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nv2a: Fix missing flat qualifier for inv_w param

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`vtx_inv_w` should also be flat, since interpolating it causes incorrect values
for the flat shaded colors.

Fixes #1179

[Test](https://github.com/abaire/nxdk_pgraph_tests/blob/main/src/tests/shade_model_tests.cpp)
[HW results](https://github.com/abaire/nxdk_pgraph_tests_golden_results/wiki/Results-Shade_model)
This commit is contained in:
Erik Abair 2022-07-10 19:59:33 -07:00 committed by mborgerson
parent 4fd15c00f3
commit ae1a140ecb
2 changed files with 2 additions and 2 deletions
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2
hw/xbox/nv2a/shaders.c
View File

@ -262,7 +262,7 @@ static MString* generate_geometry_shader(
"void emit_vertex(int index, int provoking_index) {\n"
" gl_Position = gl_in[index].gl_Position;\n"
" gl_PointSize = gl_in[index].gl_PointSize;\n"
" vtx_inv_w = v_vtx_inv_w[index];\n"
" vtx_inv_w = v_vtx_inv_w[provoking_index];\n"
" vtxD0 = v_vtxD0[provoking_index];\n"
" vtxD1 = v_vtxD1[provoking_index];\n"
" vtxB0 = v_vtxB0[provoking_index];\n"

2
hw/xbox/nv2a/shaders_common.h
View File

@ -24,7 +24,7 @@
#include "debug.h"
#define DEF_VERTEX_DATA(qualifier, in_out, prefix, suffix) \
"noperspective " in_out " float " prefix "vtx_inv_w" suffix ";\n" \
qualifier " " in_out " float " prefix "vtx_inv_w" suffix ";\n" \
qualifier " " in_out " vec4 " prefix "vtxD0" suffix ";\n" \
qualifier " " in_out " vec4 " prefix "vtxD1" suffix ";\n" \
qualifier " " in_out " vec4 " prefix "vtxB0" suffix ";\n" \