src/gallium/drivers/svga/svga_state_framebuffer.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "util/u_inlines.h"
  27 #include "pipe/p_defines.h"
  28 #include "util/u_math.h"
  29 #include "util/u_format.h"
  30
  31 #include "svga_context.h"
  32 #include "svga_state.h"
  33 #include "svga_cmd.h"
  34 #include "svga_debug.h"
  35 #include "svga_screen.h"
  36 #include "svga_surface.h"
  37
  38
  39 /*
  40  * flush our command buffer after the 8th distinct render target
  41  *
  42  * This helps improve the surface cache behaviour in the face of the
  43  * large number of single-use render targets generated by EXA and the xorg
  44  * state tracker.  Without this we can reference hundreds of individual
  45  * render targets from a command buffer, which leaves little scope for
  46  * sharing or reuse of those targets.
  47  */
  48 #define MAX_RT_PER_BATCH 8
  49
  50
  51
  52 static enum pipe_error
  53 emit_fb_vgpu9(struct svga_context *svga)
  54 {
  55    struct svga_screen *svgascreen = svga_screen(svga->pipe.screen);
  56    const struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
  57    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
  58    boolean reemit = svga->rebind.flags.rendertargets;
  59    unsigned i;
  60    enum pipe_error ret;
  61
  62    assert(!svga_have_vgpu10(svga));
  63
  64    /*
  65     * We need to reemit non-null surface bindings, even when they are not
  66     * dirty, to ensure that the resources are paged in.
  67     */
  68
  69    for (i = 0; i < svgascreen->max_color_buffers; i++) {
  70       if ((curr->cbufs[i] != hw->cbufs[i]) || (reemit && hw->cbufs[i])) {
  71          if (svga->curr.nr_fbs++ > MAX_RT_PER_BATCH)
  72             return PIPE_ERROR_OUT_OF_MEMORY;
  73
  74          ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_COLOR0 + i,
  75                                       curr->cbufs[i]);
  76          if (ret != PIPE_OK)
  77             return ret;
  78
  79          pipe_surface_reference(&hw->cbufs[i], curr->cbufs[i]);
  80       }
  81    }
  82
  83    if ((curr->zsbuf != hw->zsbuf) || (reemit && hw->zsbuf)) {
  84       ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_DEPTH, curr->zsbuf);
  85       if (ret != PIPE_OK)
  86          return ret;
  87
  88       if (curr->zsbuf &&
  89           util_format_is_depth_and_stencil(curr->zsbuf->format)) {
  90          ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_STENCIL,
  91                                       curr->zsbuf);
  92          if (ret != PIPE_OK)
  93             return ret;
  94       }
  95       else {
  96          ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_STENCIL, NULL);
  97          if (ret != PIPE_OK)
  98             return ret;
  99       }
 100
 101       pipe_surface_reference(&hw->zsbuf, curr->zsbuf);
 102    }
 103
 104    return PIPE_OK;
 105 }
 106
 107
 108 /*
 109  * Rebind rendertargets.
 110  *
 111  * Similar to emit_framebuffer, but without any state checking/update.
 112  *
 113  * Called at the beginning of every new command buffer to ensure that
 114  * non-dirty rendertargets are properly paged-in.
