feat(shaders): Implement dynamic background shader

tests/test_dynamic_background.py

@@ -0,0 +1,33 @@
+import pytest
+from unittest.mock import patch, MagicMock
+
+def test_dynamic_background_rendering():
+ # Mock OpenGL before importing
+ with patch("src.shader_manager.gl") as mock_gl:
+  from src.shader_manager import ShaderManager
+  
+  # Setup mock return values
+  mock_gl.glCreateProgram.return_value = 1
+  mock_gl.glCreateShader.return_value = 2
+  mock_gl.glGetShaderiv.return_value = 1 # GL_TRUE
+  mock_gl.glGetProgramiv.return_value = 1 # GL_TRUE
+  mock_gl.glGetUniformLocation.return_value = 10
+  
+  manager = ShaderManager()
+  manager.setup_background_shader()
+  
+  # Verify background program was created
+  assert manager.bg_program == 1
+  assert mock_gl.glCreateProgram.called
+  
+  # Render background
+  manager.render_background(800, 600, 1.0)
+  
+  # Verify OpenGL calls
+  mock_gl.glUseProgram.assert_any_call(1)
+  mock_gl.glDrawArrays.assert_called_with(mock_gl.GL_TRIANGLE_STRIP, 0, 4)
+  mock_gl.glUseProgram.assert_any_call(0)
+  
+  # Verify uniforms were updated
+  mock_gl.glUniform1f.assert_called()
+  mock_gl.glUniform2f.assert_called()