2 * Copyright © 2013 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 #include "brw_state.h"
26 static char const *get_qual_name(int mode
)
29 case INTERP_QUALIFIER_NONE
: return "none";
30 case INTERP_QUALIFIER_FLAT
: return "flat";
31 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
32 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "nopersp";
33 default: return "???";
38 /* Set up interpolation modes for every element in the VUE */
40 brw_setup_vue_interpolation(struct brw_context
*brw
)
42 const struct gl_fragment_program
*fprog
= brw
->fragment_program
;
43 struct brw_vue_map
*vue_map
= &brw
->vue_map_geom_out
;
45 memset(&brw
->interpolation_mode
, INTERP_QUALIFIER_NONE
, sizeof(brw
->interpolation_mode
));
47 brw
->state
.dirty
.brw
|= BRW_NEW_INTERPOLATION_MAP
;
52 for (int i
= 0; i
< vue_map
->num_slots
; i
++) {
53 int varying
= vue_map
->slot_to_varying
[i
];
57 /* HPOS always wants noperspective. setting it up here allows
58 * us to not need special handling in the SF program. */
59 if (varying
== VARYING_SLOT_POS
) {
60 brw
->interpolation_mode
.mode
[i
] = INTERP_QUALIFIER_NOPERSPECTIVE
;
64 int frag_attrib
= varying
;
65 if (varying
== VARYING_SLOT_BFC0
|| varying
== VARYING_SLOT_BFC1
)
66 frag_attrib
= varying
- VARYING_SLOT_BFC0
+ VARYING_SLOT_COL0
;
68 if (!(fprog
->Base
.InputsRead
& BITFIELD64_BIT(frag_attrib
)))
71 enum glsl_interp_qualifier mode
= fprog
->InterpQualifier
[frag_attrib
];
73 /* If the mode is not specified, the default varies: Color values
74 * follow GL_SHADE_MODEL; everything else is smooth.
76 if (mode
== INTERP_QUALIFIER_NONE
) {
77 if (frag_attrib
== VARYING_SLOT_COL0
|| frag_attrib
== VARYING_SLOT_COL1
)
78 mode
= brw
->ctx
.Light
.ShadeModel
== GL_FLAT
79 ? INTERP_QUALIFIER_FLAT
: INTERP_QUALIFIER_SMOOTH
;
81 mode
= INTERP_QUALIFIER_SMOOTH
;
84 brw
->interpolation_mode
.mode
[i
] = mode
;
87 if (unlikely(INTEL_DEBUG
& DEBUG_VUE
)) {
88 fprintf(stderr
, "VUE map:\n");
89 for (int i
= 0; i
< vue_map
->num_slots
; i
++) {
90 int varying
= vue_map
->slot_to_varying
[i
];
92 fprintf(stderr
, "%d: --\n", i
);
96 fprintf(stderr
, "%d: %d %s ofs %d\n",
98 get_qual_name(brw
->interpolation_mode
.mode
[i
]),
99 brw_vue_slot_to_offset(i
));
105 const struct brw_tracked_state brw_interpolation_map
= {
108 .brw
= (BRW_NEW_FRAGMENT_PROGRAM
|
109 BRW_NEW_VUE_MAP_GEOM_OUT
)
111 .emit
= brw_setup_vue_interpolation