US 2025/0095234 A1 · ANISOTROPIC TEXTURE FILTERING USING ADAPTIVE FILTER KERNEL

Abstract

A texture filtering unit applies anisotropic filtering using a filter kernel which can be adapted to apply different amounts of anisotropy up to a maximum amount of anisotropy. If it is determined that a received input amount of anisotropy is not above the maximum amount of anisotropy, the filter kernel applies the input amount of anisotropy, and texels of a texture are sampled using the filter kernel to determine a filtered texture value. If it is determined that the input amount of anisotropy is above the maximum amount of anisotropy, the filter kernel applies an amount of anisotropy that is not above the maximum amount of anisotropy, a plurality of sampling operations are performed to sample texels of the texture using the filter kernel to determine a respective plurality of intermediate filtered texture values, and the plurality of intermediate filtered texture values are combined to determine a filtered texture value which has been filtered in accordance with the input amount of anisotropy and the input direction of anisotropy.

Claims20

Dependent claims

A method of applying anisotropic texture filtering to a texture using a texture filtering unit, the method comprising:

determining whether an input amount of anisotropy is above a maximum amount of anisotropy;
if it is determined that the input amount of anisotropy is not above the maximum amount of anisotropy, performing a sampling operation to sample texels of the texture to determine a filtered texture value which has been filtered in accordance with the input amount of anisotropy;
and
if it is determined that the input amount of anisotropy is above the maximum amount of anisotropy:
performing a plurality of sampling operations to sample texels of the texture to determine a respective plurality of intermediate filtered texture values;
and
combining the plurality of intermediate filtered texture values to determine a filtered texture value which has been filtered in accordance with the input amount of anisotropy.

4 more elements

A texture filtering unit configured to apply anisotropic texture filtering to a texture, the texture filtering unit being configured to:

determine whether an input amount of anisotropy is above a maximum amount of anisotropy;
if it is determined that the input amount of anisotropy is not above the maximum amount of anisotropy, perform a sampling operation to sample texels of the texture to determine a filtered texture value which has been filtered in accordance with the input amount of anisotropy;
and
if it is determined that the input amount of anisotropy is above the maximum amount of anisotropy:
perform a plurality of sampling operations to sample texels of the texture to determine a respective plurality of intermediate filtered texture values;
and
combine the plurality of intermediate filtered texture values to determine a filtered texture value which has been filtered in accordance with the input amount of anisotropy.

4 more elements

Dependencies are inferred from the claim text.

Anisotropic texture filtering using adaptive filter kernel

Life of this patent

Anisotropic texture filtering using adaptive filter kernel

Life of this patent

Abstract

Claims20