2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) 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 <keith@tungstengraphics.com>
33 #include "main/compiler.h"
34 #include "brw_context.h"
37 #include "brw_state.h"
38 #include "program/prog_print.h"
39 #include "program/prog_parameter.h"
41 #include "glsl/ralloc.h"
43 static inline void assign_vue_slot(struct brw_vue_map
*vue_map
,
46 /* Make sure this varying hasn't been assigned a slot already */
47 assert (vue_map
->varying_to_slot
[varying
] == -1);
49 vue_map
->varying_to_slot
[varying
] = vue_map
->num_slots
;
50 vue_map
->slot_to_varying
[vue_map
->num_slots
++] = varying
;
54 * Compute the VUE map for vertex shader program.
57 brw_compute_vue_map(struct brw_context
*brw
, struct brw_vue_map
*vue_map
,
58 GLbitfield64 slots_valid
)
60 vue_map
->slots_valid
= slots_valid
;
63 /* gl_Layer doesn't get its own varying slot--it's stored in the virst VUE
64 * slot (VARYING_SLOT_PSIZ).
66 slots_valid
&= ~VARYING_BIT_LAYER
;
68 /* Make sure that the values we store in vue_map->varying_to_slot and
69 * vue_map->slot_to_varying won't overflow the signed chars that are used
70 * to store them. Note that since vue_map->slot_to_varying sometimes holds
71 * values equal to BRW_VARYING_SLOT_COUNT, we need to ensure that
72 * BRW_VARYING_SLOT_COUNT is <= 127, not 128.
74 STATIC_ASSERT(BRW_VARYING_SLOT_COUNT
<= 127);
76 vue_map
->num_slots
= 0;
77 for (i
= 0; i
< BRW_VARYING_SLOT_COUNT
; ++i
) {
78 vue_map
->varying_to_slot
[i
] = -1;
79 vue_map
->slot_to_varying
[i
] = BRW_VARYING_SLOT_COUNT
;
82 /* VUE header: format depends on chip generation and whether clipping is
88 /* There are 8 dwords in VUE header pre-Ironlake:
89 * dword 0-3 is indices, point width, clip flags.
90 * dword 4-7 is ndc position
91 * dword 8-11 is the first vertex data.
93 * On Ironlake the VUE header is nominally 20 dwords, but the hardware
94 * will accept the same header layout as Gen4 [and should be a bit faster]
96 assign_vue_slot(vue_map
, VARYING_SLOT_PSIZ
);
97 assign_vue_slot(vue_map
, BRW_VARYING_SLOT_NDC
);
98 assign_vue_slot(vue_map
, VARYING_SLOT_POS
);
102 /* There are 8 or 16 DWs (D0-D15) in VUE header on Sandybridge:
103 * dword 0-3 of the header is indices, point width, clip flags.
104 * dword 4-7 is the 4D space position
105 * dword 8-15 of the vertex header is the user clip distance if
107 * dword 8-11 or 16-19 is the first vertex element data we fill.
109 assign_vue_slot(vue_map
, VARYING_SLOT_PSIZ
);
110 assign_vue_slot(vue_map
, VARYING_SLOT_POS
);
111 if (slots_valid
& BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0
))
112 assign_vue_slot(vue_map
, VARYING_SLOT_CLIP_DIST0
);
113 if (slots_valid
& BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1
))
114 assign_vue_slot(vue_map
, VARYING_SLOT_CLIP_DIST1
);
116 /* front and back colors need to be consecutive so that we can use
117 * ATTRIBUTE_SWIZZLE_INPUTATTR_FACING to swizzle them when doing
120 if (slots_valid
& BITFIELD64_BIT(VARYING_SLOT_COL0
))
121 assign_vue_slot(vue_map
, VARYING_SLOT_COL0
);
122 if (slots_valid
& BITFIELD64_BIT(VARYING_SLOT_BFC0
))
123 assign_vue_slot(vue_map
, VARYING_SLOT_BFC0
);
124 if (slots_valid
& BITFIELD64_BIT(VARYING_SLOT_COL1
))
125 assign_vue_slot(vue_map
, VARYING_SLOT_COL1
);
126 if (slots_valid
& BITFIELD64_BIT(VARYING_SLOT_BFC1
))
127 assign_vue_slot(vue_map
, VARYING_SLOT_BFC1
);
130 assert (!"VUE map not known for this chip generation");
134 /* The hardware doesn't care about the rest of the vertex outputs, so just
135 * assign them contiguously. Don't reassign outputs that already have a
138 * We generally don't need to assign a slot for VARYING_SLOT_CLIP_VERTEX,
139 * since it's encoded as the clip distances by emit_clip_distances().
