src/gallium/state_trackers/xorg/xorg_dri2.c

   1 /*
   2  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  *
  26  * Author: Alan Hourihane <alanh@tungstengraphics.com>
  27  * Author: Jakob Bornecrantz <wallbraker@gmail.com>
  28  *
  29  */
  30
  31 #include "xorg-server.h"
  32 #include "xf86.h"
  33 #include "xf86_OSproc.h"
  34
  35 #include "xorg_tracker.h"
  36 #include "xorg_exa.h"
  37
  38 #include "dri2.h"
  39
  40 #include "pipe/p_state.h"
  41 #include "util/u_inlines.h"
  42
  43 #include "util/u_format.h"
  44
  45 #include "state_tracker/drm_driver.h"
  46
  47 /* Make all the #if cases in the code esier to read */
  48 #ifndef DRI2INFOREC_VERSION
  49 #define DRI2INFOREC_VERSION 1
  50 #endif
  51
  52 #if DRI2INFOREC_VERSION == 2
  53 static Bool set_format_in_do_create_buffer;
  54 #endif
  55
  56 typedef struct {
  57     PixmapPtr pPixmap;
  58     struct pipe_resource *tex;
  59     struct pipe_fence_handle *fence;
  60 } *BufferPrivatePtr;
  61
  62 static Bool
  63 dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int format)
  64 {
  65     struct pipe_resource *tex = NULL;
  66     ScreenPtr pScreen = pDraw->pScreen;
  67     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  68     modesettingPtr ms = modesettingPTR(pScrn);
  69     struct exa_pixmap_priv *exa_priv;
  70     BufferPrivatePtr private = buffer->driverPrivate;
  71     PixmapPtr pPixmap;
  72     struct winsys_handle whandle;
  73
  74     if (pDraw->type == DRAWABLE_PIXMAP)
  75         pPixmap = (PixmapPtr) pDraw;
  76     else
  77         pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
  78     exa_priv = exaGetPixmapDriverPrivate(pPixmap);
  79
  80
  81     switch (buffer->attachment) {
  82     default:
  83         if (buffer->attachment != DRI2BufferFakeFrontLeft ||
  84             pDraw->type != DRAWABLE_PIXMAP) {
  85             private->pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
  86                                                         pDraw->height,
  87                                                         pDraw->depth,
  88                                                         0);
  89         }
  90         break;
  91     case DRI2BufferFrontLeft:
  92         break;
  93     case DRI2BufferStencil:
  94 #if DRI2INFOREC_VERSION >= 3
  95     case DRI2BufferDepthStencil:
  96 #else
  97     /* Works on old X servers because sanity checking is for the weak */
  98     case 9:
  99 #endif
 100         if (exa_priv->depth_stencil_tex &&
 101             !util_format_is_depth_or_stencil(exa_priv->depth_stencil_tex->format))
 102             exa_priv->depth_stencil_tex = NULL;
 103         /* Fall through */
 104     case DRI2BufferDepth:
 105         if (exa_priv->depth_stencil_tex)
 106             pipe_resource_reference(&tex, exa_priv->depth_stencil_tex);
 107         else {
 108             struct pipe_resource template;
 109             unsigned depthBits = (format != 0) ? format : pDraw->depth;
 110             memset(&template, 0, sizeof(template));
 111             template.target = PIPE_TEXTURE_2D;
 112             if (buffer->attachment == DRI2BufferDepth) {
 113                switch(depthBits) {
 114                case 16:
 115                   template.format = PIPE_FORMAT_Z16_UNORM;
 116                   break;
 117                case 32:
 118                   template.format = PIPE_FORMAT_Z32_UNORM;
 119                   break;
 120                default:
 121                   template.format = ms->ds_depth_bits_last ?
 122                                     PIPE_FORMAT_Z24X8_UNORM : PIPE_FORMAT_X8Z24_UNORM;
 123                   break;
 124                }
 125             } else {
 126                template.format = ms->ds_depth_bits_last ?
