internalヘッダに関数説明コメントを追加

libptouch_internal.h の内部関数宣言に用途と戻り値の簡潔な説明を付け、実装読解時の確認コストを下げる。 Made-with: Cursor
SVGサンプルファイルを追加
2026-04-16 13:54:36 +09:00 · 2026-04-14 18:30:05 +09:00 · 2026-04-14 18:29:24 +09:00 · 2026-04-13 11:39:31 +09:00 · 2026-04-13 09:47:44 +09:00 · 2026-04-13 09:43:42 +09:00
33 changed files with 2962 additions and 1198 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,8 @@
 build/

+ruby/*.gem
+ruby/.rubocop_cache/
+
 *.o
 *.a
 ptouch-print
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,6 +14,7 @@ include(GNUInstallDirs)
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(LIBUSB REQUIRED IMPORTED_TARGET libusb-1.0)
 find_package(PNG REQUIRED)
+pkg_check_modules(LIBRSVG IMPORTED_TARGET librsvg-2.0)

 configure_file(
 	"${CMAKE_CURRENT_SOURCE_DIR}/include/libptouch_version.h.in"
@@ -21,15 +22,48 @@ configure_file(
 	@ONLY
 )

-add_library(ptouch STATIC src/libptouch.c)
+set(LIBPTOUCH_SOURCES
+	src/lib/libptouch_core.c
+	src/lib/libptouch_usb.c
+	src/lib/libptouch_layout.c
+	src/lib/libptouch_media_info.c
+	src/lib/libptouch_print.c
+	src/lib/libptouch_status.c
+	src/lib/libptouch_png.c
+	src/lib/libptouch_svg.c
+)
+
+add_library(ptouch STATIC ${LIBPTOUCH_SOURCES})
+add_library(ptouch_shared SHARED ${LIBPTOUCH_SOURCES})
+set_target_properties(ptouch_shared PROPERTIES OUTPUT_NAME ptouch
+	SOVERSION ${PROJECT_VERSION_MAJOR})
 target_include_directories(ptouch PUBLIC
 	"$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
 	"$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>"
 	"$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
 )
+target_include_directories(ptouch PRIVATE
+	"${CMAKE_CURRENT_SOURCE_DIR}/src/lib"
+)
+target_include_directories(ptouch_shared PUBLIC
+	"$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
+	"$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>"
+	"$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+)
+target_include_directories(ptouch_shared PRIVATE
+	"${CMAKE_CURRENT_SOURCE_DIR}/src/lib"
+)
 target_link_libraries(ptouch PRIVATE PkgConfig::LIBUSB PNG::PNG)
+target_link_libraries(ptouch_shared PRIVATE PkgConfig::LIBUSB PNG::PNG)
+if(LIBRSVG_FOUND)
+	target_link_libraries(ptouch PRIVATE PkgConfig::LIBRSVG)
+	target_link_libraries(ptouch_shared PRIVATE PkgConfig::LIBRSVG)
+	target_compile_definitions(ptouch PRIVATE LIBPTOUCH_HAS_RSVG=1)
+	target_compile_definitions(ptouch_shared PRIVATE LIBPTOUCH_HAS_RSVG=1)
+endif()
 if(NOT MSVC)
 	target_compile_options(ptouch PRIVATE -Wall -Wextra -Wpedantic)
+	target_compile_options(ptouch_shared PRIVATE -Wall -Wextra -Wpedantic)
 endif()

 add_executable(ptouch-print src/cli/main.c)
@@ -40,6 +74,8 @@ if(NOT MSVC)
 endif()

 install(TARGETS ptouch ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}")
+install(TARGETS ptouch_shared LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+	RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
 install(TARGETS ptouch-print RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
 install(FILES
 	"${CMAKE_CURRENT_SOURCE_DIR}/include/libptouch.h"
--- a/README.md
+++ b/README.md
@@ -4,21 +4,22 @@

 Brother P-touch シリーズ向けのラベル印刷用 **C コアライブラリ（libptouch）** と、動作確認用 **CLI（`ptouch-print`）** のリポジトリです。

-保有機種: **PT-P900W**（USB・ラスターコマンド）。
+対象機種: **PT-P900W**（560 ドットヘッド）、**PT-P750W** / **PT-P710BT**（128 ドットヘッド・USB）。`libptouch_open_usb_vid_pid` に各機種の VID/PID を渡す（P900W 既定は `libptouch_open_usb`）。P750/P710 のラスター仕様は `reference/cv_ptp750w_710bt_jpn_raster_102.pdf`。

 ## レイアウト

 | パス | 内容 |
 |------|------|
 | `include/libptouch.h` | 公開 API |
-| `src/libptouch.c` | ライブラリ本体（スタブ） |
+| `src/lib/libptouch_*.c` | ライブラリ本体（core / usb / print / status / png / svg） |
 | `src/cli/main.c` | `ptouch-print` エントリ |
-| `samples/` | 試験用サンプル画像の置き場（PNG 等） |
+| `samples/` | 試験用サンプル画像の置き場（PNG/SVG 等） |
+| `ruby/` | Ruby FFI gem（`libptouch`）・コマンド `ptouch-print-png`（PNG のみ）— `ruby/README.md` |
 | `reference/` | 仕様・参考資料（例: ラスター PDF） |

 ## ビルド

-依存: **CMake 3.16+**、**libusb-1.0**、**libpng**（開発パッケージ例: `libusb-1.0-0-dev`、`libpng-dev`）。
+依存: **CMake 3.16+**、**libusb-1.0**、**libpng**、**librsvg-2.0**（開発パッケージ例: `libusb-1.0-0-dev`、`libpng-dev`、`librsvg2-dev`）。

 ```bash
 cmake -S . -B build
@@ -28,11 +29,18 @@ cmake --build build
 成果物（`build/` 以下）:

 - `libptouch.a` — 静的ライブラリ
+- `libptouch.so` — 共有ライブラリ（Ruby FFI 用）
 - `ptouch-print` — CLI

+### Ruby gem
+
+共有ライブラリをビルドしたうえで、`ruby/` で `bundle install` → `gem build libptouch.gemspec` など（手順は `ruby/README.md`）。
+
 ## CLI の使い方（雛形）

-**PNG**（拡張子 `.png` または PNG シグネチャ）の場合は幅・高さは画像から取得します。任意で `-t`（0–255）で二値化しきい値を指定できます。
+**PNG**（拡張子 `.png` または PNG シグネチャ）の場合は幅・高さは画像から取得します。  
+**SVG**（拡張子 `.svg`）の場合は現在装着中テープの印字可能ドット幅に合わせて自動拡大・縮小します（USB 接続が必要）。  
+任意で `-t`（0–255）で二値化しきい値を指定できます。

 **1bit packed ラスター**（行優先、行あたり `ceil(width/8)` バイト × 行数）の場合は `-f` に加え `-w` / `-H` が必須です。

@@ -42,6 +50,9 @@ cmake --build build
 # PNG — 検証のみ（USB 不要）
 ./build/ptouch-print -n -f label.png

+# SVG — 幅を現在テープにフィットさせて検証（USB 必要）
+./build/ptouch-print -n -f label.svg
+
 # PNG — しきい値を指定
 ./build/ptouch-print -n -f label.png -t 160

@@ -53,7 +64,12 @@ cmake --build build

 # USB 接続時
 ./build/ptouch-print -f label.png
+./build/ptouch-print -f label.svg
 ./build/ptouch-print -f sample.raster -w 128 -H 64
+
+# PT-P750W / PT-P710BT（`lsusb` の PID に合わせる）
+./build/ptouch-print --status -p 0x2062
+./build/ptouch-print -f label.png -p 0x20af
 ```

 `-n`（`--dry-run`）では読み込みと `libptouch_check_raster` まで実行します。
@@ -64,8 +80,10 @@ cmake --build build
 - `libptouch_create` / `libptouch_destroy` — コンテキスト
 - `libptouch_open_usb` / `libptouch_open_usb_vid_pid` / `libptouch_close` — USB（libusb・VID/PID）
 - `libptouch_get_status` / `libptouch_status_fprint` — ステータス情報リクエスト（ESC i S）の応答
+- `libptouch_get_current_media_info` — 現在テープ幅(mm)・印字可能幅(dots)・DPI・最小余白(mm)を取得
 - `libptouch_check_raster` — ラスターバッファの検証のみ
 - `libptouch_png_file_to_raster` / `libptouch_free_raster` — PNG を 1bit ラスターに変換（libpng）
+- `libptouch_svg_file_to_raster_fit_current_tape` — SVG を現在テープ幅に合わせて 1bit ラスターへ変換（librsvg + cairo、USB 必須）
 - `libptouch_print_raster` — ラスター印刷（USB・PDF のコマンド列、内部で転置）
 - `libptouch_strerror` / `libptouch_last_error` — エラー情報

@@ -73,12 +91,13 @@ cmake --build build

 ## PT-P900W / Linux でのメモ

- 接続は **libusb-1.0** のみ。機種ごとに **VID/PID**（`lsusb` 等）を調べ、`libptouch_open_usb_vid_pid` に渡すか、既定の PT-P900W なら `libptouch_open_usb` を使います。
- ラスターコマンドの詳細は **`reference/` の PDF** および Brother 公開資料に沿って `src/libptouch.c` に実装してください。
+- 接続は **libusb-1.0** のみ。機種ごとに **VID/PID**（`lsusb` 等）を調べ、`libptouch_open_usb_vid_pid` に渡すか、既定の PT-P900W なら `libptouch_open_usb` を使います。PT-P750W は **04f9:2062**、PT-P710BT は **04f9:20af**（`include/libptouch.h` の定数参照）。
+- PT-P750W / PT-P710BT ではラスター幅方向は **180 dpi**（P900W は 360 dpi）。PNG から印刷する場合は解像度に合わせて画像を用意してください。
+- ラスターコマンドの詳細は **`reference/` の PDF** および Brother 公開資料に沿って `src/lib/libptouch_*.c` に実装してください。

