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_texture *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_texture *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     unsigned stride, handle;
  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     switch (buffer->attachment) {
  79     default:
  80         if (buffer->attachment != DRI2BufferFakeFrontLeft ||
  81             pDraw->type != DRAWABLE_PIXMAP) {
  82             private->pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
  83                                                         pDraw->height,
  84                                                         pDraw->depth,
  85                                                         0);
  86         }
  87         break;
  88     case DRI2BufferFrontLeft:
  89         break;
  90     case DRI2BufferStencil:
  91 #if DRI2INFOREC_VERSION >= 3
  92     case DRI2BufferDepthStencil:
  93 #else
  94     /* Works on old X servers because sanity checking is for the weak */
  95     case 9:
  96 #endif
  97         if (exa_priv->depth_stencil_tex &&
  98             !util_format_is_depth_or_stencil(exa_priv->depth_stencil_tex->format))
  99             exa_priv->depth_stencil_tex = NULL;
 100         /* Fall through */
 101     case DRI2BufferDepth:
 102         if (exa_priv->depth_stencil_tex)
 103             pipe_texture_reference(&tex, exa_priv->depth_stencil_tex);
 104         else {
 105             struct pipe_texture template;
 106             memset(&template, 0, sizeof(template));
 107             template.target = PIPE_TEXTURE_2D;
 108             if (buffer->attachment == DRI2BufferDepth)
 109                 template.format = ms->ds_depth_bits_last ?
 110                     PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
 111             else
 112                 template.format = ms->ds_depth_bits_last ?
 113                     PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
 114             template.width0 = pDraw->width;
 115             template.height0 = pDraw->height;
 116             template.depth0 = 1;
 117             template.last_level = 0;
 118             template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
 119                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
 120             tex = ms->screen->texture_create(ms->screen, &template);
 121             pipe_texture_reference(&exa_priv->depth_stencil_tex, tex);
 122         }
 123         break;
 124     }
 125
 126     if (!private->pPixmap) {
 127         private->pPixmap = pPixmap;
 128         pPixmap->refcnt++;
 129     }
 130
 131     if (!tex) {
 132         /* First call to make sure we have a pixmap private */
 133         exaMoveInPixmap(private->pPixmap);
 134         xorg_exa_set_shared_usage(private->pPixmap);
 135         pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
 136         /* Second call to make sure texture has valid contents */
 137         exaMoveInPixmap(private->pPixmap);
 138         tex = xorg_exa_get_texture(private->pPixmap);
 139     }
 140
 141     if (!tex)
 142         FatalError("NO TEXTURE IN DRI2\n");
 143
 144     ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
 145
 146     buffer->name = handle;
 147     buffer->pitch = stride;
 148     buffer->cpp = 4;
 149     buffer->driverPrivate = private;
 150     buffer->flags = 0; /* not tiled */
 151 #if DRI2INFOREC_VERSION == 2
 152     /* ABI forwards/backwards compatibility */
 153     if (set_format_in_do_create_buffer)
 154         ((DRI2Buffer2Ptr)buffer)->format = 0;
 155 #elif DRI2INFOREC_VERSION >= 3
 156     buffer->format = 0;
 157 #endif
 158     private->tex = tex;
 159
 160     return TRUE;
 161 }
 162
 163 static void
 164 dri2_do_destroy_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 165 {
 166     ScreenPtr pScreen = pDraw->pScreen;
 167     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 168     modesettingPtr ms = modesettingPTR(pScrn);
 169     BufferPrivatePtr private = buffer->driverPrivate;
 170     struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
 171
 172     pipe_texture_reference(&private->tex, NULL);
 173     ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 174     pipe_texture_reference(&exa_priv->depth_stencil_tex, NULL);
 175     (*pScreen->DestroyPixmap)(private->pPixmap);
 176 }
 177
 178 #if DRI2INFOREC_VERSION >= 2
 179
