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 "pipe/p_inlines.h"
  42
  43 #include "util/u_format.h"
  44 #include "util/u_rect.h"
  45
  46 /* Make all the #if cases in the code esier to read */
  47 #ifndef DRI2INFOREC_VERSION
  48 #define DRI2INFOREC_VERSION 1
  49 #endif
  50
  51 #if DRI2INFOREC_VERSION == 2
  52 static Bool set_format_in_do_create_buffer;
  53 #endif
  54
  55 typedef struct {
  56     PixmapPtr pPixmap;
  57     struct pipe_texture *tex;
  58     struct pipe_fence_handle *fence;
  59 } *BufferPrivatePtr;
  60
  61 static Bool
  62 dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int format)
  63 {
  64     struct pipe_texture *tex = NULL;
  65     ScreenPtr pScreen = pDraw->pScreen;
  66     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  67     modesettingPtr ms = modesettingPTR(pScrn);
  68     struct exa_pixmap_priv *exa_priv;
  69     BufferPrivatePtr private = buffer->driverPrivate;
  70     PixmapPtr pPixmap;
  71     unsigned stride, handle;
  72
  73     if (pDraw->type == DRAWABLE_PIXMAP)
  74         pPixmap = (PixmapPtr) pDraw;
  75     else
  76         pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
  77     exa_priv = exaGetPixmapDriverPrivate(pPixmap);
  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_texture_reference(&tex, exa_priv->depth_stencil_tex);
 105         else {
 106             struct pipe_texture template;
 107             memset(&template, 0, sizeof(template));
 108             template.target = PIPE_TEXTURE_2D;
 109             if (buffer->attachment == DRI2BufferDepth)
 110                 template.format = ms->ds_depth_bits_last ?
 111                     PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
 112             else
 113                 template.format = ms->ds_depth_bits_last ?
 114                     PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
 115             template.width0 = pDraw->width;
 116             template.height0 = pDraw->height;
 117             template.depth0 = 1;
 118             template.last_level = 0;
 119             template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
 120                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
 121             tex = ms->screen->texture_create(ms->screen, &template);
 122             pipe_texture_reference(&exa_priv->depth_stencil_tex, tex);
 123         }
 124         break;
 125     }
 126
 127     if (!private->pPixmap) {
 128         private->pPixmap = pPixmap;
 129         pPixmap->refcnt++;
 130     }
 131
 132     if (!tex) {
 133         /* First call to make sure we have a pixmap private */
 134         exaMoveInPixmap(private->pPixmap);
 135         xorg_exa_set_shared_usage(private->pPixmap);
 136         pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
 137         /* Second call to make sure texture has valid contents */
 138         exaMoveInPixmap(private->pPixmap);
 139         tex = xorg_exa_get_texture(private->pPixmap);
 140     }
 141
 142     if (!tex)
 143         FatalError("NO TEXTURE IN DRI2\n");
 144
 145     ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
 146
 147     buffer->name = handle;
 148     buffer->pitch = stride;
 149     buffer->cpp = 4;
 150     buffer->driverPrivate = private;
 151     buffer->flags = 0; /* not tiled */
 152 #if DRI2INFOREC_VERSION == 2
 153     /* ABI forwards/backwards compatibility */
 154     if (set_format_in_do_create_buffer)
 155         ((DRI2Buffer2Ptr)buffer)->format = 0;
 156 #elif DRI2INFOREC_VERSION >= 3
 157     buffer->format = 0;
 158 #endif
 159     private->tex = tex;
 160
 161     return TRUE;
 162 }
 163
 164 static void
 165 dri2_do_destroy_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 166 {
 167     ScreenPtr pScreen = pDraw->pScreen;
 168     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 169     modesettingPtr ms = modesettingPTR(pScrn);
 170     BufferPrivatePtr private = buffer->driverPrivate;
 171     struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
 172
 173     pipe_texture_reference(&private->tex, NULL);
 174     ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 175     pipe_texture_reference(&exa_priv->depth_stencil_tex, NULL);
 176     (*pScreen->DestroyPixmap)(private->pPixmap);
 177 }
 178
 179 #if DRI2INFOREC_VERSION >= 2
 180
 181 static DRI2Buffer2Ptr
