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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 #include "intel_screen.h"
  29 #include "intel_context.h"
  30 #include "intel_blit.h"
  31 #include "intel_buffers.h"
  32 #include "intel_depthstencil.h"
  33 #include "intel_fbo.h"
  34 #include "intel_tris.h"
  35 #include "intel_regions.h"
  36 #include "intel_batchbuffer.h"
  37 #include "intel_reg.h"
  38 #include "context.h"
  39 #include "utils.h"
  40 #include "drirenderbuffer.h"
  41 #include "framebuffer.h"
  42 #include "swrast/swrast.h"
  43 #include "vblank.h"
  44
  45
  46 /* This block can be removed when libdrm >= 2.3.1 is required */
  47
  48 #ifndef DRM_VBLANK_FLIP
  49
  50 #define DRM_VBLANK_FLIP 0x8000000
  51
  52 typedef struct drm_i915_flip {
  53    int pipes;
  54 } drm_i915_flip_t;
  55
  56 #undef DRM_IOCTL_I915_FLIP
  57 #define DRM_IOCTL_I915_FLIP DRM_IOW(DRM_COMMAND_BASE + DRM_I915_FLIP, \
  58                                     drm_i915_flip_t)
  59
  60 #endif
  61
  62
  63 /**
  64  * XXX move this into a new dri/common/cliprects.c file.
  65  */
  66 GLboolean
  67 intel_intersect_cliprects(drm_clip_rect_t * dst,
  68                           const drm_clip_rect_t * a,
  69                           const drm_clip_rect_t * b)
  70 {
  71    GLint bx = b->x1;
  72    GLint by = b->y1;
  73    GLint bw = b->x2 - bx;
  74    GLint bh = b->y2 - by;
  75
  76    if (bx < a->x1)
  77       bw -= a->x1 - bx, bx = a->x1;
  78    if (by < a->y1)
  79       bh -= a->y1 - by, by = a->y1;
  80    if (bx + bw > a->x2)
  81       bw = a->x2 - bx;
  82    if (by + bh > a->y2)
  83       bh = a->y2 - by;
  84    if (bw <= 0)
  85       return GL_FALSE;
  86    if (bh <= 0)
  87       return GL_FALSE;
  88
  89    dst->x1 = bx;
  90    dst->y1 = by;
  91    dst->x2 = bx + bw;
  92    dst->y2 = by + bh;
  93
  94    return GL_TRUE;
  95 }
  96
  97 /**
  98  * Return pointer to current color drawing region, or NULL.
  99  */
 100 struct intel_region *
 101 intel_drawbuf_region(struct intel_context *intel)
 102 {
 103    struct intel_renderbuffer *irbColor =
 104       intel_renderbuffer(intel->ctx.DrawBuffer->_ColorDrawBuffers[0][0]);
 105    if (irbColor)
 106       return irbColor->region;
 107    else
 108       return NULL;
 109 }
 110
 111 /**
 112  * Return pointer to current color reading region, or NULL.
 113  */
 114 struct intel_region *
 115 intel_readbuf_region(struct intel_context *intel)
 116 {
 117    struct intel_renderbuffer *irb
 118       = intel_renderbuffer(intel->ctx.ReadBuffer->_ColorReadBuffer);
 119    if (irb)
 120       return irb->region;
 121    else
 122       return NULL;
 123 }
 124
 125
 126
 127 /**
 128  * Update the following fields for rendering to a user-created FBO:
 129  *   intel->numClipRects
 130  *   intel->pClipRects
 131  *   intel->drawX
 132  *   intel->drawY
 133  */
 134 static void
 135 intelSetRenderbufferClipRects(struct intel_context *intel)
 136 {
 137    assert(intel->ctx.DrawBuffer->Width > 0);
 138    assert(intel->ctx.DrawBuffer->Height > 0);
 139    intel->fboRect.x1 = 0;
 140    intel->fboRect.y1 = 0;
 141    intel->fboRect.x2 = intel->ctx.DrawBuffer->Width;
 142    intel->fboRect.y2 = intel->ctx.DrawBuffer->Height;
 143    intel->numClipRects = 1;
 144    intel->pClipRects = &intel->fboRect;
 145    intel->drawX = 0;
 146    intel->drawY = 0;
 147 }
 148
 149
 150 /**
 151  * As above, but for rendering to front buffer of a window.
 152  * \sa intelSetRenderbufferClipRects
 153  */
 154 static void
 155 intelSetFrontClipRects(struct intel_context *intel)
 156 {
 157    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 158
 159    if (!dPriv)
 160       return;
 161
 162    intel->numClipRects = dPriv->numClipRects;
 163    intel->pClipRects = dPriv->pClipRects;
 164    intel->drawX = dPriv->x;
 165    intel->drawY = dPriv->y;
 166 }
 167
 168
 169 /**
 170  * As above, but for rendering to back buffer of a window.
 171  */
 172 static void
 173 intelSetBackClipRects(struct intel_context *intel)
 174 {
 175    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 176    struct intel_framebuffer *intel_fb;
 177
 178    if (!dPriv)
 179       return;
 180
 181    intel_fb = dPriv->driverPrivate;
 182
 183    if (intel_fb->pf_active || dPriv->numBackClipRects == 0) {
 184       /* use the front clip rects */
 185       intel->numClipRects = dPriv->numClipRects;
 186       intel->pClipRects = dPriv->pClipRects;
 187       intel->drawX = dPriv->x;
 188       intel->drawY = dPriv->y;
 189    }
 190    else {
 191       /* use the back clip rects */
 192       intel->numClipRects = dPriv->numBackClipRects;
 193       intel->pClipRects = dPriv->pBackClipRects;
 194       intel->drawX = dPriv->backX;
 195       intel->drawY = dPriv->backY;
 196    }
 197 }
 198
 199
 200 /**
 201  * This will be called whenever the currently bound window is moved/resized.
