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6f0e3d8e6b
name.js write 函数改用 view.setUint16 后未同步 writer.offset， 导致 name 字符串覆盖 header，name 表损坏。浏览器依赖 name 表 识别字体所以无法渲染，而 Node 端渲染不依赖 name 表所以基准 测试未检测到。 同时修复 cmap sizeof 动态计算记录头大小的问题。 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
43 lines
1.8 KiB
TypeScript
43 lines
1.8 KiB
TypeScript
import { readFile } from "node:fs/promises";
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import { Font } from "../vendor/fonteditor-core/lib/ttf/font.js";
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const raw = await readFile("font/temp/YiShanBeiZhuanTi.ttf");
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const buf = new Uint8Array(raw).buffer;
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const text = "你好世界";
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const subset = [...text].map(c => c.codePointAt(0));
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const font = Font.create(buf, { type: "ttf", subset });
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const optimized = font.optimize().sort();
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const result = optimized.write({ type: "ttf" });
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const data = new Uint8Array(result);
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console.log("=== TTF Header ===");
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const view = new DataView(data.buffer, data.byteOffset, data.byteLength);
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console.log("sfVersion:", "0x" + view.getUint32(0, false).toString(16));
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console.log("numTables:", view.getUint16(4, false));
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const tables: Array<{ tag: string; offset: number; length: number }> = [];
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for (let i = 0; i < view.getUint16(4, false); i++) {
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const offset = 12 + i * 16;
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const tag = String.fromCharCode(view.getUint8(offset), view.getUint8(offset + 1), view.getUint8(offset + 2), view.getUint8(offset + 3));
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const toffset = view.getUint32(offset + 8, false);
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const tlength = view.getUint32(offset + 12, false);
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tables.push({ tag, offset: toffset, length: tlength });
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console.log(" ", tag, "offset=" + toffset, "length=" + tlength);
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}
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const headEntry = tables.find(t => t.tag === "head");
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if (headEntry) {
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const magic = view.getUint32(headEntry.offset + 12, false);
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console.log("\nhead magicNumber:", "0x" + magic.toString(16), magic === 0x5F0F3CF5 ? "OK" : "INVALID!");
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}
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console.log("\nfile size:", data.length);
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console.log("last table end:", Math.max(...tables.map(t => t.offset + t.length)));
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/** 和原始字体对比 */
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const origView = new DataView(buf);
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console.log("\n=== 原始字体 ===");
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console.log("sfVersion:", "0x" + origView.getUint32(0, false).toString(16));
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console.log("numTables:", origView.getUint16(4, false));
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