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 "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    sf.thread4.max_threads = MIN2(12, key->nr_urb_entries / 2) - 1;
 176
 177    if (INTEL_DEBUG & DEBUG_SINGLE_THREAD)
 178       sf.thread4.max_threads = 0;
 179
 180    if (INTEL_DEBUG & DEBUG_STATS)
 181       sf.thread4.stats_enable = 1;
 182
 183    /* CACHE_NEW_SF_VP */
 184    sf.sf5.sf_viewport_state_offset = brw->sf.vp_bo->offset >> 5; /* reloc */
 185
 186    sf.sf5.viewport_transform = 1;
 187
 188    /* _NEW_SCISSOR */
 189    if (key->scissor)
 190       sf.sf6.scissor = 1;
 191
 192    /* _NEW_POLYGON */
 193    if (key->front_face == GL_CCW)
 194       sf.sf5.front_winding = BRW_FRONTWINDING_CCW;
 195    else
 196       sf.sf5.front_winding = BRW_FRONTWINDING_CW;
 197
 198    switch (key->cull_face) {
 199    case GL_FRONT:
 200       sf.sf6.cull_mode = BRW_CULLMODE_FRONT;
 201       break;
 202    case GL_BACK:
 203       sf.sf6.cull_mode = BRW_CULLMODE_BACK;
 204       break;
 205    case GL_FRONT_AND_BACK:
 206       sf.sf6.cull_mode = BRW_CULLMODE_BOTH;
 207       break;
 208    case GL_NONE:
 209       sf.sf6.cull_mode = BRW_CULLMODE_NONE;
 210       break;
 211    default:
 212       assert(0);
 213       break;
 214    }
 215
 216    /* _NEW_LINE */
 217    /* XXX use ctx->Const.Min/MaxLineWidth here */
 218    sf.sf6.line_width = CLAMP(key->line_width, 1.0, 5.0) * (1<<1);
 219
 220    sf.sf6.line_endcap_aa_region_width = 1;
 221    if (key->line_smooth)
 222       sf.sf6.aa_enable = 1;
 223    else if (sf.sf6.line_width <= 0x2)
 224        sf.sf6.line_width = 0;
 225
 226    /* _NEW_POINT */
 227    sf.sf6.point_rast_rule = BRW_RASTRULE_UPPER_RIGHT;   /* opengl conventions */
 228    /* XXX clamp max depends on AA vs. non-AA */
 229
 230    sf.sf7.sprite_point = key->point_sprite;
 231    sf.sf7.point_size = CLAMP(nearbyint(key->point_size), 1, 255) * (1<<3);
 232    sf.sf7.use_point_size_state = !key->point_attenuated;
 233    sf.sf7.aa_line_distance_mode = 0;
 234
 235    /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons:
 236     */
 237    sf.sf7.trifan_pv = 2;
 238    sf.sf7.linestrip_pv = 1;
 239    sf.sf7.tristrip_pv = 2;
 240    sf.sf7.line_last_pixel_enable = 0;
 241
 242    /* Set bias for OpenGL rasterization rules:
 243     */
 244    sf.sf6.dest_org_vbias = 0x8;
 245    sf.sf6.dest_org_hbias = 0x8;
 246
 247    bo = brw_upload_cache(&brw->cache, BRW_SF_UNIT,
 248                          key, sizeof(*key),
 249                          reloc_bufs, 2,
 250                          &sf, sizeof(sf),
 251                          NULL, NULL);
 252
 253    /* Emit SF program relocation */
 254    intel_bo_emit_reloc(bo,
 255                        I915_GEM_DOMAIN_INSTRUCTION, 0,
 256                        sf.thread0.grf_reg_count << 1,
 257                        offsetof(struct brw_sf_unit_state, thread0),
 258                        brw->sf.prog_bo);
 259
 260    /* Emit SF viewport relocation */
 261    intel_bo_emit_reloc(bo,
 262                        I915_GEM_DOMAIN_INSTRUCTION, 0,
 263                        sf.sf5.front_winding | (sf.sf5.viewport_transform << 1),
 264                        offsetof(struct brw_sf_unit_state, sf5),
 265                        brw->sf.vp_bo);
 266
 267    return bo;
 268 }
 269
 270 static void upload_sf_unit( struct brw_context *brw )
 271 {
 272    struct brw_sf_unit_key key;
 273    dri_bo *reloc_bufs[2];
 274
 275    sf_unit_populate_key(brw, &key);
 276
 277    reloc_bufs[0] = brw->sf.prog_bo;
 278    reloc_bufs[1] = brw->sf.vp_bo;
 279
 280    dri_bo_unreference(brw->sf.state_bo);
 281    brw->sf.state_bo = brw_search_cache(&brw->cache, BRW_SF_UNIT,
 282                                        &key, sizeof(key),
 283                                        reloc_bufs, 2,
 284                                        NULL);
 285    if (brw->sf.state_bo == NULL) {
 286       brw->sf.state_bo = sf_unit_create_from_key(brw, &key, reloc_bufs);
 287    }
 288 }
 289
 290 const struct brw_tracked_state brw_sf_unit = {
 291    .dirty = {
 292       .mesa  = (_NEW_POLYGON |
 293                 _NEW_LINE |
 294                 _NEW_POINT |
 295                 _NEW_SCISSOR),
 296       .brw   = (BRW_NEW_URB_FENCE |
 297                 BRW_NEW_METAOPS),
 298       .cache = (CACHE_NEW_SF_VP |
 299                 CACHE_NEW_SF_PROG)
 300    },
 301    .prepare = upload_sf_unit,
 302 };