src/mesa/drivers/dri/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
  33 #include "glheader.h"
  34 #include "macros.h"
  35 #include "enums.h"
  36
  37 #include "intel_batchbuffer.h"
  38
  39 #include "brw_defines.h"
  40 #include "brw_context.h"
  41 #include "brw_eu.h"
  42 #include "brw_util.h"
  43 #include "brw_sf.h"
  44 #include "brw_state.h"
  45
  46 #define DO_SETUP_BITS ((1<<FRAG_ATTRIB_MAX)-1)
  47
  48 static void compile_sf_prog( struct brw_context *brw,
  49                              struct brw_sf_prog_key *key )
  50 {
  51    struct brw_sf_compile c;
  52    const GLuint *program;
  53    GLuint program_size;
  54    GLuint i, idx;
  55
  56    memset(&c, 0, sizeof(c));
  57
  58    /* Begin the compilation:
  59     */
  60    brw_init_compile(&c.func);
  61
  62    c.key = *key;
  63    c.nr_attrs = brw_count_bits(c.key.attrs);
  64    c.nr_attr_regs = (c.nr_attrs+1)/2;
  65    c.nr_setup_attrs = brw_count_bits(c.key.attrs & DO_SETUP_BITS);
  66    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  67
  68    c.prog_data.urb_read_length = c.nr_attr_regs;
  69    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  70
  71    /* Construct map from attribute number to position in the vertex.
  72     */
  73    for (i = idx = 0; i < VERT_RESULT_MAX; i++)
  74       if (c.key.attrs & (1<<i)) {
  75          c.attr_to_idx[i] = idx;
  76          c.idx_to_attr[idx] = i;
  77          idx++;
  78       }
  79
  80    /* Which primitive?  Or all three?
  81     */
  82    switch (key->primitive) {
  83    case SF_TRIANGLES:
  84       c.nr_verts = 3;
  85       brw_emit_tri_setup( &c );
  86       break;
  87    case SF_LINES:
  88       c.nr_verts = 2;
  89       brw_emit_line_setup( &c );
  90       break;
  91    case SF_POINTS:
  92       c.nr_verts = 1;
  93       brw_emit_point_setup( &c );
  94       break;
  95    case SF_UNFILLED_TRIS:
  96       c.nr_verts = 3;
  97       brw_emit_anyprim_setup( &c );
  98       break;
  99    default:
 100       assert(0);
 101       return;
 102    }
 103
 104
 105    /* get the program
 106     */
 107    program = brw_get_program(&c.func, &program_size);
 108
 109    /* Upload
 110     */
 111    brw->sf.prog_gs_offset = brw_upload_cache( &brw->cache[BRW_SF_PROG],
 112                                               &c.key,
 113                                               sizeof(c.key),
 114                                               program,
 115                                               program_size,
 116                                               &c.prog_data,
 117                                               &brw->sf.prog_data );
 118 }
 119
 120
 121 static GLboolean search_cache( struct brw_context *brw,
 122                                struct brw_sf_prog_key *key )
 123 {
 124    return brw_search_cache(&brw->cache[BRW_SF_PROG],
 125                            key, sizeof(*key),
 126                            &brw->sf.prog_data,
 127                            &brw->sf.prog_gs_offset);
 128 }
 129
 130
 131 /* Calculate interpolants for triangle and line rasterization.
 132  */
 133 static void upload_sf_prog( struct brw_context *brw )
 134 {
 135    struct brw_sf_prog_key key;
 136
 137    memset(&key, 0, sizeof(key));
 138
 139    /* Populate the key, noting state dependencies:
 140     */
 141    /* CACHE_NEW_VS_PROG */
 142    key.attrs = brw->vs.prog_data->outputs_written;
 143
 144    /* BRW_NEW_REDUCED_PRIMITIVE */
 145    switch (brw->intel.reduced_primitive) {
 146    case GL_TRIANGLES:
 147       /* NOTE: We just use the edgeflag attribute as an indicator that
 148        * unfilled triangles are active.  We don't actually do the
 149        * edgeflag testing here, it is already done in the clip
 150        * program.
 151        */
 152       if (key.attrs & (1<<VERT_RESULT_EDGE))
 153          key.primitive = SF_UNFILLED_TRIS;
 154       else
 155          key.primitive = SF_TRIANGLES;
 156       break;
 157    case GL_LINES:
 158       key.primitive = SF_LINES;
 159       break;
 160    case GL_POINTS:
 161       key.primitive = SF_POINTS;
 162       break;
 163    }
 164
 165
 166    /* _NEW_LIGHT */
 167    key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
 168    key.do_twoside_color = (brw->attribs.Light->Enabled && brw->attribs.Light->Model.TwoSide);
 169
 170    /* _NEW_POLYGON */
 171    if (key.do_twoside_color)
 172       key.frontface_ccw = (brw->attribs.Polygon->FrontFace == GL_CCW);
 173
 174
 175    if (!search_cache(brw, &key))
 176       compile_sf_prog( brw, &key );
 177 }
 178
 179
 180 const struct brw_tracked_state brw_sf_prog = {
 181    .dirty = {
 182       .mesa  = (_NEW_LIGHT|_NEW_POLYGON),
 183       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 184       .cache = CACHE_NEW_VS_PROG
 185    },
 186    .update = upload_sf_prog
 187 };
 188