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    memset(key, 0, sizeof(*key));
 128
 129    /* CACHE_NEW_SF_PROG */
 130    key->total_grf = brw->sf.prog_data->total_grf;
 131    key->urb_entry_read_length = brw->sf.prog_data->urb_read_length;
 132
 133    /* BRW_NEW_URB_FENCE */
 134    key->nr_urb_entries = brw->urb.nr_sf_entries;
 135    key->urb_size = brw->urb.vsize;
 136    key->sfsize = brw->urb.sfsize;
 137
 138    key->scissor = brw->attribs.Scissor->Enabled;
 139    key->front_face = brw->attribs.Polygon->FrontFace;
 140
 141    if (brw->attribs.Polygon->CullFlag)
 142       key->cull_face = brw->attribs.Polygon->CullFaceMode;
 143    else
 144       key->cull_face = GL_NONE;
 145
 146    key->line_width = brw->attribs.Line->Width;
 147    key->line_smooth = brw->attribs.Line->SmoothFlag;
 148
 149    key->point_sprite = brw->attribs.Point->PointSprite;
 150    key->point_size = brw->attribs.Point->Size;
 151    key->point_attenuated = brw->attribs.Point->_Attenuated;
 152
 153    key->render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
 154 }
 155
 156 static dri_bo *
 157 sf_unit_create_from_key(struct brw_context *brw, struct brw_sf_unit_key *key,
 158                         dri_bo **reloc_bufs)
 159 {
 160    struct brw_sf_unit_state sf;
 161    dri_bo *bo;
 162
 163    memset(&sf, 0, sizeof(sf));
 164
 165    sf.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
 166    sf.thread0.kernel_start_pointer = brw->sf.prog_bo->offset >> 6; /* reloc */
 167
 168    sf.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
 169
 170    sf.thread3.dispatch_grf_start_reg = 3;
 171    sf.thread3.urb_entry_read_offset = 1;
 172    sf.thread3.urb_entry_read_length = key->urb_entry_read_length;
 173
 174    sf.thread4.nr_urb_entries = key->nr_urb_entries;
 175    sf.thread4.urb_entry_allocation_size = key->sfsize - 1;
 176    /* Each SF thread produces 1 PUE, and there can be up to 24 threads */
 177    sf.thread4.max_threads = MIN2(24, key->nr_urb_entries) - 1;
 178
 179    if (INTEL_DEBUG & DEBUG_SINGLE_THREAD)
 180       sf.thread4.max_threads = 0;
 181
 182    if (INTEL_DEBUG & DEBUG_STATS)
 183       sf.thread4.stats_enable = 1;
 184
 185    /* CACHE_NEW_SF_VP */
 186    sf.sf5.sf_viewport_state_offset = brw->sf.vp_bo->offset >> 5; /* reloc */
 187
 188    sf.sf5.viewport_transform = 1;
 189
 190    /* _NEW_SCISSOR */
 191    if (key->scissor)
 192       sf.sf6.scissor = 1;
 193
 194    /* _NEW_POLYGON */
 195    if (key->front_face == GL_CCW)
 196       sf.sf5.front_winding = BRW_FRONTWINDING_CCW;
 197    else
 198       sf.sf5.front_winding = BRW_FRONTWINDING_CW;
 199
 200    /* The viewport is inverted for rendering to a FBO, and that inverts
 201     * polygon front/back orientation.
