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    __GLXDRIcontext base;
  39    __DRIcontext *driContext;
  40    __GLXscreenConfigs *psc;
  41 };
  42
  43 struct drisw_screen
  44 {
  45    __GLXscreenConfigs base;
  46
  47    __DRIscreen *driScreen;
  48    __GLXDRIscreen vtable;
  49    const __DRIcoreExtension *core;
  50    const __DRIswrastExtension *swrast;
  51    void *driver;
  52 };
  53
  54 struct drisw_drawable
  55 {
  56    __GLXDRIdrawable base;
  57
  58    GC gc;
  59    GC swapgc;
  60
  61    XVisualInfo *visinfo;
  62    XImage *ximage;
  63 };
  64
  65 static Bool
  66 XCreateDrawable(struct drisw_drawable * pdp,
  67                 Display * dpy, XID drawable, int visualid)
  68 {
  69    XGCValues gcvalues;
  70    long visMask;
  71    XVisualInfo visTemp;
  72    int num_visuals;
  73
  74    /* create GC's */
  75    pdp->gc = XCreateGC(dpy, drawable, 0, NULL);
  76    pdp->swapgc = XCreateGC(dpy, drawable, 0, NULL);
  77
  78    gcvalues.function = GXcopy;
  79    gcvalues.graphics_exposures = False;
  80    XChangeGC(dpy, pdp->gc, GCFunction, &gcvalues);
  81    XChangeGC(dpy, pdp->swapgc, GCFunction, &gcvalues);
  82    XChangeGC(dpy, pdp->swapgc, GCGraphicsExposures, &gcvalues);
  83
  84    /* visual */
  85    visTemp.screen = DefaultScreen(dpy);
  86    visTemp.visualid = visualid;
  87    visMask = (VisualScreenMask | VisualIDMask);
  88    pdp->visinfo = XGetVisualInfo(dpy, visMask, &visTemp, &num_visuals);
  89
  90    /* create XImage */
  91    pdp->ximage = XCreateImage(dpy,
  92                               pdp->visinfo->visual,
  93                               pdp->visinfo->depth,
  94                               ZPixmap, 0,             /* format, offset */
  95                               NULL,                   /* data */
  96                               0, 0,                   /* width, height */
  97                               32,                     /* bitmap_pad */
  98                               0);                     /* bytes_per_line */
  99
 100    return True;
 101 }
 102
 103 static void
 104 XDestroyDrawable(struct drisw_drawable * pdp, Display * dpy, XID drawable)
 105 {
 106    XDestroyImage(pdp->ximage);
 107    XFree(pdp->visinfo);
 108
 109    XFreeGC(dpy, pdp->gc);
 110    XFreeGC(dpy, pdp->swapgc);
 111 }
 112
 113 /**
 114  * swrast loader functions
 115  */
 116
 117 static void
 118 swrastGetDrawableInfo(__DRIdrawable * draw,
 119                       int *x, int *y, int *w, int *h,
 120                       void *loaderPrivate)
 121 {
 122    struct drisw_drawable *pdp = loaderPrivate;
 123    __GLXDRIdrawable *pdraw = &(pdp->base);
 124    Display *dpy = pdraw->psc->dpy;
 125    Drawable drawable;
 126
 127    Window root;
 128    Status stat;
 129    unsigned uw, uh, bw, depth;
 130
 131    drawable = pdraw->xDrawable;
 132
 133    stat = XGetGeometry(dpy, drawable, &root,
 134                        x, y, &uw, &uh, &bw, &depth);
 135    *w = uw;
 136    *h = uh;
 137 }
 138
 139 /**
 140  * Align renderbuffer pitch.
 141  *
 142  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 143  * should use the driver provided pitch.
 144  *
 145  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 146  * indirect rendering, not client-side libGL) requires that the pitch is
 147  * exactly the image width padded to 32 bits. XXX
 148  *
 149  * The above restriction can probably be overcome by using ScratchPixmap and
 150  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 151  * the scratch pixmap to 'pitch / cpp'.
