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   /**
 104    * swrast does not handle 24-bit depth with 24 bpp, so let X do the
 105    * the conversion for us.
 106    */
 107   if (pdp->ximage->bits_per_pixel == 24)
 108      pdp->ximage->bits_per_pixel = 32;
 109
 110    return True;
 111 }
 112
 113 static void
 114 XDestroyDrawable(struct drisw_drawable * pdp, Display * dpy, XID drawable)
 115 {
 116    XDestroyImage(pdp->ximage);
 117    XFree(pdp->visinfo);
 118
 119    XFreeGC(dpy, pdp->gc);
 120    XFreeGC(dpy, pdp->swapgc);
 121 }
 122
 123 /**
 124  * swrast loader functions
 125  */
 126
 127 static void
 128 swrastGetDrawableInfo(__DRIdrawable * draw,
 129                       int *x, int *y, int *w, int *h,
 130                       void *loaderPrivate)
 131 {
 132    struct drisw_drawable *pdp = loaderPrivate;
 133    __GLXDRIdrawable *pdraw = &(pdp->base);
 134    Display *dpy = pdraw->psc->dpy;
 135    Drawable drawable;
 136
 137    Window root;
 138    unsigned uw, uh, bw, depth;
 139
 140    drawable = pdraw->xDrawable;
 141
 142    XGetGeometry(dpy, drawable, &root, x, y, &uw, &uh, &bw, &depth);
 143    *w = uw;
 144    *h = uh;
 145 }
 146
 147 /**
 148  * Align renderbuffer pitch.
 149  *
 150  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 151  * should use the driver provided pitch.
 152  *
 153  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 154  * indirect rendering, not client-side libGL) requires that the pitch is
 155  * exactly the image width padded to 32 bits. XXX
 156  *
 157  * The above restriction can probably be overcome by using ScratchPixmap and
 158  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 159  * the scratch pixmap to 'pitch / cpp'.
 160  */
 161 static inline int
 162 bytes_per_line(unsigned pitch_bits, unsigned mul)
 163 {
 164    unsigned mask = mul - 1;
 165
 166    return ((pitch_bits + mask) & ~mask) / 8;
 167 }
 168
 169 static void
 170 swrastPutImage(__DRIdrawable * draw, int op,
 171                int x, int y, int w, int h,
 172                char *data, void *loaderPrivate)
 173 {
 174    struct drisw_drawable *pdp = loaderPrivate;
 175    __GLXDRIdrawable *pdraw = &(pdp->base);
 176    Display *dpy = pdraw->psc->dpy;
 177    Drawable drawable;
 178    XImage *ximage;
 179    GC gc;
 180
 181    switch (op) {
 182    case __DRI_SWRAST_IMAGE_OP_DRAW:
 183       gc = pdp->gc;
 184       break;
 185    case __DRI_SWRAST_IMAGE_OP_SWAP:
 186       gc = pdp->swapgc;
 187       break;
 188    default:
 189       return;
 190    }
 191
 192    drawable = pdraw->xDrawable;
 193
 194    ximage = pdp->ximage;
 195    ximage->data = data;
 196    ximage->width = w;
 197    ximage->height = h;
 198    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 199
 200    XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 201
 202    ximage->data = NULL;
 203 }
 204
 205 static void
 206 swrastGetImage(__DRIdrawable * read,
 207                int x, int y, int w, int h,
 208                char *data, void *loaderPrivate)
 209 {
 210    struct drisw_drawable *prp = loaderPrivate;
 211    __GLXDRIdrawable *pread = &(prp->base);
 212    Display *dpy = pread->psc->dpy;
 213    Drawable readable;
 214    XImage *ximage;
 215
 216    readable = pread->xDrawable;
 217
 218    ximage = prp->ximage;
 219    ximage->data = data;
 220    ximage->width = w;
 221    ximage->height = h;
 222    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 223
 224    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 225
 226    ximage->data = NULL;
 227 }
 228
 229 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 230    {__DRI_SWRAST_LOADER, __DRI_SWRAST_LOADER_VERSION},
 231    swrastGetDrawableInfo,
 232    swrastPutImage,
 233    swrastGetImage
 234 };
 235
 236 static const __DRIextension *loader_extensions[] = {
 237    &systemTimeExtension.base,
 238    &swrastLoaderExtension.base,
 239    NULL
 240 };
 241
 242 /**
 243  * GLXDRI functions
 244  */
 245
 246 static void
 247 drisw_destroy_context(struct glx_context *context)
 248 {
 249    struct drisw_context *pcp = (struct drisw_context *) context;
 250    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 251
 252    driReleaseDrawables(&pcp->base);
 253
 254    if (context->xid)
 255       glx_send_destroy_context(psc->base.dpy, context->xid);