 115  */
 116 static enum pipe_error
 117 svga_reemit_framebuffer_bindings_vgpu9(struct svga_context *svga)
 118 {
 119    struct svga_screen *svgascreen = svga_screen(svga->pipe.screen);
 120    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
 121    unsigned i;
 122    enum pipe_error ret;
 123
 124    assert(!svga_have_vgpu10(svga));
 125
 126    for (i = 0; i < svgascreen->max_color_buffers; i++) {
 127       if (hw->cbufs[i]) {
 128          ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_COLOR0 + i,
 129                                       hw->cbufs[i]);
 130          if (ret != PIPE_OK) {
 131             return ret;
 132          }
 133       }
 134    }
 135
 136    if (hw->zsbuf) {
 137       ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_DEPTH, hw->zsbuf);
 138       if (ret != PIPE_OK) {
 139          return ret;
 140       }
 141
 142       if (hw->zsbuf &&
 143           util_format_is_depth_and_stencil(hw->zsbuf->format)) {
 144          ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_STENCIL, hw->zsbuf);
 145          if (ret != PIPE_OK) {
 146             return ret;
 147          }
 148       }
 149       else {
 150          ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_STENCIL, NULL);
 151          if (ret != PIPE_OK) {
 152             return ret;
 153          }
 154       }
 155    }
 156
 157    return PIPE_OK;
 158 }
 159
 160
 161
 162 static enum pipe_error
 163 emit_fb_vgpu10(struct svga_context *svga)
 164 {
 165    const struct svga_screen *ss = svga_screen(svga->pipe.screen);
 166    struct pipe_surface *rtv[SVGA3D_MAX_RENDER_TARGETS];
 167    struct pipe_surface *dsv;
 168    struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
 169    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
 170    const unsigned num_color = MAX2(curr->nr_cbufs, hw->nr_cbufs);
 171    int last_rtv = -1;
 172    unsigned i;
 173    enum pipe_error ret = PIPE_OK;
 174
 175    assert(svga_have_vgpu10(svga));
 176
 177    /* Setup render targets array.  Note that we loop over the max of the
 178     * number of previously bound buffers and the new buffers to unbind
 179     * any previously bound buffers when the new number of buffers is less
 180     * than the old number of buffers.
 181     */
 182    for (i = 0; i < num_color; i++) {
 183       if (curr->cbufs[i]) {
 184          rtv[i] = svga_validate_surface_view(svga,
 185                                              svga_surface(curr->cbufs[i]));
 186          if (rtv[i] == NULL) {
 187             return PIPE_ERROR_OUT_OF_MEMORY;
 188          }
 189
 190          assert(svga_surface(rtv[i])->view_id != SVGA3D_INVALID_ID);
 191          last_rtv = i;
 192       }
 193       else {
 194          rtv[i] = NULL;
 195       }
 196    }
 197
 198    /* Setup depth stencil view */
 199    if (curr->zsbuf) {
 200       dsv = svga_validate_surface_view(svga, svga_surface(curr->zsbuf));
 201       if (!dsv) {
 202          return PIPE_ERROR_OUT_OF_MEMORY;
 203       }
 204    }
 205    else {
 206       dsv = NULL;
 207    }
 208
 209    /* avoid emitting redundant SetRenderTargets command */
 210    if ((num_color != svga->state.hw_draw.num_rendertargets) ||
 211        (dsv != svga->state.hw_draw.dsv) ||
 212        memcmp(rtv, svga->state.hw_draw.rtv, num_color * sizeof(rtv[0]))) {
 213
 214       ret = SVGA3D_vgpu10_SetRenderTargets(svga->swc, num_color, rtv, dsv);
 215       if (ret != PIPE_OK)
 216          return ret;
 217
 218       /* number of render targets sent to the device, not including trailing
 219        * unbound render targets.
 220        */
 221       svga->state.hw_draw.num_rendertargets = last_rtv + 1;
 222       svga->state.hw_draw.dsv = dsv;
 223       memcpy(svga->state.hw_draw.rtv, rtv, num_color * sizeof(rtv[0]));
 224
 225       for (i = 0; i < ss->max_color_buffers; i++) {
 226          if (hw->cbufs[i] != curr->cbufs[i]) {
 227             /* propagate the backed view surface before unbinding it */
 228             if (hw->cbufs[i] && svga_surface(hw->cbufs[i])->backed) {
 229                svga_propagate_surface(svga,
 230                                       &svga_surface(hw->cbufs[i])->backed->base);
 231             }
 232             pipe_surface_reference(&hw->cbufs[i], curr->cbufs[i]);
 233          }
 234       }
 235       hw->nr_cbufs = curr->nr_cbufs;
 236
 237       if (hw->zsbuf != curr->zsbuf) {
 238          /* propagate the backed view surface before unbinding it */
 239          if (hw->zsbuf && svga_surface(hw->zsbuf)->backed) {
 240             svga_propagate_surface(svga, &svga_surface(hw->zsbuf)->backed->base);
 241          }
 242          pipe_surface_reference(&hw->zsbuf, curr->zsbuf);
 243       }
 244    }
 245
 246    return ret;
 247 }
 248
 249
 250 static enum pipe_error
 251 emit_framebuffer(struct svga_context *svga, unsigned dirty)
 252 {
 253    if (svga_have_vgpu10(svga)) {
 254       return emit_fb_vgpu10(svga);
 255    }
 256    else {
 257       return emit_fb_vgpu9(svga);
 258    }
 259 }
 260
 261
 262 /*
 263  * Rebind rendertargets.
