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[GPU] More specific note about slope-scaled depth bias

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Triang3l 2021-06-06 18:32:58 +03:00
parent dce6938827
commit c4a5048e62
1 changed files with 2 additions and 0 deletions
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src/xenia/gpu/register_table.inc
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@ -423,6 +423,8 @@ XE_GPU_REGISTER(0x2325, kDword, RB_SAMPLE_COUNT_ADDR)
// Polygon offset scales and offsets are 32-bit floating-point. // Polygon offset scales and offsets are 32-bit floating-point.
// "slope computed in subpixels (1/12 or 1/16)" - R5xx Acceleration. // "slope computed in subpixels (1/12 or 1/16)" - R5xx Acceleration.
// But the correct scale for conversion of the slope scale (FRONT_BACK/SCALE)
// from subpixels to pixels is likely 1/16 according to:
// https://github.com/mesa3d/mesa/blob/54ad9b444c8e73da498211870e785239ad3ff1aa/src/gallium/drivers/radeonsi/si_state.c#L946 // https://github.com/mesa3d/mesa/blob/54ad9b444c8e73da498211870e785239ad3ff1aa/src/gallium/drivers/radeonsi/si_state.c#L946
XE_GPU_REGISTER(0x2380, kFloat, PA_SU_POLY_OFFSET_FRONT_SCALE) XE_GPU_REGISTER(0x2380, kFloat, PA_SU_POLY_OFFSET_FRONT_SCALE)
XE_GPU_REGISTER(0x2381, kFloat, PA_SU_POLY_OFFSET_FRONT_OFFSET) XE_GPU_REGISTER(0x2381, kFloat, PA_SU_POLY_OFFSET_FRONT_OFFSET)