Feature that reduces overdraw

[Meumef25ra]

Is there an existing issue for this?

• I have searched the existing issues

What feature are you suggesting?

I looked at lime3ds emulator on arm's streamline, and it shows that each pixel on citra has an overdraw factor of 8 threads. Extremely high late Ztests and lateZ kill rates. That greatly reduces performance on lower end devices. If possible of course it would help a lot if azahar-emu could reduce the overdraw.💜

Why would this feature be useful?

Reduce power consumption on all devices and potentially improve performance on low end devices

[raphaelthegreat]

The lateZ tests are probably because all fragment shaders write to gl_FragDepth to apply depth scale and offset which disables earlyZ. It may be possible to use VkViewport to handle the transform.