src/mesa/drivers/dri/i915/i915_vtbl.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * 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, sub license, 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 portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29
  30 #include "main/glheader.h"
  31 #include "main/mtypes.h"
  32 #include "main/imports.h"
  33 #include "main/macros.h"
  34 #include "main/renderbuffer.h"
  35 #include "main/framebuffer.h"
  36
  37 #include "tnl/tnl.h"
  38 #include "tnl/t_context.h"
  39 #include "tnl/t_vertex.h"
  40 #include "swrast_setup/swrast_setup.h"
  41
  42 #include "intel_batchbuffer.h"
  43 #include "intel_mipmap_tree.h"
  44 #include "intel_regions.h"
  45 #include "intel_tris.h"
  46 #include "intel_fbo.h"
  47 #include "intel_buffers.h"
  48
  49 #include "i915_reg.h"
  50 #include "i915_context.h"
  51
  52 static void
  53 i915_render_prevalidate(struct intel_context *intel)
  54 {
  55    struct i915_context *i915 = i915_context(&intel->ctx);
  56
  57    i915ValidateFragmentProgram(i915);
  58 }
  59
  60 static void
  61 i915_render_start(struct intel_context *intel)
  62 {
  63    intel_prepare_render(intel);
  64 }
  65
  66
  67 static void
  68 i915_reduced_primitive_state(struct intel_context *intel, GLenum rprim)
  69 {
  70    struct i915_context *i915 = i915_context(&intel->ctx);
  71    GLuint st1 = i915->state.Stipple[I915_STPREG_ST1];
  72
  73    st1 &= ~ST1_ENABLE;
  74
  75    switch (rprim) {
  76    case GL_QUADS: /* from RASTERIZE(GL_QUADS) in t_dd_tritemp.h */
  77    case GL_TRIANGLES:
  78       if (intel->ctx.Polygon.StippleFlag && intel->hw_stipple)
  79          st1 |= ST1_ENABLE;
  80       break;
  81    case GL_LINES:
  82    case GL_POINTS:
  83    default:
  84       break;
  85    }
  86
  87    i915->intel.reduced_primitive = rprim;
  88
  89    if (st1 != i915->state.Stipple[I915_STPREG_ST1]) {
  90       INTEL_FIREVERTICES(intel);
  91
  92       I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
  93       i915->state.Stipple[I915_STPREG_ST1] = st1;
  94    }
  95 }
  96
  97
  98 /* Pull apart the vertex format registers and figure out how large a
  99  * vertex is supposed to be.
 100  */
 101 static bool
 102 i915_check_vertex_size(struct intel_context *intel, GLuint expected)
 103 {
 104    struct i915_context *i915 = i915_context(&intel->ctx);
 105    int lis2 = i915->state.Ctx[I915_CTXREG_LIS2];
 106    int lis4 = i915->state.Ctx[I915_CTXREG_LIS4];
 107    int i, sz = 0;
 108
 109    switch (lis4 & S4_VFMT_XYZW_MASK) {
 110    case S4_VFMT_XY:
 111       sz = 2;
 112       break;
 113    case S4_VFMT_XYZ:
 114       sz = 3;
 115       break;
 116    case S4_VFMT_XYW:
 117       sz = 3;
 118       break;
 119    case S4_VFMT_XYZW:
 120       sz = 4;
 121       break;
 122    default:
 123       fprintf(stderr, "no xyzw specified\n");
 124       return 0;
 125    }
 126
 127    if (lis4 & S4_VFMT_SPEC_FOG)
 128       sz++;
 129    if (lis4 & S4_VFMT_COLOR)
 130       sz++;
 131    if (lis4 & S4_VFMT_DEPTH_OFFSET)
 132       sz++;
 133    if (lis4 & S4_VFMT_POINT_WIDTH)
 134       sz++;
 135    if (lis4 & S4_VFMT_FOG_PARAM)
 136       sz++;
 137
 138    for (i = 0; i < 8; i++) {
 139       switch (lis2 & S2_TEXCOORD_FMT0_MASK) {
 140       case TEXCOORDFMT_2D:
 141          sz += 2;
 142          break;
 143       case TEXCOORDFMT_3D:
 144          sz += 3;
 145          break;
 146       case TEXCOORDFMT_4D:
 147          sz += 4;
 148          break;
 149       case TEXCOORDFMT_1D:
 150          sz += 1;
 151          break;
 152       case TEXCOORDFMT_2D_16:
