diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_fs.cpp')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 7329f309f0..2c997b4eb3 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -2140,6 +2140,17 @@ fs_visitor::emit_fb_writes() } if (c->key.nr_color_regions == 0) { + if (c->key.alpha_test && (this->frag_color || this->frag_data)) { + /* If the alpha test is enabled but there's no color buffer, + * we still need to send alpha out the pipeline to our null + * renderbuffer. + */ + color.reg_offset += 3; + emit(fs_inst(BRW_OPCODE_MOV, + fs_reg(MRF, color_mrf + 3), + color)); + } + fs_inst *inst = emit(fs_inst(FS_OPCODE_FB_WRITE, reg_undef, reg_undef)); inst->base_mrf = 0; |