 202  * XXX: actually, it seems to NOT be called when the window is only moved (BP).
 203  */
 204 void
 205 intelWindowMoved(struct intel_context *intel)
 206 {
 207    GLcontext *ctx = &intel->ctx;
 208    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 209    struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 210
 211    if (!intel->ctx.DrawBuffer) {
 212       /* when would this happen? -BP */
 213       intelSetFrontClipRects(intel);
 214    }
 215    else if (intel->ctx.DrawBuffer->Name != 0) {
 216       /* drawing to user-created FBO - do nothing */
 217       /* Cliprects would be set from intelDrawBuffer() */
 218    }
 219    else {
 220       /* drawing to a window */
 221       switch (intel_fb->Base._ColorDrawBufferMask[0]) {
 222       case BUFFER_BIT_FRONT_LEFT:
 223          intelSetFrontClipRects(intel);
 224          break;
 225       case BUFFER_BIT_BACK_LEFT:
 226          intelSetBackClipRects(intel);
 227          break;
 228       default:
 229          /* glDrawBuffer(GL_NONE or GL_FRONT_AND_BACK): software fallback */
 230          intelSetFrontClipRects(intel);
 231       }
 232    }
 233
 234    if (intel->intelScreen->driScrnPriv->ddxMinor >= 7) {
 235       drmI830Sarea *sarea = intel->sarea;
 236       drm_clip_rect_t drw_rect = { .x1 = dPriv->x, .x2 = dPriv->x + dPriv->w,
 237                                    .y1 = dPriv->y, .y2 = dPriv->y + dPriv->h };
 238       drm_clip_rect_t planeA_rect = { .x1 = sarea->planeA_x, .y1 = sarea->planeA_y,
 239                                      .x2 = sarea->planeA_x + sarea->planeA_w,
 240                                      .y2 = sarea->planeA_y + sarea->planeA_h };
 241       drm_clip_rect_t planeB_rect = { .x1 = sarea->planeB_x, .y1 = sarea->planeB_y,
 242                                      .x2 = sarea->planeB_x + sarea->planeB_w,
 243                                      .y2 = sarea->planeB_y + sarea->planeB_h };
 244       GLint areaA = driIntersectArea( drw_rect, planeA_rect );
 245       GLint areaB = driIntersectArea( drw_rect, planeB_rect );
 246       GLuint flags = intel_fb->vblank_flags;
 247       GLboolean pf_active;
 248       GLint pf_planes;
 249
 250       /* Update page flipping info
 251        */
 252       pf_planes = 0;
 253
 254       if (areaA > 0)
 255          pf_planes |= 1;
 256
 257       if (areaB > 0)
 258          pf_planes |= 2;
 259
 260       intel_fb->pf_current_page = (intel->sarea->pf_current_page >>
 261                                    (intel_fb->pf_planes & 0x2)) & 0x3;
 262
 263       intel_fb->pf_num_pages = intel->intelScreen->third.handle ? 3 : 2;
 264
 265       pf_active = pf_planes && (pf_planes & intel->sarea->pf_active) == pf_planes;
 266
 267       if (INTEL_DEBUG & DEBUG_LOCK)
 268          if (pf_active != intel_fb->pf_active)
 269             _mesa_printf("%s - Page flipping %sactive\n", __progname,
 270                          pf_active ? "" : "in");
 271
 272       if (pf_active) {
 273          /* Sync pages between planes if flipping on both at the same time */
 274          if (pf_planes == 0x3 && pf_planes != intel_fb->pf_planes &&
 275              (intel->sarea->pf_current_page & 0x3) !=
 276              (((intel->sarea->pf_current_page) >> 2) & 0x3)) {
 277             drm_i915_flip_t flip;
 278
 279             if (intel_fb->pf_current_page ==
 280                 (intel->sarea->pf_current_page & 0x3)) {
 281                /* XXX: This is ugly, but emitting two flips 'in a row' can cause
 282                 * lockups for unknown reasons.
 283                 */
 284                intel->sarea->pf_current_page =
 285                   intel->sarea->pf_current_page & 0x3;
 286                intel->sarea->pf_current_page |=
 287                   ((intel_fb->pf_current_page + intel_fb->pf_num_pages - 1) %
 288                    intel_fb->pf_num_pages) << 2;
 289
 290                flip.pipes = 0x2;
 291             } else {
 292                intel->sarea->pf_current_page =
 293                   intel->sarea->pf_current_page & (0x3 << 2);
 294                intel->sarea->pf_current_page |=
 295                   (intel_fb->pf_current_page + intel_fb->pf_num_pages - 1) %
 296                   intel_fb->pf_num_pages;
 297
 298                flip.pipes = 0x1;
 299             }
 300
 301             drmCommandWrite(intel->driFd, DRM_I915_FLIP, &flip, sizeof(flip));
 302          }
 303
 304          intel_fb->pf_planes = pf_planes;
 305       }
 306
 307       intel_fb->pf_active = pf_active;
 308       intel_flip_renderbuffers(intel_fb);
 309       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 310
 311       /* Update vblank info
 312        */
 313       if (areaB > areaA || (areaA == areaB && areaB > 0)) {
 314          flags = intel_fb->vblank_flags | VBLANK_FLAG_SECONDARY;
 315       } else {
 316          flags = intel_fb->vblank_flags & ~VBLANK_FLAG_SECONDARY;
 317       }
 318
 319       if (flags != intel_fb->vblank_flags && intel_fb->vblank_flags &&
 320           !(intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ)) {
 321          drmVBlank vbl;
 322          int i;
 323
 324          vbl.request.type = DRM_VBLANK_ABSOLUTE;
 325
 326          if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 327             vbl.request.type |= DRM_VBLANK_SECONDARY;
