Fix PT-P710BT raster protocol handling and add regression coverage.

Align print command payload generation with model-specific protocol requirements, add verbose CLI diagnostics and robust status retries, and introduce protocol regression tests to prevent future GF/ESC i z regressions.

Made-with: Cursor

src/cli/main.c

@@ -24,6 +24,7 @@ static void usage(const char *argv0)
 		"  -t, --threshold N  しきい値 0–255（既定 %u、PNG/SVG）\n"
 		"      --trim-right[=DOTS] 右側空白を削減（省略時は左余白、失敗時 0）\n"
 		"  -n, --dry-run       読み込みと check_raster のみ（USB なし）\n"
+		"  -v, --verbose       印刷前情報と印刷後ステータスを標準出力\n"
 		"  -p, --pid HEX       USB 製品 ID（既定: P900W の 0x2085）。例: P750W 0x2062、P710BT 0x20af\n"
 		"  -S, --status        ステータスを表示して終了\n"
 		"  -V, --version       バージョンを表示して終了\n"
@@ -101,6 +102,53 @@ static int read_file(const char *path, uint8_t **out, size_t *out_len)
 	return 0;
 }
 
+static void verbose_print_pre_print_info(libptouch_ctx *ctx,
+					 const libptouch_raster_params_t *params,
+					 size_t data_len)
+{
+	if (!ctx || !params)
+		return;
+
+	printf("=== verbose: pre-print info ===\n");
+	printf("raster bytes: %zu\n", data_len);
+	printf("raster size: %ux%u dots (length x width)\n",
+	       (unsigned)params->width_dots, (unsigned)params->height_dots);
+	printf("margin_mm: %u\n", (unsigned)params->margin_mm);
+
+	libptouch_media_info_t mi;
+	if (libptouch_get_current_media_info(ctx, &mi) == LIBPTOUCH_OK) {
+		printf("media width code: 0x%02X\n", (unsigned)mi.media_width_code);
+		printf("media kind code: 0x%02X\n", (unsigned)mi.media_kind_code);
+		printf("tape width: %.1f mm\n", mi.tape_width_mm);
+		printf("printable dots: %u\n", (unsigned)mi.printable_dots);
+		printf("left/right margins: %u/%u dots\n",
+		       (unsigned)mi.left_margin_dots, (unsigned)mi.right_margin_dots);
+		printf("print/feed dpi: %.1f/%.1f\n", mi.print_dpi, mi.feed_dpi);
+	} else {
+		printf("media info: unavailable (%s)\n", libptouch_strerror(ctx));
+	}
+
+	uint8_t st[LIBPTOUCH_STATUS_LENGTH];
+	if (libptouch_get_status(ctx, st) == LIBPTOUCH_OK) {
+		libptouch_status_fprint(stdout, st);
+	} else {
+		printf("status: unavailable (%s)\n", libptouch_strerror(ctx));
+	}
+}
+
+static void verbose_print_post_print_status(libptouch_ctx *ctx, const char *label)
+{
+	if (!ctx)
+		return;
+	printf("=== verbose: post-print status (%s) ===\n", label);
+	uint8_t st[LIBPTOUCH_STATUS_LENGTH];
+	if (libptouch_get_status(ctx, st) == LIBPTOUCH_OK) {
+		libptouch_status_fprint(stdout, st);
+	} else {
+		printf("status: unavailable (%s)\n", libptouch_strerror(ctx));
+	}
+}
+
 int main(int argc, char **argv)
 {
 	const char *file = NULL;
@@ -108,6 +156,7 @@ int main(int argc, char **argv)
 	unsigned threshold = LIBPTOUCH_PNG_DEFAULT_THRESHOLD;
 	unsigned usb_pid_arg = 0;
 	int dry_run = 0;
+	int verbose = 0;
 	int trim_right_enabled = 0;
 	int trim_right_auto = 0;
 	unsigned trim_right_dots = 0;
@@ -120,6 +169,7 @@ int main(int argc, char **argv)
 		{ "threshold", required_argument, NULL, 't' },
 		{ "trim-right", optional_argument, NULL, 'r' },
 		{ "dry-run", no_argument, NULL, 'n' },
+		{ "verbose", no_argument, NULL, 'v' },
 		{ "pid", required_argument, NULL, 'p' },
 		{ "status", no_argument, NULL, 'S' },
 		{ "version", no_argument, NULL, 'V' },
@@ -128,7 +178,7 @@ int main(int argc, char **argv)
 	};
 
 	int c;
-	while ((c = getopt_long(argc, argv, "w:H:f:t:r::p:nhSV", longopts, NULL)) !=
+	while ((c = getopt_long(argc, argv, "w:H:f:t:r::p:nvhSV", longopts, NULL)) !=
 	       -1) {
 		switch (c) {
 		case 'w':
@@ -151,6 +201,9 @@ int main(int argc, char **argv)
 		case 'n':
 			dry_run = 1;
 			break;
+		case 'v':
+			verbose = 1;
+			break;
 		case 'r':
 			trim_right_enabled = 1;
 			if (!optarg) {
@@ -397,8 +450,13 @@ int main(int argc, char **argv)
 		}
 	}
 
+	if (verbose)
+		verbose_print_pre_print_info(ctx, &params, data_len);
+
 	e = libptouch_print_raster(ctx, data, data_len, &params);
 	if (e != LIBPTOUCH_OK) {
+		if (verbose)
+			verbose_print_post_print_status(ctx, "print failed");
 		fprintf(stderr, "print_raster: %s\n",
 			libptouch_strerror(ctx));
 		libptouch_close(ctx);
@@ -410,6 +468,9 @@ int main(int argc, char **argv)
 		return 1;
 	}
 
+	if (verbose)
+		verbose_print_post_print_status(ctx, "print success");
+
 	libptouch_close(ctx);
 	libptouch_destroy(ctx);
 	if (data_from_lib)