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rsx: Support CSAA transparency without multiple rasterization samples enabled

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kd-11 2019-07-18 20:15:19 +03:00 • committed by kd-11
parent 79ddf55937
commit e2574ff100
5 changed files with 34 additions and 13 deletions
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19
rpcs3/Emu/RSX/RSXThread.cpp
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@ -691,19 +691,28 @@ namespace rsx
auto alpha_ref = rsx::method_registers.alpha_ref() / 255.f;
auto rop_control = rsx::method_registers.alpha_test_enabled()? 1u : 0u;
if (rsx::method_registers.msaa_alpha_to_coverage_enabled() &&
rsx::method_registers.surface_antialias() != rsx::surface_antialiasing::center_1_sample &&
g_cfg.video.antialiasing_level == msaa_level::none)
if (rsx::method_registers.msaa_alpha_to_coverage_enabled() && !supports_hw_a2c)
{
// Alpha values generate a coverage mask for order independent blending
// Requires hardware AA to work properly (or just fragment sample stage in fragment shaders)
// Simulated using combined alpha blend and alpha test
const u32 mask_bit = rsx::method_registers.msaa_sample_mask() ? 1u : 0u;
const u32 samples_bit = rsx::method_registers.surface_antialias() != rsx::surface_antialiasing::diagonal_centered_2_samples ? 1u : 0u;
rop_control |= (1u << 4); // CSAA enable bit
rop_control |= (mask_bit << 5); // MSAA mask enable bit
rop_control |= (samples_bit << 6); // Sample configuration bit
// Sample configuration bits
switch (rsx::method_registers.surface_antialias())
{
case rsx::surface_antialiasing::center_1_sample:
break;
case rsx::surface_antialiasing::diagonal_centered_2_samples:
rop_control |= 1u << 6;
break;
default:
rop_control |= 3u << 6;
break;
}
}
const f32 fog0 = rsx::method_registers.fog_params_0();