2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keithw@vmware.com>
32 #include "main/glheader.h"
33 #include "main/macros.h"
34 #include "main/enums.h"
35 #include "main/transformfeedback.h"
37 #include "intel_batchbuffer.h"
39 #include "brw_defines.h"
40 #include "brw_context.h"
43 #include "brw_state.h"
46 #include "glsl/ralloc.h"
48 static void compile_ff_gs_prog(struct brw_context
*brw
,
49 struct brw_ff_gs_prog_key
*key
)
51 struct brw_ff_gs_compile c
;
52 const GLuint
*program
;
56 memset(&c
, 0, sizeof(c
));
59 c
.vue_map
= brw
->vs
.prog_data
->base
.vue_map
;
60 c
.nr_regs
= (c
.vue_map
.num_slots
+ 1)/2;
62 mem_ctx
= ralloc_context(NULL
);
64 /* Begin the compilation:
66 brw_init_compile(brw
, &c
.func
, mem_ctx
);
68 c
.func
.single_program_flow
= 1;
70 /* For some reason the thread is spawned with only 4 channels
73 brw_set_mask_control(&c
.func
, BRW_MASK_DISABLE
);
78 /* On Sandybridge, we use the GS for implementing transform feedback
79 * (called "Stream Out" in the PRM).
81 switch (key
->primitive
) {
82 case _3DPRIM_POINTLIST
:
84 check_edge_flag
= false;
86 case _3DPRIM_LINELIST
:
87 case _3DPRIM_LINESTRIP
:
88 case _3DPRIM_LINELOOP
:
90 check_edge_flag
= false;
94 case _3DPRIM_TRISTRIP
:
95 case _3DPRIM_RECTLIST
:
97 check_edge_flag
= false;
99 case _3DPRIM_QUADLIST
:
100 case _3DPRIM_QUADSTRIP
:
101 case _3DPRIM_POLYGON
:
103 check_edge_flag
= true;
106 assert(!"Unexpected primitive type in Gen6 SOL program.");
109 gen6_sol_program(&c
, key
, num_verts
, check_edge_flag
);
111 /* On Gen4-5, we use the GS to decompose certain types of primitives.
112 * Note that primitives which don't require a GS program have already
113 * been weeded out by now.
115 switch (key
->primitive
) {
116 case _3DPRIM_QUADLIST
:
117 brw_ff_gs_quads( &c
, key
);
119 case _3DPRIM_QUADSTRIP
:
120 brw_ff_gs_quad_strip( &c
, key
);
122 case _3DPRIM_LINELOOP
:
123 brw_ff_gs_lines( &c
);
126 ralloc_free(mem_ctx
);
131 brw_compact_instructions(&c
.func
);
135 program
= brw_get_program(&c
.func
, &program_size
);
137 if (unlikely(INTEL_DEBUG
& DEBUG_GS
)) {
138 fprintf(stderr
, "gs:\n");
139 brw_dump_compile(brw
, c
.func
.store
, 0, program_size
, stderr
);
140 fprintf(stderr
, "\n");
143 brw_upload_cache(&brw
->cache
, BRW_FF_GS_PROG
,
144 &c
.key
, sizeof(c
.key
),
145 program
, program_size
,
146 &c
.prog_data
, sizeof(c
.prog_data
),
147 &brw
->ff_gs
.prog_offset
, &brw
->ff_gs
.prog_data
);
148 ralloc_free(mem_ctx
);
151 static void populate_key(struct brw_context
*brw
,
152 struct brw_ff_gs_prog_key
*key
)
154 static const unsigned swizzle_for_offset
[4] = {
155 BRW_SWIZZLE4(0, 1, 2, 3),
156 BRW_SWIZZLE4(1, 2, 3, 3),
157 BRW_SWIZZLE4(2, 3, 3, 3),
158 BRW_SWIZZLE4(3, 3, 3, 3)
161 struct gl_context
*ctx
= &brw
->ctx
;
163 memset(key
, 0, sizeof(*key
));
165 /* CACHE_NEW_VS_PROG (part of VUE map) */
166 key
->attrs
= brw
->vs
.prog_data
->base
.vue_map
.slots_valid
;
168 /* BRW_NEW_PRIMITIVE */
169 key
->primitive
= brw
->primitive
;
172 key
->pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
173 if (key
->primitive
== _3DPRIM_QUADLIST
&& ctx
->Light
.ShadeModel
!= GL_FLAT
) {
174 /* Provide consistent primitive order with brw_set_prim's
175 * optimization of single quads to trifans.