140 * However, it may be output by transform feedback, and we'd rather not
141 * recompute state when TF changes, so we just always include it.
143 for (int i
= 0; i
< VARYING_SLOT_MAX
; ++i
) {
144 if ((slots_valid
& BITFIELD64_BIT(i
)) &&
145 vue_map
->varying_to_slot
[i
] == -1) {
146 assign_vue_slot(vue_map
, i
);
153 * Decide which set of clip planes should be used when clipping via
154 * gl_Position or gl_ClipVertex.
156 gl_clip_plane
*brw_select_clip_planes(struct gl_context
*ctx
)
158 if (ctx
->Shader
.CurrentVertexProgram
) {
159 /* There is currently a GLSL vertex shader, so clip according to GLSL
160 * rules, which means compare gl_ClipVertex (or gl_Position, if
161 * gl_ClipVertex wasn't assigned) against the eye-coordinate clip planes
162 * that were stored in EyeUserPlane at the time the clip planes were
165 return ctx
->Transform
.EyeUserPlane
;
167 /* Either we are using fixed function or an ARB vertex program. In
168 * either case the clip planes are going to be compared against
169 * gl_Position (which is in clip coordinates) so we have to clip using
170 * _ClipUserPlane, which was transformed into clip coordinates by Mesa
173 return ctx
->Transform
._ClipUserPlane
;
179 brw_vs_prog_data_compare(const void *in_a
, const void *in_b
)
181 const struct brw_vs_prog_data
*a
= in_a
;
182 const struct brw_vs_prog_data
*b
= in_b
;
184 /* Compare the base vec4 structure. */
185 if (!brw_vec4_prog_data_compare(&a
->base
, &b
->base
))
188 /* Compare the rest of the struct. */
189 const unsigned offset
= sizeof(struct brw_vec4_prog_data
);
190 if (memcmp(((char *) a
) + offset
, ((char *) b
) + offset
,
191 sizeof(struct brw_vs_prog_data
) - offset
)) {
199 do_vs_prog(struct brw_context
*brw
,
200 struct gl_shader_program
*prog
,
201 struct brw_vertex_program
*vp
,
202 struct brw_vs_prog_key
*key
)
205 const GLuint
*program
;
206 struct brw_vs_compile c
;
207 struct brw_vs_prog_data prog_data
;
210 struct gl_shader
*vs
= NULL
;
213 vs
= prog
->_LinkedShaders
[MESA_SHADER_VERTEX
];
215 memset(&c
, 0, sizeof(c
));
216 memcpy(&c
.key
, key
, sizeof(*key
));
217 memset(&prog_data
, 0, sizeof(prog_data
));
219 mem_ctx
= ralloc_context(NULL
);
223 /* Allocate the references to the uniforms that will end up in the
224 * prog_data associated with the compiled program, and which will be freed
225 * by the state cache.
229 /* We add padding around uniform values below vec4 size, with the worst
230 * case being a float value that gets blown up to a vec4, so be
233 param_count
= vs
->num_uniform_components
* 4;
236 param_count
= vp
->program
.Base
.Parameters
->NumParameters
* 4;
238 /* vec4_visitor::setup_uniform_clipplane_values() also uploads user clip
239 * planes as uniforms.
