Crate ispc_downsampler

Structs

• Image
  Describes a source image which can be used for downsample() The pixel data is stored as a slice to avoid unnecessarily cloning it.

Enums

• Format
• NormalMapFormat

Functions

• downsample
  Samples the provided image down to the specified width and height. target_width and target_height are expected to be less than or equal to their src counter parts. Will panic if the target dimensions are the same as the source image’s.
• downsample_normal_map
  Downsamples an image that is meant to be used as a normal map. Uses a box filter instead of a lanczos filter, and normalizes each pixel to preserve unit length for the normals after downsampling.
• downsample_with_custom_scale
  Version of downsample which allows for a custom filter scale, thus trading between speed and final image quality.
• scale_alpha_to_original_coverage
  Scales the alpha to the downscaled texture to preserve the overall alpha coverage.