 127                                  PIPE_FORMAT_Z24_UNORM_S8_USCALED : PIPE_FORMAT_S8_USCALED_Z24_UNORM;
 128             }
 129             template.width0 = pDraw->width;
 130             template.height0 = pDraw->height;
 131             template.depth0 = 1;
 132             template.last_level = 0;
 133             template.bind = PIPE_BIND_DEPTH_STENCIL |
 134                 PIPE_BIND_SHARED;
 135             tex = ms->screen->resource_create(ms->screen, &template);
 136             pipe_resource_reference(&exa_priv->depth_stencil_tex, tex);
 137         }
 138         break;
 139     }
 140
 141     if (!private->pPixmap) {
 142         private->pPixmap = pPixmap;
 143         pPixmap->refcnt++;
 144     }
 145
 146     if (!tex) {
 147         /* First call to make sure we have a pixmap private */
 148         exaMoveInPixmap(private->pPixmap);
 149         xorg_exa_set_shared_usage(private->pPixmap);
 150         pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
 151         /* Second call to make sure texture has valid contents */
 152         exaMoveInPixmap(private->pPixmap);
 153         tex = xorg_exa_get_texture(private->pPixmap);
 154     }
 155
 156     if (!tex)
 157         FatalError("NO TEXTURE IN DRI2\n");
 158
 159     memset(&whandle, 0, sizeof(whandle));
 160     whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 161
 162     ms->screen->resource_get_handle(ms->screen, tex, &whandle);
 163
 164     buffer->name = whandle.handle;
 165     buffer->pitch = whandle.stride;
 166     buffer->cpp = 4;
 167     buffer->driverPrivate = private;
 168     buffer->flags = 0; /* not tiled */
 169 #if DRI2INFOREC_VERSION == 2
 170     /* ABI forwards/backwards compatibility */
 171     if (set_format_in_do_create_buffer)
 172         ((DRI2Buffer2Ptr)buffer)->format = 0;
 173 #elif DRI2INFOREC_VERSION >= 3
 174     buffer->format = 0;
 175 #endif
 176     private->tex = tex;
 177
 178     return TRUE;
 179 }
 180
 181 static void
 182 dri2_do_destroy_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 183 {
 184     ScreenPtr pScreen = pDraw->pScreen;
 185     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 186     modesettingPtr ms = modesettingPTR(pScrn);
 187     BufferPrivatePtr private = buffer->driverPrivate;
 188     struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
 189
 190     pipe_resource_reference(&private->tex, NULL);
 191     ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 192     pipe_resource_reference(&exa_priv->depth_stencil_tex, NULL);
 193     (*pScreen->DestroyPixmap)(private->pPixmap);
 194 }
 195
 196 #if DRI2INFOREC_VERSION >= 2
 197
 198 static DRI2Buffer2Ptr
 199 dri2_create_buffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
 200 {
 201     DRI2Buffer2Ptr buffer;
 202     BufferPrivatePtr private;
 203
 204     buffer = calloc(1, sizeof *buffer);
 205     if (!buffer)
 206         return NULL;
 207
 208     private = calloc(1, sizeof *private);
 209     if (!private) {
 210         goto fail;
 211     }
 212
 213     buffer->attachment = attachment;
 214     buffer->driverPrivate = private;
 215
 216     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 217     if (dri2_do_create_buffer(pDraw, (DRI2BufferPtr)buffer, format))
 218         return buffer;
 219
 220     free(private);
 221 fail:
 222     free(buffer);
 223     return NULL;
 224 }
 225
 226 static void
 227 dri2_destroy_buffer(DrawablePtr pDraw, DRI2Buffer2Ptr buffer)
 228 {
 229     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 230     dri2_do_destroy_buffer(pDraw, (DRI2BufferPtr)buffer);
 231
 232     free(buffer->driverPrivate);
 233     free(buffer);
 234 }
 235
 236 #endif /* DRI2INFOREC_VERSION >= 2 */
 237
 238 #if DRI2INFOREC_VERSION <= 2
 239
 240 static DRI2BufferPtr
 241 dri2_create_buffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 242 {
 243     BufferPrivatePtr privates;
 244     DRI2BufferPtr buffers;
 245     int i;
 246
 247     buffers = calloc(count, sizeof *buffers);
 248     if (!buffers)
 249         goto fail_buffers;
 250
 251     privates = calloc(count, sizeof *privates);
 252     if (!privates)
 253         goto fail_privates;
 254
 255     for (i = 0; i < count; i++) {
 256         buffers[i].attachment = attachments[i];
 257         buffers[i].driverPrivate = &privates[i];
 258
 259         if (!dri2_do_create_buffer(pDraw, &buffers[i], 0))
 260             goto fail;
 261     }
 262
 263     return buffers;
 264
 265 fail:
