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>
33 #include "main/compiler.h"
34 #include "main/context.h"
35 #include "brw_context.h"
38 #include "brw_state.h"
39 #include "program/prog_print.h"
40 #include "program/prog_parameter.h"
41 #include "compiler/brw_nir.h"
42 #include "brw_program.h"
44 #include "util/ralloc.h"
47 * Decide which set of clip planes should be used when clipping via
48 * gl_Position or gl_ClipVertex.
51 brw_select_clip_planes(struct gl_context
*ctx
)
53 if (ctx
->_Shader
->CurrentProgram
[MESA_SHADER_VERTEX
]) {
54 /* There is currently a GLSL vertex shader, so clip according to GLSL
55 * rules, which means compare gl_ClipVertex (or gl_Position, if
56 * gl_ClipVertex wasn't assigned) against the eye-coordinate clip planes
57 * that were stored in EyeUserPlane at the time the clip planes were
60 return ctx
->Transform
.EyeUserPlane
;
62 /* Either we are using fixed function or an ARB vertex program. In
63 * either case the clip planes are going to be compared against
64 * gl_Position (which is in clip coordinates) so we have to clip using
65 * _ClipUserPlane, which was transformed into clip coordinates by Mesa
68 return ctx
->Transform
._ClipUserPlane
;
73 brw_vs_outputs_written(struct brw_context
*brw
, struct brw_vs_prog_key
*key
,
74 GLbitfield64 user_varyings
)
76 const struct gen_device_info
*devinfo
= &brw
->screen
->devinfo
;
77 GLbitfield64 outputs_written
= user_varyings
;
79 if (key
->copy_edgeflag
) {
80 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_EDGE
);
83 if (devinfo
->gen
< 6) {
84 /* Put dummy slots into the VUE for the SF to put the replaced
85 * point sprite coords in. We shouldn't need these dummy slots,
86 * which take up precious URB space, but it would mean that the SF
87 * doesn't get nice aligned pairs of input coords into output
88 * coords, which would be a pain to handle.
90 for (unsigned i
= 0; i
< 8; i
++) {
91 if (key
->point_coord_replace
& (1 << i
))
92 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_TEX0
+ i
);
95 /* if back colors are written, allocate slots for front colors too */
96 if (outputs_written
& BITFIELD64_BIT(VARYING_SLOT_BFC0
))
97 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_COL0
);
98 if (outputs_written
& BITFIELD64_BIT(VARYING_SLOT_BFC1
))
99 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_COL1
);
102 /* In order for legacy clipping to work, we need to populate the clip
103 * distance varying slots whenever clipping is enabled, even if the vertex
104 * shader doesn't write to gl_ClipDistance.
106 if (key
->nr_userclip_plane_consts
> 0) {
107 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0
);
108 outputs_written
|= BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1
);
111 return outputs_written
;
115 brw_vs_debug_recompile(struct brw_context
*brw
, struct gl_program
*prog
,
116 const struct brw_vs_prog_key
*key
)
118 perf_debug("Recompiling vertex shader for program %d\n", prog
->Id
);
121 const struct brw_vs_prog_key
*old_key
=
122 brw_find_previous_compile(&brw
->cache
, BRW_CACHE_VS_PROG
,
123 key
->program_string_id
);
126 perf_debug(" Didn't find previous compile in the shader cache for "
131 for (unsigned int i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
132 found
|= key_debug(brw
, "Vertex attrib w/a flags",
133 old_key
->gl_attrib_wa_flags
[i
],
134 key
->gl_attrib_wa_flags
[i
]);
137 found
|= key_debug(brw
, "legacy user clipping",
138 old_key
->nr_userclip_plane_consts
,
139 key
->nr_userclip_plane_consts
);
141 found
|= key_debug(brw
, "copy edgeflag",
142 old_key
->copy_edgeflag
, key
->copy_edgeflag
);
143 found
|= key_debug(brw
, "PointCoord replace",
144 old_key
->point_coord_replace
, key
->point_coord_replace
);
145 found
|= key_debug(brw
, "vertex color clamping",
146 old_key
->clamp_vertex_color
, key
->clamp_vertex_color
);
148 found
|= brw_debug_recompile_sampler_key(brw
, &old_key
->tex
, &key
->tex
);
151 perf_debug(" Something else\n");
156 brw_codegen_vs_prog(struct brw_context
*brw
,
157 struct brw_program
*vp
,
158 struct brw_vs_prog_key
*key
)
160 const struct brw_compiler
*compiler
= brw
->screen
->compiler
;
161 const struct gen_device_info
*devinfo
= &brw
->screen
->devinfo
;
163 const GLuint
*program
;
164 struct brw_vs_prog_data prog_data
;
165 struct brw_stage_prog_data
*stage_prog_data
= &prog_data
.base
.base
;
167 bool start_busy
= false;
168 double start_time
= 0;
170 memset(&prog_data
, 0, sizeof(prog_data
));
172 /* Use ALT floating point mode for ARB programs so that 0^0 == 1. */
173 if (vp
->program
.is_arb_asm
)
174 stage_prog_data
->use_alt_mode
= true;
176 mem_ctx
= ralloc_context(NULL
);
178 brw_assign_common_binding_table_offsets(devinfo
, &vp
->program
,
179 &prog_data
.base
.base
, 0);
181 /* Allocate the references to the uniforms that will end up in the
182 * prog_data associated with the compiled program, and which will be freed
183 * by the state cache.
