Add ICC profile and data tags

src/ImageSharp/MetaData/Profiles/ICC/IccDataType.cs

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+// <copyright file="IccDataType.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageSharp
+{
+    /// <summary>
+    /// Enumerates the basic data types as defined in ICC.1:2010 version 4.3.0.0
+    /// <see href="http://www.color.org/specification/ICC1v43_2010-12.pdf"/> Section 4.2 to 4.15
+    /// </summary>
+    public enum IccDataType
+    {
+        /// <summary>
+        /// A 12-byte value representation of the time and date
+        /// </summary>
+        DateTime,
+
+        /// <summary>
+        /// A single-precision 32-bit floating-point  as specified in IEEE 754,
+        /// excluding un-normalized s, infinities, and not a "" (NaN) values
+        /// </summary>
+        Float32,
+
+        /// <summary>
+        /// Positions of some data elements are indicated using a position offset with the data element's size.
+        /// </summary>
+        Position,
+
+        /// <summary>
+        /// An 8-byte value, used to associate a normalized device code with a measurement value
+        /// </summary>
+        Response16,
+
+        /// <summary>
+        /// A fixed signed 4-byte (32-bit) quantity which has 16 fractional bits
+        /// </summary>
+        S15Fixed16,
+
+        /// <summary>
+        /// A fixed unsigned 4-byte (32-bit) quantity having 16 fractional bits
+        /// </summary>
+        U16Fixed16,
+
+        /// <summary>
+        /// A fixed unsigned 2-byte (16-bit) quantity having15 fractional bits
+        /// </summary>
+        U1Fixed15,
+
+        /// <summary>
+        ///  A fixed unsigned 2-byte (16-bit) quantity having 8 fractional bits
+        /// </summary>
+        U8Fixed8,
+
+        /// <summary>
+        /// An unsigned 2-byte (16-bit) integer
+        /// </summary>
+        UInt16,
+
+        /// <summary>
+        /// An unsigned 4-byte (32-bit) integer
+        /// </summary>
+        UInt32,
+
+        /// <summary>
+        /// An unsigned 8-byte (64-bit) integer
+        /// </summary>
+        UInt64,
+
+        /// <summary>
+        /// An unsigned 1-byte (8-bit) integer
+        /// </summary>
+        UInt8,
+
+        /// <summary>
+        /// A set of three fixed signed 4-byte (32-bit) quantities used to encode CIEXYZ, nCIEXYZ, and PCSXYZ tristimulus values
+        /// </summary>
+        XYZ,
+
+        /// <summary>
+        /// Alpha-numeric values, and other input and output codes, shall conform to the American Standard Code for
+        /// Information Interchange (ASCII) specified in ISO/IEC 646.
+        /// </summary>
+        Ascii
+    }
+}

src/ImageSharp/MetaData/Profiles/ICC/IccProfileTag.cs

@@ -0,0 +1,358 @@
+// <copyright file="IccProfileTag.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageSharp
+{
+    /// <summary>
+    /// Enumerates the ICC Profile Tags as defined in ICC.1:2010 version 4.3.0.0
+    /// <see href="http://www.color.org/specification/ICC1v43_2010-12.pdf"/> Section 9
+    /// <remarks>
+    /// Each tag value represent the size of the tag in the profile.
+    /// </remarks>
+    /// </summary>
+    public enum IccProfileTag
+    {
+        /// <summary>
+        /// A2B0 - This tag defines a colour transform from Device, Colour Encoding or PCS, to PCS, or a colour transform
+        /// from Device 1 to Device 2, using lookup table tag element structures
+        /// </summary>
+        AToB0 = 0x41324230,
+
+        /// <summary>
+        /// A2B2 - This tag describes the colour transform from Device or Colour Encoding to PCS using lookup table tag element structures
+        /// </summary>
+        AToB1 = 0x41324231,
+
+        /// <summary>
+        /// A2B2 - This tag describes the colour transform from Device or Colour Encoding to PCS using lookup table tag element structures
+        /// </summary>
+        AToB2 = 0x41324232,
+
+        /// <summary>
+        /// bXYZ - This tag contains the third column in the matrix used in matrix/TRC transforms.
