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