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, NULL, 0 );
  97 }
  98
  99 const struct brw_tracked_state brw_sf_vp = {
 100    .dirty = {
 101       .mesa  = (_NEW_VIEWPORT |
 102                 _NEW_SCISSOR |
 103                 _NEW_BUFFERS),
 104       .brw   = 0,
 105       .cache = 0
 106    },
 107    .prepare = upload_sf_vp
 108 };
 109
 110 struct brw_sf_unit_key {
 111    unsigned int total_grf;
 112    unsigned int urb_entry_read_length;
 113
 114    unsigned int nr_urb_entries, urb_size, sfsize;
 115
 116    GLenum front_face, cull_face;
 117    unsigned scissor:1;
 118    unsigned line_smooth:1;
 119    unsigned point_sprite:1;
 120    unsigned point_attenuated:1;
 121    unsigned render_to_fbo:1;
 122    float line_width;
 123    float point_size;
 124 };
 125
 126 static void
 127 sf_unit_populate_key(struct brw_context *brw, struct brw_sf_unit_key *key)
 128 {
 129    GLcontext *ctx = &brw->intel.ctx;
 130    memset(key, 0, sizeof(*key));
 131
 132    /* CACHE_NEW_SF_PROG */
 133    key->total_grf = brw->sf.prog_data->total_grf;
 134    key->urb_entry_read_length = brw->sf.prog_data->urb_read_length;
 135
 136    /* BRW_NEW_URB_FENCE */
 137    key->nr_urb_entries = brw->urb.nr_sf_entries;
 138    key->urb_size = brw->urb.vsize;
 139    key->sfsize = brw->urb.sfsize;
 140
 141    key->scissor = ctx->Scissor.Enabled;
 142    key->front_face = ctx->Polygon.FrontFace;
 143
 144    if (ctx->Polygon.CullFlag)
 145       key->cull_face = ctx->Polygon.CullFaceMode;
 146    else
 147       key->cull_face = GL_NONE;
 148
 149    key->line_width = ctx->Line.Width;
 150    key->line_smooth = ctx->Line.SmoothFlag;
 151
 152    key->point_sprite = ctx->Point.PointSprite;
 153    key->point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 154    key->point_attenuated = ctx->Point._Attenuated;
 155
 156    key->render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
 157 }
 158
 159 static dri_bo *
 160 sf_unit_create_from_key(struct brw_context *brw, struct brw_sf_unit_key *key,
 161                         dri_bo **reloc_bufs)
 162 {
 163    struct brw_sf_unit_state sf;
 164    dri_bo *bo;
 165    int chipset_max_threads;
 166    memset(&sf, 0, sizeof(sf));
 167
 168    sf.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
 169    sf.thread0.kernel_start_pointer = brw->sf.prog_bo->offset >> 6; /* reloc */
 170
 171    sf.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
 172
 173    sf.thread3.dispatch_grf_start_reg = 3;
 174
 175    if (BRW_IS_IGDNG(brw))
 176        sf.thread3.urb_entry_read_offset = 3;
 177    else
 178        sf.thread3.urb_entry_read_offset = 1;
 179
 180    sf.thread3.urb_entry_read_length = key->urb_entry_read_length;
 181
 182    sf.thread4.nr_urb_entries = key->nr_urb_entries;
 183    sf.thread4.urb_entry_allocation_size = key->sfsize - 1;
 184
 185    /* Each SF thread produces 1 PUE, and there can be up to 24(Pre-IGDNG) or
 186     * 48(IGDNG) threads
 187     */
 188    if (BRW_IS_IGDNG(brw))
 189       chipset_max_threads = 48;
 190    else
 191       chipset_max_threads = 24;
 192
 193    sf.thread4.max_threads = MIN2(chipset_max_threads, key->nr_urb_entries) - 1;
 194
 195    if (INTEL_DEBUG & DEBUG_SINGLE_THREAD)
 196       sf.thread4.max_threads = 0;
 197
 198    if (INTEL_DEBUG & DEBUG_STATS)
 199       sf.thread4.stats_enable = 1;
 200
 201    /* CACHE_NEW_SF_VP */
 202    sf.sf5.sf_viewport_state_offset = brw->sf.vp_bo->offset >> 5; /* reloc */
 203
 204    sf.sf5.viewport_transform = 1;
 205
 206    /* _NEW_SCISSOR */
 207    if (key->scissor)
 208       sf.sf6.scissor = 1;
 209
 210    /* _NEW_POLYGON */
 211    if (key->front_face == GL_CCW)
 212       sf.sf5.front_winding = BRW_FRONTWINDING_CCW;
 213    else
 214       sf.sf5.front_winding = BRW_FRONTWINDING_CW;
 215
 216    /* The viewport is inverted for rendering to a FBO, and that inverts
 217     * polygon front/back orientation.
