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 "shader/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    GLcontext *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    drm_intel_gem_bo_unmap_gtt(brw->vs.const_bo);
  86    brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
  87 }
  88
  89 const struct brw_tracked_state brw_vs_constants = {
  90    .dirty = {
  91       .mesa = (_NEW_PROGRAM_CONSTANTS),
  92       .brw = (BRW_NEW_VERTEX_PROGRAM),
  93       .cache = 0
  94    },
  95    .prepare = prepare_vs_constants,
  96 };
  97
  98 /**
  99  * Update the surface state for a VS constant buffer.
 100  *
 101  * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
 102  */
 103 static void
 104 brw_update_vs_constant_surface( GLcontext *ctx,
 105                                 GLuint surf)
 106 {
 107    struct brw_context *brw = brw_context(ctx);
 108    struct brw_surface_key key;
 109    struct brw_vertex_program *vp =
 110       (struct brw_vertex_program *) brw->vertex_program;
 111    const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
 112
 113    assert(surf == 0);
 114
 115    /* If there's no constant buffer, then no surface BO is needed to point at
 116     * it.
 117     */
 118    if (brw->vs.const_bo == NULL) {
 119       drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
 120       brw->vs.surf_bo[surf] = NULL;
 121       return;
 122    }
 123
 124    memset(&key, 0, sizeof(key));
 125
 126    key.format = MESA_FORMAT_RGBA_FLOAT32;
 127    key.internal_format = GL_RGBA;
 128    key.bo = brw->vs.const_bo;
 129    key.depthmode = GL_NONE;
 130    key.pitch = params->NumParameters;
 131    key.width = params->NumParameters;
 132    key.height = 1;
 133    key.depth = 1;
 134    key.cpp = 16;
 135
 136    /*
 137    printf("%s:\n", __FUNCTION__);
 138    printf("  width %d  height %d  depth %d  cpp %d  pitch %d\n",
 139           key.width, key.height, key.depth, key.cpp, key.pitch);
 140    */
 141
 142    brw_create_constant_surface(brw, &key, &brw->vs.surf_bo[surf],
 143                                &brw->vs.surf_offset[surf]);
 144 }
 145
 146
 147 static void
 148 prepare_vs_surfaces(struct brw_context *brw)
 149 {
 150    int nr_surfaces = 0;
 151
 152    if (brw->vs.const_bo) {
 153       brw_add_validated_bo(brw, brw->vs.const_bo);
 154       nr_surfaces = 1;
 155    }
 156
 157    if (brw->vs.nr_surfaces != nr_surfaces) {
 158       brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
 159       brw->vs.nr_surfaces = nr_surfaces;
 160    }
 161 }
 162
 163 /**
 164  * Vertex shader surfaces (constant buffer).
 165  *
 166  * This consumes the state updates for the constant buffer needing
 167  * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
 168  * CACHE_NEW_SURF_BIND for the binding table upload.
 169  */
 170 static void upload_vs_surfaces(struct brw_context *brw)
 171 {
 172    GLcontext *ctx = &brw->intel.ctx;
 173    uint32_t *bind;
 174    int i;
 175
 176    /* BRW_NEW_NR_VS_SURFACES */
 177    if (brw->vs.nr_surfaces == 0) {
 178       if (brw->vs.bind_bo) {
 179          drm_intel_bo_unreference(brw->vs.bind_bo);
 180          brw->vs.bind_bo = NULL;
 181          brw->state.dirty.brw |= BRW_NEW_BINDING_TABLE;
 182       }
 183       return;
 184    }
 185
 186    brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
 187
 188    /* Might want to calculate nr_surfaces first, to avoid taking up so much
 189     * space for the binding table. (once we have vs samplers)
 190     */
 191    bind = brw_state_batch(brw, sizeof(uint32_t) * BRW_VS_MAX_SURF,
 192                           32, &brw->vs.bind_bo, &brw->vs.bind_bo_offset);
 193
 194    for (i = 0; i < BRW_VS_MAX_SURF; i++) {
 195       /* BRW_NEW_VS_CONSTBUF */
 196       if (brw->vs.surf_bo[i]) {
 197          bind[i] = brw->vs.surf_offset[i];
 198       } else {
 199          bind[i] = 0;
 200       }
 201    }
 202
 203    brw->state.dirty.brw |= BRW_NEW_BINDING_TABLE;
 204 }
 205
 206 const struct brw_tracked_state brw_vs_surfaces = {
 207    .dirty = {
 208       .mesa = 0,
 209       .brw = (BRW_NEW_VS_CONSTBUF |
 210               BRW_NEW_NR_VS_SURFACES |
 211               BRW_NEW_BATCH),
 212       .cache = 0
 213    },
 214    .prepare = prepare_vs_surfaces,
 215    .emit = upload_vs_surfaces,
 216 };