From 70784e1bcc723627897eacb6b54da3a01f228638 Mon Sep 17 00:00:00 2001
From: Andri Yngvason <andri@yngvason.is>
Date: Sun, 6 Feb 2022 17:44:12 +0000
Subject: [PATCH] cursor: Fix alpha mask stride

---
 src/cursor.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/cursor.c b/src/cursor.c
index a2c063b..3e22759 100644
--- a/src/cursor.c
+++ b/src/cursor.c
@@ -69,15 +69,14 @@ int cursor_encode(struct vec* dst, struct rfb_pixel_format* pixfmt,
 	dstdata = dst->data;
 	dstdata += dst->len;
 
-	if(image->width == image->stride) {
-		if (!extract_alpha_mask(dstdata, image->addr,
-					image->fourcc_format, size))
+	for (int y = 0; y < image->height; ++y) {
+		if (!extract_alpha_mask(dstdata + y * UDIV_UP(image->width, 8),
+					(uint32_t*)image->addr + y * image->stride,
+					image->fourcc_format, image->width))
 			return -1;
-	} else {
-		// TODO
-		abort();
+
+		dst->len += UDIV_UP(image->width, 8);
 	}
 
-	dst->len += UDIV_UP(size, 8);
 	return 0;
 }