src/glx/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 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  25
  26 #include <X11/Xlib.h>
  27 #include "glxclient.h"
  28 #include <dlfcn.h>
  29 #include "dri_common.h"
  30
  31 struct drisw_display
  32 {
  33    __GLXDRIdisplay base;
  34 };
  35
  36 struct drisw_context
  37 {
  38    struct glx_context base;
  39    __DRIcontext *driContext;
  40
  41 };
  42
  43 struct drisw_screen
  44 {
  45    struct glx_screen base;
  46
  47    __DRIscreen *driScreen;
  48    __GLXDRIscreen vtable;
  49    const __DRIcoreExtension *core;
  50    const __DRIswrastExtension *swrast;
  51    const __DRIconfig **driver_configs;
  52
  53    void *driver;
  54 };
  55
  56 struct drisw_drawable
  57 {
  58    __GLXDRIdrawable base;
  59
  60    GC gc;
  61    GC swapgc;
  62
  63    __DRIdrawable *driDrawable;
  64    XVisualInfo *visinfo;
  65    XImage *ximage;
  66 };
  67
  68 static Bool
  69 XCreateDrawable(struct drisw_drawable * pdp,
  70                 Display * dpy, XID drawable, int visualid)
  71 {
  72    XGCValues gcvalues;
  73    long visMask;
  74    XVisualInfo visTemp;
  75    int num_visuals;
  76
  77    /* create GC's */
  78    pdp->gc = XCreateGC(dpy, drawable, 0, NULL);
  79    pdp->swapgc = XCreateGC(dpy, drawable, 0, NULL);
  80
  81    gcvalues.function = GXcopy;
  82    gcvalues.graphics_exposures = False;
  83    XChangeGC(dpy, pdp->gc, GCFunction, &gcvalues);
  84    XChangeGC(dpy, pdp->swapgc, GCFunction, &gcvalues);
  85    XChangeGC(dpy, pdp->swapgc, GCGraphicsExposures, &gcvalues);
  86
  87    /* visual */
  88    visTemp.screen = DefaultScreen(dpy);
  89    visTemp.visualid = visualid;
  90    visMask = (VisualScreenMask | VisualIDMask);
  91    pdp->visinfo = XGetVisualInfo(dpy, visMask, &visTemp, &num_visuals);
  92
  93    /* create XImage */
  94    pdp->ximage = XCreateImage(dpy,
  95                               pdp->visinfo->visual,
  96                               pdp->visinfo->depth,
  97                               ZPixmap, 0,             /* format, offset */
  98                               NULL,                   /* data */
  99                               0, 0,                   /* width, height */
 100                               32,                     /* bitmap_pad */
 101                               0);                     /* bytes_per_line */
 102
 103    return True;
 104 }
 105
 106 static void
 107 XDestroyDrawable(struct drisw_drawable * pdp, Display * dpy, XID drawable)
 108 {
 109    XDestroyImage(pdp->ximage);
 110    XFree(pdp->visinfo);
 111
 112    XFreeGC(dpy, pdp->gc);
 113    XFreeGC(dpy, pdp->swapgc);
 114 }
 115
 116 /**
 117  * swrast loader functions
 118  */
 119
 120 static void
 121 swrastGetDrawableInfo(__DRIdrawable * draw,
 122                       int *x, int *y, int *w, int *h,
 123                       void *loaderPrivate)
 124 {
 125    struct drisw_drawable *pdp = loaderPrivate;
 126    __GLXDRIdrawable *pdraw = &(pdp->base);
 127    Display *dpy = pdraw->psc->dpy;
 128    Drawable drawable;
 129
 130    Window root;
 131    unsigned uw, uh, bw, depth;
 132
 133    drawable = pdraw->xDrawable;
 134
 135    XGetGeometry(dpy, drawable, &root, x, y, &uw, &uh, &bw, &depth);
 136    *w = uw;
 137    *h = uh;
 138 }
 139
 140 /**
 141  * Align renderbuffer pitch.
 142  *
 143  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 144  * should use the driver provided pitch.
