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| -rw-r--r-- | src/libgamma_method.py | 572 |
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diff --git a/src/libgamma_method.py b/src/libgamma_method.py new file mode 100644 index 0000000..7edd4a9 --- /dev/null +++ b/src/libgamma_method.py @@ -0,0 +1,572 @@ +# -*- python -*- +''' +pylibgamma — Python 3 wrapper for libgamma +Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) + +This library is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this library. If not, see <http://www.gnu.org/licenses/>. +''' + + + +LIBGAMMA_METHOD_DUMMY = 0 +''' +The identifier for the dummy adjustment method. +This method can be configured and is useful for +testing your program's ability to handle errors. +''' + +LIBGAMMA_METHOD_X_RANDR = 1 +''' +The identifier for the adjustment method with +uses the RandR protocol under the X display server. +''' + +LIBGAMMA_METHOD_X_VIDMODE = 2 +''' +The identifier for the adjustment method with +uses the VidMode protocol under the X display server. +This is an older alternative to RandR that can +work on some drivers that are not supported by RandR, +however it can only control the primary CRTC per +screen (partition). +''' + +LIBGAMMA_METHOD_LINUX_DRM = 3 +''' +The identifier for the Direct Rendering Manager +adjustment method that is available in Linux +(built in to the Linux kernel with a userland +library for access) and is a part of the +Direct Rendering Infrastructure. This adjustment +method all work when you are in non-graphical +mode; however a display server cannnot be +started while this is running, but it can be +started while a display server is running. +''' + +LIBGAMMA_METHOD_W32_GDI = 4 +''' +The identifier for the Graphics Device Interface +adjustment method that is available in Windows. +This method is not well tested; it can be compiled +to be available under X.org using a translation layer. +''' + +LIBGAMMA_METHOD_QUARTZ_CORE_GRAPHICS = 5 +''' +The identifier for the CoreGraphics adjustment +method that is available in Mac OS X that can +adjust gamma ramps under the Quartz display server. +This method is not well tested; it can be compiled +to be available under X.org using a translation layer. +''' + + +LIBGAMMA_METHOD_MAX = 5 +''' +The index of the last gamma method, neither it +nor any index before it may actually be supported +as it could have been disabled at compile-time +''' + +LIBGAMMA_METHOD_COUNT = (LIBGAMMA_METHOD_MAX + 1) +''' +The number adjustment methods provided by this library. +Note however that this includes adjstment methods that +have been removed at compile-time. +''' + + +class MethodCapabilities: + ''' + Capabilities of adjustment methods + + ---- Integers variables ---- + + @variable crtc_information OR of the CRTC information fields in `CRTCInformation` + that may (but can fail) be read successfully. + + ---- Boolean variables ---- + + @variable default_site_known Whether the default site is known, if true the site is integrated + to the system or can be determined using environment variables. + @variable multiple_sites Whether the adjustment method supports multiple sites rather + than just the default site. + @variable multiple_partitions Whether the adjustment method supports multiple partitions + per site. + @variable multiple_crtcs Whether the adjustment method supports multiple CRTC:s + per partition per site. + @variable partitions_are_graphics_cards Whether the partition to graphics card is a bijection. + @variable site_restore Whether the adjustment method supports `site_restore`. + @variable partition_restore Whether the adjustment method supports `partition_restore`. + @variable crtc_restore Whether the adjustment method supports `crtc_restore`. + @variable identical_gamma_sizes Whether the `red_gamma_size`, `green_gamma_size` and + `blue_gamma_size` fields in `CRTCInformation` will always + have the same values as each other for the adjustment method. + @variable fixed_gamma_size Whether the `red_gamma_size`, `green_gamma_size` and + `blue_gamma_size` fields in `CRTCInformation` will always be + filled with the same value for the adjustment method. + @variable fixed_gamma_depth Whether the `gamma_depth` field in `CRTCInformation` will + always be filled with the same value for the adjustment method. + @variable real Whether the adjustment method will actually perform adjustments. + @variable