opencolorio

import os import PyOpenColorIO as OCIO def apply_color_transform(rgb_value, source_space, destination_space, ocio_config_path): # Ensure the OCIO environment variable is set for config loading if 'OCIO' not in os.environ or os.environ['OCIO'] != ocio_config_path: os.environ['OCIO'] = ocio_config_path try: config = OCIO.GetCurrentConfig() processor = config.getProcessor(source_space, destination_space) cpu_processor = processor.getDefaultCPUProcessor() # Apply the transform to an RGB tuple/list transformed_rgb = cpu_processor.applyRGB(rgb_value) return transformed_rgb except OCIO.Exception as e: print(f"OpenColorIO Error: {e}") return None # Example Usage (requires an OCIO config file to be set up) # You can download reference configs from https://github.com/AcademySoftwareFoundation/OpenColorIO-Config-ACES # For example, use 'aces_1.2/config.ocio' # NOTE: Replace with the actual path to your OCIO config file ocio_config_file = os.environ.get('OCIO_TEST_CONFIG', './config.ocio') # Placeholder for CI/testing if not os.path.exists(ocio_config_file): print(f"Warning: OCIO config file not found at '{ocio_config_file}'. Skipping quickstart example. " "Please set the OCIO_TEST_CONFIG environment variable or provide a valid path.") else: print(f"Using OCIO config: {ocio_config_file}") input_rgb = [0.5, 0.1, 0.9] # Example color in source_space src_cs = 'sRGB' dst_cs = 'ACES - ACEScg' # Note: The exact color space names depend on the loaded OCIO config. # Common ones are 'sRGB', 'ACES - ACEScg', 'Utility - Linear - sRGB', etc. transformed_color = apply_color_transform( input_rgb, src_cs, dst_cs, ocio_config_file ) if transformed_color: print(f"Original RGB ({src_cs}): {input_rgb}") print(f"Transformed RGB ({dst_cs}): {transformed_color}")