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 "main/texstore.h"
  34 #include "program/prog_parameter.h"
  35
  36 #include "brw_context.h"
  37 #include "brw_state.h"
  38
  39 /* Creates a new VS constant buffer reflecting the current VS program's
  40  * constants, if needed by the VS program.
  41  *
  42  * Otherwise, constants go through the CURBEs using the brw_constant_buffer
  43  * state atom.
  44  */
  45 static void
  46 prepare_vs_constants(struct brw_context *brw)
  47 {
  48    struct gl_context *ctx = &brw->intel.ctx;
  49    struct intel_context *intel = &brw->intel;
  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    const int size = params->NumParameters * 4 * sizeof(GLfloat);
  54    int i;
  55
  56    if (vp->program.IsNVProgram)
  57       _mesa_load_tracked_matrices(ctx);
  58
  59    /* Updates the ParamaterValues[i] pointers for all parameters of the
  60     * basic type of PROGRAM_STATE_VAR.
  61     */
  62    _mesa_load_state_parameters(&brw->intel.ctx, vp->program.Base.Parameters);
  63
  64    /* BRW_NEW_VERTEX_PROGRAM */
  65    if (!vp->use_const_buffer) {
  66       if (brw->vs.const_bo) {
  67          drm_intel_bo_unreference(brw->vs.const_bo);
  68          brw->vs.const_bo = NULL;
  69          brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
  70       }
  71       return;
  72    }
  73
  74    /* _NEW_PROGRAM_CONSTANTS */
  75    drm_intel_bo_unreference(brw->vs.const_bo);
  76    brw->vs.const_bo = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer",
  77                                          size, 64);
  78
  79    drm_intel_gem_bo_map_gtt(brw->vs.const_bo);
  80    for (i = 0; i < params->NumParameters; i++) {
  81       memcpy(brw->vs.const_bo->virtual + i * 4 * sizeof(float),
  82              params->ParameterValues[i],
  83              4 * sizeof(float));
  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 = 0
 103    },
 104    .prepare = prepare_vs_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 brw_vertex_program *vp =
 118       (struct brw_vertex_program *) brw->vertex_program;
 119    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
 120
 121    assert(surf == 0);
 122
 123    /* If there's no constant buffer, then no surface BO is needed to point at
 124     * it.
 125     */
 126    if (brw->vs.const_bo == NULL) {
 127       brw->vs.surf_offset[surf] = 0;
 128       return;
 129    }
 130
 131    brw_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
 132                                &brw->vs.surf_offset[surf]);
 133 }
 134
 135
 136 static void
 137 prepare_vs_surfaces(struct brw_context *brw)
 138 {
 139    int nr_surfaces = 0;
 140
 141    if (brw->vs.const_bo) {
 142       brw_add_validated_bo(brw, brw->vs.const_bo);
 143       nr_surfaces = 1;
 144    }
 145
 146    if (brw->vs.nr_surfaces != nr_surfaces) {
 147       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 148       brw->vs.nr_surfaces = nr_surfaces;
 149    }
 150 }
 151
 152 /**
 153  * Vertex shader surfaces (constant buffer).
 154  *
 155  * This consumes the state updates for the constant buffer needing
 156  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 157  * CACHE_NEW_SURF_BIND for the binding table upload.
 158  */
 159 static void upload_vs_surfaces(struct brw_context *brw)
 160 {
 161    struct gl_context *ctx = &brw->intel.ctx;
 162    uint32_t *bind;
 163    int i;
 164
 165    /* BRW_NEW_NR_VS_SURFACES */
 166    if (brw->vs.nr_surfaces == 0) {
 167       if (brw->vs.bind_bo_offset) {
 168          brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
 169       }
 170       brw->vs.bind_bo_offset = 0;
 171       return;
 172    }
 173
 174    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 175
 176    /* Might want to calculate nr_surfaces first, to avoid taking up so much
 177     * space for the binding table. (once we have vs samplers)
 178     */
 179    bind = brw_state_batch(brw, sizeof(uint32_t) * BRW_VS_MAX_SURF,
 180                           32, &brw->vs.bind_bo_offset);
 181
 182    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 183       /* BRW_NEW_VS_CONSTBUF */
 184       bind[i] = brw->vs.surf_offset[i];
 185    }
 186
 187    brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
 188 }
 189
 190 const struct brw_tracked_state brw_vs_surfaces = {
 191    .dirty = {
 192       .mesa = 0,
 193       .brw = (BRW_NEW_VS_CONSTBUF |
 194               BRW_NEW_NR_VS_SURFACES |
 195               BRW_NEW_BATCH),
 196       .cache = 0
 197    },
 198    .prepare = prepare_vs_surfaces,
 199    .emit = upload_vs_surfaces,
 200 };