A 3D graphics processor with clip-free graphics pipeline
Traditional 3D graphics processors rely on clipping operations to determine the visible area of triangles.How-ever,clipping operations introduce latency,high hardware overhead,and can negatively impact performance when dealing with a large number of clipping operations.This paper presents the design of a 3D graphics processor with a unified rendering architecture based on the OpenGL ES 2.0 specification.This proposed graphics processor incor-porates an efficient clip-free graphics pipeline architecture,effectively eliminating the hardware overhead and per-formance loss associated with clipping.Furthermore,an IEEE-754 compliant 3D vector inner product unit is intro-duced into the fixed function pipeline of the proposed processor,enhancing performance and eliminating errors in floating-point multiplication and addition operations during graphics rendering,improving the robustness of the graphics rendering.The implemented 3D graphics processor achieves a processing capacity of 500 M vertices and 8 G texels per second,consuming 1 000 mW of power.Utilizing a 28 nm process with an area of 7.92 mm2,the proposed implementation demonstrates a 27.8％improvement in the performance-to-power ratio compared with pre-vious work.
3D graphics processorgraphics pipelineclippingvector inner product
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