src/mesa/drivers/dri/i965/brw_vs.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
  33 #include "brw_context.h"
  34 #include "brw_vs.h"
  35 #include "brw_util.h"
  36 #include "brw_state.h"
  37 #include "program/prog_print.h"
  38 #include "program/prog_parameter.h"
  39
  40
  41
  42 static void do_vs_prog( struct brw_context *brw,
  43                         struct brw_vertex_program *vp,
  44                         struct brw_vs_prog_key *key )
  45 {
  46    struct gl_context *ctx = &brw->intel.ctx;
  47    GLuint program_size;
  48    const GLuint *program;
  49    struct brw_vs_compile c;
  50    int aux_size;
  51    int i;
  52
  53    memset(&c, 0, sizeof(c));
  54    memcpy(&c.key, key, sizeof(*key));
  55
  56    brw_init_compile(brw, &c.func);
  57    c.vp = vp;
  58
  59    c.prog_data.outputs_written = vp->program.Base.OutputsWritten;
  60    c.prog_data.inputs_read = vp->program.Base.InputsRead;
  61
  62    if (c.key.copy_edgeflag) {
  63       c.prog_data.outputs_written |= BITFIELD64_BIT(VERT_RESULT_EDGE);
  64       c.prog_data.inputs_read |= 1<<VERT_ATTRIB_EDGEFLAG;
  65    }
  66
  67    /* Put dummy slots into the VUE for the SF to put the replaced
  68     * point sprite coords in.  We shouldn't need these dummy slots,
  69     * which take up precious URB space, but it would mean that the SF
  70     * doesn't get nice aligned pairs of input coords into output
  71     * coords, which would be a pain to handle.
  72     */
  73    for (i = 0; i < 8; i++) {
  74       if (c.key.point_coord_replace & (1 << i))
  75          c.prog_data.outputs_written |= BITFIELD64_BIT(VERT_RESULT_TEX0 + i);
  76    }
  77
  78    if (0) {
  79       _mesa_fprint_program_opt(stdout, &c.vp->program.Base, PROG_PRINT_DEBUG,
  80                                GL_TRUE);
  81    }
  82
  83    /* Emit GEN4 code.
  84     */
  85    brw_vs_emit(&c);
  86
  87    /* get the program
  88     */
  89    program = brw_get_program(&c.func, &program_size);
  90
  91    /* We upload from &c.prog_data including the constant_map assuming
  92     * they're packed together.  It would be nice to have a
  93     * compile-time assert macro here.
  94     */
  95    assert(c.constant_map == (int8_t *)&c.prog_data +
  96           sizeof(c.prog_data));
  97    assert(ctx->Const.VertexProgram.MaxNativeParameters ==
  98           ARRAY_SIZE(c.constant_map));
  99    (void) ctx;
 100
 101    aux_size = sizeof(c.prog_data);
 102    /* constant_map */
 103    aux_size += c.vp->program.Base.Parameters->NumParameters;
 104
 105    drm_intel_bo_unreference(brw->vs.prog_bo);
 106    brw->vs.prog_bo = brw_upload_cache(&brw->cache, BRW_VS_PROG,
 107                                       &c.key, sizeof(c.key),
 108                                       program, program_size,
 109                                       &c.prog_data, aux_size,
 110                                       &brw->vs.prog_data);
 111 }
 112
 113
 114 static void brw_upload_vs_prog(struct brw_context *brw)
 115 {
 116    struct gl_context *ctx = &brw->intel.ctx;
 117    struct brw_vs_prog_key key;
 118    struct brw_vertex_program *vp =
 119       (struct brw_vertex_program *)brw->vertex_program;
 120    int i;
 121
 122    memset(&key, 0, sizeof(key));
 123
 124    /* Just upload the program verbatim for now.  Always send it all
 125     * the inputs it asks for, whether they are varying or not.
 126     */
 127    key.program_string_id = vp->id;
 128    key.nr_userclip = brw_count_bits(ctx->Transform.ClipPlanesEnabled);
 129    key.copy_edgeflag = (ctx->Polygon.FrontMode != GL_FILL ||
 130                         ctx->Polygon.BackMode != GL_FILL);
 131    key.two_side_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 132
 133    /* _NEW_LIGHT | _NEW_BUFFERS */
 134    key.clamp_vertex_color = ctx->Light._ClampVertexColor;
 135
 136    /* _NEW_POINT */
 137    if (ctx->Point.PointSprite) {
 138       for (i = 0; i < 8; i++) {
 139          if (ctx->Point.CoordReplace[i])
 140             key.point_coord_replace |= (1 << i);
 141       }
 142    }
 143
 144    /* Make an early check for the key.
 145     */
 146    drm_intel_bo_unreference(brw->vs.prog_bo);
 147    brw->vs.prog_bo = brw_search_cache(&brw->cache, BRW_VS_PROG,
 148                                       &key, sizeof(key),
 149                                       &brw->vs.prog_data);
 150    if (brw->vs.prog_bo == NULL)
 151       do_vs_prog(brw, vp, &key);
 152    brw->vs.constant_map = ((int8_t *)brw->vs.prog_data +
 153                            sizeof(*brw->vs.prog_data));
 154 }
 155
 156
 157 /* See brw_vs.c:
 158  */
 159 const struct brw_tracked_state brw_vs_prog = {
 160    .dirty = {
 161       .mesa  = (_NEW_TRANSFORM | _NEW_POLYGON | _NEW_POINT | _NEW_LIGHT |
 162                 _NEW_BUFFERS),
 163       .brw   = BRW_NEW_VERTEX_PROGRAM,
 164       .cache = 0
 165    },
 166    .prepare = brw_upload_vs_prog
 167 };