 153          sz += 1;
 154          break;
 155       case TEXCOORDFMT_4D_16:
 156          sz += 2;
 157          break;
 158       case TEXCOORDFMT_NOT_PRESENT:
 159          break;
 160       default:
 161          fprintf(stderr, "bad texcoord fmt %d\n", i);
 162          return false;
 163       }
 164       lis2 >>= S2_TEXCOORD_FMT1_SHIFT;
 165    }
 166
 167    if (sz != expected)
 168       fprintf(stderr, "vertex size mismatch %d/%d\n", sz, expected);
 169
 170    return sz == expected;
 171 }
 172
 173
 174 static void
 175 i915_emit_invarient_state(struct intel_context *intel)
 176 {
 177    BATCH_LOCALS;
 178
 179    BEGIN_BATCH(15);
 180
 181    OUT_BATCH(_3DSTATE_AA_CMD |
 182              AA_LINE_ECAAR_WIDTH_ENABLE |
 183              AA_LINE_ECAAR_WIDTH_1_0 |
 184              AA_LINE_REGION_WIDTH_ENABLE | AA_LINE_REGION_WIDTH_1_0);
 185
 186    OUT_BATCH(_3DSTATE_DFLT_DIFFUSE_CMD);
 187    OUT_BATCH(0);
 188
 189    OUT_BATCH(_3DSTATE_DFLT_SPEC_CMD);
 190    OUT_BATCH(0);
 191
 192    OUT_BATCH(_3DSTATE_DFLT_Z_CMD);
 193    OUT_BATCH(0);
 194
 195    /* Don't support texture crossbar yet */
 196    OUT_BATCH(_3DSTATE_COORD_SET_BINDINGS |
 197              CSB_TCB(0, 0) |
 198              CSB_TCB(1, 1) |
 199              CSB_TCB(2, 2) |
 200              CSB_TCB(3, 3) |
 201              CSB_TCB(4, 4) | CSB_TCB(5, 5) | CSB_TCB(6, 6) | CSB_TCB(7, 7));
 202
 203    OUT_BATCH(_3DSTATE_SCISSOR_RECT_0_CMD);
 204    OUT_BATCH(0);
 205    OUT_BATCH(0);
 206
 207    /* XXX: Use this */
 208    OUT_BATCH(_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
 209
 210    OUT_BATCH(_3DSTATE_DEPTH_SUBRECT_DISABLE);
 211
 212    OUT_BATCH(_3DSTATE_LOAD_INDIRECT | 0);       /* disable indirect state */
 213    OUT_BATCH(0);
 214
 215    ADVANCE_BATCH();
 216 }
 217
 218
 219 #define emit(intel, state, size )                    \
 220    intel_batchbuffer_data(intel, state, size)
 221
 222 static GLuint
 223 get_dirty(struct i915_hw_state *state)
 224 {
 225    GLuint dirty;
 226
 227    /* Workaround the multitex hang - if one texture unit state is
 228     * modified, emit all texture units.
 229     */
 230    dirty = state->active & ~state->emitted;
 231    if (dirty & I915_UPLOAD_TEX_ALL)
 232       state->emitted &= ~I915_UPLOAD_TEX_ALL;
 233    dirty = state->active & ~state->emitted;
 234    return dirty;
 235 }
 236
 237
 238 static GLuint
 239 get_state_size(struct i915_hw_state *state)
 240 {
 241    GLuint dirty = get_dirty(state);
 242    GLuint i;
 243    GLuint sz = 0;
 244
 245    if (dirty & I915_UPLOAD_INVARIENT)
 246       sz += 30 * 4;
 247
 248    if (dirty & I915_UPLOAD_RASTER_RULES)
 249       sz += sizeof(state->RasterRules);
 250
 251    if (dirty & I915_UPLOAD_CTX)
 252       sz += sizeof(state->Ctx);
 253
 254    if (dirty & I915_UPLOAD_BLEND)
 255       sz += sizeof(state->Blend);
 256
 257    if (dirty & I915_UPLOAD_BUFFERS)
 258       sz += sizeof(state->Buffer);
 259
 260    if (dirty & I915_UPLOAD_STIPPLE)
 261       sz += sizeof(state->Stipple);
 262
 263    if (dirty & I915_UPLOAD_TEX_ALL) {
 264       int nr = 0;
 265       for (i = 0; i < I915_TEX_UNITS; i++)
 266          if (dirty & I915_UPLOAD_TEX(i))
 267             nr++;
 268
 269       sz += (2 + nr * 3) * sizeof(GLuint) * 2;
 270    }
 271
 272    if (dirty & I915_UPLOAD_CONSTANTS)
 273       sz += state->ConstantSize * sizeof(GLuint);
 274
 275    if (dirty & I915_UPLOAD_PROGRAM)
 276       sz += state->ProgramSize * sizeof(GLuint);
 277
 278    return sz;
 279 }
 280
 281 /* Push the state into the sarea and/or texture memory.