 328          }
 329
 330          for (i = 0; i < intel_fb->pf_num_pages; i++) {
 331             if (!intel_fb->color_rb[i] ||
 332                 (intel_fb->vbl_waited - intel_fb->color_rb[i]->vbl_pending) <=
 333                 (1<<23))
 334                continue;
 335
 336             vbl.request.sequence = intel_fb->color_rb[i]->vbl_pending;
 337             drmWaitVBlank(intel->driFd, &vbl);
 338          }
 339
 340          intel_fb->vblank_flags = flags;
 341          driGetCurrentVBlank(dPriv, intel_fb->vblank_flags, &intel_fb->vbl_seq);
 342          intel_fb->vbl_waited = intel_fb->vbl_seq;
 343
 344          for (i = 0; i < intel_fb->pf_num_pages; i++) {
 345             if (intel_fb->color_rb[i])
 346                intel_fb->color_rb[i]->vbl_pending = intel_fb->vbl_waited;
 347          }
 348       }
 349    } else {
 350       intel_fb->vblank_flags &= ~VBLANK_FLAG_SECONDARY;
 351    }
 352
 353    /* Update Mesa's notion of window size */
 354    driUpdateFramebufferSize(ctx, dPriv);
 355    intel_fb->Base.Initialized = GL_TRUE; /* XXX remove someday */
 356
 357    /* Update hardware scissor */
 358    ctx->Driver.Scissor(ctx, ctx->Scissor.X, ctx->Scissor.Y,
 359                        ctx->Scissor.Width, ctx->Scissor.Height);
 360
 361    /* Re-calculate viewport related state */
 362    ctx->Driver.DepthRange( ctx, ctx->Viewport.Near, ctx->Viewport.Far );
 363 }
 364
 365
 366
 367 /* A true meta version of this would be very simple and additionally
 368  * machine independent.  Maybe we'll get there one day.
 369  */
 370 static void
 371 intelClearWithTris(struct intel_context *intel, GLbitfield mask)
 372 {
 373    GLcontext *ctx = &intel->ctx;
 374    struct gl_framebuffer *fb = ctx->DrawBuffer;
 375    drm_clip_rect_t clear;
 376
 377    if (INTEL_DEBUG & DEBUG_BLIT)
 378       _mesa_printf("%s 0x%x\n", __FUNCTION__, mask);
 379
 380    LOCK_HARDWARE(intel);
 381
 382    /* XXX FBO: was: intel->driDrawable->numClipRects */
 383    if (intel->numClipRects) {
 384       GLint cx, cy, cw, ch;
 385       GLuint buf;
 386
 387       intel->vtbl.install_meta_state(intel);
 388
 389       /* Get clear bounds after locking */
 390       cx = fb->_Xmin;
 391       cy = fb->_Ymin;
 392       ch = fb->_Ymax - cx;
 393       cw = fb->_Xmax - cy;
 394
 395       /* note: regardless of 'all', cx, cy, cw, ch are now correct */
 396       clear.x1 = cx;
 397       clear.y1 = cy;
 398       clear.x2 = cx + cw;
 399       clear.y2 = cy + ch;
 400
 401       /* Back and stencil cliprects are the same.  Try and do both
 402        * buffers at once:
 403        */
 404       if (mask &
 405           (BUFFER_BIT_BACK_LEFT | BUFFER_BIT_STENCIL | BUFFER_BIT_DEPTH)) {
 406          struct intel_region *backRegion =
 407             intel_get_rb_region(fb, BUFFER_BACK_LEFT);
 408          struct intel_region *depthRegion =
 409             intel_get_rb_region(fb, BUFFER_DEPTH);
 410          const GLuint clearColor = (backRegion && backRegion->cpp == 4)
 411             ? intel->ClearColor8888 : intel->ClearColor565;
 412
 413          intel->vtbl.meta_draw_region(intel, backRegion, depthRegion);
 414
 415          if (mask & BUFFER_BIT_BACK_LEFT)
 416             intel->vtbl.meta_color_mask(intel, GL_TRUE);
 417          else
 418             intel->vtbl.meta_color_mask(intel, GL_FALSE);
 419
 420          if (mask & BUFFER_BIT_STENCIL)
 421             intel->vtbl.meta_stencil_replace(intel,
 422                                              intel->ctx.Stencil.WriteMask[0],
 423                                              intel->ctx.Stencil.Clear);
 424          else
 425             intel->vtbl.meta_no_stencil_write(intel);
 426
 427          if (mask & BUFFER_BIT_DEPTH)
 428             intel->vtbl.meta_depth_replace(intel);
 429          else
 430             intel->vtbl.meta_no_depth_write(intel);
 431
 432          /* XXX: Using INTEL_BATCH_NO_CLIPRECTS here is dangerous as the
 433           * drawing origin may not be correctly emitted.
 434           */
 435          intel_meta_draw_quad(intel, clear.x1, clear.x2, clear.y1, clear.y2, intel->ctx.Depth.Clear, clearColor, 0, 0, 0, 0);   /* texcoords */
 436
 437          mask &=
 438             ~(BUFFER_BIT_BACK_LEFT | BUFFER_BIT_STENCIL | BUFFER_BIT_DEPTH);
 439       }
 440
 441       /* clear the remaining (color) renderbuffers */
 442       for (buf = 0; buf < BUFFER_COUNT && mask; buf++) {
 443          const GLuint bufBit = 1 << buf;
 444          if (mask & bufBit) {
 445             struct intel_renderbuffer *irbColor =
 446                intel_renderbuffer(fb->Attachment[buf].Renderbuffer);
 447             GLuint color = (irbColor->region->cpp == 4)
 448                ? intel->ClearColor8888 : intel->ClearColor565;
 449
 450             ASSERT(irbColor);
 451
 452             intel->vtbl.meta_no_depth_write(intel);
 453             intel->vtbl.meta_no_stencil_write(intel);
 454             intel->vtbl.meta_color_mask(intel, GL_TRUE);
 455             intel->vtbl.meta_draw_region(intel, irbColor->region, NULL);
 456
 457             /* XXX: Using INTEL_BATCH_NO_CLIPRECTS here is dangerous as the
 458              * drawing origin may not be correctly emitted.
