁。",
|
||
"2. 严禁把整个矩形框选区域、输入图片1整张图或任意裁切图当成图片块整体缩放、平移、复制、裁切或贴回；最终画面不得出现矩形拼接边缘、色差硬边、补丁感、裁切线或局部贴片痕迹。",
|
||
"2.1 严禁把输入图片1整张图整体放大、缩小、裁切或重新构图；如果画面中的标题、Logo、页面文字、边框、窗框、背景家具或非目标主体发生整体位移/缩放/消失，必须视为失败并重新生成。请把这些元素当作像素锚点，它们的位置和比例不能跟着目标主体变化。",
|
||
"3. 如果输入图片2中的目标框明显小于源框，目标主体应自然变小，主体缩小后露出的背景、桌面、墙面、阴影、纹理和透视必须被重新生成并无缝补全，选区内应出现明显新增留白或背景。",
|
||
"4. 如果输入图片2中的目标框明显大于源框，目标主体应自然变大；允许主体自然超出用户手画的原始源框，使用周围真实背景完成边缘、阴影和遮挡衔接。宽度和高度都要同步变大，不能出现“高度变高但宽度变窄”的非等比变形；主体边缘与遮挡关系要合理，不能产生突兀裁切。",
|
||
"5. 如果目标框中心与源框中心不同，允许主体同步移动到目标框中心附近；如果主体靠近画布边界导致目标空间不足，请用能完整放入画面的最大统一倍率整体调整，绝不能为了塞进画面而只压缩宽度或只拉伸高度。",
|
||
"6. 框选区域内非目标主体的背景、墙面、桌面、植物、文字和其它物体应保持原场景逻辑，不要跟着主体一起缩放。",
|
||
"6.1 比例调整后的主体边缘必须和周围环境自然融合，选区边界不能被肉眼看出；不得出现一整块矩形区域清晰度、颜色、光照、纹理或透视突然变化。",
|
||
"6.2 框选区域通常会包含主体周围的背景留白，背景留白不是目标主体。请锁定这些非主体背景的窗框、文字、地毯纹理、墙面、桌面边缘和透视线，只重建主体缩放后被遮挡或露出的极小必要区域；不要把框选矩形当作整块背景重新生成。",
|
||
"6.3 如果框选范围内没有清晰、完整、可独立缩放的主体物体，请保持该区域背景结构稳定，不要为了制造变化而重绘窗框、文字、墙面、地面或其它非主体元素。",
|
||
"7. 未受比例调整影响的其它画面区域必须保持原图不变，尤其是框选区域外的文字、Logo、标题、尺寸标注、装饰条和页面排版不得被清理、改写、模糊或重绘。",
|
||
"8. 最终输出必须是一张完整、干净、无缝的照片，不得出现任何选区框、说明文字、对比线、比例数字或 UI 元素。",
|
||
"9. 输出前自检：如果目标主体大小与原图相比没有明显变化，或者主体宽高比发生非等比变形，必须重新生成；禁止返回看起来和原图相同或被拉伸的结果。",
|
||
].join("\n");
|
||
}
|
||
|
||
function buildFalScaleAdjustMockupPrompt(
|
||
regions: NormalizedLocalEditRegion[],
|
||
scalePercent: ScaleAdjustPercent | null | undefined,
|
||
sourceSize: { width: number; height: number }
|
||
) {
|
||
const regionLines = regions
|
||
.map((region) => {
|
||
const targetRect = getScaleAdjustTargetRect(region, scalePercent);
|
||
const targetPixelRect =
|
||
region.targetPixelRect ||
|
||
rectToPixels(targetRect, sourceSize.width, sourceSize.height);
|
||
const widthFactor =
|
||
region.rect.width > 0 ? targetRect.width / region.rect.width : 1;
|
||
const heightFactor =
|
||
region.rect.height > 0 ? targetRect.height / region.rect.height : 1;
|
||
|
||
return `区域 ${region.index}：原主体约在 x=${region.pixelRect.left}, y=${region.pixelRect.top}, w=${region.pixelRect.width}, h=${region.pixelRect.height}；目标主体约在 x=${targetPixelRect.left}, y=${targetPixelRect.top}, w=${targetPixelRect.width}, h=${targetPixelRect.height}；目标视觉占位约为原主体宽度 ${widthFactor.toFixed(2)} 倍、高度 ${heightFactor.toFixed(2)} 倍。必须保持主体自身宽高比和透视，不要拉伸或压扁。`;
|
||
})
|
||
.join("\n");
|
||
|
||
return [
|
||
"这是一项室内家用场景里的家具/物体局部比例调整任务。输入图片1是一张粗略目标效果草图，不是最终结果，也不是标注图。",
|
||
`最终输出必须是一张真实、干净、自然的单张照片，并保持原始画幅 ${sourceSize.width} x ${sourceSize.height} px。`,
|
||
"输入图片1已经把目标主体粗略放到了用户希望的最终大小和位置；请把它作为最终布局意图来理解，但不要直接复制其中的模糊、拼接边缘、软边、矩形块或局部贴片痕迹。",
|
||
"核心目标：只调整被选中的家具/物体主体比例和位置；不要恢复成原来的大尺寸，也不要返回几乎未修改的原图。",
|
||
"请用 AI 自然重建原主体移除后露出的背景，让地毯、地板、窗户、墙面、桌面、阴影、遮挡和透视连续自然。",
|
||
"请保留目标主体的真实材质、结构、轮廓、透视和光照；主体不能透明、幽灵化、变形、被裁切，不能变成说明图或标注元素。",
|
||
"非目标区域必须保持原室内照片逻辑：画幅边界、窗框、沙发、植物、墙面、地毯整体纹理、光线、色温和镜头透视不要整体移动、裁切、放大、缩小或重排。",
|
||
"",
|
||
"区域要求：",
|
||
regionLines,
|
||
"",
|
||
"输出前自检：如果目标主体仍接近原尺寸、输出像未修改原图、整张图被放大/裁切/重排，或者出现矩形框、箭头、文字、遮罩、拼图、硬边贴片、色差边缘，就是失败；必须重新生成一张无缝真实照片。",
|
||
].join("\n");
|
||
}
|
||
|
||
