add default font / eliminate font-assets dependency

Our default font is a ~200K download which is not substantial enough to
warrant the need for a seperate dependency/repository.

Signed-off-by: Emi <emi@hexops.com>

build.zig

@@ -136,8 +136,7 @@ pub fn build(b: *std.Build) !void {
                 module.addImport("mach-opus", dep.module("mach-opus"));
             }
         }
-        if (b.lazyDependency("font_assets", .{})) |dep| module.addImport("font-assets", dep.module("font-assets"));
-
+        
         if (want_examples) {
             for (examples) |example| b.getInstallStep().dependOn(example.install_step);
         }

build.zig.zon

@@ -16,11 +16,6 @@
             .hash = "1220adfccce3dbc4e4fa8650fdaec110a676f6b8a1462ed6ef422815207f8288e9d2",
             .lazy = true,
         },
-        .font_assets = .{
-            .url = "https://github.com/hexops/font-assets/archive/b2336a29b1ae633d47452a2041b258e9538ef5f0.tar.gz",
-            .hash = "1220521ff5b01885da9b3cba75b607b315f60ae351594ee9e4a270b164374889fea0",
-            .lazy = true,
-        },
         .mach_objc = .{
             .url = "https://pkg.machengine.org/mach-objc/79b6f80c32b14948554958afe72dace261b14afc.tar.gz",
             .hash = "12203675829014e69be2ea7c126ecf25d403009d336b7ca5f6e7c4ccede826c8e597",

src/gfx/Text.zig

@@ -500,7 +500,7 @@ fn updatePipelineBuffers(
             // TODO(text): keep fonts around for reuse later
             // const font_name = text_style.get(style, .font_name).?;
             // _ = font_name; // TODO(text): actually use font name
-            const font_bytes = @import("font-assets").fira_sans_regular_ttf;
+            const font_bytes = gfx.default_font;
             var font = if (text.font_once) |f| f else blk: {
                 text.font_once = try gfx.Font.initBytes(font_bytes);
                 break :blk text.font_once.?;

src/gfx/font/firasans/LICENSE

@@ -0,0 +1,93 @@
+Copyright (c) 2012-2015, The Mozilla Foundation and Telefonica S.A.
+
+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.

src/gfx/font/main.zig

@@ -79,12 +79,15 @@ pub const RenderedGlyph = struct {
     height: u32,
 };
 
+/// The default font used by Mach. currently Fira Sans Regular, but may change in the future.
+pub const default_font = @embedFile("firasans/FiraSans-Regular.ttf");
+
 test {
     std.testing.refAllDeclsRecursive(@This());
 
     // Load a font
     const allocator = std.testing.allocator;
-    const font_bytes = @import("font-assets").fira_sans_regular_ttf;
+    const font_bytes = default_font;
     var font = try Font.initBytes(font_bytes);
     defer font.deinit(allocator);
 

src/gfx/main.zig

@@ -10,6 +10,7 @@ pub const modules = .{ Sprite, Text };
 
 // Fonts
 pub const Font = @import("font/main.zig").Font;
+pub const default_font = @import("font/main.zig").default_font;
 pub const TextRun = @import("font/main.zig").TextRun;
 pub const Glyph = @import("font/main.zig").Glyph;
 pub const px_per_pt = @import("font/main.zig").px_per_pt;