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 "main/compiler.h"
  34 #include "brw_context.h"
  35 #include "brw_vs.h"
  36 #include "brw_util.h"
  37 #include "brw_state.h"
  38 #include "program/prog_print.h"
  39 #include "program/prog_parameter.h"
  40
  41 #include "../glsl/ralloc.h"
  42
  43 static void do_vs_prog( struct brw_context *brw,
  44                         struct brw_vertex_program *vp,
  45                         struct brw_vs_prog_key *key )
  46 {
  47    struct gl_context *ctx = &brw->intel.ctx;
  48    GLuint program_size;
  49    const GLuint *program;
  50    struct brw_vs_compile c;
  51    void *mem_ctx;
  52    int aux_size;
  53    int i;
  54    static int new_vs = -1;
  55
  56    memset(&c, 0, sizeof(c));
  57    memcpy(&c.key, key, sizeof(*key));
  58
  59    mem_ctx = ralloc_context(NULL);
  60
  61    brw_init_compile(brw, &c.func, mem_ctx);
  62    c.vp = vp;
  63
  64    c.prog_data.outputs_written = vp->program.Base.OutputsWritten;
  65    c.prog_data.inputs_read = vp->program.Base.InputsRead;
  66
  67    if (c.key.copy_edgeflag) {
  68       c.prog_data.outputs_written |= BITFIELD64_BIT(VERT_RESULT_EDGE);
  69       c.prog_data.inputs_read |= 1<<VERT_ATTRIB_EDGEFLAG;
  70    }
  71
  72    /* Put dummy slots into the VUE for the SF to put the replaced
  73     * point sprite coords in.  We shouldn't need these dummy slots,
  74     * which take up precious URB space, but it would mean that the SF
  75     * doesn't get nice aligned pairs of input coords into output
  76     * coords, which would be a pain to handle.
  77     */
  78    for (i = 0; i < 8; i++) {
  79       if (c.key.point_coord_replace & (1 << i))
  80          c.prog_data.outputs_written |= BITFIELD64_BIT(VERT_RESULT_TEX0 + i);
  81    }
  82
  83    if (0) {
  84       _mesa_fprint_program_opt(stdout, &c.vp->program.Base, PROG_PRINT_DEBUG,
  85                                GL_TRUE);
  86    }
  87
  88    /* Emit GEN4 code.
  89     */
  90    if (new_vs == -1)
  91       new_vs = getenv("INTEL_NEW_VS") != NULL;
  92
  93    if (new_vs) {
  94       if (!brw_vs_emit(&c))
  95          brw_old_vs_emit(&c);
  96    } else {
  97       brw_old_vs_emit(&c);
  98    }
  99
 100    /* get the program
 101     */
 102    program = brw_get_program(&c.func, &program_size);
 103
 104    /* We upload from &c.prog_data including the constant_map assuming
 105     * they're packed together.  It would be nice to have a
 106     * compile-time assert macro here.
 107     */
 108    assert(c.constant_map == (int8_t *)&c.prog_data +
 109           sizeof(c.prog_data));
 110    assert(ctx->Const.VertexProgram.MaxNativeParameters ==
 111           ARRAY_SIZE(c.constant_map));
 112    (void) ctx;
 113
 114    aux_size = sizeof(c.prog_data);
 115    /* constant_map */
 116    aux_size += c.vp->program.Base.Parameters->NumParameters;
 117
 118    brw_upload_cache(&brw->cache, BRW_VS_PROG,
 119                     &c.key, sizeof(c.key),
 120                     program, program_size,
 121                     &c.prog_data, aux_size,
 122                     &brw->vs.prog_offset, &brw->vs.prog_data);
 123    ralloc_free(mem_ctx);
 124 }
 125
 126
 127 static void brw_upload_vs_prog(struct brw_context *brw)
 128 {
 129    struct gl_context *ctx = &brw->intel.ctx;
 130    struct brw_vs_prog_key key;
 131    struct brw_vertex_program *vp =
 132       (struct brw_vertex_program *)brw->vertex_program;
 133    int i;
 134
 135    memset(&key, 0, sizeof(key));
 136
 137    /* Just upload the program verbatim for now.  Always send it all
 138     * the inputs it asks for, whether they are varying or not.
 139     */
 140    key.program_string_id = vp->id;
 141    key.nr_userclip = brw_count_bits(ctx->Transform.ClipPlanesEnabled);
 142    key.copy_edgeflag = (ctx->Polygon.FrontMode != GL_FILL ||
 143                         ctx->Polygon.BackMode != GL_FILL);
 144    key.two_side_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 145
 146    /* _NEW_LIGHT | _NEW_BUFFERS */
 147    key.clamp_vertex_color = ctx->Light._ClampVertexColor;
 148
 149    /* _NEW_POINT */
 150    if (ctx->Point.PointSprite) {
 151       for (i = 0; i < 8; i++) {
 152          if (ctx->Point.CoordReplace[i])
 153             key.point_coord_replace |= (1 << i);
 154       }
 155    }
 156
 157    /* BRW_NEW_VERTICES */
 158    for (i = 0; i < VERT_ATTRIB_MAX; i++) {
 159       if (vp->program.Base.InputsRead & (1 << i) &&
 160           brw->vb.inputs[i].glarray->Type == GL_FIXED) {
 161          key.gl_fixed_input_size[i] = brw->vb.inputs[i].glarray->Size;
 162       }
 163    }
 164
 165    if (!brw_search_cache(&brw->cache, BRW_VS_PROG,
 166                          &key, sizeof(key),
 167                          &brw->vs.prog_offset, &brw->vs.prog_data)) {
 168       do_vs_prog(brw, vp, &key);
 169    }
 170    brw->vs.constant_map = ((int8_t *)brw->vs.prog_data +
 171                            sizeof(*brw->vs.prog_data));
 172 }
 173
 174
 175 /* See brw_vs.c:
 176  */
 177 const struct brw_tracked_state brw_vs_prog = {
 178    .dirty = {
 179       .mesa  = (_NEW_TRANSFORM | _NEW_POLYGON | _NEW_POINT | _NEW_LIGHT |
 180                 _NEW_BUFFERS),
 181       .brw   = (BRW_NEW_VERTEX_PROGRAM |
 182                 BRW_NEW_VERTICES),
 183       .cache = 0
 184    },
 185    .prepare = brw_upload_vs_prog
 186 };