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nv2a: Use rounded values for alpha testing

This commit is contained in:
Erik Abair 2025-03-05 10:10:14 -08:00 committed by mborgerson
parent 203b33ecf0
commit f701573d44
3 changed files with 10 additions and 9 deletions
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6
hw/xbox/nv2a/pgraph/gl/shaders.c
View File

@ -712,9 +712,9 @@ static void shader_update_constants(PGRAPHState *pg, ShaderBinding *binding,
}
}
if (binding->alpha_ref_loc != -1) {
float alpha_ref = GET_MASK(pgraph_reg_r(pg, NV_PGRAPH_CONTROL_0),
NV_PGRAPH_CONTROL_0_ALPHAREF) / 255.0;
glUniform1f(binding->alpha_ref_loc, alpha_ref);
int alpha_ref = GET_MASK(pgraph_reg_r(pg, NV_PGRAPH_CONTROL_0),
NV_PGRAPH_CONTROL_0_ALPHAREF);
glUniform1i(binding->alpha_ref_loc, alpha_ref);
}

6
hw/xbox/nv2a/pgraph/glsl/psh.c
View File

@ -743,7 +743,7 @@ static MString* psh_convert(struct PixelShader *ps)
"layout(location = 0) out vec4 fragColor;\n");
}
mstring_append_fmt(preflight, "%sfloat alphaRef;\n"
mstring_append_fmt(preflight, "%sint alphaRef;\n"
"%svec4 fogColor;\n"
"%sivec4 clipRegion[8];\n",
u, u, u);
@ -1190,7 +1190,9 @@ static MString* psh_convert(struct PixelShader *ps)
assert(false);
break;
}
mstring_append_fmt(ps->code, "if (!(fragColor.a %s alphaRef)) discard;\n",
mstring_append_fmt(ps->code,
"int fragAlpha = int(round(fragColor.a * 255.0));\n"
"if (!(fragAlpha %s alphaRef)) discard;\n",
alpha_op);
}
}

7
hw/xbox/nv2a/pgraph/vk/shaders.c
View File

@ -477,10 +477,9 @@ static void shader_update_constants(PGRAPHState *pg, ShaderBinding *binding,
}
}
if (binding->alpha_ref_loc != -1) {
float alpha_ref = GET_MASK(pgraph_reg_r(pg, NV_PGRAPH_CONTROL_0),
NV_PGRAPH_CONTROL_0_ALPHAREF) /
255.0;
uniform1f(&binding->fragment->uniforms, binding->alpha_ref_loc,
int alpha_ref = GET_MASK(pgraph_reg_r(pg, NV_PGRAPH_CONTROL_0),
NV_PGRAPH_CONTROL_0_ALPHAREF);
uniform1i(&binding->fragment->uniforms, binding->alpha_ref_loc,
alpha_ref);
}