File 0002-use-zero-lineGap-sTypoDescender-should-be-... of Package fonttosfnt

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File 0002-use-zero-lineGap-sTypoDescender-should-be-negative.patch of Package fonttosfnt

From 669186712d755720ece47e6f698a6d83bdf27728 Mon Sep 17 00:00:00 2001
From: Christopher Zimmermann <madroach@gmerlin.de>
Date: Sun, 31 May 2020 08:02:24 +0200
Subject: [PATCH 02/14] use zero lineGap, sTypoDescender should be negative

According to
https://simoncozens.github.io/fonts-and-layout/opentype.html#vertical-metrics-hhea-and-os2
sTypoDescender should be negative and lineGap should be zero.
---
 write.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/write.c b/write.c
index c8a86e4..067732f 100644
--- a/write.c
+++ b/write.c
@@ -851,7 +851,7 @@ writehhea(FILE* out, FontPtr font)
     writeULONG(out, 0x00010000); /* version */
     writeSHORT(out, FONT_UNITS_CEIL(max_y)); /* ascender */
     writeSHORT(out, FONT_UNITS_FLOOR(min_y)); /* descender */
-    writeSHORT(out, FONT_UNITS(TWO_SIXTEENTH / 20)); /* lineGap */
+    writeSHORT(out, 0);		/* lineGap */
     writeUSHORT(out, FONT_UNITS(max_awidth)); /* advanceWidthMax */
     writeSHORT(out, FONT_UNITS_FLOOR(min_x)); /* minLeftSideBearing */
     writeSHORT(out, FONT_UNITS_FLOOR(min_x)); /* minRightSideBearing */
@@ -1017,9 +1017,8 @@ writeOS2(FILE* out, FontPtr font)
     writeUSHORT(out, 0x20);     /* usFirstCharIndex; */
     writeUSHORT(out, 0xFFFD);   /* usLastCharIndex; */
     writeUSHORT(out, FONT_UNITS_CEIL(max_y)); /* sTypoAscender; */
-    writeUSHORT(out, -FONT_UNITS_FLOOR(min_y)); /* sTypoDescender; */
-    writeUSHORT(out, FONT_UNITS(max_y - min_y));
-    /* sTypoLineGap; */
+    writeUSHORT(out, FONT_UNITS_FLOOR(min_y)); /* sTypoDescender; */
+    writeUSHORT(out, 0);	/* sTypoLineGap; */
     writeUSHORT(out, FONT_UNITS_CEIL(max_y)); /* usWinAscent; */
     writeUSHORT(out, -FONT_UNITS_FLOOR(min_y)); /* usWinDescent; */
     writeULONG(out, 3);         /* ulCodePageRange1; */
-- 
2.28.0

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File 0002-use-zero-lineGap-sTypoDescender-should-be-negative.patch of Package fonttosfnt

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