src/glx/x11/drisw_glx.c

   1 /*
   2  * Copyright 2008 George Sapountzis
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #ifdef GLX_DIRECT_RENDERING
  25
  26 #include <X11/Xlib.h>
  27 #include "glxclient.h"
  28 #include "glcontextmodes.h"
  29 #include <dlfcn.h>
  30 #include "dri_common.h"
  31
  32 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  33 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  34 typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
  35
  36 struct __GLXDRIdisplayPrivateRec {
  37     __GLXDRIdisplay base;
  38 };
  39
  40 struct __GLXDRIcontextPrivateRec {
  41     __GLXDRIcontext base;
  42     __DRIcontext *driContext;
  43     __GLXscreenConfigs *psc;
  44 };
  45
  46 struct __GLXDRIdrawablePrivateRec {
  47     __GLXDRIdrawable base;
  48
  49     GC gc;
  50     GC swapgc;
  51
  52     XVisualInfo *visinfo;
  53     XImage *ximage;
  54     int bpp;
  55 };
  56
  57 /**
  58  * swrast loader functions
  59  */
  60
  61 static Bool XCreateDrawable(__GLXDRIdrawablePrivate *pdp,
  62                             Display *dpy, XID drawable, int visualid)
  63 {
  64     XGCValues gcvalues;
  65     long visMask;
  66     XVisualInfo visTemp;
  67     int num_visuals;
  68
  69     /* create GC's */
  70     pdp->gc = XCreateGC(dpy, drawable, 0, NULL);
  71     pdp->swapgc = XCreateGC(dpy, drawable, 0, NULL);
  72
  73     gcvalues.function = GXcopy;
  74     gcvalues.graphics_exposures = False;
  75     XChangeGC(dpy, pdp->gc, GCFunction, &gcvalues);
  76     XChangeGC(dpy, pdp->swapgc, GCFunction, &gcvalues);
  77     XChangeGC(dpy, pdp->swapgc, GCGraphicsExposures, &gcvalues);
  78
  79     /* create XImage  */
  80     visTemp.screen = DefaultScreen(dpy);
  81     visTemp.visualid = visualid;
  82     visMask = (VisualScreenMask | VisualIDMask);
  83     pdp->visinfo = XGetVisualInfo(dpy, visMask, &visTemp, &num_visuals);
  84
  85     pdp->ximage = XCreateImage(dpy,
  86                                pdp->visinfo->visual,
  87                                pdp->visinfo->depth,
  88                                ZPixmap, 0,   /* format, offset */
  89                                NULL,         /* data */
  90                                0, 0,         /* size */
  91                                32,           /* bitmap_pad */
  92                                0);           /* bytes_per_line */
  93
  94     /* get the true number of bits per pixel */
  95     pdp->bpp = pdp->ximage->bits_per_pixel;
  96
  97     return True;
  98 }
  99
 100 static void XDestroyDrawable(__GLXDRIdrawablePrivate *pdp,
 101                              Display *dpy, XID drawable)
 102 {
 103     XDestroyImage(pdp->ximage);
 104     XFree(pdp->visinfo);
 105
 106     XFreeGC(dpy, pdp->gc);
 107     XFreeGC(dpy, pdp->swapgc);
 108 }
 109
 110 static void
 111 swrastGetDrawableInfo(__DRIdrawable *draw,
 112                       int *x, int *y, int *w, int *h,
 113                       void *loaderPrivate)
 114 {
 115     __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 116     __GLXDRIdrawable *pdraw = &(pdp->base);;
 117     Display *dpy = pdraw->psc->dpy;
 118     Drawable drawable;
 119
 120     Window root;
 121     Status stat;
 122     unsigned int bw, depth;
 123
 124     drawable = pdraw->xDrawable;
 125
 126     stat = XGetGeometry(dpy, drawable, &root,
 127                         x, y, (unsigned int *)w, (unsigned int *)h,
 128                         &bw, &depth);
 129 }
 130
 131 static inline int
 132 bytes_per_line(int w, int bpp, unsigned mul)
 133 {
 134     unsigned mask = mul - 1;
 135
 136     return ((w * bpp + mask) & ~mask) / 8;
 137 }
 138
 139 static void
 140 swrastPutImage(__DRIdrawable *draw, int op,
 141                int x, int y, int w, int h, char *data,
 142                void *loaderPrivate)
 143 {
 144     __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 145     __GLXDRIdrawable *pdraw = &(pdp->base);;
 146     Display *dpy = pdraw->psc->dpy;
 147     Drawable drawable;
 148     XImage *ximage;
 149     GC gc;
 150
 151     switch (op) {
 152     case __DRI_SWRAST_IMAGE_OP_DRAW:
 153         gc = pdp->gc;
 154         break;
 155     case __DRI_SWRAST_IMAGE_OP_SWAP:
 156         gc = pdp->swapgc;
 157         break;
 158     default:
 159         return;
 160     }
 161
 162     drawable = pdraw->xDrawable;
 163
 164     ximage = pdp->ximage;
 165     ximage->data = data;
 166     ximage->width = w;
 167     ximage->height = h;
