brw_vs_surface_state.c revision 0983c6869bead0c31c62e5b1dda7f70898d43971 
1/*
2 Copyright (C) Intel Corp.  2006.  All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
5
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:
13
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.
17
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.
25
26 **********************************************************************/
27 /*
28  * Authors:
29  *   Keith Whitwell <keith@tungstengraphics.com>
30  */
31
32#include "main/mtypes.h"
33#include "program/prog_parameter.h"
34
35#include "brw_context.h"
36#include "brw_state.h"
37
38/* Creates a new VS constant buffer reflecting the current VS program's
39 * constants, if needed by the VS program.
40 *
41 * Otherwise, constants go through the CURBEs using the brw_constant_buffer
42 * state atom.
43 */
44static void
45brw_upload_vs_pull_constants(struct brw_context *brw)
46{
47   struct gl_context *ctx = &brw->intel.ctx;
48   struct intel_context *intel = &brw->intel;
49   /* BRW_NEW_VERTEX_PROGRAM */
50   struct brw_vertex_program *vp =
51      (struct brw_vertex_program *) brw->vertex_program;
52   const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
53   int i;
54
55   if (vp->program.IsNVProgram)
56      _mesa_load_tracked_matrices(ctx);
57
58   /* Updates the ParamaterValues[i] pointers for all parameters of the
59    * basic type of PROGRAM_STATE_VAR.
60    */
61   _mesa_load_state_parameters(&brw->intel.ctx, vp->program.Base.Parameters);
62
63   /* CACHE_NEW_VS_PROG */
64   if (!brw->vs.prog_data->nr_pull_params) {
65      if (brw->vs.const_bo) {
66	 drm_intel_bo_unreference(brw->vs.const_bo);
67	 brw->vs.const_bo = NULL;
68	 brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
69      }
70      return;
71   }
72
73   /* _NEW_PROGRAM_CONSTANTS */
74   drm_intel_bo_unreference(brw->vs.const_bo);
75   brw->vs.const_bo = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer",
76					 brw->vs.prog_data->nr_pull_params * 4,
77					 64);
78
79   drm_intel_gem_bo_map_gtt(brw->vs.const_bo);
80   for (i = 0; i < brw->vs.prog_data->nr_pull_params; i++) {
81      memcpy(brw->vs.const_bo->virtual + i * 4,
82	     brw->vs.prog_data->pull_param[i],
83	     4);
84   }
85
86   if (0) {
87      for (i = 0; i < params->NumParameters; i++) {
88	 float *row = (float *)brw->vs.const_bo->virtual + i * 4;
89	 printf("vs const surface %3d: %4.3f %4.3f %4.3f %4.3f\n",
90		i, row[0], row[1], row[2], row[3]);
91      }
92   }
93
94   drm_intel_gem_bo_unmap_gtt(brw->vs.const_bo);
95   brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
96}
97
98const struct brw_tracked_state brw_vs_constants = {
99   .dirty = {
100      .mesa = (_NEW_PROGRAM_CONSTANTS),
101      .brw = (BRW_NEW_VERTEX_PROGRAM),
102      .cache = CACHE_NEW_VS_PROG,
103   },
104   .emit = brw_upload_vs_pull_constants,
105};
106
107/**
108 * Update the surface state for a VS constant buffer.
109 *
110 * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
111 */
112static void
113brw_update_vs_constant_surface( struct gl_context *ctx,
114                                GLuint surf)
115{
116   struct brw_context *brw = brw_context(ctx);
117   struct intel_context *intel = &brw->intel;
118   struct brw_vertex_program *vp =
119      (struct brw_vertex_program *) brw->vertex_program;
120   const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
121
122   assert(surf == 0);
123
124   /* If there's no constant buffer, then no surface BO is needed to point at
125    * it.
126    */
127   if (brw->vs.const_bo == NULL) {
128      brw->vs.surf_offset[surf] = 0;
129      return;
130   }
131
132   intel->vtbl.create_constant_surface(brw, brw->vs.const_bo,
133				       params->NumParameters,
134				       &brw->vs.surf_offset[surf]);
135}
136
137/**
138 * Vertex shader surfaces (constant buffer).
139 *
140 * This consumes the state updates for the constant buffer needing
141 * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit.
142 */
143static void
144brw_upload_vs_surfaces(struct brw_context *brw)
145{
146   struct gl_context *ctx = &brw->intel.ctx;
147   uint32_t *bind;
148   int i;
149   int nr_surfaces = 0;
150
151   /* BRW_NEW_VS_CONSTBUF */
152   if (brw->vs.const_bo) {
153      nr_surfaces = 1;
154      brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
155   }
156
157   if (nr_surfaces != 0) {
158      bind = brw_state_batch(brw, AUB_TRACE_SURFACE_STATE,
159			     sizeof(uint32_t) * nr_surfaces,
160			     32, &brw->vs.bind_bo_offset);
161
162      for (i = 0; i < nr_surfaces; i++) {
163	 /* BRW_NEW_VS_CONSTBUF */
164	 bind[i] = brw->vs.surf_offset[i];
165      }
166      brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
167   } else {
168      if (brw->vs.bind_bo_offset) {
169	 brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
170	 brw->vs.bind_bo_offset = 0;
171      }
172   }
173
174   if (brw->vs.nr_surfaces != nr_surfaces) {
175      brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
176      brw->vs.nr_surfaces = nr_surfaces;
177   }
178}
179
180const struct brw_tracked_state brw_vs_surfaces = {
181   .dirty = {
182      .mesa = 0,
183      .brw = (BRW_NEW_VS_CONSTBUF |
184	      BRW_NEW_BATCH),
185      .cache = 0
186   },
187   .emit = brw_upload_vs_surfaces,
188};
189