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