├── .gitignore ├── profiles └── README.md ├── configs ├── dim.json └── default.json ├── README.md ├── xdr-tuner.py └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | *.icc 2 | .idea/ 3 | .DS_Store 4 | -------------------------------------------------------------------------------- /profiles/README.md: -------------------------------------------------------------------------------- 1 | This directory contains generated profiles 2 | -------------------------------------------------------------------------------- /configs/dim.json: -------------------------------------------------------------------------------- 1 | { 2 | "reorder_channels": true, 3 | "maximum": { 4 | "red": 0.5, 5 | "green": 0.5, 6 | "blue": 0.5 7 | }, 8 | "gamma": { 9 | "red": 1.0, 10 | "green": 1.0, 11 | "blue": 1.0 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /configs/default.json: -------------------------------------------------------------------------------- 1 | { 2 | "reorder_channels": true, 3 | "maximum": { 4 | "red": 1, 5 | "green": 0.945, 6 | "blue": 0.955 7 | }, 8 | "gamma": { 9 | "red": 1.0, 10 | "green": 1.0, 11 | "blue": 1.0 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # XDR Tuner 2 | 3 | #### Adjust the white point, gamma or make your XDR display darker without losing HDR peak luminance or the ability to adjust display brightness 4 | 5 | Project: https://github.com/supercurio/xdr-tuner 6 | 7 | ## Purpose 8 | 9 | On the 2021 MacBook Pro M1 Pro & M1 Max running macOS Monterey 12.0.1, the 10 | *"Apple XDR Display (P3-1600 nits)"* and *"Apple Display (P3-500 nits)"* 11 | presets calibration cannot be "fine-tuned" in the display settings. 12 | 13 | At the same time, calibrating the display using a sensor with X-Rite 14 | i1Profiler clips all the colors above SDR levels to SDR maximums, 15 | preventing the system to show HDR content. 16 | 17 | However, there is a variation in the factory calibration between units, 18 | and the white point on yours might not perceptually matching the D65 spec, 19 | nor your other calibrated displays. 20 | 21 | XDR Tuner lifts all the restrictions of the display presets by leveraging 22 | the support of full dynamic range max and gamma parameters for 23 | red/green/blue channels in ColorSync ICC profiles `vcgt` tag. 24 | 25 | This allows to change the display's white point freely without limiting 26 | losing HDR support, limiting HDR peak brightness to full-screen luminance, 27 | losing the ability to adjust brightness or introducing banding artifacts. 28 | 29 | ## Usage 30 | 31 | This is script, it will need to be launched in a terminal like 32 | in the Terminal application. 33 | Once your command shell is in this directory, 34 | you will be able to launch the script with the following commands. 35 | 36 | ### Launch with default settings and sample configuration 37 | `./xdr-tuner.py` 38 | 39 | This will create a custom profile based on your system-generated one 40 | for your display, and apply it immediately. 41 | 42 | ### Re-apply current custom profile 43 | `./xdr-tuner.py --re-apply` 44 | 45 | Useful after changing display preset in Display Preferences. 46 | 47 | ### Enable auto-load of profile at start for your user 48 | `./xdr-tuner.py --auto-apply` 49 | 50 | Creates a LaunchAgents plist file to automatically load the custom profile 51 | set currently after user login. 52 | It will call XDR Tuner from its current directory. 53 | 54 | Use `./xdr-tuner.py --remove-auto-apply` command to disable auto-apply. 55 | 56 | ### Customize config and apply automatically 57 | `./xdr-tuner.py --loop` 58 | 59 | Then modify configs/default.json in any text editor until you get 60 | the desired color presentation. 61 | Typically, you can open a white page or image and color-match 62 | the white point of the XDR display visually with a reference monitor. 