 168     ximage->bytes_per_line = bytes_per_line(w, pdp->bpp, 32);
 169
 170     XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 171
 172     ximage->data = NULL;
 173 }
 174
 175 static void
 176 swrastGetImage(__DRIdrawable *draw,
 177                int x, int y, int w, int h, char *data,
 178                void *loaderPrivate)
 179 {
 180     __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 181     __GLXDRIdrawable *pdraw = &(pdp->base);;
 182     Display *dpy = pdraw->psc->dpy;
 183     Drawable drawable;
 184     XImage *ximage;
 185
 186     drawable = pdraw->xDrawable;
 187
 188     ximage = pdp->ximage;
 189     ximage->data = data;
 190     ximage->width = w;
 191     ximage->height = h;
 192     ximage->bytes_per_line = bytes_per_line(w, pdp->bpp, 32);
 193
 194     XGetSubImage(dpy, drawable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 195
 196     ximage->data = NULL;
 197 }
 198
 199 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 200     { __DRI_SWRAST_LOADER, __DRI_SWRAST_LOADER_VERSION },
 201     swrastGetDrawableInfo,
 202     swrastPutImage,
 203     swrastGetImage
 204 };
 205
 206 static const __DRIextension *loader_extensions[] = {
 207     &systemTimeExtension.base,
 208     &swrastLoaderExtension.base,
 209     NULL
 210 };
 211
 212 /**
 213  * GLXDRI functions
 214  */
 215
 216 static void driDestroyContext(__GLXDRIcontext *context,
 217                               __GLXscreenConfigs *psc, Display *dpy)
 218 {
 219     __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 220     const __DRIcoreExtension *core = pcp->psc->core;
 221
 222     (*core->destroyContext)(pcp->driContext);
 223
 224     Xfree(pcp);
 225 }
 226
 227 static Bool driBindContext(__GLXDRIcontext *context,
 228                            __GLXDRIdrawable *draw, __GLXDRIdrawable *read)
 229 {
 230     __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 231     const __DRIcoreExtension *core = pcp->psc->core;
 232
 233     return (*core->bindContext)(pcp->driContext,
 234                                 draw->driDrawable,
 235                                 read->driDrawable);
 236 }
 237
 238 static void driUnbindContext(__GLXDRIcontext *context)
 239 {
 240     __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 241     const __DRIcoreExtension *core = pcp->psc->core;
 242
 243     (*core->unbindContext)(pcp->driContext);
 244 }
 245
 246 static __GLXDRIcontext *driCreateContext(__GLXscreenConfigs *psc,
 247                                          const __GLcontextModes *mode,
 248                                          GLXContext gc,
 249                                          GLXContext shareList, int renderType)
 250 {
 251     __GLXDRIcontextPrivate *pcp, *pcp_shared;
 252     __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 253     const __DRIcoreExtension *core = psc->core;
 254     __DRIcontext *shared = NULL;
 255
 256     if (!psc || !psc->driScreen)
 257         return NULL;
 258
 259     if (shareList) {
 260         pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 261         shared = pcp_shared->driContext;
 262     }
 263
 264     pcp = Xmalloc(sizeof *pcp);
 265     if (pcp == NULL)
 266         return NULL;
 267
 268     pcp->psc = psc;
 269     pcp->driContext =
 270         (*core->createNewContext)(psc->__driScreen,
 271                                   config->driConfig, shared, pcp);
 272     if (pcp->driContext == NULL) {
 273         Xfree(pcp);
 274         return NULL;
 275     }
 276
 277     pcp->base.destroyContext = driDestroyContext;
 278     pcp->base.bindContext = driBindContext;
 279     pcp->base.unbindContext = driUnbindContext;
 280
 281     return &pcp->base;
 282 }
 283
 284 static void driDestroyDrawable(__GLXDRIdrawable *pdraw)
 285 {
 286     __GLXDRIdrawablePrivate *pdp = (__GLXDRIdrawablePrivate *) pdraw;
 287     const __DRIcoreExtension *core = pdraw->psc->core;
 288
 289     (*core->destroyDrawable)(pdraw->driDrawable);
 290
 291     XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 292     Xfree(pdp);
 293 }
 294
 295 static __GLXDRIdrawable *driCreateDrawable(__GLXscreenConfigs *psc,
 296                                            XID xDrawable,
 297                                            GLXDrawable drawable,
 298                                            const __GLcontextModes *modes)
 299 {
 300     __GLXDRIdrawable *pdraw;
 301     __GLXDRIdrawablePrivate *pdp;
