Add initial prototype.

3-mid/opengl/library/opengl_demo.gpr

@@ -0,0 +1,24 @@
+with
+     "opengl",
+     "sdlada",
+     "lace_shared";
+
+--library
+project openGL_Demo
+is
+   for Create_Missing_Dirs use "True";
+
+   for Source_Dirs  use ("../source/demo");
+   for Object_Dir   use "build";
+   for Library_Dir  use "lib";
+--   for Library_Name use "openGL_Demo";
+
+   package Builder renames Lace_shared.Builder;
+
+   package Compiler
+   is
+      for Default_Switches ("ada")               use Lace_shared.Compiler_Options;
+      for         Switches ("opengl-images.adb") use ("-O0");
+   end Compiler;
+
+end openGL_Demo;