diff options
Diffstat (limited to 'src/intel/blorp/blorp_blit.c')
| -rw-r--r-- | src/intel/blorp/blorp_blit.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/intel/blorp/blorp_blit.c b/src/intel/blorp/blorp_blit.c index c85ec8543a9..e811cb0be37 100644 --- a/src/intel/blorp/blorp_blit.c +++ b/src/intel/blorp/blorp_blit.c @@ -776,6 +776,14 @@ blorp_nir_manual_blend_bilinear(nir_builder *b, nir_ssa_def *pos, * grid of samples with in a pixel. Sample number layout shows the * rectangular grid of samples roughly corresponding to the real sample * locations with in a pixel. + * + * In the case of 2x MSAA, the layout of sample indices is reversed from + * the layout of sample numbers: + * + * sample index layout : --------- sample number layout : --------- + * | 0 | 1 | | 1 | 0 | + * --------- --------- + * * In case of 4x MSAA, layout of sample indices matches the layout of * sample numbers: * --------- @@ -819,7 +827,9 @@ blorp_nir_manual_blend_bilinear(nir_builder *b, nir_ssa_def *pos, key->x_scale * key->y_scale)); sample = nir_f2i32(b, sample); - if (tex_samples == 8) { + if (tex_samples == 2) { + sample = nir_isub(b, nir_imm_int(b, 1), sample); + } else if (tex_samples == 8) { sample = nir_iand(b, nir_ishr(b, nir_imm_int(b, 0x64210573), nir_ishl(b, sample, nir_imm_int(b, 2))), nir_imm_int(b, 0xf)); |