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
,
180 int aux_size
, const void *in_key
)
182 const struct brw_vs_prog_data
*a
= in_a
;
183 const struct brw_vs_prog_data
*b
= in_b
;
185 /* Compare the base vec4 structure. */
186 if (!brw_vec4_prog_data_compare(&a
->base
, &b
->base
))
189 /* Compare the rest of the struct. */
190 const unsigned offset
= sizeof(struct brw_vec4_prog_data
);
191 if (memcmp(((char *) a
) + offset
, ((char *) b
) + offset
,
192 sizeof(struct brw_vs_prog_data
) - offset
)) {
200 do_vs_prog(struct brw_context
*brw
,
201 struct gl_shader_program
*prog
,
202 struct brw_vertex_program
*vp
,
203 struct brw_vs_prog_key
*key
)
206 const GLuint
*program
;
207 struct brw_vs_compile c
;
208 struct brw_vs_prog_data prog_data
;
211 struct gl_shader
*vs
= NULL
;
214 vs
= prog
->_LinkedShaders
[MESA_SHADER_VERTEX
];
216 memset(&c
, 0, sizeof(c
));
217 memcpy(&c
.key
, key
, sizeof(*key
));
218 memset(&prog_data
, 0, sizeof(prog_data
));
220 mem_ctx
= ralloc_context(NULL
);
224 /* Allocate the references to the uniforms that will end up in the
225 * prog_data associated with the compiled program, and which will be freed
226 * by the state cache.
230 /* We add padding around uniform values below vec4 size, with the worst
231 * case being a float value that gets blown up to a vec4, so be
234 param_count
= vs
->num_uniform_components
* 4;
237 param_count
= vp
->program
.Base
.Parameters
->NumParameters
* 4;
239 /* vec4_visitor::setup_uniform_clipplane_values() also uploads user clip
240 * planes as uniforms.
242 param_count
+= c
.key
.base
.nr_userclip_plane_consts
* 4;
244 prog_data
.base
.param
= rzalloc_array(NULL
, const float *, param_count
);
245 prog_data
.base
.pull_param
= rzalloc_array(NULL
, const float *, param_count
);
247 GLbitfield64 outputs_written
= vp
->program
.Base
.OutputsWritten
;
248 prog_data
.inputs_read
= vp
->program
.Base
.InputsRead
;
250 if (c
.key
.copy_edgeflag
) {
251 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_EDGE
);
252 prog_data
.inputs_read
|= VERT_BIT_EDGEFLAG
;
256 /* Put dummy slots into the VUE for the SF to put the replaced
257 * point sprite coords in. We shouldn't need these dummy slots,
258 * which take up precious URB space, but it would mean that the SF
259 * doesn't get nice aligned pairs of input coords into output
260 * coords, which would be a pain to handle.
262 for (i
= 0; i
< 8; i
++) {
263 if (c
.key
.point_coord_replace
& (1 << i
))
264 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_TEX0
+ i
);
267 /* if back colors are written, allocate slots for front colors too */
268 if (outputs_written
& BITFIELD64_BIT(VARYING_SLOT_BFC0
))
269 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_COL0
);
270 if (outputs_written
& BITFIELD64_BIT(VARYING_SLOT_BFC1
))
271 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_COL1
);
274 /* In order for legacy clipping to work, we need to populate the clip
275 * distance varying slots whenever clipping is enabled, even if the vertex
276 * shader doesn't write to gl_ClipDistance.
