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 /* XXX can it be set to 1? */
  48 #ifndef DRI2INFOREC_VERSION
  49 #define DRI2INFOREC_VERSION 0
  50 #endif
  51
  52 typedef struct {
  53     PixmapPtr pPixmap;
  54     struct pipe_texture *tex;
  55     struct pipe_fence_handle *fence;
  56 } *BufferPrivatePtr;
  57
  58 static Bool
  59 dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int format)
  60 {
  61     struct pipe_texture *tex = NULL;
  62     ScreenPtr pScreen = pDraw->pScreen;
  63     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  64     modesettingPtr ms = modesettingPTR(pScrn);
  65     struct exa_pixmap_priv *exa_priv;
  66     BufferPrivatePtr private = buffer->driverPrivate;
  67     PixmapPtr pPixmap;
  68     unsigned stride, handle;
  69
  70     if (pDraw->type == DRAWABLE_PIXMAP)
  71         pPixmap = (PixmapPtr) pDraw;
  72     else
  73         pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
  74     exa_priv = exaGetPixmapDriverPrivate(pPixmap);
  75
  76     switch (buffer->attachment) {
  77     default:
  78         if (buffer->attachment != DRI2BufferFakeFrontLeft ||
  79             pDraw->type != DRAWABLE_PIXMAP) {
  80             private->pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
  81                                                         pDraw->height,
  82                                                         pDraw->depth,
  83                                                         0);
  84         }
  85         break;
  86     case DRI2BufferFrontLeft:
  87         break;
  88     case DRI2BufferStencil:
  89 #if DRI2INFOREC_VERSION >= 3
  90     case DRI2BufferDepthStencil:
  91 #else
  92     /* Works on old X servers because sanity checking is for the weak */
  93     case 9:
  94 #endif
  95         if (exa_priv->depth_stencil_tex &&
  96             !util_format_is_depth_or_stencil(exa_priv->depth_stencil_tex->format))
  97             exa_priv->depth_stencil_tex = NULL;
  98         /* Fall through */
  99     case DRI2BufferDepth:
 100         if (exa_priv->depth_stencil_tex)
 101             pipe_texture_reference(&tex, exa_priv->depth_stencil_tex);
 102         else {
 103             struct pipe_texture template;
 104             memset(&template, 0, sizeof(template));
 105             template.target = PIPE_TEXTURE_2D;
 106             if (buffer->attachment == DRI2BufferDepth)
 107                 template.format = ms->ds_depth_bits_last ?
 108                     PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
 109             else
 110                 template.format = ms->ds_depth_bits_last ?
 111                     PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
 112             template.width0 = pDraw->width;
 113             template.height0 = pDraw->height;
 114             template.depth0 = 1;
 115             template.last_level = 0;
 116             template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
 117                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
 118             tex = ms->screen->texture_create(ms->screen, &template);
 119             pipe_texture_reference(&exa_priv->depth_stencil_tex, tex);
 120         }
 121         break;
 122     }
 123
 124     if (!private->pPixmap) {
 125         private->pPixmap = pPixmap;
 126         pPixmap->refcnt++;
 127     }
 128
 129     if (!tex) {
 130         /* First call to make sure we have a pixmap private */
 131         exaMoveInPixmap(private->pPixmap);
 132         xorg_exa_set_shared_usage(private->pPixmap);
 133         pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
 134         /* Second call to make sure texture has valid contents */
 135         exaMoveInPixmap(private->pPixmap);
 136         tex = xorg_exa_get_texture(private->pPixmap);
 137     }
 138
 139     if (!tex)
 140         FatalError("NO TEXTURE IN DRI2\n");
 141
 142     ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
 143
 144     buffer->name = handle;
 145     buffer->pitch = stride;
 146     buffer->cpp = 4;
 147     buffer->driverPrivate = private;
