Rate controlled image and texture data compression

A system comprising:

• one or more non-transitory computer-readable storage media including instructions;
• and
• one or more processors coupled to the storage media, the one or more processors configured to execute the instructions to:
• determine a bit depth for encoding one or more color components of a pixel region in an image, the one or more color components having a color range;
• determine a quantization range having a first quantization endpoint and a second quantization endpoint by:
• while fixing the second quantization endpoint to an initial value determined based on the color range, select one of a plurality of first candidate values for the first quantization endpoint based on a plurality of corresponding first quantization errors;
• and
• while fixing the first quantization endpoint to the selected first candidate value, select one of a plurality of second candidate values for the second quantization endpoint based on a plurality of corresponding second quantization errors;
• define quantization levels corresponding to the bit depth using the quantization range defined by the first quantization endpoint and the second quantization endpoint;
• and
• encode the one or more color components of the pixel region using the quantization levels.

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a computing system, cause the one or more processors to:

• determine a bit depth for encoding one or more color components of a pixel region in an image, the one or more color components having a color range;
• determine a quantization range having a first quantization endpoint and a second quantization endpoint by:
• while fixing the second quantization endpoint to an initial value determined based on the color range, select one of a plurality of first candidate values for the first quantization endpoint based on a plurality of corresponding first quantization errors;
• and
• while fixing the first quantization endpoint to the selected first candidate value, select one of a plurality of second candidate values for the second quantization endpoint based on a plurality of corresponding second quantization errors;
• define quantization levels corresponding to the bit depth using the quantization range defined by the first quantization endpoint and the second quantization endpoint;
• and
• encode the one or more color components of the pixel region using the quantization levels.