278 if (c
.key
.base
.userclip_active
) {
279 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0
);
280 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1
);
283 brw_compute_vue_map(brw
, &prog_data
.base
.vue_map
, outputs_written
);
286 _mesa_fprint_program_opt(stdout
, &c
.vp
->program
.Base
, PROG_PRINT_DEBUG
,
292 program
= brw_vs_emit(brw
, prog
, &c
, &prog_data
, mem_ctx
, &program_size
);
293 if (program
== NULL
) {
294 ralloc_free(mem_ctx
);
298 /* Scratch space is used for register spilling */
299 if (c
.base
.last_scratch
) {
300 perf_debug("Vertex shader triggered register spilling. "
301 "Try reducing the number of live vec4 values to "
302 "improve performance.\n");
304 prog_data
.base
.total_scratch
305 = brw_get_scratch_size(c
.base
.last_scratch
*REG_SIZE
);
307 brw_get_scratch_bo(brw
, &brw
->vs
.base
.scratch_bo
,
308 prog_data
.base
.total_scratch
* brw
->max_vs_threads
);
311 brw_upload_cache(&brw
->cache
, BRW_VS_PROG
,
312 &c
.key
, sizeof(c
.key
),
313 program
, program_size
,
314 &prog_data
, sizeof(prog_data
),
315 &brw
->vs
.base
.prog_offset
, &brw
->vs
.prog_data
);
316 ralloc_free(mem_ctx
);
322 key_debug(struct brw_context
*brw
, const char *name
, int a
, int b
)
325 perf_debug(" %s %d->%d\n", name
, a
, b
);
332 brw_vs_debug_recompile(struct brw_context
*brw
,
333 struct gl_shader_program
*prog
,
334 const struct brw_vs_prog_key
*key
)
336 struct brw_cache_item
*c
= NULL
;
337 const struct brw_vs_prog_key
*old_key
= NULL
;
340 perf_debug("Recompiling vertex shader for program %d\n", prog
->Name
);
342 for (unsigned int i
= 0; i
< brw
->cache
.size
; i
++) {
343 for (c
= brw
->cache
.items
[i
]; c
; c
= c
->next
) {
344 if (c
->cache_id
== BRW_VS_PROG
) {
347 if (old_key
->base
.program_string_id
== key
->base
.program_string_id
)
356 perf_debug(" Didn't find previous compile in the shader cache for "
361 for (unsigned int i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
362 found
|= key_debug(brw
, "Vertex attrib w/a flags",
363 old_key
->gl_attrib_wa_flags
[i
],
364 key
->gl_attrib_wa_flags
[i
]);
367 found
|= key_debug(brw
, "user clip flags",
368 old_key
->base
.userclip_active
, key
->base
.userclip_active
);
370 found
|= key_debug(brw
, "user clipping planes as push constants",
371 old_key
->base
.nr_userclip_plane_consts
,
372 key
->base
.nr_userclip_plane_consts
);
374 found
|= key_debug(brw
, "clip distance enable",
375 old_key
->base
.uses_clip_distance
, key
->base
.uses_clip_distance
);
376 found
|= key_debug(brw
, "copy edgeflag",
377 old_key
->copy_edgeflag
, key
->copy_edgeflag
);
378 found
|= key_debug(brw
, "PointCoord replace",
379 old_key
->point_coord_replace
, key
->point_coord_replace
);
380 found
|= key_debug(brw
, "vertex color clamping",
381 old_key
->base
.clamp_vertex_color
, key
->base
.clamp_vertex_color
);
383 found
|= brw_debug_recompile_sampler_key(brw
, &old_key
->base
.tex
,
387 perf_debug(" Something else\n");
393 brw_setup_vec4_key_clip_info(struct brw_context
*brw
,
394 struct brw_vec4_prog_key
*key
,
395 bool program_uses_clip_distance
)
397 struct gl_context
*ctx
= &brw
->ctx
;
399 key
->userclip_active
= (ctx
->Transform
.ClipPlanesEnabled
!= 0);
400 key
->uses_clip_distance
= program_uses_clip_distance
;
401 if (key
->userclip_active
&& !key
->uses_clip_distance
) {
402 key
->nr_userclip_plane_consts
403 = _mesa_logbase2(ctx
->Transform
.ClipPlanesEnabled
) + 1;
408 static void brw_upload_vs_prog(struct brw_context
*brw
)
410 struct gl_context
*ctx
= &brw
->ctx
;
411 struct brw_vs_prog_key key
;
412 /* BRW_NEW_VERTEX_PROGRAM */
413 struct brw_vertex_program
*vp
=
414 (struct brw_vertex_program
*)brw
->vertex_program
;
415 struct gl_program
*prog
= (struct gl_program
*) brw
->vertex_program
;
418 memset(&key
, 0, sizeof(key
));
420 /* Just upload the program verbatim for now. Always send it all
421 * the inputs it asks for, whether they are varying or not.
423 key
.base
.program_string_id
= vp
->id
;
424 brw_setup_vec4_key_clip_info(brw
, &key
.base
, vp
->program
.UsesClipDistance
);
428 key
.copy_edgeflag
= (ctx
->Polygon
.FrontMode
!= GL_FILL
||
429 ctx
->Polygon
.BackMode
!= GL_FILL
);
432 /* _NEW_LIGHT | _NEW_BUFFERS */
433 key
.base
.clamp_vertex_color
= ctx
->Light
._ClampVertexColor
;
436 if (brw
->gen
< 6 && ctx
->Point
.PointSprite
) {
437 for (i
= 0; i
< 8; i
++) {
438 if (ctx
->Point
.CoordReplace
[i
])
439 key
.point_coord_replace
|= (1 << i
);
444 brw_populate_sampler_prog_key_data(ctx
, prog
, brw
->vs
.base
.sampler_count
,
447 /* BRW_NEW_VERTICES */
448 if (brw
->gen
< 8 && !brw
->is_haswell
) {
449 /* Prior to Haswell, the hardware can't natively support GL_FIXED or
450 * 2_10_10_10_REV vertex formats. Set appropriate workaround flags.