185 int param_count
= vp
->program
.nir
->num_uniforms
/ 4;
187 prog_data
.base
.base
.nr_image_params
= vp
->program
.info
.num_images
;
189 /* vec4_visitor::setup_uniform_clipplane_values() also uploads user clip
190 * planes as uniforms.
192 param_count
+= key
->nr_userclip_plane_consts
* 4;
194 stage_prog_data
->param
=
195 rzalloc_array(NULL
, const gl_constant_value
*, param_count
);
196 stage_prog_data
->pull_param
=
197 rzalloc_array(NULL
, const gl_constant_value
*, param_count
);
198 stage_prog_data
->image_param
=
199 rzalloc_array(NULL
, struct brw_image_param
,
200 stage_prog_data
->nr_image_params
);
201 stage_prog_data
->nr_params
= param_count
;
203 if (!vp
->program
.is_arb_asm
) {
204 brw_nir_setup_glsl_uniforms(vp
->program
.nir
, &vp
->program
,
205 &prog_data
.base
.base
,
206 compiler
->scalar_stage
[MESA_SHADER_VERTEX
]);
207 brw_nir_analyze_ubo_ranges(compiler
, vp
->program
.nir
,
208 prog_data
.base
.base
.ubo_ranges
);
210 brw_nir_setup_arb_uniforms(vp
->program
.nir
, &vp
->program
,
211 &prog_data
.base
.base
);
214 uint64_t outputs_written
=
215 brw_vs_outputs_written(brw
, key
, vp
->program
.nir
->info
.outputs_written
);
217 brw_compute_vue_map(devinfo
,
218 &prog_data
.base
.vue_map
, outputs_written
,
219 vp
->program
.nir
->info
.separate_shader
);
222 _mesa_fprint_program_opt(stderr
, &vp
->program
, PROG_PRINT_DEBUG
, true);
225 if (unlikely(brw
->perf_debug
)) {
226 start_busy
= (brw
->batch
.last_bo
&&
227 brw_bo_busy(brw
->batch
.last_bo
));
228 start_time
= get_time();
231 if (unlikely(INTEL_DEBUG
& DEBUG_VS
)) {
232 if (vp
->program
.is_arb_asm
)
233 brw_dump_arb_asm("vertex", &vp
->program
);
237 if (INTEL_DEBUG
& DEBUG_SHADER_TIME
) {
238 st_index
= brw_get_shader_time_index(brw
, &vp
->program
, ST_VS
,
239 !vp
->program
.is_arb_asm
);
245 program
= brw_compile_vs(compiler
, brw
, mem_ctx
, key
, &prog_data
,
247 brw_select_clip_planes(&brw
->ctx
),
248 !_mesa_is_gles3(&brw
->ctx
),
249 st_index
, &program_size
, &error_str
);
250 if (program
== NULL
) {
251 if (!vp
->program
.is_arb_asm
) {
252 vp
->program
.sh
.data
->LinkStatus
= linking_failure
;
253 ralloc_strcat(&vp
->program
.sh
.data
->InfoLog
, error_str
);
256 _mesa_problem(NULL
, "Failed to compile vertex shader: %s\n", error_str
);
258 ralloc_free(mem_ctx
);
262 if (unlikely(brw
->perf_debug
)) {
263 if (vp
->compiled_once
) {
264 brw_vs_debug_recompile(brw
, &vp
->program
, key
);
266 if (start_busy
&& !brw_bo_busy(brw
->batch
.last_bo
)) {
267 perf_debug("VS compile took %.03f ms and stalled the GPU\n",
268 (get_time() - start_time
) * 1000);
270 vp
->compiled_once
= true;
273 /* Scratch space is used for register spilling */
274 brw_alloc_stage_scratch(brw
, &brw
->vs
.base
,
275 prog_data
.base
.base
.total_scratch
,
276 devinfo
->max_vs_threads
);
278 brw_upload_cache(&brw
->cache
, BRW_CACHE_VS_PROG
,
279 key
, sizeof(struct brw_vs_prog_key
),
280 program
, program_size
,
281 &prog_data
, sizeof(prog_data
),
282 &brw
->vs
.base
.prog_offset
, &brw
->vs
.base
.prog_data
);
283 ralloc_free(mem_ctx
);
289 brw_vs_state_dirty(const struct brw_context
*brw
)
291 return brw_state_dirty(brw
,
298 BRW_NEW_VERTEX_PROGRAM
|
299 BRW_NEW_VS_ATTRIB_WORKAROUNDS
);
303 brw_vs_populate_key(struct brw_context
*brw
,
304 struct brw_vs_prog_key
*key
)
306 struct gl_context
*ctx
= &brw
->ctx
;
307 /* BRW_NEW_VERTEX_PROGRAM */
308 struct gl_program
*prog
= brw
->programs
[MESA_SHADER_VERTEX
];
309 struct brw_program
*vp
= (struct brw_program
*) prog
;
310 const struct gen_device_info
*devinfo
= &brw
->screen
->devinfo
;
312 memset(key
, 0, sizeof(*key
));
314 /* Just upload the program verbatim for now. Always send it all
315 * the inputs it asks for, whether they are varying or not.
