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