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    if (c.vp->use_const_buffer)
 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_with_auxdata(&brw->cache, BRW_VS_PROG,
 107                                                    &c.key, sizeof(c.key),
 108                                                    NULL, 0,
 109                                                    program, program_size,
 110                                                    &c.prog_data,
 111                                                    aux_size,
 112                                                    &brw->vs.prog_data);
 113 }
 114
 115
 116 static void brw_upload_vs_prog(struct brw_context *brw)
 117 {
 118    struct gl_context *ctx = &brw->intel.ctx;
 119    struct brw_vs_prog_key key;
 120    struct brw_vertex_program *vp =
 121       (struct brw_vertex_program *)brw->vertex_program;
 122    int i;
 123
 124    memset(&key, 0, sizeof(key));
 125
 126    /* Just upload the program verbatim for now.  Always send it all
 127     * the inputs it asks for, whether they are varying or not.
 128     */
 129    key.program_string_id = vp->id;
 130    key.nr_userclip = brw_count_bits(ctx->Transform.ClipPlanesEnabled);
 131    key.copy_edgeflag = (ctx->Polygon.FrontMode != GL_FILL ||
 132                         ctx->Polygon.BackMode != GL_FILL);
 133
 134    /* _NEW_POINT */
 135    if (ctx->Point.PointSprite) {
 136       for (i = 0; i < 8; i++) {
 137          if (ctx->Point.CoordReplace[i])
 138             key.point_coord_replace |= (1 << i);
 139       }
 140    }
 141
 142    /* Make an early check for the key.
 143     */
 144    drm_intel_bo_unreference(brw->vs.prog_bo);
 145    brw->vs.prog_bo = brw_search_cache(&brw->cache, BRW_VS_PROG,
 146                                       &key, sizeof(key),
 147                                       NULL, 0,
 148                                       &brw->vs.prog_data);
 149    if (brw->vs.prog_bo == NULL)
 150       do_vs_prog(brw, vp, &key);
 151    brw->vs.constant_map = ((int8_t *)brw->vs.prog_data +
 152                            sizeof(*brw->vs.prog_data));
 153 }
 154
 155
 156 /* See brw_vs.c:
 157  */
 158 const struct brw_tracked_state brw_vs_prog = {
 159    .dirty = {
 160       .mesa  = _NEW_TRANSFORM | _NEW_POLYGON | _NEW_POINT,
 161       .brw   = BRW_NEW_VERTEX_PROGRAM,
 162       .cache = 0
 163    },
 164    .prepare = brw_upload_vs_prog
 165 };