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