317 key
->program_string_id
= vp
->id
;
319 if (ctx
->Transform
.ClipPlanesEnabled
!= 0 &&
320 (ctx
->API
== API_OPENGL_COMPAT
|| ctx
->API
== API_OPENGLES
) &&
321 vp
->program
.info
.clip_distance_array_size
== 0) {
322 key
->nr_userclip_plane_consts
=
323 _mesa_logbase2(ctx
->Transform
.ClipPlanesEnabled
) + 1;
326 if (devinfo
->gen
< 6) {
328 key
->copy_edgeflag
= (ctx
->Polygon
.FrontMode
!= GL_FILL
||
329 ctx
->Polygon
.BackMode
!= GL_FILL
);
332 if (ctx
->Point
.PointSprite
) {
333 key
->point_coord_replace
= ctx
->Point
.CoordReplace
& 0xff;
337 if (prog
->info
.outputs_written
&
338 (VARYING_BIT_COL0
| VARYING_BIT_COL1
| VARYING_BIT_BFC0
|
340 /* _NEW_LIGHT | _NEW_BUFFERS */
341 key
->clamp_vertex_color
= ctx
->Light
._ClampVertexColor
;
345 brw_populate_sampler_prog_key_data(ctx
, prog
, &key
->tex
);
347 /* BRW_NEW_VS_ATTRIB_WORKAROUNDS */
348 if (devinfo
->gen
< 8 && !devinfo
->is_haswell
) {
349 memcpy(key
->gl_attrib_wa_flags
, brw
->vb
.attrib_wa_flags
,
350 sizeof(brw
->vb
.attrib_wa_flags
));
355 brw_upload_vs_prog(struct brw_context
*brw
)
357 struct brw_vs_prog_key key
;
358 /* BRW_NEW_VERTEX_PROGRAM */
359 struct brw_program
*vp
=
360 (struct brw_program
*) brw
->programs
[MESA_SHADER_VERTEX
];
362 if (!brw_vs_state_dirty(brw
))
365 brw_vs_populate_key(brw
, &key
);
367 if (!brw_search_cache(&brw
->cache
, BRW_CACHE_VS_PROG
,
369 &brw
->vs
.base
.prog_offset
, &brw
->vs
.base
.prog_data
)) {
370 bool success
= brw_codegen_vs_prog(brw
, vp
, &key
);
377 brw_vs_precompile(struct gl_context
*ctx
, struct gl_program
*prog
)
379 struct brw_context
*brw
= brw_context(ctx
);
380 struct brw_vs_prog_key key
;
381 uint32_t old_prog_offset
= brw
->vs
.base
.prog_offset
;
382 struct brw_stage_prog_data
*old_prog_data
= brw
->vs
.base
.prog_data
;
385 struct brw_program
*bvp
= brw_program(prog
);
387 memset(&key
, 0, sizeof(key
));
389 brw_setup_tex_for_precompile(brw
, &key
.tex
, prog
);
390 key
.program_string_id
= bvp
->id
;
391 key
.clamp_vertex_color
=
392 (prog
->info
.outputs_written
&
393 (VARYING_BIT_COL0
| VARYING_BIT_COL1
| VARYING_BIT_BFC0
|
396 success
= brw_codegen_vs_prog(brw
, bvp
, &key
);
398 brw
->vs
.base
.prog_offset
= old_prog_offset
;
399 brw
->vs
.base
.prog_data
= old_prog_data
;