 148     buffer->flags = 0; /* not tiled */
 149 #if DRI2INFOREC_VERSION == 2
 150     ((DRI2Buffer2Ptr)buffer)->format = 0;
 151 #elif DRI2INFOREC_VERSION >= 3
 152     buffer->format = 0;
 153 #endif
 154     private->tex = tex;
 155
 156     return TRUE;
 157 }
 158
 159 static void
 160 dri2_do_destroy_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 161 {
 162     ScreenPtr pScreen = pDraw->pScreen;
 163     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 164     modesettingPtr ms = modesettingPTR(pScrn);
 165     BufferPrivatePtr private = buffer->driverPrivate;
 166     struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
 167
 168     pipe_texture_reference(&private->tex, NULL);
 169     ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 170     pipe_texture_reference(&exa_priv->depth_stencil_tex, NULL);
 171     (*pScreen->DestroyPixmap)(private->pPixmap);
 172 }
 173
 174 #if DRI2INFOREC_VERSION >= 2
 175
 176 static DRI2Buffer2Ptr
 177 dri2_create_buffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
 178 {
 179     DRI2Buffer2Ptr buffer;
 180     BufferPrivatePtr private;
 181
 182     buffer = xcalloc(1, sizeof *buffer);
 183     if (!buffer)
 184         return NULL;
 185
 186     private = xcalloc(1, sizeof *private);
 187     if (!private) {
 188         goto fail;
 189     }
 190
 191     buffer->attachment = attachment;
 192     buffer->driverPrivate = private;
 193
 194     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 195     if (dri2_do_create_buffer(pDraw, (DRI2BufferPtr)buffer, format))
 196         return buffer;
 197
 198     xfree(private);
 199 fail:
 200     xfree(buffer);
 201     return NULL;
 202 }
 203
 204 static void
 205 dri2_destroy_buffer(DrawablePtr pDraw, DRI2Buffer2Ptr buffer)
 206 {
 207     /* So far it is safe to downcast a DRI2Buffer2Ptr to DRI2BufferPtr */
 208     dri2_do_destroy_buffer(pDraw, (DRI2BufferPtr)buffer);
 209
 210     xfree(buffer->driverPrivate);
 211     xfree(buffer);
 212 }
 213
 214 #else /* DRI2INFOREC_VERSION < 2 */
 215
 216 static DRI2BufferPtr
 217 dri2_create_buffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 218 {
 219     BufferPrivatePtr privates;
 220     DRI2BufferPtr buffers;
 221     int i;
 222
 223     buffers = xcalloc(count, sizeof *buffers);
 224     if (!buffers)
 225         goto fail_buffers;
 226
 227     privates = xcalloc(count, sizeof *privates);
 228     if (!privates)
 229         goto fail_privates;
 230
 231     for (i = 0; i < count; i++) {
 232         buffers[i].attachment = attachments[i];
 233         buffers[i].driverPrivate = &privates[i];
 234
 235         if (!dri2_do_create_buffer(pDraw, &buffers[i], 0))
 236             goto fail;
 237     }
 238
 239     return buffers;
 240
 241 fail:
 242     xfree(privates);
 243 fail_privates:
 244     xfree(buffers);
 245 fail_buffers:
 246     return NULL;
 247 }
 248
 249 static void
 250 dri2_destroy_buffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 251 {
 252     int i;
 253
 254     for (i = 0; i < count; i++) {
 255         dri2_do_destroy_buffer(pDraw, &buffers[i]);
 256     }
 257
 258     if (buffers) {
 259         xfree(buffers[0].driverPrivate);
 260         xfree(buffers);
 261     }
 262 }
 263
 264 #endif /* DRI2INFOREC_VERSION >= 2 */
 265
 266 static void
 267 dri2_copy_region(DrawablePtr pDraw, RegionPtr pRegion,
 268                  DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 269 {
 270     ScreenPtr pScreen = pDraw->pScreen;
 271     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 272     modesettingPtr ms = modesettingPTR(pScrn);
 273     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 274     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 275     DrawablePtr src_draw;
 276     DrawablePtr dst_draw;
 277     GCPtr gc;
 278     RegionPtr copy_clip;
 279     Bool save_accel;
 280
 281     /*
 282      * In driCreateBuffers we dewrap windows into the
 283      * backing pixmaps in order to get to the texture.
 284      * We need to use the real drawable in CopyArea
 285      * so that cliprects and offsets are correct.
