Dali 3D User Interface Engine
Enumerations | Variables
Dali::SamplingMode Namespace Reference

Filtering options, used when resizing images to sample original pixels. More...

Enumerations

enum  Type {
  BOX, NEAREST, LINEAR, BOX_THEN_NEAREST,
  BOX_THEN_LINEAR, NO_FILTER, DONT_CARE
}
 

Variables

const Type DEFAULT = BOX
 TOP_LEFT. More...
 

Detailed Description

Filtering options, used when resizing images to sample original pixels.

A SamplingMode controls how pixels in an input image are sampled and combined to generate each pixel of a destination image during a scaling.

NoFilter and Box modes do not guarantee that the output pixel array exactly matches the rectangle specified by the desired dimensions and FittingMode, but all other filter modes do if the desired dimensions are <= the raw dimensions of the input image file. .0

Enumeration Type Documentation

Enumerator
BOX 
       Iteratively box filter to generate an image of 1/2, 1/4, @SINCE_1_0.0

1/8, etc width and height and approximately the desired size.

This is the default.

NEAREST 

For each output pixel, read one input pixel. .0.

LINEAR 
 For each output pixel, read a quad of four input pixels @SINCE_1_0.0

and write a weighted average of them.

BOX_THEN_NEAREST 

Iteratively box filter to generate an image of 1/2, 1/4, .0 1/8 etc width and height and approximately the desired size, then for each output pixel, read one pixel from the last level of box filtering.

BOX_THEN_LINEAR 

Iteratively box filter to almost the right size, then for .0 each output pixel, read four pixels from the last level of box filtering and write their weighted average.

NO_FILTER 

No filtering is performed.

If the SCALE_TO_FILL scaling mode .0 is enabled, the borders of the image may be trimmed to match the aspect ratio of the desired dimensions.

DONT_CARE 

For caching algorithms where a client strongly prefers a .0 cache-hit to reuse a cached image.

Definition at line 83 of file image-operations.h.

Variable Documentation

const Type Dali::SamplingMode::DEFAULT = BOX
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