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import sys import logging import ctypes from ctypes import wintypes import vcp_code from typing import Tuple
_LOGGER = logging.getLogger(__name__)
"""
# Reference [High-Level Monitor API](https://msdn.microsoft.com/en-us/library/vs/alm/dd692964(v=vs.85).aspx) [Low-Level Monitor Configuration](https://msdn.microsoft.com/en-us/library/windows/desktop/dd692982(v=vs.85).aspx)
[Monitor Control Command Set](https://en.wikipedia.org/wiki/Monitor_Control_Command_Set) https://milek7.pl/ddcbacklight/mccs.pdf
"""
def _get_physical_monitors_from_hmonitor(hmonitor: wintypes.HMONITOR) -> list: """ Retrieves the physical monitors associated with an HMONITOR monitor handle
https://msdn.microsoft.com/en-us/library/vs/alm/dd692950(v=vs.85).aspx BOOL GetPhysicalMonitorsFromHMONITOR( _In_ HMONITOR hMonitor, _In_ DWORD dwPhysicalMonitorArraySize, _Out_ LPPHYSICAL_MONITOR pPhysicalMonitorArray ); Retrieves the number of physical monitors associated with an HMONITOR monitor handle. Call this function before calling GetPhysicalMonitorsFromHMONITOR. https://msdn.microsoft.com/en-us/library/dd692948(v=vs.85).aspx BOOL GetNumberOfPhysicalMonitorsFromHMONITOR( _In_ HMONITOR hMonitor, _Out_ LPDWORD pdwNumberOfPhysicalMonitors );
:param hmonitor: :return:
""" class _PhysicalMonitorStructure(ctypes.Structure): """ PHYSICAL_MONITOR Structure. https://msdn.microsoft.com/en-us/library/vs/alm/dd692967(v=vs.85).aspx typedef struct _PHYSICAL_MONITOR { HANDLE hPhysicalMonitor; WCHAR szPhysicalMonitorDescription[PHYSICAL_MONITOR_DESCRIPTION_SIZE]; } PHYSICAL_MONITOR, *LPPHYSICAL_MONITOR;
PHYSICAL_MONITOR_DESCRIPTION_SIZE = 128 """ _fields_ = [ ("hPhysicalMonitor", wintypes.HANDLE), ("szPhysicalMonitorDescription", wintypes.WCHAR * 128) ]
phy_monitor_number = wintypes.DWORD() api_call_get_number = ctypes.windll.Dxva2.GetNumberOfPhysicalMonitorsFromHMONITOR if not api_call_get_number(hmonitor, ctypes.byref(phy_monitor_number)): _LOGGER.error(ctypes.WinError()) return [] api_call_get_monitor = ctypes.windll.Dxva2.GetPhysicalMonitorsFromHMONITOR phy_monitor_array = (_PhysicalMonitorStructure * phy_monitor_number.value)() if not api_call_get_monitor(hmonitor, phy_monitor_number, phy_monitor_array): _LOGGER.error(ctypes.WinError()) return [] return list(phy_monitor_array)
def enumerate_monitors() -> list: """ enumerate all physical monitor. ** 请注意防止返回的 Handle 对象被GC! https://msdn.microsoft.com/en-us/library/dd162610(v=vs.85).aspx BOOL EnumDisplayMonitors( _In_ HDC hdc, _In_ LPCRECT lprcClip, _In_ MONITORENUMPROC lpfnEnum, _In_ LPARAM dwData ); :return: list contains physical monitor handles """ all_hmonitor = []
_MONITOR_ENUM_PROC = ctypes.WINFUNCTYPE(wintypes.BOOL, wintypes.HMONITOR, wintypes.HDC, ctypes.POINTER(wintypes.LPRECT), wintypes.LPARAM)
def __monitor_enum_proc_callback(hmonitor_: wintypes.HMONITOR, hdc, lprect, lparam) -> bool: """ EnumDisplayMonitors callback, append HMONITOR to all_hmonitor list. :param hmonitor_: :param hdc: :param lprect: :param lparam: :return: """ all_hmonitor.append(hmonitor_) return True if not ctypes.windll.user32.EnumDisplayMonitors(None, None, _MONITOR_ENUM_PROC(__monitor_enum_proc_callback), None): raise ctypes.WinError() handles = [] for hmonitor in all_hmonitor: handles.extend(_get_physical_monitors_from_hmonitor(hmonitor)) return handles
