Reducing AR power consumption via bounding sparse content

A method of graphics processing, comprising:

• obtaining, for a frame of graphics content, a first indication of at least one of:
• the frame, a graphics processor tracked active pixel region associated with the frame, tile tracking compression metadata of the frame, or render associated tiles of the frame;
• computing a first sum of first pixel values for each row of pixels in the frame;
• identifying, based on the computed first sum of the first pixel values for each row of pixels in the frame, a first row of pixels of the frame and a second row of pixels of the frame that have a first non-zero sum, wherein each row of pixels between the first row of pixels and the second row of pixels has a third non-zero sum;
• computing a second sum of second pixel values for each column of pixels in the frame;
• identifying, based on the computed second sum of the second pixel values for each column of pixels in the frame, a first column of pixels of the frame and a second column of pixels of the frame that have a second non-zero sum, wherein each column of pixels between the first column of pixels and the second column of pixels has a fourth non-zero sum;
• computing, based on the first indication, a set of bounding areas for a set of active pixels of the frame based on the identified first row, the identified second row, the identified first column, and the identified second column;
• configuring a workload for at least one of a composition or a reprojection on the computed set of bounding areas for the set of active pixels of the frame;
• and
• outputting a second indication of the configured workload for at least one of the composition or the reprojection on the computed set of bounding areas for the set of active pixels of the frame.

A non-transitory computer-readable medium storing computer executable code, the computer executable code, when executed by a processor, causes the processor to:

• obtain, for a frame of graphics content, a first indication of at least one of:
• the frame, a graphics processor tracked active pixel region associated with the frame, tile tracking compression metadata of the frame, or render associated tiles of the frame;
• compute a first sum of first pixel values for each row of pixels in the frame;
• identify, based on the computed first sum of the first pixel values for each row of pixels in the frame, a first row of pixels of the frame and a second row of pixels of the frame that have a first non-zero sum, wherein each row of pixels between the first row of pixels and the second row of pixels has a third non-zero sum;
• compute a second sum of second pixel values for each column of pixels in the frame;
• identify, based on the computed second sum of the second pixel values for each column of pixels in the frame, a first column of pixels of the frame and a second column of pixels of the frame that have a second non-zero sum, wherein each column of pixels between the first column of pixels and the second column of pixels has a fourth non-zero sum;
• compute, based on the first indication, a set of bounding areas for a set of active pixels of the frame based on the identified first row, the identified second row, the identified first column, and the identified second column;
• configure a workload for at least one of a composition or a reprojection on the computed set of bounding areas for the set of active pixels of the frame;
• and
• output a second indication of the configured workload for at least one of the composition or the reprojection on the computed set of bounding areas for the set of active pixels of the frame.