1 files changed, 72 insertions, 0 deletions
diff --git a/codegen/mod.rs b/codegen/mod.rs
new file mode 100644
index 0000000..42dc9dc
--- /dev/null
+++ b/codegen/mod.rs
@@ -0,0 +1,72 @@
+use std::error::Error;
+use std::fs::File;
+use std::io::Write;
+use std::path::Path;
+
+use opengl_registry::api_interface_definition::FeatureKind;
+use opengl_registry::Registry;
+use quote::quote;
+
+use crate::codegen::command::functions::create_command_functions;
+use crate::codegen::command::globals::create_command_globals;
+use crate::codegen::load_with::create_load_with_function;
+
+pub mod bindings;
+
+mod command;
+mod formatting;
+mod load_with;
+
+pub fn generate_using_registry(dest_file: &Path) -> Result<(), Box<dyn Error>>
+{
+    let registry = Registry::retrieve()?;
+
+    let removed_commands = registry
+        .api_interface_definitions()
+        .iter()
+        .flat_map(|api_interface_def| {
+            api_interface_def.removals().iter().flat_map(|removal| {
+                removal.features().iter().filter_map(|feature| {
+                    if feature.kind() != FeatureKind::Command {
+                        return None;
+                    }
+
+                    Some(feature.name())
+                })
+            })
+        })
+        .collect::<Vec<_>>();
+
+    let filtered_commands = registry
+        .commands()
+        .iter()
+        .filter(|command| !removed_commands.contains(&command.prototype().name()))
+        .cloned()
+        .collect::<Vec<_>>();
+
+    let command_globals = create_command_globals(&filtered_commands);
+    let command_functions = create_command_functions(&filtered_commands)?;
+    let load_with_function = create_load_with_function(&filtered_commands);
+
+    let tokens = quote! {
+        #(#command_functions)*
+
+        #load_with_function
+
+        mod functions
+        {
+            #(#command_globals)*
+
+            extern "C" fn function_not_loaded()
+            {
+                panic!("OpenGL function not loaded");
+            }
+        }
+    };
+
+    let mut file = File::create(dest_file)?;
+
+    file.write_all(tokens.to_string().as_bytes())?;
+
+    Ok(())
+}