 264  *
 265  * Similar to emit_framebuffer, but without any state checking/update.
 266  *
 267  * Called at the beginning of every new command buffer to ensure that
 268  * non-dirty rendertargets are properly paged-in.
 269  */
 270 enum pipe_error
 271 svga_reemit_framebuffer_bindings(struct svga_context *svga)
 272 {
 273    enum pipe_error ret;
 274
 275    assert(svga->rebind.flags.rendertargets);
 276
 277    if (svga_have_vgpu10(svga)) {
 278       ret = emit_fb_vgpu10(svga);
 279    }
 280    else {
 281       ret = svga_reemit_framebuffer_bindings_vgpu9(svga);
 282    }
 283
 284    svga->rebind.flags.rendertargets = FALSE;
 285
 286    return ret;
 287 }
 288
 289
 290 /*
 291  * Send a private allocation command to page in rendertargets resource.
 292  */
 293 enum pipe_error
 294 svga_rebind_framebuffer_bindings(struct svga_context *svga)
 295 {
 296    struct svga_hw_draw_state *hw = &svga->state.hw_draw;
 297    unsigned i;
 298    enum pipe_error ret;
 299
 300    assert(svga_have_vgpu10(svga));
 301
 302    if (!svga->rebind.flags.rendertargets)
 303       return PIPE_OK;
 304
 305    for (i = 0; i < hw->num_rendertargets; i++) {
 306       if (hw->rtv[i]) {
 307          ret = svga->swc->resource_rebind(svga->swc,
 308                                           svga_surface(hw->rtv[i])->handle,
 309                                           NULL,
 310                                           SVGA_RELOC_WRITE);
 311          if (ret != PIPE_OK)
 312             return ret;
 313       }
 314    }
 315
 316    if (hw->dsv) {
 317       ret = svga->swc->resource_rebind(svga->swc,
 318                                        svga_surface(hw->dsv)->handle,
 319                                        NULL,
 320                                        SVGA_RELOC_WRITE);
 321       if (ret != PIPE_OK)
 322          return ret;
 323    }
 324
 325    svga->rebind.flags.rendertargets = 0;
 326
 327    return PIPE_OK;
 328 }
 329
 330
 331 struct svga_tracked_state svga_hw_framebuffer =
 332 {
 333    "hw framebuffer state",
 334    SVGA_NEW_FRAME_BUFFER,
 335    emit_framebuffer
 336 };
 337
 338
 339
 340
 341 /***********************************************************************
 342  */
 343
 344 static enum pipe_error
 345 emit_viewport( struct svga_context *svga,
 346                unsigned dirty )
 347 {
 348    const struct pipe_viewport_state *viewport = &svga->curr.viewport;
 349    struct svga_prescale prescale;
 350    SVGA3dRect rect;
 351    /* Not sure if this state is relevant with POSITIONT.  Probably
 352     * not, but setting to 0,1 avoids some state pingponging.
