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    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    Status stat;
 132    unsigned uw, uh, bw, depth;
 133
 134    drawable = pdraw->xDrawable;
 135
 136    stat = XGetGeometry(dpy, drawable, &root,
 137                        x, y, &uw, &uh, &bw, &depth);
 138    *w = uw;
 139    *h = uh;
 140 }
 141
 142 /**
 143  * Align renderbuffer pitch.
 144  *
 145  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 146  * should use the driver provided pitch.
 147  *
 148  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 149  * indirect rendering, not client-side libGL) requires that the pitch is
 150  * exactly the image width padded to 32 bits. XXX
 151  *
 152  * The above restriction can probably be overcome by using ScratchPixmap and
 153  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 154  * the scratch pixmap to 'pitch / cpp'.
 155  */
 156 static inline int
 157 bytes_per_line(unsigned pitch_bits, unsigned mul)
 158 {
 159    unsigned mask = mul - 1;
 160
 161    return ((pitch_bits + mask) & ~mask) / 8;
 162 }
 163
 164 static void
 165 swrastPutImage(__DRIdrawable * draw, int op,
 166                int x, int y, int w, int h,
 167                char *data, void *loaderPrivate)
 168 {
 169    struct drisw_drawable *pdp = loaderPrivate;
 170    __GLXDRIdrawable *pdraw = &(pdp->base);
 171    Display *dpy = pdraw->psc->dpy;
 172    Drawable drawable;
 173    XImage *ximage;
 174    GC gc;
 175
 176    switch (op) {
 177    case __DRI_SWRAST_IMAGE_OP_DRAW:
 178       gc = pdp->gc;
 179       break;
 180    case __DRI_SWRAST_IMAGE_OP_SWAP:
 181       gc = pdp->swapgc;
 182       break;
 183    default:
 184       return;
 185    }
 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 * ximage->bits_per_pixel, 32);
 194
 195    XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 196
 197    ximage->data = NULL;
 198 }
 199
 200 static void
 201 swrastGetImage(__DRIdrawable * read,
 202                int x, int y, int w, int h,
 203                char *data, void *loaderPrivate)
 204 {
 205    struct drisw_drawable *prp = loaderPrivate;
 206    __GLXDRIdrawable *pread = &(prp->base);
 207    Display *dpy = pread->psc->dpy;
 208    Drawable readable;
 209    XImage *ximage;
 210
 211    readable = pread->xDrawable;
 212
 213    ximage = prp->ximage;
 214    ximage->data = data;
 215    ximage->width = w;
 216    ximage->height = h;
 217    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 218
 219    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 220
 221    ximage->data = NULL;
 222 }
 223
 224 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 225    {__DRI_SWRAST_LOADER, __DRI_SWRAST_LOADER_VERSION},
 226    swrastGetDrawableInfo,
 227    swrastPutImage,
 228    swrastGetImage
 229 };
 230
 231 static const __DRIextension *loader_extensions[] = {
 232    &systemTimeExtension.base,
 233    &swrastLoaderExtension.base,
 234    NULL
 235 };
 236
 237 /**
 238  * GLXDRI functions
 239  */
 240
 241 static void
 242 driDestroyContext(__GLXDRIcontext *context,
 243                   __GLXscreenConfigs *base, Display *dpy)
 244 {
 245    struct drisw_context *pcp = (struct drisw_context *) context;
 246    struct drisw_screen *psc = (struct drisw_screen *) base;
 247
 248    (*psc->core->destroyContext) (pcp->driContext);
 249
 250    Xfree(pcp);
 251 }
 252
 253 static Bool
 254 driBindContext(__GLXDRIcontext * context,
 255                __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 256 {
 257    struct drisw_context *pcp = (struct drisw_context *) context;
 258    struct drisw_screen *psc = (struct drisw_screen *) pcp->psc;
 259    struct drisw_drawable *pdr = (struct drisw_drawable *) draw;
 260    struct drisw_drawable *prd = (struct drisw_drawable *) read;
