src/glx/x11/dri2_glx.c

   1 /*
   2  * Copyright © 2008 Red Hat, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Soft-
   6  * ware"), to deal in the Software without restriction, including without
   7  * limitation the rights to use, copy, modify, merge, publish, distribute,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, provided that the above copyright
  10  * notice(s) and this permission notice appear in all copies of the Soft-
  11  * ware and that both the above copyright notice(s) and this permission
  12  * notice appear in supporting documentation.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  16  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  17  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  18  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  19  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  22  * MANCE OF THIS SOFTWARE.
  23  *
  24  * Except as contained in this notice, the name of a copyright holder shall
  25  * not be used in advertising or otherwise to promote the sale, use or
  26  * other dealings in this Software without prior written authorization of
  27  * the copyright holder.
  28  *
  29  * Authors:
  30  *   Kristian Høgsberg (krh@redhat.com)
  31  */
  32
  33 #ifdef GLX_DIRECT_RENDERING
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include <X11/extensions/Xdamage.h>
  38 #include "glxclient.h"
  39 #include "glcontextmodes.h"
  40 #include "xf86dri.h"
  41 #include <dlfcn.h>
  42 #include <fcntl.h>
  43 #include <unistd.h>
  44 #include <sys/types.h>
  45 #include <sys/mman.h>
  46 #include "xf86drm.h"
  47 #include "dri2.h"
  48 #include "dri_common.h"
  49
  50 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  51 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  52 typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
  53
  54 struct __GLXDRIdisplayPrivateRec {
  55     __GLXDRIdisplay base;
  56
  57     /*
  58     ** XFree86-DRI version information
  59     */
  60     int driMajor;
  61     int driMinor;
  62     int driPatch;
  63 };
  64
  65 struct __GLXDRIcontextPrivateRec {
  66     __GLXDRIcontext base;
  67     __DRIcontext *driContext;
  68     __GLXscreenConfigs *psc;
  69 };
  70
  71 struct __GLXDRIdrawablePrivateRec {
  72     __GLXDRIdrawable base;
  73     __DRIbuffer buffers[5];
  74     int bufferCount;
  75     int width, height;
  76 };
  77
  78 static void dri2DestroyContext(__GLXDRIcontext *context,
  79                               __GLXscreenConfigs *psc, Display *dpy)
  80 {
  81     __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
  82     const __DRIcoreExtension *core = pcp->psc->core;
  83
  84     (*core->destroyContext)(pcp->driContext);
  85
  86     Xfree(pcp);
  87 }
  88
  89 static Bool dri2BindContext(__GLXDRIcontext *context,
  90                            __GLXDRIdrawable *draw, __GLXDRIdrawable *read)
  91 {
  92     __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
  93     const __DRIcoreExtension *core = pcp->psc->core;
  94
  95     return (*core->bindContext)(pcp->driContext,
  96                                 draw->driDrawable,
  97                                 read->driDrawable);
  98 }
  99
 100 static void dri2UnbindContext(__GLXDRIcontext *context)
 101 {
 102     __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 103     const __DRIcoreExtension *core = pcp->psc->core;
 104
 105     (*core->unbindContext)(pcp->driContext);
 106 }
 107
 108 static __GLXDRIcontext *dri2CreateContext(__GLXscreenConfigs *psc,
 109                                          const __GLcontextModes *mode,
 110                                          GLXContext gc,
 111                                          GLXContext shareList, int renderType)
 112 {
 113     __GLXDRIcontextPrivate *pcp, *pcp_shared;
 114     __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 115     __DRIcontext *shared = NULL;
 116
 117     if (shareList) {
 118         pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 119         shared = pcp_shared->driContext;
 120     }
 121
 122     pcp = Xmalloc(sizeof *pcp);
 123     if (pcp == NULL)
 124         return NULL;
 125
 126     pcp->psc = psc;
 127     pcp->driContext =
 128         (*psc->dri2->createNewContext)(psc->__driScreen,
