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