export async function POST(request: NextRequest) {
|
||
try {
|
||
const session = await auth();
|
||
if (!session?.user?.id) {
|
||
return NextResponse.json({ success: false, error: "未授权，请先登录" }, { status: 401 });
|
||
}
|
||
|
||
const body = (await request.json()) as LocalEditRequest;
|
||
const rawSourceImageUrl = String(body.sourceImageUrl || "").trim();
|
||
if (!rawSourceImageUrl) {
|
||
return NextResponse.json({ success: false, error: "缺少 sourceImageUrl 参数" }, { status: 400 });
|
||
}
|
||
|
||
const sourceImageUrl = new URL(rawSourceImageUrl, request.url).toString();
|
||
const sourceBuffer = await sharp(await fetchImageBufferFromUrl(sourceImageUrl), {
|
||
failOn: "none",
|
||
})
|
||
.rotate()
|
||
.toBuffer();
|
||
const sourceMetadata = await sharp(sourceBuffer, { failOn: "none" }).metadata();
|
||
const sourceWidth = Number(sourceMetadata.width || 0);
|
||
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 });
|
||
}
|
||
|
||
const operation = resolveLocalEditOperation(body.operation);
|
||
let scalePercent: ScaleAdjustPercent | null = null;
|
||
if (operation === SCALE_ADJUST_OPERATION) {
|
||
const hasRequestedScalePercent =
|
||
body.scalePercent !== undefined && body.scalePercent !== null;
|
||
if (hasRequestedScalePercent) {
|
||
try {
|
||
scalePercent = normalizeScaleAdjustPercent(body.scalePercent);
|
||
} catch (validationError) {
|
||
return NextResponse.json(
|
||
{
|
||
success: false,
|
||
error:
|
||
validationError instanceof Error
|
||
? validationError.message
|
||
: "比例调整参数无效",
|
||
},
|
||
{ status: 400 }
|
||
);
|
||
}
|
||
}
|
||
}
|
||
|
||
let regions: NormalizedLocalEditRegion[];
|
||
try {
|
||
regions = normalizeRegions(body.regions, sourceWidth, sourceHeight, {
|
||
fallbackPrompt:
|
||
operation === SCALE_ADJUST_OPERATION
|
||
? "比例调整：按目标框调整"
|
||
: undefined,
|
||
requirePrompt: operation !== SCALE_ADJUST_OPERATION,
|
||
});
|
||
} 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 hasScaleAdjustTargetRects =
|
||
operation === SCALE_ADJUST_OPERATION &&
|
||
regions.length > 0 &&
|
||
regions.every((region) => Boolean(region.targetRect));
|
||
if (
|
||
operation === SCALE_ADJUST_OPERATION &&
|
||
!hasScaleAdjustTargetRects &&
|
||
scalePercent === null
|
||
) {
|
||
return NextResponse.json(
|
||
{
|
||
success: false,
|
||
error: "请为每个区域提供有效的目标框 targetRect，或提供比例调整幅度 scalePercent",
|
||
},
|
||
{ status: 400 }
|
||
);
|
||
}
|
||
|
||
const shouldUseScaleAdjustDetailModel =
|
||
operation === SCALE_ADJUST_OPERATION &&
|
||
(hasScaleAdjustTargetRects || scalePercent !== null);
|
||
const [pointsConfig, siteSettingsForModel, scaleAdjustModelCandidates] =
|
||
await Promise.all([
|
||
getPointsSystemConfig(),
|
||
getSiteSettings().catch(() => null),
|
||
shouldUseScaleAdjustDetailModel
|
||
? getEnabledAiModelsWithProvider(false, true).catch((error) => {
|
||
console.warn(
|
||
"[Canvas Local Edit] Failed to load scale adjust model candidates:",
