DPI compensation effect
Use the DPI compensation effect to automatically adjust an input bitmap to match the DPI of the context. This is useful for situations where a bitmap is created or loaded at a different DPI than the screen.
The CLSID for this effect is CLSID_D2D1DpiCompensation.
|Display name and index enumeration||Description|
The interpolation mode the effect uses to scale the image.
The type is D2D1_DPICOMPENSATION_INTERPOLATION_MODE.
The default value is D2D1_DPICOMPENSATION_INTERPOLATION_MODE_LINEAR .
The mode used to calculate the border of the image, soft or hard. See Border modes for more info.
The type is D2D1_BORDER_MODE.
The default value is D2D1_BORDER_MODE_SOFT.
The DPI of the input image.
The type is FLOAT.
The default value is 96.0f.
|D2D1_DPICOMPENSATION_INTERPOLATION_MODE_NEAREST_NEIGHBOR||Samples the nearest single point and uses that. This mode uses less processing time, but outputs the lowest quality image.|
|D2D1_DPICOMPENSATION_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_DPICOMPENSATION_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_DPICOMPENSATION_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_DPICOMPENSATION_INTERPOLATION_MODE_ANISOTROPIC||Uses anisotropic filtering to sample a pattern according to the transformed shape of the bitmap.|
|D2D1_DPICOMPENSATION_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.|
Pixels outside of the input boundaries are generated by the mirror border effect.
Pixels outside of the input boundaries are transparent black.
|Minimum supported client||Windows 8 and Platform Update for Windows 7 [desktop apps | Windows Store apps]|
|Minimum supported server||Windows 8 and Platform Update for Windows 7 [desktop apps | Windows Store apps]|