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_UINT : PIPE_FORMAT_S8_UINT_Z24_UNORM;
 128             }
 129             template.width0 = pDraw->width;
 130             template.height0 = pDraw->height;
 131             template.depth0 = 1;
 132             template.array_size = 1;
 133             template.last_level = 0;
 134             template.bind = PIPE_BIND_DEPTH_STENCIL |
 135                 PIPE_BIND_SHARED;
 136             tex = ms->screen->resource_create(ms->screen, &template);
 137             pipe_resource_reference(&exa_priv->depth_stencil_tex, tex);
 138         }
 139         break;
 140     }
 141
 142     if (!private->pPixmap) {
 143         private->pPixmap = pPixmap;
 144         pPixmap->refcnt++;
 145     }
 146
 147     if (!tex) {
 148         /* First call to make sure we have a pixmap private */
 149         exaMoveInPixmap(private->pPixmap);
 150         xorg_exa_set_shared_usage(private->pPixmap);
 151         pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
 152         /* Second call to make sure texture has valid contents */
 153         exaMoveInPixmap(private->pPixmap);
 154         tex = xorg_exa_get_texture(private->pPixmap);
 155     }
 156
 157     if (!tex)
 158         FatalError("NO TEXTURE IN DRI2\n");
 159
 160     memset(&whandle, 0, sizeof(whandle));
 161     whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 162
 163     ms->screen->resource_get_handle(ms->screen, tex, &whandle);
 164
 165     buffer->name = whandle.handle;
 166     buffer->pitch = whandle.stride;
 167     buffer->cpp = 4;
 168     buffer->driverPrivate = private;
 169     buffer->flags = 0; /* not tiled */
 170 #if DRI2INFOREC_VERSION == 2
 171     /* ABI forwards/backwards compatibility */
 172     if (set_format_in_do_create_buffer)
 173         ((DRI2Buffer2Ptr)buffer)->format = 0;
 174 #elif DRI2INFOREC_VERSION >= 3
 175     buffer->format = 0;
 176 #endif
 177     private->tex = tex;
 178
 179     return TRUE;
 180 }
 181
 182 static void
 183 dri2_do_destroy_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 184 {
 185     ScreenPtr pScreen = pDraw->pScreen;
 186     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 187     modesettingPtr ms = modesettingPTR(pScrn);
 188     BufferPrivatePtr private = buffer->driverPrivate;
 189     struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
 190
 191     pipe_resource_reference(&private->tex, NULL);
 192     ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 193     pipe_resource_reference(&exa_priv->depth_stencil_tex, NULL);
 194     (*pScreen->DestroyPixmap)(private->pPixmap);
 195 }
 196
 197 #if DRI2INFOREC_VERSION >= 2
 198
 199 static DRI2Buffer2Ptr
 200 dri2_create_buffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
 201 {
 202     DRI2Buffer2Ptr buffer;
 203     BufferPrivatePtr private;
 204
 205     buffer = calloc(1, sizeof *buffer);
 206     if (!buffer)
 207         return NULL;
 208
 209     private = calloc(1, sizeof *private);
 210     if (!private) {
 211         goto fail;
 212     }
 213
 214     buffer->attachment = attachment;
 215     buffer->driverPrivate = private;
 216
 217     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 218     if (dri2_do_create_buffer(pDraw, (DRI2BufferPtr)buffer, format))
 219         return buffer;
 220
 221     free(private);
 222 fail:
 223     free(buffer);
 224     return NULL;
 225 }
 226
 227 static void
 228 dri2_destroy_buffer(DrawablePtr pDraw, DRI2Buffer2Ptr buffer)
 229 {
 230     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 231     dri2_do_destroy_buffer(pDraw, (DRI2BufferPtr)buffer);
 232
 233     free(buffer->driverPrivate);
 234     free(buffer);
 235 }
 236
 237 #endif /* DRI2INFOREC_VERSION >= 2 */
 238
 239 #if DRI2INFOREC_VERSION <= 2
 240
 241 static DRI2BufferPtr
 242 dri2_create_buffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 243 {
 244     BufferPrivatePtr privates;
 245     DRI2BufferPtr buffers;
 246     int i;
 247
 248     buffers = calloc(count, sizeof *buffers);
 249     if (!buffers)
 250         goto fail_buffers;
 251
 252     privates = calloc(count, sizeof *privates);
 253     if (!privates)
 254         goto fail_privates;
 255
 256     for (i = 0; i < count; i++) {
 257         buffers[i].attachment = attachments[i];
 258         buffers[i].driverPrivate = &privates[i];
 259
 260         if (!dri2_do_create_buffer(pDraw, &buffers[i], 0))
 261             goto fail;
 262     }
 263
 264     return buffers;
 265
 266 fail:
 267     free(privates);
 268 fail_privates:
