diff options
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 15475fbae2f..9c3180fbc1c 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -463,9 +463,21 @@ fs_visitor::emit_general_interpolation(ir_variable *ir) } else { /* Perspective interpolation case. */ for (unsigned int k = 0; k < type->vector_elements; k++) { - struct brw_reg interp = interp_reg(location, k); - emit(FS_OPCODE_LINTERP, attr, - this->delta_x, this->delta_y, fs_reg(interp)); + /* FINISHME: At some point we probably want to push + * this farther by giving similar treatment to the + * other potentially constant components of the + * attribute, as well as making brw_vs_constval.c + * handle varyings other than gl_TexCoord. + */ + if (location >= FRAG_ATTRIB_TEX0 && + location <= FRAG_ATTRIB_TEX7 && + k == 3 && !(c->key.proj_attrib_mask & (1 << location))) { + emit(BRW_OPCODE_MOV, attr, fs_reg(1.0f)); + } else { + struct brw_reg interp = interp_reg(location, k); + emit(FS_OPCODE_LINTERP, attr, + this->delta_x, this->delta_y, fs_reg(interp)); + } attr.reg_offset++; } |