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_rect.h"
  44
  45 typedef struct {
  46     PixmapPtr pPixmap;
  47     struct pipe_texture *tex;
  48     struct pipe_fence_handle *fence;
  49 } *BufferPrivatePtr;
  50
  51 static Bool
  52 driDoCreateBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int format)
  53 {
  54     struct pipe_texture *tex = NULL;
  55     ScreenPtr pScreen = pDraw->pScreen;
  56     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  57     modesettingPtr ms = modesettingPTR(pScrn);
  58     struct exa_pixmap_priv *exa_priv;
  59     BufferPrivatePtr private = buffer->driverPrivate;
  60     PixmapPtr pPixmap;
  61     unsigned stride, handle;
  62
  63     if (pDraw->type == DRAWABLE_PIXMAP)
  64         pPixmap = (PixmapPtr) pDraw;
  65     else
  66         pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
  67     exa_priv = exaGetPixmapDriverPrivate(pPixmap);
  68
  69     switch (buffer->attachment) {
  70     default:
  71         if (buffer->attachment != DRI2BufferFakeFrontLeft ||
  72             pDraw->type != DRAWABLE_PIXMAP) {
  73             private->pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
  74                                                         pDraw->height,
  75                                                         pDraw->depth,
  76                                                         0);
  77         }
  78         break;
  79     case DRI2BufferFrontLeft:
  80         break;
  81     case DRI2BufferStencil:
  82 #if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
  83     case DRI2BufferDepthStencil:
  84 #else
  85     /* Works on old X servers because sanity checking is for the weak */
  86     case 9:
  87 #endif
  88         if (exa_priv->depth_stencil_tex &&
  89             !pf_is_depth_stencil(exa_priv->depth_stencil_tex->format))
  90             exa_priv->depth_stencil_tex = NULL;
  91         /* Fall through */
  92     case DRI2BufferDepth:
  93         if (exa_priv->depth_stencil_tex)
  94             pipe_texture_reference(&tex, exa_priv->depth_stencil_tex);
  95         else {
  96             struct pipe_texture template;
  97             memset(&template, 0, sizeof(template));
  98             template.target = PIPE_TEXTURE_2D;
  99             if (buffer->attachment == DRI2BufferDepth)
 100                 template.format = ms->ds_depth_bits_last ?
 101                     PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
 102             else
 103                 template.format = ms->ds_depth_bits_last ?
 104                     PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
 105             pf_get_block(template.format, &template.block);
 106             template.width[0] = pDraw->width;
 107             template.height[0] = pDraw->height;
 108             template.depth[0] = 1;
 109             template.last_level = 0;
 110             template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
 111                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET;
 112             tex = ms->screen->texture_create(ms->screen, &template);
 113             pipe_texture_reference(&exa_priv->depth_stencil_tex, tex);
 114         }
 115         break;
 116     }
 117
 118     if (!private->pPixmap) {
 119         private->pPixmap = pPixmap;
 120         pPixmap->refcnt++;
 121     }
 122
 123     if (!tex) {
 124         exaMoveInPixmap(private->pPixmap);
 125         xorg_exa_set_shared_usage(private->pPixmap);
 126         pScreen->ModifyPixmapHeader(private->pPixmap, 0, 0, 0, 0, 0, NULL);
 127         tex = xorg_exa_get_texture(private->pPixmap);
 128     }
 129
 130     if (!tex)
 131         FatalError("NO TEXTURE IN DRI2\n");
 132
 133     ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
 134
 135     buffer->name = handle;
 136     buffer->pitch = stride;
 137     buffer->cpp = 4;
 138     buffer->driverPrivate = private;
 139     buffer->flags = 0; /* not tiled */
 140     private->tex = tex;
 141
 142     return TRUE;
 143 }
 144
 145 static void
 146 driDoDestroyBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 147 {
