From 746bcd25e22e492cd45a92bc9addb04cf81d208b Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Thu, 26 Mar 2020 11:28:58 +0200
Subject: Initial commit

---
 scripts/rcc | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100755 scripts/rcc

(limited to 'scripts/rcc')

diff --git a/scripts/rcc b/scripts/rcc
new file mode 100755
index 0000000..2ca587c
--- /dev/null
+++ b/scripts/rcc
@@ -0,0 +1,101 @@
+#!/usr/bin/env python3
+
+import argparse
+import sys
+import os.path
+import subprocess
+import xml.etree.ElementTree as xml
+
+def train(files, output, zstd='zstd', maxdict=512):
+    cmd = [ zstd, '--train', '--stdout', '--maxdict=' + str(maxdict), '-o', output ]
+
+    for f in files:
+        cmd.append(f.name)
+
+    subprocess.run(cmd)
+
+def compress(file, zstd='zstd', level=19, dictionary=None):
+    cmd = [ zstd, '--compress', '--stdout', '-' + str(level) ]
+
+    if dictionary is not None:
+        cmd.append('-D')
+        cmd.append(dictionary.name)
+    
+    cmd.append(file.name)
+    return subprocess.run(cmd, capture_output=True).stdout
+
+def hexdump(array_name, input_file, out_h):
+    array_len = 0
+    
+    print("constexpr unsigned char {}[] = {{".format(array_name), file=out_h)
+
+    for byte in input_file[0:len(input_file)]:
+        array_len+=1
+        if array_len%16 == 0:
+            print(" 0x{:02X},".format(byte), file=out_h)
+        else:
+            print(" 0x{:02X},".format(byte), file=out_h, end='')
+
+
+    print("};", file=out_h)
+    print("constexpr size_t {}_len = {};\n".format(array_name, array_len), file=out_h)
+
+def name(path):
+    name = path.replace('/', '_')
+    if name.endswith('.zstd'):
+        name = name[:-5]
+    name = name.replace('-', '_')
+    name = name.replace('.', '_')
+    return name
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description='Resource Compiler for C++',
+        epilog='If using compression, make sure the required dependencies are provided.',
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter
+    )
+
+    parser.add_argument('input', type=argparse.FileType('rt'), help='input file (.xrc)')
+    parser.add_argument('-o', '--output', type=argparse.FileType('wt'), metavar='OUT', default=sys.stdout, help='output header file')
+
+    parser.add_argument('--compress', choices=[ 'None', 'Zstd' ], help='compress input files using algorightm')
+    parser.add_argument('--dict', type=argparse.FileType('rb'), help='[zstd] use specified dictionary, recommended for many similar small files')
+    parser.add_argument('--train', action='store_true', help='[zstd] train dictionary')
+
+    args=parser.parse_args()
+
+    entries_list = ""
+
+    if args.compress=='Zstd' and args.train:
+        train(args.input, args.dict.name)
+
+    # write header
+    print("// Autogenerated binary file hexdump", file=args.output)
+    print("// This file may get overwritten by the build system\n", file=args.output)
+    print("#include <embed.h>\n", file=args.output)
+
+    # write file data
+    for child in xml.parse(args.input).getroot():
+        if child.tag == 'qresource':
+            prefix = child.attrib['prefix']
+            for i in child:
+                vname = name(i.text)
+                with open(i.text) as f:
+                    hexdump(vname, compress(f, dictionary=args.dict), args.output)
+                entries_list += "  {{ \"{}/{}\", std::span({}, {}_len) }},\n".format(prefix, i.attrib['alias'], vname, vname)
+
+    # write dictionary
+    if args.dict is not None:
+        hexdump('dictionary', args.dict.read(), args.output)
+    
+    # write entries
+    print("constexpr auto entries = frozen::make_unordered_map<frozen::string, std::span<const unsigned char>>({", file=args.output)
+    print(entries_list, file=args.output)
+    print("});\n", file=args.output)
+    
+    # write metadata struct
+    print("constexpr embed::ResourceData metadata = {", file=args.output)
+    print("    .compression = embed::{},".format(args.compress), file=args.output)
+    if args.dict is not None:
+        print("    .dictionary = std::span(dictionary, dictionary_len),", file=args.output)
+    print("};", file=args.output)
-- 
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