|
||
error
|
||
);
|
||
return [] as AiModelWithProviderForSelection[];
|
||
})
|
||
: Promise.resolve([] as AiModelWithProviderForSelection[]),
|
||
]);
|
||
const pointsCharge = await prepareFeaturePointsCharge({
|
||
userId: session.user.id,
|
||
unitCost: getImageToolCreditCost(pointsConfig, "repaint"),
|
||
reason: operation === SCALE_ADJUST_OPERATION ? "image_scale_adjust" : "image_repaint",
|
||
modelId:
|
||
operation === SCALE_ADJUST_OPERATION ? "canvas-scale-adjust" : "canvas-local-edit",
|
||
note: operation === SCALE_ADJUST_OPERATION ? "比例调整消耗积分" : "局部编辑消耗积分",
|
||
pointsConfig,
|
||
});
|
||
if (!pointsCharge.ok) {
|
||
return NextResponse.json(pointsCharge.payload, { status: pointsCharge.status });
|
||
}
|
||
|
||
const isScaleAdjustOperation =
|
||
operation === SCALE_ADJUST_OPERATION &&
|
||
(hasScaleAdjustTargetRects || scalePercent !== null);
|
||
const displayPrompt = buildLocalEditDisplayPrompt({ operation, scalePercent });
|
||
const resolvedAspectRatio = resolveLocalEditAspectRatio(
|
||
body.aspectRatio,
|
||
sourceWidth,
|
||
sourceHeight
|
||
);
|
||
const requestedModel =
|
||
typeof body.model === "string" && body.model.trim()
|
||
? body.model.trim()
|
||
: undefined;
|
||
const configuredDetailModel =
|
||
typeof siteSettingsForModel?.canvasDetailDefaultModelId === "string"
|
||
? siteSettingsForModel.canvasDetailDefaultModelId.trim()
|
||
: "";
|
||
const detailFixedModel = isScaleAdjustOperation
|
||
? resolveScaleAdjustPreferredModelId({
|
||
configuredModelId: configuredDetailModel,
|
||
requestedModelId: requestedModel || "",
|
||
models: scaleAdjustModelCandidates,
|
||
})
|
||
: "";
|
||
if (
|
||
isScaleAdjustOperation &&
|
||
detailFixedModel &&
|
||
detailFixedModel !== configuredDetailModel
|
||
) {
|
||
console.info("[Canvas Local Edit] Override scale adjust model to detail line:", {
|
||
configuredDetailModel: configuredDetailModel || null,
|
||
requestedModel: requestedModel || null,
|
||
resolvedModel: detailFixedModel,
|
||
});
|
||
}
|
||
const resolvedModel = detailFixedModel || requestedModel;
|
||
const resolvedScaleAdjustModelEntry = isScaleAdjustOperation
|
||
? findModelSelectionEntry(scaleAdjustModelCandidates, resolvedModel || "")
|
||
: null;
|
||
const useFalScaleAdjustMockup =
|
||
isScaleAdjustOperation && isFalImageModelEntry(resolvedScaleAdjustModelEntry);
|
||
|
||
const annotatedBuffer =
|
||
useFalScaleAdjustMockup
|
||
? await buildScaleAdjustFalTargetMockup({
|
||
regions,
|
||
scalePercent,
|
||
sourceBuffer,
|
||
sourceHeight,
|
||
sourceWidth,
|
||
})
|
||
: await sharp(sourceBuffer, { failOn: "none" })
|
||
.composite([
|
||
{
|
||
input: isScaleAdjustOperation
|
||
? buildScaleAdjustAnnotationSvg({
|
||
height: sourceHeight,
|
||
regions,
|
||
scalePercent,
|
||
width: sourceWidth,
|
||
})
|
||
: buildAnnotationSvg({
|
||
height: sourceHeight,
|
||
hidePromptText: false,
|
||
regions,
|
||
width: sourceWidth,