241 param_count
+= c
.key
.base
.nr_userclip_plane_consts
* 4;
243 prog_data
.base
.param
= rzalloc_array(NULL
, const float *, param_count
);
244 prog_data
.base
.pull_param
= rzalloc_array(NULL
, const float *, param_count
);
246 GLbitfield64 outputs_written
= vp
->program
.Base
.OutputsWritten
;
247 prog_data
.inputs_read
= vp
->program
.Base
.InputsRead
;
249 if (c
.key
.copy_edgeflag
) {
250 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_EDGE
);
251 prog_data
.inputs_read
|= VERT_BIT_EDGEFLAG
;
255 /* Put dummy slots into the VUE for the SF to put the replaced
256 * point sprite coords in. We shouldn't need these dummy slots,
257 * which take up precious URB space, but it would mean that the SF
258 * doesn't get nice aligned pairs of input coords into output
259 * coords, which would be a pain to handle.
261 for (i
= 0; i
< 8; i
++) {
262 if (c
.key
.point_coord_replace
& (1 << i
))
263 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_TEX0
+ i
);
266 /* if back colors are written, allocate slots for front colors too */
267 if (outputs_written
& BITFIELD64_BIT(VARYING_SLOT_BFC0
))
268 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_COL0
);
269 if (outputs_written
& BITFIELD64_BIT(VARYING_SLOT_BFC1
))
270 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_COL1
);
273 /* In order for legacy clipping to work, we need to populate the clip
274 * distance varying slots whenever clipping is enabled, even if the vertex
275 * shader doesn't write to gl_ClipDistance.
277 if (c
.key
.base
.userclip_active
) {
278 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0
);
279 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1
);
282 brw_compute_vue_map(brw
, &prog_data
.base
.vue_map
, outputs_written
);
285 _mesa_fprint_program_opt(stdout
, &c
.vp
->program
.Base
, PROG_PRINT_DEBUG
,
291 program
= brw_vs_emit(brw
, prog
, &c
, &prog_data
, mem_ctx
, &program_size
);
292 if (program
== NULL
) {
293 ralloc_free(mem_ctx
);
297 /* Scratch space is used for register spilling */
298 if (c
.base
.last_scratch
) {
299 perf_debug("Vertex shader triggered register spilling. "
300 "Try reducing the number of live vec4 values to "
301 "improve performance.\n");
303 prog_data
.base
.total_scratch
304 = brw_get_scratch_size(c
.base
.last_scratch
*REG_SIZE
);
306 brw_get_scratch_bo(brw
, &brw
->vs
.base
.scratch_bo
,
307 prog_data
.base
.total_scratch
* brw
->max_vs_threads
);
310 brw_upload_cache(&brw
->cache
, BRW_VS_PROG
,
311 &c
.key
, sizeof(c
.key
),
312 program
, program_size
,
313 &prog_data
, sizeof(prog_data
),
314 &brw
->vs
.base
.prog_offset
, &brw
->vs
.prog_data
);
315 ralloc_free(mem_ctx
);
321 key_debug(struct brw_context
*brw
, const char *name
, int a
, int b
)
324 perf_debug(" %s %d->%d\n", name
, a
, b
);
331 brw_vs_debug_recompile(struct brw_context
*brw
,
332 struct gl_shader_program
*prog
,
333 const struct brw_vs_prog_key
*key
)
335 struct brw_cache_item
*c
= NULL
;
336 const struct brw_vs_prog_key
*old_key
= NULL
;
339 perf_debug("Recompiling vertex shader for program %d\n", prog
->Name
);
341 for (unsigned int i
= 0; i
< brw
->cache