 266     free(privates);
 267 fail_privates:
 268     free(buffers);
 269 fail_buffers:
 270     return NULL;
 271 }
 272
 273 static void
 274 dri2_destroy_buffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 275 {
 276     int i;
 277
 278     for (i = 0; i < count; i++) {
 279         dri2_do_destroy_buffer(pDraw, &buffers[i]);
 280     }
 281
 282     if (buffers) {
 283         free(buffers[0].driverPrivate);
 284         free(buffers);
 285     }
 286 }
 287
 288 #endif /* DRI2INFOREC_VERSION <= 2 */
 289
 290 static void
 291 dri2_copy_region(DrawablePtr pDraw, RegionPtr pRegion,
 292                  DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 293 {
 294     ScreenPtr pScreen = pDraw->pScreen;
 295     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 296     modesettingPtr ms = modesettingPTR(pScrn);
 297     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 298     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 299     DrawablePtr src_draw;
 300     DrawablePtr dst_draw;
 301     GCPtr gc;
 302     RegionPtr copy_clip;
 303     Bool save_accel;
 304     CustomizerPtr cust = ms->cust;
 305
 306     /*
 307      * In driCreateBuffers we dewrap windows into the
 308      * backing pixmaps in order to get to the texture.
 309      * We need to use the real drawable in CopyArea
 310      * so that cliprects and offsets are correct.
 311      */
 312     src_draw = (pSrcBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 313        &src_priv->pPixmap->drawable;
 314     dst_draw = (pDestBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 315        &dst_priv->pPixmap->drawable;
 316
 317     /*
 318      * The clients implements glXWaitX with a copy front to fake and then
 319      * waiting on the server to signal its completion of it. While
 320      * glXWaitGL is a client side flush and a copy from fake to front.
 321      * This is how it is done in the DRI2 protocol, how ever depending
 322      * which type of drawables the server does things a bit differently
 323      * then what the protocol says as the fake and front are the same.
 324      *
 325      * for pixmaps glXWaitX is a server flush.
 326      * for pixmaps glXWaitGL is a client flush.
 327      * for windows glXWaitX is a copy from front to fake then a server flush.
 328      * for windows glXWaitGL is a client flush then a copy from fake to front.
 329      *
 330      * XXX in the windows case this code always flushes but that isn't a
 331      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 332      * or a glFlush/glFinish call.
 333      */
 334     if (dst_priv->pPixmap == src_priv->pPixmap) {
 335         /* pixmap glXWaitX */
 336         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 337             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 338             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 339             return;
 340         }
 341         /* pixmap glXWaitGL */
 342         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 343             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 344             return;
 345         } else {
 346             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 347                 "copying between the same pixmap\n");
 348         }
 349     }
 350
 351     gc = GetScratchGC(pDraw->depth, pScreen);
 352     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 353     REGION_COPY(pScreen, copy_clip, pRegion);
 354     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 355     ValidateGC(dst_draw, gc);
 356
 357     /* If this is a full buffer swap, throttle on the previous one */
 358     if (ms->swapThrottling &&
 359         dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 360         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 361
 362         if (extents->x1 == 0 && extents->y1 == 0 &&
 363             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 364             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 365             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 366         }
 367     }
 368
 369     /* Try to make sure the blit will be accelerated */
 370     save_accel = ms->exa->accel;
 371     ms->exa->accel = TRUE;
 372
 373     /* In case it won't be though, make sure the GPU copy contents of the
 374      * source pixmap will be used for the software fallback - presumably the
 375      * client modified them before calling in here.
