feat(shaders): Implement CRT post-process shader logic

tests/test_post_process.py

@@ -0,0 +1,53 @@
+import unittest
+from unittest.mock import MagicMock, patch
+import sys
+
+# Mock OpenGL.GL before importing ShaderManager
+gl_mock = MagicMock()
+# Setup some constants
+gl_mock.GL_VERTEX_SHADER = 0x8B31
+gl_mock.GL_FRAGMENT_SHADER = 0x8B30
+gl_mock.GL_COMPILE_STATUS = 0x8B81
+gl_mock.GL_LINK_STATUS = 0x8B82
+gl_mock.GL_TEXTURE0 = 0x84C0
+gl_mock.GL_TEXTURE_2D = 0x0DE1
+gl_mock.GL_TRIANGLE_STRIP = 0x0005
+
+opengl_mock = MagicMock()
+sys.modules['OpenGL'] = opengl_mock
+sys.modules['OpenGL.GL'] = gl_mock
+opengl_mock.GL = gl_mock
+
+from src.shader_manager import ShaderManager
+
+class TestPostProcess(unittest.TestCase):
+ def setUp(self):
+  gl_mock.reset_mock()
+  # Mock return values for shader compilation
+  gl_mock.glCreateProgram.return_value = 1
+  gl_mock.glCreateShader.return_value = 2
+  gl_mock.glGetShaderiv.return_value = 1 # GL_TRUE
+  gl_mock.glGetProgramiv.return_value = 1 # GL_TRUE
+  gl_mock.glGetUniformLocation.return_value = 10
+  
+ def test_setup_post_process_shader(self):
+  sm = ShaderManager()
+  sm.setup_post_process_shader()
+  self.assertEqual(sm.pp_program, 1)
+  gl_mock.glCreateProgram.assert_called()
+  gl_mock.glLinkProgram.assert_called_with(1)
+
+ def test_render_post_process(self):
+  sm = ShaderManager()
+  sm.pp_program = 1
+  sm.render_post_process(texture_id=5, width=800, height=600, time=1.0)
+  
+  gl_mock.glUseProgram.assert_any_call(1)
+  gl_mock.glActiveTexture.assert_called_with(gl_mock.GL_TEXTURE0)
+  gl_mock.glBindTexture.assert_any_call(gl_mock.GL_TEXTURE_2D, 5)
+  gl_mock.glUniform1f.assert_called()
+  gl_mock.glDrawArrays.assert_called_with(gl_mock.GL_TRIANGLE_STRIP, 0, 4)
+  gl_mock.glUseProgram.assert_any_call(0)
+
+if __name__ == '__main__':
+ unittest.main()