452 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
453 if (!(vp
->program
.Base
.InputsRead
& BITFIELD64_BIT(i
)))
456 uint8_t wa_flags
= 0;
458 switch (brw
->vb
.inputs
[i
].glarray
->Type
) {
461 wa_flags
= brw
->vb
.inputs
[i
].glarray
->Size
;
464 case GL_INT_2_10_10_10_REV
:
465 wa_flags
|= BRW_ATTRIB_WA_SIGN
;
468 case GL_UNSIGNED_INT_2_10_10_10_REV
:
469 if (brw
->vb
.inputs
[i
].glarray
->Format
== GL_BGRA
)
470 wa_flags
|= BRW_ATTRIB_WA_BGRA
;
472 if (brw
->vb
.inputs
[i
].glarray
->Normalized
)
473 wa_flags
|= BRW_ATTRIB_WA_NORMALIZE
;
474 else if (!brw
->vb
.inputs
[i
].glarray
->Integer
)
475 wa_flags
|= BRW_ATTRIB_WA_SCALE
;
480 key
.gl_attrib_wa_flags
[i
] = wa_flags
;
484 if (!brw_search_cache(&brw
->cache
, BRW_VS_PROG
,
486 &brw
->vs
.base
.prog_offset
, &brw
->vs
.prog_data
)) {
487 bool success
= do_vs_prog(brw
, ctx
->Shader
.CurrentVertexProgram
,
492 if (memcmp(&brw
->vs
.prog_data
->base
.vue_map
, &brw
->vue_map_geom_out
,
493 sizeof(brw
->vue_map_geom_out
)) != 0) {
494 brw
->vue_map_vs
= brw
->vs
.prog_data
->base
.vue_map
;
495 brw
->state
.dirty
.brw
|= BRW_NEW_VUE_MAP_VS
;
497 /* No geometry shader support, so the VS VUE map is the VUE map for
498 * the output of the "geometry" portion of the pipeline.
500 brw
->vue_map_geom_out
= brw
->vue_map_vs
;
501 brw
->state
.dirty
.brw
|= BRW_NEW_VUE_MAP_GEOM_OUT
;
508 const struct brw_tracked_state brw_vs_prog
= {
510 .mesa
= (_NEW_TRANSFORM
| _NEW_POLYGON
| _NEW_POINT
| _NEW_LIGHT
|
513 .brw
= (BRW_NEW_VERTEX_PROGRAM
|
517 .emit
= brw_upload_vs_prog
521 brw_vs_precompile(struct gl_context
*ctx
, struct gl_shader_program
*prog
)
523 struct brw_context
*brw
= brw_context(ctx
);
524 struct brw_vs_prog_key key
;
525 uint32_t old_prog_offset
= brw
->vs
.base
.prog_offset
;
526 struct brw_vs_prog_data
*old_prog_data
= brw
->vs
.prog_data
;
529 if (!prog
->_LinkedShaders
[MESA_SHADER_VERTEX
])
532 struct gl_vertex_program
*vp
= (struct gl_vertex_program
*)
533 prog
->_LinkedShaders
[MESA_SHADER_VERTEX
]->Program
;
534 struct brw_vertex_program
*bvp
= brw_vertex_program(vp
);
536 memset(&key
, 0, sizeof(key
));
538 key
.base
.program_string_id
= bvp
->id
;
539 key
.base
.clamp_vertex_color
= ctx
->API
== API_OPENGL_COMPAT
;
541 unsigned sampler_count
= _mesa_fls(vp
->Base
.SamplersUsed
);
542 for (unsigned i
= 0; i
< sampler_count
; i
++) {
543 if (vp
->Base
.ShadowSamplers
& (1 << i
)) {
544 /* Assume DEPTH_TEXTURE_MODE is the default: X, X, X, 1 */
545 key
.base
.tex
.swizzles
[i
] =
546 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_ONE
);
548 /* Color sampler: assume no swizzling. */
549 key
.base
.tex
.swizzles
[i
] = SWIZZLE_XYZW
;
553 success
= do_vs_prog(brw
, prog
, bvp
, &key
);
555 brw
->vs
.base
.prog_offset
= old_prog_offset
;
556 brw
->vs
.prog_data
= old_prog_data
;
563 brw_vs_prog_data_free(const void *in_prog_data
)
565 const struct brw_vs_prog_data
*prog_data
= in_prog_data
;
567 brw_vec4_prog_data_free(&prog_data
->base
);