63 | 64 | Once finished, interrupt xdr-tuner with ctrl-c. 65 | 66 | ### I would only like to lower the minimum brightness 67 | `./xdr-tuner.py --config configs/dim.json` 68 | 69 | If you find the display still too bright at the minimum brightness 70 | allowed by the system, applying the dark config will allow to make it 71 | darker. By changing the values for red, green and blue in the `max` 72 | section, you can make the display as dark as you'd like. 73 | 74 | Changing the gamma to values lower than 1 might help with legibility 75 | when the screen is very dim. 76 | 77 | ## Reset to factory profile 78 | `./xdr-tuner.py --factory` 79 | 80 | ## Set and apply an existing ICC profile 81 | `./xdr-tuner.py -a path/to/your-profile.icc` 82 | 83 | ## Print help 84 | `./xdr-tuner.py --help` 85 | 86 | 87 | ## Compatible with TrueTone and Night Shift 88 | 89 | Both functionalities will work as expected, using your tuned display 90 | profile as reference, with no difference compared to factory calibration. 91 | 92 | ## Limitations & TODO 93 | 94 | * This utility was not tested yet with multiple displays connected. 95 | Support will be added in a future version. 96 | * Switching between presets in Display Preferences resets the tuning, 97 | which needs to be re-applied manually. It looks like a bug in macOS 98 | color management, which should re-apply the current profile by itself. 99 | I recommend using the command `./xdr-tuner.py --r` to re-apply the 100 | custom profile. 101 | * No GUI: someone experienced with macOS gui app development is welcome 102 | to contribute a gui for this, or use this script as a mean to generate and 103 | apply the profiles. The license is liberal so maybe you will create your 104 | own utility inspired by this. 105 | Would appreciate a mention and shout out! 106 | * Ultimately, I think Apple should provide this capability out of the box in 107 | a system update. Hopefully, various display calibration software will gain 108 | full HDR support. This is still very new. 109 | * Better error management needs to be implemented 110 | 111 | 112 | ## Bugs and issues 113 | 114 | Please report any issue encountered in 115 | [the dedicated section on Github](https://github.com/supercurio/xdr-tuner/issues). 116 | 117 | This will help me or contributors to improve this software. 118 | 119 | 120 | ## Story behind this 121 | 122 | After recently receiving my 2021 MacBook Pro 16.2, I was happy with the 123 | device overall but really bummed that its display had too much blue 124 | and green, giving a greyish-green tint to all content displays. 125 | 126 | Exploring the tuning option offered and trying i1Profiler led to 127 | unsatisfactory results as I didn't want to give up on 1600-nits HDR 128 | peak brightness nor the ability to adjust display brightness, including 129 | automatically with the light sensor. 130 | 131 | My options were to return it, wait 2 months for a new custom order to 132 | be fulfilled and hope for the best on the new factory calibration, or 133 | give it for repair, giving up the ability to return it later and with 134 | unknown results. 135 | 136 | So I decided to use all this frustration as motivation and leveraged 137 | my experience with display calibration and development. 138 | 139 | And I'm very happy with the results :D 140 | 141 | This solves all the problems I had with color matching displays. 142 | Tuning is also a lot easier than by setting Yxy coordinates in 143 | Apple's solution, which is currently not very useful as the 144 | popular colorimeter sensors are lacking corrections matrices for the 145 | new type of phosphors the Liquid Retina XDR display are using. 146 | Very few people can access a high resolution spectrophotometer that 147 | which is required to do a real D65 and colorspace calibration on this 148 | panel otherwise. 149 | I tested my old i1Pro, its results are worthless with all the illuminant observer 150 | types known. 151 | 152 | ## Credits 153 | 154 | Thanks to [Timothy Sutton](https://github.com/timsutton) with 155 | [customdisplayprofiles](https://github.com/timsutton/customdisplayprofiles) and 156 | Chromium authors with [color_profile_manager_mac.py](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/content/test/gpu/gpu_tests/color_profile_manager_mac.py) 157 | for the inspiration and sample code. 158 | 159 | 160 | ## Author 161 | François Simond (supercurio) 162 | https://twitter.com/supercurio 163 | -------------------------------------------------------------------------------- /xdr-tuner.