 282  */
 283 static void
 284 i915_emit_state(struct intel_context *intel)
 285 {
 286    struct i915_context *i915 = i915_context(&intel->ctx);
 287    struct i915_hw_state *state = &i915->state;
 288    int i, count, aper_count;
 289    GLuint dirty;
 290    drm_intel_bo *aper_array[3 + I915_TEX_UNITS];
 291    GET_CURRENT_CONTEXT(ctx);
 292    BATCH_LOCALS;
 293
 294    /* We don't hold the lock at this point, so want to make sure that
 295     * there won't be a buffer wrap between the state emits and the primitive
 296     * emit header.
 297     *
 298     * It might be better to talk about explicit places where
 299     * scheduling is allowed, rather than assume that it is whenever a
 300     * batchbuffer fills up.
 301     */
 302    intel_batchbuffer_require_space(intel,
 303                                    get_state_size(state) +
 304                                    INTEL_PRIM_EMIT_SIZE);
 305    count = 0;
 306  again:
 307    if (intel->batch.bo == NULL) {
 308       _mesa_error(ctx, GL_OUT_OF_MEMORY, "i915 emit state");
 309       assert(0);
 310    }
 311    aper_count = 0;
 312    dirty = get_dirty(state);
 313
 314    aper_array[aper_count++] = intel->batch.bo;
 315    if (dirty & I915_UPLOAD_BUFFERS) {
 316       if (state->draw_region)
 317          aper_array[aper_count++] = state->draw_region->bo;
 318       if (state->depth_region)
 319          aper_array[aper_count++] = state->depth_region->bo;
 320    }
 321
 322    if (dirty & I915_UPLOAD_TEX_ALL) {
 323       for (i = 0; i < I915_TEX_UNITS; i++) {
 324          if (dirty & I915_UPLOAD_TEX(i)) {
 325             if (state->tex_buffer[i]) {
 326                aper_array[aper_count++] = state->tex_buffer[i];
 327             }
 328          }
 329       }
 330    }
 331
 332    if (dri_bufmgr_check_aperture_space(aper_array, aper_count)) {
 333        if (count == 0) {
 334            count++;
 335            intel_batchbuffer_flush(intel);
 336            goto again;
 337        } else {
 338            _mesa_error(ctx, GL_OUT_OF_MEMORY, "i915 emit state");
 339            assert(0);
 340        }
 341    }
 342
 343    /* work out list of buffers to emit */
 344
 345    /* Do this here as we may have flushed the batchbuffer above,
 346     * causing more state to be dirty!
 347     */
 348    dirty = get_dirty(state);
 349    state->emitted |= dirty;
 350    assert(get_dirty(state) == 0);
 351
 352    if (INTEL_DEBUG & DEBUG_STATE)
 353       fprintf(stderr, "%s dirty: %x\n", __func__, dirty);
 354
 355    if (dirty & I915_UPLOAD_INVARIENT) {
 356       if (INTEL_DEBUG & DEBUG_STATE)
 357          fprintf(stderr, "I915_UPLOAD_INVARIENT:\n");
 358       i915_emit_invarient_state(intel);
 359    }
 360
 361    if (dirty & I915_UPLOAD_RASTER_RULES) {
 362       if (INTEL_DEBUG & DEBUG_STATE)
 363          fprintf(stderr, "I915_UPLOAD_RASTER_RULES:\n");
 364       emit(intel, state->RasterRules, sizeof(state->RasterRules));
 365    }
 366
 367    if (dirty & I915_UPLOAD_CTX) {
 368       if (INTEL_DEBUG & DEBUG_STATE)
 369          fprintf(stderr, "I915_UPLOAD_CTX:\n");
 370