 459              */
 460             intel_meta_draw_quad(intel, clear.x1, clear.x2, clear.y1, clear.y2, 0,      /* depth clear val */
 461                                  color, 0, 0, 0, 0);    /* texcoords */
 462
 463             mask &= ~bufBit;
 464          }
 465       }
 466
 467       intel->vtbl.leave_meta_state(intel);
 468       intel_batchbuffer_flush(intel->batch);
 469    }
 470    UNLOCK_HARDWARE(intel);
 471 }
 472
 473
 474
 475
 476 /**
 477  * Copy the window contents named by dPriv to the rotated (or reflected)
 478  * color buffer.
 479  * srcBuf is BUFFER_BIT_FRONT_LEFT or BUFFER_BIT_BACK_LEFT to indicate the source.
 480  */
 481 void
 482 intelRotateWindow(struct intel_context *intel,
 483                   __DRIdrawablePrivate * dPriv, GLuint srcBuf)
 484 {
 485    intelScreenPrivate *screen = intel->intelScreen;
 486    drm_clip_rect_t fullRect;
 487    struct intel_framebuffer *intel_fb;
 488    struct intel_region *src;
 489    const drm_clip_rect_t *clipRects;
 490    int numClipRects;
 491    int i;
 492    GLenum format, type;
 493
 494    int xOrig, yOrig;
 495    int origNumClipRects;
 496    drm_clip_rect_t *origRects;
 497
 498    /*
 499     * set up hardware state
 500     */
 501    intelFlush(&intel->ctx);
 502
 503    LOCK_HARDWARE(intel);
 504
 505    if (!intel->numClipRects) {
 506       UNLOCK_HARDWARE(intel);
 507       return;
 508    }
 509
 510    intel->vtbl.install_meta_state(intel);
 511
 512    intel->vtbl.meta_no_depth_write(intel);
 513    intel->vtbl.meta_no_stencil_write(intel);
 514    intel->vtbl.meta_color_mask(intel, GL_FALSE);
 515
 516
 517    /* save current drawing origin and cliprects (restored at end) */
 518    xOrig = intel->drawX;
 519    yOrig = intel->drawY;
 520    origNumClipRects = intel->numClipRects;
 521    origRects = intel->pClipRects;
 522
 523    /*
 524     * set drawing origin, cliprects for full-screen access to rotated screen
 525     */
 526    fullRect.x1 = 0;
 527    fullRect.y1 = 0;
 528    fullRect.x2 = screen->rotatedWidth;
 529    fullRect.y2 = screen->rotatedHeight;
 530    intel->drawX = 0;
 531    intel->drawY = 0;
 532    intel->numClipRects = 1;
 533    intel->pClipRects = &fullRect;
 534
 535    intel->vtbl.meta_draw_region(intel, screen->rotated_region, NULL);    /* ? */
 536
 537    intel_fb = dPriv->driverPrivate;
 538
 539    if ((srcBuf == BUFFER_BIT_BACK_LEFT && !intel_fb->pf_active)) {
 540       src = intel_get_rb_region(&intel_fb->Base, BUFFER_BACK_LEFT);
 541       clipRects = dPriv->pBackClipRects;
 542       numClipRects = dPriv->numBackClipRects;
 543    }
 544    else {
 545       src = intel_get_rb_region(&intel_fb->Base, BUFFER_FRONT_LEFT);
 546       clipRects = dPriv->pClipRects;
 547       numClipRects = dPriv->numClipRects;
 548    }
 549
 550    if (src->cpp == 4) {
 551       format = GL_BGRA;
 552       type = GL_UNSIGNED_BYTE;
 553    }
 554    else {
 555       format = GL_BGR;
 556       type = GL_UNSIGNED_SHORT_5_6_5_REV;
 557    }
 558
 559    /* set the whole screen up as a texture to avoid alignment issues */
 560    intel->vtbl.meta_tex_rect_source(intel,
 561                                     src->buffer,
 562                                     screen->width,
 563                                     screen->height, src->pitch, format, type);
 564
 565    intel->vtbl.meta_texture_blend_replace(intel);
 566
 567    /*
 568     * loop over the source window's cliprects
 569     */
 570    for (i = 0; i < numClipRects; i++) {
 571       int srcX0 = clipRects[i].x1;
 572       int srcY0 = clipRects[i].y1;
 573       int srcX1 = clipRects[i].x2;
 574       int srcY1 = clipRects[i].y2;
 575       GLfloat verts[4][2], tex[4][2];
 576       int j;
 577
 578       /* build vertices for four corners of clip rect */
 579       verts[0][0] = srcX0;
 580       verts[0][1] = srcY0;
 581       verts[1][0] = srcX1;
 582       verts[1][1] = srcY0;
 583       verts[2][0] = srcX1;
 584       verts[2][1] = srcY1;
 585       verts[3][0] = srcX0;
 586       verts[3][1] = srcY1;
 587
 588       /* .. and texcoords */
 589       tex[0][0] = srcX0;
 590       tex[0][1] = srcY0;
 591       tex[1][0] = srcX1;
 592       tex[1][1] = srcY0;
 593       tex[2][0] = srcX1;
 594       tex[2][1] = srcY1;
 595       tex[3][0] = srcX0;
 596       tex[3][1] = srcY1;
 597
 598       /* transform coords to rotated screen coords */
 599
 600       for (j = 0; j < 4; j++) {
 601          matrix23TransformCoordf(&screen->rotMatrix,
 602                                  &verts[j][0], &verts[j][1]);
 603       }
 604
 605       /* draw polygon to map source image to dest region */
 606       intel_meta_draw_poly(intel, 4, verts, 0, 0, tex);
 607
 608    }                            /* cliprect loop */
 609
 610    intel->vtbl.leave_meta_state(intel);
 611    intel_batchbuffer_flush(intel->batch);
 612
 613    /* restore original drawing origin and cliprects */
 614    intel->drawX = xOrig;
 615    intel->drawY = yOrig;
 616    intel->numClipRects = origNumClipRects;
 617    intel->pClipRects = origRects;
 618
 619    UNLOCK_HARDWARE(intel);
 620 }
 621
 622
 623 /**
 624  * Called by ctx->Driver.Clear.
