[Bug 107212] Dual-Core CPU E5500 / G45: RetroArch with reicast core results in corrupted graphics

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107212

--- Comment #27 from Diego Viola <diego.viola at gmail.com> ---
Hi, after some investigation we have concluded that removing these two
gl_FragDepth lines:

https://github.com/libretro/reicast-emulator/blob/2d411a166d8fa4a4cc5f0cb23c3f60537774333d/core/rend/gles/gles.cpp#L271

and:

https://github.com/libretro/reicast-emulator/blob/2d411a166d8fa4a4cc5f0cb23c3f60537774333d/core/rend/gles/gles.cpp#L291

And replacing this line:

https://github.com/libretro/reicast-emulator/blob/2d411a166d8fa4a4cc5f0cb23c3f60537774333d/core/rend/gles/gles.cpp#L107

    vpos.z = vpos.w; \n"

with:

    vpos.z = (1 - 0.002*vpos.w) * vpos.w; \n"

Gives me proper in-game graphics.

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