 353     */
 354    float range_min = 0.0;
 355    float range_max = 1.0;
 356    float flip = -1.0;
 357    boolean degenerate = FALSE;
 358    boolean invertY = FALSE;
 359    enum pipe_error ret;
 360
 361    float fb_width = (float) svga->curr.framebuffer.width;
 362    float fb_height = (float) svga->curr.framebuffer.height;
 363
 364    float fx =        viewport->scale[0] * -1.0f + viewport->translate[0];
 365    float fy = flip * viewport->scale[1] * -1.0f + viewport->translate[1];
 366    float fw =        viewport->scale[0] * 2.0f;
 367    float fh = flip * viewport->scale[1] * 2.0f;
 368    boolean emit_vgpu10_viewport = FALSE;
 369
 370    memset( &prescale, 0, sizeof(prescale) );
 371
 372    /* Examine gallium viewport transformation and produce a screen
 373     * rectangle and possibly vertex shader pre-transformation to
 374     * get the same results.
 375     */
 376
 377    SVGA_DBG(DEBUG_VIEWPORT,
 378             "\ninitial %f,%f %fx%f\n",
 379             fx,
 380             fy,
 381             fw,
 382             fh);
 383
 384    prescale.scale[0] = 1.0;
 385    prescale.scale[1] = 1.0;
 386    prescale.scale[2] = 1.0;
 387    prescale.scale[3] = 1.0;
 388    prescale.translate[0] = 0;
 389    prescale.translate[1] = 0;
 390    prescale.translate[2] = 0;
 391    prescale.translate[3] = 0;
 392
 393    /* Enable prescale to adjust vertex positions to match
 394       VGPU10 convention only if rasterization is enabled.
 395     */
 396    if (svga->curr.rast && svga->curr.rast->templ.rasterizer_discard) {
 397       degenerate = TRUE;
 398       goto out;
 399    } else {
 400       prescale.enabled = TRUE;
 401    }
 402
 403    if (fw < 0) {
 404       prescale.scale[0] *= -1.0f;
 405       prescale.translate[0] += -fw;
 406       fw = -fw;
 407       fx = viewport->scale[0] * 1.0f + viewport->translate[0];
 408    }
 409
 410    if (fh < 0.0) {
 411       if (svga_have_vgpu10(svga)) {
 412          /* floating point viewport params below */
 413          prescale.translate[1] = fh + fy * 2.0f;
 414       }
 415       else {
 416          /* integer viewport params below */
 417          prescale.translate[1] = fh - 1.0f + fy * 2.0f;
 418       }
 419       fh = -fh;
 420       fy -= fh;
 421       prescale.scale[1] = -1.0f;
 422       invertY = TRUE;
 423    }
 424
 425    if (fx < 0) {
 426       prescale.translate[0] += fx;
 427       prescale.scale[0] *= fw / (fw + fx);
 428       fw += fx;
 429       fx = 0.0f;
 430    }
 431
 432    if (fy < 0) {
 433       if (invertY) {
 434          prescale.translate[1] -= fy;
 435       }
 436       else {
 437          prescale.translate[1] += fy;
 438       }
 439       prescale.scale[1] *= fh / (fh + fy);
 440       fh += fy;
 441       fy = 0.0f;
 442    }
 443
 444    if (fx + fw > fb_width) {
 445       prescale.scale[0] *= fw / (fb_width - fx);
 446       prescale.translate[0] -= fx * (fw / (fb_width - fx));
 447       prescale.translate[0] += fx;
 448       fw = fb_width - fx;
 449    }
 450
 451    if (fy + fh > fb_height) {
 452       prescale.scale[1] *= fh / (fb_height - fy);
 453       if (invertY) {
 454          float in = fb_height - fy;       /* number of vp pixels inside view */
 455          float out = fy + fh - fb_height; /* number of vp pixels out of view */
 456          prescale.translate[1] += fy * out / in;
 457       }
 458       else {
 459          prescale.translate[1] -= fy * (fh / (fb_height - fy));
 460          prescale.translate[1] += fy;
 461       }
 462       fh = fb_height - fy;
 463    }
 464
 465    if (fw < 0 || fh < 0) {
 466       fw = fh = fx = fy = 0;
 467       degenerate = TRUE;
 468       goto out;
 469    }
 470
 471    /* D3D viewport is integer space.  Convert fx,fy,etc. to
 472     * integers.