 269     free(buffers);
 270 fail_buffers:
 271     return NULL;
 272 }
 273
 274 static void
 275 dri2_destroy_buffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 276 {
 277     int i;
 278
 279     for (i = 0; i < count; i++) {
 280         dri2_do_destroy_buffer(pDraw, &buffers[i]);
 281     }
 282
 283     if (buffers) {
 284         free(buffers[0].driverPrivate);
 285         free(buffers);
 286     }
 287 }
 288
 289 #endif /* DRI2INFOREC_VERSION <= 2 */
 290
 291 static void
 292 dri2_copy_region(DrawablePtr pDraw, RegionPtr pRegion,
 293                  DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 294 {
 295     ScreenPtr pScreen = pDraw->pScreen;
 296     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 297     modesettingPtr ms = modesettingPTR(pScrn);
 298     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 299     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 300     DrawablePtr src_draw;
 301     DrawablePtr dst_draw;
 302     GCPtr gc;
 303     RegionPtr copy_clip;
 304     Bool save_accel;
 305     CustomizerPtr cust = ms->cust;
 306
 307     /*
 308      * In driCreateBuffers we dewrap windows into the
 309      * backing pixmaps in order to get to the texture.
 310      * We need to use the real drawable in CopyArea
 311      * so that cliprects and offsets are correct.
 312      */
 313     src_draw = (pSrcBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 314        &src_priv->pPixmap->drawable;
 315     dst_draw = (pDestBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 316        &dst_priv->pPixmap->drawable;
 317
 318     /*
 319      * The clients implements glXWaitX with a copy front to fake and then
 320      * waiting on the server to signal its completion of it. While
 321      * glXWaitGL is a client side flush and a copy from fake to front.
 322      * This is how it is done in the DRI2 protocol, how ever depending
 323      * which type of drawables the server does things a bit differently
 324      * then what the protocol says as the fake and front are the same.
 325      *
 326      * for pixmaps glXWaitX is a server flush.
 327      * for pixmaps glXWaitGL is a client flush.
 328      * for windows glXWaitX is a copy from front to fake then a server flush.
 329      * for windows glXWaitGL is a client flush then a copy from fake to front.
 330      *
 331      * XXX in the windows case this code always flushes but that isn't a
 332      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 333      * or a glFlush/glFinish call.
 334      */
 335     if (dst_priv->pPixmap == src_priv->pPixmap) {
 336         /* pixmap glXWaitX */
 337         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 338             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 339             ms->ctx->flush(ms->ctx, NULL);
 340             return;
 341         }
 342         /* pixmap glXWaitGL */
 343         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 344             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 345             return;
 346         } else {
 347             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 348                 "copying between the same pixmap\n");
 349         }
 350     }
 351
 352     gc = GetScratchGC(pDraw->depth, pScreen);
 353     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 354     REGION_COPY(pScreen, copy_clip, pRegion);
 355     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 356     ValidateGC(dst_draw, gc);
 357
 358     /* If this is a full buffer swap, throttle on the previous one */
 359     if (ms->swapThrottling &&
 360         dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 361         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 362
 363         if (extents->x1 == 0 && extents->y1 == 0 &&
 364             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 365             ms->screen->fence_finish(ms->screen, dst_priv->fence,
 366                                      PIPE_TIMEOUT_INFINITE);
 367             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 368         }
 369     }
 370
 371     /* Try to make sure the blit will be accelerated */
 372     save_accel = ms->exa->accel;
 373     ms->exa->accel = TRUE;
 374
 375     if (pSrcBuffer->attachment != DRI2BufferFrontLeft) {
 376         /* In case it won't be though, make sure the GPU copy contents of the
 377          * source pixmap will be used for the software fallback - presumably the
 378          * client modified them before calling in here.
