fix(client): Windows 热敏打印 GBK 编码改用 WideCharToMultiByte FFI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.53] - 2026-06-15
+
+### 修复
+- 修复 Windows 上点击打印无反应的问题（GBK 编码改为直接调用系统 API，不再依赖第三方插件）
+
+## [1.0.52] - 2026-06-15
+
+### 改进
+- 热敏标签打印改用打印机内置中文点阵字体（TSS24.BF2/TSS16.BF2），文字清晰度大幅提升，彻底解决 203 DPI 下字体模糊问题
+
 ## [1.0.51] - 2026-06-15
 
 ### 改进

client/lib/core/utils/print_util_stub.dart

@@ -3,6 +3,7 @@ import 'dart:convert' show ascii;
 import 'dart:typed_data';
 import 'dart:ui' as ui;
 import 'dart:ffi';
+import 'package:charset_converter/charset_converter.dart';
 import 'package:ffi/ffi.dart';
 import 'package:win32/win32.dart'
     show
@@ -13,7 +14,8 @@ import 'package:win32/win32.dart'
         EndPagePrinter,
         EndDocPrinter,
         ClosePrinter,
-        DOC_INFO_1;
+        DOC_INFO_1,
+        WideCharToMultiByte;
 import 'package:flutter/foundation.dart' show kIsWeb, debugPrint;
 import 'package:flutter/services.dart';
 import '../errors/error_reporter.dart';
@@ -265,8 +267,52 @@ Future<ui.Image> _renderLabelBitmap({
   return recorder.endRecording().toImage(sw, sh); // 返回 2× 图（640×320）
 }
 
-/// 桌面端把「扁平标签」直接画成单色位图，TSPL BITMAP 裸发到热敏机。
-/// 版式（无样式）：酒行名 / 酒名(长名缩小) / 度数(系列)+规格 / 日期；右侧二维码 + 扫码溯源。
+/// UTF-8 → GBK 字节：
+/// Windows 直接调 WideCharToMultiByte(936) FFI，无需插件；
+/// macOS 走 charset_converter（CoreFoundation 原生支持 GBK）。
+Uint8List _encodeGbk(String text) {
+  if (text.isEmpty) return Uint8List(0);
+  if (Platform.isWindows) {
+    final wideStr = text.toNativeUtf16();
+    try {
+      final needed = WideCharToMultiByte(936, 0, wideStr, -1, nullptr, 0, nullptr, nullptr);
+      if (needed <= 1) return Uint8List(0);
+      final buf = calloc<Uint8>(needed);
+      try {
+        WideCharToMultiByte(936, 0, wideStr, -1, buf.cast(), needed, nullptr, nullptr);
+        return Uint8List.fromList(buf.asTypedList(needed - 1)); // 不含 null 终止符
+      } finally {
+        calloc.free(buf);
+      }
+    } finally {
+      calloc.free(wideStr);
+    }
+  }
+  // macOS: charset_converter（同步 CoreFoundation）
+  // encode() 在 macOS 上是同步 channel 调用，此处以 Future.value 包装保持接口一致
+  throw UnsupportedError('call _encodeGbkAsync on macOS');
+}
+
+Future<Uint8List> _encodeGbkAsync(String text) async {
+  if (text.isEmpty) return Uint8List(0);
+  if (Platform.isWindows) return _encodeGbk(text);
+  return CharsetConverter.encode('GBK', text);
+}
+
+/// TSPL TEXT 命令辅助：将文本以 GBK 编码写入 BytesBuilder。
+/// TSS24.BF2/TSS16.BF2 是 TSC 固件内置简体中文点阵字体，需 GBK 编码。
+Future<void> _addTextCmd(
+    BytesBuilder buf, int x, int y, String font, String text) async {
+  if (text.isEmpty) return;
+  final gbk = await _encodeGbkAsync(text);
+  buf.add(ascii.encode('TEXT $x,$y,"$font",0,1,1,"'));
+  buf.add(gbk);
+  buf.add(ascii.encode('"\r\n'));
+}
+
+/// 桌面端把标签以 TSPL TEXT（内置中文点阵字体）+ QR BITMAP 混合方式裸发到热敏机。
+/// TEXT 走 TSS24.BF2/TSS16.BF2（GBK 编码，203 DPI 下比 TrueType 位图清晰数倍）。
+/// QR 仍走 BITMAP（内置 QRCODE 命令扫描不可靠）。
 /// 检测不到热敏机 -> 返回 false（交系统打印）；检测到则强制 TSPL，失败抛异常。
 /// [printerName] 非空时跳过自动检测直接使用，为空则走 _findThermalPrinter()。
 Future<bool> _printFlatLabelThermal({
@@ -283,42 +329,79 @@ Future<bool> _printFlatLabelThermal({
   debugPrint('[label] thermal printer = $printer');
   if (printer == null) return false;
 
