From a4cfcb6bdeaf1d15afa24701308f299f60b4d0be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EC=8B=9C=EA=B3=A8=EC=95=BD=EC=82=AC?= <thug0bin@gmail.com>
Date: Thu, 29 Jan 2026 20:15:13 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20QR=20=ED=85=8C=EC=8A=A4=ED=8A=B8=20v2?=
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---
 backend/test_qr_methods_v2.py | 281 ++++++++++++++++++++++++++++++++++
 1 file changed, 281 insertions(+)
 create mode 100644 backend/test_qr_methods_v2.py

diff --git a/backend/test_qr_methods_v2.py b/backend/test_qr_methods_v2.py
new file mode 100644
index 0000000..7b0a97a
--- /dev/null
+++ b/backend/test_qr_methods_v2.py
@@ -0,0 +1,281 @@
+"""
+ESC/POS QR 코드 인쇄 방식 테스트 v2
+더 많은 변형 시도 (크기, 밀도, 파라미터)
+"""
+
+import socket
+import qrcode
+import time
+
+# 프린터 설정
+PRINTER_IP = "192.168.0.174"
+PRINTER_PORT = 9100
+
+# 테스트 URL (더 짧게)
+TEST_URL = "https://bit.ly/test"
+
+
+def send_to_printer(data, method_name):
+    """프린터로 데이터 전송"""
+    try:
+        print(f"\n[{method_name}] 전송 중... ({len(data)} bytes)")
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.settimeout(10)
+        sock.connect((PRINTER_IP, PRINTER_PORT))
+        sock.sendall(data)
+        sock.close()
+        print(f"[{method_name}] ✅ 완료")
+        time.sleep(1.5)
+        return True
+    except Exception as e:
+        print(f"[{method_name}] ❌ 실패: {e}")
+        return False
+
+
+def method_1_tiny_qr_escstar():
+    """방법 1: 아주 작은 QR (30x30) + ESC *"""
+    ESC = b'\x1b'
+    GS = b'\x1d'
+    commands = []
+    commands.append(ESC + b'@')
+    commands.append("\n================================\n".encode('euc-kr'))
+    commands.append("     *** 방법 1 ***\n".encode('euc-kr'))
+    commands.append("  작은 QR 30x30 (ESC *)\n".encode('euc-kr'))
+    commands.append("================================\n\n".encode('euc-kr'))
+
+    # 30x30 QR
+    qr = qrcode.QRCode(version=1, box_size=1, border=1)
+    qr.add_data(TEST_URL)
+    qr.make(fit=True)
+    img = qr.make_image(fill_color="black", back_color="white").resize((30, 30)).convert('1')
+    width, height = img.size
+    pixels = img.load()
+
+    # ESC * m=0 (8-dot single-density)
+    for y in range(0, height, 8):
+        commands.append(ESC + b'*' + bytes([0, width & 0xFF, (width >> 8) & 0xFF]))
+        for x in range(width):
+            byte = 0
+            for bit in range(min(8, height - y)):
+                if pixels[x, y + bit] == 0:
+                    byte |= (1 << (7 - bit))
+            commands.append(bytes([byte]))
+        commands.append(b'\n')
+
+    commands.append(f"\nURL: {TEST_URL}\n\n\n".encode('euc-kr'))
+    commands.append(GS + b'V' + bytes([1]))
+    return b''.join(commands)
+
+
+def method_2_medium_qr_escstar_mode32():
+    """방법 2: 중간 QR (50x50) + ESC * mode 32"""
+    ESC = b'\x1b'
+    GS = b'\x1d'
+    commands = []
+    commands.append(ESC + b'@')
+    commands.append("\n================================\n".encode('euc-kr'))
+    commands.append("     *** 방법 2 ***\n".encode('euc-kr'))
+    commands.append("  중간 QR 50x50 (ESC * m=32)\n".encode('euc-kr'))
+    commands.append("================================\n\n".encode('euc-kr'))
+
+    # 50x50 QR
+    qr = qrcode.QRCode(version=1, box_size=2, border=1)
+    qr.add_data(TEST_URL)
+    qr.make(fit=True)
+    img = qr.make_image(fill_color="black", back_color="white").resize((50, 50)).convert('1')
+    width, height = img.size
+    pixels = img.load()