 145  *
 146  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 147  * indirect rendering, not client-side libGL) requires that the pitch is
 148  * exactly the image width padded to 32 bits. XXX
 149  *
 150  * The above restriction can probably be overcome by using ScratchPixmap and
 151  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 152  * the scratch pixmap to 'pitch / cpp'.
 153  */
 154 static inline int
 155 bytes_per_line(unsigned pitch_bits, unsigned mul)
 156 {
 157    unsigned mask = mul - 1;
 158
 159    return ((pitch_bits + mask) & ~mask) / 8;
 160 }
 161
 162 static void
 163 swrastPutImage(__DRIdrawable * draw, int op,
 164                int x, int y, int w, int h,
 165                char *data, void *loaderPrivate)
 166 {
 167    struct drisw_drawable *pdp = loaderPrivate;
 168    __GLXDRIdrawable *pdraw = &(pdp->base);
 169    Display *dpy = pdraw->psc->dpy;
 170    Drawable drawable;
 171    XImage *ximage;
 172    GC gc;
 173
 174    switch (op) {
 175    case __DRI_SWRAST_IMAGE_OP_DRAW:
 176       gc = pdp->gc;
 177       break;
 178    case __DRI_SWRAST_IMAGE_OP_SWAP:
 179       gc = pdp->swapgc;
 180       break;
 181    default:
 182       return;
 183    }
 184
 185    drawable = pdraw->xDrawable;
 186
 187    ximage = pdp->ximage;
 188    ximage->data = data;
 189    ximage->width = w;
 190    ximage->height = h;
 191    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 192
 193    XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 194
 195    ximage->data = NULL;
 196 }
 197
 198 static void
 199 swrastGetImage(__DRIdrawable * read,
 200                int x, int y, int w, int h,
 201                char *data, void *loaderPrivate)
 202 {
 203    struct drisw_drawable *prp = loaderPrivate;
 204    __GLXDRIdrawable *pread = &(prp->base);
 205    Display *dpy = pread->psc->dpy;
 206    Drawable readable;
 207    XImage *ximage;
 208
 209    readable = pread->xDrawable;
 210
 211    ximage = prp->ximage;
 212    ximage->data = data;
 213    ximage->width = w;
 214    ximage->height = h;
 215    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 216
 217    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 218
 219    ximage->data = NULL;
 220 }
 221
 222 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 223    {__DRI_SWRAST_LOADER, __DRI_SWRAST_LOADER_VERSION},
 224    swrastGetDrawableInfo,
 225    swrastPutImage,
 226    swrastGetImage
 227 };
 228
 229 static const __DRIextension *loader_extensions[] = {
 230    &systemTimeExtension.base,
 231    &swrastLoaderExtension.base,
 232    NULL
 233 };
 234
 235 /**
 236  * GLXDRI functions
 237  */
 238
 239 static void
 240 drisw_destroy_context(struct glx_context *context)
 241 {
 242    struct drisw_context *pcp = (struct drisw_context *) context;
 243    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 244
 245    driReleaseDrawables(&pcp->base);
 246
 247    if (context->xid)
 248       glx_send_destroy_context(psc->base.dpy, context->xid);
 249
 250    if (context->extensions)
 251       XFree((char *) context->extensions);
 252
 253    (*psc->core->destroyContext) (pcp->driContext);
 254
 255    Xfree(pcp);
 256 }
 257
 258 static int
 259 drisw_bind_context(struct glx_context *context, struct glx_context *old,
 260                    GLXDrawable draw, GLXDrawable read)
 261 {
 262    struct drisw_context *pcp = (struct drisw_context *) context;
 263    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 264    struct drisw_drawable *pdraw, *pread;
 265
 266    pdraw = (struct drisw_drawable *) driFetchDrawable(context, draw);
 267    pread = (struct drisw_drawable *) driFetchDrawable(context, read);
 268
 269    driReleaseDrawables(&pcp->base);
 270
 271    if (pdraw == NULL || pread == NULL)
 272       return GLXBadDrawable;
 273
 274    if ((*psc->core->bindContext) (pcp->driContext,
