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