From b2764a3a349b48d7445202faa903383386c09a4c Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 18 Nov 2016 23:16:54 +0200
Subject: [PATCH] Generate the entire shaderlib into a single file

Generating lots of small files seemed rather silly, and I found no good
way to automatically generate the builtin init code.
---
 Build                |  1 +
 scripts/resgen.py    | 57 ++++++++++++++++++++++++++++----------------
 source/resources.cpp |  4 ++--
 3 files changed, 40 insertions(+), 22 deletions(-)

diff --git a/Build b/Build
index fcdb6328..610fd18c 100644
--- a/Build
+++ b/Build
@@ -34,6 +34,7 @@ package "mspgl"
 		in_suffix ".glsl";
 		out_suffix ".cpp";
 		command "scripts/resgen.py";
+		processing_unit DIRECTORY;
 	};
 
 	library "mspgl"
diff --git a/scripts/resgen.py b/scripts/resgen.py
index 16cfbfb9..110055cf 100755
--- a/scripts/resgen.py
+++ b/scripts/resgen.py
@@ -12,30 +12,47 @@ def makename(text):
 			result += '_'
 	return result
 
-def escape(text):
-	result = ""
-	for c in text:
-		if c=='\t':
-			result += "\\t"
-		elif c=='\n':
-			result += "\\n"
-		elif c=='"':
-			result += "\\\""
-		else:
-			result += c
-	return result
+def escape_char(c):
+	if c=='\t':
+		return "\\t"
+	elif c=='\n':
+		return "\\n"
+	elif c=='"':
+		return "\\\""
+	else:
+		return c
 
-name = makename(os.path.split(sys.argv[1])[1])
-lines = open(sys.argv[1]).readlines()
-out = open(sys.argv[2], "w")
-out.write("""namespace Msp {
+out = open(sys.argv[-1], "w")
+
+out.write("""#include <msp/datafile/builtinsource.h>
+
+namespace Msp {
 namespace GL {
+
 """)
-out.write("extern const char {}_data[] =\n".format(name))
-for l in lines:
-	out.write("\t\"{}\"\n".format(escape(l)))
-out.write(""";
 
+objects = {}
+for fn in sys.argv[1:-1]:
+	in_base = os.path.split(fn)[1]
+	name = makename(in_base)+"_data"
+	objects[in_base] = name
+	out.write("const char {}[] =\n".format(name))
+	data = open(fn).read()
+	line = ""
+	for c in data:
+		line += escape_char(c)
+		if len(line)>=68:
+			out.write("\t\"{}\"\n".format(line))
+			line = ""
+	out.write("\t\"{}\";\n\n".format(line))
+
+out_base = os.path.splitext(os.path.split(sys.argv[-1])[1])[0]
+out.write("void init_{}(DataFile::BuiltinSource &source)\n{{\n".format(makename(out_base)))
+for n, d in objects.items():
+	out.write("\tsource.add_object(\"{}\", {});\n".format(n, d))
+out.write("}\n")
+
+out.write("""
 } // namespace GL
 } // namespace Msp
 """)
diff --git a/source/resources.cpp b/source/resources.cpp
index 48e986ce..8f3b4b8b 100644
--- a/source/resources.cpp
+++ b/source/resources.cpp
@@ -23,7 +23,7 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
-extern const char singlepass_glsl_data[];
+void init_shaderlib(DataFile::BuiltinSource &);
 
 Resources::Resources():
 	default_tex_filter(SGIS_generate_mipmap ? LINEAR_MIPMAP_LINEAR : LINEAR),
@@ -56,7 +56,7 @@ DataFile::BuiltinSource &Resources::get_builtins()
 
 	if(!init_done)
 	{
-		builtins.add_object("singlepass.glsl", singlepass_glsl_data);
+		init_shaderlib(builtins);
 		init_done = true;
 	}
 
-- 
2.45.2