 180 static DRI2Buffer2Ptr
 181 dri2_create_buffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
 182 {
 183     DRI2Buffer2Ptr buffer;
 184     BufferPrivatePtr private;
 185
 186     buffer = xcalloc(1, sizeof *buffer);
 187     if (!buffer)
 188         return NULL;
 189
 190     private = xcalloc(1, sizeof *private);
 191     if (!private) {
 192         goto fail;
 193     }
 194
 195     buffer->attachment = attachment;
 196     buffer->driverPrivate = private;
 197
 198     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 199     if (dri2_do_create_buffer(pDraw, (DRI2BufferPtr)buffer, format))
 200         return buffer;
 201
 202     xfree(private);
 203 fail:
 204     xfree(buffer);
 205     return NULL;
 206 }
 207
 208 static void
 209 dri2_destroy_buffer(DrawablePtr pDraw, DRI2Buffer2Ptr buffer)
 210 {
 211     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 212     dri2_do_destroy_buffer(pDraw, (DRI2BufferPtr)buffer);
 213
 214     xfree(buffer->driverPrivate);
 215     xfree(buffer);
 216 }
 217
 218 #endif /* DRI2INFOREC_VERSION >= 2 */
 219
 220 #if DRI2INFOREC_VERSION <= 2
 221
 222 static DRI2BufferPtr
 223 dri2_create_buffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 224 {
 225     BufferPrivatePtr privates;
 226     DRI2BufferPtr buffers;
 227     int i;
 228
 229     buffers = xcalloc(count, sizeof *buffers);
 230     if (!buffers)
 231         goto fail_buffers;
 232
 233     privates = xcalloc(count, sizeof *privates);
 234     if (!privates)
 235         goto fail_privates;
 236
 237     for (i = 0; i < count; i++) {
 238         buffers[i].attachment = attachments[i];
 239         buffers[i].driverPrivate = &privates[i];
 240
 241         if (!dri2_do_create_buffer(pDraw, &buffers[i], 0))
 242             goto fail;
 243     }
 244
 245     return buffers;
 246
 247 fail:
 248     xfree(privates);
 249 fail_privates:
 250     xfree(buffers);
 251 fail_buffers:
 252     return NULL;
 253 }
 254
 255 static void
 256 dri2_destroy_buffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 257 {
 258     int i;
 259
 260     for (i = 0; i < count; i++) {
 261         dri2_do_destroy_buffer(pDraw, &buffers[i]);
 262     }
 263
 264     if (buffers) {
 265         xfree(buffers[0].driverPrivate);
 266         xfree(buffers);
 267     }
 268 }
 269
 270 #endif /* DRI2INFOREC_VERSION <= 2 */
 271
 272 static void
 273 dri2_copy_region(DrawablePtr pDraw, RegionPtr pRegion,
 274                  DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 275 {
 276     ScreenPtr pScreen = pDraw->pScreen;
 277     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 278     modesettingPtr ms = modesettingPTR(pScrn);
 279     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 280     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 281     DrawablePtr src_draw;
 282     DrawablePtr dst_draw;
 283     GCPtr gc;
 284     RegionPtr copy_clip;
 285     Bool save_accel;
 286
 287     /*
 288      * In driCreateBuffers we dewrap windows into the
 289      * backing pixmaps in order to get to the texture.
 290      * We need to use the real drawable in CopyArea
 291      * so that cliprects and offsets are correct.
 292      */
 293     src_draw = (pSrcBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 294        &src_priv->pPixmap->drawable;
 295     dst_draw = (pDestBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 296        &dst_priv->pPixmap->drawable;
 297
 298     /*
 299      * The clients implements glXWaitX with a copy front to fake and then
 300      * waiting on the server to signal its completion of it. While
 301      * glXWaitGL is a client side flush and a copy from fake to front.
 302      * This is how it is done in the DRI2 protocol, how ever depending
 303      * which type of drawables the server does things a bit differently
 304      * then what the protocol says as the fake and front are the same.
 305      *
 306      * for pixmaps glXWaitX is a server flush.
 307      * for pixmaps glXWaitGL is a client flush.
 308      * for windows glXWaitX is a copy from front to fake then a server flush.
 309      * for windows glXWaitGL is a client flush then a copy from fake to front.
 310      *
 311      * XXX in the windows case this code always flushes but that isn't a
 312      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 313      * or a glFlush/glFinish call.
