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llvmpipe: choose correct position for multisample 

For multisample we don't want pixel centers at this stage,
so don't add them in for that case.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4122>
This commit is contained in:
Dave Airlie 2020-03-21 07:36:35 +10:00 committed by Marge Bot
parent b72f504e99
commit 8297513aa9
1 changed files with 8 additions and 7 deletions
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15
src/gallium/drivers/llvmpipe/lp_setup_tri.c
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@ -1028,6 +1028,7 @@ calc_fixed_position(struct lp_setup_context *setup,
const float (*v1)[4],
const float (*v2)[4])
{
float pixel_offset = setup->multisample ? 0.0 : setup->pixel_offset;
/*
* The rounding may not be quite the same with PIPE_ARCH_SSE
* (util_iround right now only does nearest/even on x87,
@ -1039,7 +1040,7 @@ calc_fixed_position(struct lp_setup_context *setup,
__m128 vxy0xy2, vxy1xy0;
__m128i vxy0xy2i, vxy1xy0i;
__m128i dxdy0120, x0x2y0y2, x1x0y1y0, x0120, y0120;
__m128 pix_offset = _mm_set1_ps(setup->pixel_offset);
__m128 pix_offset = _mm_set1_ps(pixel_offset);
__m128 fixed_one = _mm_set1_ps((float)FIXED_ONE);
v0r = _mm_castpd_ps(_mm_load_sd((double *)v0[0]));
vxy0xy2 = _mm_loadh_pi(v0r, (__m64 *)v2[0]);
@ -1065,14 +1066,14 @@ calc_fixed_position(struct lp_setup_context *setup,
_mm_store_si128((__m128i *)&position->y[0], y0120);
#else
position->x[0] = subpixel_snap(v0[0][0] - setup->pixel_offset);
position->x[1] = subpixel_snap(v1[0][0] - setup->pixel_offset);
position->x[2] = subpixel_snap(v2[0][0] - setup->pixel_offset);
position->x[0] = subpixel_snap(v0[0][0] - pixel_offset);
position->x[1] = subpixel_snap(v1[0][0] - pixel_offset);
position->x[2] = subpixel_snap(v2[0][0] - pixel_offset);
position->x[3] = 0; // should be unused
position->y[0] = subpixel_snap(v0[0][1] - setup->pixel_offset);
position->y[1] = subpixel_snap(v1[0][1] - setup->pixel_offset);
position->y[2] = subpixel_snap(v2[0][1] - setup->pixel_offset);
position->y[0] = subpixel_snap(v0[0][1] - pixel_offset);
position->y[1] = subpixel_snap(v1[0][1] - pixel_offset);
position->y[2] = subpixel_snap(v2[0][1] - pixel_offset);
position->y[3] = 0; // should be unused
position->dx01 = position->x[0] - position->x[1];