|
||
}),
|
||
left: 0,
|
||
top: 0,
|
||
},
|
||
])
|
||
.png({ compressionLevel: 6 })
|
||
.toBuffer();
|
||
const annotatedFilename = `${useFalScaleAdjustMockup ? "canvas-scale-adjust-fal-target-mockup" : isScaleAdjustOperation ? "canvas-scale-adjust-guide" : "canvas-local-edit"}-${Date.now()}-${Math.random().toString(36).slice(2, 8)}.png`;
|
||
const annotatedUpload = await uploadFile(
|
||
annotatedFilename,
|
||
toArrayBuffer(annotatedBuffer)
|
||
);
|
||
const scaleAdjustCropReferences = isScaleAdjustOperation
|
||
? useFalScaleAdjustMockup
|
||
? []
|
||
: await createScaleAdjustCropReferences({
|
||
regions,
|
||
sourceBuffer,
|
||
sourceHeight,
|
||
sourceWidth,
|
||
})
|
||
: [];
|
||
const prompt = isScaleAdjustOperation
|
||
? useFalScaleAdjustMockup
|
||
? buildFalScaleAdjustMockupPrompt(regions, scalePercent, {
|
||
width: sourceWidth,
|
||
height: sourceHeight,
|
||
})
|
||
: buildScaleAdjustPrompt(
|
||
regions,
|
||
scalePercent,
|
||
scaleAdjustCropReferences,
|
||
{ width: sourceWidth, height: sourceHeight }
|
||
)
|
||
: buildLocalEditPrompt(regions);
|
||
const manualRegionReferenceImageUrls = regions.flatMap((region) =>
|
||
region.referenceImages.map((reference) => reference.url)
|
||
);
|
||
const scaleAdjustCropReferenceImageUrls = scaleAdjustCropReferences.map(
|
||
(reference) => reference.url
|
||
);
|
||
const referenceImages = isScaleAdjustOperation
|
||
? useFalScaleAdjustMockup
|
||
? [annotatedUpload.url]
|
||
: [
|
||
sourceImageUrl,
|
||
annotatedUpload.url,
|
||
...scaleAdjustCropReferenceImageUrls,
|
||
...manualRegionReferenceImageUrls,
|
||
]
|
||
: [sourceImageUrl, ...manualRegionReferenceImageUrls];
|
||
const scaleAdjustCompositeRegions = isScaleAdjustOperation
|
||
? buildScaleAdjustCompositeRegions(regions, scalePercent)
|
||
: [];
|
||
|
||
const imageRequest: CanvasGenerateImageRequest = {
|
||
aspectRatio: resolvedAspectRatio,
|
||
billingFeature: "repaint",
|
||
debugLabel:
|
||
operation === SCALE_ADJUST_OPERATION ? "canvas-scale-adjust" : "canvas-local-edit",
|
||
debugMeta: {
|
||
annotatedReferenceUrl: annotatedUpload.url,
|
||
annotatedReferenceSentToModel: isScaleAdjustOperation,
|
||
annotatedReferenceType: isScaleAdjustOperation
|
||
? useFalScaleAdjustMockup
|
||
? "scale-adjust-fal-rough-target-mockup"
|
||
: "scale-adjust-neutral-coordinate-guide-map"
|
||
: "source-overlay",
|
||
cleanSourceReferenceIndex:
|
||
isScaleAdjustOperation && useFalScaleAdjustMockup ? null : 1,
|
||
configuredDetailModelId: configuredDetailModel || null,
|
||
detailFixedModelApplied: Boolean(detailFixedModel),
|
||
detailFixedModelId: detailFixedModel || null,
|
||
displayPrompt,
|
||
falScaleAdjustMockupApplied: useFalScaleAdjustMockup,
|
||
operation,
|
||
requestedModel: requestedModel || null,
|
||
resolvedAspectRatio,
|
||
resolvedModel: resolvedModel || null,
|
||
resolvedScaleAdjustProviderType:
|
||
resolvedScaleAdjustModelEntry?.provider?.type || null,