 202     */
 203    sf.sf5.front_winding ^= key->render_to_fbo;
 204
 205    switch (key->cull_face) {
 206    case GL_FRONT:
 207       sf.sf6.cull_mode = BRW_CULLMODE_FRONT;
 208       break;
 209    case GL_BACK:
 210       sf.sf6.cull_mode = BRW_CULLMODE_BACK;
 211       break;
 212    case GL_FRONT_AND_BACK:
 213       sf.sf6.cull_mode = BRW_CULLMODE_BOTH;
 214       break;
 215    case GL_NONE:
 216       sf.sf6.cull_mode = BRW_CULLMODE_NONE;
 217       break;
 218    default:
 219       assert(0);
 220       break;
 221    }
 222
 223    /* _NEW_LINE */
 224    /* XXX use ctx->Const.Min/MaxLineWidth here */
 225    sf.sf6.line_width = CLAMP(key->line_width, 1.0, 5.0) * (1<<1);
 226
 227    sf.sf6.line_endcap_aa_region_width = 1;
 228    if (key->line_smooth)
 229       sf.sf6.aa_enable = 1;
 230    else if (sf.sf6.line_width <= 0x2)
 231        sf.sf6.line_width = 0;
 232
 233    /* _NEW_POINT */
 234    sf.sf6.point_rast_rule = BRW_RASTRULE_UPPER_RIGHT;   /* opengl conventions */
 235    /* XXX clamp max depends on AA vs. non-AA */
 236
 237    sf.sf7.sprite_point = key->point_sprite;
 238    sf.sf7.point_size = CLAMP(rint(key->point_size), 1, 255) * (1<<3);
 239    sf.sf7.use_point_size_state = !key->point_attenuated;
 240    sf.sf7.aa_line_distance_mode = 0;
 241
 242    /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons:
 243     */
 244    sf.sf7.trifan_pv = 2;
 245    sf.sf7.linestrip_pv = 1;
 246    sf.sf7.tristrip_pv = 2;
 247    sf.sf7.line_last_pixel_enable = 0;
 248
 249    /* Set bias for OpenGL rasterization rules:
 250     */
 251    sf.sf6.dest_org_vbias = 0x8;
 252    sf.sf6.dest_org_hbias = 0x8;
 253
 254    bo = brw_upload_cache(&brw->cache, BRW_SF_UNIT,
 255                          key, sizeof(*key),
 256                          reloc_bufs, 2,
 257                          &sf, sizeof(sf),
 258                          NULL, NULL);
 259
 260    /* Emit SF program relocation */
 261    dri_bo_emit_reloc(bo,
 262                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 263                      sf.thread0.grf_reg_count << 1,
 264                      offsetof(struct brw_sf_unit_state, thread0),
 265                      brw->sf.prog_bo);
 266
 267    /* Emit SF viewport relocation */
 268    dri_bo_emit_reloc(bo,
 269                      I915_GEM_DOMAIN_INSTRUCTION, 0,
 270                      sf.sf5.front_winding | (sf.sf5.viewport_transform << 1),
 271                      offsetof(struct brw_sf_unit_state, sf5),
 272                      brw->sf.vp_bo);
 273
 274    return bo;
 275 }
 276
 277 static void upload_sf_unit( struct brw_context *brw )
 278 {
 279    struct brw_sf_unit_key key;
 280    dri_bo *reloc_bufs[2];
 281
 282    sf_unit_populate_key(brw, &key);
 283
 284    reloc_bufs[0] = brw->sf.prog_bo;
 285    reloc_bufs[1] = brw->sf.vp_bo;
 286
 287    dri_bo_unreference(brw->sf.state_bo);
 288    brw->sf.state_bo = brw_search_cache(&brw->cache, BRW_SF_UNIT,
 289                                        &key, sizeof(key),
 290                                        reloc_bufs, 2,
 291                                        NULL);
 292    if (brw->sf.state_bo == NULL) {
 293       brw->sf.state_bo = sf_unit_create_from_key(brw, &key, reloc_bufs);
 294    }
 295 }
 296
 297 const struct brw_tracked_state brw_sf_unit = {
 298    .dirty = {
 299       .mesa  = (_NEW_POLYGON |
 300                 _NEW_LINE |
 301                 _NEW_POINT |
 302                 _NEW_SCISSOR),
 303       .brw   = BRW_NEW_URB_FENCE,
 304       .cache = (CACHE_NEW_SF_VP |
 305                 CACHE_NEW_SF_PROG)
 306    },
 307    .prepare = upload_sf_unit,
 308 };