FIXED-SIZE BLOCK COMPRESSION TECHNIQUES FOR RGB CHANNELS
A system and method for fixed size texture compression using a selected encoding scheme is presented. The method includes determining a first endpoint of a four-pixel block, each pixel represented by a red, green, and blue channel; determining a second endpoint of the pixel block; determining a distance between the first endpoint and the second endpoint; selecting an encoding scheme based on a determined distance; encoding the first endpoint and the second endpoint using a first plurality of bits based on the selected encoding scheme; encoding a first quantization level using a second plurality of bits based on the selected encoding scheme; encoding a second quantization level using a third plurality of bits based on the selected encoding scheme; and encoding a location of the first endpoint and a location of the second endpoint using a fourth plurality of bits based on the selected encoding scheme.
1 . A method for fixed size texture compression using a selected encoding scheme, comprising:
determining a first endpoint of a pixel block including four pixels, each pixel represented by a red channel, a green channel and a blue channel;
determining a second endpoint of the pixel block;
determining a distance between a value of the first endpoint and a value of the second endpoint;
selecting an encoding scheme of a plurality of encoding schemes based on a determined distance;
encoding the first endpoint and the second endpoint using a first plurality of bits based on the selected encoding scheme;
encoding a first quantization level using a second plurality of bits based on the selected encoding scheme;
encoding a second quantization level using a third plurality of bits based on the selected encoding scheme; and
encoding a location of the first endpoint and a location of the second endpoint using a fourth plurality of bits based on the selected encoding scheme.
2 . The method of claim 1 , further comprising:
selecting the encoding scheme to encode the first endpoint and the second endpoint using an absolute value encoding scheme.
3 . The method of claim 1 , further comprising:
selecting the encoding scheme to encode the first endpoint and the second endpoint using an offset encoding scheme.
4 . The method of claim 3 , further comprising:
encoding the first endpoint using a group of bits of the first plurality of bits; and
encoding the second endpoint such that each value of a channel of the second endpoint is encoded relative to a value of a corresponding channel of the first endpoint.
5 . The method of claim 1 , further comprising:
encoding the pixel block further to include an indicator, wherein the indicator indicates an identifier of the encoding scheme of the plurality of encoding schemes.
6 . The method of claim 1 , further comprising:
encoding the red channel using a first encoding scheme of the plurality of encoding schemes.
7 . The method of claim 6 , further comprising:
encoding any one of: the blue channel or the green channel, using a second encoding scheme of the plurality of encoding schemes.
8 . The method of claim 1 , further comprising:
encoding a green channel of the first endpoint using a first portion of the first plurality of bits;
encoding a red channel of the first endpoint using a second portion of the first plurality of bits; and
encoding a blue channel of the first endpoint using a third portion of the first plurality of bits, wherein a number of bits of the first portion is greater than a number of bits of each of the second portion and the third portion.
9 . The method of claim 1 , further comprising:
encoding a pixel layout of the pixel block.
10 . A non-transitory computer-readable medium storing a set of instructions for fixed size texture compression using a selected encoding scheme, the set of instructions comprising:
one or more instructions that, when executed by one or more processing circuitries of a device, cause the device to:
determine a first endpoint of a pixel block including four pixels, each pixel represented by a red channel, a green channel and a blue channel;
determine a second endpoint of the pixel block;
determine a distance between a value of the first endpoint and a value of the second endpoint;
select an encoding scheme of a plurality of encoding schemes based on a determined distance;
encode the first endpoint and the second endpoint using a first plurality of bits based on the selected encoding scheme;
encode a first quantization level using a second plurality of bits based on the selected encoding scheme;
encode a second quantization level using a third plurality of bits based on the selected encoding scheme; and
encode a location of the first endpoint and a location of the second endpoint using a fourth plurality of bits based on the selected encoding scheme.
11 . A system for fixed size texture compression using a selected encoding scheme comprising:
one or more processing circuitries configured to:
determine a first endpoint of a pixel block including four pixels, each pixel represented by a red channel, a green channel and a blue channel;
determine a second endpoint of the pixel block;
determine a distance between a value of the first endpoint and a value of the second endpoint;
select an encoding scheme of a plurality of encoding schemes based on a determined distance;
encode the first endpoint and the second endpoint using a first plurality of bits based on the selected encoding scheme;
encode a first quantization level using a second plurality of bits based on the selected encoding scheme;
encode a second quantization level using a third plurality of bits based on the selected encoding scheme; and
encode a location of the first endpoint and a location of the second endpoint using a fourth plurality of bits based on the selected encoding scheme.
12 . The system of claim 11 , wherein the one or more processing circuitries are further configured to:
select the encoding scheme to encode the first endpoint and the second endpoint using an absolute value encoding scheme.
13 . The system of claim 11 , wherein the one or more processing circuitries are further configured to:
select the encoding scheme to encode the first endpoint and the second endpoint using an offset encoding scheme.
14 . The system of claim 13 , wherein the one or more processing circuitries are further configured to:
encode the first endpoint using a group of bits of the first plurality of bits; and
encode the second endpoint such that each value of a channel of the second endpoint is encoded relative to a value of a corresponding channel of the first endpoint.
15 . The system of claim 11 , wherein the one or more processing circuitries are further configured to:
encode the pixel block further to include an indicator, wherein the indicator indicates an identifier of the encoding scheme of the plurality of encoding schemes.
16 . The system of claim 11 , wherein the one or more processing circuitries are further configured to:
encode the red channel using a first encoding scheme of the plurality of encoding schemes.
17 . The system of claim 16 , wherein the one or more processing circuitries are further configured to:
encode any one of: the blue channel or the green channel, use a second encoding scheme of the plurality of encoding schemes.
18 . The system of claim 11 , wherein the one or more processing circuitries are further configured to:
encode a green channel of the first endpoint using a first portion of the first plurality of bits;
encode a red channel of the first endpoint using a second portion of the first plurality of bits; and
encode a blue channel of the first endpoint using a third portion of the first plurality of bits, wherein a number of bits of the first portion is greater than a number of bits of each of the second portion and the third portion.
19 . The system of claim 11 , wherein the one or more processing circuitries are further configured to:
encode a pixel layout of the pixel block; and
encode a pixel layout of the pixel block.