+        /// </summary>
+        BlueMatrixColumn = 0x6258595A,
+
+        /// <summary>
+        /// bTRC - This tag contains the blue channel tone reproduction curve. The first element represents no colorant (white) or
+        /// phosphor (black) and the last element represents 100 % colorant (blue) or 100 % phosphor (blue).
+        /// </summary>
+        BlueTRC = 0x62545243,
+
+        /// <summary>
+        /// B2A0 - This tag defines a colour transform from PCS to Device or Colour Encoding using the lookup table tag element structures
+        /// </summary>
+        BToA0 = 0x42324130,
+
+        /// <summary>
+        /// B2A1 - This tag defines a colour transform from PCS to Device or Colour Encoding using the lookup table tag element structures.
+        /// </summary>
+        BToA1 = 0x42324131,
+
+        /// <summary>
+        /// B2A2 - This tag defines a colour transform from PCS to Device or Colour Encoding using the lookup table tag element structures.
+        /// </summary>
+        BToA2 = 0x42324132,
+
+        /// <summary>
+        /// B2D0 - This tag defines a colour transform from PCS to Device. It supports float32Number-encoded input range, output range and transform, and
+        /// provides a means to override the BToA0 tag.
+        /// </summary>
+        BToD0 = 0x42324430,
+
+        /// <summary>
+        /// B2D1 - This tag defines a colour transform from PCS to Device. It supports float32Number-encoded input range, output range and transform, and
+        /// provides a means to override the BToA1 tag.
+        /// </summary>
+        BToD1 = 0x42324431,
+
+        /// <summary>
+        /// B2D2 - This tag defines a colour transform from PCS to Device. It supports float32Number-encoded input range, output range and transform, and
+        /// provides a means to override the BToA2 tag.
+        /// </summary>
+        BToD2 = 0x42324432,
+
+        /// <summary>
+        /// B2D3 - This tag defines a colour transform from PCS to Device. It supports float32Number-encoded input range, output range and transform, and
+        /// provides a means to override the BToA1 tag.
+        /// </summary>
+        BToD3 = 0x42324433,
+
+        /// <summary>
+        /// calt - This tag contains the profile calibration date and time. This allows applications and utilities to verify if this profile matches a
+        /// vendor's profile and how recently calibration has been performed.
+        /// </summary>
+        CalibrationDateTime = 0x63616C74,
+
+        /// <summary>
+        /// targ - This tag contains the name of the registered characterization data set, or it contains the measurement
+        /// data for a characterization target.
+        /// </summary>
+        CharTarget = 0x74617267,
+
+        /// <summary>
+        /// chad - This tag contains a matrix, which shall be invertible, and which converts an nCIEXYZ colour, measured using the actual illumination
+        /// conditions and relative to the actual adopted white, to an nCIEXYZ colour relative to the PCS adopted white
+        /// </summary>
+        ChromaticAdaptation = 0x63686164,
+
+        /// <summary>
+        /// chrm - This tag contains the type and the data of the phosphor/colorant chromaticity set used.
+        /// </summary>
+        Chromaticity = 0x6368726D,
+
+        /// <summary>
+        /// clro - This tag specifies the laydown order of colorants.
+        /// </summary>
+        ColorantOrder = 0x636C726F,
+
+        /// <summary>
+        /// clrt
+        /// </summary>
+        ColorantTable = 0x636C7274,
+
+        /// <summary>
+        /// clot - This tag identifies the colorants used in the profile by a unique name and set of PCSXYZ or PCSLAB values.
+        /// When used in DeviceLink profiles only the PCSLAB values shall be permitted.
+        /// </summary>
+        ColorantTableOut = 0x636C6F74,
+
+        /// <summary>
+        /// ciis - This tag indicates the image state of PCS colorimetry produced using the colorimetric intent transforms.
+        /// </summary>
+        ColorimetricIntentImageStat = 0x63696973,
+
+        /// <summary>
+        /// cprt - This tag contains the text copyright information for the profile.