 ### Ubuntu で sudo なしで USB を開く（udev）

-既定の **04f9:2085**（PT-P900W）向けルールを `udev/99-ptouch-label-brother.rules` に置いています。
+**04f9:2085**（PT-P900W）、**04f9:2062**（PT-P750W）、**04f9:20af**（PT-P710BT）向けルールを `udev/99-ptouch-label-brother.rules` に置いています。

 ```bash
 sudo cp udev/99-ptouch-label-brother.rules /etc/udev/rules.d/
--- a/include/libptouch.h
+++ b/include/libptouch.h
@@ -8,7 +8,8 @@
 /**
 * libptouch — Brother P-touch ラスター印刷 (USB) 用 C API
 *
- * 対象例: PT-P900W（ラスターコマンド）。実装は src/libptouch.c を参照。
+ * 対象例: PT-P900W（560 ドットヘッド）、PT-P750W / PT-P710BT（128 ドットヘッド）。
+ * 実装は src/lib/libptouch_*.c を参照。
 */

 #ifndef LIBPTOUCH_H
@@ -41,6 +42,9 @@ typedef enum {
 /** lsusb 例: PT-P900W — Brother Industries, Ltd (04f9:2085) */
 #define LIBPTOUCH_USB_VID_BROTHER 0x04f9u
 #define LIBPTOUCH_USB_PID_PTP900W 0x2085u
+/** PT-P750W / PT-P710BT（cv_ptp750w_710bt_jpn_raster_102.pdf Appendix A） */
+#define LIBPTOUCH_USB_PID_PTP750W 0x2062u
+#define LIBPTOUCH_USB_PID_PTP710BT 0x20afu

 libptouch_ctx *libptouch_create(void);
 void libptouch_destroy(libptouch_ctx *ctx);
@@ -69,6 +73,19 @@ typedef struct {
 	uint8_t margin_mm;    /**< 余白など（機種・仕様に合わせて使用） */
 } libptouch_raster_params_t;

+typedef struct {
+	uint8_t media_width_code;   /**< status[10] */
+	uint8_t media_kind_code;    /**< status[11] */
+	double print_dpi;           /**< 印字幅方向 DPI（現状 180 or 360） */
+	double feed_dpi;            /**< 送り方向 DPI（ESC i d の基準） */
+	double tape_width_mm;       /**< 装着テープ幅（mm）。例: 3.5, 6, 9, 12, 18, 24, 36 */
+	uint16_t printable_dots;    /**< 現在テープで印字可能な幅（ドット） */
+	uint16_t left_margin_dots;  /**< 左余白（ドット） */
+	uint16_t right_margin_dots; /**< 右余白（ドット） */
+	uint16_t min_feed_dots;     /**< 仕様上の最小送り量（ドット）。現在は 14 */
+	double min_feed_mm;         /**< 最小送り量（mm） */
+} libptouch_media_info_t;
+
 /**
 * バッファサイズとパラメータの整合性のみ検査（USB 不要）。--dry-run 用。
 */
@@ -77,9 +94,17 @@ libptouch_err_t libptouch_check_raster(libptouch_ctx *ctx,
 				     const libptouch_raster_params_t *params);

 /**
- * 1 ビット packed ラスターを USB で印刷（cv_ptp900_jpn_raster_102.pdf 準拠）。
+ * 現在装着テープの情報を取得する（USB 接続済み必須）。
+ * ステータスと機種プロファイルからテープ幅・印字可能幅・最小余白量を返す。
+ */
+libptouch_err_t libptouch_get_current_media_info(libptouch_ctx *ctx,
+						 libptouch_media_info_t *out_info);
+
+/**
+ * 1 ビット packed ラスターを USB で印刷（各機種のラスター PDF 準拠）。
 * 印字前にステータスでテープ幅を読み、印刷可能ドット内に画像を中央配置する。
- * width_dots は装着テープの印刷可能幅以下であること。360dpi 相当のドット列を想定。
+ * width_dots は装着テープの印刷可能幅以下であること。PT-P900 系は幅 360dpi、
+ * PT-P750W / PT-P710BT は幅 180dpi（cv_ptp750w_710bt_jpn_raster_102.pdf）のドット列を想定。
 * @param margin_mm 余白（フィード）量。0 のとき PDF の最小 1mm（14 ドット）相当を送る。
 * 印刷時は内部でドット列を転置する（テープ幅方向とバッファの縦横の対応）。
 * @param data 1 行あたり width_dots ビットを ceil(width_dots/8) バイトで並べた連続領域
@@ -96,6 +121,10 @@ typedef struct {
 	uint8_t threshold; /**< 輝度がこれ未満なら黒（1）、以上なら白（0） */
 } libptouch_png_options_t;

+typedef struct {
+	uint8_t threshold; /**< 輝度がこれ未満なら黒（1）、以上なら白（0） */
+} libptouch_svg_options_t;
+
 /**
 * PNG ファイルを読み、1bit packed ラスターに変換する（libpng）。
 * @param out_raster malloc 済みバッファのポインタを返す。不要時は @ref libptouch_free_raster で解放。
@@ -105,6 +134,17 @@ libptouch_err_t libptouch_png_file_to_raster(libptouch_ctx *ctx, const char *pat
 					     uint8_t **out_raster, size_t *out_raster_bytes,
 					     libptouch_raster_params_t *out_params);

+/**
+ * SVG ファイルを現在装着中テープの印字可能幅に合わせて 1bit packed ラスターへ変換する
+ * （librsvg + cairo）。
+ * @note 現在テープ幅を取得するため、事前に @ref libptouch_open_usb などで USB 接続が必要。
+ * @param out_raster malloc 済みバッファのポインタを返す。不要時は @ref libptouch_free_raster で解放。
+ */
+libptouch_err_t libptouch_svg_file_to_raster_fit_current_tape(
+	libptouch_ctx *ctx, const char *path,
+	const libptouch_svg_options_t *options, uint8_t **out_raster,
+	size_t *out_raster_bytes, libptouch_raster_params_t *out_params);
+
 void libptouch_free_raster(uint8_t *raster);

 /** ステータス情報リクエスト（ESC i S）の応答バイト数（cv_ptp900_jpn_raster_102.pdf） */
--- a/reference/cv_ptp750w_710bt_jpn_raster_102.pdf
+++ b/reference/cv_ptp750w_710bt_jpn_raster_102.pdf
--- a/ruby/.rubocop.yml
+++ b/ruby/.rubocop.yml
@@ -0,0 +1,66 @@
+# RuboCop — libptouch gem
+# https://docs.rubocop.org/
+
+AllCops:
+  TargetRubyVersion: 3.0
+  NewCops: enable
+  SuggestExtensions: false
+  Exclude:
+    - "vendor/**/*"
+    - ".bundle/**/*"
+
+Layout/LineLength:
+  Max: 120
+
+Layout/MultilineMethodCallIndentation:
+  EnforcedStyle: indented_relative_to_receiver
+
+Lint/RedundantCopDisableDirective:
+  Severity: convention
+
+# ステータスデコードはデータテーブル中心で行数・複雑度が大きくなりがち
+Metrics/AbcSize:
+  Max: 60
+
+Metrics/BlockLength:
+  Max: 35
+  Exclude:
+    - "**/*.gemspec"
+
+Metrics/MethodLength:
+  Max: 40
+
+Metrics/ModuleLength:
+  Max: 220
+
+Metrics/ParameterLists:
+  Max: 6
+
+Naming/MethodParameterName:
+  AllowedNames:
+    - "b"
+    - "w"
+
+Style/Documentation:
+  Enabled: false
+
+Style/DoubleNegation:
+  Enabled: false
+
+# optional な環境変数の参照に fetch は不向きなことが多い
+Style/FetchEnvVar:
+  Enabled: false
+
+Style/FrozenStringLiteralComment:
+  EnforcedStyle: always
+
+# FFI の %i[] / %w[] はそのままの方が読みやすい
+Style/SymbolArray:
+  Enabled: false
+
+Style/WordArray:
+  Enabled: false
+
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+  ConsistentQuotesInMultiline: true
--- a/ruby/Gemfile
+++ b/ruby/Gemfile
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gemspec
+
+group :development do
+  gem "rubocop", "~> 1.69", require: false
+end
--- a/ruby/Gemfile.lock
+++ b/ruby/Gemfile.lock
@@ -0,0 +1,99 @@
+PATH
+  remote: .
+  specs:
+    libptouch (1.0.0)
+      ffi (~> 1.15)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.3)
+    ffi (1.17.4)
+    ffi (1.17.4-aarch64-linux-gnu)
+    ffi (1.17.4-aarch64-linux-musl)
+    ffi (1.17.4-arm-linux-gnu)
+    ffi (1.17.4-arm-linux-musl)
+    ffi (1.17.4-arm64-darwin)
+    ffi (1.17.4-x86-linux-gnu)
+    ffi (1.17.4-x86-linux-musl)
+    ffi (1.17.4-x86_64-darwin)
+    ffi (1.17.4-x86_64-linux-gnu)
+    ffi (1.17.4-x86_64-linux-musl)
+    json (2.19.3)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    parallel (2.0.1)
+    parser (3.3.11.1)
+      ast (~> 2.4.1)
+      racc
+    prism (1.9.0)
+    racc (1.8.1)
+    rainbow (3.1.1)
+    regexp_parser (2.12.0)
+    rubocop (1.86.1)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (>= 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.49.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.49.1)
+      parser (>= 3.3.7.2)
+      prism (~> 1.7)
+    ruby-progressbar (1.13.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+
+PLATFORMS
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  ruby
+  x86-linux-gnu
+  x86-linux-musl
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
+
+DEPENDENCIES
+  libptouch!
+  rubocop (~> 1.69)
+
+CHECKSUMS
+  ast (2.4.3) sha256=954615157c1d6a382bc27d690d973195e79db7f55e9765ac7c481c60bdb4d383
+  ffi (1.17.4) sha256=bcd1642e06f0d16fc9e09ac6d49c3a7298b9789bcb58127302f934e437d60acf
+  ffi (1.17.4-aarch64-linux-gnu) sha256=b208f06f91ffd8f5e1193da3cae3d2ccfc27fc36fba577baf698d26d91c080df
+  ffi (1.17.4-aarch64-linux-musl) sha256=9286b7a615f2676245283aef0a0a3b475ae3aae2bb5448baace630bb77b91f39
+  ffi (1.17.4-arm-linux-gnu) sha256=d6dbddf7cb77bf955411af5f187a65b8cd378cb003c15c05697f5feee1cb1564
+  ffi (1.17.4-arm-linux-musl) sha256=9d4838ded0465bef6e2426935f6bcc93134b6616785a84ffd2a3d82bc3cf6f95
+  ffi (1.17.4-arm64-darwin) sha256=19071aaf1419251b0a46852abf960e77330a3b334d13a4ab51d58b31a937001b
+  ffi (1.17.4-x86-linux-gnu) sha256=38e150df5f4ca555e25beca4090823ae09657bceded154e3c52f8631c1ed72cf
+  ffi (1.17.4-x86-linux-musl) sha256=fbeec0fc7c795bcf86f623bb18d31ea1820f7bd580e1703a3d3740d527437809
+  ffi (1.17.4-x86_64-darwin) sha256=aa70390523cf3235096cf64962b709b4cfbd5c082a2cb2ae714eb0fe2ccda496
+  ffi (1.17.4-x86_64-linux-gnu) sha256=9d3db14c2eae074b382fa9c083fe95aec6e0a1451da249eab096c34002bc752d
+  ffi (1.17.4-x86_64-linux-musl) sha256=3fdf9888483de005f8ef8d1cf2d3b20d86626af206cbf780f6a6a12439a9c49e
+  json (2.19.3) sha256=289b0bb53052a1fa8c34ab33cc750b659ba14a5c45f3fcf4b18762dc67c78646
+  language_server-protocol (3.17.0.5) sha256=fd1e39a51a28bf3eec959379985a72e296e9f9acfce46f6a79d31ca8760803cc
+  libptouch (1.0.0)
+  lint_roller (1.1.0) sha256=2c0c845b632a7d172cb849cc90c1bce937a28c5c8ccccb50dfd46a485003cc87
+  parallel (2.0.1) sha256=337782d3e39f4121e67563bf91dd8ece67f48923d90698614773a0ec9a5b2c7d
+  parser (3.3.11.1) sha256=d17ace7aabe3e72c3cc94043714be27cc6f852f104d81aa284c2281aecc65d54
+  prism (1.9.0) sha256=7b530c6a9f92c24300014919c9dcbc055bf4cdf51ec30aed099b06cd6674ef85
+  racc (1.8.1) sha256=4a7f6929691dbec8b5209a0b373bc2614882b55fc5d2e447a21aaa691303d62f
+  rainbow (3.1.1) sha256=039491aa3a89f42efa1d6dec2fc4e62ede96eb6acd95e52f1ad581182b79bc6a
+  regexp_parser (2.12.0) sha256=35a916a1d63190ab5c9009457136ae5f3c0c7512d60291d0d1378ba18ce08ebb
+  rubocop (1.86.1) sha256=44415f3f01d01a21e01132248d2fd0867572475b566ca188a0a42133a08d4531
+  rubocop-ast (1.49.1) sha256=4412f3ee70f6fe4546cc489548e0f6fcf76cafcfa80fa03af67098ffed755035
+  ruby-progressbar (1.13.0) sha256=80fc9c47a9b640d6834e0dc7b3c94c9df37f08cb072b7761e4a71e22cff29b33
+  unicode-display_width (3.2.0) sha256=0cdd96b5681a5949cdbc2c55e7b420facae74c4aaf9a9815eee1087cb1853c42
+  unicode-emoji (4.2.0) sha256=519e69150f75652e40bf736106cfbc8f0f73aa3fb6a65afe62fefa7f80b0f80f
+
+BUNDLED WITH
+  4.0.6
--- a/ruby/README.md
+++ b/ruby/README.md
@@ -0,0 +1,100 @@
+# libptouch（Ruby gem）
+
+[ptouch_label](../) の **libptouch** を [ffi](https://github.com/ffi/ffi) 経由で使うための Gem です。C ライブラリと同様、**PT-P900W**（既定 USB PID）、**PT-P750W** / **PT-P710BT** などは `open_usb_vid_pid` または CLI の `-p` で選びます。
+
+## 前提
+
+1. リポジトリルートで共有ライブラリをビルドする（`libptouch.so` が `build/` に生成されます）。
+
+   ```bash
+   cmake -S .. -B ../build
+   cmake --build ../build
+   ```
+
+2. Ruby 3.0 以上と `ffi` gem。
+
+## インストール（開発時）
+
+```bash
+cd ruby
+bundle install   # または gem install ffi
+bundle exec rubocop   # 任意: スタイルチェック（.rubocop.yml）
+gem build libptouch.gemspec
+gem install ./libptouch-1.0.0.gem
+```
+
+ビルド済みの `../build/libptouch.so` を自動で読みに行きます。別のパスにある場合は環境変数で指定できます。
+
+```bash
+export LIBPTOUCH_LIB=/usr/local/lib/libptouch.so
+```
+
+（`cmake --install` で共有ライブラリをインストールした場合は、通常は `libptouch` 名でローダが解決します。）
+
+## コマンド `ptouch-print-png`（PNG/SVG）
+
+C の `ptouch-print` と同様の流れで、**PNG/SVG 入力**（`-w`/`-H` や 1bit ラスターは扱いません）を扱います。`gem install` 後は PATH に `ptouch-print-png` が入ります。
+SVG は現在装着テープの印字可能幅に合わせて自動拡大・縮小します（USB 接続が必要）。
+
+オプションは C 側に合わせ、**`-p` / `--pid`** で USB 製品 ID（16 進可）を指定できます。省略時は PT-P900W（`Libptouch::USB_PID_PTP900W` = `0x2085`）。例: PT-P750W `0x2062`、PT-P710BT `0x20af`（`libptouch.h` / `Libptouch` 定数と同じ）。
+
+開発ツリーからそのまま試す例:
+
+```bash
+bundle exec ruby -I lib exe/ptouch-print-png --help
+bundle exec ruby -I lib exe/ptouch-print-png -n -f ../samples/your.png
+bundle exec ruby -I lib exe/ptouch-print-png -n -f ../samples/your.svg
+bundle exec ruby -I lib exe/ptouch-print-png --status -p 0x2062
+bundle exec ruby -I lib exe/ptouch-print-png -f ../samples/your.png -p 0x20af
+```
+
+## 使用例
+
+```ruby
+require "libptouch"
+
+Libptouch::Context.new.tap do |ctx|
+  ctx.open_usb
+  # PT-P750W など別 PID のとき:
+  # ctx.open_usb_vid_pid(Libptouch::USB_VID_BROTHER, Libptouch::USB_PID_PTP750W)
+  p ctx.status_bytes.bytesize # => 32
+  p ctx.status_hash[:tape_kind]   # => {:code=>..., :label=>"ラミネートテープ"} など
+  p ctx.status_hash[:model]       # => {:code=>..., :name=>"PT-P750W"} など（対応機種のみ名前あり）
+  p ctx.status_hash[:status_kind] # => 状態（ステータス種類）
+ensure
+  ctx.dispose
+end
+```
+
+生の 32 バイトだけある場合は `Libptouch.parse_status(raw)` で同じ Hash 形式に展開できます（中身は `libptouch_status_fprint` と同じ区分）。
+
+PNG からラスターへ:
+
+```ruby
+ctx = Libptouch::Context.new
+data, w, h = ctx.png_file_to_raster("/path/to/label.png")
+ctx.open_usb_vid_pid(Libptouch::USB_VID_BROTHER, Libptouch::USB_PID_PTP750W)
+ctx.print_raster(data, width_dots: w, height_dots: h, margin_mm: 0)
+ctx.dispose
+```
+
+SVG から現在テープ幅に合わせてラスターへ:
+
+```ruby
+ctx = Libptouch::Context.new
+ctx.open_usb
+data, w, h = ctx.svg_file_to_raster_fit_current_tape("/path/to/label.svg")
+ctx.print_raster(data, width_dots: w, height_dots: h, margin_mm: 0)
+ctx.dispose
+```
+
+**解像度:** P750W / P710BT はラスター幅方向が **180 dpi**、P900W 系は **360 dpi**（C の `libptouch_print` / 各機種ラスター PDF に合わせて画像を用意してください）。
+
+## API の範囲
+
+- 実行ファイル `ptouch-print-png` … PNG/SVG（`-f`, `-t`, `-p`, `-n`, `-S`, `-V`, `-h`）。ステータスは JSON（`status_bytes` を `parse_status` したもの、`raw_bytes` 除く）
+- `Libptouch::Context` … `open_usb` / `open_usb_vid_pid` / `close` / `dispose`
+- `check_raster` / `print_raster` / `png_file_to_raster` / `svg_file_to_raster_fit_current_tape` / `status_bytes` / `status_hash` / `current_media_info`
+- `current_media_info` には `print_dpi` / `feed_dpi` / `tape_width_mm` / `min_feed_mm` などを含む
+- `Libptouch.parse_status(raw)` … 32 バイトを Hash に展開（機種・テープ幅・**テープ種類**・色・**状態（status_kind）**・エラービット・`raw_hex` など）
+- C の `libptouch_status_fprint`（`FILE *`）は FFI からはバインドしていません。テキスト出力の代わりに `parse_status` / `status_hash` を使ってください。
--- a/ruby/exe/ptouch-print-png
+++ b/ruby/exe/ptouch-print-png
@@ -0,0 +1,6 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "libptouch/cli/png_print"
+
+exit Libptouch::Cli::PngPrint.run(ARGV)
--- a/ruby/lib/libptouch.rb
+++ b/ruby/lib/libptouch.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+# Ruby FFI bindings for libptouch (Brother P-touch raster printing).
