diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index aedb5a23f02..551294dd7eb 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -1337,7 +1337,13 @@ fs_visitor::emit_sampleid_setup() const fs_builder abld = bld.annotate("compute sample id"); fs_reg *reg = new(this->mem_ctx) fs_reg(vgrf(glsl_type::int_type)); - if (key->compute_sample_id) { + if (!key->compute_sample_id) { + /* As per GL_ARB_sample_shading specification: + * "When rendering to a non-multisample buffer, or if multisample + * rasterization is disabled, gl_SampleID will always be zero." + */ + abld.MOV(*reg, brw_imm_d(0)); + } else { fs_reg t1(VGRF, alloc.allocate(1), BRW_REGISTER_TYPE_D); t1.set_smear(0); fs_reg t2(VGRF, alloc.allocate(1), BRW_REGISTER_TYPE_W); @@ -1380,12 +1386,6 @@ fs_visitor::emit_sampleid_setup() * width=4, hstride=0 of t2 during an ADD instruction. */ abld.emit(FS_OPCODE_SET_SAMPLE_ID, *reg, t1, t2); - } else { - /* As per GL_ARB_sample_shading specification: - * "When rendering to a non-multisample buffer, or if multisample - * rasterization is disabled, gl_SampleID will always be zero." - */ - abld.MOV(*reg, brw_imm_d(0)); } return reg; |