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