24 lines
950 B
TypeScript
24 lines
950 B
TypeScript
import sharp from "sharp";
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// This is the provider's per-reference limit, separate from our 20 MiB upload limit.
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export const VIP98K_REFERENCE_MAX_BYTES = 10 * 1024 * 1024;
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export function isVip98kReferenceSizeAllowed(bytes: number) {
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return Number.isFinite(bytes) && bytes > 0 && bytes <= VIP98K_REFERENCE_MAX_BYTES;
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}
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export async function normalizeVip98kReferenceImage(buffer: Buffer) {
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for (const quality of [92, 82, 70]) {
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const normalized = await sharp(buffer, { failOn: "none" })
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.rotate()
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.resize(1920, 1920, { fit: "inside", withoutEnlargement: true })
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.flatten({ background: "#ffffff" })
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.jpeg({ quality, chromaSubsampling: "4:4:4", mozjpeg: true })
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.toBuffer();
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if (isVip98kReferenceSizeAllowed(normalized.byteLength)) {
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return { buffer: normalized, extension: "jpg" };
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}
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}
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throw new Error("参考图压缩后仍超过服务商单张 10 MiB 限制，请缩小图片后重试");
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}
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