 261
 262    return (*psc->core->bindContext) (pcp->driContext,
 263                                      pdr->driDrawable, prd->driDrawable);
 264 }
 265
 266 static void
 267 driUnbindContext(__GLXDRIcontext * context)
 268 {
 269    struct drisw_context *pcp = (struct drisw_context *) context;
 270    struct drisw_screen *psc = (struct drisw_screen *) pcp->psc;
 271
 272    (*psc->core->unbindContext) (pcp->driContext);
 273 }
 274
 275 static __GLXDRIcontext *
 276 driCreateContext(__GLXscreenConfigs *base,
 277                  const __GLcontextModes *mode,
 278                  GLXContext gc, GLXContext shareList, int renderType)
 279 {
 280    struct drisw_context *pcp, *pcp_shared;
 281    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 282    struct drisw_screen *psc = (struct drisw_screen *) base;
 283    __DRIcontext *shared = NULL;
 284
 285    if (!psc->base.driScreen)
 286       return NULL;
 287
 288    if (shareList) {
 289       pcp_shared = (struct drisw_context *) shareList->driContext;
 290       shared = pcp_shared->driContext;
 291    }
 292
 293    pcp = Xmalloc(sizeof *pcp);
 294    if (pcp == NULL)
 295       return NULL;
 296
 297    pcp->psc = &psc->base;
 298    pcp->driContext =
 299       (*psc->core->createNewContext) (psc->driScreen,
 300                                       config->driConfig, shared, pcp);
 301    if (pcp->driContext == NULL) {
 302       Xfree(pcp);
 303       return NULL;
 304    }
 305
 306    pcp->base.destroyContext = driDestroyContext;
 307    pcp->base.bindContext = driBindContext;
 308    pcp->base.unbindContext = driUnbindContext;
 309
 310    return &pcp->base;
 311 }
 312
 313 static void
 314 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 315 {
 316    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 317    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 318
 319    (*psc->core->destroyDrawable) (pdp->driDrawable);
 320
 321    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 322    Xfree(pdp);
 323 }
 324
 325 static __GLXDRIdrawable *
 326 driCreateDrawable(__GLXscreenConfigs *base, XID xDrawable,
 327                   GLXDrawable drawable, const __GLcontextModes * modes)
 328 {
 329    struct drisw_drawable *pdp;
 330    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 331    struct drisw_screen *psc = (struct drisw_screen *) base;
 332
 333    const __DRIswrastExtension *swrast = psc->swrast;
 334
 335    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 336    if (xDrawable != drawable)
 337       return NULL;
 338
 339    pdp = Xmalloc(sizeof(*pdp));
 340    if (!pdp)
 341       return NULL;
 342
 343    pdp->base.xDrawable = xDrawable;
 344    pdp->base.drawable = drawable;
 345    pdp->base.psc = &psc->base;
 346
 347    XCreateDrawable(pdp, psc->base.dpy, xDrawable, modes->visualID);
 348
 349    /* Create a new drawable */
 350    pdp->driDrawable =
 351       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 352
 353    if (!pdp->driDrawable) {
 354       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 355       Xfree(pdp);
 356       return NULL;
 357    }
 358
 359    pdp->base.destroyDrawable = driDestroyDrawable;
 360
 361    return &pdp->base;
 362 }
 363
 364 static int64_t
 365 driSwapBuffers(__GLXDRIdrawable * pdraw,
 366                int64_t target_msc, int64_t divisor, int64_t remainder)
 367 {
 368    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 369    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 370
 371    (void) target_msc;
 372    (void) divisor;
 373    (void) remainder;
 374
 375    (*psc->core->swapBuffers) (pdp->driDrawable);
 376
 377    return 0;
 378 }
 379
 380 static void
 381 driDestroyScreen(__GLXscreenConfigs *base)
 382 {