 148     ScreenPtr pScreen = pDraw->pScreen;
 149     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 150     modesettingPtr ms = modesettingPTR(pScrn);
 151     BufferPrivatePtr private = buffer->driverPrivate;
 152     struct exa_pixmap_priv *exa_priv = exaGetPixmapDriverPrivate(private->pPixmap);
 153
 154     pipe_texture_reference(&private->tex, NULL);
 155     ms->screen->fence_reference(ms->screen, &private->fence, NULL);
 156     pipe_texture_reference(&exa_priv->depth_stencil_tex, NULL);
 157     (*pScreen->DestroyPixmap)(private->pPixmap);
 158 }
 159
 160 #if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
 161
 162 static DRI2BufferPtr
 163 driCreateBuffer(DrawablePtr pDraw, unsigned int attachment, unsigned int format)
 164 {
 165     DRI2BufferPtr buffer;
 166     BufferPrivatePtr private;
 167
 168     buffer = xcalloc(1, sizeof *buffer);
 169     if (!buffer)
 170         return NULL;
 171
 172     private = xcalloc(1, sizeof *private);
 173     if (!private) {
 174         goto fail;
 175     }
 176
 177     buffer->attachment = attachment;
 178     buffer->driverPrivate = private;
 179
 180     if (driDoCreateBuffer(pDraw, buffer, format))
 181         return buffer;
 182
 183     xfree(private);
 184 fail:
 185     xfree(buffer);
 186     return NULL;
 187 }
 188
 189 static void
 190 driDestroyBuffer(DrawablePtr pDraw, DRI2BufferPtr buffer)
 191 {
 192     driDoDestroyBuffer(pDraw, buffer);
 193
 194     xfree(buffer->driverPrivate);
 195     xfree(buffer);
 196 }
 197
 198 #else /* DRI2INFOREC_VERSION <= 2 */
 199
 200 static DRI2BufferPtr
 201 driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 202 {
 203     BufferPrivatePtr privates;
 204     DRI2BufferPtr buffers;
 205     int i;
 206
 207     buffers = xcalloc(count, sizeof *buffers);
 208     if (!buffers)
 209         goto fail_buffers;
 210
 211     privates = xcalloc(count, sizeof *privates);
 212     if (!privates)
 213         goto fail_privates;
 214
 215     for (i = 0; i < count; i++) {
 216         buffers[i].attachment = attachments[i];
 217         buffers[i].driverPrivate = &privates[i];
 218
 219         if (!driDoCreateBuffer(pDraw, &buffers[i], 0))
 220             goto fail;
 221     }
 222
 223     return buffers;
 224
 225 fail:
 226     xfree(privates);
 227 fail_privates:
 228     xfree(buffers);
 229 fail_buffers:
 230     return NULL;
 231 }
 232
 233 static void
 234 driDestroyBuffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
 235 {
 236     int i;
 237
 238     for (i = 0; i < count; i++) {
 239         driDoDestroyBuffer(pDraw, &buffers[i]);
 240     }
 241
 242     if (buffers) {
 243         xfree(buffers[0].driverPrivate);
 244         xfree(buffers);
 245     }
 246 }
 247
 248 #endif /* DRI2INFOREC_VERSION */
 249
 250 static void
 251 driCopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
 252               DRI2BufferPtr pDestBuffer, DRI2BufferPtr pSrcBuffer)
 253 {
 254     ScreenPtr pScreen = pDraw->pScreen;
 255     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 256     modesettingPtr ms = modesettingPTR(pScrn);
 257     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
 258     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
 259     PixmapPtr src_pixmap;
 260     PixmapPtr dst_pixmap;
 261     GCPtr gc;
 262     RegionPtr copy_clip;
 263
 264     /*
 265      * In driCreateBuffers we dewrap windows into the
 266      * backing pixmaps in order to get to the texture.
 267      * We need to use the real drawable in CopyArea
 268      * so that cliprects and offsets are correct.
 269      */
 270     src_pixmap = src_priv->pPixmap;
 271     dst_pixmap = dst_priv->pPixmap;
 272     if (pSrcBuffer->attachment == DRI2BufferFrontLeft)
 273         src_pixmap = (PixmapPtr)pDraw;
 274     if (pDestBuffer->attachment == DRI2BufferFrontLeft)
 275         dst_pixmap = (PixmapPtr)pDraw;
 276
 277     /*
 278      * The clients implements glXWaitX with a copy front to fake and then
 279      * waiting on the server to signal its completion of it. While
 280      * glXWaitGL is a client side flush and a copy from fake to front.