 473     *
 474     * TODO: adjust pretranslate correct for any subpixel error
 475     * introduced converting to integers.
 476     */
 477    rect.x = (uint32) fx;
 478    rect.y = (uint32) fy;
 479    rect.w = (uint32) fw;
 480    rect.h = (uint32) fh;
 481
 482    SVGA_DBG(DEBUG_VIEWPORT,
 483             "viewport error %f,%f %fx%f\n",
 484             fabs((float)rect.x - fx),
 485             fabs((float)rect.y - fy),
 486             fabs((float)rect.w - fw),
 487             fabs((float)rect.h - fh));
 488
 489    SVGA_DBG(DEBUG_VIEWPORT,
 490             "viewport %d,%d %dx%d\n",
 491             rect.x,
 492             rect.y,
 493             rect.w,
 494             rect.h);
 495
 496    /* Finally, to get GL rasterization rules, need to tweak the
 497     * screen-space coordinates slightly relative to D3D which is
 498     * what hardware implements natively.
 499     */
 500    if (svga->curr.rast && svga->curr.rast->templ.half_pixel_center) {
 501       float adjust_x = 0.0;
 502       float adjust_y = 0.0;
 503
 504       if (svga_have_vgpu10(svga)) {
 505          /* Normally, we don't have to do any sub-pixel coordinate
 506           * adjustments for VGPU10.  But when we draw wide points with
 507           * a GS we need an X adjustment in order to be conformant.
 508           */
 509          if (svga->curr.reduced_prim == PIPE_PRIM_POINTS &&
 510              svga->curr.rast->pointsize > 1.0f) {
 511             adjust_x = 0.5;
 512          }
 513       }
 514       else {
 515          switch (svga->curr.reduced_prim) {
 516          case PIPE_PRIM_POINTS:
 517             adjust_x = -0.375;
 518             adjust_y = -0.75;
 519             break;
 520          case PIPE_PRIM_LINES:
 521             adjust_x = -0.5;
 522             adjust_y = 0;
 523             break;
 524          case PIPE_PRIM_TRIANGLES:
 525             adjust_x = -0.5;
 526             adjust_y = -0.5;
 527             break;
 528          default:
 529             /* nothing */
 530             break;
 531          }
 532       }
 533
 534       if (invertY)
 535          adjust_y = -adjust_y;
 536
 537       prescale.translate[0] += adjust_x;
 538       prescale.translate[1] += adjust_y;
 539       prescale.translate[2] = 0.5; /* D3D clip space */
 540       prescale.scale[2]     = 0.5; /* D3D clip space */
 541    }
 542
 543    range_min = viewport->scale[2] * -1.0f + viewport->translate[2];
 544    range_max = viewport->scale[2] *  1.0f + viewport->translate[2];
 545
 546    /* D3D (and by implication SVGA) doesn't like dealing with zmax
 547     * less than zmin.  Detect that case, flip the depth range and
 548     * invert our z-scale factor to achieve the same effect.
 549     */
 550    if (range_min > range_max) {
 551       float range_tmp;
 552       range_tmp = range_min;
 553       range_min = range_max;
 554       range_max = range_tmp;
 555       prescale.scale[2] = -prescale.scale[2];
 556    }
 557
 558    /* If zmin is less than 0, clamp zmin to 0 and adjust the prescale.
 559     * zmin can be set to -1 when viewport->scale[2] is set to 1 and
 560     * viewport->translate[2] is set to 0 in the blit code.