 286      */
 287     src_draw = (pSrcBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 288        &src_priv->pPixmap->drawable;
 289     dst_draw = (pDestBuffer->attachment == DRI2BufferFrontLeft) ? pDraw :
 290        &dst_priv->pPixmap->drawable;
 291
 292     /*
 293      * The clients implements glXWaitX with a copy front to fake and then
 294      * waiting on the server to signal its completion of it. While
 295      * glXWaitGL is a client side flush and a copy from fake to front.
 296      * This is how it is done in the DRI2 protocol, how ever depending
 297      * which type of drawables the server does things a bit differently
 298      * then what the protocol says as the fake and front are the same.
 299      *
 300      * for pixmaps glXWaitX is a server flush.
 301      * for pixmaps glXWaitGL is a client flush.
 302      * for windows glXWaitX is a copy from front to fake then a server flush.
 303      * for windows glXWaitGL is a client flush then a copy from fake to front.
 304      *
 305      * XXX in the windows case this code always flushes but that isn't a
 306      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 307      * or a glFlush/glFinish call.
 308      */
 309     if (dst_priv->pPixmap == src_priv->pPixmap) {
 310         /* pixmap glXWaitX */
 311         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 312             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 313             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 314             return;
 315         }
 316         /* pixmap glXWaitGL */
 317         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 318             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 319             return;
 320         } else {
 321             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 322                 "copying between the same pixmap\n");
 323         }
 324     }
 325
 326     gc = GetScratchGC(pDraw->depth, pScreen);
 327     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 328     REGION_COPY(pScreen, copy_clip, pRegion);
 329     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 330     ValidateGC(dst_draw, gc);
 331
 332     /* If this is a full buffer swap, throttle on the previous one */
 333     if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 334         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 335
 336         if (extents->x1 == 0 && extents->y1 == 0 &&
 337             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 338             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 339             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 340         }
 341     }
 342
 343     /* Try to make sure the blit will be accelerated */
 344     save_accel = ms->exa->accel;
 345     ms->exa->accel = TRUE;
 346
 347     /* In case it won't be though, make sure the GPU copy contents of the
 348      * source pixmap will be used for the software fallback - presumably the
 349      * client modified them before calling in here.
 350      */
 351     exaMoveInPixmap(src_priv->pPixmap);
 352     DamageRegionAppend(src_draw, pRegion);
 353     DamageRegionProcessPending(src_draw);
 354
 355     (*gc->ops->CopyArea)(src_draw, dst_draw, gc,
 356                          0, 0, pDraw->width, pDraw->height, 0, 0);
 357     ms->exa->accel = save_accel;
 358
 359     FreeScratchGC(gc);
 360
 361     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 362                    pDestBuffer->attachment == DRI2BufferFrontLeft ?
 363                    &dst_priv->fence : NULL);
 364 }
 365
 366 Bool
 367 xorg_dri2_init(ScreenPtr pScreen)
 368 {
 369     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 370     modesettingPtr ms = modesettingPTR(pScrn);
 371     DRI2InfoRec dri2info;
 372
 373 #if DRI2INFOREC_VERSION >= 2
 374     dri2info.version = DRI2INFOREC_VERSION;
 375 #else
 376     dri2info.version = 1;
 377 #endif
 378     dri2info.fd = ms->fd;
 379
 380     dri2info.driverName = pScrn->driverName;
 381     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 382
 383 #if DRI2INFOREC_VERSION >= 2
 384     dri2info.CreateBuffer = dri2_create_buffer;
 385     dri2info.DestroyBuffer = dri2_destroy_buffer;
 386 #else
 387     dri2info.CreateBuffers = dri2_create_buffers;
 388     dri2info.DestroyBuffers = dri2_destroy_buffers;
 389 #endif
 390     dri2info.CopyRegion = dri2_copy_region;
 391     dri2info.Wait = NULL;
 392
 393     ms->d_depth_bits_last =
 394          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
 395                                          PIPE_TEXTURE_2D,
 396                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 397     ms->ds_depth_bits_last =
 398          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
 399                                          PIPE_TEXTURE_2D,
 400                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 401
 402     return DRI2ScreenInit(pScreen, &dri2info);
 403 }
 404
 405 void
 406 xorg_dri2_close(ScreenPtr pScreen)
 407 {
 408     DRI2CloseScreen(pScreen);
 409 }
 410
 411 /* vim: set sw=4 ts=8 sts=4: */