class PhyMonitor(object): """ 一个物理显示器的VCP控制class,封装常用操作. """ def __init__(self, phy_monitor): self._phy_monitor = phy_monitor self._phy_monitor_handle = self._phy_monitor.hPhysicalMonitor self._caps_string = '' self.model = '' self.info_display_type = '' self._get_monitor_caps() if self._caps_string != '': self._get_model_info()
def _get_monitor_caps(self): """ https://msdn.microsoft.com/en-us/library/windows/desktop/dd692938(v=vs.85).aspx BOOL GetCapabilitiesStringLength( _In_ HANDLE hMonitor, _Out_ LPDWORD pdwCapabilitiesStringLengthInCharacters ); https://msdn.microsoft.com/en-us/library/windows/desktop/dd692934(v=vs.85).aspx BOOL CapabilitiesRequestAndCapabilitiesReply( _In_ HANDLE hMonitor, _Out_ LPSTR pszASCIICapabilitiesString, _In_ DWORD dwCapabilitiesStringLengthInCharacters ); :return: """ caps_string_length = wintypes.DWORD() if not ctypes.windll.Dxva2.GetCapabilitiesStringLength(self._phy_monitor_handle, ctypes.byref(caps_string_length)): _LOGGER.error(ctypes.WinError()) raise ctypes.WinError() caps_string = (ctypes.c_char * caps_string_length.value)() if not ctypes.windll.Dxva2.CapabilitiesRequestAndCapabilitiesReply( self._phy_monitor_handle, caps_string, caps_string_length): _LOGGER.error(ctypes.WinError()) return self._caps_string = caps_string.value.decode('ASCII') def _get_model_info(self): """ analyze caps string :return: """ def find_(src: str, start_: str, end_: str) -> str: """ 查找 start_ 和 end_ 之间包围的内容 :param src: 待寻找的支付串 :param start_: :param end_: :return: """ start_index = src.find(start_) if start_index == -1: return '' start_index = start_index + len(start_) end_index = src.find(end_, start_index) if end_index == -1: return '' return src[start_index:end_index] model = find_(self._caps_string, 'model(', ')') if model == '': _LOGGER.warning('unable to find model info in vcp caps string: {}'.format(self._caps_string)) self.model = model
info_display_type = find_(self._caps_string, 'type(', ')') if info_display_type == '': _LOGGER.warning('unable to find display type info in vcp caps string: {}'.format(self._caps_string)) self.info_display_type = info_display_type def close(self): """ Close WinAPI Handle. https://msdn.microsoft.com/en-us/library/windows/desktop/dd692936(v=vs.85).aspx BOOL DestroyPhysicalMonitor( _In_ HANDLE hMonitor ); :return: """ import ctypes api_call = ctypes.windll.Dxva2.DestroyPhysicalMonitor if not api_call(self._phy_monitor_handle): _LOGGER.error(ctypes.WinError()) def send_vcp_code(self, code: int, value: int) -> bool: """ send vcp code to monitor. https://msdn.microsoft.com/en-us/library/dd692979(v=vs.85).aspx BOOL SetVCPFeature( _In_ HANDLE hMonitor, _In_ BYTE bVCPCode, _In_ DWORD dwNewValue ); :param code: VCP Code :param value: Data :return: Win32 API return """ if code is None: _LOGGER.error('vcp code to send is None. ignored.') return False api_call = ctypes.windll.Dxva2.SetVCPFeature code = wintypes.BYTE(code) new_value = wintypes.DWORD(value) api_call.restype = ctypes.c_bool ret_ = api_call(self._phy_monitor_handle, code, new_value) if not ret_: _LOGGER.error('send vcp command failed: ' + hex(code)) _LOGGER.error(ctypes.WinError()) return ret_ def read_vcp_code(self, code: int) -> Tuple[int, int]: """ send vcp code to monitor, get current value and max value. https://msdn.microsoft.com/en-us/library/dd692953(v=vs.85).aspx BOOL GetVCPFeatureAndVCPFeatureReply( _In_ HANDLE hMonitor, _In_ BYTE bVCPCode, _Out_ LPMC_VCP_CODE_TYPE pvct, _Out_ LPDWORD pdwCurrentValue, _Out_ LPDWORD pdwMaximumValue ); :param code: VCP Code :return: current_value, max_value """ if code is None: _LOGGER.error('vcp code to send is