fake Whether the adjustment method is implement using a translation + layer. + ''' + + def __init__(self, crtc_information : int = 0, booleans : int = 0): + ''' + Constructor + + @param crtc_information The value for `CRTCInformation` + @param booleans The value for each booleanic variable + ''' + self.crtc_information = crtc_information + self.default_site_known = (booleans & (1 << 0)) != 0 + self.multiple_sites = (booleans & (1 << 1)) != 0 + self.multiple_partitions = (booleans & (1 << 2)) != 0 + self.multiple_crtcs = (booleans & (1 << 3)) != 0 + self.partitions_are_graphics_cards = (booleans & (1 << 4)) != 0 + self.site_restore = (booleans & (1 << 5)) != 0 + self.partition_restore = (booleans & (1 << 6)) != 0 + self.crtc_restore = (booleans & (1 << 7)) != 0 + self.identical_gamma_sizes = (booleans & (1 << 8)) != 0 + self.fixed_gamma_size = (booleans & (1 << 9)) != 0 + self.fixed_gamma_depth = (booleans & (1 << 10)) != 0 + self.real = (booleans & (1 << 11)) != 0 + self.fake = (booleans & (1 << 12)) != 0 + + +class CRTCInformation: + ''' + Cathode ray tube controller information data structure. + + @variable edid:bytes The Extended Display Identification Data associated with + the attached monitor. This is raw byte array that is usually + 128 bytes long. + @variable edid_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable width_mm:int The phyical width, in millimetres, of the viewport of the + attached monitor, as reported by the adjustment method. This + value may be incorrect, which is a known issue with the X + server where it is the result of the X server attempting + the estimate the size on its own. + Zero means that its is not applicable, which is the case + for projectors. + @variable width_mm_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + @variable height_mm:int The phyical height, in millimetres, of the viewport of the + attached monitor, as reported by the adjustment method. This + value may be incorrect, which is a known issue with the X + server where it is the result of the X server attempting + the estimate the size on its own. + Zero means that its is not applicable, which is the case + for projectors. + @variable height_mm_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable width_mm_edid:int The phyical width, in millimetres, of the viewport of the + attached monitor, as reported by it the monitor's Extended + Display Information Data. This value can only contain whole + centimetres, which means that the result is always zero + modulus ten. However, this could change with revisions of + the EDID structure. + Zero means that its is not applicable, which is the case + for projectors. + @variable width_mm_edid_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + @variable height_mm_edid:int The phyical height, in millimetres, of the viewport of the + attached monitor, as reported by it the monitor's Extended + Display Information Data. This value can only contain whole + centimetres, which means that the result is always zero + modulus ten. However, this could change with revisions of + the EDID structure. + Zero means that its is not applicable, which is the case + for projectors. + @variable height_mm_edid_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable red_gamma_size:int The size of the encoding axis of the red gamma ramp. + @variable green_gamma_size:int The size of the encoding axis of the green gamma ramp. + @variable blue_gamma_size:int The size of the encoding axis of the blue gamma ramp. + @variable gamma_size_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable gamma_depth:int The bit-depth of the value axes of gamma ramps, + -1 for single precision floating point, and -2 for + double precision floating point. + @variable gamma_depth_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable gamma_support:int Non-zero gamma ramp adjustments are supported. + @variable gamma_support_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable subpixel_order:int The layout of the subpixels. + You cannot count on this value — especially for CRT:s — + but it is provided anyway as a means of distinguishing monitors. + @variable subpixel_order_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable active:bool Whether there is a monitors connected to the CRTC. + @variable active_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable connector_name:str The name of