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rssx" Halfplement alpha-to-coverage AA transparency

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kd-11 2018-03-07 23:09:38 +03:00
parent 2dce55d036
commit f00d9a7c7f
3 changed files with 84 additions and 21 deletions
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28
rpcs3/Emu/RSX/RSXThread.cpp
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@ -543,8 +543,11 @@ namespace rsx
performance_counters.FIFO_idle_timestamp = get_system_time();
performance_counters.FIFO_is_idle = true;
}
else
{
do_internal_task();
}
do_internal_task();
continue;
}
@ -950,11 +953,28 @@ namespace rsx
void thread::fill_fragment_state_buffer(void *buffer, const RSXFragmentProgram &fragment_program)
{
const u32 is_alpha_tested = rsx::method_registers.alpha_test_enabled();
const f32 alpha_ref = rsx::method_registers.alpha_ref() / 255.f;
//TODO: Properly support alpha-to-coverage and alpha-to-one behavior in shaders
auto fragment_alpha_func = rsx::method_registers.alpha_func();
auto alpha_ref = rsx::method_registers.alpha_ref() / 255.f;
auto is_alpha_tested = (u32)rsx::method_registers.alpha_test_enabled();
if (rsx::method_registers.msaa_alpha_to_coverage_enabled() && !is_alpha_tested)
{
if (rsx::method_registers.msaa_enabled() &&
rsx::method_registers.surface_antialias() != rsx::surface_antialiasing::center_1_sample)
{
//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
fragment_alpha_func = rsx::comparison_function::greater;
alpha_ref = rsx::method_registers.msaa_sample_mask()? 0.25f : 0.f;
is_alpha_tested |= (1 << 4);
}
}
const f32 fog0 = rsx::method_registers.fog_params_0();
const f32 fog1 = rsx::method_registers.fog_params_1();
const u32 alpha_func = static_cast<u32>(rsx::method_registers.alpha_func());
const u32 alpha_func = static_cast<u32>(fragment_alpha_func);
const u32 fog_mode = static_cast<u32>(rsx::method_registers.fog_equation());
// Generate wpos coeffecients