feat: font generation from ttf (#882)

* chore: add file variant of json fonts

* chore: add stb dependency

* feat: generate fonts from ttf files

* chore: add option to add yOffset to file font

* chore: dynamically adjust generated font bitmap size

* fix: printable characters should respect ISO-8859-1 control characters

* chore: do not write missing glyphs into the bitmap

* chore: remove test texture conversion

* chore: adjust font compiler for iw3,iw4,iw5,t4,t5

* chore: add possibility to fill color channels when converting

* fix: games other than t6 use rgba for fonts

* fix: make sure no mipmaps are set on loaddef

* fix: t4 and iw3 use dimensions in image loaddef

* chore: also include optional glyphs in fonts

thirdparty/stb.lua

@@ -0,0 +1,42 @@
+stb = {}
+
+function stb:include(includes)
+	if includes:handle(self:name()) then
+		includedirs {
+			path.join(ThirdPartyFolder(), "stb")
+		}
+	end
+end
+
+function stb:link(links)
+	links:add(self:name())
+end
+
+function stb:use()
+	
+end
+
+function stb:name()
+    return "stb"
+end
+
+function stb:project()
+	local folder = ThirdPartyFolder()
+	local includes = Includes:create()
+
+	project(self:name())
+        targetdir(TargetDirectoryLib)
+		location "%{wks.location}/thirdparty/%{prj.name}"
+		kind "StaticLib"
+		language "C++"
+		
+		files { 
+			path.join(folder, "stb/*.h"),
+			path.join(folder, "stb_impl/*.cpp")
+		}
+		
+		self:include(includes)
+
+		-- Disable warnings. They do not have any value to us since it is not our code.
+		warnings "off"
+end

thirdparty/stb_impl/stb_truetype.cpp

@@ -0,0 +1,2 @@
+#define STB_TRUETYPE_IMPLEMENTATION
+#include "stb_truetype.h"