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rsx: Compensate for nvidia's low precision attribute interpolation

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- The hw generates inaccurate values when doing perspective-correct
  interpolation of vertex output attributes and makes the comparison (a ==
  b) fail even when they are a fixed constant value.
- Increase equality tolerance when doing comparisons in fragment
  shaders for NV cards only to work around this issue.
- Teepo fix
This commit is contained in:
kd-11 2019-04-16 13:50:39 +03:00 • committed by kd-11
parent 463b1b220d
commit 60f3059d22
7 changed files with 120 additions and 37 deletions
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12
rpcs3/Emu/RSX/GL/GLFragmentProgram.cpp
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@ -196,8 +196,16 @@ void GLFragmentDecompilerThread::insertConstants(std::stringstream & OS)
void GLFragmentDecompilerThread::insertGlobalFunctions(std::stringstream &OS)
{
glsl::insert_glsl_legacy_function(OS, glsl::glsl_fragment_program, properties.has_lit_op,
m_prog.redirected_textures != 0, properties.has_wpos_input, properties.has_tex_op, device_props.emulate_depth_compare);
glsl::shader_properties properties2;
properties2.domain = glsl::glsl_fragment_program;
properties2.require_lit_emulation = properties.has_lit_op;
properties2.require_depth_conversion = m_prog.redirected_textures != 0;
properties2.require_wpos = properties.has_wpos_input;
properties2.require_texture_ops = properties.has_tex_op;
properties2.emulate_shadow_compare = device_props.emulate_depth_compare;
properties2.low_precision_tests = ::gl::get_driver_caps().vendor_NVIDIA;
glsl::insert_glsl_legacy_function(OS, properties2);
}
void GLFragmentDecompilerThread::insertMainStart(std::stringstream & OS)