Z-clipping for primitive samples

A method of graphics processing, comprising:

• obtaining an indication of a set of primitives for a draw call operation;
• identifying a subset of primitives in the set of primitives, wherein each of the subset of primitives include a primitive portion that is outside of a viewing frustum for the draw call operation, and wherein the primitive portion corresponds to less than all of each of the subset of primitives;
• calculating an area of each of the subset of primitives including the primitive portion that is outside of the viewing frustum;
• and
• performing, or refraining from performing, a clipping operation for each of the subset of primitives based on the area of each of the subset of primitives being less than, equal to, or greater than an area threshold, wherein performance or refrainment from performance of the clipping operation is based on a per-draw call basis, and wherein the performance of the clipping operation for each of the subset of primitives is based on the area of each of the subset of primitives being greater than the area threshold on the per-draw call basis.

An apparatus for graphics processing, comprising:

• means for obtaining an indication of a set of primitives for a draw call operation;
• means for identifying a subset of primitives in the set of primitives, wherein each of the subset of primitives include a primitive portion that is outside of a viewing frustum for the draw call operation, and wherein the primitive portion corresponds to less than all of each of the subset of primitives;
• means for calculating an area of each of the subset of primitives including the primitive portion that is outside of the viewing frustum;
• and
• means for performing, or refraining from performing, a clipping operation for each of the subset of primitives based on the area of each of the subset of primitives being less than, equal to, or greater than an area threshold, wherein performance or refrainment from performance of the clipping operation is based on a per-draw call basis, and wherein the performance of the clipping operation for each of the subset of primitives is based on the area of each of the subset of primitives being greater than the area threshold on the per-draw call basis.

A non-transitory computer-readable medium storing computer executable code for graphics processing, the code when executed by at least one processor causes the at least one processor to:

• obtain an indication of a set of primitives for a draw call operation;
• identify a subset of primitives in the set of primitives, wherein each of the subset of primitives include a primitive portion that is outside of a viewing frustum for the draw call operation, and wherein the primitive portion corresponds to less than all of each of the subset of primitives;
• calculate an area of each of the subset of primitives including the primitive portion that is outside of the viewing frustum;
• and
• perform, or refrain from performing, a clipping operation for each of the subset of primitives based on the area of each of the subset of primitives being less than, equal to, or greater than an area threshold, wherein performance or refrainment from performance of the clipping operation is based on a per-draw call basis, and wherein the performance of the clipping operation for each of the subset of primitives is based on the area of each of the subset of primitives being greater than the area threshold on the per-draw call basis.