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rsx: Improve early-Z disablement mechanism

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kd-11 2025-12-17 11:11:46 +03:00 committed by kd-11
parent 5a809c5f72
commit fd3ecea21e
3 changed files with 10 additions and 14 deletions
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11
rpcs3/Emu/RSX/GL/GLFragmentProgram.cpp
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@ -335,15 +335,12 @@ void GLFragmentDecompilerThread::insertMainEnd(std::stringstream & OS)
OS << "\n" << " fs_main();\n\n";
if ((m_prog.ctrl & RSX_SHADER_CONTROL_DISABLE_EARLY_Z) &&
!(m_prog.ctrl & (CELL_GCM_SHADER_CONTROL_DEPTH_EXPORT | RSX_SHADER_CONTROL_META_USES_DISCARD)) &&
g_cfg.video.shader_precision != gpu_preset_level::low)
if (m_prog.ctrl & RSX_SHADER_CONTROL_DISABLE_EARLY_Z)
{
// This is effectively unreachable code, but good enough to trick the GPU to skip early Z
// This is effectively pointless code, but good enough to trick the GPU to skip early Z
OS <<
"// Insert NOP sequence to disable early-Z\n"
"if (isnan(gl_FragCoord.z))\n"
" discard;\n\n";
" // Insert pseudo-barrier sequence to disable early-Z\n"
" gl_FragDepth = gl_FragCoord.z;\n\n";
}
glsl::insert_rop(OS, m_shader_props);

2
rpcs3/Emu/RSX/RSXThread.cpp
View file

@ -2242,6 +2242,8 @@ namespace rsx
}
if (sampler_descriptors[i]->is_cyclic_reference &&
!(current_fragment_program.ctrl & (CELL_GCM_SHADER_CONTROL_DEPTH_EXPORT | RSX_SHADER_CONTROL_META_USES_DISCARD)) &&
!g_cfg.video.strict_rendering_mode &&
g_cfg.video.shader_precision != gpu_preset_level::low)
{
current_fragment_program.ctrl |= RSX_SHADER_CONTROL_DISABLE_EARLY_Z;

11
rpcs3/Emu/RSX/VK/VKFragmentProgram.cpp
View file

@ -471,16 +471,13 @@ void VKFragmentDecompilerThread::insertMainEnd(std::stringstream & OS)
OS << "\n" << " fs_main();\n\n";
if ((m_prog.ctrl & RSX_SHADER_CONTROL_DISABLE_EARLY_Z) &&
!(m_prog.ctrl & (CELL_GCM_SHADER_CONTROL_DEPTH_EXPORT | RSX_SHADER_CONTROL_META_USES_DISCARD)) &&
g_cfg.video.shader_precision != gpu_preset_level::low)
if (m_prog.ctrl & RSX_SHADER_CONTROL_DISABLE_EARLY_Z)
{
// This is effectively unreachable code, but good enough to trick the GPU to skip early Z
// For vulkan, depth export has stronger semantics than discard.
OS <<
"// Insert NOP sequence to disable early-Z\n"
" const uint rop_control = fs_contexts[_fs_context_offset].rop_control;\n"
" if (_test_bit(rop_control, 0))\n"
" discard;\n\n";
" // Insert pseudo-barrier sequence to disable early-Z\n"
" gl_FragDepth = gl_FragCoord.z;\n\n";
}
glsl::insert_rop(OS, m_shader_props);