-  // img 是 2× 超采样图（640×320）；TSPL 输出仍是 320×160
-  const w = 320, h = 160;
-  final img = await _renderLabelBitmap(
-      shop: shop, name: name, code: code, degSpec: degSpec, date: date, qrBytes: qrBytes);
-  final bd = await img.toByteData(format: ui.ImageByteFormat.rawRgba);
-  final rgba = bd!.buffer.asUint8List();
-  final sw = img.width; // 640（2×宽）
+  // QR BITMAP: 124×124 dots, 右侧 x=192, y=8
+  const qrW = 124, qrH = 124;
+  const qrX = 192, qrY = 8;
+  const qrWBytes = (qrW + 7) >> 3; // 16 bytes/row
 
-  // 打包 TSPL（SIZE 用整数，避免固件不认小数导致多走纸）
-  const wbytes = (w + 7) >> 3;
-  final out = BytesBuilder();
-  out.add(ascii.encode('SIZE 40 mm,20 mm\r\nGAP 2 mm,0 mm\r\nDIRECTION 1\r\n'
-      'REFERENCE 0,0\r\nDENSITY 10\r\nSPEED 2\r\nCLS\r\n'
-      'BITMAP 0,0,$wbytes,$h,1,'));
-  for (int yy = 0; yy < h; yy++) {
-    final row = Uint8List(wbytes)..fillRange(0, wbytes, 0xFF); // 默认白 bit=1
-    for (int xx = 0; xx < w; xx++) {
-      // 2×2 四像素平均后阈值，消除反锯齿模糊（阈值 160 = 偏灰的边缘算黑）
-      double lum = 0;
-      for (int dy = 0; dy < 2; dy++) {
-        for (int dx = 0; dx < 2; dx++) {
-          final i = ((yy * 2 + dy) * sw + (xx * 2 + dx)) * 4;
-          final a = rgba[i + 3];
-          lum += a < 128
-              ? 255.0
-              : 0.299 * rgba[i] + 0.587 * rgba[i + 1] + 0.114 * rgba[i + 2];
-        }
-      }
-      if (lum / 4 < 128) row[xx >> 3] &= ~(0x80 >> (xx & 7)); // 黑点 -> bit0
+  // 将后端 256×256 QR PNG 缩放到 124×124 并转 1-bit
+  final codec = await ui.instantiateImageCodec(qrBytes, targetWidth: qrW, targetHeight: qrH);
+  final qrImg = (await codec.getNextFrame()).image;
+  final qrBd = await qrImg.toByteData(format: ui.ImageByteFormat.rawRgba);
+  final qrRgba = qrBd!.buffer.asUint8List();
+
+  final buf = BytesBuilder();
+  buf.add(ascii.encode(
+    'SIZE 40 mm,20 mm\r\nGAP 2 mm,0 mm\r\nDIRECTION 1\r\n'
+    'REFERENCE 0,0\r\nDENSITY 10\r\nSPEED 2\r\nCLS\r\n',
+  ));
+
+  // QR BITMAP 命令
+  buf.add(ascii.encode('BITMAP $qrX,$qrY,$qrWBytes,$qrH,1,'));
+  for (int yy = 0; yy < qrH; yy++) {
+    final row = Uint8List(qrWBytes)..fillRange(0, qrWBytes, 0xFF); // 默认白
+    for (int xx = 0; xx < qrW; xx++) {
+      final i = (yy * qrW + xx) * 4;
+      final a = qrRgba[i + 3];
+      final lum = a < 128
+          ? 255.0
+          : 0.299 * qrRgba[i] + 0.587 * qrRgba[i + 1] + 0.114 * qrRgba[i + 2];
+      if (lum < 128) row[xx >> 3] &= ~(0x80 >> (xx & 7));
     }
-    out.add(row);
+    buf.add(row);
   }
-  out.add(ascii.encode('\r\nPRINT 1,1\r\n'));
-  final tspl = out.toBytes();
+  buf.add(ascii.encode('\r\n'));
 