+#
+# Author: knb
+# Email: knb@artif.org
+
+require_relative "libptouch/version"
+require_relative "libptouch/error"
+require_relative "libptouch/binding"
+require_relative "libptouch/status_hash"
+require_relative "libptouch/context"
+
+module Libptouch
+  ERR_NOMEM = 1
+  ERR_ARG = 2
+  ERR_USB = 3
+  ERR_IO = 4
+  ERR_UNSUPPORTED = 5
+  ERR_NOT_FOUND = 6
+  ERR_IMAGE = 7
+
+  USB_VID_BROTHER = 0x04f9
+  USB_PID_PTP900W = 0x2085
+  USB_PID_PTP750W = 0x2062
+  USB_PID_PTP710BT = 0x20af
+
+  STATUS_LENGTH = 32
+  PNG_DEFAULT_THRESHOLD = 128
+end
--- a/ruby/lib/libptouch/binding.rb
+++ b/ruby/lib/libptouch/binding.rb
@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+require "ffi"
+
+module Libptouch
+  module Binding
+    extend FFI::Library
+
+    def self.library_files
+      list = []
+      env = ENV["LIBPTOUCH_LIB"]
+      list << env if env && !env.empty?
+      base = File.expand_path("../../..", __dir__)
+      %w[libptouch.so libptouch.dylib].each do |name|
+        path = File.join(base, "build", name)
+        list << path if File.file?(path)
+      end
+      list << "libptouch"
+      list
+    end
+
+    ffi_lib library_files
+
+    class RasterParams < FFI::Struct
+      layout :width_dots, :uint32,
+             :height_dots, :uint32,
+             :margin_mm, :uint8,
+             :_pad, [:uint8, 3]
+    end
+
+    class MediaInfo < FFI::Struct
+      layout :media_width_code, :uint8,
+             :media_kind_code, :uint8,
+             :_pad0, [:uint8, 6],
+             :print_dpi, :double,
+             :feed_dpi, :double,
+             :tape_width_mm, :double,
+             :printable_dots, :uint16,
+             :left_margin_dots, :uint16,
+             :right_margin_dots, :uint16,
+             :min_feed_dots, :uint16,
+             :min_feed_mm, :double
+    end
+
+    class PngOptions < FFI::Struct
+      layout :threshold, :uint8
+    end
+
+    class SvgOptions < FFI::Struct
+      layout :threshold, :uint8
+    end
+
+    attach_function :libptouch_create, [], :pointer
+    attach_function :libptouch_destroy, [:pointer], :void
+    attach_function :libptouch_strerror, [:pointer], :string
+    attach_function :libptouch_last_error, [:pointer], :int
+    attach_function :libptouch_open_usb, [:pointer], :int
+    attach_function :libptouch_open_usb_vid_pid, %i[pointer uint16 uint16], :int
+    attach_function :libptouch_close, [:pointer], :void
+    attach_function :libptouch_check_raster, %i[pointer pointer size_t pointer], :int
+    attach_function :libptouch_get_current_media_info, %i[pointer pointer], :int
+    attach_function :libptouch_print_raster, %i[pointer pointer size_t pointer], :int
+    attach_function :libptouch_png_file_to_raster,
+                    %i[pointer string pointer pointer pointer pointer], :int
+    attach_function :libptouch_svg_file_to_raster_fit_current_tape,
+                    %i[pointer string pointer pointer pointer pointer], :int
+    attach_function :libptouch_free_raster, [:pointer], :void
+    attach_function :libptouch_get_status, %i[pointer pointer], :int
+  end
+end
--- a/ruby/lib/libptouch/cli/png_print.rb
+++ b/ruby/lib/libptouch/cli/png_print.rb
@@ -0,0 +1,251 @@
+# frozen_string_literal: true
+
+require "json"
+require "optparse"
+
+require "libptouch"
+
+module Libptouch
+  module Cli
+    # PNG/SVG を扱う ptouch-print 相当の CLI（1bit ラスター経路なし）。
+    module PngPrint
+      module_function
+
+      def run(argv)
+        opts = parse(argv)
+        return 2 if opts.nil?
+
+        return run_version if opts[:version]
+        return run_help if opts[:help]
+
+        if opts[:status]
+          warn_unused_file_options(opts)
+          return run_status(opts)
+        end
+
+        return usage_error("-f is required (or use --status)") if opts[:file].to_s.empty?
+
+        path = opts[:file]
+        kind = image_kind(path)
+        return usage_error("not a PNG/SVG file: #{path}") if kind.nil?
+
+        run_print(path, opts, kind)
+      end
+
+      def png_file?(path)
+        return true if path.downcase.end_with?(".png")
+
+        File.open(path, "rb") do |f|
+          sig = f.read(8)
+          sig == "\x89PNG\r\n\x1a\n".b
+        end
+      rescue Errno::ENOENT, Errno::EACCES => e
+        warn "open #{path}: #{e.message}"
+        false
+      end
+
+      def svg_file?(path)
+        path.downcase.end_with?(".svg")
+      end
+
+      def image_kind(path)
+        return :png if png_file?(path)
+        return :svg if svg_file?(path)
+
+        nil
+      end
+
+      def parse(argv)
+        opts_hash = default_cli_opts
+        build_cli_parser(opts_hash).parse!(argv)
+        return nil unless threshold_option_ok?(opts_hash)
+        return nil unless usb_pid_option_ok?(opts_hash)
+
+        opts_hash.delete(:usb_pid_invalid)
+        opts_hash
+      end
+
+      def default_cli_opts
+        {
+          file: nil,
+          threshold: nil,
+          usb_pid: nil,
+          usb_pid_invalid: false,
+          dry_run: false,
+          status: false,
+          version: false,
+          help: false
+        }
+      end
+
+      def pid_option_description
+        p900 = Libptouch::USB_PID_PTP900W
+        p750 = Libptouch::USB_PID_PTP750W
+        p710 = Libptouch::USB_PID_PTP710BT
+        "USB 製品 ID（16 進可）。既定 P900W 0x#{p900.to_s(16)}; " \
+          "P750W 0x#{p750.to_s(16)}; P710BT 0x#{p710.to_s(16)}"
+      end
+
+      def apply_usb_pid_option(opts_hash, pid_str)
+        opts_hash[:usb_pid] = Integer(pid_str, 0)
+      rescue ArgumentError
+        warn "invalid --pid: #{pid_str.inspect}"
+        opts_hash[:usb_pid_invalid] = true
+      end
+
+      def threshold_option_ok?(opts_hash)
+        return true if opts_hash[:threshold].nil? || (0..255).cover?(opts_hash[:threshold])
+
+        warn "-t must be 0..255"
+        false
+      end
+
+      def usb_pid_option_ok?(opts_hash)
+        return false if opts_hash[:usb_pid_invalid]
+        return true if opts_hash[:usb_pid].nil?
+        return true if opts_hash[:usb_pid].between?(1, 0xFFFF)
+
+        warn "-p/--pid must be 1..0xFFFF"
+        false
+      end
+
+      def build_cli_parser(opts_hash)
+        OptionParser.new do |p|
+          p.banner = usage_banner
+          p.separator ""
+          p.on("-f", "--file PATH", "入力 PNG/SVG ファイル") { |v| opts_hash[:file] = v }
+          p.on("-t", "--threshold N", Integer,
+               "二値化しきい値 0–255（既定 #{Libptouch::PNG_DEFAULT_THRESHOLD}、PNG/SVG）") do |v|
+            opts_hash[:threshold] = v
+          end
+          p.on("-p", "--pid PID", pid_option_description) do |v|
+            apply_usb_pid_option(opts_hash, v)
+          end
+          p.on("-n", "--dry-run", "読み込みと検証のみ（USB なし）") { opts_hash[:dry_run] = true }
+          p.on("-S", "--status", "USB プリンタのステータスを JSON で表示して終了") do
+            opts_hash[:status] = true
+          end
+          p.on("-V", "--version", "バージョンを表示して終了") { opts_hash[:version] = true }
+          p.on("-h", "--help", "このヘルプ") { opts_hash[:help] = true }
+        end
+      end
+
+      def usage_banner
+        <<~BANNER
+          Usage: ptouch-print-png [options]
+
+          PNG/SVG 対応。幅・高さは画像から取得します（-w/-H はありません）。
+          SVG は現在テープ幅に合わせて自動拡大・縮小します（USB 接続必須）。
+          --status のときは -f は不要です。
+        BANNER
+      end
+
+      def warn_unused_file_options(opts)
+        return unless opts[:file] || opts[:dry_run] || !opts[:threshold].nil?
+
+        warn "warning: options other than --status are ignored"
+      end
+
+      def run_version
+        puts "ptouch-print-png #{Libptouch::VERSION}"
+        0
+      end
+
+      def run_help
+        puts usage_banner
+        puts ""
+        puts parser_help_text
+        0
+      end
+
+      def parser_help_text
+        opts_hash = default_cli_opts
+        p = OptionParser.new do |parser|
+          parser.banner = "ptouch-print-png [options]"
+          parser.on("-f", "--file PATH", "入力 PNG/SVG ファイル") { |v| opts_hash[:file] = v }
+          parser.on("-t", "--threshold N", Integer,
+                    "二値化しきい値 0–255（既定 #{Libptouch::PNG_DEFAULT_THRESHOLD}、PNG/SVG）") do |v|
+            opts_hash[:threshold] = v
+          end
+          parser.on("-p", "--pid PID", pid_option_description) do |v|
+            apply_usb_pid_option(opts_hash, v)
+          end
+          parser.on("-n", "--dry-run", "読み込みと検証のみ（USB なし）") { opts_hash[:dry_run] = true }
+          parser.on("-S", "--status", "USB プリンタのステータスを JSON で表示して終了") do
+            opts_hash[:status] = true
+          end
+          parser.on("-V", "--version", "バージョンを表示して終了") { opts_hash[:version] = true }
+          parser.on("-h", "--help", "このヘルプ") { opts_hash[:help] = true }
+        end
+        p.help
+      end
+
+      def open_usb_for_opts(ctx, opts)
+        if opts[:usb_pid]
+          ctx.open_usb_vid_pid(Libptouch::USB_VID_BROTHER, opts[:usb_pid])
+        else
+          ctx.open_usb
+        end
+      end
+
+      def run_status(opts)
+        ctx = nil
+        begin
+          ctx = Libptouch::Context.new
+          open_usb_for_opts(ctx, opts)
+          h = Libptouch.parse_status(ctx.status_bytes)
+          h.delete(:raw_bytes)
+          puts JSON.pretty_generate(h)
+          0
+        rescue Libptouch::Error => e
+          warn "get_status: #{e.message}"
+          1
+        ensure
+          ctx&.dispose
+        end
+      end
+
+      def run_print(path, opts, kind)
+        ctx = nil
+        begin
+          ctx = Libptouch::Context.new
+          threshold = opts[:threshold]
+          data, width, height = if kind == :svg
+                                  open_usb_for_opts(ctx, opts)
+                                  if threshold.nil?
+                                    ctx.svg_file_to_raster_fit_current_tape(path)
+                                  else
+                                    ctx.svg_file_to_raster_fit_current_tape(path, threshold: threshold)
+                                  end
+                                elsif threshold.nil?
+                                  ctx.png_file_to_raster(path)
+                                else
+                                  ctx.png_file_to_raster(path, threshold: threshold)
+                                end
+
+          ctx.check_raster(data, width_dots: width, height_dots: height)
+
+          if opts[:dry_run]
+            puts "dry-run OK: #{data.bytesize} bytes, src #{width}x#{height} dots (print lengthxwidth #{width}x#{height})"
+            return 0
+          end
+
+          open_usb_for_opts(ctx, opts) if kind == :png
+          ctx.print_raster(data, width_dots: width, height_dots: height)
+          0
+        rescue Libptouch::Error => e
+          warn e.message
+          1
+        ensure
+          ctx&.dispose
+        end
+      end
+
+      def usage_error(msg)
+        warn msg
+        warn "(try ptouch-print-png --help)"
+        2
+      end
+    end
+  end
+end
--- a/ruby/lib/libptouch/context.rb
+++ b/ruby/lib/libptouch/context.rb
@@ -0,0 +1,145 @@
+# frozen_string_literal: true
+
+module Libptouch
+  class Context
+    OK = 0
+
+    attr_reader :native
+
+    def initialize
+      @native = Binding.libptouch_create
+      raise Libptouch::Error.new(0, "libptouch_create failed") if @native.null?
+    end
+
+    def last_message
+      Binding.libptouch_strerror(@native)
+    end
+
+    def last_error_code
+      Binding.libptouch_last_error(@native)
+    end
+
+    def raise_on_error(code)
+      return if code == OK
+
+      msg = Binding.libptouch_strerror(@native)
+      raise Libptouch::Error.new(code, msg)
+    end
+
+    def open_usb
+      raise_on_error(Binding.libptouch_open_usb(@native))
+      self
+    end
+
+    def open_usb_vid_pid(vid, pid)
+      raise_on_error(Binding.libptouch_open_usb_vid_pid(@native, vid, pid))
+      self
+    end
+
+    def close
+      Binding.libptouch_close(@native) if @native && !@native.null?
+      self
+    end
+
+    def dispose
+      close
+      Binding.libptouch_destroy(@native) if @native && !@native.null?
+      @native = nil
+    end
+
+    def check_raster(data, width_dots:, height_dots:, margin_mm: 0)
+      params = Binding::RasterParams.new
+      params[:width_dots] = width_dots
+      params[:height_dots] = height_dots
+      params[:margin_mm] = margin_mm
+      buf = FFI::MemoryPointer.new(:uint8, data.bytesize)
+      buf.put_bytes(0, data)
+      raise_on_error(Binding.libptouch_check_raster(@native, buf, data.bytesize,
+                                                    params.pointer))
+      self
+    end
+
+    def print_raster(data, width_dots:, height_dots:, margin_mm: 0)
+      params = Binding::RasterParams.new
+      params[:width_dots] = width_dots
+      params[:height_dots] = height_dots
+      params[:margin_mm] = margin_mm
+      buf = FFI::MemoryPointer.new(:uint8, data.bytesize)
+      buf.put_bytes(0, data)
+      raise_on_error(Binding.libptouch_print_raster(@native, buf, data.bytesize,
+                                                    params.pointer))
+      self
+    end
+
+    def png_file_to_raster(path, threshold: nil)
+      opt_ptr = nil
+      unless threshold.nil?
+        o = Binding::PngOptions.new