.size
; i
++) {
342 for (c
= brw
->cache
.items
[i
]; c
; c
= c
->next
) {
343 if (c
->cache_id
== BRW_VS_PROG
) {
346 if (old_key
->base
.program_string_id
== key
->base
.program_string_id
)
355 perf_debug(" Didn't find previous compile in the shader cache for "
360 for (unsigned int i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
361 found
|= key_debug(brw
, "Vertex attrib w/a flags",
362 old_key
->gl_attrib_wa_flags
[i
],
363 key
->gl_attrib_wa_flags
[i
]);
366 found
|= key_debug(brw
, "user clip flags",
367 old_key
->base
.userclip_active
, key
->base
.userclip_active
);
369 found
|= key_debug(brw
, "user clipping planes as push constants",
370 old_key
->base
.nr_userclip_plane_consts
,
371 key
->base
.nr_userclip_plane_consts
);
373 found
|= key_debug(brw
, "clip distance enable",
374 old_key
->base
.uses_clip_distance
, key
->base
.uses_clip_distance
);
375 found
|= key_debug(brw
, "copy edgeflag",
376 old_key
->copy_edgeflag
, key
->copy_edgeflag
);
377 found
|= key_debug(brw
, "PointCoord replace",
378 old_key
->point_coord_replace
, key
->point_coord_replace
);
379 found
|= key_debug(brw
, "vertex color clamping",
380 old_key
->base
.clamp_vertex_color
, key
->base
.clamp_vertex_color
);
382 found
|= brw_debug_recompile_sampler_key(brw
, &old_key
->base
.tex
,
386 perf_debug(" Something else\n");
392 brw_setup_vec4_key_clip_info(struct brw_context
*brw
,
393 struct brw_vec4_prog_key
*key
,
394 bool program_uses_clip_distance
)
396 struct gl_context
*ctx
= &brw
->ctx
;
398 key
->userclip_active
= (ctx
->Transform
.ClipPlanesEnabled
!= 0);
399 key
->uses_clip_distance
= program_uses_clip_distance
;
400 if (key
->userclip_active
&& !key
->uses_clip_distance
) {
401 key
->nr_userclip_plane_consts
402 = _mesa_logbase2(ctx
->Transform
.ClipPlanesEnabled
) + 1;
407 static void brw_upload_vs_prog(struct brw_context
*brw
)
409 struct gl_context
*ctx
= &brw
->ctx
;
410 struct brw_vs_prog_key key
;
411 /* BRW_NEW_VERTEX_PROGRAM */
412 struct brw_vertex_program
*vp
=
413 (struct brw_vertex_program
*)brw
->vertex_program
;
414 struct gl_program
*prog
= (struct gl_program
*) brw
->vertex_program
;
417 memset(&key
, 0, sizeof(key
));
419 /* Just upload the program verbatim for now. Always send it all
420 * the inputs it asks for, whether they are varying or not.
422 key
.base
.program_string_id
= vp
->id
;
423 brw_setup_vec4_key_clip_info(brw
, &key
.base
, vp
->program
.UsesClipDistance
);
427 key
.copy_edgeflag
= (ctx
->Polygon
.FrontMode
!= GL_FILL
||
428 ctx
->Polygon
.BackMode
!= GL_FILL
);
431 /* _NEW_LIGHT | _NEW_BUFFERS */
432 key
.base
.clamp_vertex_color
= ctx
->Light
._ClampVertexColor
;
435 if (brw
->gen
< 6 && ctx
->Point
.PointSprite
) {
436 for (i
= 0; i
< 8; i
++) {
437 if (ctx
->Point
.CoordReplace
[i
])
438 key
.point_coord_replace
|= (1 << i
);
443 brw_populate_sampler_prog_key_data(ctx
, prog
, brw
->vs
.base
.sampler_count
,
446 /* BRW_NEW_VERTICES */
447 if (brw
->gen
< 8 && !brw
->is_haswell
) {
448 /* Prior to Haswell, the hardware can't natively support GL_FIXED or
449 * 2_10_10_10_REV vertex formats. Set appropriate workaround flags.
