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Processing order of vertices and fragments in arm gpu

When the ARM GPU processes vertices and fragments, in what order are they distributed and processed? Vertices are in index order? What about fragment? Can we try to control the order of the index on the cpu side to improve the efficiency of the GPU?

For example: Does the optimization of the link below improve the gpu of arm? If there is an improvement, what features of the GPUs they use? github.com/.../meshoptimizer

Top replies

Peter Harris over 4 years ago +2 verified

Hi Shawn, Older Mali GPUs (Utgard, Midgard) render vertices in incrementing index order, between min and max referenced index, ignoring the actual order in the index buffer. Newer Mali GPUs (Bifrost...
Peter Harris over 4 years ago in reply to Shawn Chang +2 verified

In relatively new GPUs, calculations are done in the order of indexbuff. The vertices shared by multiple triangles may be calculated multiple times. Yes, may be shaded multiple times but there is post...
Peter Harris over 4 years ago in reply to Shawn Chang +1 verified

Mali is tile-based, so effectively fragment order is scrambled - it doesn't correspond to the draw sequence in any way (except within a pixel, where layering must respect blending, of course). HTH, ...