 314      */
 315     if (dst_priv->pPixmap == src_priv->pPixmap) {
 316         /* pixmap glXWaitX */
 317         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 318             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 319             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 320             return;
 321         }
 322         /* pixmap glXWaitGL */
 323         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 324             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 325             return;
 326         } else {
 327             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 328                 "copying between the same pixmap\n");
 329         }
 330     }
 331
 332     gc = GetScratchGC(pDraw->depth, pScreen);
 333     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 334     REGION_COPY(pScreen, copy_clip, pRegion);
 335     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 336     ValidateGC(dst_draw, gc);
 337
 338     /* If this is a full buffer swap, throttle on the previous one */
 339     if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 340         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 341
 342         if (extents->x1 == 0 && extents->y1 == 0 &&
 343             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 344             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 345             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 346         }
 347     }
 348
 349     /* Try to make sure the blit will be accelerated */
 350     save_accel = ms->exa->accel;
 351     ms->exa->accel = TRUE;
 352
 353     /* In case it won't be though, make sure the GPU copy contents of the
 354      * source pixmap will be used for the software fallback - presumably the
 355      * client modified them before calling in here.
 356      */
 357     exaMoveInPixmap(src_priv->pPixmap);
 358     DamageRegionAppend(src_draw, pRegion);
 359     DamageRegionProcessPending(src_draw);
 360
 361     (*gc->ops->CopyArea)(src_draw, dst_draw, gc,
 362                          0, 0, pDraw->width, pDraw->height, 0, 0);
 363     ms->exa->accel = save_accel;
 364
 365     FreeScratchGC(gc);
 366
 367     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 368                    pDestBuffer->attachment == DRI2BufferFrontLeft ?
 369                    &dst_priv->fence : NULL);
 370 }
 371
 372 Bool
 373 xorg_dri2_init(ScreenPtr pScreen)
 374 {
 375     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 376     modesettingPtr ms = modesettingPTR(pScrn);
 377     DRI2InfoRec dri2info;
 378 #if DRI2INFOREC_VERSION >= 2
 379     int major, minor;
 380
 381     if (xf86LoaderCheckSymbol("DRI2Version")) {
 382         DRI2Version(&major, &minor);
 383     } else {
 384         /* Assume version 1.0 */
 385         major = 1;
 386         minor = 0;
 387     }
 388 #endif
 389
 390     dri2info.version = DRI2INFOREC_VERSION;
 391     dri2info.fd = ms->fd;
 392
 393     dri2info.driverName = pScrn->driverName;
 394     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 395
 396 #if DRI2INFOREC_VERSION >= 2
 397     dri2info.CreateBuffer = dri2_create_buffer;
 398     dri2info.DestroyBuffer = dri2_destroy_buffer;
 399 #endif
 400
 401     /* For X servers in the 1.6.x series there where two DRI2 version.
 402      * This allows us to build one binary that works on both servers.
 403      */
 404 #if DRI2INFOREC_VERSION == 2
 405     if (minor == 0) {
 406         set_format_in_do_create_buffer = FALSE;
 407         dri2info.CreateBuffers = dri2_create_buffers;
 408         dri2info.DestroyBuffers = dri2_destroy_buffers;
 409     } else
 410         set_format_in_do_create_buffer = FALSE;
 411 #endif
 412
 413     /* For version 1 set these unconditionaly. */
 414 #if DRI2INFOREC_VERSION == 1
 415     dri2info.CreateBuffers = dri2_create_buffers;
 416     dri2info.DestroyBuffers = dri2_destroy_buffers;
 417 #endif
 418     dri2info.CopyRegion = dri2_copy_region;
 419     dri2info.Wait = NULL;
 420
 421     ms->d_depth_bits_last =
 422          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
 423                                          PIPE_TEXTURE_2D,
 424                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 425     ms->ds_depth_bits_last =
 426          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
 427                                          PIPE_TEXTURE_2D,
 428                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 429
 430     return DRI2ScreenInit(pScreen, &dri2info);
 431 }
 432
 433 void
 434 xorg_dri2_close(ScreenPtr pScreen)
 435 {
 436     DRI2CloseScreen(pScreen);
 437 }
 438
 439 /* vim: set sw=4 ts=8 sts=4: */