 561     */
 562    if (range_min < 0.0f) {
 563       range_min = -0.5f * viewport->scale[2] + 0.5f + viewport->translate[2];
 564       range_max = 0.5f * viewport->scale[2] + 0.5f + viewport->translate[2];
 565       prescale.scale[2] *= 2.0f;
 566       prescale.translate[2] -= 0.5f;
 567    }
 568
 569    if (prescale.enabled) {
 570       float H[2];
 571       float J[2];
 572       int i;
 573
 574       SVGA_DBG(DEBUG_VIEWPORT,
 575                "prescale %f,%f %fx%f\n",
 576                prescale.translate[0],
 577                prescale.translate[1],
 578                prescale.scale[0],
 579                prescale.scale[1]);
 580
 581       H[0] = (float)rect.w / 2.0f;
 582       H[1] = -(float)rect.h / 2.0f;
 583       J[0] = (float)rect.x + (float)rect.w / 2.0f;
 584       J[1] = (float)rect.y + (float)rect.h / 2.0f;
 585
 586       SVGA_DBG(DEBUG_VIEWPORT,
 587                "H %f,%f\n"
 588                "J %fx%f\n",
 589                H[0],
 590                H[1],
 591                J[0],
 592                J[1]);
 593
 594       /* Adjust prescale to take into account the fact that it is
 595        * going to be applied prior to the perspective divide and
 596        * viewport transformation.
 597        *
 598        * Vwin = H(Vc/Vc.w) + J
 599        *
 600        * We want to tweak Vwin with scale and translation from above,
 601        * as in:
 602        *
 603        * Vwin' = S Vwin + T
 604        *
 605        * But we can only modify the values at Vc.  Plugging all the
 606        * above together, and rearranging, eventually we get:
 607        *
 608        *   Vwin' = H(Vc'/Vc'.w) + J
 609        * where:
 610        *   Vc' = SVc + KVc.w
 611        *   K = (T + (S-1)J) / H
 612        *
 613        * Overwrite prescale.translate with values for K:
 614        */
 615       for (i = 0; i < 2; i++) {
 616          prescale.translate[i] = ((prescale.translate[i] +
 617                                    (prescale.scale[i] - 1.0f) * J[i]) / H[i]);
 618       }
 619
 620       SVGA_DBG(DEBUG_VIEWPORT,
 621                "clipspace %f,%f %fx%f\n",
 622                prescale.translate[0],
 623                prescale.translate[1],
 624                prescale.scale[0],
 625                prescale.scale[1]);
 626    }
 627
 628 out:
 629    if (degenerate) {
 630       rect.x = 0;
 631       rect.y = 0;
 632       rect.w = 1;
 633       rect.h = 1;
 634       prescale.enabled = FALSE;
 635    }
 636
 637    if (!svga_rects_equal(&rect, &svga->state.hw_clear.viewport)) {
 638       if (svga_have_vgpu10(svga)) {
 639          emit_vgpu10_viewport = TRUE;
 640       }
 641       else {
 642          ret = SVGA3D_SetViewport(svga->swc, &rect);
 643          if (ret != PIPE_OK)
 644             return ret;
 645
 646          svga->state.hw_clear.viewport = rect;
 647       }
 648    }
 649
 650    if (svga->state.hw_clear.depthrange.zmin != range_min ||
 651        svga->state.hw_clear.depthrange.zmax != range_max)
 652    {
 653       if (svga_have_vgpu10(svga)) {
 654          emit_vgpu10_viewport = TRUE;
 655       }
 656       else {
 657          ret = SVGA3D_SetZRange(svga->swc, range_min, range_max );
 658          if (ret != PIPE_OK)
 659             return ret;
 660
 661          svga->state.hw_clear.depthrange.zmin = range_min;
 662          svga->state.hw_clear.depthrange.zmax = range_max;
 663       }
 664    }
 665
 666    if (emit_vgpu10_viewport) {
 667       SVGA3dViewport vp;
 668       vp.x = (float) rect.x;
 669       vp.y = (float) rect.y;
 670       vp.width = (float) rect.w;
 671       vp.height = (float) rect.h;