None. ignored.') return 0, 0 api_call = ctypes.windll.Dxva2.GetVCPFeatureAndVCPFeatureReply api_in_vcp_code = wintypes.BYTE(code) api_out_current_value = wintypes.DWORD() api_out_max_value = wintypes.DWORD() if not api_call(self._phy_monitor_handle, api_in_vcp_code, None, ctypes.byref(api_out_current_value), ctypes.byref(api_out_max_value)): _LOGGER.error('get vcp command failed: ' + hex(code)) _LOGGER.error(ctypes.WinError()) return api_out_current_value.value, api_out_max_value.value def set_vcp_value_by_name(self, vcp_code_key: str, value: int) -> bool: """ 根据功能名称发送vcp code和数据 :param vcp_code_key: key name of vcp_code.VCP_CODE dict :param value: new value :return: """ return self.send_vcp_code(vcp_code.VCP_CODE.get(vcp_code_key), value) def get_vcp_value_by_name(self, vcp_code_key: str) -> Tuple[int, int]: """ 根据功能名称读取vcp code的值和最大值 :param vcp_code_key: key name of vcp_code.VCP_CODE dict :return: current_value, max_value """ return self.read_vcp_code(vcp_code.VCP_CODE.get(vcp_code_key)) def reset_factory(self): """ Reset monitor to factory defaults :return: """ self.set_vcp_value_by_name('Restore Factory Defaults', 1) @property def color_temperature(self): increment = self.get_vcp_value_by_name('User Color Temperature Increment')[0] current = self.get_vcp_value_by_name('User Color Temperature')[0] return 3000 + current * increment @color_temperature.setter def color_temperature(self, value: int): increment = self.get_vcp_value_by_name('User Color Temperature Increment')[0] new_value = (value - 3000) // increment self.set_vcp_value_by_name('User Color Temperature', new_value) @property def brightness_max(self): return self.get_vcp_value_by_name('Luminance')[1] @property def brightness(self): return self.get_vcp_value_by_name('Luminance')[0] @brightness.setter def brightness(self, value): """ 设置亮度 :param value: :return: """ brightness_max = self.brightness_max if value < 0 or value > brightness_max: _LOGGER.warning('invalid brightness level: {}, allowed: 0-{}'.format( value, brightness_max)) return self.set_vcp_value_by_name('Luminance', value)
@property def contrast_max(self): return self.get_vcp_value_by_name('Contrast')[1] @property def contrast(self): return self.get_vcp_value_by_name('Contrast')[0] @contrast.setter def contrast(self, value): contrast_max = self.contrast_max if value < 0 or value > contrast_max: _LOGGER.warning('invalid contrast level: {}, allowed: 0-{}'.format( value, contrast_max)) return self.set_vcp_value_by_name('Contrast', value) @property def color_preset_list(self) -> list: """ 可用的color preset, 显示器不一定全部支持 :return: """ return list(vcp_code.COLOR_PRESET_CODE.keys()) @property def color_preset(self) -> str: """ 当前的color preset :return: """ preset = self.get_vcp_value_by_name('Select Color Preset')[0] for i in list(vcp_code.COLOR_PRESET_CODE.keys()): if vcp_code.COLOR_PRESET_CODE[i] == preset: return i return '' @color_preset.setter def color_preset(self, preset: str): if preset not in self.color_preset_list: _LOGGER.warning('invalid color preset: {}, available:{}'.format( preset, self.color_preset_list)) return self.set_vcp_value_by_name('Select Color Preset', vcp_code.COLOR_PRESET_CODE.get(preset)) @property def rgb_gain_max(self): """ 最大允许设置的RGB值 ! 