+
+    # ESC * m=32 (24-dot single-density)
+    for y in range(0, height, 24):
+        commands.append(ESC + b'*' + bytes([32, width & 0xFF, (width >> 8) & 0xFF]))
+        for x in range(width):
+            byte1 = byte2 = byte3 = 0
+            for bit in range(min(24, height - y)):
+                if pixels[x, y + bit] == 0:
+                    if bit < 8:
+                        byte1 |= (1 << (7 - bit))
+                    elif bit < 16:
+                        byte2 |= (1 << (15 - bit))
+                    else:
+                        byte3 |= (1 << (23 - bit))
+            commands.append(bytes([byte1, byte2, byte3]))
+        commands.append(b'\n')
+
+    commands.append(f"\nURL: {TEST_URL}\n\n\n".encode('euc-kr'))
+    commands.append(GS + b'V' + bytes([1]))
+    return b''.join(commands)
+
+
+def method_3_native_qr_simple():
+    """방법 3: 내장 QR (더 간단한 설정)"""
+    ESC = b'\x1b'
+    GS = b'\x1d'
+    commands = []
+    commands.append(ESC + b'@')
+    commands.append("\n================================\n".encode('euc-kr'))
+    commands.append("     *** 방법 3 ***\n".encode('euc-kr'))
+    commands.append("  내장 QR 간단 설정\n".encode('euc-kr'))
+    commands.append("================================\n\n".encode('euc-kr'))
+
+    qr_data = TEST_URL.encode('utf-8')
+    data_len = len(qr_data) + 3
+
+    # Model 2
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 65, 50]))
+    # Error correction L
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 69, 48]))
+    # Size 4
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 67, 4]))
+    # Store data
+    commands.append(GS + b'(k' + bytes([data_len & 0xFF, (data_len >> 8) & 0xFF, 49, 80, 48]) + qr_data)
+    # Print
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 81, 48]))
+
+    commands.append(f"\n\nURL: {TEST_URL}\n\n\n".encode('euc-kr'))
+    commands.append(GS + b'V' + bytes([1]))
+    return b''.join(commands)
+
+
+def method_4_native_qr_model1():
+    """방법 4: 내장 QR Model 1 (구형)"""
+    ESC = b'\x1b'
+    GS = b'\x1d'
+    commands = []
+    commands.append(ESC + b'@')
+    commands.append("\n================================\n".encode('euc-kr'))
+    commands.append("     *** 방법 4 ***\n".encode('euc-kr'))
+    commands.append("  내장 QR Model 1\n".encode('euc-kr'))
+    commands.append("================================\n\n".encode('euc-kr'))
+
+    qr_data = TEST_URL.encode('utf-8')
+    data_len = len(qr_data) + 3
+
+    # Model 1 (n=49)
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 65, 49]))
+    # Error correction L
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 69, 48]))
+    # Size 4
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 67, 4]))
+    # Store data
+    commands.append(GS + b'(k' + bytes([data_len & 0xFF, (data_len >> 8) & 0xFF, 49, 80, 48]) + qr_data)
+    # Print
+    commands.append(GS + b'(k' + bytes([3, 0, 49, 81, 48]))
+
+    commands.append(f"\n\nURL: {TEST_URL}\n\n\n".encode('euc-kr'))
+    commands.append(GS + b'V' + bytes([1]))
+    return b''.join(commands)
+
+
+def method_5_raster_tiny():
+    """방법 5: Raster 초소형 (40x40)"""
+    ESC = b'\x1b'
+    GS = b'\x1d'
+    commands = []
+    commands.append(ESC + b'@')
+    commands.append("\n================================\n".encode('euc-kr'))
+    commands.append("     *** 방법 5 ***\n".encode('euc-kr'))
+    commands.append("  Raster 40x40 (GS v 0)\n".encode('euc-kr'))