|
||
manualRegionReferenceImageCount: manualRegionReferenceImageUrls.length,
|
||
regionReferenceImageCount:
|
||
referenceImages.length,
|
||
regionCount: regions.length,
|
||
scalePercent,
|
||
scaleAdjustCropReferenceCount: scaleAdjustCropReferenceImageUrls.length,
|
||
scaleAdjustProtectionMode: hasScaleAdjustTargetRects
|
||
? "target-rect"
|
||
: "scale-percent",
|
||
scaleAdjustTargetRegionCount: regions.filter((region) => region.targetRect)
|
||
.length,
|
||
scaleAdjustPromptStrategy: isScaleAdjustOperation
|
||
? useFalScaleAdjustMockup
|
||
? "fal-rough-target-mockup-only-v17"
|
||
: "locked-plate-neutral-coordinate-guide-map-pixel-anchors-v8"
|
||
: undefined,
|
||
scaleAdjustPostCompositeApplied: false,
|
||
scaleAdjustUsesFullFrameOutput: isScaleAdjustOperation,
|
||
sourceHeight,
|
||
sourceNodeId: body.sourceNodeId || null,
|
||
sourceWidth,
|
||
},
|
||
displayPrompt,
|
||
imageCount: 1,
|
||
imageSize:
|
||
typeof body.imageSize === "string" && body.imageSize.trim()
|
||
? body.imageSize.trim()
|
||
: "2K",
|
||
model: resolvedModel || undefined,
|
||
negativePrompt:
|
||
isScaleAdjustOperation
|
||
? "彩色框、蓝色边框、绿色边框、红色边框、橙色边框、矩形框、箭头、连线、角点、编号圆点、提示词气泡、标注文字、UI 控件、半透明色块、蓝色色块、色条、灰底坐标图、选区边框、白边、画幅压扁、画面拉伸、整张图缩放、全图放大、全图裁切、全图平移、整体重绘、删除文字、清理文字、改写文字、文字模糊、Logo消失、主体拉伸、主体压扁、主体变窄、主体变高但变窄、横向挤压、纵向拉伸、透视变形、矩形贴片、硬边、拼接线、补丁感、局部裁切、色差边缘、背景断裂、背景错位、窗框错位、文字错位、地毯纹理错位、非主体背景重绘、主体未缩放、整块框选区域缩放"
|
||
: "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、主体截断、动物截断、缺头、缺尾巴、缺四肢、贴边裁切、矩形贴片、硬边、拼接线、补丁感、色差边缘、背景错位、地面纹理断裂、椅脚错位",
|
||
prompt,
|
||
promptExtend: false,
|
||
referenceImages,
|
||
scaleAdjustVerification: isScaleAdjustOperation
|
||
? {
|
||
protectedRegions: scaleAdjustCompositeRegions,
|
||
sourceImageUrl,
|
||
regions: regions.map((region) => region.rect),
|
||
...(typeof scalePercent === "number"
|
||
? { scalePercent: scalePercent as ScaleAdjustPercent }
|
||
: {}),
|
||
...(hasScaleAdjustTargetRects
|
||
? {
|
||
targetRegions: regions
|
||
.map((region) => region.targetRect)
|
||
.filter(
|
||
(
|
||
rect
|
||
): rect is NonNullable<NormalizedLocalEditRegion["targetRect"]> =>
|
||
Boolean(rect)
|
||
),
|
||
}
|
||
: {}),
|
||
}
|
||
: undefined,
|
||
localEditComposite: isScaleAdjustOperation
|
||
? undefined
|
||
: {
|
||
sourceImageUrl,
|
||
regions: regions.map((region) => region.rect),
|
||
},
|
||
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:
|
||
operation === SCALE_ADJUST_OPERATION
|
||
? `比例调整消耗积分（${task.id}）`
|
||
: `局部编辑消耗积分（${task.id}）`,
|
||
});
|
||
} catch (pointsError) {
|
||
console.error("[Points] Failed to consume local edit points:", pointsError);
|
||
}
|
||
}
|
||
|
||
return NextResponse.json({
|
||
success: true,
|
||
annotatedReferenceUrl: annotatedUpload.url,
|
||
aspectRatio: resolvedAspectRatio,
|
||
displayPrompt,
|
||
prompt: displayPrompt,
|
||
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 }
|
||
);
|
||
}
|
||
}
|