D2D1_INTERPOLATION_MODE enumeration

This is used to specify the quality of image scaling with ID2D1DeviceContext::DrawImage and with the 2D affine transform effect.

Syntax

typedef enum  { 
  D2D1_INTERPOLATION_MODE_NEAREST_NEIGHBOR,
  D2D1_INTERPOLATION_MODE_LINEAR,
  D2D1_INTERPOLATION_MODE_CUBIC,
  D2D1_INTERPOLATION_MODE_MULTI_SAMPLE_LINEAR,
  D2D1_INTERPOLATION_MODE_ANISOTROPIC,
  D2D1_INTERPOLATION_MODE_HIGH_QUALITY_CUBIC
} D2D1_INTERPOLATION_MODE;

Constants

D2D1_INTERPOLATION_MODE_NEAREST_NEIGHBOR

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

D2D1_INTERPOLATION_MODE_LINEAR

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_INTERPOLATION_MODE_CUBIC

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

D2D1_INTERPOLATION_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_INTERPOLATION_MODE_ANISOTROPIC

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

D2D1_INTERPOLATION_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.

Remarks

Requirements

See also

ID2D1DeviceContext::DrawImage