File 0010-Add-warnings-when-wrapping-multiple-fonts-and-on-PCF.patch of Package fonttosfnt.20912

From f860f76b4f3d5b7c604eafaea3460ca3ed2f23d1 Mon Sep 17 00:00:00 2001
From: Christopher Zimmermann <madroach@gmerlin.de>
Date: Sat, 18 Jul 2020 08:39:01 +0200
Subject: [PATCH 10/14] Add warnings when wrapping multiple fonts and on PCF
 fonts

---
 fonttosfnt.c |  6 ++++++
 read.c       | 12 +++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/fonttosfnt.c b/fonttosfnt.c
index 062ef3e..3d865d1 100644
--- a/fonttosfnt.c
+++ b/fonttosfnt.c
@@ -106,6 +106,12 @@ main(int argc, char **argv)
 
     font = makeFont();
 
+    if(argc - i > 1)
+	fprintf(stderr,
+	    "You are requesting to put more than one font into a single OpenType font.\n"
+	    "This is not recommended. The global font metrics will not match every font face.\n"
+	    "Rather create an OpenType font collection\n");
+
     if(i == argc) {
         rc = readFile(NULL, font);
         if(rc != 0)
diff --git a/read.c b/read.c
index db79a59..67716a0 100644
--- a/read.c
+++ b/read.c
@@ -29,6 +29,7 @@ THE SOFTWARE.
 #include FT_FREETYPE_H
 #include FT_MODULE_H
 #include FT_BDF_H
+#include FT_FONT_FORMATS_H
 #include "X11/Xos.h"
 #include "fonttosfnt.h"
 #include "X11/fonts/fontenc.h"
@@ -102,7 +103,7 @@ readFile(char *filename, FontPtr font)
     BitmapPtr bitmap;
     int symbol = 0;
     int force_unicode = 1;
-    char *encoding_name = NULL;
+    const char *encoding_name, *file_format;
     FontMapPtr mapping = NULL;
     FontMapReversePtr reverse = NULL;
     
@@ -133,6 +134,15 @@ readFile(char *filename, FontPtr font)
         return -1;
     }
 
+    file_format = FT_Get_Font_Format(face);
+    if(strcmp(file_format, "BDF") != 0)
+    fprintf(stderr,
+	"font file %s is of %s format.\n"
+	"It's recommended to convert directly from a BDF font.\n"
+	"Some font properties may get lost when converting via a PCF font.\n",
+	filename ? filename : "<stdin>",
+	file_format);
+
     /* FreeType will insist on encodings which are simple subsets of unicode
      * to be read as unicode regardless of what we call them. */
     for(j = 0; j < face->num_charmaps; ++j) {
-- 
2.28.0