src/gallium/drivers/i965/brw_pipe_depth.c

   1
   2 static void *
   3 brw_create_depth_stencil( struct pipe_context *pipe,
   4                           const struct pipe_depth_stencil_alpha_state *tmpl )
   5 {
   6    if (tmpl->stencil[0].enable) {
   7       cc.cc0.stencil_enable = 1;
   8       cc.cc0.stencil_func =
   9          intel_translate_compare_func(key->stencil_func[0]);
  10       cc.cc0.stencil_fail_op =
  11          intel_translate_stencil_op(key->stencil_fail_op[0]);
  12       cc.cc0.stencil_pass_depth_fail_op =
  13          intel_translate_stencil_op(key->stencil_pass_depth_fail_op[0]);
  14       cc.cc0.stencil_pass_depth_pass_op =
  15          intel_translate_stencil_op(key->stencil_pass_depth_pass_op[0]);
  16       cc.cc1.stencil_ref = key->stencil_ref[0];
  17       cc.cc1.stencil_write_mask = key->stencil_write_mask[0];
  18       cc.cc1.stencil_test_mask = key->stencil_test_mask[0];
  19
  20       if (tmpl->stencil[1].enable) {
  21          cc.cc0.bf_stencil_enable = 1;
  22          cc.cc0.bf_stencil_func =
  23             intel_translate_compare_func(key->stencil_func[1]);
  24          cc.cc0.bf_stencil_fail_op =
  25             intel_translate_stencil_op(key->stencil_fail_op[1]);
  26          cc.cc0.bf_stencil_pass_depth_fail_op =
  27             intel_translate_stencil_op(key->stencil_pass_depth_fail_op[1]);
  28          cc.cc0.bf_stencil_pass_depth_pass_op =
  29             intel_translate_stencil_op(key->stencil_pass_depth_pass_op[1]);
  30          cc.cc1.bf_stencil_ref = key->stencil_ref[1];
  31          cc.cc2.bf_stencil_write_mask = key->stencil_write_mask[1];
  32          cc.cc2.bf_stencil_test_mask = key->stencil_test_mask[1];
  33       }
  34
  35       /* Not really sure about this:
  36        */
  37       cc.cc0.stencil_write_enable = (cc.cc1.stencil_write_mask ||
  38                                      cc.cc2.bf_stencil_write_mask);
  39    }
  40
  41
  42    if (key->alpha_enabled) {
  43       cc.cc3.alpha_test = 1;
  44       cc.cc3.alpha_test_func = intel_translate_compare_func(key->alpha_func);
  45       cc.cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
  46
  47       UNCLAMPED_FLOAT_TO_UBYTE(cc.cc7.alpha_ref.ub[0], key->alpha_ref);
  48    }
  49
  50    /* _NEW_DEPTH */
  51    if (key->depth_test) {
  52       cc.cc2.depth_test = 1;
  53       cc.cc2.depth_test_function = intel_translate_compare_func(key->depth_func);
  54       cc.cc2.depth_write_enable = key->depth_write;
  55    }
  56
  57
  58 }