 376      */
 377     exaMoveInPixmap(src_priv->pPixmap);
 378     DamageRegionAppend(src_draw, pRegion);
 379     DamageRegionProcessPending(src_draw);
 380
 381    if (cust && cust->winsys_context_throttle)
 382        cust->winsys_context_throttle(cust, ms->ctx, THROTTLE_SWAP);
 383
 384     (*gc->ops->CopyArea)(src_draw, dst_draw, gc,
 385                          0, 0, pDraw->width, pDraw->height, 0, 0);
 386     ms->exa->accel = save_accel;
 387
 388     FreeScratchGC(gc);
 389
 390     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 391                    (pDestBuffer->attachment == DRI2BufferFrontLeft
 392                     && ms->swapThrottling) ?
 393                    &dst_priv->fence : NULL);
 394
 395    if (cust && cust->winsys_context_throttle)
 396        cust->winsys_context_throttle(cust, ms->ctx, THROTTLE_RENDER);
 397
 398 }
 399
 400 Bool
 401 xorg_dri2_init(ScreenPtr pScreen)
 402 {
 403     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 404     modesettingPtr ms = modesettingPTR(pScrn);
 405     DRI2InfoRec dri2info;
 406 #if DRI2INFOREC_VERSION >= 2
 407     int major, minor;
 408
 409     if (xf86LoaderCheckSymbol("DRI2Version")) {
 410         DRI2Version(&major, &minor);
 411     } else {
 412         /* Assume version 1.0 */
 413         major = 1;
 414         minor = 0;
 415     }
 416 #endif
 417
 418     dri2info.version = min(DRI2INFOREC_VERSION, 3);
 419     dri2info.fd = ms->fd;
 420
 421     dri2info.driverName = pScrn->driverName;
 422     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 423
 424 #if DRI2INFOREC_VERSION >= 2
 425     dri2info.CreateBuffer = dri2_create_buffer;
 426     dri2info.DestroyBuffer = dri2_destroy_buffer;
 427 #endif
 428
 429     /* For X servers in the 1.6.x series there where two DRI2 version.
 430      * This allows us to build one binary that works on both servers.
 431      */
 432 #if DRI2INFOREC_VERSION == 2
 433     if (minor == 0) {
 434         set_format_in_do_create_buffer = FALSE;
 435         dri2info.CreateBuffers = dri2_create_buffers;
 436         dri2info.DestroyBuffers = dri2_destroy_buffers;
 437     } else
 438         set_format_in_do_create_buffer = FALSE;
 439 #endif
 440
 441     /* For version 1 set these unconditionaly. */
 442 #if DRI2INFOREC_VERSION == 1
 443     dri2info.CreateBuffers = dri2_create_buffers;
 444     dri2info.DestroyBuffers = dri2_destroy_buffers;
 445 #endif
 446     dri2info.CopyRegion = dri2_copy_region;
 447     dri2info.Wait = NULL;
 448
 449     ms->d_depth_bits_last =
 450          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_Z24X8_UNORM,
 451                                          PIPE_TEXTURE_2D,
 452                                          0,
 453                                          PIPE_BIND_DEPTH_STENCIL, 0);
 454     ms->ds_depth_bits_last =
 455          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 456                                          PIPE_TEXTURE_2D,
 457                                          0,
 458                                          PIPE_BIND_DEPTH_STENCIL, 0);
 459
 460     return DRI2ScreenInit(pScreen, &dri2info);
 461 }
 462
 463 void
 464 xorg_dri2_close(ScreenPtr pScreen)
 465 {
 466     DRI2CloseScreen(pScreen);
 467 }
 468
 469 /* vim: set sw=4 ts=8 sts=4: */