177 key
->pv_first
= true;
181 /* On Gen7 and later, we don't use GS (yet). */
182 key
->need_gs_prog
= false;
183 } else if (brw
->gen
== 6) {
184 /* On Gen6, GS is used for transform feedback. */
185 /* BRW_NEW_TRANSFORM_FEEDBACK */
186 if (_mesa_is_xfb_active_and_unpaused(ctx
)) {
187 const struct gl_shader_program
*shaderprog
=
188 ctx
->_Shader
->CurrentProgram
[MESA_SHADER_VERTEX
];
189 const struct gl_transform_feedback_info
*linked_xfb_info
=
190 &shaderprog
->LinkedTransformFeedback
;
193 /* Make sure that the VUE slots won't overflow the unsigned chars in
194 * key->transform_feedback_bindings[].
196 STATIC_ASSERT(BRW_VARYING_SLOT_COUNT
<= 256);
198 /* Make sure that we don't need more binding table entries than we've
199 * set aside for use in transform feedback. (We shouldn't, since we
200 * set aside enough binding table entries to have one per component).
202 assert(linked_xfb_info
->NumOutputs
<= BRW_MAX_SOL_BINDINGS
);
204 key
->need_gs_prog
= true;
205 key
->num_transform_feedback_bindings
= linked_xfb_info
->NumOutputs
;
206 for (i
= 0; i
< key
->num_transform_feedback_bindings
; ++i
) {
207 key
->transform_feedback_bindings
[i
] =
208 linked_xfb_info
->Outputs
[i
].OutputRegister
;
209 key
->transform_feedback_swizzles
[i
] =
210 swizzle_for_offset
[linked_xfb_info
->Outputs
[i
].ComponentOffset
];
214 /* Pre-gen6, GS is used to transform QUADLIST, QUADSTRIP, and LINELOOP
215 * into simpler primitives.
217 key
->need_gs_prog
= (brw
->primitive
== _3DPRIM_QUADLIST
||
218 brw
->primitive
== _3DPRIM_QUADSTRIP
||
219 brw
->primitive
== _3DPRIM_LINELOOP
);
223 /* Calculate interpolants for triangle and line rasterization.
226 brw_upload_ff_gs_prog(struct brw_context
*brw
)
228 struct brw_ff_gs_prog_key key
;
231 populate_key(brw
, &key
);
233 if (brw
->ff_gs
.prog_active
!= key
.need_gs_prog
) {
234 brw
->state
.dirty
.cache
|= CACHE_NEW_FF_GS_PROG
;
235 brw
->ff_gs
.prog_active
= key
.need_gs_prog
;
238 if (brw
->ff_gs
.prog_active
) {
239 if (!brw_search_cache(&brw
->cache
, BRW_FF_GS_PROG
,
241 &brw
->ff_gs
.prog_offset
, &brw
->ff_gs
.prog_data
)) {
242 compile_ff_gs_prog( brw
, &key
);
248 const struct brw_tracked_state brw_ff_gs_prog
= {
250 .mesa
= (_NEW_LIGHT
),
251 .brw
= (BRW_NEW_PRIMITIVE
|
252 BRW_NEW_TRANSFORM_FEEDBACK
),
253 .cache
= CACHE_NEW_VS_PROG
255 .emit
= brw_upload_ff_gs_prog