Graphics processing systems and graphics processors

A non-transitory computer-readable storage medium comprising computer-executable instructions which, when executed by a processor, cause a computing device to operate a graphics processing system, the graphics processing system comprising a graphics processing pipeline comprising a primitive generation stage and a pixel processing stage, operating the graphics processing system comprising:

• processing input data in the primitive generation stage to produce first primitive data associated with a first view of a scene and second primitive data associated with a second view of the scene;
• processing the first primitive data in the pixel processing stage to produce first pixel-processed data associated with the first view;
• determining, for second pixel-processed data associated with the second view, whether to use the first pixel-processed data as the second pixel-processed data or whether to process the second primitive data in the pixel processing stage to produce the second pixel-processed data, wherein the determining is based on one or more geometric properties of the first primitive data and/or one or more geometric properties of the second primitive data, and wherein the one or more geometric properties include a predetermined parallax property;
• identifying that the first primitive data and the second primitive data have the predetermined parallax property in response to determining that one or more offsets between one or more positions of one or more vertices of one or more primitives in the first primitive data and one or more positions of one or more corresponding vertices of one or more corresponding primitives in the second primitive data do not exceed one or more predetermined offset thresholds;
• and
• performing additional processing in the graphics processing pipeline based on the determining.

A graphics processing system comprising a graphics processing pipeline, the graphics processing pipeline comprising a primitive generation stage and a pixel processing stage, the graphics processing system being arranged to:

• process input data in the primitive generation stage to produce first primitive data associated with a first view of a scene and second primitive data associated with a second view of the scene;
• process the first primitive data in the pixel processing stage to produce first pixel-processed data associated with the first view;
• determine, for second pixel-processed data associated with the second view, whether to use the first pixel-processed data as the second pixel-processed data or whether to process the second primitive data in the pixel processing stage to produce the second pixel-processed data, wherein the determination is based on one or more geometric properties of the first primitive data and/or one or more geometric properties of the second primitive data, and wherein the one or more geometric properties include a predetermined parallax property;
• identifying that the first primitive data and the second primitive data have the predetermined parallax property in response to determined that one or more offsets between one or more positions of one or more vertices of one or more primitives in the first primitive data and one or more positions of one or more corresponding vertices of one or more corresponding primitives in the second primitive data do not exceed one or more predetermined offset thresholds;
• and
• perform additional processing in the graphics processing pipeline based on the determining.