ImageGear .NET v25.2 - Updated
Developer Guide / File Formats and Compressions / File Formats / File Formats Reference / HPGL
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    HPGL
    In This Topic
    Full Name Hewlett Packard Graphics Language
    Format ID ImGearFormats.HPGL
    File Extension(s) *.hpgl
    Data Type Vector image
    Data Encoding Binary
    Multi-Page Support Yes
    Alpha Channel Support No
    Metadata Update Support No
    ImageGear Platforms Support Win32, Win64, .NET, .NET64
    HPGL format requires ImageGear.Formats.HPGL Namespace.

    ImageGear Supported Versions

    HPGL, HPGL/2

    ImageGear Supported Features

    ImageGear Read Support

    ImGearCompressions.NONE - Vector/CAD data

    ImageGear Write Support

    No

    ImageGear Filter Control Parameters

    Filter Control Parameter Type Default Value Available Values Description
    BackColor Long 0 Any positive value This parameter is used to set background color. If nBackGroundColor=0, then a black background color is set, otherwise a white background color is set.
    Width Long 512 Any positive value Defines the DIB width of the loaded image. The DIB height is calculated using the file's scale factors.

    Comments

    HPGL ("Hewlett Packard Graphics Language") is a vector graphics language used to output vector/CAD drawings to plotters. Due to widespread support among CAD software, it is sometimes used as a vector/CAD interchange format.

    HPGL Features Supported for Reading

    HPGL Instruction

    Supported Attributes

    Imported into ImageGear as:

    BR (Bezier relative)

    Relative points

    ImGearVectEntities.NURBS_CURVE entity.

    BZ (Bezier absolute)

    Absolute points

    ImGearVectEntities.BEZIER_CURVE entity.

    DF (Default)

     

    Used internally. Resets the settings to their default values.

    DI (Absolute direction)

    X coordinate of arc tangent

    Y coordinate of arc tangent

    Defines a direction for ImGearVectEntities.TEXT entity.

    DR (Relative direction)

    X coordinate of arc tangent

    Y coordinate of arc tangent

    Defines a direction for ImGearVectEntities.TEXT entity.

    DT (Define terminator)

    Terminator

    Used internally. Defines a terminator for text.

    EA (Rectangle absolute)

    Second corner of the rectangle

    ImGearVectEntities.POLYLINE entity.

    EP (Edge polygon)

     

    Appends ImGearVectAttrib.LINETYPEINDEX, ImGearVectAttrib.DRAWCOLOR, and ImGearVectAttrib.THICKNESS attributes to the extended polyline being previously created from PM instruction.

    ER (Rectangle relative)

    Second corner of the rectangle

    ImGearVectEntities.POLYLINE entity.

    FT (fill type)

    Fill pattern

    Fill spacing

    Fill angle

    Used for creating ImGearVectorFilltype object.

    FP (Fill type polygon)

     

    Appends ImGearVectAttrib.FILLTYPEINDEX and ImGearVectAttrib.FILLCOLOR attributes to the extended polyline being previously created from PM instruction.

    IN (Initialize)

     

    Used internally. Initializes the drawing parameters.

    IP (Input P1 and P2)

    Minimum point

    Maximum point

    Used internally for specifying layout, scale factors, and so on.

    SC (Scale)

    Minimum scale point

    Maximum scale point

    Scale mode

    Used internally for specifying layout, scale factors, and so on.

    SI (Absolute character size)

    Width

    Height

    Defines font width and height for ImGearVectEntities.TEXT entities.

    SR (Relative character size)

    Relative width

    Relative height

    Defines font width and height for ImGearVectEntities.TEXT entities.

    SL (Character slant)

    Slant

    Defines character slant for ImGearVectEntities.TEXT entities.

    LB (Label)

    Text string

    ImGearVectEntities.TEXT entity.

    \x1b. (Esc sequence)

     

    Used internally.

    PA (Plot absolute)

    Absolute position

    Defines a position of entities.

    If pen is down, then either new ImGearVectEntities.POLYLINE entity or new region for ImGearVectEntities.POLYLINEEX is created.

    PC (Palette entry)

    Entry number

    Red, Green, Blue color values

    Used internally for specifying colors.

    PR (Plot relative)

    Relative position

    Defines a position of entities.

    If pen is down, then either new ImGearVectEntities.POLYLINE entity or new region for ImGearVectEntities.POLYLINEEX is created.

    RA (Shade rectangle absolute)

    Second corner

    ImGearVectEntities.POLYLINE entity.

    RR (Fill rectangle absolute)

    Second corner

    ImGearVectEntities.POLYLINE entity.

    AA (Arc absolute)

    Center

    Angle (Starting from the current position)

    Vertexes with bulge attribute being set if the arc is added to the polygon, otherwise - ImGearVectEntities.ARC entity.

    PG (New page)

     

    Used for navigation through the pages.

    AF (New plot)

     

    Used for navigation through the pages.

    AR (Arc relative)

    Offset of the center

    Angle

    ImGearVectEntities.ARC entity.

    AT (Arc absolute three points)

    Second point

    Third point

    ImGearVectEntities.ARC entity.

    CI (Circle)

    Radius

    ImGearVectEntities.ELLIPSE entity.

    CP (Character plot)

    Spaces

    Lines

    Used for updating current position for ImGearVectEntities.TEXT entity.

    EW (Edge wedge)

    Radius

    Start angle

    Sweep angle

    ImGearVectEntities.ARC entity.

    LT (Line type)

    Line style

    Line pattern length

    Used for creating ImGearVectorLinetype objects.

    PD (Pen down)

    X position

    Y position

    Either ImGearVectEntities.POLYLINE entity or new region for the existing ImGearVectEntities.POLYLINEEX entity.

    PE (Polyline encoding)

    Binary sequence

    ImGearVectEntities.POLYLINE entity.

    PM (Polygon mode)

    Mode (new polygon or close)

    ImGearVectEntities.POLYLINEEX entity.

    PU (Pen up)

    X position

    Y position

    Changes current position. For polygons, appends hidden vertices to the vertex container.

    PW (Pen width)

    Thickness

    Defines line thickness when creating ImGearVectAttrib.THICKNESS attribute.

    RO (rotate coordinate system)

    Angle

    Creates new ImGearVectEntities.BLOCK entity with the corresponding rotation.

    SP (Select pen)

    Pen number

    Selects drawing color. Used as ImGearVectAttrib.DRAWCOLOR attribute.

    TL (tick length)

    Length positive

    Length negative

    Used for creating coordinate axes – see below.

    WG (Shade wedge)

    Radius

    Start angle

    Sweep angle

     

    ImGearVectEntities.ARC entity.

    WU (Pen width units)

    Unit type (Plot units or mm)

    Used for creating ImGearVectAttrib.THICKNESS attribute.

    XT (X Tick, that is, X axe)

     

    ImGearVectEntities.EASYLINE entity.

    YT (Y Tick, that is, Y axe)

     

    ImGearVectEntities.EASYLINE entity.