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DX12: enable alpha kill (#2158)

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This commit is contained in:
raven02 2016-09-26 18:38:52 +08:00 • committed by GitHub
parent fcb853792d
commit 38f35df7b6
1 changed files with 41 additions and 19 deletions
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60
rpcs3/Emu/RSX/D3D12/D3D12FragmentProgramDecompiler.cpp
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@ -172,6 +172,21 @@ namespace
return;
}
}
std::string insert_texture_fetch(const RSXFragmentProgram& prog, int index)
{
std::string tex_name = "tex" + std::to_string(index) + ".Sample";
std::string sampler_name = "tex" + std::to_string(index) + "sampler";
std::string coord_name = "In.tc" + std::to_string(index);
switch (prog.get_texture_dimension(index))
{
case rsx::texture_dimension_extended::texture_dimension_1d: return " " + tex_name + " (" + sampler_name + ", " + coord_name + ".x) ";
case rsx::texture_dimension_extended::texture_dimension_2d: return " " + tex_name + " (" + sampler_name + ", " + coord_name + ".xy) ";
case rsx::texture_dimension_extended::texture_dimension_3d:
case rsx::texture_dimension_extended::texture_dimension_cubemap: return " " + tex_name + " (" + sampler_name + ", " + coord_name + ".xyz) ";
}
}
}
void D3D12FragmentDecompiler::insertMainStart(std::stringstream & OS)
@ -296,27 +311,34 @@ void D3D12FragmentDecompiler::insertMainEnd(std::stringstream & OS)
// Shaders don't always output colors (for instance if they write to depth only)
if (!first_output_name.empty())
{
switch (m_prog.alpha_func)
auto make_comparison_test = [](rsx::comparison_function compare_func, const std::string &test, const std::string &a, const std::string &b) -> std::string
{
case rsx::comparison_function::equal:
OS << " if (isAlphaTested && Out." << first_output_name << ".a != alphaRef) discard;\n";
break;
case rsx::comparison_function::not_equal:
OS << " if (isAlphaTested && Out." << first_output_name << ".a == alphaRef) discard;\n";
break;
case rsx::comparison_function::less_or_equal:
OS << " if (isAlphaTested && Out." << first_output_name << ".a > alphaRef) discard;\n";
break;
case rsx::comparison_function::less:
OS << " if (isAlphaTested && Out." << first_output_name << ".a >= alphaRef) discard;\n";
break;
case rsx::comparison_function::greater:
OS << " if (isAlphaTested && Out." << first_output_name << ".a <= alphaRef) discard;\n";
break;
case rsx::comparison_function::greater_or_equal:
OS << " if (isAlphaTested && Out." << first_output_name << ".a < alphaRef) discard;\n";
break;
std::string compare;
switch (compare_func)
{
case rsx::comparison_function::equal: compare = " == "; break;
case rsx::comparison_function::not_equal: compare = " != "; break;
case rsx::comparison_function::less_or_equal: compare = " <= "; break;
case rsx::comparison_function::less: compare = " < "; break;
case rsx::comparison_function::greater: compare = " > "; break;
case rsx::comparison_function::greater_or_equal: compare = " >= "; break;
default:
return "";
}
return " if (" + test + "!(" + a + compare + b + ")) discard;\n";
};
for (u8 index = 0; index < 16; ++index)
{
if (m_prog.textures_alpha_kill[index])
{
std::string fetch_texture = insert_texture_fetch(m_prog, index) + ".a";
OS << make_comparison_test((rsx::comparison_function)m_prog.textures_zfunc[index], "", "0", fetch_texture);
}
}
OS << make_comparison_test(m_prog.alpha_func, "isAlphaTested && ", "Out." + first_output_name + ".a", "alphaRef");
}
OS << " return Out;" << std::endl;