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
  48    memset(&sfv, 0, sizeof(sfv));
  49
  50    if (render_to_fbo) {
  51       y_scale = 1.0;
  52       y_bias = 0;
  53    }
  54    else {
  55       y_scale = -1.0;
  56       y_bias = ctx->DrawBuffer->Height;
  57    }
  58
  59    /* _NEW_VIEWPORT */
  60
  61    const GLfloat *v = ctx->Viewport._WindowMap.m;
  62
  63    sfv.viewport.m00 = v[MAT_SX];
  64    sfv.viewport.m11 = v[MAT_SY] * y_scale;
  65    sfv.viewport.m22 = v[MAT_SZ] * depth_scale;
  66    sfv.viewport.m30 = v[MAT_TX];
  67    sfv.viewport.m31 = v[MAT_TY] * y_scale + y_bias;
  68    sfv.viewport.m32 = v[MAT_TZ] * depth_scale;
  69
  70    /* _NEW_SCISSOR */
  71
  72    /* The scissor only needs to handle the intersection of drawable and
  73     * scissor rect.  Clipping to the boundaries of static shared buffers
  74     * for front/back/depth is covered by looping over cliprects in brw_draw.c.
  75     *
  76     * Note that the hardware's coordinates are inclusive, while Mesa's min is
  77     * inclusive but max is exclusive.
  78     */
  79    if (render_to_fbo) {
  80       /* texmemory: Y=0=bottom */
  81       sfv.scissor.xmin = ctx->DrawBuffer->_Xmin;
  82       sfv.scissor.xmax = ctx->DrawBuffer->_Xmax - 1;
  83       sfv.scissor.ymin = ctx->DrawBuffer->_Ymin;
  84       sfv.scissor.ymax = ctx->DrawBuffer->_Ymax - 1;
  85    }
  86    else {
  87       /* memory: Y=0=top */
  88       sfv.scissor.xmin = ctx->DrawBuffer->_Xmin;
  89       sfv.scissor.xmax = ctx->DrawBuffer->_Xmax - 1;
  90       sfv.scissor.ymin = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymax;
  91       sfv.scissor.ymax = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymin - 1;
  92    }
  93
  94    dri_bo_unreference(brw->sf.vp_bo);
  95    brw->sf.vp_bo = brw_cache_data( &brw->cache, BRW_SF_VP, &sfv, NULL, 0 );
  96 }
  97
  98 const struct brw_tracked_state brw_sf_vp = {
  99    .dirty = {
 100       .mesa  = (_NEW_VIEWPORT |
 101                 _NEW_SCISSOR),
 102       .brw   = 0,
 103       .cache = 0
 104    },
 105    .prepare = upload_sf_vp
 106 };
 107
 108 struct brw_sf_unit_key {
 109    unsigned int total_grf;
 110    unsigned int urb_entry_read_length;
 111
 112    unsigned int nr_urb_entries, urb_size, sfsize;
 113
 114    GLenum front_face, cull_face;
 115    unsigned scissor:1;
 116    unsigned line_smooth:1;
 117    unsigned point_sprite:1;
 118    unsigned point_attenuated:1;
 119    unsigned render_to_fbo:1;
 120    float line_width;
 121    float point_size;
 122 };
 123
 124 static void
 125 sf_unit_populate_key(struct brw_context *brw, struct brw_sf_unit_key *key)
 126 {
 127    GLcontext *ctx = &brw->intel.ctx;
 128    memset(key, 0, sizeof(*key));
 129
 130    /* CACHE_NEW_SF_PROG */
 131    key->total_grf = brw->sf.prog_data->total_grf;
 132    key->urb_entry_read_length = brw->sf.prog_data->urb_read_length;
 133
 134    /* BRW_NEW_URB_FENCE */
 135    key->nr_urb_entries = brw->urb.nr_sf_entries;
 136    key->urb_size = brw->urb.vsize;
 137    key->sfsize = brw->urb.sfsize;
 138
 139    key->scissor = ctx->Scissor.Enabled;
 140    key->front_face = ctx->Polygon.FrontFace;
 141
 142    if (ctx->Polygon.CullFlag)
 143       key->cull_face = ctx->Polygon.CullFaceMode;
 144    else
 145       key->cull_face = GL_NONE;
 146
 147    key->line_width = ctx->Line.Width;
 148    key->line_smooth = ctx->Line.SmoothFlag;
 149
 150    key->point_sprite = ctx->Point.PointSprite;
 151    key->point_size = ctx->Point.Size;
 152    key->point_attenuated = ctx->Point._Attenuated;
 153
 154    key->render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
 155 }
 156
 157 static dri_bo *
 158 sf_unit_create_from_key(struct brw_context *brw, struct brw_sf_unit_key *key,
 159                         dri_bo **reloc_bufs)
 160 {
 161    struct brw_sf_unit_state sf;
 162    dri_bo *bo;
 163
 164    memset(&sf, 0, sizeof(sf));
 165
 166    sf.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
 167    sf.thread0.kernel_start_pointer = brw->sf.prog_bo->offset >> 6; /* reloc */
 168
 169    sf.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
 170
 171    sf.thread3.dispatch_grf_start_reg = 3;
 172    sf.thread3.urb_entry_read_offset = 1;
 173    sf.thread3.urb_entry_read_length = key->urb_entry_read_length;
 174
 175    sf.thread4.nr_urb_entries = key->nr_urb_entries;
 176    sf.thread4.urb_entry_allocation_size = key->sfsize - 1;
 177    /* Each SF thread produces 1 PUE, and there can be up to 24 threads */
 178    sf.thread4.max_threads = MIN2(24, key->nr_urb_entries) - 1;
 179
 180    if (INTEL_DEBUG & DEBUG_SINGLE_THREAD)
 181       sf.thread4.max_threads = 0;
 182
 183    if (INTEL_DEBUG & DEBUG_STATS)
 184       sf.thread4.stats_enable = 1;
 185
 186    /* CACHE_NEW_SF_VP */
 187    sf.sf5.sf_viewport_state_offset = brw->sf.vp_bo->offset >> 5; /* reloc */
 188
 189    sf.sf5.viewport_transform = 1;
 190
 191    /* _NEW_SCISSOR */
 192    if (key->scissor)
 193       sf.sf6.scissor = 1;
 194
 195    /* _NEW_POLYGON */
 196    if (key->front_face == GL_CCW)
 197       sf.sf5.front_winding = BRW_FRONTWINDING_CCW;
 198    else
 199       sf.sf5.front_winding = BRW_FRONTWINDING_CW;
 200
 201    /* The viewport is inverted for rendering to a FBO, and that inverts
 202     * polygon front/back orientation.