 256
 257    if (context->extensions)
 258       XFree((char *) context->extensions);
 259
 260    (*psc->core->destroyContext) (pcp->driContext);
 261
 262    Xfree(pcp);
 263 }
 264
 265 static int
 266 drisw_bind_context(struct glx_context *context, struct glx_context *old,
 267                    GLXDrawable draw, GLXDrawable read)
 268 {
 269    struct drisw_context *pcp = (struct drisw_context *) context;
 270    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 271    struct drisw_drawable *pdraw, *pread;
 272
 273    pdraw = (struct drisw_drawable *) driFetchDrawable(context, draw);
 274    pread = (struct drisw_drawable *) driFetchDrawable(context, read);
 275
 276    driReleaseDrawables(&pcp->base);
 277
 278    if (pdraw == NULL || pread == NULL)
 279       return GLXBadDrawable;
 280
 281    if ((*psc->core->bindContext) (pcp->driContext,
 282                                   pdraw->driDrawable, pread->driDrawable))
 283       return Success;
 284
 285    return GLXBadContext;
 286 }
 287
 288 static void
 289 drisw_unbind_context(struct glx_context *context, struct glx_context *new)
 290 {
 291    struct drisw_context *pcp = (struct drisw_context *) context;
 292    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 293
 294    (*psc->core->unbindContext) (pcp->driContext);
 295 }
 296
 297 static const struct glx_context_vtable drisw_context_vtable = {
 298    drisw_destroy_context,
 299    drisw_bind_context,
 300    drisw_unbind_context,
 301    NULL,
 302    NULL,
 303    DRI_glXUseXFont,
 304    NULL,
 305    NULL,
 306    NULL, /* get_proc_address */
 307 };
 308
 309 static struct glx_context *
 310 drisw_create_context(struct glx_screen *base,
 311                      struct glx_config *config_base,
 312                      struct glx_context *shareList, int renderType)
 313 {
 314    struct drisw_context *pcp, *pcp_shared;
 315    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 316    struct drisw_screen *psc = (struct drisw_screen *) base;
 317    __DRIcontext *shared = NULL;
 318
 319    if (!psc->base.driScreen)
 320       return NULL;
 321
 322    if (shareList) {
 323       pcp_shared = (struct drisw_context *) shareList;
 324       shared = pcp_shared->driContext;
 325    }
 326
 327    pcp = Xmalloc(sizeof *pcp);
 328    if (pcp == NULL)
 329       return NULL;
 330
 331    memset(pcp, 0, sizeof *pcp);
 332    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 333       Xfree(pcp);
 334       return NULL;
 335    }
 336
 337    pcp->driContext =
 338       (*psc->core->createNewContext) (psc->driScreen,
 339                                       config->driConfig, shared, pcp);
 340    if (pcp->driContext == NULL) {
 341       Xfree(pcp);
 342       return NULL;
 343    }
 344
 345    pcp->base.vtable = &drisw_context_vtable;
 346
 347    return &pcp->base;
 348 }
 349
 350 static void
 351 driswDestroyDrawable(__GLXDRIdrawable * pdraw)
 352 {
 353    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 354    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 355
 356    (*psc->core->destroyDrawable) (pdp->driDrawable);
 357
 358    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 359    Xfree(pdp);
 360 }
 361
 362 static __GLXDRIdrawable *
 363 driswCreateDrawable(struct glx_screen *base, XID xDrawable,
 364                     GLXDrawable drawable, struct glx_config *modes)
 365 {
 366    struct drisw_drawable *pdp;
 367    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 368    struct drisw_screen *psc = (struct drisw_screen *) base;
 369
 370    const __DRIswrastExtension *swrast = psc->swrast;
 371
 372    pdp = Xmalloc(sizeof(*pdp));
 373    if (!pdp)
 374       return NULL;
 375
 376    memset(pdp, 0, sizeof *pdp);
 377    pdp->base.xDrawable = xDrawable;
 378    pdp->base.drawable = drawable;
 379    pdp->base.psc = &psc->base;
 380
 381    XCreateDrawable(pdp, psc->base.dpy, xDrawable, modes->visualID);
 382
 383    /* Create a new drawable */
 384    pdp->driDrawable =
 385       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 386
 387    if (!pdp->driDrawable) {
 388       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 389       Xfree(pdp);
 390       return NULL;
 391    }
 392
 393    pdp->base.destroyDrawable = driswDestroyDrawable;
 394