 129                                        config->driConfig, shared, pcp);
 130     gc->__driContext = pcp->driContext;
 131
 132     if (pcp->driContext == NULL) {
 133         Xfree(pcp);
 134         return NULL;
 135     }
 136
 137     pcp->base.destroyContext = dri2DestroyContext;
 138     pcp->base.bindContext = dri2BindContext;
 139     pcp->base.unbindContext = dri2UnbindContext;
 140
 141     return &pcp->base;
 142 }
 143
 144 static void dri2DestroyDrawable(__GLXDRIdrawable *pdraw)
 145 {
 146     const __DRIcoreExtension *core = pdraw->psc->core;
 147
 148     (*core->destroyDrawable)(pdraw->driDrawable);
 149     DRI2DestroyDrawable(pdraw->psc->dpy, pdraw->drawable);
 150     Xfree(pdraw);
 151 }
 152
 153 static __GLXDRIdrawable *dri2CreateDrawable(__GLXscreenConfigs *psc,
 154                                             XID xDrawable,
 155                                             GLXDrawable drawable,
 156                                             const __GLcontextModes *modes)
 157 {
 158     __GLXDRIdrawablePrivate *pdraw;
 159     __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 160
 161     pdraw = Xmalloc(sizeof(*pdraw));
 162     if (!pdraw)
 163         return NULL;
 164
 165     pdraw->base.destroyDrawable = dri2DestroyDrawable;
 166     pdraw->base.xDrawable = xDrawable;
 167     pdraw->base.drawable = drawable;
 168     pdraw->base.psc = psc;
 169
 170     DRI2CreateDrawable(psc->dpy, xDrawable);
 171
 172     /* Create a new drawable */
 173     pdraw->base.driDrawable =
 174         (*psc->dri2->createNewDrawable)(psc->__driScreen,
 175                                         config->driConfig, pdraw);
 176
 177     if (!pdraw->base.driDrawable) {
 178         DRI2DestroyDrawable(psc->dpy, drawable);
 179         Xfree(pdraw);
 180         return NULL;
 181     }
 182
 183     return &pdraw->base;
 184 }
 185
 186 static void dri2CopySubBuffer(__GLXDRIdrawable *pdraw,
 187                               int x, int y, int width, int height)
 188 {
 189     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 190     XRectangle xrect;
 191     XserverRegion region;
 192
 193     xrect.x = x;
 194     xrect.y = priv->height - y - height;
 195     xrect.width = width;
 196     xrect.height = height;
 197
 198     region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 199     DRI2CopyRegion(pdraw->psc->dpy, pdraw->drawable, region,
 200                    DRI2BufferFrontLeft, DRI2BufferBackLeft);
 201     XFixesDestroyRegion(pdraw->psc->dpy, region);
 202 }
 203
 204 static void dri2SwapBuffers(__GLXDRIdrawable *pdraw)
 205 {
 206     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 207
 208     dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 209 }
 210
 211 static void dri2DestroyScreen(__GLXscreenConfigs *psc)
 212 {
 213     /* Free the direct rendering per screen data */
 214     (*psc->core->destroyScreen)(psc->__driScreen);
 215     close(psc->fd);
 216     psc->__driScreen = NULL;
 217 }
 218
 219 static __DRIbuffer *
 220 dri2GetBuffers(__DRIdrawable *driDrawable,
 221                int *width, int *height,
 222                unsigned int *attachments, int count,
 223                int *out_count, void *loaderPrivate)
 224 {
 225     __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 226     DRI2Buffer *buffers;
 227     int i;
 228
 229     buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 230                              width, height, attachments, count, out_count);
 231     if (buffers == NULL)
 232        return NULL;
 233
 234     pdraw->width = *width;
 235     pdraw->height = *height;
 236
 237     /* This assumes the DRI2 buffer attachment tokens matches the
 238      * __DRIbuffer tokens. */
 239     for (i = 0; i < *out_count; i++) {
 240         pdraw->buffers[i].attachment = buffers[i].attachment;
 241         pdraw->buffers[i].name = buffers[i].name;
 242         pdraw->buffers[i].pitch = buffers[i].pitch;
 243         pdraw->buffers[i].cpp = buffers[i].cpp;
 244         pdraw->buffers[i].flags = buffers[i].flags;
 245     }
 246
 247     Xfree(buffers);
 248
 249     return pdraw->buffers;
 250 }
 251
 252 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 253     { __DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION },
 254     dri2GetBuffers,
 255 };
 256
 257 static const __DRIextension *loader_extensions[] = {
 258     &dri2LoaderExtension.base,
 259     &systemTimeExtension.base,
 260     NULL
 261 };
 262
 263 static __GLXDRIscreen *dri2CreateScreen(__GLXscreenConfigs *psc, int screen,
 264                                         __GLXdisplayPrivate *priv)
 265 {
 266     const __DRIconfig **driver_configs;
 267     const __DRIextension **extensions;
 268     __GLXDRIscreen *psp;
 269     char *driverName, *deviceName;
 270     drm_magic_t magic;
 271     int i;
 272
 273     psp = Xmalloc(sizeof *psp);
 274     if (psp == NULL)
 275         return NULL;
 276
 277     /* Initialize per screen dynamic client GLX extensions */
 278     psc->ext_list_first_time = GL_TRUE;
 279
 280     if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
 281                      &driverName, &deviceName))
 282         return NULL;
 283
 284     psc->driver = driOpenDriver(driverName);
 285     if (psc->driver == NULL)
 286         goto handle_error;
 287
 288     extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 289     if (extensions == NULL) {
 290         ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 291         goto handle_error;
 292     }
 293
 294     for (i = 0; extensions[i]; i++) {
 295         if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 296             psc->core = (__DRIcoreExtension *) extensions[i];
 297         if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 298             psc->dri2 = (__DRIdri2Extension *) extensions[i];
 299     }
 300
 301     if (psc->core == NULL || psc->dri2 == NULL) {
 302         ErrorMessageF("core dri or dri2 extension not found\n");
 303         goto handle_error;
 304     }
 305
 306     psc->fd = open(deviceName, O_RDWR);
 307     if (psc->fd < 0) {
 308         ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 309         return NULL;
 310     }
 311
 312     if (drmGetMagic(psc->fd, &magic))
 313         return NULL;
 314
 315     if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic))
 316         return NULL;
 317
 318     psc->__driScreen =
 319         psc->dri2->createNewScreen(screen, psc->fd,
 320                                    loader_extensions, &driver_configs, psc);
 321     if (psc->__driScreen == NULL) {
 322         ErrorMessageF("failed to create dri screen\n");
 323         return NULL;
 324     }
 325
 326     driBindExtensions(psc, 1);
 327
 328     psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 329     psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 330
 331     psp->destroyScreen = dri2DestroyScreen;
 332     psp->createContext = dri2CreateContext;
 333     psp->createDrawable = dri2CreateDrawable;
 334     psp->swapBuffers = dri2SwapBuffers;
 335
 336     /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 337      * available.*/
 338     psp->copySubBuffer = dri2CopySubBuffer;
 339     __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 340
 341     Xfree(driverName);
 342     Xfree(deviceName);
 343
 344     return psp;
 345
 346  handle_error:
 347     Xfree(driverName);
 348     Xfree(deviceName);
 349
 350     /* FIXME: clean up here */
 351
 352     return NULL;
 353 }
 354
 355 /* Called from __glXFreeDisplayPrivate.
 356  */
 357 static void dri2DestroyDisplay(__GLXDRIdisplay *dpy)
 358 {
 359     Xfree(dpy);
 360 }
 361
 362 /*
 363  * Allocate, initialize and return a __DRIdisplayPrivate object.
 364  * This is called from __glXInitialize() when we are given a new
 365  * display pointer.
 366  */
 367 _X_HIDDEN __GLXDRIdisplay *dri2CreateDisplay(Display *dpy)
 368 {
 369     __GLXDRIdisplayPrivate *pdp;
 370     int eventBase, errorBase;
 371
 372     if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 373         return NULL;
 374
 375     pdp = Xmalloc(sizeof *pdp);
 376     if (pdp == NULL)
 377         return NULL;
 378
 379     if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 380         Xfree(pdp);
 381         return NULL;
 382     }
 383
 384     pdp->driPatch = 0;
 385
 386     pdp->base.destroyDisplay = dri2DestroyDisplay;
 387     pdp->base.createScreen = dri2CreateScreen;
 388
 389     return &pdp->base;
 390 }
 391
 392 #endif /* GLX_DIRECT_RENDERING */