只取红色的RGB最大值作为3个颜色的参考 :return: """ return self.get_vcp_value_by_name('Video Gain Red')[1] @property def rgb_gain(self) -> Tuple[int, int, int]: """ :return: Red, Green, Blue """ rg = self.get_vcp_value_by_name('Video Gain Red')[0] gg = self.get_vcp_value_by_name('Video Gain Green')[0] bg = self.get_vcp_value_by_name('Video Gain Blue')[0] return rg, gg, bg @rgb_gain.setter def rgb_gain(self, value_pack): max_ = self.rgb_gain_max def check_input(value) -> bool: """ 检查传入的RGB gain :param value: :return: """ if value < 0 or value > max_: _LOGGER.warning('invalid RGB value: {}, allowed: 0-{}'.format( value, max_)) return False return True try: rg = value_pack[0] gg = value_pack[1] bg = value_pack[2] except Exception as err: _LOGGER.error(err) return if not (check_input(rg) and check_input(gg) and check_input(bg)): return self.set_vcp_value_by_name('Video Gain Red', rg) self.set_vcp_value_by_name('Video Gain Green', gg) self.set_vcp_value_by_name('Video Gain Blue', bg) def auto_setup_perform(self): """ 执行自动调整 :return: """ self.set_vcp_value_by_name('Auto Setup', vcp_code.AUTO_SETUP_CODE.get('Manual Perform')) @property def info_poweron_hours(self): """ 返回显示器的开机时间 (Hours) :return: """ return self.get_vcp_value_by_name('Display Usage Time')[0] @property def osd_languages_list(self) -> list: """ VCP 中指定的语言列表 :return: """ return list(vcp_code.OSD_LANG_CODE.keys()) @property def osd_language(self): language = self.get_vcp_value_by_name('OSD Language')[0] for i in list(vcp_code.OSD_LANG_CODE.keys()): if vcp_code.OSD_LANG_CODE[i] == language: return i return ''
@osd_language.setter def osd_language(self, language: str): if language not in self.osd_languages_list: _LOGGER.warning('invalid OSD Language: {}, available:{}'.format( language, self.osd_languages_list)) return self.set_vcp_value_by_name('OSD Language', vcp_code.OSD_LANG_CODE.get(language))
@property def power_mode_list(self) -> list: """ VCP 中指定的电源状态 :return: """ return list(vcp_code.POWER_MODE_CODE.keys())
@property def power_mode(self): power_ = self.get_vcp_value_by_name('Power Mode')[0] for i in list(vcp_code.POWER_MODE_CODE.keys()): if vcp_code.POWER_MODE_CODE[i] == power_: return i return 'off'
@power_mode.setter def power_mode(self, mode: str): if mode not in self.power_mode_list: _LOGGER.warning('invalid power mode: {}, available:{}'.format( mode, self.power_mode_list)) return self.set_vcp_value_by_name('Power Mode', vcp_code.POWER_MODE_CODE.get(mode))
@property def input_src_list(self) -> list: """ VCP 中指定的输入源 :return: """ return list(vcp_code.INPUT_SRC_CODE.keys())
@property def input_src(self): input_ = self.get_vcp_value_by_name('Input Source')[0] for i in list(vcp_code.INPUT_SRC_CODE.keys()): if vcp_code.INPUT_SRC_CODE[i] == input_: return i return ''
@input_src.setter def input_src(self, src: str): if src not in self.input_src_list: _LOGGER.warning('invalid input source: {}, available:{}'.format( src, self.input_src_list)) return self.set_vcp_value_by_name('Input Source', vcp_code.INPUT_SRC_CODE.get(src))
@property def info_pannel_type(self) -> str: pannel_type = self.get_vcp_value_by_name('Flat Panel Sub-Pixel Layout')[0] return vcp_code.FLAT_PANEL_SUB_PIXEL_LAYOUT_CODE.get(pannel_type, '')
if __name__ == '__main__': logging.basicConfig(level=logging.INFO) if sys.platform != 'win32' or sys.version_info.major != 3: _LOGGER.error('不支持的平台,需要 Windows Vista+, Python 3') sys.exit(1)
try: monitors = enumerate_monitors() except OSError: sys.exit(1)
phy_monitors = [] for h_monitor in monitors: try: monitor = PhyMonitor(h_monitor) except OSError as os_err: _LOGGER.error(os_err) continue _LOGGER.info('found {}'.format(monitor.model)) phy_monitors.append(monitor)
test_monitor = phy_monitors[0]
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