 395    return &pdp->base;
 396 }
 397
 398 static int64_t
 399 driswSwapBuffers(__GLXDRIdrawable * pdraw,
 400                  int64_t target_msc, int64_t divisor, int64_t remainder)
 401 {
 402    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 403    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 404
 405    (void) target_msc;
 406    (void) divisor;
 407    (void) remainder;
 408
 409    (*psc->core->swapBuffers) (pdp->driDrawable);
 410
 411    return 0;
 412 }
 413
 414 static void
 415 driswDestroyScreen(struct glx_screen *base)
 416 {
 417    struct drisw_screen *psc = (struct drisw_screen *) base;
 418
 419    /* Free the direct rendering per screen data */
 420    (*psc->core->destroyScreen) (psc->driScreen);
 421    driDestroyConfigs(psc->driver_configs);
 422    psc->driScreen = NULL;
 423    if (psc->driver)
 424       dlclose(psc->driver);
 425 }
 426
 427 static void *
 428 driOpenSwrast(void)
 429 {
 430    void *driver = NULL;
 431
 432    if (driver == NULL)
 433       driver = driOpenDriver("swrast");
 434
 435    return driver;
 436 }
 437
 438 static const struct glx_screen_vtable drisw_screen_vtable = {
 439    drisw_create_context
 440 };
 441
 442 static struct glx_screen *
 443 driswCreateScreen(int screen, struct glx_display *priv)
 444 {
 445    __GLXDRIscreen *psp;
 446    const __DRIconfig **driver_configs;
 447    const __DRIextension **extensions;
 448    struct drisw_screen *psc;
 449    int i;
 450
 451    psc = Xcalloc(1, sizeof *psc);
 452    if (psc == NULL)
 453       return NULL;
 454
 455    memset(psc, 0, sizeof *psc);
 456    if (!glx_screen_init(&psc->base, screen, priv)) {
 457       Xfree(psc);
 458       return NULL;
 459    }
 460
 461    psc->driver = driOpenSwrast();
 462    if (psc->driver == NULL)
 463       goto handle_error;
 464
 465    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 466    if (extensions == NULL) {
 467       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 468       goto handle_error;
 469    }
 470
 471    for (i = 0; extensions[i]; i++) {
 472       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 473          psc->core = (__DRIcoreExtension *) extensions[i];
 474       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 475          psc->swrast = (__DRIswrastExtension *) extensions[i];
 476    }
 477
 478    if (psc->core == NULL || psc->swrast == NULL) {
 479       ErrorMessageF("core dri extension not found\n");
 480       goto handle_error;
 481    }
 482
 483    psc->driScreen =
 484       psc->swrast->createNewScreen(screen, loader_extensions,
 485                                    &driver_configs, psc);
 486    if (psc->driScreen == NULL) {
 487       ErrorMessageF("failed to create dri screen\n");
 488       goto handle_error;
 489    }
 490
 491    psc->base.configs =
 492       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 493    psc->base.visuals =
 494       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 495
 496    psc->driver_configs = driver_configs;
 497
 498    psc->base.vtable = &drisw_screen_vtable;
 499    psp = &psc->vtable;
 500    psc->base.driScreen = psp;
 501    psp->destroyScreen = driswDestroyScreen;
 502    psp->createDrawable = driswCreateDrawable;
 503    psp->swapBuffers = driswSwapBuffers;
 504
 505    return &psc->base;
 506
 507  handle_error:
 508    if (psc->driver)
 509       dlclose(psc->driver);
 510    glx_screen_cleanup(&psc->base);
 511    Xfree(psc);
 512
 513    ErrorMessageF("reverting to indirect rendering\n");
 514
 515    return NULL;
 516 }
 517
 518 /* Called from __glXFreeDisplayPrivate.
 519  */
 520 static void
 521 driswDestroyDisplay(__GLXDRIdisplay * dpy)
 522 {
 523    Xfree(dpy);
 524 }
 525
 526 /*
 527  * Allocate, initialize and return a __DRIdisplayPrivate object.
 528  * This is called from __glXInitialize() when we are given a new
 529  * display pointer.
 530  */
 531 _X_HIDDEN __GLXDRIdisplay *
 532 driswCreateDisplay(Display * dpy)
 533 {
 534    struct drisw_display *pdpyp;
 535
 536    pdpyp = Xmalloc(sizeof *pdpyp);
 537    if (pdpyp == NULL)
 538       return NULL;
 539
 540    pdpyp->base.destroyDisplay = driswDestroyDisplay;
 541    pdpyp->base.createScreen = driswCreateScreen;
 542
 543    return &pdpyp->base;
 544 }
 545
 546 #endif /* GLX_DIRECT_RENDERING */