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st/nine: Implement TEXDEPTH

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Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Axel Davy <axel.davy@ens.fr>
Cc: "10.4" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Axel Davy 2014-12-28 14:38:25 +01:00 • committed by Emil Velikov
parent 3676ab02fb
commit f19e699368
1 changed files with 22 additions and 1 deletions
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23
src/gallium/state_trackers/nine/nine_shader.c
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@ -2314,7 +2314,28 @@ DECL_SPECIAL(TEXM3x3)
DECL_SPECIAL(TEXDEPTH)
{
STUB(D3DERR_INVALIDCALL);
struct ureg_program *ureg = tx->ureg;
struct ureg_dst r5;
struct ureg_src r5r, r5g;
assert(tx->insn.dst[0].idx == 5); /* instruction must get r5 here */
/* we must replace the depth by r5.g == 0 ? 1.0f : r5.r/r5.g.
* r5 won't be used afterward, thus we can use r5.ba */
r5 = tx->regs.r[5];
r5r = ureg_scalar(ureg_src(r5), TGSI_SWIZZLE_X);
r5g = ureg_scalar(ureg_src(r5), TGSI_SWIZZLE_Y);
ureg_RCP(ureg, ureg_writemask(r5, TGSI_WRITEMASK_Z), r5g);
ureg_MUL(ureg, ureg_writemask(r5, TGSI_WRITEMASK_X), r5r, ureg_scalar(ureg_src(r5), TGSI_SWIZZLE_Z));
/* r5.r = r/g */
ureg_CMP(ureg, ureg_writemask(r5, TGSI_WRITEMASK_X), ureg_negate(ureg_abs(r5g)),
r5r, ureg_imm1f(ureg, 1.0f));
/* replace the depth for depth testing with the result */
tx->regs.oDepth = ureg_DECL_output_masked(ureg, TGSI_SEMANTIC_POSITION, 0, TGSI_WRITEMASK_Z);
ureg_MOV(ureg, tx->regs.oDepth, r5r);
return D3D_OK;
}
DECL_SPECIAL(BEM)