 182 dri2_create_buffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
 183 {
 184     DRI2Buffer2Ptr buffer;
 185     BufferPrivatePtr private;
 186
 187     buffer = xcalloc(1, sizeof *buffer);
 188     if (!buffer)
 189         return NULL;
 190
 191     private = xcalloc(1, sizeof *private);
 192     if (!private) {
 193         goto fail;
 194     }
 195
 196     buffer->attachment = attachment;
 197     buffer->driverPrivate = private;
 198
 199     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 200     if (dri2_do_create_buffer(pDraw, (DRI2BufferPtr)buffer, format))
 201         return buffer;
 202
 203     xfree(private);
 204 fail:
 205     xfree(buffer);
 206     return NULL;
 207 }
 208
 209 static void
 210 dri2_destroy_buffer(DrawablePtr pDraw, DRI2Buffer2Ptr buffer)
 211 {
 212     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 213     dri2_do_destroy_buffer(pDraw, (DRI2BufferPtr)buffer);
 214
 215     xfree(buffer->driverPrivate);
 216     xfree(buffer);
 217 }
 218
 219 #endif /* DRI2INFOREC_VERSION >= 2 */
 220
 221 #if DRI2INFOREC_VERSION <= 2
 222
 223 static DRI2BufferPtr
 224 dri2_create_buffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 225 {
 226     BufferPrivatePtr privates;
 227     DRI2BufferPtr buffers;
 228     int i;
 229
 230     buffers = xcalloc(count, sizeof *buffers);
 231     if (!buffers)
 232         goto fail_buffers;
 233
 234     privates = xcalloc(count, sizeof *privates);
 235     if (!privates)
 236         goto fail_privates;
 237
 238     for (i = 0; i < count; i++) {
 239         buffers[i].attachment = attachments[i];
 240         buffers[i].driverPrivate = &privates[i];
 241
 242         if (!dri2_do_create_buffer(pDraw, &buffers[i], 0))
 243             goto fail;
 244     }
 245
 246     return buffers;
 247
 248 fail:
 249     xfree(privates);
 250 fail_privates:
 251     xfree(buffers);
 252 fail_buffers:
 253     return NULL;
 254 }
 255
 256 static void
 257 dri2_destroy_buffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 258 {
 259     int i;
 260
 261     for (i = 0; i < count; i++) {
 262         dri2_do_destroy_buffer(pDraw, &buffers[i]);
 263     }
 264
 265     if (buffers) {
 266         xfree(buffers[0].driverPrivate);
 267         xfree(buffers);
 268     }
 269 }
 270
 271 #endif /* DRI2INFOREC_VERSION <= 2 */
 272
 273 static void
 274 dri2_copy_region(DrawablePtr pDraw, RegionPtr pRegion,
 275                  DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 276 {
 277     ScreenPtr pScreen = pDraw->pScreen;
 278     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 279     modesettingPtr ms = modesettingPTR(pScrn);
 280     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 281     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 282     DrawablePtr src_draw;
 283     DrawablePtr dst_draw;
 284     GCPtr gc;
 285     RegionPtr copy_clip;
 286     Bool save_accel;
 287
 288     /*
 289      * In driCreateBuffers we dewrap windows into the
 290      * backing pixmaps in order to get to the texture.
 291      * We need to use the real drawable in CopyArea
 292      * so that cliprects and offsets are correct.
 293      */
 294     src_draw = (pSrcBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 295        &src_priv->pPixmap->drawable;
 296     dst_draw = (pDestBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 297        &dst_priv->pPixmap->drawable;
 298
 299     /*
 300      * The clients implements glXWaitX with a copy front to fake and then
 301      * waiting on the server to signal its completion of it. While
 302      * glXWaitGL is a client side flush and a copy from fake to front.
 303      * This is how it is done in the DRI2 protocol, how ever depending
 304      * which type of drawables the server does things a bit differently
 305      * then what the protocol says as the fake and front are the same.
 306      *
 307      * for pixmaps glXWaitX is a server flush.
 308      * for pixmaps glXWaitGL is a client flush.
 309      * for windows glXWaitX is a copy from front to fake then a server flush.
 310      * for windows glXWaitGL is a client flush then a copy from fake to front.
 311      *
 312      * XXX in the windows case this code always flushes but that isn't a
 313      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 314      * or a glFlush/glFinish call.
