From a9d96371dcbbf8872900230b9e43958508d4067e Mon Sep 17 00:00:00 2001
From: Alexander Babikov <2708460+lemondrops@users.noreply.github.com>
Date: Mon, 25 Dec 2023 07:06:39 +0500
Subject: [PATCH] ESC/P: Add workaround for glyphs with negative offsets

Fixes characters disappearing when printed very close to the paper edges
---
 src/printer/prt_escp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/printer/prt_escp.c b/src/printer/prt_escp.c
index cd0279078..6ae706cc8 100644
--- a/src/printer/prt_escp.c
+++ b/src/printer/prt_escp.c
@@ -1578,8 +1578,8 @@ handle_char(escp_t *dev, uint8_t ch)
         FT_Render_Glyph(dev->fontface->glyph, FT_RENDER_MODE_NORMAL);
     }
 
-    pen_x = PIXX + dev->fontface->glyph->bitmap_left;
-    pen_y = (uint16_t) (PIXY - dev->fontface->glyph->bitmap_top + dev->fontface->size->metrics.ascender / 64);
+    pen_x = PIXX + fmax(0.0, dev->fontface->glyph->bitmap_left);
+    pen_y = (uint16_t) (PIXY + fmax(0.0, -dev->fontface->glyph->bitmap_top + dev->fontface->size->metrics.ascender / 64));
 
     if (dev->font_style & STYLE_SUBSCRIPT)
         pen_y += dev->fontface->glyph->bitmap.rows / 2;