kmstest: Use pixpat vbar for the moving flip bar

Replace the hand-rolled draw_color_bar call in FlipState::draw_bar with
pixpat's "vbar" pattern via a new draw_vbar_pattern helper in kms++util.
The pattern fills the full buffer, so the old_xpos bookkeeping for
clearing the previous bar is no longer needed.

1 files changed, 2 insertions, 3 deletions

diff --git a/utils/kmstest.cpp b/utils/kmstest.cpp
index cc21b92..a5adbe2 100644
--- a/utils/kmstest.cpp
+++ b/utils/kmstest.cpp
@@ -1034,10 +1034,9 @@ private:
 
 	static void draw_bar(Framebuffer* fb, unsigned frame_num)
 	{
-		int old_xpos = frame_num < s_num_buffers ? -1 : get_bar_pos(fb, frame_num - s_num_buffers);
-		int new_xpos = get_bar_pos(fb, frame_num);
+		unsigned xpos = get_bar_pos(fb, frame_num);
 
-		draw_color_bar(*fb, old_xpos, new_xpos, bar_width);
+		draw_vbar_pattern(*fb, xpos, bar_width);
 		draw_text(*fb, fb->width() / 2, 0, to_string(frame_num), RGB(255, 255, 255));
 	}