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D2D1_2DAFFINETRANSFORM_INTERPOLATION_MODE enumeration (d2d1effects.h)

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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