 625  */
 626 static void
 627 intelClear(GLcontext *ctx, GLbitfield mask)
 628 {
 629    struct intel_context *intel = intel_context(ctx);
 630    const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask);
 631    GLbitfield tri_mask = 0;
 632    GLbitfield blit_mask = 0;
 633    GLbitfield swrast_mask = 0;
 634    struct gl_framebuffer *fb = ctx->DrawBuffer;
 635    GLuint i;
 636
 637    if (0)
 638       fprintf(stderr, "%s\n", __FUNCTION__);
 639
 640    /* HW color buffers (front, back, aux, generic FBO, etc) */
 641    if (colorMask == ~0) {
 642       /* clear all R,G,B,A */
 643       /* XXX FBO: need to check if colorbuffers are software RBOs! */
 644       blit_mask |= (mask & BUFFER_BITS_COLOR);
 645    }
 646    else {
 647       /* glColorMask in effect */
 648       tri_mask |= (mask & BUFFER_BITS_COLOR);
 649    }
 650
 651    /* HW stencil */
 652    if (mask & BUFFER_BIT_STENCIL) {
 653       const struct intel_region *stencilRegion
 654          = intel_get_rb_region(fb, BUFFER_STENCIL);
 655       if (stencilRegion) {
 656          /* have hw stencil */
 657          if ((ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
 658             /* not clearing all stencil bits, so use triangle clearing */
 659             tri_mask |= BUFFER_BIT_STENCIL;
 660          }
 661          else {
 662             /* clearing all stencil bits, use blitting */
 663             blit_mask |= BUFFER_BIT_STENCIL;
 664          }
 665       }
 666    }
 667
 668    /* HW depth */
 669    if (mask & BUFFER_BIT_DEPTH) {
 670       /* clear depth with whatever method is used for stencil (see above) */
 671       if (tri_mask & BUFFER_BIT_STENCIL)
 672          tri_mask |= BUFFER_BIT_DEPTH;
 673       else
 674          blit_mask |= BUFFER_BIT_DEPTH;
 675    }
 676
 677    /* SW fallback clearing */
 678    swrast_mask = mask & ~tri_mask & ~blit_mask;
 679
 680    for (i = 0; i < BUFFER_COUNT; i++) {
 681       GLuint bufBit = 1 << i;
 682       if ((blit_mask | tri_mask) & bufBit) {
 683          if (!fb->Attachment[i].Renderbuffer->ClassID) {
 684             blit_mask &= ~bufBit;
 685             tri_mask &= ~bufBit;
 686             swrast_mask |= bufBit;
 687          }
 688       }
 689    }
 690
 691
 692    intelFlush(ctx);             /* XXX intelClearWithBlit also does this */
 693
 694    if (blit_mask)
 695       intelClearWithBlit(ctx, blit_mask);
 696
 697    if (tri_mask)
 698       intelClearWithTris(intel, tri_mask);
 699
 700    if (swrast_mask)
 701       _swrast_Clear(ctx, swrast_mask);
 702 }
 703
 704
 705 /* Emit wait for pending flips */
 706 void
 707 intel_wait_flips(struct intel_context *intel, GLuint batch_flags)
 708 {
 709    struct intel_framebuffer *intel_fb =
 710       (struct intel_framebuffer *) intel->ctx.DrawBuffer;
 711    struct intel_renderbuffer *intel_rb =
 712       intel_get_renderbuffer(&intel_fb->Base,
 713                              intel_fb->Base._ColorDrawBufferMask[0] ==
 714                              BUFFER_BIT_FRONT_LEFT ? BUFFER_FRONT_LEFT :
 715                              BUFFER_BACK_LEFT);
 716
 717    if (intel_fb->Base.Name == 0 && intel_rb->pf_pending == intel_fb->pf_seq) {
 718       GLint pf_planes = intel_fb->pf_planes;
 719       BATCH_LOCALS;
 720
 721       /* Wait for pending flips to take effect */
 722       BEGIN_BATCH(2, batch_flags);
 723       OUT_BATCH(pf_planes & 0x1 ? (MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP)
 724                 : 0);
 725       OUT_BATCH(pf_planes & 0x2 ? (MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_B_FLIP)
 726                 : 0);
 727       ADVANCE_BATCH();
 728
 729       intel_rb->pf_pending--;
 730    }
 731 }
 732
 733
 734 /* Flip the front & back buffers
 735  */
 736 static GLboolean
 737 intelPageFlip(const __DRIdrawablePrivate * dPriv)
 738 {
 739    struct intel_context *intel;
 740    int ret;
 741    struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 742
 743    if (INTEL_DEBUG & DEBUG_IOCTL)
 744       fprintf(stderr, "%s\n", __FUNCTION__);
 745
 746    assert(dPriv);
 747    assert(dPriv->driContextPriv);
 748    assert(dPriv->driContextPriv->driverPrivate);
 749
 750    intel = (struct intel_context *) dPriv->driContextPriv->driverPrivate;
 751
 752    if (intel->intelScreen->drmMinor < 9)
 753       return GL_FALSE;
 754
 755    intelFlush(&intel->ctx);
 756
 757    ret = 0;
 758
 759    LOCK_HARDWARE(intel);
 760
 761    if (dPriv->numClipRects && intel_fb->pf_active) {
 762       drm_i915_flip_t flip;
 763
 764       flip.pipes = intel_fb->pf_planes;
 765
 766       ret = drmCommandWrite(intel->driFd, DRM_I915_FLIP, &flip, sizeof(flip));
 767    }
 768
 769    UNLOCK_HARDWARE(intel);
 770
 771    if (ret || !intel_fb->pf_active)
 772       return GL_FALSE;
 773
 774    if (!dPriv->numClipRects) {