the connector as designated by the display + server or as give by this library in case the display + server lacks this feature. + @variable connector_name_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable connector_type:int The type of the connector that is associated with the CRTC. + @variable connector_type_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + + @variable gamma_red:float The gamma characteristics of the monitor as reported + in its Extended Display Information Data. The value + holds the value for the red channel. If you do not have + and more accurate measurement of the gamma for the + monitor this could be used to give a rought gamma + correction; simply divide the value with 2.2 and use + the result for the red channel in the gamma correction. + @variable gamma_green:float The gamma characteristics of the monitor as reported + in its Extended Display Information Data. The value + holds the value for the green channel. If you do not have + and more accurate measurement of the gamma for the + monitor this could be used to give a rought gamma + correction; simply divide the value with 2.2 and use + the result for the green channel in the gamma correction. + @variable gamma_blue:float The gamma characteristics of the monitor as reported + in its Extended Display Information Data. The value + holds the value for the blue channel. If you do not have + and more accurate measurement of the gamma for the + monitor this could be used to give a rought gamma + correction; simply divide the value with 2.2 and use + the result for the blue channel in the gamma correction. + @variable gamma_error:int Zero on success, positive it holds the value `errno` had + when the reading failed, otherwise (negative) the value + of an error identifier provided by this library. + ''' + + def __init__(self): + ''' + Constructor + ''' + pass + + +LIBGAMMA_CONNECTOR_TYPE_Unknown = 0 +''' +The adjustment method does not know the connector's type +(This could be considered an error). +''' + +LIBGAMMA_CONNECTOR_TYPE_VGA = 1 +''' +Video Graphics Array (VGA). +''' + +LIBGAMMA_CONNECTOR_TYPE_DVI = 2 +''' +Digital Visual Interface, unknown type. +''' + +LIBGAMMA_CONNECTOR_TYPE_DVII = 3 +''' +Digital Visual Interface, integrated (DVI-I). +''' + +LIBGAMMA_CONNECTOR_TYPE_DVID = 4 +''' +Digital Visual Interface, digital only (DVI-D). +''' + +LIBGAMMA_CONNECTOR_TYPE_DVIA = 5 +''' +Digital Visual Interface, analogue only (DVI-A). +''' + +LIBGAMMA_CONNECTOR_TYPE_Composite = 6 +''' +Composite video. +''' + +LIBGAMMA_CONNECTOR_TYPE_SVIDEO = 7 +''' +Separate Video (S-video). +''' + +LIBGAMMA_CONNECTOR_TYPE_LVDS = 8 +''' +Low-voltage differential signaling (LVDS). +''' + +LIBGAMMA_CONNECTOR_TYPE_Component = 9 +''' +Component video, usually separate cables for each channel. +''' + +LIBGAMMA_CONNECTOR_TYPE_9PinDIN = 10 +''' +9 pin DIN (Deutsches Institut für Normung) connector. +''' + +LIBGAMMA_CONNECTOR_TYPE_DisplayPort = 11 +''' +DisplayPort. +''' + +LIBGAMMA_CONNECTOR_TYPE_HDMI = 12 +''' +High-Definition Multimedia Interface (HDMI), unknown type. +''' + +LIBGAMMA_CONNECTOR_TYPE_HDMIA = 13 +''' +High-Definition Multimedia Interface, type A (HDMI-A). +''' + +LIBGAMMA_CONNECTOR_TYPE_HDMIB = 14 +''' +High-Definition Multimedia Interface, type B (HDMI-B). +''' + +LIBGAMMA_CONNECTOR_TYPE_TV = 15 +''' +Television, unknown connector. +''' + +LIBGAMMA_CONNECTOR_TYPE_eDP = 16 +''' +Embedded DisplayPort (eDP). +''' + +LIBGAMMA_CONNECTOR_TYPE_VIRTUAL = 17 +''' +A virtual connector. +''' + +LIBGAMMA_CONNECTOR_TYPE_DSI = 18 +''' +Display Serial Interface (DSI). +''' + +LIBGAMMA_CONNECTOR_TYPE_LFP = 19 +''' +LFP connector. +(If you know what this is add it to Wikipedia.) +''' + + +LIBGAMMA_CONNECTOR_TYPE_COUNT = 20 +''' +The number of `LIBGAMMA_CONNECTOR_*` values defined. +''' + + + +LIBGAMMA_SUBPIXEL_ORDER_UNKNOWN = 0 +''' +The adjustment method does not know the order of the subpixels. +(This could be considered an error.) +''' + +LIBGAMMA_SUBPIXEL_ORDER_NONE = 1 +''' +There are no subpixels in the monitor. +''' + +LIBGAMMA_SUBPIXEL_ORDER_HORIZONTAL_RGB = 2 +''' +The subpixels are ordered red, green and then blue, from left to right. +''' + +LIBGAMMA_SUBPIXEL_ORDER_HORIZONTAL_BGR = 3 +''' +The subpixels are ordered blue, green and then red, from left to right. +''' + +LIBGAMMA_SUBPIXEL_ORDER_VERTICAL_RGB = 4 +''' +The subpixels are ordered red, green and