namespace provides advanced GDI+ imaging functionality. Basic graphics functionality is provided by the
Metafile class provides methods for recording and saving metafiles. The Encoder class enables users to extend GDI+ to support any image format. The PropertyItem class provides methods for storing and retrieving metadata in image files.
Classes within the
System.Drawing.Imaging namespace are not supported for use within a Windows or ASP.NET service. Attempting to use these classes from within one of these application types may produce unexpected problems, such as diminished service performance and run-time exceptions.
Class Description BitmapData Specifies the attributes of a bitmap image. The BitmapData class is used by the LockBits and UnlockBits methods of the Bitmap class. Not inheritable. ColorMap Defines a map for converting colors. Several methods of the ImageAttributes class adjust image colors by using a color-remap table, which is an array of ColorMap structures. Not inheritable. ColorMatrix Defines a 5 x 5 matrix that contains the coordinates for the RGBA space. Several methods of the ImageAttributes class adjust image colors by using a color matrix. This class cannot be inherited. ColorPalette Defines an array of colors that make up a color palette. The colors are 32-bit ARGB colors. Not inheritable. Encoder An Encoder object encapsulates a globally unique identifier (GUID) that identifies the category of an image encoder parameter. EncoderParameter Used to pass a value, or an array of values, to an image encoder. EncoderParameters Encapsulates an array of EncoderParameter objects. FrameDimension Provides properties that get the frame dimensions of an image. Not inheritable. ImageAttributes An ImageAttributes object contains information about how bitmap and metafile colors are manipulated during rendering. An ImageAttributes object maintains several color-adjustment settings, including color-adjustment matrices, grayscale-adjustment matrices, gamma-correction values, color-map tables, and color-threshold values. During rendering, colors can be corrected, darkened, lightened, and removed. To apply such manipulations, initialize an ImageAttributes object and pass the path of that ImageAttributes object (along with the path of an Image) to the DrawImage method. ImageCodecInfo The ImageCodecInfo class provides the necessary storage members and methods to retrieve all pertinent information about the installed image encoders and decoders (called codecs). Not inheritable. ImageFormat Specifies the file format of the image. Not inheritable. Metafile Defines a graphic metafile. A metafile contains records that describe a sequence of graphics operations that can be recorded (constructed) and played back (displayed). This class is not inheritable. MetafileHeader Contains attributes of an associated Metafile. Not inheritable. MetaHeader Contains information about a windows-format (WMF) metafile. PropertyItem Encapsulates a metadata property to be included in an image file. Not inheritable. WmfPlaceableFileHeader Defines a placeable metafile. Not inheritable.
Enumeration Description ColorAdjustType Specifies which GDI+ objects use color adjustment information. ColorChannelFlag Specifies individual channels in the CMYK (cyan, magenta, yellow, black) color space. This enumeration is used by the SetOutputChannel methods. ColorMapType Specifies the types of color maps. ColorMatrixFlag Specifies the types of images and colors that will be affected by the color and grayscale adjustment settings of an ImageAttributes. ColorMode Specifies two modes for color component values. EmfPlusRecordType Specifies the methods available for use with a metafile to read and write graphic commands. The members of this enumeration come in three groups: EmfType Specifies the nature of the records that are placed in an Enhanced Metafile (EMF) file. This enumeration is used by several constructors in the Metafile class. EncoderParameterValueType Used to specify the data type of the EncoderParameter used with the Save or SaveAdd method of an image. EncoderValue Used to specify the parameter value passed to a JPEG or TIFF image encoder when using the Image.Save or Image.SaveAdd methods. ImageCodecFlags Provides attributes of an image encoder/decoder (codec). ImageFlags Specifies the attributes of the pixel data contained in an Image object. The Flags property returns a member of this enumeration. ImageLockMode Specifies flags that are passed to the flags parameter of the LockBits method. The LockBits method locks a portion of an image so that you can read or write the pixel data. MetafileFrameUnit Specifies the unit of measurement for the rectangle used to size and position a metafile. This is specified during the creation of the Metafile object. MetafileType Specifies types of metafiles. The MetafileHeader.Type property returns a member of this enumeration. PaletteFlags Specifies the type of color data in the system palette. The data can be color data with alpha, grayscale data only, or halftone data. PixelFormat Specifies the format of the color data for each pixel in the image.