 775       usleep(10000);    /* throttle invisible client 10ms */
 776    }
 777
 778    intel_fb->pf_current_page = (intel->sarea->pf_current_page >>
 779                                 (intel_fb->pf_planes & 0x2)) & 0x3;
 780
 781    if (dPriv->numClipRects != 0) {
 782       intel_get_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT)->pf_pending =
 783       intel_get_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT)->pf_pending =
 784          ++intel_fb->pf_seq;
 785    }
 786
 787    intel_flip_renderbuffers(intel_fb);
 788    intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 789
 790    return GL_TRUE;
 791 }
 792
 793 #if 0
 794 void
 795 intelSwapBuffers(__DRIdrawablePrivate * dPriv)
 796 {
 797    if (dPriv->driverPrivate) {
 798       const struct gl_framebuffer *fb
 799          = (struct gl_framebuffer *) dPriv->driverPrivate;
 800       if (fb->Visual.doubleBufferMode) {
 801          GET_CURRENT_CONTEXT(ctx);
 802          if (ctx && ctx->DrawBuffer == fb) {
 803             _mesa_notifySwapBuffers(ctx);       /* flush pending rendering */
 804          }
 805          if (intel->doPageFlip) {
 806             intelPageFlip(dPriv);
 807          }
 808          else {
 809             intelCopyBuffer(dPriv);
 810          }
 811       }
 812    }
 813    else {
 814       _mesa_problem(NULL,
 815                     "dPriv has no gl_framebuffer pointer in intelSwapBuffers");
 816    }
 817 }
 818 #else
 819 /* Trunk version:
 820  */
 821
 822 static GLboolean
 823 intelScheduleSwap(const __DRIdrawablePrivate * dPriv, GLboolean *missed_target)
 824 {
 825    struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 826    unsigned int interval = driGetVBlankInterval(dPriv, intel_fb->vblank_flags);
 827    struct intel_context *intel =
 828       intelScreenContext(dPriv->driScreenPriv->private);
 829    const intelScreenPrivate *intelScreen = intel->intelScreen;
 830    unsigned int target;
 831    drm_i915_vblank_swap_t swap;
 832    GLboolean ret;
 833
 834    if (!intel_fb->vblank_flags ||
 835        (intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ) ||
 836        intelScreen->current_rotation != 0 ||
 837        intelScreen->drmMinor < (intel_fb->pf_active ? 9 : 6))
 838       return GL_FALSE;
 839
 840    swap.seqtype = DRM_VBLANK_ABSOLUTE;
 841
 842    if (intel_fb->vblank_flags & VBLANK_FLAG_SYNC) {
 843       swap.seqtype |= DRM_VBLANK_NEXTONMISS;
 844    } else if (interval == 0) {
 845       return GL_FALSE;
 846    }
 847
 848    swap.drawable = dPriv->hHWDrawable;
 849    target = swap.sequence = intel_fb->vbl_seq + interval;
 850
 851    if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 852       swap.seqtype |= DRM_VBLANK_SECONDARY;
 853    }
 854
 855    LOCK_HARDWARE(intel);
 856
 857    intel_batchbuffer_flush(intel->batch);
 858
 859    if ( intel_fb->pf_active ) {
 860       swap.seqtype |= DRM_VBLANK_FLIP;
 861
 862       intel_fb->pf_current_page = (((intel->sarea->pf_current_page >>
 863                                      (intel_fb->pf_planes & 0x2)) & 0x3) + 1) %
 864                                   intel_fb->pf_num_pages;
 865    }
 866
 867    if (!drmCommandWriteRead(intel->driFd, DRM_I915_VBLANK_SWAP, &swap,
 868                             sizeof(swap))) {
 869       intel_fb->vbl_seq = swap.sequence;
 870       swap.sequence -= target;
 871       *missed_target = swap.sequence > 0 && swap.sequence <= (1 << 23);
 872
 873       intel_get_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT)->vbl_pending =
 874          intel_get_renderbuffer(&intel_fb->Base,
 875                                 BUFFER_FRONT_LEFT)->vbl_pending =
 876          intel_fb->vbl_seq;
 877
 878       if (swap.seqtype & DRM_VBLANK_FLIP) {
 879          intel_flip_renderbuffers(intel_fb);
 880          intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 881       }
 882
 883       ret = GL_TRUE;
 884    } else {
 885       if (swap.seqtype & DRM_VBLANK_FLIP) {
 886          intel_fb->pf_current_page = ((intel->sarea->pf_current_page >>
 887                                         (intel_fb->pf_planes & 0x2)) & 0x3) %
 888                                      intel_fb->pf_num_pages;
 889       }
 890
 891       ret = GL_FALSE;
 892    }
 893
 894    UNLOCK_HARDWARE(intel);
 895
 896    return ret;
 897 }
 898
 899 void
 900 intelSwapBuffers(__DRIdrawablePrivate * dPriv)
 901 {
 902    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 903       GET_CURRENT_CONTEXT(ctx);
 904       struct intel_context *intel;
 905
 906       if (ctx == NULL)
 907          return;
 908
 909       intel = intel_context(ctx);
 910
 911       if (ctx->Visual.doubleBufferMode) {
 912          intelScreenPrivate *screen = intel->intelScreen;
 913          GLboolean missed_target;
 914          struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 915          int64_t ust;