 315      */
 316     if (dst_priv->pPixmap == src_priv->pPixmap) {
 317         /* pixmap glXWaitX */
 318         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 319             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 320             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 321             return;
 322         }
 323         /* pixmap glXWaitGL */
 324         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 325             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 326             return;
 327         } else {
 328             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 329                 "copying between the same pixmap\n");
 330         }
 331     }
 332
 333     gc = GetScratchGC(pDraw->depth, pScreen);
 334     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 335     REGION_COPY(pScreen, copy_clip, pRegion);
 336     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 337     ValidateGC(dst_draw, gc);
 338
 339     /* If this is a full buffer swap, throttle on the previous one */
 340     if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 341         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 342
 343         if (extents->x1 == 0 && extents->y1 == 0 &&
 344             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 345             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 346             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 347         }
 348     }
 349
 350     /* Try to make sure the blit will be accelerated */
 351     save_accel = ms->exa->accel;
 352     ms->exa->accel = TRUE;
 353
 354     /* In case it won't be though, make sure the GPU copy contents of the
 355      * source pixmap will be used for the software fallback - presumably the
 356      * client modified them before calling in here.
 357      */
 358     exaMoveInPixmap(src_priv->pPixmap);
 359     DamageRegionAppend(src_draw, pRegion);
 360     DamageRegionProcessPending(src_draw);
 361
 362     (*gc->ops->CopyArea)(src_draw, dst_draw, gc,
 363                          0, 0, pDraw->width, pDraw->height, 0, 0);
 364     ms->exa->accel = save_accel;
 365
 366     FreeScratchGC(gc);
 367
 368     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 369                    pDestBuffer->attachment == DRI2BufferFrontLeft ?
 370                    &dst_priv->fence : NULL);
 371 }
 372
 373 Bool
 374 xorg_dri2_init(ScreenPtr pScreen)
 375 {
 376     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 377     modesettingPtr ms = modesettingPTR(pScrn);
 378     DRI2InfoRec dri2info;
 379 #if DRI2INFOREC_VERSION >= 2
 380     int major, minor;
 381
 382     if (xf86LoaderCheckSymbol("DRI2Version")) {
 383         DRI2Version(&major, &minor);
 384     } else {
 385         /* Assume version 1.0 */
 386         major = 1;
 387         minor = 0;
 388     }
 389 #endif
 390
 391     dri2info.version = DRI2INFOREC_VERSION;
 392     dri2info.fd = ms->fd;
 393
 394     dri2info.driverName = pScrn->driverName;
 395     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 396
 397 #if DRI2INFOREC_VERSION >= 2
 398     dri2info.CreateBuffer = dri2_create_buffer;
 399     dri2info.DestroyBuffer = dri2_destroy_buffer;
 400 #endif
 401
 402     /* For X servers in the 1.6.x series there where two DRI2 version.
 403      * This allows us to build one binary that works on both servers.
 404      */
 405 #if DRI2INFOREC_VERSION == 2
 406     if (minor == 0) {
 407         set_format_in_do_create_buffer = FALSE;
 408         dri2info.CreateBuffers = dri2_create_buffers;
 409         dri2info.DestroyBuffers = dri2_destroy_buffers;
 410     } else
 411         set_format_in_do_create_buffer = FALSE;
 412 #endif
 413
 414     /* For version 1 set these unconditionaly. */
 415 #if DRI2INFOREC_VERSION == 1
 416     dri2info.CreateBuffers = dri2_create_buffers;
 417     dri2info.DestroyBuffers = dri2_destroy_buffers;
 418 #endif
 419     dri2info.CopyRegion = dri2_copy_region;
 420     dri2info.Wait = NULL;
 421
 422     ms->d_depth_bits_last =
 423          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
 424                                          PIPE_TEXTURE_2D,
 425                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 426     ms->ds_depth_bits_last =
 427          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
 428                                          PIPE_TEXTURE_2D,
 429                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 430
 431     return DRI2ScreenInit(pScreen, &dri2info);
 432 }
 433
 434 void
 435 xorg_dri2_close(ScreenPtr pScreen)
 436 {
 437     DRI2CloseScreen(pScreen);
 438 }
 439
 440 /* vim: set sw=4 ts=8 sts=4: */