 371       emit(intel, state->Ctx, sizeof(state->Ctx));
 372    }
 373
 374    if (dirty & I915_UPLOAD_BLEND) {
 375       if (INTEL_DEBUG & DEBUG_STATE)
 376          fprintf(stderr, "I915_UPLOAD_BLEND:\n");
 377
 378       emit(intel, state->Blend, sizeof(state->Blend));
 379    }
 380
 381    if (dirty & I915_UPLOAD_BUFFERS) {
 382       GLuint count;
 383
 384       if (INTEL_DEBUG & DEBUG_STATE)
 385          fprintf(stderr, "I915_UPLOAD_BUFFERS:\n");
 386
 387       count = 17;
 388       if (state->Buffer[I915_DESTREG_DRAWRECT0] != MI_NOOP)
 389          count++;
 390
 391       BEGIN_BATCH(count);
 392       OUT_BATCH(state->Buffer[I915_DESTREG_CBUFADDR0]);
 393       OUT_BATCH(state->Buffer[I915_DESTREG_CBUFADDR1]);
 394       if (state->draw_region) {
 395          OUT_RELOC(state->draw_region->bo,
 396                    I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
 397       } else {
 398          OUT_BATCH(0);
 399       }
 400
 401       OUT_BATCH(state->Buffer[I915_DESTREG_DBUFADDR0]);
 402       OUT_BATCH(state->Buffer[I915_DESTREG_DBUFADDR1]);
 403       if (state->depth_region) {
 404          OUT_RELOC(state->depth_region->bo,
 405                    I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
 406       } else {
 407          OUT_BATCH(0);
 408       }
 409
 410       OUT_BATCH(state->Buffer[I915_DESTREG_DV0]);
 411       OUT_BATCH(state->Buffer[I915_DESTREG_DV1]);
 412       OUT_BATCH(state->Buffer[I915_DESTREG_SR0]);
 413       OUT_BATCH(state->Buffer[I915_DESTREG_SR1]);
 414       OUT_BATCH(state->Buffer[I915_DESTREG_SR2]);
 415       OUT_BATCH(state->Buffer[I915_DESTREG_SENABLE]);
 416
 417       if (state->Buffer[I915_DESTREG_DRAWRECT0] != MI_NOOP)
 418          OUT_BATCH(state->Buffer[I915_DESTREG_DRAWRECT0]);
 419       OUT_BATCH(state->Buffer[I915_DESTREG_DRAWRECT1]);
 420       OUT_BATCH(state->Buffer[I915_DESTREG_DRAWRECT2]);
 421       OUT_BATCH(state->Buffer[I915_DESTREG_DRAWRECT3]);
 422       OUT_BATCH(state->Buffer[I915_DESTREG_DRAWRECT4]);
 423       OUT_BATCH(state->Buffer[I915_DESTREG_DRAWRECT5]);
 424
 425       ADVANCE_BATCH();
 426    }
 427
 428    if (dirty & I915_UPLOAD_STIPPLE) {
 429       if (INTEL_DEBUG & DEBUG_STATE)
 430          fprintf(stderr, "I915_UPLOAD_STIPPLE:\n");
 431       emit(intel, state->Stipple, sizeof(state->Stipple));
 432    }
 433
 434    /* Combine all the dirty texture state into a single command to
 435     * avoid lockups on I915 hardware.
 436     */
 437    if (dirty & I915_UPLOAD_TEX_ALL) {
 438       int nr = 0;
 439       GLuint unwind;
 440
 441       for (i = 0; i < I915_TEX_UNITS; i++)
 442          if (dirty & I915_UPLOAD_TEX(i))
 443             nr++;
 444
 445       BEGIN_BATCH(2 + nr * 3);
 446       OUT_BATCH(_3DSTATE_MAP_STATE | (3 * nr));
 447       OUT_BATCH((dirty & I915_UPLOAD_TEX_ALL) >> I915_UPLOAD_TEX_0_SHIFT);
 448       for (i = 0; i < I915_TEX_UNITS; i++)
 449          if (dirty & I915_UPLOAD_TEX(i)) {
 450             OUT_RELOC(state->tex_buffer[i],
 451                       I915_GEM_DOMAIN_SAMPLER, 0,
 452                       state->tex_offset[i]);
 453
