From ac4f63b76e514119f7d595fef28c2e981c6f9b05 Mon Sep 17 00:00:00 2001
From: Ed_ <edwardgz@gmail.com>
Date: Fri, 13 Mar 2026 12:27:01 -0400
Subject: [PATCH] feat(shaders): Create ShaderManager with basic compilation

---
 src/shader_manager.py        | 40 ++++++++++++++++++++++++++++++++++++
 tests/test_shader_manager.py | 25 ++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 src/shader_manager.py
 create mode 100644 tests/test_shader_manager.py

diff --git a/src/shader_manager.py b/src/shader_manager.py
new file mode 100644
index 0000000..19ecf57
--- /dev/null
+++ b/src/shader_manager.py
@@ -0,0 +1,40 @@
+# src/shader_manager.py
+import OpenGL.GL as gl
+
+class ShaderManager:
+ def __init__(self):
+  pass
+
+ def compile_shader(self, vertex_src: str, fragment_src: str) -> int:
+  program = gl.glCreateProgram()
+  
+  def _compile(src, shader_type):
+   shader = gl.glCreateShader(shader_type)
+   gl.glShaderSource(shader, src)
+   gl.glCompileShader(shader)
+   
+   if not gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS):
+    info_log = gl.glGetShaderInfoLog(shader)
+    if hasattr(info_log, "decode"):
+     info_log = info_log.decode()
+    raise RuntimeError(f"Shader compilation failed: {info_log}")
+   return shader
+
+  vert_shader = _compile(vertex_src, gl.GL_VERTEX_SHADER)
+  frag_shader = _compile(fragment_src, gl.GL_FRAGMENT_SHADER)
+  
+  gl.glAttachShader(program, vert_shader)
+  gl.glAttachShader(program, frag_shader)
+  gl.glLinkProgram(program)
+  
+  if not gl.glGetProgramiv(program, gl.GL_LINK_STATUS):
+   info_log = gl.glGetProgramInfoLog(program)
+   if hasattr(info_log, "decode"):
+    info_log = info_log.decode()
+   raise RuntimeError(f"Program linking failed: {info_log}")
+  
+  # Optional: delete shaders as they are linked into the program
+  gl.glDeleteShader(vert_shader)
+  gl.glDeleteShader(frag_shader)
+  
+  return program
diff --git a/tests/test_shader_manager.py b/tests/test_shader_manager.py
new file mode 100644
index 0000000..f4e9cc6
--- /dev/null
+++ b/tests/test_shader_manager.py
@@ -0,0 +1,25 @@
+import pytest
+from unittest.mock import patch, MagicMock
+
+def test_shader_manager_initialization_and_compilation():
+ # Import inside test to allow patching OpenGL before import if needed
+ # In this case, we patch the OpenGL.GL functions used by ShaderManager
+ with patch("src.shader_manager.gl") as mock_gl:
+  mock_gl.glCreateProgram.return_value = 1
+  mock_gl.glCreateShader.return_value = 2
+  mock_gl.glGetShaderiv.return_value = mock_gl.GL_TRUE
+  mock_gl.glGetProgramiv.return_value = mock_gl.GL_TRUE
+  
+  from src.shader_manager import ShaderManager
+  
+  manager = ShaderManager()
+  
+  # Basic vertex and fragment shader source
+  vert_src = "void main() {}"
+  frag_src = "void main() {}"
+  
+  program_id = manager.compile_shader(vert_src, frag_src)
+  
+  assert program_id == 1
+  assert mock_gl.glCreateProgram.called
+  assert mock_gl.glCreateShader.called