System and method for performing scale and bias operations by preclamping input image data
AssigneeSun Microsystems, Inc.
InventorsRanjit S. Oberoi, Michael G. Lavelle, Anthony S. Ramirez
Life of this patent
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Abstract
In one embodiment, a scale and bias unit for use in a graphics system includes a preclamping unit configured to receive an input and to responsively generate an output value equal to a first value if the input is within a first input range. The scale and bias unit also includes a processing unit coupled to the preclamping unit and configured to perform a calculation on the input to generate the output value. The processing unit does not perform the calculation if the input is within the first input range.
Claims20
A method of operating a graphics system, wherein the method comprises:
- receiving an input;
- performing a scale and bias operation on the input to generate an output value, wherein said performing the scale and bias operation comprises:
- if the input is within a first range of inputs:
- inhibiting performance of a calculation on the input to generate the output value;
- and
- generating the output value equal to a first output value associated with the first range of inputs;
- and
- if the input is not within the first range of inputs, performing the calculation on the input to generate the output value.
A scale and bias unit for use in a graphics system, the scale and bias unit comprising:
- a preclamping unit configured to receive an input and to responsively generate an output value equal to a first value if the input is within a first input range;
- and
- a processing unit coupled to the preclamping unit and configured to perform a calculation on the input to generate the output value, wherein the processing unit does not perform the calculation if the input is within the first input range.
Dependencies are inferred from the claim text.