src/mesa/drivers/dri/i965/brw_sf_state.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
  34 #include "brw_context.h"
  35 #include "brw_state.h"
  36 #include "brw_defines.h"
  37 #include "main/macros.h"
  38 #include "intel_fbo.h"
  39
  40 static void upload_sf_vp(struct brw_context *brw)
  41 {
  42    GLcontext *ctx = &brw->intel.ctx;
  43    const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
  44    struct brw_sf_viewport sfv;
  45    GLfloat y_scale, y_bias;
  46    const GLboolean render_to_fbo = (ctx->DrawBuffer->Name != 0);
  47    const GLfloat *v = ctx->Viewport._WindowMap.m;
  48
  49    memset(&sfv, 0, sizeof(sfv));
  50
  51    if (render_to_fbo) {
  52       y_scale = 1.0;
  53       y_bias = 0;
  54    }
  55    else {
  56       y_scale = -1.0;
  57       y_bias = ctx->DrawBuffer->Height;
  58    }
  59
  60    /* _NEW_VIEWPORT */
  61
  62    sfv.viewport.m00 = v[MAT_SX];
  63    sfv.viewport.m11 = v[MAT_SY] * y_scale;
  64    sfv.viewport.m22 = v[MAT_SZ] * depth_scale;
  65    sfv.viewport.m30 = v[MAT_TX];
  66    sfv.viewport.m31 = v[MAT_TY] * y_scale + y_bias;
  67    sfv.viewport.m32 = v[MAT_TZ] * depth_scale;
  68
  69    /* _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT
  70     * for DrawBuffer->_[XY]{min,max}
  71     */
  72
  73    /* The scissor only needs to handle the intersection of drawable and
  74     * scissor rect.  Clipping to the boundaries of static shared buffers
  75     * for front/back/depth is covered by looping over cliprects in brw_draw.c.
  76     *
  77     * Note that the hardware's coordinates are inclusive, while Mesa's min is
  78     * inclusive but max is exclusive.
  79     */
  80    if (render_to_fbo) {
  81       /* texmemory: Y=0=bottom */
  82       sfv.scissor.xmin = ctx->DrawBuffer->_Xmin;
  83       sfv.scissor.xmax = ctx->DrawBuffer->_Xmax - 1;
  84       sfv.scissor.ymin = ctx->DrawBuffer->_Ymin;
  85       sfv.scissor.ymax = ctx->DrawBuffer->_Ymax - 1;
  86    }
  87    else {
  88       /* memory: Y=0=top */
  89       sfv.scissor.xmin = ctx->DrawBuffer->_Xmin;
  90       sfv.scissor.xmax = ctx->DrawBuffer->_Xmax - 1;
  91       sfv.scissor.ymin = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymax;
  92       sfv.scissor.ymax = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymin - 1;
  93    }
  94
  95    dri_bo_unreference(brw->sf.vp_bo);
  96    brw->sf.vp_bo = brw_cache_data(&brw->cache, BRW_SF_VP, &sfv, sizeof(sfv),
  97                                   NULL, 0);
  98 }
  99
 100 const struct brw_tracked_state brw_sf_vp = {
 101    .dirty = {
 102       .mesa  = (_NEW_VIEWPORT |
 103                 _NEW_SCISSOR |
 104                 _NEW_BUFFERS),
 105       .brw   = 0,
 106       .cache = 0
 107    },
 108    .prepare = upload_sf_vp
 109 };
 110
 111 struct brw_sf_unit_key {
 112    unsigned int total_grf;
 113    unsigned int urb_entry_read_length;
 114
 115    unsigned int nr_urb_entries, urb_size, sfsize;
 116
 117    GLenum front_face, cull_face, provoking_vertex;
 118    unsigned scissor:1;
 119    unsigned line_smooth:1;
 120    unsigned point_sprite:1;
 121    unsigned point_attenuated:1;
 122    unsigned render_to_fbo:1;
 123    float line_width;
 124    float point_size;
 125 };
 126
 127 static void
 128 sf_unit_populate_key(struct brw_context *brw, struct brw_sf_unit_key *key)
 129 {
 130    GLcontext *ctx = &brw->intel.ctx;
 131    memset(key, 0, sizeof(*key));
 132
 133    /* CACHE_NEW_SF_PROG */
 134    key->total_grf = brw->sf.prog_data->total_grf;
 135    key->urb_entry_read_length = brw->sf.prog_data->urb_read_length;
 136
 137    /* BRW_NEW_URB_FENCE */
 138    key->nr_urb_entries = brw->urb.nr_sf_entries;
 139    key->urb_size = brw->urb.vsize;
 140    key->sfsize = brw->urb.sfsize;
 141
 142    key->scissor = ctx->Scissor.Enabled;
 143    key->front_face = ctx->Polygon.FrontFace;
 144
 145    if (ctx->Polygon.CullFlag)