 302     __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 303     const __DRIswrastExtension *swrast = psc->swrast;
 304
 305     /* Old dri can't handle GLX 1.3+ drawable constructors. */
 306     if (xDrawable != drawable)
 307         return NULL;
 308
 309     pdp = Xmalloc(sizeof(*pdp));
 310     if (!pdp)
 311         return NULL;
 312
 313     pdraw = &(pdp->base);
 314     pdraw->xDrawable = xDrawable;
 315     pdraw->drawable = drawable;
 316     pdraw->psc = psc;
 317
 318     XCreateDrawable(pdp, psc->dpy, xDrawable, modes->visualID);
 319
 320     /* Create a new drawable */
 321     pdraw->driDrawable =
 322         (*swrast->createNewDrawable)(psc->__driScreen,
 323                                      config->driConfig,
 324                                      pdp);
 325
 326     if (!pdraw->driDrawable) {
 327         XDestroyDrawable(pdp, psc->dpy, xDrawable);
 328         Xfree(pdp);
 329         return NULL;
 330     }
 331
 332     pdraw->destroyDrawable = driDestroyDrawable;
 333
 334     return pdraw;
 335 }
 336
 337 static void driSwapBuffers(__GLXDRIdrawable *pdraw)
 338 {
 339     (*pdraw->psc->core->swapBuffers)(pdraw->driDrawable);
 340 }
 341
 342 static void driDestroyScreen(__GLXscreenConfigs *psc)
 343 {
 344     /* Free the direct rendering per screen data */
 345     (*psc->core->destroyScreen)(psc->__driScreen);
 346     psc->__driScreen = NULL;
 347     if (psc->driver)
 348         dlclose(psc->driver);
 349 }
 350
 351 static __GLXDRIscreen *driCreateScreen(__GLXscreenConfigs *psc, int screen,
 352                                        __GLXdisplayPrivate *priv)
 353 {
 354     __GLXDRIscreen *psp;
 355     const __DRIconfig **driver_configs;
 356     const __DRIextension **extensions;
 357     const char *driverName = "swrast";
 358     int i;
 359
 360     psp = Xmalloc(sizeof *psp);
 361     if (psp == NULL)
 362         return NULL;
 363
 364     /* Initialize per screen dynamic client GLX extensions */
 365     psc->ext_list_first_time = GL_TRUE;
 366
 367     psc->driver = driOpenDriver(driverName);
 368     if (psc->driver == NULL)
 369         goto handle_error;
 370
 371     extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 372     if (extensions == NULL) {
 373         ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 374         goto handle_error;
 375     }
 376
 377     for (i = 0; extensions[i]; i++) {
 378         if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 379             psc->core = (__DRIcoreExtension *) extensions[i];
 380         if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 381             psc->swrast = (__DRIswrastExtension *) extensions[i];
 382     }
 383
 384     if (psc->core == NULL || psc->swrast == NULL) {
 385         ErrorMessageF("core dri extension not found\n");
 386         goto handle_error;
 387     }
 388
 389     psc->__driScreen =
 390         psc->swrast->createNewScreen(screen,
 391                                      loader_extensions, &driver_configs, psc);
 392     if (psc->__driScreen == NULL) {
 393         ErrorMessageF("failed to create dri screen\n");
 394         goto handle_error;
 395     }
 396
 397     driBindExtensions(psc, 0);
 398
 399     psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 400     psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 401
 402     psp->destroyScreen = driDestroyScreen;
 403     psp->createContext = driCreateContext;
 404     psp->createDrawable = driCreateDrawable;
 405     psp->swapBuffers = driSwapBuffers;
 406
 407     return psp;
 408
 409  handle_error:
 410     Xfree(psp);
 411
 412     if (psc->driver)
 413         dlclose(psc->driver);
 414
 415     ErrorMessageF("reverting to indirect rendering\n");
 416
 417     return NULL;
 418 }
 419
 420 /* Called from __glXFreeDisplayPrivate.
 421  */
 422 static void driDestroyDisplay(__GLXDRIdisplay *dpy)
 423 {
 424     Xfree(dpy);
 425 }
 426
 427 /*
 428  * Allocate, initialize and return a __DRIdisplayPrivate object.
 429  * This is called from __glXInitialize() when we are given a new
 430  * display pointer.
 431  */
 432 _X_HIDDEN __GLXDRIdisplay *driswCreateDisplay(Display *dpy)
 433 {
 434     __GLXDRIdisplayPrivate *pdpyp;
 435
 436     pdpyp = Xmalloc(sizeof *pdpyp);
 437     if (pdpyp == NULL)
 438         return NULL;
 439
 440     pdpyp->base.destroyDisplay = driDestroyDisplay;
 441     pdpyp->base.createScreen = driCreateScreen;
 442
 443     return &pdpyp->base;
 444 }
 445
 446 #endif /* GLX_DIRECT_RENDERING */