 281      * This is how it is done in the DRI2 protocol, how ever depending
 282      * which type of drawables the server does things a bit differently
 283      * then what the protocol says as the fake and front are the same.
 284      *
 285      * for pixmaps glXWaitX is a server flush.
 286      * for pixmaps glXWaitGL is a client flush.
 287      * for windows glXWaitX is a copy from front to fake then a server flush.
 288      * for windows glXWaitGL is a client flush then a copy from fake to front.
 289      *
 290      * XXX in the windows case this code always flushes but that isn't a
 291      * must in the glXWaitGL case but we don't know if this is a glXWaitGL
 292      * or a glFlush/glFinish call.
 293      */
 294     if (dst_pixmap == src_pixmap) {
 295         /* pixmap glXWaitX */
 296         if (pSrcBuffer->attachment == DRI2BufferFrontLeft &&
 297             pDestBuffer->attachment == DRI2BufferFakeFrontLeft) {
 298             ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS, NULL);
 299             return;
 300         }
 301         /* pixmap glXWaitGL */
 302         if (pDestBuffer->attachment == DRI2BufferFrontLeft &&
 303             pSrcBuffer->attachment == DRI2BufferFakeFrontLeft) {
 304             return;
 305         } else {
 306             xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
 307                 "copying between the same pixmap\n");
 308         }
 309     }
 310
 311     gc = GetScratchGC(pDraw->depth, pScreen);
 312     copy_clip = REGION_CREATE(pScreen, NULL, 0);
 313     REGION_COPY(pScreen, copy_clip, pRegion);
 314     (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
 315     ValidateGC(&dst_pixmap->drawable, gc);
 316
 317     /* If this is a full buffer swap, throttle on the previous one */
 318     if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
 319         BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
 320
 321         if (extents->x1 == 0 && extents->y1 == 0 &&
 322             extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
 323             ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
 324             ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
 325         }
 326     }
 327
 328     (*gc->ops->CopyArea)(&src_pixmap->drawable, &dst_pixmap->drawable, gc,
 329                          0, 0, pDraw->width, pDraw->height, 0, 0);
 330
 331     FreeScratchGC(gc);
 332
 333     ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
 334                    pDestBuffer->attachment == DRI2BufferFrontLeft ?
 335                    &dst_priv->fence : NULL);
 336 }
 337
 338 Bool
 339 driScreenInit(ScreenPtr pScreen)
 340 {
 341     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 342     modesettingPtr ms = modesettingPTR(pScrn);
 343     DRI2InfoRec dri2info;
 344
 345 #if defined(DRI2INFOREC_VERSION)
 346     dri2info.version = DRI2INFOREC_VERSION;
 347 #else
 348     dri2info.version = 1;
 349 #endif
 350     dri2info.fd = ms->fd;
 351
 352     dri2info.driverName = pScrn->driverName;
 353     dri2info.deviceName = "/dev/dri/card0"; /* FIXME */
 354
 355 #if defined(DRI2INFOREC_VERSION) && DRI2INFOREC_VERSION > 2
 356     dri2info.CreateBuffer = driCreateBuffer;
 357     dri2info.DestroyBuffer = driDestroyBuffer;
 358 #else
 359     dri2info.CreateBuffers = driCreateBuffers;
 360     dri2info.DestroyBuffers = driDestroyBuffers;
 361 #endif
 362     dri2info.CopyRegion = driCopyRegion;
 363     dri2info.Wait = NULL;
 364
 365     ms->d_depth_bits_last =
 366          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_X8Z24_UNORM,
 367                                          PIPE_TEXTURE_2D,
 368                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 369     ms->ds_depth_bits_last =
 370          ms->screen->is_format_supported(ms->screen, PIPE_FORMAT_S8Z24_UNORM,
 371                                          PIPE_TEXTURE_2D,
 372                                          PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0);
 373
 374     return DRI2ScreenInit(pScreen, &dri2info);
 375 }
 376
 377 void
 378 driCloseScreen(ScreenPtr pScreen)
 379 {
 380     DRI2CloseScreen(pScreen);
 381 }
 382
 383 /* vim: set sw=4 ts=8 sts=4: */