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/python2.7 2 | # coding=utf-8 3 | 4 | # Author: François Simond (supercurio) 5 | # project: https://github.com/supercurio/xdr-tuner 6 | # license: Apache 2 (see LICENSE) 7 | 8 | from __future__ import print_function 9 | 10 | import signal 11 | import sys 12 | import time 13 | from Carbon.CoreFoundation import kCFURLPOSIXPathStyle 14 | import Foundation 15 | import Quartz 16 | import objc 17 | import struct 18 | import json 19 | from optparse import OptionParser 20 | import os 21 | 22 | version = "0.2" 23 | 24 | color_sync_framework = '/System/Library/Frameworks/ApplicationServices.framework/' \ 25 | 'Versions/A/Frameworks/ColorSync.framework' 26 | 27 | color_sync_bridge_string = """ 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | """ 48 | 49 | objc.parseBridgeSupport(color_sync_bridge_string, globals(), 50 | color_sync_framework) 51 | 52 | 53 | def get_device_info(): 54 | online_display_list_result = Quartz.CGGetOnlineDisplayList(32, None, None) 55 | error = online_display_list_result[0] 56 | if error != Quartz.kCGErrorSuccess: 57 | raise Exception('Failed to get online displays from Quartz') 58 | display_id = online_display_list_result[1][0] 59 | device_info = ColorSyncDeviceCopyDeviceInfo(kColorSyncDisplayDeviceClass, 60 | CGDisplayCreateUUIDFromDisplayID(display_id)) 61 | if not device_info: 62 | raise Exception('KVM connection on bot is broken, please file a bug') 63 | return device_info 64 | 65 | 66 | def get_device_id(): 67 | return get_device_info()['DeviceID'] 68 | 69 | 70 | def get_factory_profile_path(): 71 | device_info = get_device_info() 72 | factory_profile_url = device_info['FactoryProfiles']['1']['DeviceProfileURL'] 73 | return Foundation.CFURLCopyFileSystemPath(factory_profile_url, kCFURLPOSIXPathStyle) 74 | 75 | 76 | def get_custom_profile_path(): 77 | device_info = get_device_info() 78 | custom_profiles = device_info.get('CustomProfiles') 79 | if custom_profiles: 80 | factory_profile_url = custom_profiles['1'] 81 | return Foundation.CFURLCopyFileSystemPath(factory_profile_url, kCFURLPOSIXPathStyle) 82 | else: 83 | return None 84 | 85 | 86 | def set_display_custom_profile(profile_path): 87 | if profile_path is None: 88 | profile_url = Foundation.kCFNull 89 | else: 90 | profile_url = Foundation.CFURLCreateFromFileSystemRepresentation(None, profile_path.encode('utf-8'), 91 | len(profile_path), False) 92 | profile_info = { 93 | kColorSyncDeviceDefaultProfileID: profile_url, 94 | kColorSyncProfileUserScope: Foundation.kCFPreferencesCurrentUser 95 | } 96 | device_id = get_device_id() 97 | result = ColorSyncDeviceSetCustomProfiles(kColorSyncDisplayDeviceClass, device_id, profile_info) 98 | if not result: 99 | raise Exception('Failed to set display custom profile') 100 | 101 | 102 | def modify_profile(factory_profile, config, out_file): 103 | f = open(factory_profile, 'rb') 104 | profile_data = f.read() 105 | f.close() 106 | 107 | # find the offset 108 | tag = 'vcgt' 109 | tag_offset = profile_data.find(tag, profile_data.find(tag) + 4) 110 | 111 | # parse the table 112 | vcgt_data_fmt = '>9i' 113 | vcgt_data_offset = tag_offset + 12 114 | vcgt_struct = struct.Struct(vcgt_data_fmt) 115 | (red_gamma, red_min, red_max, 116 | green_gamma, green_min, green_max, 117 | blue_gamma, blue_min, blue_max) = vcgt_struct.unpack_from(profile_data, vcgt_data_offset) 118 | 119 | maximum = config['maximum'] 120 | red_max = round(red_max * maximum['red']) 121 | green_max = round(green_max * maximum['green']) 122 | blue_max = round(blue_max * maximum['blue']) 123 | 124 | gamma = config['gamma'] 125 | red_gamma = round(red_gamma * gamma['red']) 126 | green_gamma = round(green_gamma * gamma['green']) 127 | blue_gamma = round(blue_gamma * gamma['blue']) 128 | 129 | buff = bytearray(profile_data) 130 | 131 | if config['reorder_channels']: 132 | vcgt_struct.pack_into(buff, vcgt_data_offset, 133 | green_gamma, green_min, green_max, 134 | blue_gamma, blue_min, blue_max, 135 | red_gamma, red_min, red_max) 136 | else: 137 | vcgt_struct.pack_into(buff, vcgt_data_offset, 138 | red_gamma, red_min, red_max, 139 | green_gamma, green_min, green_max, 140 | blue_gamma, blue_min, blue_max) 141 | 142 | out = open(out_file, 'wb') 143 | out.write(buff) 144 | 145 | 146 | def read_config(config_file): 147 | return json.load(open(config_file, 'r')) 148 | 149 | 150 | def set_auto_apply(status): 151 | plist_file = os.path.expanduser('~') + "/Library/LaunchAgents/xdr-tuner-auto-apply.plist" 152 | if status: 153 | os.system("plutil -create xml1 " + plist_file) 154 | os.system("plutil -insert \"Label\" -string \"XDR Tuner\" " + plist_file) 155 | os.system("plutil -insert \"ProgramArguments\" -array " + plist_file) 156 | os.system("plutil -insert \"ProgramArguments.0\" -string \"{}\" ".format(os.path.realpath(__file__)) 157 | + plist_file) 158 | os.system("plutil -insert \"ProgramArguments.1\" -string \"-r\" " + plist_file) 159 | os.system("plutil -insert \"RunAtLoad\" -bool YES " + plist_file) 160 | else: 161 | try: 162 | os.remove(plist_file) 163 | except OSError: 164 | print("No auto-apply to remove") 165 | 166 | 167 | def signal_handler(sig, frame): 168 | print('Stopped the tuning loop.') 169 | sys.exit(0) 170 | 171 | 172 | def main(): 173 | print("Liquid Retina XDR display tuner v{}\n".format(version), 174 | " by François Simond (supercurio)\n", 175 | " https://github.com/supercurio/xdr-tuner\n") 176 | 177 | signal.signal(signal.SIGINT, signal_handler) 178 | 179 | script_path = os.path.dirname(os.path.realpath(__file__)) 180 | 181 | parser = OptionParser() 182 | parser.add_option("-o", "--out", dest="out_file", default=script_path + "/profiles/tuned.icc", 183 | help="output ICC file") 184 | parser.add_option("-c", "--config", dest="config_file", default=script_path + "/configs/default.json", 185 | help="read config from a custom JSON file") 186 | parser.add_option("-l", "--loop", dest="loop", action="store_true", default=False, 187 | help="apply the config in a loop until interrupted") 188 | parser.add_option("-f", "--factory", dest="factory", action="store_true", default=False, 189 | help="reset to factory profile") 190 | parser.add_option("-a", "--apply", dest="apply_icc", default="", help="apply ICC profile") 191 | parser.add_option("-r", "--re-apply", dest="re_apply", action="store_true", default=False, 192 | help="re-apply last custom profile set") 193 | parser.add_option("-t", "--auto-apply", dest="auto_apply", action="store_true", default=False, 194 | help="enable auto load of custom profile at start") 195 | parser.add_option("-u", "--remove-auto-apply", dest="remove_auto_apply", action="store_true", default=False, 196 | help="disable auto load of custom profile at start") 197 | (options, _) = parser.parse_args() 198 | 199 | if options.apply_icc: 200 | print("Apply existing profile: " + options.apply_icc) 201 | set_display_custom_profile(options.apply_icc) 202 | return 203 | 204 | if options.factory: 205 | print("Reset to factory profile") 206 | set_display_custom_profile(None) 207 | return 208 | 209 | if options.re_apply: 210 | current_custom_profile = get_custom_profile_path() 211 | if current_custom_profile: 212 | print("Reapply custom profile: " + current_custom_profile) 213 | set_display_custom_profile(current_custom_profile) 214 | else: 215 | print("No custom profile set to re-apply") 216 | return 217 | 218 | if options.auto_apply: 219 | print("Enable loading of custom profile at start") 220 | set_auto_apply(True) 221 | return 222 | 223 | if options.remove_auto_apply: 224 | print("Disable loading of custom profile at start") 225 | set_auto_apply(False) 226 | return 227 | 228 | out_file = options.out_file 229 | factory_profile = get_factory_profile_path() 230 | print("Factory ICC profile:\n " + factory_profile) 231 | print("Output ICC profile:\n " + out_file) 232 | 233 | if options.loop: 234 | print("\nReloading " + options.config_file + " in a loop:") 235 | 236 | while True: 237 | config = read_config(options.config_file) 238 | modify_profile(factory_profile, config, out_file) 239 | set_display_custom_profile(out_file) 240 | if not options.loop: 241 | return 242 | print('.', end='') 243 | sys.stdout.flush() 244 | time.sleep(1 / 4.0) 245 | 246 | 247 | if 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