 916
 917          _mesa_notifySwapBuffers(ctx);  /* flush pending rendering comands */
 918
 919          if (screen->current_rotation != 0 ||
 920              !intelScheduleSwap(dPriv, &missed_target)) {
 921             driWaitForVBlank(dPriv, &intel_fb->vbl_seq, intel_fb->vblank_flags,
 922                              &missed_target);
 923
 924             if (screen->current_rotation != 0 || !intelPageFlip(dPriv)) {
 925                intelCopyBuffer(dPriv, NULL);
 926             }
 927
 928             if (screen->current_rotation != 0) {
 929                intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
 930             }
 931          }
 932
 933          intel_fb->swap_count++;
 934          (*dri_interface->getUST) (&ust);
 935          if (missed_target) {
 936             intel_fb->swap_missed_count++;
 937             intel_fb->swap_missed_ust = ust - intel_fb->swap_ust;
 938          }
 939
 940          intel_fb->swap_ust = ust;
 941       }
 942    }
 943    else {
 944       /* XXX this shouldn't be an error but we can't handle it for now */
 945       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 946    }
 947 }
 948 #endif
 949
 950 void
 951 intelCopySubBuffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 952 {
 953    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 954       struct intel_context *intel =
 955          (struct intel_context *) dPriv->driContextPriv->driverPrivate;
 956       GLcontext *ctx = &intel->ctx;
 957
 958       if (ctx->Visual.doubleBufferMode) {
 959          drm_clip_rect_t rect;
 960          rect.x1 = x + dPriv->x;
 961          rect.y1 = (dPriv->h - y - h) + dPriv->y;
 962          rect.x2 = rect.x1 + w;
 963          rect.y2 = rect.y1 + h;
 964          _mesa_notifySwapBuffers(ctx);  /* flush pending rendering comands */
 965          intelCopyBuffer(dPriv, &rect);
 966       }
 967    }
 968    else {
 969       /* XXX this shouldn't be an error but we can't handle it for now */
 970       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 971    }
 972 }
 973
 974
 975 /**
 976  * Update the hardware state for drawing into a window or framebuffer object.
 977  *
 978  * Called by glDrawBuffer, glBindFramebufferEXT, MakeCurrent, and other
 979  * places within the driver.
 980  *
 981  * Basically, this needs to be called any time the current framebuffer
 982  * changes, the renderbuffers change, or we need to draw into different
 983  * color buffers.
 984  */
 985 void
 986 intel_draw_buffer(GLcontext * ctx, struct gl_framebuffer *fb)
 987 {
 988    struct intel_context *intel = intel_context(ctx);
 989    struct intel_region *colorRegion, *depthRegion = NULL;
 990    struct intel_renderbuffer *irbDepth = NULL, *irbStencil = NULL;
 991    int front = 0;               /* drawing to front color buffer? */
 992
 993    if (!fb) {
 994       /* this can happen during the initial context initialization */
 995       return;
 996    }
 997
 998    /* Do this here, note core Mesa, since this function is called from
 999     * many places within the driver.
1000     */
1001    if (ctx->NewState & (_NEW_BUFFERS | _NEW_COLOR | _NEW_PIXEL)) {
1002       /* this updates the DrawBuffer->_NumColorDrawBuffers fields, etc */
1003       _mesa_update_framebuffer(ctx);
1004       /* this updates the DrawBuffer's Width/Height if it's a FBO */
1005       _mesa_update_draw_buffer_bounds(ctx);
1006    }
1007
1008    if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
1009       /* this may occur when we're called by glBindFrameBuffer() during
1010        * the process of someone setting up renderbuffers, etc.
1011        */
1012       /*_mesa_debug(ctx, "DrawBuffer: incomplete user FBO\n");*/
1013       return;
1014    }
1015
1016    if (fb->Name)
1017       intel_validate_paired_depth_stencil(ctx, fb);
1018
1019    /*
1020     * How many color buffers are we drawing into?
1021     */
1022    if (fb->_NumColorDrawBuffers[0] != 1
1023 #if 0
1024        /* XXX FBO temporary - always use software rendering */
1025        || 1
1026 #endif
1027       ) {
1028       /* writing to 0 or 2 or 4 color buffers */
1029       /*_mesa_debug(ctx, "Software rendering\n");*/
1030       FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, GL_TRUE);
1031       front = 1;                /* might not have back color buffer */
1032    }
1033    else {
1034       /* draw to exactly one color buffer */
1035       /*_mesa_debug(ctx, "Hardware rendering\n");*/
1036       FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, GL_FALSE);
1037       if (fb->_ColorDrawBufferMask[0] == BUFFER_BIT_FRONT_LEFT) {
1038          front = 1;
1039       }
1040    }
1041
1042    /*
1043     * Get the intel_renderbuffer for the colorbuffer we're drawing into.
1044     * And set up cliprects.
