src/mesa/drivers/dri/i965/brw_vs_surface_state.c

   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  */
  44 static void
  45 brw_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
  98 const 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  */
 112 static void
 113 brw_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 static void
 141 brw_upload_vs_surfaces(struct brw_context *brw)
 142 {
 143    struct gl_context *ctx = &brw->intel.ctx;
 144    uint32_t *bind;
 145    int i;
 146    int nr_surfaces = 0;
 147
 148    /* BRW_NEW_VS_CONSTBUF */
 149    if (brw->vs.const_bo) {
 150       nr_surfaces = 1;
 151       brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 152    }
 153
 154    if (nr_surfaces != 0) {
 155       bind = brw_state_batch(brw, AUB_TRACE_SURFACE_STATE,
 156                              sizeof(uint32_t) * nr_surfaces,
 157                              32, &brw->vs.bind_bo_offset);
 158
 159       for (i = 0; i < nr_surfaces; i++) {
 160          /* BRW_NEW_VS_CONSTBUF */
 161          bind[i] = brw->vs.surf_offset[i];
 162       }
 163       brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
 164    } else {
 165       if (brw->vs.bind_bo_offset) {
 166          brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
 167          brw->vs.bind_bo_offset = 0;
 168       }
 169    }
 170 }
 171
 172 const struct brw_tracked_state brw_vs_surfaces = {
 173    .dirty = {
 174       .mesa = 0,
 175       .brw = (BRW_NEW_VS_CONSTBUF |
 176               BRW_NEW_BATCH),
 177       .cache = 0
 178    },
 179    .emit = brw_upload_vs_surfaces,
 180 };