D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE enumeration (d2d1effects.h)

The interpolation mode to be used with the 2D affine transform effect to scale the image. There are 6 scale modes that range in quality and speed.

Syntax

typedef enum D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE {
  D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_NEAREST_NEIGHBOR = 0,
  D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_LINEAR = 1,
  D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_CUBIC = 2,
  D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_MULTI_SAMPLE_LINEAR = 3,
  D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_ANISOTROPIC = 4,
  D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_HIGH_QUALITY_CUBIC = 5,
  D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_FORCE_DWORD = 0xffffffff
} ;

Constants

D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_NEAREST_NEIGHBOR Value: 0 Samples the nearest single point and uses that. This mode uses less processing time, but outputs the lowest quality image.
D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_LINEAR Value: 1 Uses a four point sample and linear interpolation. This mode uses more processing time than the nearest neighbor mode, but outputs a higher quality image.
D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_CUBIC Value: 2 Uses a 16 sample cubic kernel for interpolation. This mode uses the most processing time, but outputs a higher quality image.
D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_MULTI_SAMPLE_LINEAR Value: 3 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_2DAFFINETRANSFORM_INTERPOLATION_MODE_ANISOTROPIC Value: 4 Uses anisotropic filtering to sample a pattern according to the transformed shape of the bitmap.
D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_HIGH_QUALITY_CUBIC Value: 5 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.
D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE_FORCE_DWORD Value: 0xffffffff

Requirements

Requirement	Value
Header	d2d1effects.h