 672       vp.minDepth = range_min;
 673       vp.maxDepth = range_max;
 674       ret = SVGA3D_vgpu10_SetViewports(svga->swc, 1, &vp);
 675       if (ret != PIPE_OK)
 676          return ret;
 677
 678       svga->state.hw_clear.viewport = rect;
 679
 680       svga->state.hw_clear.depthrange.zmin = range_min;
 681       svga->state.hw_clear.depthrange.zmax = range_max;
 682    }
 683
 684    if (memcmp(&prescale, &svga->state.hw_clear.prescale, sizeof prescale) != 0) {
 685       svga->dirty |= SVGA_NEW_PRESCALE;
 686       svga->state.hw_clear.prescale = prescale;
 687    }
 688
 689    return PIPE_OK;
 690 }
 691
 692
 693 struct svga_tracked_state svga_hw_viewport =
 694 {
 695    "hw viewport state",
 696    ( SVGA_NEW_FRAME_BUFFER |
 697      SVGA_NEW_VIEWPORT |
 698      SVGA_NEW_RAST |
 699      SVGA_NEW_REDUCED_PRIMITIVE ),
 700    emit_viewport
 701 };
 702
 703
 704 /***********************************************************************
 705  * Scissor state
 706  */
 707 static enum pipe_error
 708 emit_scissor_rect( struct svga_context *svga,
 709                    unsigned dirty )
 710 {
 711    const struct pipe_scissor_state *scissor = &svga->curr.scissor;
 712
 713    if (svga_have_vgpu10(svga)) {
 714       SVGASignedRect rect;
 715
 716       rect.left = scissor->minx;
 717       rect.top = scissor->miny;
 718       rect.right = scissor->maxx;
 719       rect.bottom = scissor->maxy;
 720
 721       return SVGA3D_vgpu10_SetScissorRects(svga->swc, 1, &rect);
 722    }
 723    else {
 724       SVGA3dRect rect;
 725
 726       rect.x = scissor->minx;
 727       rect.y = scissor->miny;
 728       rect.w = scissor->maxx - scissor->minx; /* + 1 ?? */
 729       rect.h = scissor->maxy - scissor->miny; /* + 1 ?? */
 730
 731       return SVGA3D_SetScissorRect(svga->swc, &rect);
 732    }
 733 }
 734
 735
 736 struct svga_tracked_state svga_hw_scissor =
 737 {
 738    "hw scissor state",
 739    SVGA_NEW_SCISSOR,
 740    emit_scissor_rect
 741 };
 742
 743
 744 /***********************************************************************
 745  * Userclip state
 746  */
 747
 748 static enum pipe_error
 749 emit_clip_planes( struct svga_context *svga,
 750                   unsigned dirty )
 751 {
 752    unsigned i;
 753    enum pipe_error ret;
 754
 755    /* TODO: just emit directly from svga_set_clip_state()?
 756     */
 757    for (i = 0; i < SVGA3D_MAX_CLIP_PLANES; i++) {
 758       /* need to express the plane in D3D-style coordinate space.
 759        * GL coords get converted to D3D coords with the matrix:
 760        * [ 1  0  0  0 ]
 761        * [ 0 -1  0  0 ]
 762        * [ 0  0  2  0 ]
 763        * [ 0  0 -1  1 ]
 764        * Apply that matrix to our plane equation, and invert Y.
 765        */
 766       float a = svga->curr.clip.ucp[i][0];
 767       float b = svga->curr.clip.ucp[i][1];
 768       float c = svga->curr.clip.ucp[i][2];
 769       float d = svga->curr.clip.ucp[i][3];
 770       float plane[4];
 771
 772       plane[0] = a;
 773       plane[1] = b;
 774       plane[2] = 2.0f * c;
 775       plane[3] = d - c;
 776
 777       if (svga_have_vgpu10(svga)) {
 778          //debug_printf("XXX emit DX10 clip plane\n");
 779          ret = PIPE_OK;
 780       }
 781       else {
 782          ret = SVGA3D_SetClipPlane(svga->swc, i, plane);
 783          if (ret != PIPE_OK)
 784             return ret;
 785       }
 786    }
 787
 788    return PIPE_OK;
 789 }
 790
 791
 792 struct svga_tracked_state svga_hw_clip_planes =
 793 {
 794    "hw viewport state",
 795    SVGA_NEW_CLIP,
 796    emit_clip_planes
 797 };