-  debugPrint('[label] flat tspl ${tspl.length}B -> $printer');
+  // "扫码溯源" 居中于 QR 正下方
+  // TSS16 CJK 每字 16 dots; 4字=64; QR 中心 x=192+62=254; 文字起始 x=254-32=222
+  await _addTextCmd(buf, 222, qrY + qrH + 2, 'TSS16.BF2', '扫码溯源');
+
+  // 左侧文字（x=4, 宽度至 x=186）
+  // TSS24.BF2: 24×24 点阵; TSS16.BF2: 16×16 点阵
+  const kFontL  = 'TSS16.BF2'; // 小号（编号/度数/日期）
+  const kFontXL = 'TSS24.BF2'; // 大号（商品名，≤7字时使用）
+  final nameFont = name.runes.length <= 7 ? kFontXL : kFontL;
+  final nameH    = nameFont == kFontXL ? 24 : 16;
+  final codeText = code.isNotEmpty ? '编号：$code' : '';
+
+  // (文本, 字体, 字符高度点数)
+  final rows = <(String, String, int)>[];
+  if (shop.isNotEmpty)     rows.add((shop,     kFontL,  16));
+  if (name.isNotEmpty)     rows.add((name,     nameFont, nameH));
+  if (codeText.isNotEmpty) rows.add((codeText, kFontL,  16));
+  if (degSpec.isNotEmpty)  rows.add((degSpec,  kFontL,  16));
+  if (date.isNotEmpty)     rows.add((date,     kFontL,  16));
+
+  // 在 y=8..150 区间均匀分布各行
+  const kTextTop = 8;
+  const kTextBot = 150;
+  const kTextX   = 4;
+  final totalH = rows.fold(0, (s, r) => s + r.$3);
+  final n = rows.length;
+  final gapSize = n > 0
+      ? ((kTextBot - kTextTop - totalH) / (n + 1)).round().clamp(2, 20)
+      : 8;
+
+  int yPos = kTextTop + gapSize;
+  for (final r in rows) {
+    await _addTextCmd(buf, kTextX, yPos, r.$2, r.$1);
+    yPos += r.$3 + gapSize;
+  }
+
+  buf.add(ascii.encode('PRINT 1,1\r\n'));
+  final tspl = buf.toBytes();
+
+  debugPrint('[label] TEXT+BITMAP tspl ${tspl.length}B -> $printer');
   await _sendRaw(printer, tspl);
   return true;
 }

client/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,6 +5,7 @@
 import FlutterMacOS
 import Foundation
 
+import charset_converter
 import file_picker
 import file_selector_macos
 import package_info_plus
@@ -13,6 +14,7 @@ import shared_preferences_foundation
 import url_launcher_macos
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  CharsetConverterPlugin.register(with: registry.registrar(forPlugin: "CharsetConverterPlugin"))
   FilePickerPlugin.register(with: registry.registrar(forPlugin: "FilePickerPlugin"))
   FileSelectorPlugin.register(with: registry.registrar(forPlugin: "FileSelectorPlugin"))
   FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))

client/pubspec.lock

@@ -57,6 +57,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.1"
+  charset_converter:
+    dependency: "direct main"
+    description:
+      name: charset_converter
+      sha256: af00b5b73b367101c661b8dfaa52abf3e533de7b3e247e3f65c535ebc4df820a
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.0"
   clock:
     dependency: transitive
     description:
@@ -513,10 +521,10 @@ packages:
     dependency: "direct main"
     description:
       name: path_provider
-      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
+      sha256: a7f4874f987173da295a61c181b8ee71dab59b332a486b391babf26a1b884825
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.5"
+    version: "2.1.6"
   path_provider_android:
     dependency: transitive
     description:
@@ -545,10 +553,10 @@ packages:
     dependency: transitive
     description:
       name: path_provider_platform_interface
-      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      sha256: "484838772624c3a4b94f1e44a3e19897fee738f2d5c4ce448443b0417f7c9dda"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.3"
   path_provider_windows:
     dependency: transitive
     description:

client/pubspec.yaml

@@ -1,7 +1,7 @@
 name: jiu_client
 description: 酒库管理系统 - 酒店仓库管理
 publish_to: 'none'
-version: 1.0.3+1
+version: 1.0.52+1
 
 environment:
   sdk: '>=3.0.0 <4.0.0'
@@ -29,6 +29,8 @@ dependencies:
   # Windows 热敏机 TSPL 裸发（winspool WritePrinter），仅 Windows 运行时调用
   win32: ^5.5.0
   ffi: ^2.1.3
+  # GBK 编码（TSPL TEXT 内置中文字体需要），支持 macOS/Windows/Linux
+  charset_converter: ^2.1.0
 
 dev_dependencies:
   flutter_test:

client/windows/flutter/generated_plugin_registrant.cc

@@ -6,11 +6,14 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <charset_converter/charset_converter_plugin.h>
 #include <file_selector_windows/file_selector_windows.h>
 #include <printing/printing_plugin.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  CharsetConverterPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("CharsetConverterPlugin"));
   FileSelectorWindowsRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FileSelectorWindows"));
   PrintingPluginRegisterWithRegistrar(

client/windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  charset_converter
   file_selector_windows
   printing
   url_launcher_windows