+        o[:threshold] = threshold
+        opt_ptr = o.pointer
+      end
+      out_pp = FFI::MemoryPointer.new(:pointer)
+      out_len = FFI::MemoryPointer.new(:size_t)
+      out_params = Binding::RasterParams.new
+      raise_on_error(Binding.libptouch_png_file_to_raster(
+                       @native, path, opt_ptr, out_pp, out_len, out_params.pointer
+                     ))
+      raw = out_pp.read_pointer
+      raise Libptouch::Error.new(OK, "null raster from PNG") if raw.null?
+
+      len = out_len.get(:size_t, 0)
+      bytes = raw.read_bytes(len)
+      Binding.libptouch_free_raster(raw)
+      [bytes, out_params[:width_dots], out_params[:height_dots]]
+    end
+
+    def svg_file_to_raster_fit_current_tape(path, threshold: nil)
+      opt_ptr = nil
+      unless threshold.nil?
+        o = Binding::SvgOptions.new
+        o[:threshold] = threshold
+        opt_ptr = o.pointer
+      end
+      out_pp = FFI::MemoryPointer.new(:pointer)
+      out_len = FFI::MemoryPointer.new(:size_t)
+      out_params = Binding::RasterParams.new
+      raise_on_error(Binding.libptouch_svg_file_to_raster_fit_current_tape(
+                       @native, path, opt_ptr, out_pp, out_len, out_params.pointer
+                     ))
+      raw = out_pp.read_pointer
+      raise Libptouch::Error.new(OK, "null raster from SVG") if raw.null?
+
+      len = out_len.get(:size_t, 0)
+      bytes = raw.read_bytes(len)
+      Binding.libptouch_free_raster(raw)
+      [bytes, out_params[:width_dots], out_params[:height_dots]]
+    end
+
+    def status_bytes
+      buf = FFI::MemoryPointer.new(:uint8, STATUS_LENGTH)
+      raise_on_error(Binding.libptouch_get_status(@native, buf))
+      buf.read_bytes(STATUS_LENGTH)
+    end
+
+    def status_hash
+      Libptouch.parse_status(status_bytes)
+    end
+
+    def current_media_info
+      info = Binding::MediaInfo.new
+      raise_on_error(Binding.libptouch_get_current_media_info(@native, info.pointer))
+      {
+        media_width_code: info[:media_width_code],
+        media_kind_code: info[:media_kind_code],
+        print_dpi: info[:print_dpi],
+        feed_dpi: info[:feed_dpi],
+        tape_width_mm: info[:tape_width_mm],
+        printable_dots: info[:printable_dots],
+        left_margin_dots: info[:left_margin_dots],
+        right_margin_dots: info[:right_margin_dots],
+        min_feed_dots: info[:min_feed_dots],
+        min_feed_mm: info[:min_feed_mm]
+      }
+    end
+  end
+end
--- a/ruby/lib/libptouch/error.rb
+++ b/ruby/lib/libptouch/error.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module Libptouch
+  class Error < StandardError
+    attr_reader :code
+
+    def initialize(code, message = nil)
+      @code = code
+      super(message || "libptouch error #{code}")
+    end
+  end
+end
--- a/ruby/lib/libptouch/status_hash.rb
+++ b/ruby/lib/libptouch/status_hash.rb
@@ -0,0 +1,199 @@
+# frozen_string_literal: true
+
+module Libptouch
+  # 32 バイトのステータス応答を Hash に展開する（C の libptouch_status_fprint と同じ区分）。
+  module StatusHash
+    class << self
+      def decode(raw)
+        unless raw.bytesize == STATUS_LENGTH
+          raise ArgumentError,
+                "expected #{STATUS_LENGTH} bytes, got #{raw.bytesize}"
+        end
+
+        s = raw.bytes
+
+        {
+          header_ok: s[0] == 0x80 && s[1] == 0x20,
+          header: [s[0], s[1]],
+          brother_code: s[2],
+          brother_code_char: s[2] >= 32 && s[2] < 127 ? s[2].chr(Encoding::ASCII_8BIT) : nil,
+          model: model_entry(s[4]),
+          region_code: s[5],
+          region_char: s[5] >= 32 && s[5] < 127 ? s[5].chr(Encoding::ASCII_8BIT) : nil,
+          battery: labeled(BATTERY, s[6]),
+          extended_error: extended_error_entry(s[7]),
+          error_info1: error_info1(s[8]),
+          error_info2: error_info2(s[9]),
+          media_width: media_width_entry(s[10], s[17]),
+          tape_kind: labeled(MEDIA_KIND, s[11]),
+          color_count: s[12],
+          font_jp: s[13],
+          font: s[14],
+          mode: s[15],
+          density: s[16],
+          status_kind: labeled(STATUS_KIND, s[18]),
+          phase_type: s[19],
+          phase_number: [s[20], s[21]],
+          notification_number: s[22],
+          extended_section_bytes: s[23],
+          tape_color: labeled(TAPE_COLOR, s[24]),
+          text_color: s[25],
+          raw_hex: raw.unpack1("H*"),
+          raw_bytes: s.dup
+        }
+      end
+
+      private
+
+      def model_entry(code)
+        {
+          code: code,
+          name: MODEL_NAMES[code],
+          ascii_char: code >= 32 && code < 127 ? code.chr(Encoding::ASCII_8BIT) : nil
+        }
+      end
+
+      def labeled(table, byte)
+        {
+          code: byte,
+          label: table[byte]
+        }
+      end
+
+      def extended_error_entry(byte)
+        h = { code: byte, label: EXTENDED_ERROR[byte] }
+        h[:none] = true if byte.zero?
+        h
+      end
+
+      def media_width_entry(w, len_byte)
+        entry = labeled(MEDIA_WIDTH, w)
+        if w == 0x15 && len_byte != 0
+          entry[:media_length_code] = len_byte
+          entry[:media_length_note_mm] = len_byte
+        end
+        entry
+      end
+
+      def error_info1(b)
+        {
+          raw: b,
+          media_missing: !!(b & 0x01),
+          media_end: !!(b & 0x02),
+          cutter_jam: !!(b & 0x04),
+          battery_weak: !!(b & 0x08),
+          high_voltage_adapter: !!(b & 0x40)
+        }
+      end
+
+      def error_info2(b)
+        {
+          raw: b,
+          media_mismatch: !!(b & 0x01),
+          comm_error: !!(b & 0x04),
+          comm_buffer_full: !!(b & 0x08),
+          cover_open: !!(b & 0x10),
+          heat_error: !!(b & 0x20),
+          tip_detection_error: !!(b & 0x40),
+          system_error: !!(b & 0x80)
+        }
+      end
+    end
+
+    MODEL_NAMES = {
+      0x6F => "PT-P900W",
+      0x70 => "PT-P950NW",
+      0x71 => "PT-P900",
+      0x78 => "PT-P910BT",
+      0x68 => "PT-P750W",
+      0x76 => "PT-P710BT"
+    }.freeze
+
+    MEDIA_WIDTH = {
+      0x00 => "テープなし / 未装着",
+      0x04 => "3.5 mm",
+      0x06 => "6 mm",
+      0x09 => "9 mm",
+      0x0C => "12 mm",
+      0x12 => "18 mm",
+      0x18 => "24 mm",
+      0x24 => "36 mm",
+      0x15 => "FLe 21 mm 幅（長さはメディア長バイト参照）"
+    }.freeze
+
+    MEDIA_KIND = {
+      0x00 => "テープなし",
+      0x01 => "ラミネートテープ",
+      0x03 => "ノンラミネートテープ",
+      0x04 => "ファブリックテープ",
+      0x11 => "ヒートシュリンクチューブ (HS 2:1)",
+      0x13 => "FLe テープ",
+      0x14 => "フレキシブルＩＤテープ",
+      0x15 => "サテンテープ",
+      0x17 => "ヒートシュリンクチューブ (HS 3:1)",
+      0xFF => "非対応テープ"
+    }.freeze
+
+    BATTERY = {
+      0x00 => "フル",
+      0x01 => "ハーフ",
+      0x02 => "ロー",
+      0x03 => "要充電",
+      0x04 => "AC アダプター使用中",
+      0xFF => "不明"
+    }.freeze
+
+    TAPE_COLOR = {
+      0x01 => "白 (White)",
+      0x02 => "その他 (Other)",
+      0x03 => "透明 (Clear)",
+      0x04 => "赤 (Red)",
+      0x05 => "青 (Blue)",
+      0x06 => "黄 (Yellow)",
+      0x07 => "緑 (Green)",
+      0x08 => "黒 (Black)",
+      0x09 => "透明（文字白）",
+      0x20 => "白（マット） (Matte White)",
+      0x21 => "透明（マット） (Matte Clear)",
+      0x22 => "銀（マット） (Matte Silver)",
+      0x23 => "金（サテン） (Satin Gold)",
+      0x24 => "銀（サテン） (Satin Silver)",
+      0x30 => "青（D）",
+      0x31 => "赤（D）",
+      0x40 => "オレンジ（蛍光）",
+      0x41 => "黄（蛍光）",
+      0x50 => "ピンク（S）",
+      0x51 => "グレー（S）",
+      0x52 => "グリーン（S）",
+      0x60 => "イエロー（F）",
+      0x61 => "ピンク（F）",
+      0x62 => "ブルー（F）",
+      0x70 => "白（チューブ）",
+      0x90 => "白（フレキ）",
+      0x91 => "黄（フレキ）",
+      0xF0 => "クリーニング",
+      0xF1 => "ステンシル",
+      0xFF => "非対応"
+    }.freeze
+
+    STATUS_KIND = {
+      0x00 => "印刷終了",
+      0x01 => "エラー発生",
+      0x02 => "IF モード終了",
+      0x03 => "パワーオフ（未使用扱い）",
+      0x04 => "通知",
+      0x05 => "フェーズ変更"
+    }.freeze
+
+    EXTENDED_ERROR = {
+      0x10 => "FLE のテープエンド",
+      0x1D => "高解像度/ドラフト印刷エラー",
+      0x1E => "アダプター抜き挿しエラー",
+      0x21 => "非対応メディアエラー"
+    }.freeze
+  end
+
+  def self.parse_status(raw)
+    StatusHash.decode(raw)
+  end
+end
--- a/ruby/lib/libptouch/version.rb
+++ b/ruby/lib/libptouch/version.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module Libptouch
+  VERSION = "1.0.0"
+end
--- a/ruby/libptouch.gemspec
+++ b/ruby/libptouch.gemspec
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+lib = File.expand_path("lib", __dir__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require "libptouch/version"
+
+Gem::Specification.new do |spec|
+  spec.name = "libptouch"
+  spec.version = Libptouch::VERSION
+  spec.authors = ["knb"]
+  spec.email = ["knb@artif.org"]
+
+  spec.summary = "FFI bindings for libptouch (Brother P-touch USB raster printing)"
+  spec.description = [
+    "Ruby wrapper around the ptouch_label C library libptouch.",
+    "Supports PT-P900W, PT-P750W, PT-P710BT and related open_usb_vid_pid / --pid.",
+    "Requires libptouch shared library (libusb, libpng)."
+  ].join(" ")
+  spec.license = "MIT"
+  spec.required_ruby_version = ">= 3.0"
+  repo = "https://gitea.artif.org/knb/ptouch_label"
+  spec.homepage = repo
+  spec.metadata["source_code_uri"] = repo
+  spec.metadata["rubygems_mfa_required"] = "true"
+
+  spec.files = Dir.chdir(__dir__) { Dir["lib/**/*.rb", "exe/*", "README.md"] }
+  spec.bindir = "exe"
+  spec.executables = ["ptouch-print-png"]
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "ffi", "~> 1.15"
+end
--- a/samples/aB.png
+++ b/samples/aB.png
--- a/samples/sample.svg
+++ b/samples/sample.svg
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="84.467712mm"
+   height="27.798302mm"
+   viewBox="0 0 84.467714 27.798302"
+   version="1.1"
+   id="svg5"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs2" />
+  <g
+     id="layer1"
+     transform="matrix(1.7339801,0,0,1.6120341,-33.843459,-17.498256)">
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:500;font-stretch:normal;font-size:3.79808px;font-family:'Noto Sans CJK JP';-inkscape-font-specification:'Noto Sans CJK JP, Medium';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke-width:0.383995;stroke-dasharray:none"
+       x="20.38328"
+       y="14.980056"
+       id="text234"><tspan
+         id="tspan232"
+         style="font-style:normal;font-variant:normal;font-weight:500;font-stretch:normal;font-size:3.79808px;font-family:'Noto Sans CJK JP';-inkscape-font-specification:'Noto Sans CJK JP, Medium';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.383995;stroke-dasharray:none"
+         x="20.38328"
+         y="14.980056">印刷出来るかな？</tspan><tspan
+         style="font-style:normal;font-variant:normal;font-weight:500;font-stretch:normal;font-size:3.79808px;font-family:'Noto Sans CJK JP';-inkscape-font-specification:'Noto Sans CJK JP, Medium';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.383995;stroke-dasharray:none"
+         x="20.38328"
+         y="18.948805"
+         id="tspan236">取り敢えず何か書いてみる</tspan><tspan
+         style="font-style:normal;font-variant:normal;font-weight:500;font-stretch:normal;font-size:3.79808px;font-family:'Noto Sans CJK JP';-inkscape-font-specification:'Noto Sans CJK JP, Medium';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.383995;stroke-dasharray:none"
+         x="20.38328"
+         y="22.917555"
+         id="tspan238">4行くらい入りそう</tspan><tspan
+         style="font-style:normal;font-variant:normal;font-weight:500;font-stretch:normal;font-size:3.79808px;font-family:'Noto Sans CJK JP';-inkscape-font-specification:'Noto Sans CJK JP, Medium';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.383995;stroke-dasharray:none"
+         x="20.38328"
+         y="26.886305"
+         id="tspan240">123456</tspan></text>
+  </g>
+</svg>
--- a/src/cli/main.c
+++ b/src/cli/main.c
@@ -21,13 +21,15 @@ static void usage(const char *argv0)
 		"  -f, --file PATH     入力ファイル\n"
 		"  -w, --width DOTS    1bit ラスター時: 幅（ドット）\n"
 		"  -H, --height DOTS   1bit ラスター時: 高さ（ドット）\n"
-		"  -t, --threshold N PNG 二値化しきい値 0–255（既定 %u、PNG のみ）\n"
+		"  -t, --threshold N  二値化しきい値 0–255（既定 %u、PNG/SVG）\n"
 		"  -n, --dry-run       読み込みと check_raster のみ（USB なし）\n"
+		"  -p, --pid HEX       USB 製品 ID（既定: P900W の 0x2085）。例: P750W 0x2062、P710BT 0x20af\n"
 		"  -S, --status        USB 接続プリンタのステータス（テープ種・幅・色等）を表示して終了\n"
 		"  -V, --version       バージョンを表示して終了\n"
 		"  -h, --help          このヘルプ\n"
 		"\n"
-		"PNG の場合は幅・高さはファイルから取得（-w/-H 不要）。\n"
+		"PNG は幅・高さを画像から取得（-w/-H 不要）。\n"
+		"SVG は現在テープの印字可能幅に合わせて自動拡大・縮小（USB 必須）。\n"
 		"1bit packed ラスター（行優先）の場合は -f -w -H が必須。\n"
 		"--status のときは -f は不要（他オプションは無視されます）。\n",
 		argv0, (unsigned)LIBPTOUCH_PNG_DEFAULT_THRESHOLD);
@@ -53,6 +55,14 @@ static int input_is_png(const char *path)
 	return memcmp(sig, png_magic, sizeof(png_magic)) == 0;
 }

+static int input_is_svg(const char *path)
+{
+	const char *dot = strrchr(path, '.');
+	if (dot && strcasecmp(dot, ".svg") == 0)
+		return 1;
+	return 0;
+}
+
 static int read_file(const char *path, uint8_t **out, size_t *out_len)
 {
 	FILE *fp = fopen(path, "rb");
@@ -95,6 +105,7 @@ int main(int argc, char **argv)
 	const char *file = NULL;
 	unsigned width = 0, height = 0;
 	unsigned threshold = LIBPTOUCH_PNG_DEFAULT_THRESHOLD;
