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gallium: Fix NIR validation when lowering polygon stipple

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The fmul operation takes the maximum number of components from either
of its operands. We only need to use 2 components from the fragment
coordinates.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7507>
This commit is contained in:
Louis-Francis Ratté-Boulianne 2020-07-22 16:21:32 -04:00 • committed by Marge Bot
parent 441feda0bb
commit bcc3d53587
1 changed files with 2 additions and 3 deletions
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5
src/gallium/auxiliary/nir/nir_draw_helpers.c
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@ -71,11 +71,10 @@ nir_lower_pstipple_block(nir_block *block,
b->cursor = nir_before_block(block);
nir_ssa_def *div32 = nir_imm_vec2(b, 1.0/32.0, 1.0/32.0);
nir_ssa_def *frag_coord = state->fs_pos_is_sysval ? nir_load_frag_coord(b) : load_frag_coord(b);
texcoord = nir_fmul(b, frag_coord, div32);
texcoord = nir_fmul(b, nir_channels(b, frag_coord, 0x3),
nir_imm_vec2(b, 1.0/32.0, 1.0/32.0));
nir_tex_instr *tex = nir_tex_instr_create(b->shader, 1);
tex->op = nir_texop_tex;