src/gallium/drivers/i965/brw_sf.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 "pipe/p_state.h"
  33
  34 #include "brw_batchbuffer.h"
  35 #include "brw_defines.h"
  36 #include "brw_context.h"
  37 #include "brw_pipe_rast.h"
  38 #include "brw_eu.h"
  39 #include "brw_util.h"
  40 #include "brw_sf.h"
  41 #include "brw_state.h"
  42
  43 static enum pipe_error compile_sf_prog( struct brw_context *brw,
  44                                         struct brw_sf_prog_key *key,
  45                                         struct brw_winsys_buffer **bo_out )
  46 {
  47    enum pipe_error ret;
  48    struct brw_sf_compile c;
  49    const GLuint *program;
  50    GLuint program_size;
  51
  52    memset(&c, 0, sizeof(c));
  53
  54    /* Begin the compilation:
  55     */
  56    brw_init_compile(brw, &c.func);
  57
  58    c.key = *key;
  59    c.nr_attrs = c.key.nr_attrs;
  60    c.nr_attr_regs = (c.nr_attrs+1)/2;
  61    c.nr_setup_attrs = c.key.nr_attrs;
  62    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  63
  64    c.prog_data.urb_read_length = c.nr_attr_regs;
  65    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  66
  67
  68    /* Which primitive?  Or all three?
  69     */
  70    switch (key->primitive) {
  71    case SF_TRIANGLES:
  72       c.nr_verts = 3;
  73       brw_emit_tri_setup( &c, GL_TRUE );
  74       break;
  75    case SF_LINES:
  76       c.nr_verts = 2;
  77       brw_emit_line_setup( &c, GL_TRUE );
  78       break;
  79    case SF_POINTS:
  80       c.nr_verts = 1;
  81       if (key->do_point_sprite)
  82           brw_emit_point_sprite_setup( &c, GL_TRUE );
  83       else
  84           brw_emit_point_setup( &c, GL_TRUE );
  85       break;
  86    case SF_UNFILLED_TRIS:
  87       c.nr_verts = 3;
  88       brw_emit_anyprim_setup( &c );
  89       break;
  90    default:
  91       assert(0);
  92       return PIPE_ERROR_BAD_INPUT;
  93    }
  94
  95    /* get the program
  96     */
  97    ret = brw_get_program(&c.func, &program, &program_size);
  98    if (ret)
  99       return ret;
 100
 101    /* Upload
 102     */
 103    ret = brw_upload_cache( &brw->cache, BRW_SF_PROG,
 104                            &c.key, sizeof(c.key),
 105                            NULL, 0,
 106                            program, program_size,
 107                            &c.prog_data,
 108                            &brw->sf.prog_data,
 109                            bo_out);
 110    if (ret)
 111       return ret;
 112
 113    return PIPE_OK;
 114 }
 115
 116 /* Calculate interpolants for triangle and line rasterization.
 117  */
 118 static enum pipe_error upload_sf_prog(struct brw_context *brw)
 119 {
 120    enum pipe_error ret;
 121    struct brw_sf_prog_key key;
 122
 123    memset(&key, 0, sizeof(key));
 124
 125    /* Populate the key, noting state dependencies:
 126     */
 127
 128    /* XXX: Add one to account for the position input.
 129     */
 130    /* PIPE_NEW_FRAGMENT_SIGNATURE */
 131    key.nr_attrs = brw->curr.fragment_shader->signature.nr_inputs + 1;
 132
 133
 134    /* XXX: this is probably where the mapping between vertex shader
 135     * outputs and fragment shader inputs should be handled.  Assume
 136     * for now 1:1 correspondance.
 137     *
 138     * XXX: scan frag shader inputs to work out linear vs. perspective
 139     * interpolation below.
 140     *
 141     * XXX: as long as we're hard-wiring, is eg. position required to
 142     * be linear?
 143     */
 144    //key.linear_attrs = 0;
 145    //key.persp_attrs = (1 << key.nr_attrs) - 1;
 146
 147    key.linear_attrs = (1 << key.nr_attrs) - 1;
 148    key.persp_attrs = 0;
 149
 150    /* BRW_NEW_REDUCED_PRIMITIVE */
 151    switch (brw->reduced_primitive) {
 152    case PIPE_PRIM_TRIANGLES:
 153       /* PIPE_NEW_RAST
 154        */
 155       if (brw->curr.rast->templ.fill_cw != PIPE_POLYGON_MODE_FILL ||
 156           brw->curr.rast->templ.fill_ccw != PIPE_POLYGON_MODE_FILL)
 157          key.primitive = SF_UNFILLED_TRIS;
 158       else
 159          key.primitive = SF_TRIANGLES;
 160       break;
 161    case PIPE_PRIM_LINES:
 162       key.primitive = SF_LINES;
 163       break;
 164    case PIPE_PRIM_POINTS:
 165       key.primitive = SF_POINTS;
 166       break;
 167    }
 168
 169    key.do_point_sprite = brw->curr.rast->templ.point_sprite;
 170    key.sprite_origin_lower_left = 0; /* XXX: ctx->Point.SpriteOrigin - fix rast state */
 171    key.do_flat_shading = brw->curr.rast->templ.flatshade;
 172    key.do_twoside_color = brw->curr.rast->templ.light_twoside;
 173
 174    if (key.do_twoside_color) {
 175       key.frontface_ccw = (brw->curr.rast->templ.front_winding ==
 176                            PIPE_WINDING_CCW);
 177    }
 178
 179    if (brw_search_cache(&brw->cache, BRW_SF_PROG,
 180                         &key, sizeof(key),
 181                         NULL, 0,
 182                         &brw->sf.prog_data,
 183                         &brw->sf.prog_bo))
 184       return PIPE_OK;
 185
 186    ret = compile_sf_prog( brw, &key, &brw->sf.prog_bo );
 187    if (ret)
 188       return ret;
 189
 190    return PIPE_OK;
 191 }
 192
 193
 194 const struct brw_tracked_state brw_sf_prog = {
 195    .dirty = {
 196       .mesa  = (PIPE_NEW_RAST | PIPE_NEW_FRAGMENT_SIGNATURE),
 197       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 198       .cache = 0
 199    },
 200    .prepare = upload_sf_prog
 201 };
 202