// // HIDDisplayCAPI.h // IOHIDFamily // // Created by AB on 1/10/19. // #ifndef HIDDisplayCAPI_h #define HIDDisplayCAPI_h #import <CoreFoundation/CoreFoundation.h> __BEGIN_DECLS #if defined(__cplusplus) extern "C" { #endif CF_ASSUME_NONNULL_BEGIN //preset Fields /*! @defined kHIDDisplayPresetFieldWritableKey @abstract preset field to check if data is writable. @discussion Check if preset data is writable.Return CFBooleanRef with true as writable. */ extern CFStringRef kHIDDisplayPresetFieldWritableKey; /*! @defined kHIDDisplayPresetFieldValidKey @abstract preset field to check if it can be set as active preset. @discussion Check if preset can be set as active preset .Return CFBooleanRef with true as valid. */ extern CFStringRef kHIDDisplayPresetFieldValidKey; /*! @defined kHIDDisplayPresetFieldNameKey @abstract preset field to query name. @discussion get current preset name. Return CFStringRef for preset name. */ extern CFStringRef kHIDDisplayPresetFieldNameKey; /*! @defined kHIDDisplayPresetFieldDescriptionKey @abstract preset field to query preset description. @discussion get current preset description. Return CFStringRef for preset description. */ extern CFStringRef kHIDDisplayPresetFieldDescriptionKey; /*! @defined kHIDDisplayPresetFieldDataBlockOneLengthKey @abstract preset field to query preset data block one length. @discussion get current preset data block one length. Return CFNumberRef for preset data length. */ extern CFStringRef kHIDDisplayPresetFieldDataBlockOneLengthKey; /*! @defined kHIDDisplayPresetFieldDataBlockOneKey @abstract preset field to query preset data block one. @discussion get current preset data block one. Return CFDataRef for preset data. */ extern CFStringRef kHIDDisplayPresetFieldDataBlockOneKey; /*! @defined kHIDDisplayPresetFieldDataBlockTwoLengthKey @abstract preset field to query preset data block two length. @discussion get current preset data block two length. Return CFNumberRef for preset data length. */ extern CFStringRef kHIDDisplayPresetFieldDataBlockTwoLengthKey; /*! @defined kHIDDisplayPresetFieldDataBlockTwoKey @abstract preset field to query preset data block two. @discussion get current preset data block two. Return CFDataRef for preset data. */ extern CFStringRef kHIDDisplayPresetFieldDataBlockTwoKey; /*! @defined kHIDDisplayPresetUniqueIDKey @abstract preset field to query preset uniqueID. @discussion get current preset uniqueID. Return CFStringRef for preset uniqueID. */ extern CFStringRef kHIDDisplayPresetUniqueIDKey; typedef CFTypeRef HIDDisplayDeviceRef; /*! * HIDDisplayCreateDeviceWithContainerID * * @abstract * Creates HIDDisplayDevice ref with container ID * * @discussion * Create HIDDisplayDevice object backed by actual hid device matching * given container ID. If no corresponding * HID device matches container ID , this will return NULL. * * @param containerID * Attributes which can uniquely identify display device. * * @result * Returns an instance of a HIDDisplayDevice object on success which has to be released by caller. */ HIDDisplayDeviceRef __nullable HIDDisplayCreateDeviceWithContainerID(CFStringRef containerID); /*! * HIDDisplayGetPresetCount * * @abstract * Get preset count for given display. This is readonly property * * @discussion * Get preset count for given HIDDisplayDevice object * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @result * Returns total number of display preset supported by device on success and -1 on failure. */ CFIndex HIDDisplayGetPresetCount(HIDDisplayDeviceRef hidDisplayDevice); /*! * HIDDisplayGetFactoryDefaultPresetIndex * * @abstract * Get factory default preset index set for display * * @discussion * Get factory default preset index for given HIDDisplayDevice object. This is readonly property * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param error * field which will be filled with error code on failure. * * @result * Returns factory default preset index of display device on success and -1 on failure. */ CFIndex HIDDisplayGetFactoryDefaultPresetIndex(HIDDisplayDeviceRef hidDisplayDevice, CFErrorRef *error); /*! * HIDDisplayGetPresetCapabilities * * @abstract * Get capabilites supported by preset. * * @discussion * Get CFStringRef array of preset capabilites supported by given presets supported by device. * Keys returned from this API call is subset of keys returned from HIDDisplayCopyPreset * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @result * Returns array of CFStringRef on success. */ CFArrayRef __nullable HIDDisplayGetPresetCapabilities(HIDDisplayDeviceRef hidDisplayDevice); /*! * HIDDisplayGetActivePresetIndex * * @abstract * Get active preset index for display * * @discussion * Get active preset index for given HIDDisplayDevice object. * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param error * field which will be filled with error code on failure. * * @result * Returns active preset index of display device on success and -1 on failure. */ CFIndex HIDDisplayGetActivePresetIndex(HIDDisplayDeviceRef hidDisplayDevice, CFErrorRef* error); /*! * HIDDisplaySetActivePresetIndex * * @abstract * Set active preset index for display * * @discussion * Set active preset index for given HIDDisplayDevice object. * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param presetIndex * preset index which you want to set as active index * * @param error * field which will be filled with error code on failure. * * @result * Returns true on success. */ bool HIDDisplaySetActivePresetIndex(HIDDisplayDeviceRef hidDisplayDevice, CFIndex presetIndex, CFErrorRef* error); /*! * HIDDisplayCopyPreset * * @abstract * Copy info for given preset index. * * @discussion * Copy info for given preset index. Index has to be range [0 - (presetCount-1)]. * Caller is responsible for releasing return object if nonnull * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param presetIndex * preset index for which you want to copy property * * @param error * field which will be filled with error code on failure. * * @result * Returns preset info on success. preset info is dictionary containing preset fields and value */ CFDictionaryRef __nullable HIDDisplayCopyPreset(HIDDisplayDeviceRef hidDisplayDevice, CFIndex presetIndex, CFErrorRef *error); /*! * HIDDisplaySetPreset * * @abstract * Set info for given preset index. * * @discussion * Set info for given preset index. Index has to be range [0 - (presetCount-1)]. * Returns false if info is readonly. * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param presetIndex * preset index for which you want to set property * * @param info * Dictionary of preset fields and values * * @param error * field which will be filled with error code on failure. * * @result * Returns true on success. */ bool HIDDisplaySetPreset(HIDDisplayDeviceRef hidDisplayDevice, CFIndex presetIndex, CFDictionaryRef info, CFErrorRef *error); /*! * HIDDisplayIsPresetValid * * @abstract * Check if given preset is valid. * * @discussion * Get preset valid info. Index has to be range [0 - (presetCount-1)]. * This imformation can be used to determine if given preset can be set as active preset. * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param presetIndex * preset index for which you want to set property * * * @result * Returns true if preset is valid. */ bool HIDDisplayIsPresetValid(HIDDisplayDeviceRef hidDisplayDevice, CFIndex presetIndex); /*! * HIDDisplayIsPresetWritable * * @abstract * Check if given preset is writable. * * @discussion * Get preset writable info. Index has to be range [0 - (presetCount-1)]. * This imformation can be used to determine if given preset support data write. * If preset is not writable , call to HIDDisplaySetPreset will fail with unsupported return * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param presetIndex * preset index for which you want to set property * * @result * Returns true if preset is writable. */ bool HIDDisplayIsPresetWritable(HIDDisplayDeviceRef hidDisplayDevice, CFIndex presetIndex); /*! * HIDDisplayCopyPresetUniqueID * * @abstract * Get preset unique id. * * @discussion * Get CFStringRef representing uniqueID for given preset index. Index has to be range [0 - (presetCount-1)]. * UniqueID is string representation of 128 byte UUID. Caller need to release returned string if nonnull * * @param hidDisplayDevice * HIDDisplayDevice object returned from HIDDisplayCreateDeviceWithContainerID * * @param presetIndex * preset index for which you want to set property * * @result * Returns CFStringRef for uniqueID on success. */ CFStringRef __nullable HIDDisplayCopyPresetUniqueID(HIDDisplayDeviceRef hidDisplayDevice, CFIndex presetIndex); CF_ASSUME_NONNULL_END #ifdef __cplusplus } #endif __END_DECLS #endif /* HIDDisplayCAPI_h */