 454             OUT_BATCH(state->Tex[i][I915_TEXREG_MS3]);
 455             OUT_BATCH(state->Tex[i][I915_TEXREG_MS4]);
 456          }
 457       ADVANCE_BATCH();
 458
 459       unwind = intel->batch.used;
 460       BEGIN_BATCH(2 + nr * 3);
 461       OUT_BATCH(_3DSTATE_SAMPLER_STATE | (3 * nr));
 462       OUT_BATCH((dirty & I915_UPLOAD_TEX_ALL) >> I915_UPLOAD_TEX_0_SHIFT);
 463       for (i = 0; i < I915_TEX_UNITS; i++)
 464          if (dirty & I915_UPLOAD_TEX(i)) {
 465             OUT_BATCH(state->Tex[i][I915_TEXREG_SS2]);
 466             OUT_BATCH(state->Tex[i][I915_TEXREG_SS3]);
 467             OUT_BATCH(state->Tex[i][I915_TEXREG_SS4]);
 468          }
 469       ADVANCE_BATCH();
 470       if (i915->last_sampler &&
 471           memcmp(intel->batch.map + i915->last_sampler,
 472                  intel->batch.map + unwind,
 473                  (2 + nr*3)*sizeof(int)) == 0)
 474           intel->batch.used = unwind;
 475       else
 476           i915->last_sampler = unwind;
 477    }
 478
 479    if (dirty & I915_UPLOAD_CONSTANTS) {
 480       if (INTEL_DEBUG & DEBUG_STATE)
 481          fprintf(stderr, "I915_UPLOAD_CONSTANTS:\n");
 482       emit(intel, state->Constant, state->ConstantSize * sizeof(GLuint));
 483    }
 484
 485    if (dirty & I915_UPLOAD_PROGRAM) {
 486       if (state->ProgramSize) {
 487          if (INTEL_DEBUG & DEBUG_STATE)
 488             fprintf(stderr, "I915_UPLOAD_PROGRAM:\n");
 489
 490          assert((state->Program[0] & 0x1ff) + 2 == state->ProgramSize);
 491
 492          emit(intel, state->Program, state->ProgramSize * sizeof(GLuint));
 493          if (INTEL_DEBUG & DEBUG_STATE)
 494             i915_disassemble_program(state->Program, state->ProgramSize);
 495       }
 496    }
 497
 498    assert(get_dirty(state) == 0);
 499 }
 500
 501 static void
 502 i915_destroy_context(struct intel_context *intel)
 503 {
 504    GLuint i;
 505    struct i915_context *i915 = i915_context(&intel->ctx);
 506
 507    intel_region_release(&i915->state.draw_region);
 508    intel_region_release(&i915->state.depth_region);
 509
 510    for (i = 0; i < I915_TEX_UNITS; i++) {
 511       if (i915->state.tex_buffer[i] != NULL) {
 512          drm_intel_bo_unreference(i915->state.tex_buffer[i]);
 513          i915->state.tex_buffer[i] = NULL;
 514       }
 515    }
 516
 517    _tnl_free_vertices(&intel->ctx);
 518 }
 519
 520 void
 521 i915_set_buf_info_for_region(uint32_t *state, struct intel_region *region,
 522                              uint32_t buffer_id)
 523 {
 524    state[0] = _3DSTATE_BUF_INFO_CMD;
 525    state[1] = buffer_id;
 526
 527    if (region != NULL) {
 528       state[1] |= BUF_3D_PITCH(region->pitch);
 529
 530       if (region->tiling != I915_TILING_NONE) {
 531          state[1] |= BUF_3D_TILED_SURFACE;
 532          if (region->tiling == I915_TILING_Y)
 533             state[1] |= BUF_3D_TILE_WALK_Y;
 534       }
 535    } else {
 536       /* Fill in a default pitch, since 0 is invalid.  We'll be
 537        * setting the buffer offset to 0 and not referencing the
 538        * buffer, so the pitch could really be any valid value.
