D2D1_DISTANTDIFFUSE_SCALE_MODE enumeration

The interpolation mode the effect uses to scale the image to the corresponding kernel unit length. There are six scale modes that range in quality and speed.

Syntax


typedef enum D2D1_DISTANTDIFFUSE_SCALE_MODE { 
  D2D1_DISTANTDIFFUSE_SCALE_MODE_NEAREST_NEIGHBOR     = 0,
  D2D1_DISTANTDIFFUSE_SCALE_MODE_LINEAR               = 1,
  D2D1_DISTANTDIFFUSE_SCALE_MODE_CUBIC                = 2,
  D2D1_DISTANTDIFFUSE_SCALE_MODE_MULTI_SAMPLE_LINEAR  = 3,
  D2D1_DISTANTDIFFUSE_SCALE_MODE_ANISOTROPIC          = 4,
  D2D1_DISTANTDIFFUSE_SCALE_MODE_HIGH_QUALITY_CUBIC   = 5
} D2D1_DISTANTDIFFUSE_SCALE_MODE;

Constants

D2D1_DISTANTDIFFUSE_SCALE_MODE_NEAREST_NEIGHBOR

Samples the nearest single point and uses that. This mode uses less processing time, but outputs the lowest quality image.

D2D1_DISTANTDIFFUSE_SCALE_MODE_LINEAR

Uses a four point sample and linear interpolation. This mode outputs a higher quality image than nearest neighbor.

D2D1_DISTANTDIFFUSE_SCALE_MODE_CUBIC

Uses a 16 sample cubic kernel for interpolation. This mode uses the most processing time, but outputs a higher quality image.

D2D1_DISTANTDIFFUSE_SCALE_MODE_MULTI_SAMPLE_LINEAR

Uses 4 linear samples within a single pixel for good edge anti-aliasing. This mode is good for scaling down by small amounts on images with few pixels.

D2D1_DISTANTDIFFUSE_SCALE_MODE_ANISOTROPIC

Uses anisotropic filtering to sample a pattern according to the transformed shape of the bitmap.

D2D1_DISTANTDIFFUSE_SCALE_MODE_HIGH_QUALITY_CUBIC

Uses a variable size high quality cubic kernel to perform a pre-downscale the image if downscaling is involved in the transform matrix. Then uses the cubic interpolation mode for the final output.

Requirements

Header

D2d1effects.h

 

 

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