 275                                   pdraw->driDrawable, pread->driDrawable))
 276       return Success;
 277
 278    return GLXBadContext;
 279 }
 280
 281 static void
 282 drisw_unbind_context(struct glx_context *context, struct glx_context *new)
 283 {
 284    struct drisw_context *pcp = (struct drisw_context *) context;
 285    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 286
 287    (*psc->core->unbindContext) (pcp->driContext);
 288 }
 289
 290 static const struct glx_context_vtable drisw_context_vtable = {
 291    drisw_destroy_context,
 292    drisw_bind_context,
 293    drisw_unbind_context,
 294    NULL,
 295    NULL,
 296    DRI_glXUseXFont,
 297    NULL,
 298    NULL,
 299    NULL, /* get_proc_address */
 300 };
 301
 302 static struct glx_context *
 303 drisw_create_context(struct glx_screen *base,
 304                      struct glx_config *config_base,
 305                      struct glx_context *shareList, int renderType)
 306 {
 307    struct drisw_context *pcp, *pcp_shared;
 308    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 309    struct drisw_screen *psc = (struct drisw_screen *) base;
 310    __DRIcontext *shared = NULL;
 311
 312    if (!psc->base.driScreen)
 313       return NULL;
 314
 315    if (shareList) {
 316       pcp_shared = (struct drisw_context *) shareList;
 317       shared = pcp_shared->driContext;
 318    }
 319
 320    pcp = Xmalloc(sizeof *pcp);
 321    if (pcp == NULL)
 322       return NULL;
 323
 324    memset(pcp, 0, sizeof *pcp);
 325    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 326       Xfree(pcp);
 327       return NULL;
 328    }
 329
 330    pcp->driContext =
 331       (*psc->core->createNewContext) (psc->driScreen,
 332                                       config->driConfig, shared, pcp);
 333    if (pcp->driContext == NULL) {
 334       Xfree(pcp);
 335       return NULL;
 336    }
 337
 338    pcp->base.vtable = &drisw_context_vtable;
 339
 340    return &pcp->base;
 341 }
 342
 343 static void
 344 driswDestroyDrawable(__GLXDRIdrawable * pdraw)
 345 {
 346    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 347    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 348
 349    (*psc->core->destroyDrawable) (pdp->driDrawable);
 350
 351    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 352    Xfree(pdp);
 353 }
 354
 355 static __GLXDRIdrawable *
 356 driswCreateDrawable(struct glx_screen *base, XID xDrawable,
 357                     GLXDrawable drawable, struct glx_config *modes)
 358 {
 359    struct drisw_drawable *pdp;
 360    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 361    struct drisw_screen *psc = (struct drisw_screen *) base;
 362
 363    const __DRIswrastExtension *swrast = psc->swrast;
 364
 365    pdp = Xmalloc(sizeof(*pdp));
 366    if (!pdp)
 367       return NULL;
 368
 369    memset(pdp, 0, sizeof *pdp);
 370    pdp->base.xDrawable = xDrawable;
 371    pdp->base.drawable = drawable;
 372    pdp->base.psc = &psc->base;
 373
 374    XCreateDrawable(pdp, psc->base.dpy, xDrawable, modes->visualID);
 375
 376    /* Create a new drawable */
 377    pdp->driDrawable =
 378       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 379
 380    if (!pdp->driDrawable) {
 381       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 382       Xfree(pdp);
 383       return NULL;
 384    }
 385
 386    pdp->base.destroyDrawable = driswDestroyDrawable;
 387
 388    return &pdp->base;
 389 }
 390
 391 static int64_t
 392 driswSwapBuffers(__GLXDRIdrawable * pdraw,
 393                  int64_t target_msc, int64_t divisor, int64_t remainder)
 394 {
 395    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 396    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 397
 398    (void) target_msc;
 399    (void) divisor;
 400    (void) remainder;
 401
 402    (*psc->core->swapBuffers) (pdp->driDrawable);
 403
 404    return 0;
 405 }
 406
 407 static void