 539        */
 540       state[1] |= BUF_3D_PITCH(4096);
 541    }
 542 }
 543
 544 static uint32_t i915_render_target_format_for_mesa_format[MESA_FORMAT_COUNT] =
 545 {
 546    [MESA_FORMAT_B8G8R8A8_UNORM] = DV_PF_8888,
 547    [MESA_FORMAT_B8G8R8X8_UNORM] = DV_PF_8888,
 548    [MESA_FORMAT_B5G6R5_UNORM] = DV_PF_565 | DITHER_FULL_ALWAYS,
 549    [MESA_FORMAT_B5G5R5A1_UNORM] = DV_PF_1555 | DITHER_FULL_ALWAYS,
 550    [MESA_FORMAT_B4G4R4A4_UNORM] = DV_PF_4444 | DITHER_FULL_ALWAYS,
 551 };
 552
 553 static bool
 554 i915_render_target_supported(struct intel_context *intel,
 555                              struct gl_renderbuffer *rb)
 556 {
 557    mesa_format format = rb->Format;
 558
 559    if (format == MESA_FORMAT_Z24_UNORM_S8_UINT ||
 560        format == MESA_FORMAT_Z24_UNORM_X8_UINT ||
 561        format == MESA_FORMAT_Z_UNORM16) {
 562       return true;
 563    }
 564
 565    return i915_render_target_format_for_mesa_format[format] != 0;
 566 }
 567
 568 static void
 569 i915_set_draw_region(struct intel_context *intel,
 570                      struct intel_region *color_regions[],
 571                      struct intel_region *depth_region,
 572                      GLuint num_regions)
 573 {
 574    struct i915_context *i915 = i915_context(&intel->ctx);
 575    struct gl_context *ctx = &intel->ctx;
 576    struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
 577    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 578    struct gl_renderbuffer *drb;
 579    struct intel_renderbuffer *idrb = NULL;
 580    GLuint value;
 581    struct i915_hw_state *state = &i915->state;
 582    uint32_t draw_x, draw_y, draw_offset;
 583
 584    if (state->draw_region != color_regions[0]) {
 585       intel_region_reference(&state->draw_region, color_regions[0]);
 586    }
 587    if (state->depth_region != depth_region) {
 588       intel_region_reference(&state->depth_region, depth_region);
 589    }
 590
 591    /*
 592     * Set stride/cpp values
 593     */
 594    i915_set_buf_info_for_region(&state->Buffer[I915_DESTREG_CBUFADDR0],
 595                                 color_regions[0], BUF_3D_ID_COLOR_BACK);
 596
 597    i915_set_buf_info_for_region(&state->Buffer[I915_DESTREG_DBUFADDR0],
 598                                 depth_region, BUF_3D_ID_DEPTH);
 599
 600    /*
 601     * Compute/set I915_DESTREG_DV1 value
 602     */
 603    value = (DSTORG_HORT_BIAS(0x8) |     /* .5 */
 604             DSTORG_VERT_BIAS(0x8) |     /* .5 */
 605             LOD_PRECLAMP_OGL | TEX_DEFAULT_COLOR_OGL);
 606    if (irb != NULL) {
 607       value |= i915_render_target_format_for_mesa_format[intel_rb_format(irb)];
 608    } else {
 609       value |= DV_PF_8888;
 610    }
 611
 612    if (depth_region && depth_region->cpp == 4) {
 613       value |= DEPTH_FRMT_24_FIXED_8_OTHER;
 614    }
 615    else {
 616       value |= DEPTH_FRMT_16_FIXED;
 617    }
 618    state->Buffer[I915_DESTREG_DV1] = value;
 619
 620    drb = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
 621    if (!drb)
 622       drb = ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
 623
 624    if (drb)
 625       idrb = intel_renderbuffer(drb);
 626
 627    /* We set up the drawing rectangle to be offset into the color
 628     * region's location in the miptree.  If it doesn't match with
 629     * depth's offsets, we can't render to it.
 630     *
 631     * (Well, not actually true -- the hw grew a bit to let depth's
 632     * offset get forced to 0,0.  We may want to use that if people are
 633     * hitting that case.  Also, some configurations may be supportable
 634     * by tweaking the start offset of the buffers around, which we
 635     * can't do in general due to tiling)
 636     */
 637    FALLBACK(intel, I915_FALLBACK_DRAW_OFFSET,
 638             idrb && irb && (idrb->draw_x != irb->draw_x ||
 639                             idrb->draw_y != irb->draw_y));
 640
 641    if (irb) {
 642       draw_x = irb->draw_x;
 643       draw_y = irb->draw_y;
 644    } else if (idrb) {
 645       draw_x = idrb->draw_x;
 646       draw_y = idrb->draw_y;
 647    } else {
 648       draw_x = 0;
 649       draw_y = 0;
 650    }
 651
 652    draw_offset = (draw_y << 16) | draw_x;
 653
 654    FALLBACK(intel, I915_FALLBACK_DRAW_OFFSET,
 655             (ctx->DrawBuffer->Width + draw_x > 2048) ||
 656             (ctx->DrawBuffer->Height + draw_y > 2048));
 657    /* When changing drawing rectangle offset, an MI_FLUSH is first required. */
 658    if (draw_offset != i915->last_draw_offset) {
 659       state->Buffer[I915_DESTREG_DRAWRECT0] = MI_FLUSH | INHIBIT_FLUSH_RENDER_CACHE;
 660       i915->last_draw_offset = draw_offset;
 661    } else
 662       state->Buffer[I915_DESTREG_DRAWRECT0] = MI_NOOP;
 663
 664    state->Buffer[I915_DESTREG_DRAWRECT1] = _3DSTATE_DRAWRECT_INFO;
 665    state->Buffer[I915_DESTREG_DRAWRECT2] = 0;
