From b7d12de0a7024454ff65f6e5f5f94cc41dcde205 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 25 Feb 2020 14:49:17 +0530
Subject: [PATCH] Avoid transitions in line_as_ansi on marks

---
 kitty/data-types.h | 1 +
 kitty/line.c       | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/kitty/data-types.h b/kitty/data-types.h
index edba314fa..de2663ff0 100644
--- a/kitty/data-types.h
+++ b/kitty/data-types.h
@@ -71,6 +71,7 @@ typedef enum { TILING, SCALED, MIRRORED } BackgroundImageLayout;
 #define DIM_SHIFT 8
 #define MARK_SHIFT 9
 #define ATTRS_MASK_WITHOUT_MARK 0xf9ff
+#define ATTRS_MASK_FOR_SGR (ATTRS_MASK_WITHOUT_MARK | ATTRS_MASK_WITHOUT_WIDTH)
 #define MARK_MASK 3
 #define COL_MASK 0xFFFFFFFF
 #define UTF8_ACCEPT 0
diff --git a/kitty/line.c b/kitty/line.c
index e1d6db78a..c25391de6 100644
--- a/kitty/line.c
+++ b/kitty/line.c
@@ -298,7 +298,7 @@ line_as_ansi(Line *self, Py_UCS4 *buf, index_type buflen, bool *truncated, const
 
         cell = &self->gpu_cells[pos];
 
-#define CMP_ATTRS (cell->attrs & ATTRS_MASK_WITHOUT_WIDTH) != ((*prev_cell)->attrs & ATTRS_MASK_WITHOUT_WIDTH)
+#define CMP_ATTRS (cell->attrs & ATTRS_MASK_FOR_SGR) != ((*prev_cell)->attrs & ATTRS_MASK_FOR_SGR)
 #define CMP(x) cell->x != (*prev_cell)->x
         if (CMP_ATTRS || CMP(fg) || CMP(bg) || CMP(decoration_fg)) {
             const char *sgr = cell_as_sgr(cell, *prev_cell);