+    commands.append("================================\n\n".encode('euc-kr'))
+
+    # 40x40 QR
+    qr = qrcode.QRCode(version=1, box_size=1, border=1)
+    qr.add_data(TEST_URL)
+    qr.make(fit=True)
+    img = qr.make_image(fill_color="black", back_color="white").resize((40, 40)).convert('1')
+    width, height = img.size
+    pixels = img.load()
+
+    width_bytes = (width + 7) // 8
+    commands.append(GS + b'v0' + bytes([0]))
+    commands.append(bytes([width_bytes & 0xFF, (width_bytes >> 8) & 0xFF]))
+    commands.append(bytes([height & 0xFF, (height >> 8) & 0xFF]))
+
+    for y in range(height):
+        for x in range(0, width, 8):
+            byte = 0
+            for bit in range(8):
+                if x + bit < width and pixels[x + bit, y] == 0:
+                    byte |= (1 << (7 - bit))
+            commands.append(bytes([byte]))
+
+    commands.append(f"\n\nURL: {TEST_URL}\n\n\n".encode('euc-kr'))
+    commands.append(GS + b'V' + bytes([1]))
+    return b''.join(commands)
+
+
+def method_6_no_align():
+    """방법 6: 정렬 없이 + 작은 QR"""
+    ESC = b'\x1b'
+    GS = b'\x1d'
+    commands = []
+    commands.append(ESC + b'@')
+    # 정렬 명령 없음!
+    commands.append("\n================================\n".encode('euc-kr'))
+    commands.append("     *** 방법 6 ***\n".encode('euc-kr'))
+    commands.append("  정렬 없음 + QR 35x35\n".encode('euc-kr'))
+    commands.append("================================\n\n".encode('euc-kr'))
+
+    # 35x35 QR
+    qr = qrcode.QRCode(version=1, box_size=1, border=1)
+    qr.add_data(TEST_URL)
+    qr.make(fit=True)
+    img = qr.make_image(fill_color="black", back_color="white").resize((35, 35)).convert('1')
+    width, height = img.size
+    pixels = img.load()
+
+    # ESC * m=1 (8-dot double-density)
+    for y in range(0, height, 8):
+        commands.append(ESC + b'*' + bytes([1, width & 0xFF, (width >> 8) & 0xFF]))
+        for x in range(width):
+            byte = 0
+            for bit in range(min(8, height - y)):
+                if pixels[x, y + bit] == 0:
+                    byte |= (1 << (7 - bit))
+            commands.append(bytes([byte]))
+        commands.append(b'\n')
+
+    commands.append(f"\nURL: {TEST_URL}\n\n\n".encode('euc-kr'))
+    commands.append(GS + b'V' + bytes([1]))
+    return b''.join(commands)
+
+
+def main():
+    print("="*60)
+    print("ESC/POS QR 테스트 v2 - 더 많은 변형")
+    print("="*60)
+    print(f"프린터: {PRINTER_IP}:{PRINTER_PORT}")
+    print(f"테스트 URL: {TEST_URL}")
+    print("="*60)
+
+    methods = [
+        ("방법 1: 30x30 ESC * m=0", method_1_tiny_qr_escstar),
+        ("방법 2: 50x50 ESC * m=32", method_2_medium_qr_escstar_mode32),
+        ("방법 3: 내장 QR 간단", method_3_native_qr_simple),
+        ("방법 4: 내장 QR Model 1", method_4_native_qr_model1),
+        ("방법 5: 40x40 Raster", method_5_raster_tiny),
+        ("방법 6: 정렬 없음 35x35", method_6_no_align),
+    ]
+
+    results = []
+    for name, method_func in methods:
+        try:
+            data = method_func()
+            success = send_to_printer(data, name)
+            results.append((name, success))
+        except Exception as e:
+            print(f"[{name}] ❌ 오류: {e}")
+            results.append((name, False))
+
+    print("\n" + "="*60)
+    print("결과 요약")
+    print("="*60)
+    for name, success in results:
+        print(f"{name}: {'✅' if success else '❌'}")
+
+    print("\n6장의 영수증이 나옵니다. QR이 보이는 번호를 알려주세요!")
+    print("="*60)
+
+
+if __name__ == "__main__":
+    main()