+        /// </summary>
+        Copyright = 0x63707274,
+
+        /// <summary>
+        /// crdi  - Removed in V4
+        /// </summary>
+        CrdInfo = 0x63726469,
+
+        /// <summary>
+        /// data - Removed in V4
+        /// </summary>
+        Data = 0x64617461,
+
+        /// <summary>
+        /// dtim - Removed in V4
+        /// </summary>
+        DateTime = 0x6474696D,
+
+        /// <summary>
+        /// dmnd - This tag describes the structure containing invariant and localizable
+        /// versions of the device manufacturer for display
+        /// </summary>
+        DeviceMfgDesc = 0x646D6E64,
+
+        /// <summary>
+        /// dmdd - This tag describes the structure containing invariant and localizable
+        /// versions of the device model for display.
+        /// </summary>
+        DeviceModelDesc = 0x646D6464,
+
+        /// <summary>
+        /// devs - Removed in V4
+        /// </summary>
+        DeviceSettings = 0x64657673,
+
+        /// <summary>
+        /// D2B0 - This tag defines a colour transform from Device to PCS. It supports float32Number-encoded 
+        /// input range, output range and transform, and provides a means to override the AToB0 tag
+        /// </summary>
+        DToB0 = 0x44324230,
+
+        /// <summary>
+        /// D2B1 - This tag defines a colour transform from Device to PCS. It supports float32Number-encoded 
+        /// input range, output range and transform, and provides a means to override the AToB1 tag
+        /// </summary>
+        DToB1 = 0x44324230,
+
+        /// <summary>
+        /// D2B2 - This tag defines a colour transform from Device to PCS. It supports float32Number-encoded 
+        /// input range, output range and transform, and provides a means to override the AToB1 tag
+        /// </summary>
+        DToB2 = 0x44324230,
+
+        /// <summary>
+        /// D2B3 - This tag defines a colour transform from Device to PCS. It supports float32Number-encoded 
+        /// input range, output range and transform, and provides a means to override the AToB1 tag
+        /// </summary>
+        DToB3 = 0x44324230,
+
+        /// <summary>
+        /// gamt - This tag provides a table in which PCS values are the input and a single 
+        /// output value for each input value is the output. If the output value is 0, the PCS colour is in-gamut. 
+        /// If the output is non-zero, the PCS colour is out-of-gamut
+        /// </summary>
+        Gamut = 0x67616D74,
+
+        /// <summary>
+        /// kTRC - This tag contains the grey tone reproduction curve. The tone reproduction curve provides the necessary
+        /// information to convert between a single device channel and the PCSXYZ or PCSLAB encoding.
+        /// </summary>
+        GrayTRC = 0x6b545243,
+
+        /// <summary>
+        /// gXYZ - This tag contains the second column in the matrix, which is used in matrix/TRC transforms.
+        /// </summary>
+        GreenMatrixColumn = 0x6758595A,
+
+        /// <summary>
+        /// gTRC - This tag contains the green channel tone reproduction curve. The first element represents no 
+        /// colorant (white) or phosphor (black) and the last element represents 100 % colorant (green) or 100 % phosphor (green). 
+        /// </summary>
+        GreenTRC = 0x67545243,
+
+        /// <summary>
+        /// lumi - This tag contains the absolute luminance of emissive devices in candelas per square metre as described by the Y channel. 
+        /// </summary>
+        Luminance = 0x6C756d69,
+
+        /// <summary>
+        /// meas - This tag describes the alternative measurement specification, such as a D65 illuminant instead of the default D50. 
+        /// </summary>
+        Measurement = 0x6D656173,
+
+        /// <summary>
+        /// bkpt - Removed in V4
+        /// </summary>
+        MediaBlackPoint = 0x626B7074,
+
+        /// <summary>
+        /// wtpt - This tag, which is used for generating the ICC-absolute colorimetric intent, specifies the chromatically
+        /// adapted nCIEXYZ tristimulus values of the media white point.
