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
 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    sf.thread3.urb_entry_read_offset = 1;
 175    sf.thread3.urb_entry_read_length = key->urb_entry_read_length;
 176
 177    sf.thread4.nr_urb_entries = key->nr_urb_entries;
 178    sf.thread4.urb_entry_allocation_size = key->sfsize - 1;
 179    /* Each SF thread produces 1 PUE, and there can be up to 24 threads */
 180    sf.thread4.max_threads = MIN2(24, key->nr_urb_entries) - 1;
 181
 182    if (INTEL_DEBUG & DEBUG_SINGLE_THREAD)
 183       sf.thread4.max_threads = 0;
 184
 185    if (INTEL_DEBUG & DEBUG_STATS)
 186       sf.thread4.stats_enable = 1;
 187
 188    /* CACHE_NEW_SF_VP */
 189    sf.sf5.sf_viewport_state_offset = brw->sf.vp_bo->offset >> 5; /* reloc */
 190
 191    sf.sf5.viewport_transform = 1;
 192
 193    /* _NEW_SCISSOR */
 194    if (key->scissor)
 195       sf.sf6.scissor = 1;
 196
 197    /* _NEW_POLYGON */
 198    if (key->front_face == GL_CCW)
 199       sf.sf5.front_winding = BRW_FRONTWINDING_CCW;
 200    else
 201       sf.sf5.front_winding = BRW_FRONTWINDING_CW;
 202
 203    /* The viewport is inverted for rendering to a FBO, and that inverts
 204     * polygon front/back orientation.
 205     */
 206    sf.sf5.front_winding ^= key->render_to_fbo;
 207
 208    switch (key->cull_face) {
 209    case GL_FRONT:
 210       sf.sf6.cull_mode = BRW_CULLMODE_FRONT;
 211       break;
 212    case GL_BACK:
 213       sf.sf6.cull_mode = BRW_CULLMODE_BACK;
 214       break;
 215    case GL_FRONT_AND_BACK:
 216       sf.sf6.cull_mode = BRW_CULLMODE_BOTH;
 217       break;
 218    case GL_NONE:
 219       sf.sf6.cull_mode = BRW_CULLMODE_NONE;
 220       break;
 221    default:
 222       assert(0);
 223       break;
 224    }
 225
 226    /* _NEW_LINE */
 227    /* XXX use ctx->Const.Min/MaxLineWidth here */
 228    sf.sf6.line_width = CLAMP(key->line_width, 1.0, 5.0) * (1<<1);
 229
 230    sf.sf6.line_endcap_aa_region_width = 1;
 231    if (key->line_smooth)
 232       sf.sf6.aa_enable = 1;
 233    else if (sf.sf6.line_width <= 0x2)
 234        sf.sf6.line_width = 0;
 235
 236    /* _NEW_BUFFERS */
 237    key->render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
 238    if (!key->render_to_fbo) {
 239       /* Rendering to an OpenGL window */
 240       sf.sf6.point_rast_rule = BRW_RASTRULE_UPPER_RIGHT;
 241    }
 242    else {
 243       /* If rendering to an FBO, the pixel coordinate system is
 244        * inverted with respect to the normal OpenGL coordinate
 245        * system, so BRW_RASTRULE_LOWER_RIGHT is correct.
 246        * But this value is listed as "Reserved, but not seen as useful"
 247        * in Intel documentation (page 212, "Point Rasterization Rule",
 248        * section 7.4 "SF Pipeline State Summary", of document
 249        * "Intel® 965 Express Chipset Family and Intel® G35 Express
 250        * Chipset Graphics Controller Programmer's Reference Manual,
 251        * Volume 2: 3D/Media", Revision 1.0b as of January 2008,
 252        * available at
 253        *     http://intellinuxgraphics.org/documentation.html
 254        * at the time of this writing).
 255        *
 256        * It does work on at least some devices, if not all;
 257        * if devices that don't support it can be identified,
 258        * the likely failure case is that points are rasterized
 259        * incorrectly, which is no worse than occurs without
 260        * the value, so we're using it here.
 261        */
 262       sf.sf6.point_rast_rule = BRW_RASTRULE_LOWER_RIGHT;
 263    }
 264    /* XXX clamp max depends on AA vs. non-AA */
 265
 266    /* _NEW_POINT */
 267    sf.sf7.sprite_point = key->point_sprite;
 268    sf.sf7.point_size = CLAMP(rint(key->point_size), 1, 255) * (1<<3);
 269    sf.sf7.use_point_size_state = !key->point_attenuated;
 270    sf.sf7.aa_line_distance_mode = 0;
 271
 272    /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons:
 273     */
 274    sf.sf7.trifan_pv = 2;
 275    sf.sf7.linestrip_pv = 1;
 276    sf.sf7.tristrip_pv = 2;
 277    sf.sf7.line_last_pixel_enable = 0;
 278
 279    /* Set bias for OpenGL rasterization rules:
 280     */
 281    sf.sf6.dest_org_vbias = 0x8;
 282    sf.sf6.dest_org_hbias = 0x8;
 283
 284    bo = brw_upload_cache(&brw->cache, BRW_SF_UNIT,
 285                          key, sizeof(*key),
 286                          reloc_bufs, 2,
 287                          &sf, sizeof(sf),
 288                          NULL, NULL);
 289
 290    /* Emit SF program relocation */
 291    dri_bo_emit_reloc(bo,
 292                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 293                      sf.thread0.grf_reg_count << 1,
 294                      offsetof(struct brw_sf_unit_state, thread0),
 295                      brw->sf.prog_bo);
 296
 297    /* Emit SF viewport relocation */
 298    dri_bo_emit_reloc(bo,
 299                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 300                      sf.sf5.front_winding | (sf.sf5.viewport_transform << 1),
 301                      offsetof(struct brw_sf_unit_state, sf5),
 302                      brw->sf.vp_bo);
 303
 304    return bo;
 305 }
 306
 307 static void upload_sf_unit( struct brw_context *brw )
 308 {
 309    struct brw_sf_unit_key key;
 310    dri_bo *reloc_bufs[2];
 311
 312    sf_unit_populate_key(brw, &key);
 313
 314    reloc_bufs[0] = brw->sf.prog_bo;
 315    reloc_bufs[1] = brw->sf.vp_bo;
 316
 317    dri_bo_unreference(brw->sf.state_bo);
 318    brw->sf.state_bo = brw_search_cache(&brw->cache, BRW_SF_UNIT,
 319                                        &key, sizeof(key),
 320                                        reloc_bufs, 2,
 321                                        NULL);
 322    if (brw->sf.state_bo == NULL) {
 323       brw->sf.state_bo = sf_unit_create_from_key(brw, &key, reloc_bufs);
 324    }
 325 }
 326
 327 const struct brw_tracked_state brw_sf_unit = {
 328    .dirty = {
 329       .mesa  = (_NEW_POLYGON |
 330                 _NEW_LINE |
 331                 _NEW_POINT |
 332                 _NEW_SCISSOR |
 333                 _NEW_BUFFERS),
 334       .brw   = BRW_NEW_URB_FENCE,
 335       .cache = (CACHE_NEW_SF_VP |
 336                 CACHE_NEW_SF_PROG)
 337    },
 338    .prepare = upload_sf_unit,
 339 };