 408 driswDestroyScreen(struct glx_screen *base)
 409 {
 410    struct drisw_screen *psc = (struct drisw_screen *) base;
 411
 412    /* Free the direct rendering per screen data */
 413    (*psc->core->destroyScreen) (psc->driScreen);
 414    driDestroyConfigs(psc->driver_configs);
 415    psc->driScreen = NULL;
 416    if (psc->driver)
 417       dlclose(psc->driver);
 418 }
 419
 420 static void *
 421 driOpenSwrast(void)
 422 {
 423    void *driver = NULL;
 424
 425    if (driver == NULL)
 426       driver = driOpenDriver("swrast");
 427
 428    if (driver == NULL)
 429       driver = driOpenDriver("swrastg");
 430
 431    return driver;
 432 }
 433
 434 static const struct glx_screen_vtable drisw_screen_vtable = {
 435    drisw_create_context
 436 };
 437
 438 static struct glx_screen *
 439 driswCreateScreen(int screen, struct glx_display *priv)
 440 {
 441    __GLXDRIscreen *psp;
 442    const __DRIconfig **driver_configs;
 443    const __DRIextension **extensions;
 444    struct drisw_screen *psc;
 445    int i;
 446
 447    psc = Xcalloc(1, sizeof *psc);
 448    if (psc == NULL)
 449       return NULL;
 450
 451    memset(psc, 0, sizeof *psc);
 452    if (!glx_screen_init(&psc->base, screen, priv)) {
 453       Xfree(psc);
 454       return NULL;
 455    }
 456
 457    psc->driver = driOpenSwrast();
 458    if (psc->driver == NULL)
 459       goto handle_error;
 460
 461    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 462    if (extensions == NULL) {
 463       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 464       goto handle_error;
 465    }
 466
 467    for (i = 0; extensions[i]; i++) {
 468       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 469          psc->core = (__DRIcoreExtension *) extensions[i];
 470       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 471          psc->swrast = (__DRIswrastExtension *) extensions[i];
 472    }
 473
 474    if (psc->core == NULL || psc->swrast == NULL) {
 475       ErrorMessageF("core dri extension not found\n");
 476       goto handle_error;
 477    }
 478
 479    psc->driScreen =
 480       psc->swrast->createNewScreen(screen, loader_extensions,
 481                                    &driver_configs, psc);
 482    if (psc->driScreen == NULL) {
 483       ErrorMessageF("failed to create dri screen\n");
 484       goto handle_error;
 485    }
 486
 487    psc->base.configs =
 488       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 489    psc->base.visuals =
 490       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 491
 492    psc->driver_configs = driver_configs;
 493
 494    psc->base.vtable = &drisw_screen_vtable;
 495    psp = &psc->vtable;
 496    psc->base.driScreen = psp;
 497    psp->destroyScreen = driswDestroyScreen;
 498    psp->createDrawable = driswCreateDrawable;
 499    psp->swapBuffers = driswSwapBuffers;
 500
 501    return &psc->base;
 502
 503  handle_error:
 504    if (psc->driver)
 505       dlclose(psc->driver);
 506    glx_screen_cleanup(&psc->base);
 507    Xfree(psc);
 508
 509    ErrorMessageF("reverting to indirect rendering\n");
 510
 511    return NULL;
 512 }
 513
 514 /* Called from __glXFreeDisplayPrivate.
 515  */
 516 static void
 517 driswDestroyDisplay(__GLXDRIdisplay * dpy)
 518 {
 519    Xfree(dpy);
 520 }
 521
 522 /*
 523  * Allocate, initialize and return a __DRIdisplayPrivate object.
 524  * This is called from __glXInitialize() when we are given a new
 525  * display pointer.
 526  */
 527 _X_HIDDEN __GLXDRIdisplay *
 528 driswCreateDisplay(Display * dpy)
 529 {
 530    struct drisw_display *pdpyp;
 531
 532    pdpyp = Xmalloc(sizeof *pdpyp);
 533    if (pdpyp == NULL)
 534       return NULL;
 535
 536    pdpyp->base.destroyDisplay = driswDestroyDisplay;
 537    pdpyp->base.createScreen = driswCreateScreen;
 538
 539    return &pdpyp->base;
 540 }
 541
 542 #endif /* GLX_DIRECT_RENDERING */