 146       key->cull_face = ctx->Polygon.CullFaceMode;
 147    else
 148       key->cull_face = GL_NONE;
 149
 150    key->line_width = ctx->Line.Width;
 151    key->line_smooth = ctx->Line.SmoothFlag;
 152
 153    key->point_sprite = ctx->Point.PointSprite;
 154    key->point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 155    key->point_attenuated = ctx->Point._Attenuated;
 156
 157    /* _NEW_LIGHT */
 158    key->provoking_vertex = ctx->Light.ProvokingVertex;
 159
 160    key->render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
 161 }
 162
 163 static dri_bo *
 164 sf_unit_create_from_key(struct brw_context *brw, struct brw_sf_unit_key *key,
 165                         dri_bo **reloc_bufs)
 166 {
 167    struct brw_sf_unit_state sf;
 168    dri_bo *bo;
 169    int chipset_max_threads;
 170    memset(&sf, 0, sizeof(sf));
 171
 172    sf.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
 173    sf.thread0.kernel_start_pointer = brw->sf.prog_bo->offset >> 6; /* reloc */
 174
 175    sf.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
 176
 177    sf.thread3.dispatch_grf_start_reg = 3;
 178
 179    if (BRW_IS_IGDNG(brw))
 180        sf.thread3.urb_entry_read_offset = 3;
 181    else
 182        sf.thread3.urb_entry_read_offset = 1;
 183
 184    sf.thread3.urb_entry_read_length = key->urb_entry_read_length;
 185
 186    sf.thread4.nr_urb_entries = key->nr_urb_entries;
 187    sf.thread4.urb_entry_allocation_size = key->sfsize - 1;
 188
 189    /* Each SF thread produces 1 PUE, and there can be up to 24(Pre-IGDNG) or
 190     * 48(IGDNG) threads
 191     */
 192    if (BRW_IS_IGDNG(brw))
 193       chipset_max_threads = 48;
 194    else
 195       chipset_max_threads = 24;
 196
 197    sf.thread4.max_threads = MIN2(chipset_max_threads, key->nr_urb_entries) - 1;
 198
 199    if (INTEL_DEBUG & DEBUG_SINGLE_THREAD)
 200       sf.thread4.max_threads = 0;
 201
 202    if (INTEL_DEBUG & DEBUG_STATS)
 203       sf.thread4.stats_enable = 1;
 204
 205    /* CACHE_NEW_SF_VP */
 206    sf.sf5.sf_viewport_state_offset = brw->sf.vp_bo->offset >> 5; /* reloc */
 207
 208    sf.sf5.viewport_transform = 1;
 209
 210    /* _NEW_SCISSOR */
 211    if (key->scissor)
 212       sf.sf6.scissor = 1;
 213
 214    /* _NEW_POLYGON */
 215    if (key->front_face == GL_CCW)
 216       sf.sf5.front_winding = BRW_FRONTWINDING_CCW;
 217    else
 218       sf.sf5.front_winding = BRW_FRONTWINDING_CW;
 219
 220    /* The viewport is inverted for rendering to a FBO, and that inverts
 221     * polygon front/back orientation.
 222     */
 223    sf.sf5.front_winding ^= key->render_to_fbo;
 224
 225    switch (key->cull_face) {
 226    case GL_FRONT:
 227       sf.sf6.cull_mode = BRW_CULLMODE_FRONT;
 228       break;
 229    case GL_BACK:
 230       sf.sf6.cull_mode = BRW_CULLMODE_BACK;
 231       break;
 232    case GL_FRONT_AND_BACK:
 233       sf.sf6.cull_mode = BRW_CULLMODE_BOTH;
 234       break;
 235    case GL_NONE:
 236       sf.sf6.cull_mode = BRW_CULLMODE_NONE;
 237       break;
 238    default:
 239       assert(0);
 240       break;
 241    }
 242
 243    /* _NEW_LINE */
 244    /* XXX use ctx->Const.Min/MaxLineWidth here */
 245    sf.sf6.line_width = CLAMP(key->line_width, 1.0, 5.0) * (1<<1);
 246
 247    sf.sf6.line_endcap_aa_region_width = 1;
 248    if (key->line_smooth)
 249       sf.sf6.aa_enable = 1;
 250    else if (sf.sf6.line_width <= 0x2)
 251        sf.sf6.line_width = 0;
 252
 253    /* _NEW_BUFFERS */
 254    key->render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
 255    if (!key->render_to_fbo) {
 256       /* Rendering to an OpenGL window */
 257       sf.sf6.point_rast_rule = BRW_RASTRULE_UPPER_RIGHT;
 258    }
 259    else {
 260       /* If rendering to an FBO, the pixel coordinate system is
 261        * inverted with respect to the normal OpenGL coordinate
 262        * system, so BRW_RASTRULE_LOWER_RIGHT is correct.