1045     */
1046    if (fb->Name == 0) {
1047       /* drawing to window system buffer */
1048       if (front) {
1049          intelSetFrontClipRects(intel);
1050          colorRegion = intel_get_rb_region(fb, BUFFER_FRONT_LEFT);
1051       }
1052       else {
1053          intelSetBackClipRects(intel);
1054          colorRegion = intel_get_rb_region(fb, BUFFER_BACK_LEFT);
1055       }
1056    }
1057    else {
1058       /* drawing to user-created FBO */
1059       struct intel_renderbuffer *irb;
1060       intelSetRenderbufferClipRects(intel);
1061       irb = intel_renderbuffer(fb->_ColorDrawBuffers[0][0]);
1062       colorRegion = (irb && irb->region) ? irb->region : NULL;
1063    }
1064
1065    /* Update culling direction which changes depending on the
1066     * orientation of the buffer:
1067     */
1068    if (ctx->Driver.FrontFace)
1069       ctx->Driver.FrontFace(ctx, ctx->Polygon.FrontFace);
1070    else
1071       ctx->NewState |= _NEW_POLYGON;
1072
1073    if (!colorRegion) {
1074       FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, GL_TRUE);
1075    }
1076    else {
1077       FALLBACK(intel, INTEL_FALLBACK_DRAW_BUFFER, GL_FALSE);
1078    }
1079
1080    /***
1081     *** Get depth buffer region and check if we need a software fallback.
1082     *** Note that the depth buffer is usually a DEPTH_STENCIL buffer.
1083     ***/
1084    if (fb->_DepthBuffer && fb->_DepthBuffer->Wrapped) {
1085       irbDepth = intel_renderbuffer(fb->_DepthBuffer->Wrapped);
1086       if (irbDepth && irbDepth->region) {
1087          FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, GL_FALSE);
1088          depthRegion = irbDepth->region;
1089       }
1090       else {
1091          FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, GL_TRUE);
1092          depthRegion = NULL;
1093       }
1094    }
1095    else {
1096       /* not using depth buffer */
1097       FALLBACK(intel, INTEL_FALLBACK_DEPTH_BUFFER, GL_FALSE);
1098       depthRegion = NULL;
1099    }
1100
1101    /***
1102     *** Stencil buffer
1103     *** This can only be hardware accelerated if we're using a
1104     *** combined DEPTH_STENCIL buffer (for now anyway).
1105     ***/
1106    if (fb->_StencilBuffer && fb->_StencilBuffer->Wrapped) {
1107       irbStencil = intel_renderbuffer(fb->_StencilBuffer->Wrapped);
1108       if (irbStencil && irbStencil->region) {
1109          ASSERT(irbStencil->Base._ActualFormat == GL_DEPTH24_STENCIL8_EXT);
1110          FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, GL_FALSE);
1111          /* need to re-compute stencil hw state */
1112          ctx->Driver.Enable(ctx, GL_STENCIL_TEST, ctx->Stencil.Enabled);
1113          if (!depthRegion)
1114             depthRegion = irbStencil->region;
1115       }
1116       else {
1117          FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, GL_TRUE);
1118       }
1119    }
1120    else {
1121       /* XXX FBO: instead of FALSE, pass ctx->Stencil.Enabled ??? */
1122       FALLBACK(intel, INTEL_FALLBACK_STENCIL_BUFFER, GL_FALSE);
1123       /* need to re-compute stencil hw state */
1124       ctx->Driver.Enable(ctx, GL_STENCIL_TEST, ctx->Stencil.Enabled);
1125    }
1126
1127    /*
1128     * Update depth test state
1129     */
1130    if (ctx->Depth.Test && fb->Visual.depthBits > 0) {
1131       ctx->Driver.Enable(ctx, GL_DEPTH_TEST, GL_TRUE);
1132    }
1133    else {
1134       ctx->Driver.Enable(ctx, GL_DEPTH_TEST, GL_FALSE);
1135    }
1136
1137    /**
1138     ** Release old regions, reference new regions
1139     **/
1140 #if 0                           /* XXX FBO: this seems to be redundant with i915_state_draw_region() */
1141    if (intel->draw_region != colorRegion) {
1142       intel_region_release(&intel->draw_region);
1143       intel_region_reference(&intel->draw_region, colorRegion);
1144    }
1145    if (intel->intelScreen->depth_region != depthRegion) {
1146       intel_region_release(&intel->intelScreen->depth_region);
1147       intel_region_reference(&intel->intelScreen->depth_region, depthRegion);
1148    }
1149 #endif
1150
1151    intel->vtbl.set_draw_region(intel, colorRegion, depthRegion);
1152
1153    /* update viewport since it depends on window size */
1154    ctx->Driver.Viewport(ctx, ctx->Viewport.X, ctx->Viewport.Y,
1155                         ctx->Viewport.Width, ctx->Viewport.Height);
1156
1157    /* Update hardware scissor */
1158    ctx->Driver.Scissor(ctx, ctx->Scissor.X, ctx->Scissor.Y,
1159                        ctx->Scissor.Width, ctx->Scissor.Height);
1160 }
1161
1162
1163 static void
1164 intelDrawBuffer(GLcontext * ctx, GLenum mode)
1165 {
1166    intel_draw_buffer(ctx, ctx->DrawBuffer);
1167 }
1168
1169
1170 static void
1171 intelReadBuffer(GLcontext * ctx, GLenum mode)
1172 {
1173    if (ctx->ReadBuffer == ctx->DrawBuffer) {
1174       /* This will update FBO completeness status.
1175        * A framebuffer will be incomplete if the GL_READ_BUFFER setting
1176        * refers to a missing renderbuffer.  Calling glReadBuffer can set
1177        * that straight and can make the drawing buffer complete.
1178        */
1179       intel_draw_buffer(ctx, ctx->DrawBuffer);
1180    }
1181    /* Generally, functions which read pixels (glReadPixels, glCopyPixels, etc)
1182     * reference ctx->ReadBuffer and do appropriate state checks.
1183     */
1184 }
1185
1186
1187 void
1188 intelInitBufferFuncs(struct dd_function_table *functions)
1189 {
1190    functions->Clear = intelClear;
1191    functions->DrawBuffer = intelDrawBuffer;
1192    functions->ReadBuffer = intelReadBuffer;
1193 }