Package com.datalogics.PDFL

Enum Class SmoothFlags

java.lang.Object
java.lang.Enum<SmoothFlags>
com.datalogics.PDFL.SmoothFlags
All Implemented Interfaces:
Serializable, Comparable<SmoothFlags>, Constable
public enum SmoothFlags extends Enum<SmoothFlags>

  • Enum Constant Details

    • NONE

      public static final SmoothFlags NONE
      Do not smooth any drawn elements

    • TEXT

      public static final SmoothFlags TEXT
      Draw smooth text. This will cause text to be antialiased when drawn. Recommended for lower-resolution applications such as on-screen viewing at low zoom levels. Equivalent to the Smooth Text: for Monitor option in PDF Viewer rendering preferences.

    • LINE_ART

      public static final SmoothFlags LINE_ART
      Draw smooth line art. This will cause paths (vector line art elements) to be antialiased. Recommended for lower-resolution applications such as on-screen viewing at low zoom levels.

    • IMAGE

      public static final SmoothFlags IMAGE
      Draw smooth image. This will cause raster images to be resampled to match the target imaging resolution using an averaged subsampling algorithm, and will cause images to be antialiased when drawn. Recommended for general PDF viewing applications.

    • IMAGE_BICUBIC_RESAMPLE_AND_ANTI_ALIAS

      public static final SmoothFlags IMAGE_BICUBIC_RESAMPLE_AND_ANTI_ALIAS
      Enhanced image smoothing controls: Draw smooth image and resample using bicubic resampling. This will cause raster images to be resampled to match the target imaging resolution using a bicubic subsampling algorithm, and will cause images to be antialiased when drawn. Recommended for general imaging applications. Rendering with this option takes longer than with the Image smoothing option, but generates higher quality output.

    • IMAGE_BICUBIC_RESAMPLE

      public static final SmoothFlags IMAGE_BICUBIC_RESAMPLE
      Resample images using bicubic resampling, but do not antialias images. This will cause raster images to be resampled to match the target imaging resolution using a bicubic subsampling algorithm. Recommended for conversion of PDF pages to high-resolution (>= 300dpi) images. Rendering with this option takes longer than with the ImageLinearResample smoothing option, but generates higher quality output.

    • IMAGE_LINEAR_RESAMPLE

      public static final SmoothFlags IMAGE_LINEAR_RESAMPLE
      Resample images using linear average subsampling, but do not antialias images. This will cause raster images to be resampled to match the target imaging resolution using a linear average subsampling algorithm. Recommended for conversion of PDF pages to high-resolution (>= 300dpi) images. Rendering with this option is faster than with the ImageBicubicResample smoothing option, but generates lower quality output.

    • IMAGE_ANTI_ALIAS_ONLY

      public static final SmoothFlags IMAGE_ANTI_ALIAS_ONLY
      Antialias (smooth) images at low resolutions, but do not resample images when they do not match the target imaging resolution.

      This is not recommended for most callers.

    • TEXT_ANTI_ALIAS_ENABLE_DDR

      public static final SmoothFlags TEXT_ANTI_ALIAS_ENABLE_DDR
      Enhanced text antialiasing controls: Antialias (smooth) text using the DDR sub-pixel antialiasing algorithm. Equivalent to the Smooth Text: for Laptop/LCD Screen option in PDF Viewer rendering preferences. Recommended for zoom factors of 150% or more.

    • TEXT_ANTI_ALIAS_ENABLE_PREVIEW

      public static final SmoothFlags TEXT_ANTI_ALIAS_ENABLE_PREVIEW
      Enable special text "preview" rendering and antialiasing for better visual results when generating images at lower resolutions intended for on-screen viewing. This prevents text from looking badly kerned or looking to have poor inter-character spacing.

      We recommend this for use for viewing applications at zoom levels of 150% or less, though you will want to experiment and decide for yourself.

      Do not use this for non-viewing applications. Do not scale up or down the rendered image that is generated from drawing a page using this flag - it will look very blurry and unfocused.

  • Method Details

    • values

      public static SmoothFlags[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared

    • valueOf

      public static SmoothFlags valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum class has no constant with the specified name
      NullPointerException - if the argument is null