From fcdcc6de60a27d9f12eb20ccda9fef310cc0d8e8 Mon Sep 17 00:00:00 2001
From: Solomon Peachy <pizza@shaftnet.org>
Date: Wed, 17 Aug 2016 20:46:00 -0400
Subject: [PATCH] shinkos2145:  Add support for CUPS marker attributes.

 * Guessimate remaining ribbon into a percentage.
---
 backend_shinkos2145.c | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/backend_shinkos2145.c b/backend_shinkos2145.c
index 5ac1d94..f523bc9 100644
--- a/backend_shinkos2145.c
+++ b/backend_shinkos2145.c
@@ -103,6 +103,9 @@ struct shinkos2145_ctx {
 
 	uint8_t *databuf;
 	int datalen;
+
+	uint16_t last_donor;
+	uint16_t last_remain;
 };
 
 /* Structs for printer */
@@ -1394,6 +1397,9 @@ static void shinkos2145_attach(void *vctx, struct libusb_device_handle *dev,
 	ctx->jobid = (jobid & 0x7f);
 	if (!ctx->jobid)
 		ctx->jobid++;
+
+	/* Initialize donor */
+	ctx->last_donor = ctx->last_remain = 65535;
 }
 
 static void shinkos2145_teardown(void *vctx) {
@@ -1530,6 +1536,13 @@ static int shinkos2145_main_loop(void *vctx, int copies) {
 		return CUPS_BACKEND_HOLD;
 	}
 
+        /* Tell CUPS about the consumables we report */
+        ATTR("marker-colors=#00FFFF#FF00FF#FFFF00\n");
+        ATTR("marker-high-levels=100\n");
+        ATTR("marker-low-levels=10\n");
+        ATTR("marker-names=Ribbon\n");
+        ATTR("marker-types=ribbon\n");
+
 	// XXX check copies against remaining media!
 
 top:
@@ -1552,10 +1565,25 @@ top:
 	}
 
 	if (memcmp(rdbuf, rdbuf2, READBACK_LEN)) {
+		uint16_t donor, remain;
+
 		memcpy(rdbuf2, rdbuf, READBACK_LEN);
 
 		INFO("Printer Status: 0x%02x (%s)\n",
 		     sts->hdr.status, status_str(sts->hdr.status));
+
+		/* Guessimate a percentage for the remaining media */
+		donor = le32_to_cpu(sts->count_ribbon_left) * 100 / (le32_to_cpu(sts->count_ribbon_left)+le32_to_cpu(sts->count_paper));
+		if (donor != ctx->last_donor) {
+			ctx->last_donor = donor;
+			ATTR("marker-levels=%d\n", donor);
+		}
+		remain = le32_to_cpu(sts->count_ribbon_left);
+		if (remain != ctx->last_remain) {
+			ctx->last_remain = remain;
+			ATTR("marker-message=\"%d prints remaining on ribbon\"\n", remain);
+		}
+
 		if (sts->hdr.result != RESULT_SUCCESS)
 			goto printer_error;
 		if (sts->hdr.error == ERROR_PRINTER)
@@ -1702,7 +1730,7 @@ static int shinkos2145_query_serno(struct libusb_device_handle *dev, uint8_t end
 
 struct dyesub_backend shinkos2145_backend = {
 	.name = "Shinko/Sinfonia CHC-S2145",
-	.version = "0.47",
+	.version = "0.48",
 	.uri_prefix = "shinkos2145",
 	.cmdline_usage = shinkos2145_cmdline,
 	.cmdline_arg = shinkos2145_cmdline_arg,