+	unsigned usb_pid_arg = 0;
 	int dry_run = 0;
 	int has_threshold = 0;
 	int want_status = 0;
@@ -104,6 +115,7 @@ int main(int argc, char **argv)
 		{ "file", required_argument, NULL, 'f' },
 		{ "threshold", required_argument, NULL, 't' },
 		{ "dry-run", no_argument, NULL, 'n' },
+		{ "pid", required_argument, NULL, 'p' },
 		{ "status", no_argument, NULL, 'S' },
 		{ "version", no_argument, NULL, 'V' },
 		{ "help", no_argument, NULL, 'h' },
@@ -111,7 +123,7 @@ int main(int argc, char **argv)
 	};

 	int c;
-	while ((c = getopt_long(argc, argv, "w:H:f:t:nhSV", longopts, NULL)) !=
+	while ((c = getopt_long(argc, argv, "w:H:f:t:p:nhSV", longopts, NULL)) !=
 	       -1) {
 		switch (c) {
 		case 'w':
@@ -134,6 +146,13 @@ int main(int argc, char **argv)
 		case 'n':
 			dry_run = 1;
 			break;
+		case 'p':
+			usb_pid_arg = (unsigned)strtoul(optarg, NULL, 0);
+			if (usb_pid_arg == 0u || usb_pid_arg > 0xFFFFu) {
+				fprintf(stderr, "-p/--pid must be 1..0xFFFF\n");
+				return 2;
+			}
+			break;
 		case 'S':
 			want_status = 1;
 			break;
@@ -159,7 +178,12 @@ int main(int argc, char **argv)
 			fprintf(stderr, "libptouch_create failed\n");
 			return 1;
 		}
-		libptouch_err_t se = libptouch_open_usb(sctx);
+		libptouch_err_t se =
+		    usb_pid_arg != 0
+			? libptouch_open_usb_vid_pid(
+			      sctx, LIBPTOUCH_USB_VID_BROTHER,
+			      (uint16_t)usb_pid_arg)
+			: libptouch_open_usb(sctx);
 		if (se != LIBPTOUCH_OK) {
 			fprintf(stderr, "open_usb: %s\n", libptouch_strerror(sctx));
 			libptouch_destroy(sctx);
@@ -186,20 +210,21 @@ int main(int argc, char **argv)
 	}

 	int png = input_is_png(file);
-	if (png) {
+	int svg = input_is_svg(file);
+	if (png || svg) {
 		if (width != 0 || height != 0)
 			fprintf(stderr,
-				"warning: -w/-H ignored for PNG (using image size)\n");
+				"warning: -w/-H ignored for image inputs\n");
 	} else {
 		if (width == 0 || height == 0) {
 			fprintf(stderr,
-				"1bit raster requires -w and -H (or use a PNG file)\n");
+				"1bit raster requires -w and -H (or use a PNG/SVG file)\n");
 			usage(argv[0]);
 			return 2;
 		}
 		if (has_threshold)
 			fprintf(stderr,
-				"warning: -t applies to PNG only (ignored)\n");
+				"warning: -t applies to PNG/SVG only (ignored)\n");
 	}

 	libptouch_ctx *ctx = libptouch_create();
@@ -212,6 +237,7 @@ int main(int argc, char **argv)
 	size_t data_len = 0;
 	libptouch_raster_params_t params = { 0, 0, 0 };
 	libptouch_err_t e;
+	int usb_opened = 0;

 	if (png) {
 		libptouch_png_options_t opt = { .threshold = (uint8_t)threshold };
@@ -224,6 +250,28 @@ int main(int argc, char **argv)
 			libptouch_destroy(ctx);
 			return 1;
 		}
+	} else if (svg) {
+		e = usb_pid_arg != 0
+			? libptouch_open_usb_vid_pid(ctx, LIBPTOUCH_USB_VID_BROTHER,
+						     (uint16_t)usb_pid_arg)
+			: libptouch_open_usb(ctx);
+		if (e != LIBPTOUCH_OK) {
+			fprintf(stderr, "open_usb: %s\n", libptouch_strerror(ctx));
+			libptouch_destroy(ctx);
+			return 1;
+		}
+		usb_opened = 1;
+		libptouch_svg_options_t opt = { .threshold = (uint8_t)threshold };
+		e = libptouch_svg_file_to_raster_fit_current_tape(
+			ctx, file, has_threshold ? &opt : NULL, &data, &data_len,
+			&params);
+		if (e != LIBPTOUCH_OK) {
+			fprintf(stderr, "svg_file_to_raster_fit_current_tape: %s\n",
+				libptouch_strerror(ctx));
+			libptouch_close(ctx);
+			libptouch_destroy(ctx);
+			return 1;
+		}
 	} else {
 		if (read_file(file, &data, &data_len) != 0) {
 			libptouch_destroy(ctx);
@@ -239,7 +287,7 @@ int main(int argc, char **argv)
 		fprintf(stderr, "check_raster: %s\n",
 			libptouch_strerror(ctx));
 		libptouch_destroy(ctx);
-		if (png)
+		if (png || svg)
 			libptouch_free_raster(data);
 		else
 			free(data);
@@ -247,27 +295,37 @@ int main(int argc, char **argv)
 	}

 	if (dry_run) {
-		printf("dry-run OK: %zu bytes, %ux%u dots\n", data_len,
+		printf("dry-run OK: %zu bytes, src %ux%u dots (print lengthxwidth %ux%u)\n",
+		       data_len,
+		       (unsigned)params.width_dots,
+		       (unsigned)params.height_dots,
 		       (unsigned)params.width_dots,
 		       (unsigned)params.height_dots);
+		if (usb_opened)
+			libptouch_close(ctx);
 		libptouch_destroy(ctx);
-		if (png)
+		if (png || svg)
 			libptouch_free_raster(data);
 		else
 			free(data);
 		return 0;
 	}

-	e = libptouch_open_usb(ctx);
+	if (!usb_opened) {
+		e = usb_pid_arg != 0
+			? libptouch_open_usb_vid_pid(ctx, LIBPTOUCH_USB_VID_BROTHER,
+						     (uint16_t)usb_pid_arg)
+			: libptouch_open_usb(ctx);
 		if (e != LIBPTOUCH_OK) {
 			fprintf(stderr, "open_usb: %s\n", libptouch_strerror(ctx));
 			libptouch_destroy(ctx);
-		if (png)
+			if (png || svg)
 				libptouch_free_raster(data);
 			else
 				free(data);
 			return 1;
 		}
+	}

 	e = libptouch_print_raster(ctx, data, data_len, &params);
 	if (e != LIBPTOUCH_OK) {
@@ -275,7 +333,7 @@ int main(int argc, char **argv)
 			libptouch_strerror(ctx));
 		libptouch_close(ctx);
 		libptouch_destroy(ctx);
-		if (png)
+		if (png || svg)
 			libptouch_free_raster(data);
 		else
 			free(data);
@@ -284,7 +342,7 @@ int main(int argc, char **argv)

 	libptouch_close(ctx);
 	libptouch_destroy(ctx);
-	if (png)
+	if (png || svg)
 		libptouch_free_raster(data);
 	else
 		free(data);
--- a/src/lib/libptouch_core.c
+++ b/src/lib/libptouch_core.c
@@ -0,0 +1,100 @@
+/*
+ * libptouch — context, errors, raster validation
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_internal.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void ptouch_set_error(libptouch_ctx *ctx, libptouch_err_t code, const char *msg)
+{
+	if (!ctx)
+		return;
+	ctx->last_code = code;
+	if (msg) {
+		snprintf(ctx->last_msg, sizeof(ctx->last_msg), "%s", msg);
+	} else {
+		ctx->last_msg[0] = '\0';
+	}
+}
+
+void ptouch_set_error_usb(libptouch_ctx *ctx, int libusb_err, const char *what)
+{
+	char buf[256];
+	snprintf(buf, sizeof(buf), "%s: %s", what,
+		 libusb_strerror((enum libusb_error)libusb_err));
+	ptouch_set_error(ctx, LIBPTOUCH_ERR_USB, buf);
+}
+
+libptouch_ctx *libptouch_create(void)
+{
+	libptouch_ctx *ctx = calloc(1, sizeof(*ctx));
+	if (!ctx)
+		return NULL;
+	ctx->last_code = LIBPTOUCH_OK;
+	ctx->last_msg[0] = '\0';
+	ctx->usb_open = 0;
+	ctx->usb_ctx = NULL;
+	ctx->usb_handle = NULL;
+	ctx->claimed_interface = -1;
+	ctx->bulk_out_ep = 0;
+	ctx->bulk_in_ep = 0;
+	return ctx;
+}
+
+void libptouch_destroy(libptouch_ctx *ctx)
+{
+	if (!ctx)
+		return;
+	libptouch_close(ctx);
+	free(ctx);
+}
+
+const char *libptouch_strerror(const libptouch_ctx *ctx)
+{
+	if (!ctx)
+		return "(null ctx)";
+	return ctx->last_msg[0] ? ctx->last_msg : "ok";
+}
+
+libptouch_err_t libptouch_last_error(const libptouch_ctx *ctx)
+{
+	if (!ctx)
+		return LIBPTOUCH_ERR_ARG;
+	return ctx->last_code;
+}
+
+libptouch_err_t libptouch_check_raster(libptouch_ctx *ctx,
+				       const uint8_t *data, size_t data_len,
+				       const libptouch_raster_params_t *params)
+{
+	if (!ctx || !params) {
+		if (ctx)
+			ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "null argument");
+		return LIBPTOUCH_ERR_ARG;
+	}
+	if (!data && data_len > 0) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "data is null but len > 0");
+		return LIBPTOUCH_ERR_ARG;
+	}
+
+	size_t row = (params->width_dots + 7u) / 8u;
+	size_t expected = (size_t)params->height_dots * row;
+	if (data_len != expected) {
+		char buf[160];
+		snprintf(buf, sizeof(buf),
+			 "data_len mismatch: got %zu, expected %zu (w=%u h=%u)",
+			 data_len, expected, params->width_dots,
+			 params->height_dots);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, buf);
+		return LIBPTOUCH_ERR_ARG;
+	}
+
+	ptouch_set_error(ctx, LIBPTOUCH_OK, "");
+	return LIBPTOUCH_OK;
+}
--- a/src/lib/libptouch_internal.h
+++ b/src/lib/libptouch_internal.h
@@ -0,0 +1,43 @@
+/*
+ * libptouch — internal declarations (not installed)
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#ifndef LIBPTOUCH_INTERNAL_H
+#define LIBPTOUCH_INTERNAL_H
+
+#include "libptouch.h"
+
+#include <libusb.h>
+#include <stddef.h>
+
+struct libptouch_ctx {
+	libptouch_err_t last_code;
+	char last_msg[256];
+	int usb_open;
+	struct libusb_context *usb_ctx;
+	struct libusb_device_handle *usb_handle;
+	int claimed_interface; /* -1 if none */
+	uint8_t bulk_out_ep;
+	uint8_t bulk_in_ep;
+	uint16_t usb_pid; /* 0 if USB not open; used to pick 128- vs 560-dot raster */
+};
+
+/* ctx に最終エラー（コードとメッセージ）を記録する。公開 API のエラー返却前に使う。 */
+void ptouch_set_error(libptouch_ctx *ctx, libptouch_err_t code, const char *msg);
+/* libusb のエラー番号を人が読めるメッセージにして ptouch_set_error に渡す。 */
+void ptouch_set_error_usb(libptouch_ctx *ctx, int libusb_err, const char *what);
+
+/* bulk OUT 転送。成功時 0、失敗時 libusb の負のエラーコード。 */
+int ptouch_bulk_out(libusb_device_handle *h, uint8_t ep, const uint8_t *data,
+		    int len, unsigned int timeout_ms);
+/* bulk IN で len バイトを揃えるまで読む。成功時 0、失敗時 libusb の負のエラーコード。 */
+int ptouch_bulk_in_exact(libusb_device_handle *h, uint8_t ep, uint8_t *buf,
+			 int len, unsigned int timeout_ms);
+/* ctx の bulk OUT エンドポイントへ buf を送る。印刷ジョブのチャンク送信用。 */
+libptouch_err_t ptouch_bulk_send_job(libptouch_ctx *ctx, const uint8_t *buf,
+				     size_t len, const char *what);
+
+#endif /* LIBPTOUCH_INTERNAL_H */
--- a/src/lib/libptouch_layout.c
+++ b/src/lib/libptouch_layout.c
@@ -0,0 +1,159 @@
+/*
+ * libptouch — layout tables and profile resolution (Brother raster PDFs)
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_layout.h"
+
+/* --- cv_ptp900_jpn_raster_102.pdf: TZe / その他（HS 以外で共通レイアウトを使う帯） --- */
+static const ptouch_layout_row_t layout_tze_560[] = {
+	{ 0x04, 248, 48, 264 },
+	{ 0x06, 240, 64, 256 },
+	{ 0x09, 219, 106, 235 },
+	{ 0x0C, 197, 150, 213 },
+	{ 0x12, 155, 234, 171 },
+	{ 0x18, 112, 320, 128 },
+	{ 0x24, 45, 454, 61 },
+};
+
+static const ptouch_layout_row_t layout_hs_560[] = {
+	{ 0x06, 244, 56, 260 },
+	{ 0x09, 224, 96, 240 },
+	{ 0x0C, 206, 132, 222 },
+	{ 0x12, 166, 212, 182 },
+	{ 0x18, 144, 256, 160 },
+};
+
+/* --- cv_ptp750w_710bt_jpn_raster_102.pdf --- */
+static const ptouch_layout_row_t layout_tze_128[] = {
+	{ 0x04, 52, 24, 52 },
+	{ 0x06, 48, 32, 48 },
+	{ 0x09, 39, 50, 39 },
+	{ 0x0C, 29, 70, 29 },
+	{ 0x12, 8, 112, 8 },
+	{ 0x18, 0, 128, 0 },
+};
+
+static const ptouch_layout_row_t layout_hs_128[] = {
+	{ 0x06, 50, 28, 50 },
+	{ 0x09, 40, 48, 40 },
+	{ 0x0C, 31, 66, 31 },
+	{ 0x12, 11, 106, 11 },
+	{ 0x18, 0, 128, 0 },
+};
+
+static const uint16_t pids_128pin[] = {
+	LIBPTOUCH_USB_PID_PTP750W,
+	LIBPTOUCH_USB_PID_PTP710BT,
+	0,
+};
+
+static const uint8_t models_128pin[] = {
+	0x68, /* PT-P750W */
+	0x76, /* PT-P710BT */
+	0,
+};
+
+static const ptouch_printer_profile_t ptouch_layout_profiles[] = {
+	{
+		.usb_pids = pids_128pin,
+		.model_codes = models_128pin,
+		.is_default = 0,
+		.head_width_dots = 128u,
+		.margin_feed_dpi = 180.0,
+		.margin_feed_max_dots = 900u,
+		.tze = layout_tze_128,
+		.tze_count = sizeof(layout_tze_128) / sizeof(layout_tze_128[0]),
+		.hs = layout_hs_128,
+		.hs_count = sizeof(layout_hs_128) / sizeof(layout_hs_128[0]),
+		.doc_ref = "cv_ptp750w_710bt_jpn_raster_102.pdf",
+	},
+	{
+		.usb_pids = NULL,
+		.model_codes = NULL,
+		.is_default = 1,
+		.head_width_dots = 560u,
+		.margin_feed_dpi = 360.0,
+		.margin_feed_max_dots = 1800u,
+		.tze = layout_tze_560,
+		.tze_count = sizeof(layout_tze_560) / sizeof(layout_tze_560[0]),
+		.hs = layout_hs_560,
+		.hs_count = sizeof(layout_hs_560) / sizeof(layout_hs_560[0]),
+		.doc_ref = "cv_ptp900_jpn_raster_102.pdf (560-dot family)",
+	},
+};
+
+static int pid_in_list(const uint16_t *list, uint16_t pid)
+{
+	if (!list)
+		return 0;
+	for (; *list; list++) {
+		if (*list == pid)
+			return 1;
+	}
+	return 0;
+}
+
+static int model_in_list(const uint8_t *list, uint8_t code)
+{
+	if (!list)
+		return 0;
+	for (; *list; list++) {
+		if (*list == code)
+			return 1;
+	}
+	return 0;
+}
+
+const ptouch_printer_profile_t *ptouch_layout_resolve_profile(uint16_t usb_pid,
+							      uint8_t status_model_byte)
+{
+	const ptouch_printer_profile_t *fallback = NULL;
+
+	for (size_t i = 0;
+	     i < sizeof(ptouch_layout_profiles) / sizeof(ptouch_layout_profiles[0]);
+	     i++) {
+		const ptouch_printer_profile_t *p = &ptouch_layout_profiles[i];
+		if (p->is_default) {
+			fallback = p;
+			continue;
+		}
+		if (pid_in_list(p->usb_pids, usb_pid) ||
+		    model_in_list(p->model_codes, status_model_byte))
+			return p;
+	}
+	return fallback;
+}
+
+static libptouch_err_t layout_lookup_table(const ptouch_layout_row_t *table, size_t n,
+					   uint8_t media_wbyte, uint16_t *left,
+					   uint16_t *print_dots, uint16_t *right)
+{
+	for (size_t i = 0; i < n; i++) {
+		if (table[i].media_wbyte != media_wbyte)
+			continue;
+		*left = table[i].left_dots;
+		*print_dots = table[i].print_dots;
+		*right = table[i].right_dots;
+		return LIBPTOUCH_OK;
+	}
+	return LIBPTOUCH_ERR_UNSUPPORTED;
+}
+
+libptouch_err_t ptouch_layout_from_status(const ptouch_printer_profile_t *prof,
+					  uint8_t media_kind, uint8_t media_wbyte,
+					  uint16_t *left_dots, uint16_t *print_dots,
+					  uint16_t *right_dots)
+{
+	if (!prof || !left_dots || !print_dots || !right_dots)
+		return LIBPTOUCH_ERR_ARG;
+
+	int is_hs = (media_kind == 0x11u || media_kind == 0x17u);
+	const ptouch_layout_row_t *table = is_hs ? prof->hs : prof->tze;
