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