 218     */
 219    sf.sf5.front_winding ^= key->render_to_fbo;
 220
 221    switch (key->cull_face) {
 222    case GL_FRONT:
 223       sf.sf6.cull_mode = BRW_CULLMODE_FRONT;
 224       break;
 225    case GL_BACK:
 226       sf.sf6.cull_mode = BRW_CULLMODE_BACK;
 227       break;
 228    case GL_FRONT_AND_BACK:
 229       sf.sf6.cull_mode = BRW_CULLMODE_BOTH;
 230       break;
 231    case GL_NONE:
 232       sf.sf6.cull_mode = BRW_CULLMODE_NONE;
 233       break;
 234    default:
 235       assert(0);
 236       break;
 237    }
 238
 239    /* _NEW_LINE */
 240    /* XXX use ctx->Const.Min/MaxLineWidth here */
 241    sf.sf6.line_width = CLAMP(key->line_width, 1.0, 5.0) * (1<<1);
 242
 243    sf.sf6.line_endcap_aa_region_width = 1;
 244    if (key->line_smooth)
 245       sf.sf6.aa_enable = 1;
 246    else if (sf.sf6.line_width <= 0x2)
 247        sf.sf6.line_width = 0;
 248
 249    /* _NEW_BUFFERS */
 250    key->render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
 251    if (!key->render_to_fbo) {
 252       /* Rendering to an OpenGL window */
 253       sf.sf6.point_rast_rule = BRW_RASTRULE_UPPER_RIGHT;
 254    }
 255    else {
 256       /* If rendering to an FBO, the pixel coordinate system is
 257        * inverted with respect to the normal OpenGL coordinate
 258        * system, so BRW_RASTRULE_LOWER_RIGHT is correct.
 259        * But this value is listed as "Reserved, but not seen as useful"
 260        * in Intel documentation (page 212, "Point Rasterization Rule",
 261        * section 7.4 "SF Pipeline State Summary", of document
 262        * "Intel® 965 Express Chipset Family and Intel® G35 Express
 263        * Chipset Graphics Controller Programmer's Reference Manual,
 264        * Volume 2: 3D/Media", Revision 1.0b as of January 2008,
 265        * available at
 266        *     http://intellinuxgraphics.org/documentation.html
 267        * at the time of this writing).
 268        *
 269        * It does work on at least some devices, if not all;
 270        * if devices that don't support it can be identified,
 271        * the likely failure case is that points are rasterized
 272        * incorrectly, which is no worse than occurs without
 273        * the value, so we're using it here.
 274        */
 275       sf.sf6.point_rast_rule = BRW_RASTRULE_LOWER_RIGHT;
 276    }
 277    /* XXX clamp max depends on AA vs. non-AA */
 278
 279    /* _NEW_POINT */
 280    sf.sf7.sprite_point = key->point_sprite;
 281    sf.sf7.point_size = CLAMP(rint(key->point_size), 1, 255) * (1<<3);
 282    sf.sf7.use_point_size_state = !key->point_attenuated;
 283    sf.sf7.aa_line_distance_mode = 0;
 284
 285    /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons:
 286     */
 287    sf.sf7.trifan_pv = 2;
 288    sf.sf7.linestrip_pv = 1;
 289    sf.sf7.tristrip_pv = 2;
 290    sf.sf7.line_last_pixel_enable = 0;
 291
 292    /* Set bias for OpenGL rasterization rules:
 293     */
 294    sf.sf6.dest_org_vbias = 0x8;
 295    sf.sf6.dest_org_hbias = 0x8;
 296
 297    bo = brw_upload_cache(&brw->cache, BRW_SF_UNIT,
 298                          key, sizeof(*key),
 299                          reloc_bufs, 2,
 300                          &sf, sizeof(sf),
 301                          NULL, NULL);
 302
 303    /* Emit SF program relocation */
 304    dri_bo_emit_reloc(bo,
 305                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 306                      sf.thread0.grf_reg_count << 1,
 307                      offsetof(struct brw_sf_unit_state, thread0),
 308                      brw->sf.prog_bo);
 309
 310    /* Emit SF viewport relocation */
 311    dri_bo_emit_reloc(bo,
 312                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 313                      sf.sf5.front_winding | (sf.sf5.viewport_transform << 1),
 314                      offsetof(struct brw_sf_unit_state, sf5),
 315                      brw->sf.vp_bo);
 316
 317    return bo;
 318 }
 319
 320 static void upload_sf_unit( struct brw_context *brw )
 321 {
 322    struct brw_sf_unit_key key;
 323    dri_bo *reloc_bufs[2];
 324
 325    sf_unit_populate_key(brw, &key);
 326
 327    reloc_bufs[0] = brw->sf.prog_bo;
 328    reloc_bufs[1] = brw->sf.vp_bo;
 329
 330    dri_bo_unreference(brw->sf.state_bo);
 331    brw->sf.state_bo = brw_search_cache(&brw->cache, BRW_SF_UNIT,
 332                                        &key, sizeof(key),
 333                                        reloc_bufs, 2,
 334                                        NULL);
 335    if (brw->sf.state_bo == NULL) {
 336       brw->sf.state_bo = sf_unit_create_from_key(brw, &key, reloc_bufs);
 337    }
 338 }
 339
 340 const struct brw_tracked_state brw_sf_unit = {
 341    .dirty = {
 342       .mesa  = (_NEW_POLYGON |
 343                 _NEW_LINE |
 344                 _NEW_POINT |
 345                 _NEW_SCISSOR |
 346                 _NEW_BUFFERS),
 347       .brw   = BRW_NEW_URB_FENCE,
 348       .cache = (CACHE_NEW_SF_VP |
 349                 CACHE_NEW_SF_PROG)
 350    },
 351    .prepare = upload_sf_unit,
 352 };