diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_wm_emit.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_emit.c | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c index f316e0cda4..fa0898c586 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_emit.c +++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c @@ -138,19 +138,43 @@ void emit_wpos_xy(struct brw_wm_compile *c, * X and Y channels. */ if (mask & WRITEMASK_X) { - /* X' = X - origin */ - brw_ADD(p, - dst[0], - retype(arg0[0], BRW_REGISTER_TYPE_W), - brw_imm_d(0 - c->key.origin_x)); + if (c->fp->program.PixelCenterInteger) { + /* X' = X */ + brw_MOV(p, + dst[0], + retype(arg0[0], BRW_REGISTER_TYPE_W)); + } else { + /* X' = X + 0.5 */ + brw_ADD(p, + dst[0], + retype(arg0[0], BRW_REGISTER_TYPE_W), + brw_imm_f(0.5)); + } } if (mask & WRITEMASK_Y) { - /* Y' = height - (Y - origin_y) = height + origin_y - Y */ - brw_ADD(p, - dst[1], - negate(retype(arg0[1], BRW_REGISTER_TYPE_W)), - brw_imm_d(c->key.origin_y + c->key.drawable_height - 1)); + if (c->fp->program.OriginUpperLeft) { + if (c->fp->program.PixelCenterInteger) { + /* Y' = Y */ + brw_MOV(p, + dst[1], + retype(arg0[1], BRW_REGISTER_TYPE_W)); + } else { + /* Y' = Y + 0.5 */ + brw_ADD(p, + dst[1], + retype(arg0[1], BRW_REGISTER_TYPE_W), + brw_imm_f(0.5)); + } + } else { + float center_offset = c->fp->program.PixelCenterInteger ? 0.0 : 0.5; + + /* Y' = (height - 1) - Y + center */ + brw_ADD(p, + dst[1], + negate(retype(arg0[1], BRW_REGISTER_TYPE_W)), + brw_imm_f(c->key.drawable_height - 1 + center_offset)); + } } } |