 152  */
 153 static inline int
 154 bytes_per_line(unsigned pitch_bits, unsigned mul)
 155 {
 156    unsigned mask = mul - 1;
 157
 158    return ((pitch_bits + mask) & ~mask) / 8;
 159 }
 160
 161 static void
 162 swrastPutImage(__DRIdrawable * draw, int op,
 163                int x, int y, int w, int h,
 164                char *data, void *loaderPrivate)
 165 {
 166    struct drisw_drawable *pdp = loaderPrivate;
 167    __GLXDRIdrawable *pdraw = &(pdp->base);
 168    Display *dpy = pdraw->psc->dpy;
 169    Drawable drawable;
 170    XImage *ximage;
 171    GC gc;
 172
 173    switch (op) {
 174    case __DRI_SWRAST_IMAGE_OP_DRAW:
 175       gc = pdp->gc;
 176       break;
 177    case __DRI_SWRAST_IMAGE_OP_SWAP:
 178       gc = pdp->swapgc;
 179       break;
 180    default:
 181       return;
 182    }
 183
 184    drawable = pdraw->xDrawable;
 185
 186    ximage = pdp->ximage;
 187    ximage->data = data;
 188    ximage->width = w;
 189    ximage->height = h;
 190    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 191
 192    XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 193
 194    ximage->data = NULL;
 195 }
 196
 197 static void
 198 swrastGetImage(__DRIdrawable * read,
 199                int x, int y, int w, int h,
 200                char *data, void *loaderPrivate)
 201 {
 202    struct drisw_drawable *prp = loaderPrivate;
 203    __GLXDRIdrawable *pread = &(prp->base);
 204    Display *dpy = pread->psc->dpy;
 205    Drawable readable;
 206    XImage *ximage;
 207
 208    readable = pread->xDrawable;
 209
 210    ximage = prp->ximage;
 211    ximage->data = data;
 212    ximage->width = w;
 213    ximage->height = h;
 214    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 215
 216    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 217
 218    ximage->data = NULL;
 219 }
 220
 221 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 222    {__DRI_SWRAST_LOADER, __DRI_SWRAST_LOADER_VERSION},
 223    swrastGetDrawableInfo,
 224    swrastPutImage,
 225    swrastGetImage
 226 };
 227
 228 static const __DRIextension *loader_extensions[] = {
 229    &systemTimeExtension.base,
 230    &swrastLoaderExtension.base,
 231    NULL
 232 };
 233
 234 /**
 235  * GLXDRI functions
 236  */
 237
 238 static void
 239 driDestroyContext(__GLXDRIcontext *context,
 240                   __GLXscreenConfigs *base, Display *dpy)
 241 {
 242    struct drisw_context *pcp = (struct drisw_context *) context;
 243    struct drisw_screen *psc = (struct drisw_screen *) base;
 244
 245    (*psc->core->destroyContext) (pcp->driContext);
 246
 247    Xfree(pcp);
 248 }
 249
 250 static Bool
 251 driBindContext(__GLXDRIcontext * context,
 252                __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 253 {
 254    struct drisw_context *pcp = (struct drisw_context *) context;
 255    struct drisw_screen *psc = (struct drisw_screen *) pcp->psc;
 256
 257    return (*psc->core->bindContext) (pcp->driContext,
 258                                      draw->driDrawable, read->driDrawable);
 259 }
 260
 261 static void
 262 driUnbindContext(__GLXDRIcontext * context)
 263 {
 264    struct drisw_context *pcp = (struct drisw_context *) context;
 265    struct drisw_screen *psc = (struct drisw_screen *) pcp->psc;
 266
 267    (*psc->core->unbindContext) (pcp->driContext);
 268 }
 269
 270 static __GLXDRIcontext *
 271 driCreateContext(__GLXscreenConfigs *base,
 272                  const __GLcontextModes *mode,
 273                  GLXContext gc, GLXContext shareList, int renderType)
 274 {
 275    struct drisw_context *pcp, *pcp_shared;
 276    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 277    struct drisw_screen *psc = (struct drisw_screen *) base;
 278    __DRIcontext *shared = NULL;
 279
 280    if (!psc->base.driScreen)
 281       return NULL;
 282
 283    if (shareList) {
 284       pcp_shared = (struct drisw_context *) shareList->driContext;
 285       shared = pcp_shared->driContext;
 286    }
 287
 288    pcp = Xmalloc(sizeof *pcp);
 289    if (pcp == NULL)
 290       return NULL;
 291
 292    pcp->psc = &psc->base;
 293    pcp->driContext =
 294       (*psc->core->createNewContext) (psc->driScreen,
 295                                       config->driConfig, shared, pcp);
 296    if (pcp->driContext == NULL) {
 297       Xfree(pcp);
 298       return NULL;
 299    }
 300
 301    pcp->base.destroyContext = driDestroyContext;
 302    pcp->base.bindContext = driBindContext;
 303    pcp->base.unbindContext = driUnbindContext;
 304
 305    return &pcp->base;
 306 }
 307
 308 static void
 309 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 310 {
 311    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 312    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 313
 314    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 315
 316    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 317    Xfree(pdp);
 318 }
 319
 320 static __GLXDRIdrawable *
 321 driCreateDrawable(__GLXscreenConfigs *base, XID xDrawable,
 322                   GLXDrawable drawable, const __GLcontextModes * modes)
 323 {
 324    __GLXDRIdrawable *pdraw;
 325    struct drisw_drawable *pdp;
 326    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 327    struct drisw_screen *psc = (struct drisw_screen *) base;