+	size_t n = is_hs ? prof->hs_count : prof->tze_count;
+
+	return layout_lookup_table(table, n, media_wbyte, left_dots, print_dots,
+				   right_dots);
+}
--- a/src/lib/libptouch_layout.h
+++ b/src/lib/libptouch_layout.h
@@ -0,0 +1,50 @@
+/*
+ * libptouch — tape width → printable dots (data tables per printer family)
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#ifndef LIBPTOUCH_LAYOUT_H
+#define LIBPTOUCH_LAYOUT_H
+
+#include "libptouch.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+/** One row: status byte st[10] (media width code) when it matches this tape width slot */
+typedef struct ptouch_layout_row {
+	uint8_t media_wbyte;
+	uint16_t left_dots;
+	uint16_t print_dots;
+	uint16_t right_dots;
+} ptouch_layout_row_t;
+
+/**
+ * Printer family: USB PID / status model byte select a profile; tables supply layouts.
+ * New models: add a row to @ref ptouch_layout_profiles or add TZe/HS rows to existing tables.
+ */
+typedef struct ptouch_printer_profile {
+	const uint16_t *usb_pids;   /* 0-terminated; NULL = do not match on PID */
+	const uint8_t *model_codes; /* 0-terminated; NULL = do not match on status[4] */
+	int is_default;		    /* 1 = fallback when no other profile matches */
+	unsigned head_width_dots;   /* 128 or 560; full raster width for pack/GF payload */
+	double margin_feed_dpi;     /* ESC i d feed dots per inch (PDF) */
+	unsigned margin_feed_max_dots;
+	const ptouch_layout_row_t *tze;
+	size_t tze_count;
+	const ptouch_layout_row_t *hs;
+	size_t hs_count;
+	const char *doc_ref;
+} ptouch_printer_profile_t;
+
+const ptouch_printer_profile_t *ptouch_layout_resolve_profile(uint16_t usb_pid,
+							      uint8_t status_model_byte);
+
+libptouch_err_t ptouch_layout_from_status(const ptouch_printer_profile_t *prof,
+					  uint8_t media_kind, uint8_t media_wbyte,
+					  uint16_t *left_dots, uint16_t *print_dots,
+					  uint16_t *right_dots);
+
+#endif /* LIBPTOUCH_LAYOUT_H */
--- a/src/lib/libptouch_media_info.c
+++ b/src/lib/libptouch_media_info.c
@@ -0,0 +1,100 @@
+/*
+ * libptouch — current tape/media information helper
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_internal.h"
+#include "libptouch_layout.h"
+
+#include <string.h>
+
+static double tape_width_mm_from_code(uint8_t media_w)
+{
+	switch (media_w) {
+	case 0x04:
+		return 3.5;
+	case 0x06:
+		return 6.0;
+	case 0x09:
+		return 9.0;
+	case 0x0C:
+		return 12.0;
+	case 0x12:
+		return 18.0;
+	case 0x18:
+		return 24.0;
+	case 0x24:
+		return 36.0;
+	case 0x15:
+		return 21.0; /* FLe width code */
+	default:
+		return 0.0;
+	}
+}
+
+static double print_dpi_from_profile(const ptouch_printer_profile_t *prof)
+{
+	if (!prof)
+		return 0.0;
+	if (prof->head_width_dots <= 128u)
+		return 180.0;
+	return 360.0;
+}
+
+libptouch_err_t libptouch_get_current_media_info(libptouch_ctx *ctx,
+						 libptouch_media_info_t *out_info)
+{
+	if (!ctx || !out_info) {
+		if (ctx)
+			ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "null argument");
+		return LIBPTOUCH_ERR_ARG;
+	}
+
+	memset(out_info, 0, sizeof(*out_info));
+
+	uint8_t st[LIBPTOUCH_STATUS_LENGTH];
+	libptouch_err_t v = libptouch_get_status(ctx, st);
+	if (v != LIBPTOUCH_OK)
+		return v;
+
+	const ptouch_printer_profile_t *prof =
+		ptouch_layout_resolve_profile(ctx->usb_pid, st[4]);
+	if (!prof) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+				 "no layout profile for this printer");
+		return LIBPTOUCH_ERR_UNSUPPORTED;
+	}
+
+	uint16_t left_dots = 0, print_dots = 0, right_dots = 0;
+	v = ptouch_layout_from_status(prof, st[11], st[10], &left_dots,
+				      &print_dots, &right_dots);
+	if (v != LIBPTOUCH_OK) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+				 "tape width/layout not supported for this media");
+		return LIBPTOUCH_ERR_UNSUPPORTED;
+	}
+
+	double tape_mm = tape_width_mm_from_code(st[10]);
+	if (tape_mm <= 0.0) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+				 "unknown tape width code");
+		return LIBPTOUCH_ERR_UNSUPPORTED;
+	}
+
+	out_info->media_width_code = st[10];
+	out_info->media_kind_code = st[11];
+	out_info->print_dpi = print_dpi_from_profile(prof);
+	out_info->feed_dpi = prof->margin_feed_dpi;
+	out_info->tape_width_mm = tape_mm;
+	out_info->printable_dots = print_dots;
+	out_info->left_margin_dots = left_dots;
+	out_info->right_margin_dots = right_dots;
+	out_info->min_feed_dots = 14u;
+	out_info->min_feed_mm =
+		((double)out_info->min_feed_dots * 25.4) / prof->margin_feed_dpi;
+
+	ptouch_set_error(ctx, LIBPTOUCH_OK, "");
+	return LIBPTOUCH_OK;
+}
--- a/src/lib/libptouch_png.c
+++ b/src/lib/libptouch_png.c
@@ -0,0 +1,164 @@
+/*
+ * libptouch — PNG → 1bit packed raster (libpng)
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_internal.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <png.h>
+
+void libptouch_free_raster(uint8_t *raster)
+{
+	free(raster);
+}
+
+libptouch_err_t libptouch_png_file_to_raster(libptouch_ctx *ctx, const char *path,
+					     const libptouch_png_options_t *options,
+					     uint8_t **out_raster, size_t *out_raster_bytes,
+					     libptouch_raster_params_t *out_params)
+{
+	if (!ctx || !path || !out_raster || !out_raster_bytes || !out_params) {
+		if (ctx)
+			ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "null argument");
+		return LIBPTOUCH_ERR_ARG;
+	}
+
+	uint8_t thr = LIBPTOUCH_PNG_DEFAULT_THRESHOLD;
+	if (options)
+		thr = options->threshold;
+
+	*out_raster = NULL;
+	*out_raster_bytes = 0;
+	out_params->width_dots = 0;
+	out_params->height_dots = 0;
+	out_params->margin_mm = 0;
+
+	FILE *fp = fopen(path, "rb");
+	if (!fp) {
+		char buf[192];
+		snprintf(buf, sizeof(buf), "open %s: %s", path, strerror(errno));
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IO, buf);
+		return LIBPTOUCH_ERR_IO;
+	}
+
+	unsigned char sig[8];
+	if (fread(sig, 1, 8, fp) != 8) {
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "short read (not a PNG?)");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+	if (png_sig_cmp(sig, 0, 8) != 0) {
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "not a PNG file");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+
+	png_structp png_ptr =
+	    png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+	if (!png_ptr) {
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM, "png_create_read_struct failed");
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+	png_infop info_ptr = png_create_info_struct(png_ptr);
+	if (!info_ptr) {
+		png_destroy_read_struct(&png_ptr, NULL, NULL);
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM, "png_create_info_struct failed");
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+
+	if (setjmp(png_jmpbuf(png_ptr))) {
+		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "PNG decode error");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+
+	png_init_io(png_ptr, fp);
+	png_set_sig_bytes(png_ptr, 8);
+
+	const int transforms = (int)(PNG_TRANSFORM_EXPAND | PNG_TRANSFORM_STRIP_16 |
+				     PNG_TRANSFORM_GRAY_TO_RGB);
+	png_read_png(png_ptr, info_ptr, transforms, NULL);
+
+	png_uint_32 width = png_get_image_width(png_ptr, info_ptr);
+	png_uint_32 height = png_get_image_height(png_ptr, info_ptr);
+	int channels = (int)png_get_channels(png_ptr, info_ptr);
+	png_bytepp rows = png_get_rows(png_ptr, info_ptr);
+
+	if (width == 0 || height == 0 || !rows) {
+		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "invalid PNG dimensions");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+	if (width > 100000u || height > 100000u) {
+		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "PNG dimensions too large");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+	if (channels != 3 && channels != 4) {
+		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "unsupported PNG channel count");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+
+	size_t row_bytes = ((size_t)width + 7u) / 8u;
+	if (height > SIZE_MAX / row_bytes) {
+		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "raster size overflow");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+	size_t total = row_bytes * (size_t)height;
+	uint8_t *out = (uint8_t *)calloc(1, total);
+	if (!out) {
+		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+		fclose(fp);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM, "calloc raster failed");
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+
+	for (png_uint_32 y = 0; y < height; y++) {
+		const png_byte *row = rows[y];
+		uint8_t *dst_row = out + (size_t)y * row_bytes;
+		for (png_uint_32 x = 0; x < width; x++) {
+			size_t o = (size_t)x * (size_t)channels;
+			unsigned r = row[o + 0];
+			unsigned g = row[o + 1];
+			unsigned b = row[o + 2];
+			unsigned a = channels == 4 ? row[o + 3] : 255u;
+			if (a < 128u) {
+				continue;
+			}
+			unsigned yv = (77u * r + 150u * g + 29u * b) >> 8;
+			int black = (yv < (unsigned)thr) ? 1 : 0;
+			if (!black)
+				continue;
+			size_t bit = (size_t)x % 8u;
+			size_t byte = (size_t)x / 8u;
+			dst_row[byte] |= (uint8_t)(1u << (7u - bit));
+		}
+	}
+
+	png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+	fclose(fp);
+
+	out_params->width_dots = (uint32_t)width;
+	out_params->height_dots = (uint32_t)height;
+	out_params->margin_mm = 0;
+	*out_raster = out;
+	*out_raster_bytes = total;
+	ptouch_set_error(ctx, LIBPTOUCH_OK, "");
+	return LIBPTOUCH_OK;
+}
--- a/src/lib/libptouch_print.c
+++ b/src/lib/libptouch_print.c
@@ -0,0 +1,242 @@
+/*
+ * libptouch — raster layout, transpose, P-touch print job (ESC/P bulk)
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_internal.h"
+#include "libptouch_layout.h"
+
+#include <libusb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void pack_line(uint8_t *line, size_t line_bytes, unsigned head_dots,
+		      const uint8_t *row, uint32_t width_dots, uint16_t left_dots,
+		      uint16_t print_dots)
+{
+	memset(line, 0, line_bytes);
+	if (width_dots > (uint32_t)print_dots)
+		return;
+	uint32_t start = (uint32_t)left_dots +
+			 ((uint32_t)print_dots - width_dots) / 2u;
+	for (uint32_t x = 0; x < width_dots; x++) {
+		uint32_t ubyte = x / 8u;
+		uint32_t ubit = 7u - (x % 8u);
+		if (((row[ubyte] >> ubit) & 1u) == 0)
+			continue;
+		uint32_t dot = start + x;
+		if (dot >= (uint32_t)head_dots)
+			break;
+		uint32_t b = dot / 8u;
+		uint32_t bi = 7u - (dot % 8u);
+		line[b] |= (uint8_t)(1u << bi);
+	}
+}
+
+static uint8_t *transpose_raster_alloc(const uint8_t *in, uint32_t W, uint32_t H,
+				      uint32_t *outW, uint32_t *outH)
+{
+	*outW = H;
+	*outH = W;
+	size_t old_rb = (W + 7u) / 8u;
+	size_t new_rb = (H + 7u) / 8u;
+	uint8_t *out = (uint8_t *)calloc(new_rb * W, 1);
+	if (!out)
+		return NULL;
+	for (uint32_t y = 0; y < H; y++) {
+		for (uint32_t x = 0; x < W; x++) {
+			size_t ob = (size_t)y * old_rb + x / 8u;
+			int bit = (int)((in[ob] >> (7u - x % 8u)) & 1u);
+			if (!bit)
+				continue;
+			uint32_t nx = y;
+			uint32_t ny = x;
+			size_t nb = (size_t)ny * new_rb + nx / 8u;
+			out[nb] |= (uint8_t)(1u << (7u - nx % 8u));
+		}
+	}
+	return out;
+}
+
+libptouch_err_t libptouch_print_raster(libptouch_ctx *ctx,
+				       const uint8_t *data, size_t data_len,
+				       const libptouch_raster_params_t *params)
+{
+	libptouch_err_t v =
+	    libptouch_check_raster(ctx, data, data_len, params);
+	if (v != LIBPTOUCH_OK)
+		return v;
+
+	if (!ctx->usb_open || !ctx->bulk_out_ep) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IO, "not connected");
+		return LIBPTOUCH_ERR_IO;
+	}
+
+	uint8_t st[LIBPTOUCH_STATUS_LENGTH];
+	v = libptouch_get_status(ctx, st);
+	if (v != LIBPTOUCH_OK)
+		return v;
+
+	const ptouch_printer_profile_t *prof =
+	    ptouch_layout_resolve_profile(ctx->usb_pid, st[4]);
+	if (!prof) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+				 "no layout profile for this printer");
+		return LIBPTOUCH_ERR_UNSUPPORTED;
+	}
+
+	uint8_t media_kind = st[11];
+	uint8_t media_w = st[10];
+	uint16_t left_dots, print_dots, right_dots;
+	v = ptouch_layout_from_status(prof, media_kind, media_w, &left_dots,
+				      &print_dots, &right_dots);
+	if (v != LIBPTOUCH_OK) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+			  "tape width/layout not supported for this media "
+			  "(check status media bytes)");
+		return LIBPTOUCH_ERR_UNSUPPORTED;
+	}
+	(void)right_dots;
+
+	unsigned head_dots = prof->head_width_dots;
+	size_t line_payload = (size_t)((head_dots + 7u) / 8u);
+	size_t gf_packet = 3u + line_payload;
+
+	uint32_t wd = params->width_dots;
+	uint32_t ht = params->height_dots;
+	uint8_t *transposed = transpose_raster_alloc(data, wd, ht, &wd, &ht);
+	if (!transposed) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM,
+			  "transpose raster: out of memory");
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+	const uint8_t *src = transposed;
+
+	if (wd > (uint32_t)print_dots) {
+		char buf[160];
+		snprintf(buf, sizeof(buf),
+			 "image width %u dots > printable %u for loaded tape",
+			 (unsigned)wd, (unsigned)print_dots);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, buf);
+		free(transposed);
+		return LIBPTOUCH_ERR_ARG;
+	}
+
+	double margin_dpi = prof->margin_feed_dpi;
+	unsigned margin_max = prof->margin_feed_max_dots;
+	unsigned margin_dots = 14u;
+	if (params->margin_mm > 0) {