 203     */
 204    sf.sf5.front_winding ^= key->render_to_fbo;
 205
 206    switch (key->cull_face) {
 207    case GL_FRONT:
 208       sf.sf6.cull_mode = BRW_CULLMODE_FRONT;
 209       break;
 210    case GL_BACK:
 211       sf.sf6.cull_mode = BRW_CULLMODE_BACK;
 212       break;
 213    case GL_FRONT_AND_BACK:
 214       sf.sf6.cull_mode = BRW_CULLMODE_BOTH;
 215       break;
 216    case GL_NONE:
 217       sf.sf6.cull_mode = BRW_CULLMODE_NONE;
 218       break;
 219    default:
 220       assert(0);
 221       break;
 222    }
 223
 224    /* _NEW_LINE */
 225    /* XXX use ctx->Const.Min/MaxLineWidth here */
 226    sf.sf6.line_width = CLAMP(key->line_width, 1.0, 5.0) * (1<<1);
 227
 228    sf.sf6.line_endcap_aa_region_width = 1;
 229    if (key->line_smooth)
 230       sf.sf6.aa_enable = 1;
 231    else if (sf.sf6.line_width <= 0x2)
 232        sf.sf6.line_width = 0;
 233
 234    /* _NEW_POINT */
 235    sf.sf6.point_rast_rule = BRW_RASTRULE_UPPER_RIGHT;   /* opengl conventions */
 236    /* XXX clamp max depends on AA vs. non-AA */
 237
 238    sf.sf7.sprite_point = key->point_sprite;
 239    sf.sf7.point_size = CLAMP(rint(key->point_size), 1, 255) * (1<<3);
 240    sf.sf7.use_point_size_state = !key->point_attenuated;
 241    sf.sf7.aa_line_distance_mode = 0;
 242
 243    /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons:
 244     */
 245    sf.sf7.trifan_pv = 2;
 246    sf.sf7.linestrip_pv = 1;
 247    sf.sf7.tristrip_pv = 2;
 248    sf.sf7.line_last_pixel_enable = 0;
 249
 250    /* Set bias for OpenGL rasterization rules:
 251     */
 252    sf.sf6.dest_org_vbias = 0x8;
 253    sf.sf6.dest_org_hbias = 0x8;
 254
 255    bo = brw_upload_cache(&brw->cache, BRW_SF_UNIT,
 256                          key, sizeof(*key),
 257                          reloc_bufs, 2,
 258                          &sf, sizeof(sf),
 259                          NULL, NULL);
 260
 261    /* Emit SF program relocation */
 262    dri_bo_emit_reloc(bo,
 263                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 264                      sf.thread0.grf_reg_count << 1,
 265                      offsetof(struct brw_sf_unit_state, thread0),
 266                      brw->sf.prog_bo);
 267
 268    /* Emit SF viewport relocation */
 269    dri_bo_emit_reloc(bo,
 270                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 271                      sf.sf5.front_winding | (sf.sf5.viewport_transform << 1),
 272                      offsetof(struct brw_sf_unit_state, sf5),
 273                      brw->sf.vp_bo);
 274
 275    return bo;
 276 }
 277
 278 static void upload_sf_unit( struct brw_context *brw )
 279 {
 280    struct brw_sf_unit_key key;
 281    dri_bo *reloc_bufs[2];
 282
 283    sf_unit_populate_key(brw, &key);
 284
 285    reloc_bufs[0] = brw->sf.prog_bo;
 286    reloc_bufs[1] = brw->sf.vp_bo;
 287
 288    dri_bo_unreference(brw->sf.state_bo);
 289    brw->sf.state_bo = brw_search_cache(&brw->cache, BRW_SF_UNIT,
 290                                        &key, sizeof(key),
 291                                        reloc_bufs, 2,
 292                                        NULL);
 293    if (brw->sf.state_bo == NULL) {
 294       brw->sf.state_bo = sf_unit_create_from_key(brw, &key, reloc_bufs);
 295    }
 296 }
 297
 298 const struct brw_tracked_state brw_sf_unit = {
 299    .dirty = {
 300       .mesa  = (_NEW_POLYGON |
 301                 _NEW_LINE |
 302                 _NEW_POINT |
 303                 _NEW_SCISSOR),
 304       .brw   = BRW_NEW_URB_FENCE,
 305       .cache = (CACHE_NEW_SF_VP |
 306                 CACHE_NEW_SF_PROG)
 307    },
 308    .prepare = upload_sf_unit,
 309 };