 328
 329    const __DRIswrastExtension *swrast = psc->swrast;
 330
 331    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 332    if (xDrawable != drawable)
 333       return NULL;
 334
 335    pdp = Xmalloc(sizeof(*pdp));
 336    if (!pdp)
 337       return NULL;
 338
 339    pdraw = &(pdp->base);
 340    pdraw->xDrawable = xDrawable;
 341    pdraw->drawable = drawable;
 342    pdraw->psc = &psc->base;
 343
 344    XCreateDrawable(pdp, psc->base.dpy, xDrawable, modes->visualID);
 345
 346    /* Create a new drawable */
 347    pdraw->driDrawable =
 348       (*swrast->createNewDrawable) (psc->driScreen,
 349                                     config->driConfig, pdp);
 350
 351    if (!pdraw->driDrawable) {
 352       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 353       Xfree(pdp);
 354       return NULL;
 355    }
 356
 357    pdraw->destroyDrawable = driDestroyDrawable;
 358
 359    return pdraw;
 360 }
 361
 362 static int64_t
 363 driSwapBuffers(__GLXDRIdrawable * pdraw,
 364                int64_t target_msc, int64_t divisor, int64_t remainder)
 365 {
 366    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 367    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 368
 369    (void) target_msc;
 370    (void) divisor;
 371    (void) remainder;
 372
 373    (*psc->core->swapBuffers) (pdraw->driDrawable);
 374
 375    return 0;
 376 }
 377
 378 static void
 379 driDestroyScreen(__GLXscreenConfigs *base)
 380 {
 381    struct drisw_screen *psc = (struct drisw_screen *) base;
 382
 383    /* Free the direct rendering per screen data */
 384    (*psc->core->destroyScreen) (psc->driScreen);
 385    psc->driScreen = NULL;
 386    if (psc->driver)
 387       dlclose(psc->driver);
 388 }
 389
 390 static void *
 391 driOpenSwrast(void)
 392 {
 393    void *driver = NULL;
 394
 395    if (driver == NULL)
 396       driver = driOpenDriver("swrast");
 397
 398    if (driver == NULL)
 399       driver = driOpenDriver("swrastg");
 400
 401    return driver;
 402 }
 403
 404 static __GLXscreenConfigs *
 405 driCreateScreen(int screen, __GLXdisplayPrivate *priv)
 406 {
 407    __GLXDRIscreen *psp;
 408    const __DRIconfig **driver_configs;
 409    const __DRIextension **extensions;
 410    struct drisw_screen *psc;
 411    int i;
 412
 413    psc = Xcalloc(1, sizeof *psc);
 414    if (psc == NULL)
 415       return NULL;
 416
 417    memset(psc, 0, sizeof *psc);
 418    if (!glx_screen_init(&psc->base, screen, priv))
 419        return NULL;
 420
 421    psc->driver = driOpenSwrast();
 422    if (psc->driver == NULL)
 423       goto handle_error;
 424
 425    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 426    if (extensions == NULL) {
 427       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 428       goto handle_error;
 429    }
 430
 431    for (i = 0; extensions[i]; i++) {
 432       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 433          psc->core = (__DRIcoreExtension *) extensions[i];
 434       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 435          psc->swrast = (__DRIswrastExtension *) extensions[i];
 436    }
 437
 438    if (psc->core == NULL || psc->swrast == NULL) {
 439       ErrorMessageF("core dri extension not found\n");
 440       goto handle_error;
 441    }
 442
 443    psc->driScreen =
 444       psc->swrast->createNewScreen(screen, loader_extensions,
 445                                    &driver_configs, psc);
 446    if (psc->driScreen == NULL) {
 447       ErrorMessageF("failed to create dri screen\n");
 448       goto handle_error;
 449    }
 450
 451    extensions = psc->core->getExtensions(psc->driScreen);
 452    driBindCommonExtensions(&psc->base, extensions);
 453
 454    psc->base.configs =
 455       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 456    psc->base.visuals =
 457       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 458
 459    psc->base.driver_configs = driver_configs;
 460
 461    psp = &psc->vtable;
 462    psc->base.driScreen = psp;
 463    psp->destroyScreen = driDestroyScreen;
 464    psp->createContext = driCreateContext;
 465    psp->createDrawable = driCreateDrawable;
 466    psp->swapBuffers = driSwapBuffers;
 467    psp->waitX = NULL;
 468    psp->waitGL = NULL;
 469
 470    return &psc->base;
 471
 472  handle_error:
 473    Xfree(psc);
 474
 475    if (psc->driver)
 476       dlclose(psc->driver);
 477
 478    ErrorMessageF("reverting to indirect rendering\n");
 479
 480    return NULL;
 481 }
 482
 483 /* Called from __glXFreeDisplayPrivate.
 484  */
 485 static void
 486 driDestroyDisplay(__GLXDRIdisplay * dpy)
 487 {
 488    Xfree(dpy);
 489 }
 490
 491 /*
 492  * Allocate, initialize and return a __DRIdisplayPrivate object.
 493  * This is called from __glXInitialize() when we are given a new
 494  * display pointer.
 495  */
 496 _X_HIDDEN __GLXDRIdisplay *
 497 driswCreateDisplay(Display * dpy)
 498 {
 499    struct drisw_display *pdpyp;
 500
 501    pdpyp = Xmalloc(sizeof *pdpyp);
 502    if (pdpyp == NULL)
 503       return NULL;
 504
 505    pdpyp->base.destroyDisplay = driDestroyDisplay;
 506    pdpyp->base.createScreen = driCreateScreen;
 507
 508    return &pdpyp->base;
 509 }
 510
 511 #endif /* GLX_DIRECT_RENDERING */