diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c | 53 |
1 files changed, 30 insertions, 23 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c index b0207820ba..f3c4b6a7c8 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c @@ -288,30 +288,37 @@ lp_build_sample_wrap_linear(struct lp_build_sample_context *bld, break; case PIPE_TEX_WRAP_CLAMP_TO_EDGE: - if (bld->static_state->normalized_coords) { - /* clamp to [0,1] */ - coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, coord_bld->one); - /* mul by tex size and subtract 0.5 */ - coord = lp_build_mul(coord_bld, coord, length_f); - coord = lp_build_sub(coord_bld, coord, half); - } - /* XXX this is odd normalized ranges from -0.5 to length-0.5 after denorm - but non-normalized ranges from to 0.5 to length-0.5 after clamp */ - else { - LLVMValueRef min, max; - /* clamp to [0.5, length - 0.5] */ - min = half; - max = lp_build_sub(coord_bld, length_f, min); - coord = lp_build_clamp(coord_bld, coord, min, max); + { + struct lp_build_context abs_coord_bld = bld->coord_bld; + abs_coord_bld.type.sign = FALSE; + + if (bld->static_state->normalized_coords) { + /* mul by tex size */ + coord = lp_build_mul(coord_bld, coord, length_f); + /* clamp to length max */ + coord = lp_build_min(coord_bld, coord, length_f); + /* subtract 0.5 */ + coord = lp_build_sub(coord_bld, coord, half); + /* clamp to [0, length - 0.5] */ + coord = lp_build_max(coord_bld, coord, coord_bld->zero); + } + /* XXX this is odd normalized ranges from 0 to length-0.5 after denorm + but non-normalized ranges from to 0.5 to length-0.5 after clamp. + Is this missing the sub 0.5? */ + else { + LLVMValueRef min, max; + /* clamp to [0.5, length - 0.5] */ + min = half; + max = lp_build_sub(coord_bld, length_f, min); + coord = lp_build_clamp(coord_bld, coord, min, max); + } + /* convert to int, compute lerp weight */ + lp_build_ifloor_fract(&abs_coord_bld, coord, &coord0, &weight); + coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); + /* coord1 = min(coord1, length-1) */ + coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one); + break; } - /* convert to int, compute lerp weight */ - lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight); - coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); - /* coord0 = max(coord0, 0) */ - coord0 = lp_build_max(int_coord_bld, coord0, int_coord_bld->zero); - /* coord1 = min(coord1, length-1) */ - coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one); - break; case PIPE_TEX_WRAP_CLAMP_TO_BORDER: { |