fb console: add Source Code Pro font

This font is licensed under the OFL-1.1 License and copyright:

Copyright 2010-2019 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.
All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.

Signed-off-by: Sven Peter <sven@svenpeter.dev>

3rdparty_licenses/LICENSE.OFL-1.1

@@ -0,0 +1,93 @@
+Copyright 2010-2019 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+
+This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

Makefile

@@ -41,7 +41,7 @@ OBJECTS := \
 	chickens.o \
 	dart.o \
 	exception.o exception_asm.o \
-	fb.o \
+	fb.o font.o font_retina.o \
 	heapblock.o \
 	kboot.o \
 	main.o \
@@ -122,6 +122,10 @@ build/%.o: build/%.bin
 	@echo "  BIN   $@"
 	@$(OBJCOPY) -I binary -B aarch64 -O elf64-littleaarch64 $< $@
 
+build/%.bin: font/%.bin
+	@echo "  CP    $@"
+	@cp $< $@
+
 build/main.o: build/build_tag.h src/main.c
 
 -include $(DEPDIR)/*

README.md

@@ -102,3 +102,8 @@ the public domain ([CC0](3rdparty_licenses/LICENSE.CC0)).
 m1n1 embeds portions of [PDCLib](https://github.com/DevSolar/pdclib), which is in the public
 domain ([CC0](3rdparty_licenses/LICENSE.CC0)).
 
+m1n1 embeds the [Source Code Pro](https://github.com/adobe-fonts/source-code-pro) font, which is
+licensed under the [OFL-1.1](3rdparty_licenses/LICENSE.OFL-1.1) license and copyright:
+
+* Copyright 2010-2019 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
+* This Font Software is licensed under the SIL Open Font License, Version 1.1.

font/README.md

@@ -0,0 +1,3 @@
+These fonts have been generated with
+	makefont.sh 8 16 12 SourceCodePro-Bold.ttf font.bin 
+	makefont.sh 16 32 25 SourceCodePro-Bold.ttf font_retina.bin

font/makefont.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+width=$1
+height=$2
+size=$3
+fontfile=$4
+outfile=$5
+shift 5
+
+(
+for ord in $(seq 32 126); do
+    printf "\\x$(printf %x $ord)\\n"
+done
+) | convert \
+    -page ${width}x$((height*95)) \
+    -background black \
+    -fill white \
+    -antialias \
+    -font $fontfile \
+    -density 72 \
+    -gravity north \
+    -pointsize $size \
+    $* \
+    -define quantum:format=unsigned \
+    -depth 8 \
+    label:\@- \
+    -crop ${width}x$((height*95)) \
+    gray:$outfile

src/fb.c

@@ -14,6 +14,9 @@ static int logo_w, logo_h;
 extern char _binary_build_bootlogo_128_bin_start[0];
 extern char _binary_build_bootlogo_256_bin_start[0];
 
+extern u8 _binary_build_font_bin_start[];
+extern u8 _binary_build_font_retina_bin_start[];
+
 void fb_init(void)
 {
     fb = (void *)cur_boot_args.video.base;