 666    state->Buffer[I915_DESTREG_DRAWRECT3] = draw_offset;
 667    state->Buffer[I915_DESTREG_DRAWRECT4] =
 668       ((ctx->DrawBuffer->Width + draw_x - 1) & 0xffff) |
 669       ((ctx->DrawBuffer->Height + draw_y - 1) << 16);
 670    state->Buffer[I915_DESTREG_DRAWRECT5] = draw_offset;
 671
 672    I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 673 }
 674
 675 static void
 676 i915_update_color_write_enable(struct i915_context *i915, bool enable)
 677 {
 678    uint32_t dw = i915->state.Ctx[I915_CTXREG_LIS6];
 679    if (enable)
 680       dw |= S6_COLOR_WRITE_ENABLE;
 681    else
 682       dw &= ~S6_COLOR_WRITE_ENABLE;
 683    if (dw != i915->state.Ctx[I915_CTXREG_LIS6]) {
 684       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 685       i915->state.Ctx[I915_CTXREG_LIS6] = dw;
 686    }
 687 }
 688
 689 /**
 690  * Update the hardware state for drawing into a window or framebuffer object.
 691  *
 692  * Called by glDrawBuffer, glBindFramebufferEXT, MakeCurrent, and other
 693  * places within the driver.
 694  *
 695  * Basically, this needs to be called any time the current framebuffer
 696  * changes, the renderbuffers change, or we need to draw into different
 697  * color buffers.
 698  */
 699 static void
 700 i915_update_draw_buffer(struct intel_context *intel)
 701 {
 702    struct i915_context *i915 = (struct i915_context *)intel;
 703    struct gl_context *ctx = &intel->ctx;
 704    struct gl_framebuffer *fb = ctx->DrawBuffer;
 705    struct intel_region *colorRegion = NULL, *depthRegion = NULL;
 706    struct intel_renderbuffer *irbDepth = NULL, *irbStencil = NULL;
 707
 708    if (!fb) {
 709       /* this can happen during the initial context initialization */
 710       return;
 711    }
 712
 713    irbDepth = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 714    irbStencil = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 715
 716    /* Do this here, not core Mesa, since this function is called from
 717     * many places within the driver.
 718     */
 719    if (ctx->NewState & _NEW_BUFFERS) {
 720       /* this updates the DrawBuffer->_NumColorDrawBuffers fields, etc */
 721       _mesa_update_framebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer);
 722       /* this updates the DrawBuffer's Width/Height if it's a FBO */
 723       _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
 724    }
 725
 726    if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 727       /* this may occur when we're called by glBindFrameBuffer() during
 728        * the process of someone setting up renderbuffers, etc.
 729        */
 730       /*_mesa_debug(ctx, "DrawBuffer: incomplete user FBO\n");*/
 731       return;
 732    }
 733
 734    /* How many color buffers are we drawing into?
 735     *
 736     * If there is more than one drawbuffer (GL_FRONT_AND_BACK), or the
 737     * drawbuffers are too big, we have to fallback to software.
 738     */
 739    if ((fb->Width > ctx->Const.MaxRenderbufferSize)
 740        || (fb->Height > ctx->Const.MaxRenderbufferSize)) {
 741       FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, true);
 742    } else if (fb->_NumColorDrawBuffers > 1) {
 743       FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, true);
 744    } else {
 745       struct intel_renderbuffer *irb;
 746       irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
 747       colorRegion = (irb && irb->mt) ? irb->mt->region : NULL;
 748       FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, false);
 749    }
 750
 751    /* Check for depth fallback. */
 752    if (irbDepth && irbDepth->mt) {
 753       FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, false);
 754       depthRegion = irbDepth->mt->region;
 755    } else if (irbDepth && !irbDepth->mt) {
 756       FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, true);
 757       depthRegion = NULL;
 758    } else { /* !irbDepth */
 759       /* No fallback is needed because there is no depth buffer. */
 760       FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, false);
 761       depthRegion = NULL;
 762    }
 763
 764    /* Check for stencil fallback. */
 765    if (irbStencil && irbStencil->mt) {
 766       assert(intel_rb_format(irbStencil) == MESA_FORMAT_Z24_UNORM_S8_UINT);
 767       FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, false);
 768    } else if (irbStencil && !irbStencil->mt) {
 769       FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, true);
 770    } else { /* !irbStencil */
 771       /* No fallback is needed because there is no stencil buffer. */
 772       FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, false);
 773    }
 774
 775    /* If we have a (packed) stencil buffer attached but no depth buffer,
 776     * we still need to set up the shared depth/stencil state so we can use it.