+		margin_dots = (unsigned)((double)params->margin_mm * margin_dpi /
+						 25.4 +
+					 0.5);
+		if (margin_dots < 14u)
+			margin_dots = 14u;
+		if (margin_dots > margin_max)
+			margin_dots = margin_max;
+	}
+
+	uint32_t lines = ht;
+	uint8_t n5 = (uint8_t)(lines & 0xFFu);
+	uint8_t n6 = (uint8_t)((lines >> 8) & 0xFFu);
+	uint8_t n7 = (uint8_t)((lines >> 16) & 0xFFu);
+	uint8_t n8 = (uint8_t)((lines >> 24) & 0xFFu);
+
+	uint8_t n2_paper = 0x09u;
+	if (media_kind == 0x03u)
+		n2_paper = 0x00u;
+	else if (media_kind == 0x11u)
+		n2_paper = 0x11u;
+	else if (media_kind == 0x17u)
+		n2_paper = 0x17u;
+	else if (media_kind == 0x13u)
+		n2_paper = 0x13u;
+
+	uint8_t head[256];
+	size_t pos = 0;
+	memset(head + pos, 0, 200);
+	pos += 200u;
+	static const uint8_t esc_at[] = { 0x1B, 0x40 };
+	memcpy(head + pos, esc_at, sizeof(esc_at));
+	pos += sizeof(esc_at);
+	static const uint8_t raster_mode[] = { 0x1B, 0x69, 0x61, 0x01 };
+	memcpy(head + pos, raster_mode, sizeof(raster_mode));
+	pos += sizeof(raster_mode);
+
+	uint8_t esc_iz[] = { 0x1B, 0x69, 0x7A, 0x0Eu, n2_paper, media_w,
+			     0x00u, n5,    n6,	  n7,	 n8,	0x02u, 0x00u };
+	memcpy(head + pos, esc_iz, sizeof(esc_iz));
+	pos += sizeof(esc_iz);
+
+	static const uint8_t esc_im[] = { 0x1B, 0x69, 0x4D, 0x40 };
+	memcpy(head + pos, esc_im, sizeof(esc_im));
+	pos += sizeof(esc_im);
+	static const uint8_t esc_ia[] = { 0x1B, 0x69, 0x41, 0x01 };
+	memcpy(head + pos, esc_ia, sizeof(esc_ia));
+	pos += sizeof(esc_ia);
+	static const uint8_t esc_ik[] = { 0x1B, 0x69, 0x4B, 0x0C };
+	memcpy(head + pos, esc_ik, sizeof(esc_ik));
+	pos += sizeof(esc_ik);
+
+	uint8_t esc_id[] = {
+		0x1B, 0x69, 0x64,
+		(uint8_t)(margin_dots & 0xFFu),
+		(uint8_t)((margin_dots >> 8) & 0xFFu)
+	};
+	memcpy(head + pos, esc_id, sizeof(esc_id));
+	pos += sizeof(esc_id);
+
+	static const uint8_t mode_m[] = { 0x4D, 0x00 };
+	memcpy(head + pos, mode_m, sizeof(mode_m));
+	pos += sizeof(mode_m);
+
+	v = ptouch_bulk_send_job(ctx, head, pos, "print preamble");
+	if (v != LIBPTOUCH_OK) {
+		free(transposed);
+		return v;
+	}
+
+	size_t row_b = ((size_t)wd + 7u) / 8u;
+	static const uint8_t g_hdr[] = { 0x47, 0x46, 0x00 };
+
+	uint8_t *gbuf = (uint8_t *)malloc(gf_packet);
+	if (!gbuf) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM,
+				 "raster line buffer");
+		free(transposed);
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+
+	for (uint32_t y = 0; y < lines; y++) {
+		const uint8_t *row = src + (size_t)y * row_b;
+		pack_line(gbuf + 3, line_payload, head_dots, row, wd, left_dots,
+			  print_dots);
+		memcpy(gbuf, g_hdr, sizeof(g_hdr));
+		v = ptouch_bulk_send_job(ctx, gbuf, gf_packet, "raster line");
+		if (v != LIBPTOUCH_OK) {
+			free(gbuf);
+			free(transposed);
+			return v;
+		}
+	}
+	free(gbuf);
+
+	static const uint8_t print_end[] = { 0x1A };
+	v = ptouch_bulk_send_job(ctx, print_end, sizeof(print_end), "print end");
+	if (v != LIBPTOUCH_OK) {
+		free(transposed);
+		return v;
+	}
+
+	uint8_t sink[64];
+	int tr = 0;
+	(void)libusb_bulk_transfer(ctx->usb_handle, ctx->bulk_in_ep, sink,
+				   (int)sizeof(sink), &tr, 3000);
+	(void)tr;
+
+	free(transposed);
+	ptouch_set_error(ctx, LIBPTOUCH_OK, "");
+	return LIBPTOUCH_OK;
+}
--- a/src/lib/libptouch_status.c
+++ b/src/lib/libptouch_status.c
@@ -0,0 +1,438 @@
+/*
+ * libptouch — printer status (ESC i S) and human-readable dump
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_internal.h"
+
+#include <stdio.h>
+#include <string.h>
+
+libptouch_err_t libptouch_get_status(libptouch_ctx *ctx, uint8_t *status)
+{
+	if (!ctx || !status) {
+		if (ctx)
+			ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "null argument");
+		return LIBPTOUCH_ERR_ARG;
+	}
+	if (!ctx->usb_handle || !ctx->bulk_out_ep || !ctx->bulk_in_ep) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IO,
+			  "USB not open or bulk endpoints missing");
+		return LIBPTOUCH_ERR_IO;
+	}
+
+	libusb_device_handle *h = ctx->usb_handle;
+	static const uint8_t init[] = { 0x1B, 0x40 };
+	static const uint8_t req[] = { 0x1B, 0x69, 0x53 };
+
+	int r = LIBUSB_ERROR_OTHER;
+	for (int attempt = 0; attempt < 2; attempt++) {
+		if (attempt > 0) {
+			(void)libusb_clear_halt(h, ctx->bulk_in_ep);
+			(void)libusb_clear_halt(h, ctx->bulk_out_ep);
+		}
+		r = ptouch_bulk_out(h, ctx->bulk_out_ep, init, 2, 5000u);
+		if (r != 0) {
+			ptouch_set_error_usb(ctx, r, "bulk OUT ESC @");
+			return LIBPTOUCH_ERR_USB;
+		}
+		r = ptouch_bulk_out(h, ctx->bulk_out_ep, req, 3, 5000u);
+		if (r != 0) {
+			ptouch_set_error_usb(ctx, r, "bulk OUT ESC i S");
+			return LIBPTOUCH_ERR_USB;
+		}
+		r = ptouch_bulk_in_exact(h, ctx->bulk_in_ep, status,
+				  (int)LIBPTOUCH_STATUS_LENGTH, 5000u);
+		if (r == 0)
+			break;
+		if (r != LIBUSB_ERROR_IO && r != LIBUSB_ERROR_PIPE)
+			break;
+	}
+	if (r != 0) {
+		ptouch_set_error_usb(ctx, r, "bulk IN status");
+		return LIBPTOUCH_ERR_USB;
+	}
+
+	ptouch_set_error(ctx, LIBPTOUCH_OK, "");
+	return LIBPTOUCH_OK;
+}
+
+static void fprint_model(FILE *fp, uint8_t code)
+{
+	const char *name = "unknown";
+	switch (code) {
+	case 0x6F:
+		name = "PT-P900W";
+		break;
+	case 0x70:
+		name = "PT-P950NW";
+		break;
+	case 0x71:
+		name = "PT-P900";
+		break;
+	case 0x78:
+		name = "PT-P910BT";
+		break;
+	case 0x68:
+		name = "PT-P750W";
+		break;
+	case 0x76:
+		name = "PT-P710BT";
+		break;
+	default:
+		break;
+	}
+	fprintf(fp, "機種コード: 0x%02X ('%c') — %s\n", (unsigned)code,
+		(code >= 32 && code < 127) ? (char)code : '?', name);
+}
+
+static void fprint_media_width(FILE *fp, uint8_t w, uint8_t len_byte)
+{
+	const char *desc = NULL;
+	switch (w) {
+	case 0x00:
+		desc = "テープなし / 未装着";
+		break;
+	case 0x04:
+		desc = "3.5 mm";
+		break;
+	case 0x06:
+		desc = "6 mm";
+		break;
+	case 0x09:
+		desc = "9 mm";
+		break;
+	case 0x0C:
+		desc = "12 mm";
+		break;
+	case 0x12:
+		desc = "18 mm";
+		break;
+	case 0x18:
+		desc = "24 mm";
+		break;
+	case 0x24:
+		desc = "36 mm";
+		break;
+	case 0x15:
+		desc = "FLe 21 mm 幅（長さはメディア長バイト参照）";
+		break;
+	default:
+		break;
+	}
+	if (desc)
+		fprintf(fp, "メディア幅: 0x%02X — %s\n", (unsigned)w, desc);
+	else
+		fprintf(fp, "メディア幅: 0x%02X\n", (unsigned)w);
+	if (w == 0x15 && len_byte != 0)
+		fprintf(fp, "メディア長: 0x%02X (%u mm 相当の表記参照)\n",
+			(unsigned)len_byte, (unsigned)len_byte);
+}
+
+static void fprint_media_kind(FILE *fp, uint8_t k)
+{
+	const char *desc = NULL;
+	switch (k) {
+	case 0x00:
+		desc = "テープなし";
+		break;
+	case 0x01:
+		desc = "ラミネートテープ";
+		break;
+	case 0x03:
+		desc = "ノンラミネートテープ";
+		break;
+	case 0x04:
+		desc = "ファブリックテープ";
+		break;
+	case 0x11:
+		desc = "ヒートシュリンクチューブ (HS 2:1)";
+		break;
+	case 0x13:
+		desc = "FLe テープ";
+		break;
+	case 0x14:
+		desc = "フレキシブルＩＤテープ";
+		break;
+	case 0x15:
+		desc = "サテンテープ";
+		break;
+	case 0x17:
+		desc = "ヒートシュリンクチューブ (HS 3:1)";
+		break;
+	case 0xFF:
+		desc = "非対応テープ";
+		break;
+	default:
+		break;
+	}
+	if (desc)
+		fprintf(fp, "テープ種類: 0x%02X — %s\n", (unsigned)k, desc);
+	else
+		fprintf(fp, "テープ種類: 0x%02X\n", (unsigned)k);
+}
+
+static void fprint_battery(FILE *fp, uint8_t b)
+{
+	const char *desc = NULL;
+	switch (b) {
+	case 0x00:
+		desc = "フル";
+		break;
+	case 0x01:
+		desc = "ハーフ";
+		break;
+	case 0x02:
+		desc = "ロー";
+		break;
+	case 0x03:
+		desc = "要充電";
+		break;
+	case 0x04:
+		desc = "AC アダプター使用中";
+		break;
+	case 0xFF:
+		desc = "不明";
+		break;
+	default:
+		break;
+	}
+	if (desc)
+		fprintf(fp, "電池残量: 0x%02X — %s\n", (unsigned)b, desc);
+	else
+		fprintf(fp, "電池残量: 0x%02X (PT-P910BT 等は別表参照)\n",
+			(unsigned)b);
+}
+
+static void fprint_tape_color(FILE *fp, uint8_t c)
+{
+	const char *desc = NULL;
+	switch (c) {
+	case 0x01:
+		desc = "白 (White)";
+		break;
+	case 0x02:
+		desc = "その他 (Other)";
+		break;
+	case 0x03:
+		desc = "透明 (Clear)";
+		break;
+	case 0x04:
+		desc = "赤 (Red)";
+		break;
+	case 0x05:
+		desc = "青 (Blue)";
+		break;
+	case 0x06:
+		desc = "黄 (Yellow)";
+		break;
+	case 0x07:
+		desc = "緑 (Green)";
+		break;
+	case 0x08:
+		desc = "黒 (Black)";
+		break;
+	case 0x09:
+		desc = "透明（文字白）";
+		break;
+	case 0x20:
+		desc = "白（マット） (Matte White)";
+		break;
+	case 0x21:
+		desc = "透明（マット） (Matte Clear)";
+		break;
+	case 0x22:
+		desc = "銀（マット） (Matte Silver)";
+		break;
+	case 0x23:
+		desc = "金（サテン） (Satin Gold)";
+		break;
+	case 0x24:
+		desc = "銀（サテン） (Satin Silver)";
+		break;
+	case 0x30:
+		desc = "青（D）";
+		break;
+	case 0x31:
+		desc = "赤（D）";
+		break;
+	case 0x40:
+		desc = "オレンジ（蛍光）";
+		break;
+	case 0x41:
+		desc = "黄（蛍光）";
+		break;
+	case 0x50:
+		desc = "ピンク（S）";
+		break;
+	case 0x51:
+		desc = "グレー（S）";
+		break;
+	case 0x52:
+		desc = "グリーン（S）";
+		break;
+	case 0x60:
+		desc = "イエロー（F）";
+		break;
+	case 0x61:
+		desc = "ピンク（F）";
+		break;
+	case 0x62:
+		desc = "ブルー（F）";
+		break;
+	case 0x70:
+		desc = "白（チューブ）";
+		break;
+	case 0x90:
+		desc = "白（フレキ）";
+		break;
+	case 0x91:
+		desc = "黄（フレキ）";
+		break;
+	case 0xF0:
+		desc = "クリーニング";
+		break;
+	case 0xF1:
+		desc = "ステンシル";
+		break;
+	case 0xFF:
+		desc = "非対応";
+		break;
+	default:
+		break;
+	}
+	if (desc)
+		fprintf(fp, "テープ色: 0x%02X — %s\n", (unsigned)c, desc);
+	else
+		fprintf(fp, "テープ色: 0x%02X\n", (unsigned)c);
+}
+
+static void fprint_status_kind(FILE *fp, uint8_t s)
+{
+	const char *desc = NULL;
+	switch (s) {
+	case 0x00:
+		desc = "印刷終了";
+		break;
+	case 0x01:
+		desc = "エラー発生";
+		break;
+	case 0x02:
+		desc = "IF モード終了";
+		break;
+	case 0x03:
+		desc = "パワーオフ（未使用扱い）";
+		break;
+	case 0x04:
+		desc = "通知";
+		break;
+	case 0x05:
+		desc = "フェーズ変更";
+		break;
+	default:
+		break;
+	}
+	if (desc)
+		fprintf(fp, "ステータス種類: 0x%02X — %s\n", (unsigned)s, desc);
+	else
+		fprintf(fp, "ステータス種類: 0x%02X\n", (unsigned)s);
+}
+
+void libptouch_status_fprint(FILE *fp, const uint8_t *status)
+{
+	if (!fp || !status)
+		return;
+
+	fprintf(fp, "=== P-touch ステータス (32 バイト) ===\n");
+	if (status[0] != 0x80u || status[1] != 0x20u)
+		fprintf(fp,
+			"※ 先頭マーク異常: [0]=0x%02X [1]=0x%02X (通常 80 20)\n",
+			(unsigned)status[0], (unsigned)status[1]);
+
+	fprintf(fp, "ヘッダ: 0x%02X 0x%02X\n", (unsigned)status[0],
+		(unsigned)status[1]);
+	fprintf(fp, "Brother コード: %c (0x%02X)\n",
+		(status[2] >= 32 && status[2] < 127) ? (char)status[2] : '?',
+		(unsigned)status[2]);
+	fprint_model(fp, status[4]);
+	fprintf(fp, "国別コード: %c\n",
+		(status[5] >= 32 && status[5] < 127) ? (char)status[5] : '?');
+
+	fprint_battery(fp, status[6]);
+
+	if (status[7] != 0) {
+		fprintf(fp, "拡張エラー: 0x%02X", (unsigned)status[7]);
+		switch (status[7]) {
+		case 0x10:
+			fprintf(fp, " — FLE のテープエンド");
+			break;
+		case 0x1D:
+			fprintf(fp, " — 高解像度/ドラフト印刷エラー");
+			break;
+		case 0x1E:
+			fprintf(fp, " — アダプター抜き挿しエラー");
+			break;
+		case 0x21:
+			fprintf(fp, " — 非対応メディアエラー");
+			break;
+		default:
+			break;
+		}
+		fprintf(fp, "\n");
+	} else {
+		fprintf(fp, "拡張エラー: なし (0x00)\n");
+	}
+
+	fprintf(fp, "エラー情報1: 0x%02X\n", (unsigned)status[8]);
+	if (status[8] & 0x01)
+		fprintf(fp, "  - メディア無し\n");
+	if (status[8] & 0x02)
+		fprintf(fp, "  - メディア終了\n");
+	if (status[8] & 0x04)
+		fprintf(fp, "  - カッタージャム\n");
+	if (status[8] & 0x08)
+		fprintf(fp, "  - バッテリー弱\n");
+	if (status[8] & 0x40)
+		fprintf(fp, "  - 高圧アダプター\n");
+
+	fprintf(fp, "エラー情報2: 0x%02X\n", (unsigned)status[9]);
+	if (status[9] & 0x01)
+		fprintf(fp, "  - メディア交換（メディア違い）\n");
+	if (status[9] & 0x04)
+		fprintf(fp, "  - 通信エラー\n");
+	if (status[9] & 0x08)
+		fprintf(fp, "  - 通信バッファーフル\n");
+	if (status[9] & 0x10)
+		fprintf(fp, "  - カバーオープン\n");
+	if (status[9] & 0x20)
+		fprintf(fp, "  - 高温エラー\n");
+	if (status[9] & 0x40)
+		fprintf(fp, "  - 先端検出エラー\n");
+	if (status[9] & 0x80)
+		fprintf(fp, "  - システムエラー\n");
+
+	fprint_media_width(fp, status[10], status[17]);
+	fprint_media_kind(fp, status[11]);
+	fprintf(fp, "色数: 0x%02X  フォント/日本語フォント: 0x%02X / 0x%02X\n",
+		(unsigned)status[12], (unsigned)status[13],
+		(unsigned)status[14]);
+	fprintf(fp, "モード: 0x%02X  濃度: 0x%02X\n", (unsigned)status[15],
+		(unsigned)status[16]);
+
+	fprint_status_kind(fp, status[18]);
+	fprintf(fp, "フェーズ種類: 0x%02X  フェーズ番号: %02X %02X\n",
+		(unsigned)status[19], (unsigned)status[20],
+		(unsigned)status[21]);
+	fprintf(fp, "通知番号: 0x%02X\n", (unsigned)status[22]);
+	fprintf(fp, "拡張部バイト数: 0x%02X\n", (unsigned)status[23]);
+
+	fprint_tape_color(fp, status[24]);
+	fprintf(fp, "文字色: 0x%02X\n", (unsigned)status[25]);
+
+	fprintf(fp, "生データ: ");
+	for (unsigned i = 0; i < LIBPTOUCH_STATUS_LENGTH; i++)
+		fprintf(fp, "%02X%s", (unsigned)status[i],
+			i + 1 == LIBPTOUCH_STATUS_LENGTH ? "\n" : " ");
+}
--- a/src/lib/libptouch_svg.c
+++ b/src/lib/libptouch_svg.c
@@ -0,0 +1,211 @@
+/*
+ * libptouch — SVG -> 1bit packed raster (librsvg + cairo)
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_internal.h"
+#include "libptouch_layout.h"
+
+#ifdef LIBPTOUCH_HAS_RSVG
+#include <cairo.h>
+#include <librsvg/rsvg.h>
+#endif
+
+#include <math.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+libptouch_err_t libptouch_svg_file_to_raster_fit_current_tape(
+	libptouch_ctx *ctx, const char *path,
+	const libptouch_svg_options_t *options, uint8_t **out_raster,
+	size_t *out_raster_bytes, libptouch_raster_params_t *out_params)
+{
+#ifndef LIBPTOUCH_HAS_RSVG
+	(void)path;
+	(void)options;
+	(void)out_raster;
+	(void)out_raster_bytes;
+	(void)out_params;