 379          */
 380         exaMoveInPixmap(src_priv->pPixmap);
 381         DamageRegionAppend(src_draw, pRegion);
 382         DamageRegionProcessPending(src_draw);
 383     }
 384
 385    if (cust && cust->winsys_context_throttle)
 386        cust->winsys_context_throttle(cust, ms->ctx, THROTTLE_SWAP);
 387
 388     (*gc->ops->CopyArea)(src_draw, dst_draw, gc,
 389                          0, 0, pDraw->width, pDraw->height, 0, 0);
 390     ms->exa->accel = save_accel;
 391
 392     FreeScratchGC(gc);
 393
 394     ms->ctx->flush(ms->ctx,
 395                    (pDestBuffer->attachment == DRI2BufferFrontLeft
 396                     && ms->swapThrottling) ?
 397                    &dst_priv->fence : NULL);
 398
 399    if (cust && cust->winsys_context_throttle)
 400        cust->winsys_context_throttle(cust, ms->ctx, THROTTLE_RENDER);
 401
 402 }
 403
 404 Bool
 405 xorg_dri2_init(ScreenPtr pScreen)
 406 {
 407     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 408     modesettingPtr ms = modesettingPTR(pScrn);
 409     DRI2InfoRec dri2info;
 410 #if DRI2INFOREC_VERSION >= 2
 411     int major, minor;
 412
 413     if (xf86LoaderCheckSymbol("DRI2Version")) {
 414         DRI2Version(&major, &minor);
 415     } else {
 416         /* Assume version 1.0 */
 417         major = 1;
 418         minor = 0;
 419     }
 420 #endif
 421
 422     dri2info.version = min(DRI2INFOREC_VERSION, 3);
 423     dri2info.fd = ms->fd;
 424
 425     dri2info.driverName = pScrn->driverName;
 426     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 427
 428 #if DRI2INFOREC_VERSION >= 2
 429     dri2info.CreateBuffer = dri2_create_buffer;
 430     dri2info.DestroyBuffer = dri2_destroy_buffer;
 431 #endif
 432
 433     /* For X servers in the 1.6.x series there where two DRI2 version.
 434      * This allows us to build one binary that works on both servers.
 435      */
 436 #if DRI2INFOREC_VERSION == 2
 437     if (minor == 0) {
 438         set_format_in_do_create_buffer = FALSE;
 439         dri2info.CreateBuffers = dri2_create_buffers;
 440         dri2info.DestroyBuffers = dri2_destroy_buffers;
 441     } else
 442         set_format_in_do_create_buffer = FALSE;
 443 #endif
 444
 445     /* For version 1 set these unconditionaly. */
 446 #if DRI2INFOREC_VERSION == 1
 447     dri2info.CreateBuffers = dri2_create_buffers;
 448     dri2info.DestroyBuffers = dri2_destroy_buffers;
 449 #endif
 450     dri2info.CopyRegion = dri2_copy_region;
 451     dri2info.Wait = NULL;
 452
 453     ms->d_depth_bits_last =
 454          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_Z24X8_UNORM,
 455                                          PIPE_TEXTURE_2D,
 456                                          0,
 457                                          PIPE_BIND_DEPTH_STENCIL);
 458     ms->ds_depth_bits_last =
 459          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_Z24_UNORM_S8_UINT,
 460                                          PIPE_TEXTURE_2D,
 461                                          0,
 462                                          PIPE_BIND_DEPTH_STENCIL);
 463
 464     return DRI2ScreenInit(pScreen, &dri2info);
 465 }
 466
 467 void
 468 xorg_dri2_close(ScreenPtr pScreen)
 469 {
 470     DRI2CloseScreen(pScreen);
 471 }
 472
 473 /* vim: set sw=4 ts=8 sts=4: */