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rsx: Enable fallback for devices without wide integer Z buffers

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kd-11 2021-12-20 21:33:45 +03:00 • committed by kd-11
parent 1ce5349199
commit de495952fd
4 changed files with 15 additions and 1 deletions
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13
rpcs3/Emu/RSX/Program/GLSLCommon.cpp
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@ -603,6 +603,17 @@ namespace glsl
{
if (props.emulate_depth_clip_only)
{
// Optionally quantize Z values. This doesn't work fully since fragment interpolation will add back intermediate values...
// But it helps make the values closer to the correct integral counterparts
if (!props.quantize_depth_values) [[likely]]
{
OS << "#define _quantize_z(value) (value)\n\n";
}
else
{
OS << "#define _quantize_z(value) (double(uint(value * 0xFFFFFFu)) / 16777215.0)\n\n";
}
// Technically the depth value here is the 'final' depth that should be stored in the Z buffer.
// Forward mapping eqn is d' = d * (f - n) + n, where d' is the stored Z value (this) and d is the normalized API value.
OS <<
@ -615,7 +626,7 @@ namespace glsl
" const double depth_range = double(real_f - real_n);\n"
" const double inv_range = (depth_range > 0.0) ? (1.0 / (depth_range * pos.w)) : 0.0;\n"
" const double d = (double(pos.z) - real_n) * inv_range;\n"
" return vec4(pos.xy, float(d * pos.w), pos.w);\n"
" return vec4(pos.xy, float(_quantize_z(d) * pos.w), pos.w);\n"
" }\n"
" else\n"
" {\n"