+	if (ctx) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+				 "SVG support is not built in (missing librsvg-2.0)");
+	}
+	return LIBPTOUCH_ERR_UNSUPPORTED;
+#else
+	if (!ctx || !path || !out_raster || !out_raster_bytes || !out_params) {
+		if (ctx)
+			ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "null argument");
+		return LIBPTOUCH_ERR_ARG;
+	}
+	if (!ctx->usb_open || !ctx->bulk_out_ep) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IO,
+				 "not connected (open USB before SVG conversion)");
+		return LIBPTOUCH_ERR_IO;
+	}
+
+	uint8_t thr = LIBPTOUCH_PNG_DEFAULT_THRESHOLD;
+	if (options)
+		thr = options->threshold;
+
+	*out_raster = NULL;
+	*out_raster_bytes = 0;
+	out_params->width_dots = 0;
+	out_params->height_dots = 0;
+	out_params->margin_mm = 0;
+
+	uint8_t st[LIBPTOUCH_STATUS_LENGTH];
+	libptouch_err_t v = libptouch_get_status(ctx, st);
+	if (v != LIBPTOUCH_OK)
+		return v;
+
+	const ptouch_printer_profile_t *prof =
+		ptouch_layout_resolve_profile(ctx->usb_pid, st[4]);
+	if (!prof) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+				 "no layout profile for this printer");
+		return LIBPTOUCH_ERR_UNSUPPORTED;
+	}
+
+	uint16_t left_dots = 0, print_dots = 0, right_dots = 0;
+	v = ptouch_layout_from_status(prof, st[11], st[10], &left_dots,
+				      &print_dots, &right_dots);
+	if (v != LIBPTOUCH_OK) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_UNSUPPORTED,
+				 "tape width/layout not supported for this media");
+		return LIBPTOUCH_ERR_UNSUPPORTED;
+	}
+	(void)left_dots;
+	(void)right_dots;
+
+	GError *gerr = NULL;
+	RsvgHandle *handle = rsvg_handle_new_from_file(path, &gerr);
+	if (!handle) {
+		const char *msg = (gerr && gerr->message) ? gerr->message :
+							    "failed to load SVG";
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, msg);
+		if (gerr)
+			g_error_free(gerr);
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+
+	double svg_w = 0.0;
+	double svg_h = 0.0;
+	if (!rsvg_handle_get_intrinsic_size_in_pixels(handle, &svg_w, &svg_h) ||
+	    svg_w <= 0.0 || svg_h <= 0.0) {
+		g_object_unref(handle);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE,
+				 "invalid SVG dimensions");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+
+	/*
+	 * libptouch_print_raster() transposes the incoming raster before packing
+	 * lines, so printable tape width maps to the source raster height.
+	 */
+	double scale = (double)print_dots / svg_h;
+	if (scale <= 0.0 || !isfinite(scale)) {
+		g_object_unref(handle);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "invalid SVG scale");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+
+	uint32_t out_h = (uint32_t)print_dots;
+	uint32_t out_w = (uint32_t)ceil(svg_w * scale);
+	if (out_h == 0)
+		out_h = 1;
+	if (out_h > 100000u) {
+		g_object_unref(handle);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "scaled SVG too tall");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+
+	cairo_surface_t *surface = cairo_image_surface_create(
+		CAIRO_FORMAT_ARGB32, (int)out_w, (int)out_h);
+	if (cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
+		cairo_surface_destroy(surface);
+		g_object_unref(handle);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM,
+				 "cairo_image_surface_create failed");
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+
+	cairo_t *cr = cairo_create(surface);
+	if (cairo_status(cr) != CAIRO_STATUS_SUCCESS) {
+		cairo_destroy(cr);
+		cairo_surface_destroy(surface);
+		g_object_unref(handle);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM, "cairo_create failed");
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+
+	cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
+	cairo_paint(cr);
+	RsvgRectangle viewport = { 0.0, 0.0, (double)out_w, (double)out_h };
+	GError *render_err = NULL;
+	if (!rsvg_handle_render_document(handle, cr, &viewport, &render_err)) {
+		cairo_destroy(cr);
+		cairo_surface_destroy(surface);
+		g_object_unref(handle);
+		const char *msg = (render_err && render_err->message) ?
+					    render_err->message :
+					    "SVG render failed";
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, msg);
+		if (render_err)
+			g_error_free(render_err);
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+	cairo_destroy(cr);
+	g_object_unref(handle);
+
+	cairo_surface_flush(surface);
+	int stride = cairo_image_surface_get_stride(surface);
+	const uint8_t *pix = cairo_image_surface_get_data(surface);
+
+	size_t row_bytes = ((size_t)out_w + 7u) / 8u;
+	if (out_h > SIZE_MAX / row_bytes) {
+		cairo_surface_destroy(surface);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_IMAGE, "raster size overflow");
+		return LIBPTOUCH_ERR_IMAGE;
+	}
+	size_t total = row_bytes * (size_t)out_h;
+	uint8_t *out = (uint8_t *)calloc(1, total);
+	if (!out) {
+		cairo_surface_destroy(surface);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOMEM, "calloc raster failed");
+		return LIBPTOUCH_ERR_NOMEM;
+	}
+
+	for (uint32_t y = 0; y < out_h; y++) {
+		const uint32_t *src_row =
+			(const uint32_t *)(pix + (size_t)y * (size_t)stride);
+		uint8_t *dst_row = out + (size_t)y * row_bytes;
+		for (uint32_t x = 0; x < out_w; x++) {
+			uint32_t p = src_row[x];
+			unsigned a = (p >> 24) & 0xFFu;
+			if (a < 128u)
+				continue;
+			unsigned r = (p >> 16) & 0xFFu;
+			unsigned g = (p >> 8) & 0xFFu;
+			unsigned b = p & 0xFFu;
+			unsigned yv = (77u * r + 150u * g + 29u * b) >> 8;
+			if (yv >= (unsigned)thr)
+				continue;
+			size_t byte = (size_t)x / 8u;
+			size_t bit = (size_t)x % 8u;
+			dst_row[byte] |= (uint8_t)(1u << (7u - bit));
+		}
+	}
+
+	cairo_surface_destroy(surface);
+
+	out_params->width_dots = out_w;
+	out_params->height_dots = out_h;
+	out_params->margin_mm = 0;
+	*out_raster = out;
+	*out_raster_bytes = total;
+	ptouch_set_error(ctx, LIBPTOUCH_OK, "");
+	return LIBPTOUCH_OK;
+#endif
+}
--- a/src/lib/libptouch_usb.c
+++ b/src/lib/libptouch_usb.c
@@ -0,0 +1,198 @@
+/*
+ * libptouch — USB (libusb): open/close, bulk transfers
+ *
+ * Author: knb
+ * Email: knb@artif.org
+ */
+
+#include "libptouch_internal.h"
+
+#include <stdio.h>
+#include <string.h>
+
+/**
+ * バルク IN/OUT を両方持つインタフェースを探して claim する。
+ * USB Printer クラス (bInterfaceClass==7) を優先する。
+ */
+static int claim_interface_with_bulk(libusb_device_handle *h, int *out_iface,
+				     uint8_t *out_ep, uint8_t *in_ep)
+{
+	libusb_device *dev = libusb_get_device(h);
+	struct libusb_config_descriptor *cfg = NULL;
+	int r = libusb_get_active_config_descriptor(dev, &cfg);
+	if (r != 0 || !cfg)
+		return -1;
+
+	for (int pass = 0; pass < 2; pass++) {
+		for (int i = 0; i < cfg->bNumInterfaces; i++) {
+			const struct libusb_interface_descriptor *alt =
+			    &cfg->interface[i].altsetting[0];
+			if (pass == 0 &&
+			    alt->bInterfaceClass != LIBUSB_CLASS_PRINTER)
+				continue;
+
+			uint8_t ep_out = 0, ep_in = 0;
+			for (uint8_t k = 0; k < alt->bNumEndpoints; k++) {
+				const struct libusb_endpoint_descriptor *ep =
+				    &alt->endpoint[k];
+				if ((ep->bmAttributes &
+				     LIBUSB_TRANSFER_TYPE_MASK) ==
+				    LIBUSB_TRANSFER_TYPE_BULK) {
+					if (ep->bEndpointAddress &
+					    LIBUSB_ENDPOINT_IN)
+						ep_in = ep->bEndpointAddress;
+					else
+						ep_out = ep->bEndpointAddress;
+				}
+			}
+			if (!ep_out || !ep_in)
+				continue;
+			r = libusb_claim_interface(h, i);
+			if (r == 0) {
+				*out_iface = i;
+				*out_ep = ep_out;
+				*in_ep = ep_in;
+				libusb_free_config_descriptor(cfg);
+				return 0;
+			}
+		}
+	}
+	libusb_free_config_descriptor(cfg);
+	return -1;
+}
+
+libptouch_err_t libptouch_open_usb_vid_pid(libptouch_ctx *ctx, uint16_t vid,
+					   uint16_t pid)
+{
+	if (!ctx) {
+		return LIBPTOUCH_ERR_ARG;
+	}
+	if (ctx->usb_handle) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_ARG, "USB already open");
+		return LIBPTOUCH_ERR_ARG;
+	}
+
+	int r = libusb_init(&ctx->usb_ctx);
+	if (r != LIBUSB_SUCCESS) {
+		ptouch_set_error_usb(ctx, r, "libusb_init");
+		ctx->usb_ctx = NULL;
+		return LIBPTOUCH_ERR_USB;
+	}
+
+	libusb_device_handle *h =
+	    libusb_open_device_with_vid_pid(ctx->usb_ctx, vid, pid);
+	if (!h) {
+		libusb_exit(ctx->usb_ctx);
+		ctx->usb_ctx = NULL;
+		char buf[160];
+		snprintf(buf, sizeof(buf),
+			 "no USB device 0x%04x:0x%04x (check cable, power, udev)",
+			 (unsigned)vid, (unsigned)pid);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_NOT_FOUND, buf);
+		return LIBPTOUCH_ERR_NOT_FOUND;
+	}
+	ctx->usb_handle = h;
+
+#if defined(LIBUSB_API_VERSION) && (LIBUSB_API_VERSION >= 0x01000106)
+	(void)libusb_set_auto_detach_kernel_driver(h, 1);
+#endif
+
+	if (claim_interface_with_bulk(h, &ctx->claimed_interface,
+				      &ctx->bulk_out_ep, &ctx->bulk_in_ep) != 0) {
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_USB,
+			  "no bulk IN/OUT interface (permissions or driver?)");
+		libusb_close(h);
+		ctx->usb_handle = NULL;
+		libusb_exit(ctx->usb_ctx);
+		ctx->usb_ctx = NULL;
+		return LIBPTOUCH_ERR_USB;
+	}
+
+	(void)libusb_clear_halt(h, ctx->bulk_out_ep);
+	(void)libusb_clear_halt(h, ctx->bulk_in_ep);
+
+	ctx->usb_pid = pid;
+	ctx->usb_open = 1;
+	ptouch_set_error(ctx, LIBPTOUCH_OK, "");
+	return LIBPTOUCH_OK;
+}
+
+libptouch_err_t libptouch_open_usb(libptouch_ctx *ctx)
+{
+	return libptouch_open_usb_vid_pid(ctx, LIBPTOUCH_USB_VID_BROTHER,
+					  LIBPTOUCH_USB_PID_PTP900W);
+}
+
+void libptouch_close(libptouch_ctx *ctx)
+{
+	if (!ctx)
+		return;
+	if (ctx->usb_handle) {
+		if (ctx->claimed_interface >= 0) {
+			(void)libusb_release_interface(ctx->usb_handle,
+						       ctx->claimed_interface);
+			ctx->claimed_interface = -1;
+		}
+		libusb_close(ctx->usb_handle);
+		ctx->usb_handle = NULL;
+	}
+	if (ctx->usb_ctx) {
+		libusb_exit(ctx->usb_ctx);
+		ctx->usb_ctx = NULL;
+	}
+	ctx->bulk_out_ep = 0;
+	ctx->bulk_in_ep = 0;
+	ctx->usb_pid = 0;
+	ctx->usb_open = 0;
+}
+
+int ptouch_bulk_out(libusb_device_handle *h, uint8_t ep, const uint8_t *data,
+		    int len, unsigned int timeout_ms)
+{
+	int tr = 0;
+	int r = libusb_bulk_transfer(h, ep, (unsigned char *)data, len, &tr,
+				     (int)timeout_ms);
+	if (r != 0)
+		return r;
+	if (tr != len)
+		return LIBUSB_ERROR_IO;
+	return 0;
+}
+
+int ptouch_bulk_in_exact(libusb_device_handle *h, uint8_t ep, uint8_t *buf,
+			 int len, unsigned int timeout_ms)
+{
+	int got = 0;
+	while (got < len) {
+		int tr = 0;
+		int r = libusb_bulk_transfer(h, ep, buf + got, len - got, &tr,
+					     (int)timeout_ms);
+		if (r != 0)
+			return r;
+		if (tr == 0)
+			return LIBUSB_ERROR_IO;
+		got += tr;
+	}
+	return 0;
+}
+
+libptouch_err_t ptouch_bulk_send_job(libptouch_ctx *ctx, const uint8_t *buf,
+				     size_t len, const char *what)
+{
+	int tr = 0;
+	int r = libusb_bulk_transfer(ctx->usb_handle, ctx->bulk_out_ep,
+				     (unsigned char *)buf, (int)len, &tr,
+				     120000);
+	if (r != 0) {
+		ptouch_set_error_usb(ctx, r, what);
+		return LIBPTOUCH_ERR_USB;
+	}
+	if ((size_t)tr != len) {
+		char msg[96];
+		snprintf(msg, sizeof(msg), "%s: short write %d/%zu", what, tr,
+			 len);
+		ptouch_set_error(ctx, LIBPTOUCH_ERR_USB, msg);
+		return LIBPTOUCH_ERR_USB;
+	}
+	return LIBPTOUCH_OK;
+}
--- a/src/libptouch.c
+++ b/src/libptouch.c
--- a/udev/99-ptouch-label-brother.rules
+++ b/udev/99-ptouch-label-brother.rules
@@ -1,5 +1,6 @@
 # Brother P-touch — libusb でユーザから開けるようにする (Ubuntu 等)
 # PT-P900W: lsusb で ID 04f9:2085
+# PT-P750W: 04f9:2062  PT-P710BT: 04f9:20af（Brother ラスター PDF Appendix A）
 #
 # 設置:
 #   sudo cp udev/99-ptouch-label-brother.rules /etc/udev/rules.d/
@@ -11,6 +12,8 @@
 # GROUP=plugdev … 従来どおり plugdev に所属していれば読み書き可

 SUBSYSTEM=="usb", ATTR{idVendor}=="04f9", ATTR{idProduct}=="2085", MODE="0660", GROUP="plugdev", TAG+="uaccess"
+SUBSYSTEM=="usb", ATTR{idVendor}=="04f9", ATTR{idProduct}=="2062", MODE="0660", GROUP="plugdev", TAG+="uaccess"
+SUBSYSTEM=="usb", ATTR{idVendor}=="04f9", ATTR{idProduct}=="20af", MODE="0660", GROUP="plugdev", TAG+="uaccess"

 # 他機種を使う場合は lsusb の ID を足す例（コメントを外して複製）:
 # SUBSYSTEM=="usb", ATTR{idVendor}=="04f9", ATTR{idProduct}=="2086", MODE="0660", GROUP="plugdev", TAG+="uaccess"
Author	SHA1	Message	Date
knb	d683bf983a	internalヘッダに関数説明コメントを追加 libptouch_internal.h の内部関数宣言に用途と戻り値の簡潔な説明を付け、実装読解時の確認コストを下げる。 Made-with: Cursor	2026-04-16 13:54:36 +09:00
knb	28a0c73f6a	SVGサンプルファイルを追加 SVG印刷機能の動作確認に使えるサンプル画像を同梱し、dry-runや実機テストをすぐ試せるようにする。 Made-with: Cursor	2026-04-14 18:30:05 +09:00
knb	2ed0bfc0be	SVG印刷対応とメディア情報APIを追加 SVG入力を現在テープ幅に自動フィットして印刷できるようにし、アプリ側が余白計算できるようにテープ幅・DPI・最小送り量を取得するAPIを追加する。 Made-with: Cursor	2026-04-14 18:29:24 +09:00
knb	f26a1186a3	libptouch の更新に追従	2026-04-13 11:39:31 +09:00
knb	ae67a8b288	PT-P750W, PT-P710BT のラスターコマンドマニュアル追加	2026-04-13 09:47:44 +09:00
knb	add08ba9b2	libptouch を複数ソースに分割し src/lib に配置 - core / usb / print / status / png と libptouch_internal.h に分割 - 旧単一ファイル src/libptouch.c を削除 - CMake のソース一覧と include パスを更新 - README・libptouch.h の参照パスを追随 Made-with: Cursor	2026-04-13 09:43:42 +09:00
knb	fdcb4d97fa	aB.png を samples/ に移動 Made-with: Cursor	2026-04-12 16:09:41 +09:00
knb	c5c7c2ba52	ruby binding 追加 - FFI gem (libptouch)、exe ptouch-print-png（PNG のみ） - ステータス 32 バイトを Hash に展開（parse_status / status_hash） - CMake: libptouch 共有ライブラリ（ptouch_shared） - RuboCop、gemspec（homepage / source_code_uri） Made-with: Cursor	2026-04-12 16:06:50 +09:00