+        /// </summary>
+        MediaWhitePoint = 0x77747074,
+
+        /// <summary>
+        /// ncol - OBSOLETE, use ncl2
+        /// </summary>
+        NamedColor = 0x6E636f6C,
+
+        /// <summary>
+        /// ncl2 - This tag contains the named colour information providing a PCS and optional device representation
+        /// for a list of named colours. 
+        /// </summary>
+        NamedColor2 = 0x6E636C32,
+
+        /// <summary>
+        /// resp - This tag describes the structure containing a description of the device response for which the profile is intended. 
+        /// </summary>
+        OutputResponse = 0x72657370,
+
+        /// <summary>
+        /// rig0 - There is only one standard reference medium gamut, as defined in ISO 12640-3
+        /// </summary>
+        PerceptualRenderingIntentGamut = 0x72696730,  /* 'rig0' */
+
+        /// <summary>
+        /// pre0 - This tag contains the preview transformation from PCS to device space and back to the PCS.
+        /// </summary>
+        Preview0 = 0x70726530,
+
+        /// <summary>
+        /// pre1 - This tag defines the preview transformation from PCS to device space and back to the PCS.
+        /// </summary>
+        Preview1 = 0x70726531,
+
+        /// <summary>
+        /// pre2 - This tag contains the preview transformation from PCS to device space and back to the PCS.
+        /// </summary>
+        Preview2 = 0x70726532,
+
+        /// <summary>
+        /// desc - This tag describes the structure containing invariant and localizable versions of the profile
+        /// description for display.
+        /// </summary>
+        ProfileDescription = 0x64657363,
+
+        /// <summary>
+        /// pseq - This tag describes the structure containing a description of the profile sequence from source to
+        /// destination, typically used with the DeviceLink profile.
+        /// </summary>
+        ProfileSequenceDesc = 0x70736571,
+
+        /// <summary>
+        /// psd0 - Removed in V4
+        /// </summary>
+        Ps2CRD0 = 0x70736430,
+
+        /// <summary>
+        /// psd1 - Removed in V4
+        /// </summary>
+        Ps2CRD1 = 0x70736431,
+
+        /// <summary>
+        /// psd2 - Removed in V4
+        /// </summary>
+        Ps2CRD2 = 0x70736432,
+
+        /// <summary>
+        /// psd3 - Removed in V4
+        /// </summary>
+        Ps2CRD3 = 0x70736433,
+
+        /// <summary>
+        /// ps2s - Removed in V4
+        /// </summary>
+        Ps2CSA = 0x70733273,
+
+        /// <summary>
+        /// psd2i- Removed in V4
+        /// </summary>
+        Ps2RenderingIntent = 0x70733269,
+
+        /// <summary>
+        /// rXYZ - This tag contains the first column in the matrix, which is used in matrix/TRC transforms. 
+        /// </summary>
+        RedMatrixColumn = 0x7258595A,
+
+        /// <summary>
+        /// This tag contains the red channel tone reproduction curve. The first element represents no colorant
+        /// (white) or phosphor (black) and the last element represents 100 % colorant (red) or 100 % phosphor (red).
+        /// </summary>
+        RedTRC = 0x72545243,
+
+        /// <summary>
+        /// rig2 - There is only one standard reference medium gamut, as defined in ISO 12640-3.
+        /// </summary>
+        SaturationRenderingIntentGamut = 0x72696732,
+
+        /// <summary>
+        /// scrd - Removed in V4
+        /// </summary>
+        ScreeningDesc = 0x73637264,
+
+        /// <summary>
+        /// scrn - Removed in V4
+        /// </summary>
+        Screening = 0x7363726E,
+
+        /// <summary>
+        /// tech - The device technology signature
+        /// </summary>
+        Technology = 0x74656368,
+
+        /// <summary>
+        /// bfd - Removed in V4
+        /// </summary>
+        UcrBg = 0x62666420,
+
+        /// <summary>
+        /// vued - This tag describes the structure containing invariant and localizable 
+        /// versions of the viewing conditions. 
+        /// </summary>
+        ViewingCondDesc = 0x76756564,
+
+        /// <summary>
+        /// view - This tag defines the viewing conditions parameters
+        /// </summary>
+        ViewingConditions = 0x76696577,
+    }
+}