451 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
452 if (!(vp
->program
.Base
.InputsRead
& BITFIELD64_BIT(i
)))
455 uint8_t wa_flags
= 0;
457 switch (brw
->vb
.inputs
[i
].glarray
->Type
) {
460 wa_flags
= brw
->vb
.inputs
[i
].glarray
->Size
;
463 case GL_INT_2_10_10_10_REV
:
464 wa_flags
|= BRW_ATTRIB_WA_SIGN
;
467 case GL_UNSIGNED_INT_2_10_10_10_REV
:
468 if (brw
->vb
.inputs
[i
].glarray
->Format
== GL_BGRA
)
469 wa_flags
|= BRW_ATTRIB_WA_BGRA
;
471 if (brw
->vb
.inputs
[i
].glarray
->Normalized
)
472 wa_flags
|= BRW_ATTRIB_WA_NORMALIZE
;
473 else if (!brw
->vb
.inputs
[i
].glarray
->Integer
)
474 wa_flags
|= BRW_ATTRIB_WA_SCALE
;
479 key
.gl_attrib_wa_flags
[i
] = wa_flags
;
483 if (!brw_search_cache(&brw
->cache
, BRW_VS_PROG
,
485 &brw
->vs
.base
.prog_offset
, &brw
->vs
.prog_data
)) {
486 bool success
= do_vs_prog(brw
, ctx
->Shader
.CurrentVertexProgram
,
491 if (memcmp(&brw
->vs
.prog_data
->base
.vue_map
, &brw
->vue_map_geom_out
,
492 sizeof(brw
->vue_map_geom_out
)) != 0) {
493 brw
->vue_map_vs
= brw
->vs
.prog_data
->base
.vue_map
;
494 brw
->state
.dirty
.brw
|= BRW_NEW_VUE_MAP_VS
;
496 /* No geometry shader support, so the VS VUE map is the VUE map for
497 * the output of the "geometry" portion of the pipeline.
499 brw
->vue_map_geom_out
= brw
->vue_map_vs
;
500 brw
->state
.dirty
.brw
|= BRW_NEW_VUE_MAP_GEOM_OUT
;
507 const struct brw_tracked_state brw_vs_prog
= {
509 .mesa
= (_NEW_TRANSFORM
| _NEW_POLYGON
| _NEW_POINT
| _NEW_LIGHT
|
512 .brw
= (BRW_NEW_VERTEX_PROGRAM
|
516 .emit
= brw_upload_vs_prog
520 brw_vs_precompile(struct gl_context
*ctx
, struct gl_shader_program
*prog
)
522 struct brw_context
*brw
= brw_context(ctx
);
523 struct brw_vs_prog_key key
;
524 uint32_t old_prog_offset
= brw
->vs
.base
.prog_offset
;
525 struct brw_vs_prog_data
*old_prog_data
= brw
->vs
.prog_data
;
528 if (!prog
->_LinkedShaders
[MESA_SHADER_VERTEX
])
531 struct gl_vertex_program
*vp
= (struct gl_vertex_program
*)
532 prog
->_LinkedShaders
[MESA_SHADER_VERTEX
]->Program
;
533 struct brw_vertex_program
*bvp
= brw_vertex_program(vp
);
535 memset(&key
, 0, sizeof(key
));
537 key
.base
.program_string_id
= bvp
->id
;
538 key
.base
.clamp_vertex_color
= ctx
->API
== API_OPENGL_COMPAT
;
540 unsigned sampler_count
= _mesa_fls(vp
->Base
.SamplersUsed
);
541 for (unsigned i
= 0; i
< sampler_count
; i
++) {
542 if (vp
->Base
.ShadowSamplers
& (1 << i
)) {
543 /* Assume DEPTH_TEXTURE_MODE is the default: X, X, X, 1 */
544 key
.base
.tex
.swizzles
[i
] =
545 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_ONE
);
547 /* Color sampler: assume no swizzling. */
548 key
.base
.tex
.swizzles
[i
] = SWIZZLE_XYZW
;
552 success
= do_vs_prog(brw
, prog
, bvp
, &key
);
554 brw
->vs
.base
.prog_offset
= old_prog_offset
;
555 brw
->vs
.prog_data
= old_prog_data
;
562 brw_vs_prog_data_free(const void *in_prog_data
)
564 const struct brw_vs_prog_data
*prog_data
= in_prog_data
;
566 brw_vec4_prog_data_free(&prog_data
->base
);