feat(gx): add incomplete 'CGxDeviceGLSDL' (#2)

* chore(build): add vendored SDL 3.0.0 library

* chore(build): add vendored glew-cmake-2.2.0 library

* feat(console): in the presence of -opengl launch flag, change GxApi to OpenGl

* feat(gx): add uncompleted CGxDeviceGLSDL targeting Windows and Linux

* chore(build): change SDL3 linkage from shared (bad) to to static (good)

vendor/sdl-3.0.0/build-scripts/rename_headers.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+#
+# This script renames SDL headers in the specified paths
+
+import argparse
+import pathlib
+import re
+
+
+def main():
+    replacements = [
+        ( re.compile(r"(?:[\"<])(?:SDL2/)?SDL_gamecontroller.h(?:[\">])"), r"<SDL3/SDL_gamepad.h>" ),
+        ( re.compile(r"(?:[\"<])(?:SDL2/)?begin_code.h(?:[\">])"), r"<SDL3/SDL_begin_code.h>" ),
+        ( re.compile(r"(?:[\"<])(?:SDL2/)?close_code.h(?:[\">])"), r"<SDL3/SDL_close_code.h>" ),
+        ( re.compile(r"(?:[\"<])(?:SDL2/)?(SDL[_a-z0-9]*\.h)(?:[\">])"), r"<SDL3/\1>" )
+    ]
+    for entry in args.args:
+        path = pathlib.Path(entry)
+        if not path.exists():
+            print("%s doesn't exist, skipping" % entry)
+            continue
+
+        replace_headers_in_path(path, replacements)
+
+
+def replace_headers_in_file(file, replacements):
+    try:
+        with file.open("r", encoding="UTF-8", newline="") as rfp:
+            original = rfp.read()
+            contents = original
+            for regex, replacement in replacements:
+                contents = regex.sub(replacement, contents)
+            if contents != original:
+                with file.open("w", encoding="UTF-8", newline="") as wfp:
+                    wfp.write(contents)
+    except UnicodeDecodeError:
+        print("%s is not text, skipping" % file)
+    except Exception as err:
+        print("%s" % err)
+
+
+def replace_headers_in_dir(path, replacements):
+    for entry in path.glob("*"):
+        if entry.is_dir():
+            replace_headers_in_dir(entry, replacements)
+        else:
+            print("Processing %s" % entry)
+            replace_headers_in_file(entry, replacements)
+
+
+def replace_headers_in_path(path, replacements):
+        if path.is_dir():
+            replace_headers_in_dir(path, replacements)
+        else:
+            replace_headers_in_file(path, replacements)
+
+
+if __name__ == "__main__":
+
+    parser = argparse.ArgumentParser(fromfile_prefix_chars='@')
+    parser.add_argument("args", nargs="*")
+    args = parser.parse_args()
+
+    try:
+        main()
+    except Exception as e:
+        print(e)
+        exit(-1)
+
+    exit(0)
+