then blue, from the top down. +''' + +LIBGAMMA_SUBPIXEL_ORDER_VERTICAL_BGR = 5 +''' +The subpixels are ordered blue, green and then red, from the top down. +''' + + +LIBGAMMA_SUBPIXEL_ORDER_COUNT = 6 +''' +The number of `LIBGAMMA_SUBPIXEL_ORDER_*` values defined. +''' + + + +LIBGAMMA_CRTC_INFO_EDID = 1 << 0 +''' +For a `CRTCInformation` fill in the +values for `edid` and `edid_length` and report errors to `edid_error`. +''' + +LIBGAMMA_CRTC_INFO_WIDTH_MM = 1 << 1 +''' +For a `CRTCInformation` fill in the +value for `width_mm` and report errors to `width_mm_error`. +''' + +LIBGAMMA_CRTC_INFO_HEIGHT_MM = 1 << 2 +''' +For a `CRTCInformation` fill in the +value for `height_mm` and report errors to `height_mm_error`. +''' + +LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID = 1 << 3 +''' +For a `CRTCInformation` fill in the +value for `width_mm_edid` and report errors to `width_mm_edid_error`. +''' + +LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID = 1 << 4 +''' +For a `CRTCInformation` fill in the +value for `height_mm_edid` and report errors to `height_mm_edid_error`. +''' + +LIBGAMMA_CRTC_INFO_GAMMA_SIZE = 1 << 5 +''' +For a `CRTCInformation` fill in the +values for `red_gamma_size`, `green_gamma_size` and `blue_gamma_size`. +and report errors to `gamma_size_error` +''' + +LIBGAMMA_CRTC_INFO_GAMMA_DEPTH = 1 << 6 +''' +For a `CRTCInformation` fill in the +value for `gamma_depth` and report errors to `gamma_depth_error`. +''' + +LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT = 1 << 7 +''' +For a `CRTCInformation` fill in the +value for `gamma_support` and report errors to `gamma_support_error`. +''' + +LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER = 1 << 8 +''' +For a `CRTCInformation` fill in the +value for `subpixel_order` and report errors to `subpixel_order_error`. +''' + +LIBGAMMA_CRTC_INFO_ACTIVE = 1 << 9 +''' +For a `CRTCInformation` fill in the +value for `active` and report errors to `active_error`. +''' + +LIBGAMMA_CRTC_INFO_CONNECTOR_NAME = 1 << 10 +''' +For a `CRTCInformation` fill in the +value for `connector_name` and report errors to `connector_name_error`. +''' + +LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE = 1 << 11 +''' +For a `CRTCInformation` fill in the +value for `connector_type` and report errors to `connector_type_error`. +''' + +LIBGAMMA_CRTC_INFO_GAMMA = 1 << 12 +''' +For a `CRTCInformation` fill in the +values for `gamma_red`, `gamma_green` and `gamma_blue` +and report errors to `gamma_error`. +''' + + +LIBGAMMA_CRTC_INFO_COUNT = 13 +''' +The number of `LIBGAMMA_CRTC_INFO_*` values defined. +''' + + + +''' +Macro for both `CRTCInformation` fields +that can specify the size of the monitor's viewport +as specified in the monitor's Extended Display +Information Data. +''' +LIBGAMMA_CRTC_INFO_MACRO_EDID_VIEWPORT = LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID | + LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID + +''' +Macro for all `CRTCInformation` fields +that can be filled if the adjustment method have +support for reading the monitors' Extended Display +Information Data. +''' +LIBGAMMA_CRTC_INFO_MACRO_EDID = LIBGAMMA_CRTC_INFO_EDID | + LIBGAMMA_CRTC_INFO_MACRO_EDID_VIEWPORT | + LIBGAMMA_CRTC_INFO_GAMMA + +''' +Macro for both `CRTCInformation` fields +that can specify the size of the monitor's viewport +as provided by the adjustment method without this +library having to parse the monitor's Extended Display +Information Data. +''' +LIBGAMMA_CRTC_INFO_MACRO_VIEWPORT = LIBGAMMA_CRTC_INFO_WIDTH_MM | + LIBGAMMA_CRTC_INFO_HEIGHT_MM + +''' +Macro for the `CRTCInformation` fields +that specifies the CRTC's gamma ramp sizes and gamma +ramp depth. +''' +LIBGAMMA_CRTC_INFO_MACRO_RAMP = LIBGAMMA_CRTC_INFO_GAMMA_SIZE | + LIBGAMMA_CRTC_INFO_GAMMA_DEPTH + +''' +Macro for the `CRTCInformation` fields +that specifies the CRTC's connector type and the +partition unique name of the connector. +''' +LIBGAMMA_CRTC_INFO_MACRO_CONNECTOR = LIBGAMMA_CRTC_INFO_CONNECTOR_NAME | + LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE + +''' +Macro for the `CRTCInformation` fields +that required there is a monitor attached to the connector, +and that status itself. +''' +LIBGAMMA_CRTC_INFO_MACRO_ACTIVE = LIBGAMMA_CRTC_INFO_MACRO_EDID | + LIBGAMMA_CRTC_INFO_MACRO_VIEWPORT | + LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER | + LIBGAMMA_CRTC_INFO_ACTIVE + |