 263        * But this value is listed as "Reserved, but not seen as useful"
 264        * in Intel documentation (page 212, "Point Rasterization Rule",
 265        * section 7.4 "SF Pipeline State Summary", of document
 266        * "Intel® 965 Express Chipset Family and Intel® G35 Express
 267        * Chipset Graphics Controller Programmer's Reference Manual,
 268        * Volume 2: 3D/Media", Revision 1.0b as of January 2008,
 269        * available at
 270        *     http://intellinuxgraphics.org/documentation.html
 271        * at the time of this writing).
 272        *
 273        * It does work on at least some devices, if not all;
 274        * if devices that don't support it can be identified,
 275        * the likely failure case is that points are rasterized
 276        * incorrectly, which is no worse than occurs without
 277        * the value, so we're using it here.
 278        */
 279       sf.sf6.point_rast_rule = BRW_RASTRULE_LOWER_RIGHT;
 280    }
 281    /* XXX clamp max depends on AA vs. non-AA */
 282
 283    /* _NEW_POINT */
 284    sf.sf7.sprite_point = key->point_sprite;
 285    sf.sf7.point_size = CLAMP(rint(key->point_size), 1, 255) * (1<<3);
 286    sf.sf7.use_point_size_state = !key->point_attenuated;
 287    sf.sf7.aa_line_distance_mode = 0;
 288
 289    /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons:
 290     */
 291    if (key->provoking_vertex == GL_LAST_VERTEX_CONVENTION) {
 292       sf.sf7.trifan_pv = 2;
 293       sf.sf7.linestrip_pv = 1;
 294       sf.sf7.tristrip_pv = 2;
 295    } else {
 296       sf.sf7.trifan_pv = 1;
 297       sf.sf7.linestrip_pv = 0;
 298       sf.sf7.tristrip_pv = 0;
 299    }
 300    sf.sf7.line_last_pixel_enable = 0;
 301
 302    /* Set bias for OpenGL rasterization rules:
 303     */
 304    sf.sf6.dest_org_vbias = 0x8;
 305    sf.sf6.dest_org_hbias = 0x8;
 306
 307    bo = brw_upload_cache(&brw->cache, BRW_SF_UNIT,
 308                          key, sizeof(*key),
 309                          reloc_bufs, 2,
 310                          &sf, sizeof(sf),
 311                          NULL, NULL);
 312
 313    /* STATE_PREFETCH command description describes this state as being
 314     * something loaded through the GPE (L2 ISC), so it's INSTRUCTION domain.
 315     */
 316    /* Emit SF program relocation */
 317    dri_bo_emit_reloc(bo,
 318                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 319                      sf.thread0.grf_reg_count << 1,
 320                      offsetof(struct brw_sf_unit_state, thread0),
 321                      brw->sf.prog_bo);
 322
 323    /* Emit SF viewport relocation */
 324    dri_bo_emit_reloc(bo,
 325                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 326                      sf.sf5.front_winding | (sf.sf5.viewport_transform << 1),
 327                      offsetof(struct brw_sf_unit_state, sf5),
 328                      brw->sf.vp_bo);
 329
 330    return bo;
 331 }
 332
 333 static void upload_sf_unit( struct brw_context *brw )
 334 {
 335    struct brw_sf_unit_key key;
 336    dri_bo *reloc_bufs[2];
 337
 338    sf_unit_populate_key(brw, &key);
 339
 340    reloc_bufs[0] = brw->sf.prog_bo;
 341    reloc_bufs[1] = brw->sf.vp_bo;
 342
 343    dri_bo_unreference(brw->sf.state_bo);
 344    brw->sf.state_bo = brw_search_cache(&brw->cache, BRW_SF_UNIT,
 345                                        &key, sizeof(key),
 346                                        reloc_bufs, 2,
 347                                        NULL);
 348    if (brw->sf.state_bo == NULL) {
 349       brw->sf.state_bo = sf_unit_create_from_key(brw, &key, reloc_bufs);
 350    }
 351 }
 352
 353 const struct brw_tracked_state brw_sf_unit = {
 354    .dirty = {
 355       .mesa  = (_NEW_POLYGON |
 356                 _NEW_LIGHT |
 357                 _NEW_LINE |
 358                 _NEW_POINT |
 359                 _NEW_SCISSOR |
 360                 _NEW_BUFFERS),
 361       .brw   = BRW_NEW_URB_FENCE,
 362       .cache = (CACHE_NEW_SF_VP |
 363                 CACHE_NEW_SF_PROG)
 364    },
 365    .prepare = upload_sf_unit,
 366 };