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 "shader/prog_print.h"
  38 #include "shader/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    GLcontext *ctx = &brw->intel.ctx;
  47    GLuint program_size;
  48    const GLuint *program;
  49    struct brw_vs_compile c;
  50    int aux_size;
  51
  52    memset(&c, 0, sizeof(c));
  53    memcpy(&c.key, key, sizeof(*key));
  54
  55    brw_init_compile(brw, &c.func);
  56    c.vp = vp;
  57
  58    c.prog_data.outputs_written = vp->program.Base.OutputsWritten;
  59    c.prog_data.inputs_read = vp->program.Base.InputsRead;
  60
  61    if (c.key.copy_edgeflag) {
  62       c.prog_data.outputs_written |= BITFIELD64_BIT(VERT_RESULT_EDGE);
  63       c.prog_data.inputs_read |= 1<<VERT_ATTRIB_EDGEFLAG;
  64    }
  65
  66    if (0)
  67       _mesa_print_program(&c.vp->program.Base);
  68
  69
  70
  71    /* Emit GEN4 code.
  72     */
  73    brw_vs_emit(&c);
  74
  75    /* get the program
  76     */
  77    program = brw_get_program(&c.func, &program_size);
  78
  79    /* We upload from &c.prog_data including the constant_map assuming
  80     * they're packed together.  It would be nice to have a
  81     * compile-time assert macro here.
  82     */
  83    assert(c.constant_map == (int8_t *)&c.prog_data +
  84           sizeof(c.prog_data));
  85    assert(ctx->Const.VertexProgram.MaxNativeParameters ==
  86           ARRAY_SIZE(c.constant_map));
  87
  88    aux_size = sizeof(c.prog_data);
  89    if (c.vp->use_const_buffer)
  90       aux_size += c.vp->program.Base.Parameters->NumParameters;
  91
  92    dri_bo_unreference(brw->vs.prog_bo);
  93    brw->vs.prog_bo = brw_upload_cache_with_auxdata(&brw->cache, BRW_VS_PROG,
  94                                                    &c.key, sizeof(c.key),
  95                                                    NULL, 0,
  96                                                    program, program_size,
  97                                                    &c.prog_data,
  98                                                    aux_size,
  99                                                    &brw->vs.prog_data);
 100 }
 101
 102
 103 static void brw_upload_vs_prog(struct brw_context *brw)
 104 {
 105    GLcontext *ctx = &brw->intel.ctx;
 106    struct brw_vs_prog_key key;
 107    struct brw_vertex_program *vp =
 108       (struct brw_vertex_program *)brw->vertex_program;
 109
 110    memset(&key, 0, sizeof(key));
 111
 112    /* Just upload the program verbatim for now.  Always send it all
 113     * the inputs it asks for, whether they are varying or not.
 114     */
 115    key.program_string_id = vp->id;
 116    key.nr_userclip = brw_count_bits(ctx->Transform.ClipPlanesEnabled);
 117    key.copy_edgeflag = (ctx->Polygon.FrontMode != GL_FILL ||
 118                         ctx->Polygon.BackMode != GL_FILL);
 119
 120    /* Make an early check for the key.
 121     */
 122    dri_bo_unreference(brw->vs.prog_bo);
 123    brw->vs.prog_bo = brw_search_cache(&brw->cache, BRW_VS_PROG,
 124                                       &key, sizeof(key),
 125                                       NULL, 0,
 126                                       &brw->vs.prog_data);
 127    if (brw->vs.prog_bo == NULL)
 128       do_vs_prog(brw, vp, &key);
 129    brw->vs.constant_map = ((int8_t *)brw->vs.prog_data +
 130                            sizeof(*brw->vs.prog_data));
 131 }
 132
 133
 134 /* See brw_vs.c:
 135  */
 136 const struct brw_tracked_state brw_vs_prog = {
 137    .dirty = {
 138       .mesa  = _NEW_TRANSFORM | _NEW_POLYGON,
 139       .brw   = BRW_NEW_VERTEX_PROGRAM,
 140       .cache = 0
 141    },
 142    .prepare = brw_upload_vs_prog
 143 };