 777     */
 778    if (depthRegion == NULL && irbStencil && irbStencil->mt
 779        && intel_rb_format(irbStencil) == MESA_FORMAT_Z24_UNORM_S8_UINT) {
 780       depthRegion = irbStencil->mt->region;
 781    }
 782
 783    /*
 784     * Update depth and stencil test state
 785     */
 786    ctx->Driver.Enable(ctx, GL_DEPTH_TEST, ctx->Depth.Test);
 787    ctx->Driver.Enable(ctx, GL_STENCIL_TEST, ctx->Stencil.Enabled);
 788
 789    i915_update_color_write_enable(i915, colorRegion != NULL);
 790
 791    intel->vtbl.set_draw_region(intel, &colorRegion, depthRegion,
 792                                fb->_NumColorDrawBuffers);
 793    intel->NewGLState |= _NEW_BUFFERS;
 794
 795    /* Set state we know depends on drawable parameters:
 796     */
 797    intelCalcViewport(ctx);
 798    ctx->Driver.Scissor(ctx);
 799
 800    /* Update culling direction which changes depending on the
 801     * orientation of the buffer:
 802     */
 803    ctx->Driver.FrontFace(ctx, ctx->Polygon.FrontFace);
 804 }
 805
 806 static void
 807 i915_new_batch(struct intel_context *intel)
 808 {
 809    struct i915_context *i915 = i915_context(&intel->ctx);
 810
 811    /* Mark all state as needing to be emitted when starting a new batchbuffer.
 812     * Using hardware contexts would be an alternative, but they have some
 813     * difficulties associated with them (physical address requirements).
 814     */
 815    i915->state.emitted = 0;
 816    i915->last_draw_offset = 0;
 817    i915->last_sampler = 0;
 818
 819    i915->current_vb_bo = NULL;
 820    i915->current_vertex_size = 0;
 821 }
 822
 823 static void
 824 i915_assert_not_dirty( struct intel_context *intel )
 825 {
 826    struct i915_context *i915 = i915_context(&intel->ctx);
 827    GLuint dirty = get_dirty(&i915->state);
 828    assert(!dirty);
 829    (void) dirty;
 830 }
 831
 832 static void
 833 i915_invalidate_state(struct intel_context *intel, GLuint new_state)
 834 {
 835    struct gl_context *ctx = &intel->ctx;
 836
 837    _swsetup_InvalidateState(ctx, new_state);
 838    _tnl_InvalidateState(ctx, new_state);
 839    _tnl_invalidate_vertex_state(ctx, new_state);
 840 }
 841
 842 void
 843 i915InitVtbl(struct i915_context *i915)
 844 {
 845    i915->intel.vtbl.check_vertex_size = i915_check_vertex_size;
 846    i915->intel.vtbl.destroy = i915_destroy_context;
 847    i915->intel.vtbl.emit_state = i915_emit_state;
 848    i915->intel.vtbl.new_batch = i915_new_batch;
 849    i915->intel.vtbl.reduced_primitive_state = i915_reduced_primitive_state;
 850    i915->intel.vtbl.render_start = i915_render_start;
 851    i915->intel.vtbl.render_prevalidate = i915_render_prevalidate;
 852    i915->intel.vtbl.set_draw_region = i915_set_draw_region;
 853    i915->intel.vtbl.update_draw_buffer = i915_update_draw_buffer;
 854    i915->intel.vtbl.update_texture_state = i915UpdateTextureState;
 855    i915->intel.vtbl.assert_not_dirty = i915_assert_not_dirty;
 856    i915->intel.vtbl.finish_batch = intel_finish_vb;
 857    i915->intel.vtbl.invalidate_state = i915_invalidate_state;
 858    i915->intel.vtbl.render_target_supported = i915_render_target_supported;
 859 }