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 "main/glheader.h"
  34 #include "main/macros.h"
  35 #include "main/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 #include "../glsl/ralloc.h"
  47
  48 static void compile_sf_prog( struct brw_context *brw,
  49                              struct brw_sf_prog_key *key )
  50 {
  51    struct intel_context *intel = &brw->intel;
  52    struct brw_sf_compile c;
  53    const GLuint *program;
  54    void *mem_ctx;
  55    GLuint program_size;
  56    GLuint i, idx;
  57
  58    memset(&c, 0, sizeof(c));
  59
  60    mem_ctx = ralloc_context(NULL);
  61    /* Begin the compilation:
  62     */
  63    brw_init_compile(brw, &c.func, mem_ctx);
  64
  65    c.key = *key;
  66    c.nr_attrs = brw_count_bits(c.key.attrs);
  67    c.nr_attr_regs = (c.nr_attrs+1)/2;
  68    c.nr_setup_attrs = brw_count_bits(c.key.attrs);
  69    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  70
  71    c.prog_data.urb_read_length = c.nr_attr_regs;
  72    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  73
  74    /* Construct map from attribute number to position in the vertex.
  75     */
  76    for (i = idx = 0; i < VERT_RESULT_MAX; i++) {
  77       if (c.key.attrs & BITFIELD64_BIT(i)) {
  78          c.attr_to_idx[i] = idx;
  79          c.idx_to_attr[idx] = i;
  80          idx++;
  81       }
  82    }
  83
  84    /* Which primitive?  Or all three?
  85     */
  86    switch (key->primitive) {
  87    case SF_TRIANGLES:
  88       c.nr_verts = 3;
  89       brw_emit_tri_setup( &c, GL_TRUE );
  90       break;
  91    case SF_LINES:
  92       c.nr_verts = 2;
  93       brw_emit_line_setup( &c, GL_TRUE );
  94       break;
  95    case SF_POINTS:
  96       c.nr_verts = 1;
  97       if (key->do_point_sprite)
  98           brw_emit_point_sprite_setup( &c, GL_TRUE );
  99       else
 100           brw_emit_point_setup( &c, GL_TRUE );
 101       break;
 102    case SF_UNFILLED_TRIS:
 103       c.nr_verts = 3;
 104       brw_emit_anyprim_setup( &c );
 105       break;
 106    default:
 107       assert(0);
 108       return;
 109    }
 110
 111    /* get the program
 112     */
 113    program = brw_get_program(&c.func, &program_size);
 114
 115    if (unlikely(INTEL_DEBUG & DEBUG_SF)) {
 116       printf("sf:\n");
 117       for (i = 0; i < program_size / sizeof(struct brw_instruction); i++)
 118          brw_disasm(stdout, &((struct brw_instruction *)program)[i],
 119                     intel->gen);
 120       printf("\n");
 121    }
 122
 123    brw_upload_cache(&brw->cache, BRW_SF_PROG,
 124                     &c.key, sizeof(c.key),
 125                     program, program_size,
 126                     &c.prog_data, sizeof(c.prog_data),
 127                     &brw->sf.prog_offset, &brw->sf.prog_data);
 128    ralloc_free(mem_ctx);
 129 }
 130
 131 /* Calculate interpolants for triangle and line rasterization.
 132  */
 133 static void upload_sf_prog(struct brw_context *brw)
 134 {
 135    struct gl_context *ctx = &brw->intel.ctx;
 136    struct brw_sf_prog_key key;
 137
 138    memset(&key, 0, sizeof(key));
 139
 140    /* Populate the key, noting state dependencies:
 141     */
 142    /* CACHE_NEW_VS_PROG */
 143    key.attrs = brw->vs.prog_data->outputs_written;
 144
 145    /* BRW_NEW_REDUCED_PRIMITIVE */
 146    switch (brw->intel.reduced_primitive) {
 147    case GL_TRIANGLES:
 148       /* NOTE: We just use the edgeflag attribute as an indicator that
 149        * unfilled triangles are active.  We don't actually do the
 150        * edgeflag testing here, it is already done in the clip
 151        * program.
 152        */
 153       if (key.attrs & BITFIELD64_BIT(VERT_RESULT_EDGE))
 154          key.primitive = SF_UNFILLED_TRIS;
 155       else
 156          key.primitive = SF_TRIANGLES;
 157       break;
 158    case GL_LINES:
 159       key.primitive = SF_LINES;
 160       break;
 161    case GL_POINTS:
 162       key.primitive = SF_POINTS;
 163       break;
 164    }
 165
 166    /* _NEW_POINT */
 167    key.do_point_sprite = ctx->Point.PointSprite;
 168    if (key.do_point_sprite) {
 169       int i;
 170
 171       for (i = 0; i < 8; i++) {
 172          if (ctx->Point.CoordReplace[i])
 173             key.point_sprite_coord_replace |= (1 << i);
 174       }
 175    }
 176    key.sprite_origin_lower_left = (ctx->Point.SpriteOrigin == GL_LOWER_LEFT);
 177    /* _NEW_LIGHT */
 178    key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
 179    key.do_twoside_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 180
 181    /* _NEW_POLYGON */
 182    if (key.do_twoside_color) {
 183       /* If we're rendering to a FBO, we have to invert the polygon
 184        * face orientation, just as we invert the viewport in
 185        * sf_unit_create_from_key().  ctx->DrawBuffer->Name will be
 186        * nonzero if we're rendering to such an FBO.
 187        */
 188       key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW) ^ (ctx->DrawBuffer->Name != 0);
 189    }
 190
 191    if (!brw_search_cache(&brw->cache, BRW_SF_PROG,
 192                          &key, sizeof(key),
 193                          &brw->sf.prog_offset, &brw->sf.prog_data)) {
 194       compile_sf_prog( brw, &key );
 195    }
 196 }
 197
 198
 199 const struct brw_tracked_state brw_sf_prog = {
 200    .dirty = {
 201       .mesa  = (_NEW_HINT | _NEW_LIGHT | _NEW_POLYGON | _NEW_POINT),
 202       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 203       .cache = CACHE_NEW_VS_PROG
 204    },
 205    .prepare = upload_sf_prog
 206 };
 207