 383    struct drisw_screen *psc = (struct drisw_screen *) base;
 384
 385    /* Free the direct rendering per screen data */
 386    (*psc->core->destroyScreen) (psc->driScreen);
 387    driDestroyConfigs(psc->driver_configs);
 388    psc->driScreen = NULL;
 389    if (psc->driver)
 390       dlclose(psc->driver);
 391 }
 392
 393 static void *
 394 driOpenSwrast(void)
 395 {
 396    void *driver = NULL;
 397
 398    if (driver == NULL)
 399       driver = driOpenDriver("swrast");
 400
 401    if (driver == NULL)
 402       driver = driOpenDriver("swrastg");
 403
 404    return driver;
 405 }
 406
 407 static __GLXscreenConfigs *
 408 driCreateScreen(int screen, __GLXdisplayPrivate *priv)
 409 {
 410    __GLXDRIscreen *psp;
 411    const __DRIconfig **driver_configs;
 412    const __DRIextension **extensions;
 413    struct drisw_screen *psc;
 414    int i;
 415
 416    psc = Xcalloc(1, sizeof *psc);
 417    if (psc == NULL)
 418       return NULL;
 419
 420    memset(psc, 0, sizeof *psc);
 421    if (!glx_screen_init(&psc->base, screen, priv))
 422        return NULL;
 423
 424    psc->driver = driOpenSwrast();
 425    if (psc->driver == NULL)
 426       goto handle_error;
 427
 428    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 429    if (extensions == NULL) {
 430       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 431       goto handle_error;
 432    }
 433
 434    for (i = 0; extensions[i]; i++) {
 435       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 436          psc->core = (__DRIcoreExtension *) extensions[i];
 437       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 438          psc->swrast = (__DRIswrastExtension *) extensions[i];
 439    }
 440
 441    if (psc->core == NULL || psc->swrast == NULL) {
 442       ErrorMessageF("core dri extension not found\n");
 443       goto handle_error;
 444    }
 445
 446    psc->driScreen =
 447       psc->swrast->createNewScreen(screen, loader_extensions,
 448                                    &driver_configs, psc);
 449    if (psc->driScreen == NULL) {
 450       ErrorMessageF("failed to create dri screen\n");
 451       goto handle_error;
 452    }
 453
 454    extensions = psc->core->getExtensions(psc->driScreen);
 455    driBindCommonExtensions(&psc->base, extensions);
 456
 457    psc->base.configs =
 458       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 459    psc->base.visuals =
 460       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 461
 462    psc->driver_configs = driver_configs;
 463
 464    psp = &psc->vtable;
 465    psc->base.driScreen = psp;
 466    psp->destroyScreen = driDestroyScreen;
 467    psp->createContext = driCreateContext;
 468    psp->createDrawable = driCreateDrawable;
 469    psp->swapBuffers = driSwapBuffers;
 470    psp->waitX = NULL;
 471    psp->waitGL = NULL;
 472
 473    return &psc->base;
 474
 475  handle_error:
 476    Xfree(psc);
 477
 478    if (psc->driver)
 479       dlclose(psc->driver);
 480
 481    ErrorMessageF("reverting to indirect rendering\n");
 482
 483    return NULL;
 484 }
 485
 486 /* Called from __glXFreeDisplayPrivate.
 487  */
 488 static void
 489 driDestroyDisplay(__GLXDRIdisplay * dpy)
 490 {
 491    Xfree(dpy);
 492 }
 493
 494 /*
 495  * Allocate, initialize and return a __DRIdisplayPrivate object.
 496  * This is called from __glXInitialize() when we are given a new
 497  * display pointer.
 498  */
 499 _X_HIDDEN __GLXDRIdisplay *
 500 driswCreateDisplay(Display * dpy)
 501 {
 502    struct drisw_display *pdpyp;
 503
 504    pdpyp = Xmalloc(sizeof *pdpyp);
 505    if (pdpyp == NULL)
 506       return NULL;
 507
 508    pdpyp->base.destroyDisplay = driDestroyDisplay;
 509    pdpyp->base.createScreen = driCreateScreen;
 510
 511    return &pdpyp->base;
 512 }
 513
 514 #endif /* GLX_DIRECT_RENDERING */