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 #ifdef GLX_DIRECT_RENDERING
  25
  26 #include <X11/Xlib.h>
  27 #include "glxclient.h"
  28 #include <dlfcn.h>
  29 #include "dri_common.h"
  30
  31 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  32 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  33 typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
  34
  35 struct __GLXDRIdisplayPrivateRec
  36 {
  37    __GLXDRIdisplay base;
  38 };
  39
  40 struct __GLXDRIcontextPrivateRec
  41 {
  42    __GLXDRIcontext base;
  43    __DRIcontext *driContext;
  44    __GLXscreenConfigs *psc;
  45 };
  46
  47 struct __GLXDRIdrawablePrivateRec
  48 {
  49    __GLXDRIdrawable base;
  50
  51    GC gc;
  52    GC swapgc;
  53
  54    XVisualInfo *visinfo;
  55    XImage *ximage;
  56 };
  57
  58 /**
  59  * swrast loader functions
  60  */
  61
  62 static Bool
  63 XCreateDrawable(__GLXDRIdrawablePrivate * pdp,
  64                 Display * dpy, XID drawable, int visualid)
  65 {
  66    XGCValues gcvalues;
  67    long visMask;
  68    XVisualInfo visTemp;
  69    int num_visuals;
  70
  71    /* create GC's */
  72    pdp->gc = XCreateGC(dpy, drawable, 0, NULL);
  73    pdp->swapgc = XCreateGC(dpy, drawable, 0, NULL);
  74
  75    gcvalues.function = GXcopy;
  76    gcvalues.graphics_exposures = False;
  77    XChangeGC(dpy, pdp->gc, GCFunction, &gcvalues);
  78    XChangeGC(dpy, pdp->swapgc, GCFunction, &gcvalues);
  79    XChangeGC(dpy, pdp->swapgc, GCGraphicsExposures, &gcvalues);
  80
  81    /* create XImage  */
  82    visTemp.screen = DefaultScreen(dpy);
  83    visTemp.visualid = visualid;
  84    visMask = (VisualScreenMask | VisualIDMask);
  85    pdp->visinfo = XGetVisualInfo(dpy, visMask, &visTemp, &num_visuals);
  86
  87    pdp->ximage = XCreateImage(dpy,
  88                               pdp->visinfo->visual,
  89                               pdp->visinfo->depth,
  90                               ZPixmap, 0,             /* format, offset */
  91                               NULL,                   /* data */
  92                               0, 0,                   /* width, height */
  93                               8,                      /* bitmap_pad */
  94                               0);                     /* bytes_per_line */
  95
  96    return True;
  97 }
  98
  99 static void
 100 XDestroyDrawable(__GLXDRIdrawablePrivate * pdp, Display * dpy, XID drawable)
 101 {
 102    XDestroyImage(pdp->ximage);
 103    XFree(pdp->visinfo);
 104
 105    XFreeGC(dpy, pdp->gc);
 106    XFreeGC(dpy, pdp->swapgc);
 107 }
 108
 109 static void
 110 swrastGetDrawableInfo(__DRIdrawable * draw,
 111                       int *x, int *y, int *w, int *h,
 112                       void *loaderPrivate)
 113 {
 114    __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 115    __GLXDRIdrawable *pdraw = &(pdp->base);
 116    Display *dpy = pdraw->psc->dpy;
 117    Drawable drawable;
 118
 119    Window root;
 120    Status stat;
 121    unsigned uw, uh, bw, depth;
 122
 123    drawable = pdraw->xDrawable;
 124
 125    stat = XGetGeometry(dpy, drawable, &root,
 126                        x, y, &uw, &uh, &bw, &depth);
 127    *w = uw;
 128    *h = uh;
 129 }
 130
 131 static void
 132 swrastPutImage2(__DRIdrawable * draw, int op,
 133                 int x, int y, int w, int h,
 134                 char *data, int pitch, void *loaderPrivate)
 135 {
 136    __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 137    __GLXDRIdrawable *pdraw = &(pdp->base);
 138    Display *dpy = pdraw->psc->dpy;
 139    Drawable drawable;
 140    XImage *ximage;
 141    GC gc;
 142
 143    switch (op) {
 144    case __DRI_SWRAST_IMAGE_OP_DRAW:
 145       gc = pdp->gc;
 146       break;
 147    case __DRI_SWRAST_IMAGE_OP_SWAP:
 148       gc = pdp->swapgc;
 149       break;
 150    default:
 151       return;
 152    }
 153
 154    drawable = pdraw->xDrawable;
 155
 156    ximage = pdp->ximage;
 157    ximage->data = data;
 158    ximage->width = w;
 159    ximage->height = h;
 160    ximage->bytes_per_line = pitch;
 161
 162    XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 163
 164    ximage->data = NULL;
 165 }
 166
 167 static void
 168 swrastGetImage2(__DRIdrawable * read,
 169                 int x, int y, int w, int h,
 170                 char *data, int pitch, void *loaderPrivate)
 171 {
 172    __GLXDRIdrawablePrivate *prp = loaderPrivate;
 173    __GLXDRIdrawable *pread = &(prp->base);
 174    Display *dpy = pread->psc->dpy;
 175    Drawable readable;
 176    XImage *ximage;
 177
 178    readable = pread->xDrawable;
 179
 180    ximage = prp->ximage;
 181    ximage->data = data;
 182    ximage->width = w;
 183    ximage->height = h;
 184    ximage->bytes_per_line = pitch;
 185
 186    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 187
 188    ximage->data = NULL;
 189 }
 190
 191 static inline int
 192 bytes_per_line(unsigned pitch_bits, unsigned mul)
 193 {
 194    unsigned mask = mul - 1;
 195
 196    return ((pitch_bits + mask) & ~mask) / 8;
 197 }
 198
 199 static void
 200 swrastPutImage(__DRIdrawable * draw, int op,
 201                int x, int y, int w, int h,
 202                char *data, void *loaderPrivate)
 203 {
 204    __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 205    int bpp, pitch;
 206
 207    bpp = pdp->ximage->bits_per_pixel;
 208
 209    pitch = bytes_per_line(w * bpp, 32);
 210
 211    swrastPutImage2(draw, op, x, y, w, h, data, pitch, loaderPrivate);
 212 }
 213
 214 static void
 215 swrastGetImage(__DRIdrawable * read,
 216                int x, int y, int w, int h,
 217                char *data, void *loaderPrivate)
 218 {
 219    __GLXDRIdrawablePrivate *prp = loaderPrivate;
 220    int bpp, pitch;
 221
 222    bpp = prp->ximage->bits_per_pixel;
 223
 224    pitch = bytes_per_line(w * bpp, 32);
 225
 226    swrastGetImage2(read, x, y, w, h, data, pitch, loaderPrivate);
 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 driDestroyContext(__GLXDRIcontext * context,
 248                   __GLXscreenConfigs * psc, Display * dpy)
 249 {
 250    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 251    const __DRIcoreExtension *core = pcp->psc->core;
 252
 253    (*core->destroyContext) (pcp->driContext);
 254
 255    Xfree(pcp);
 256 }
 257
 258 static Bool
 259 driBindContext(__GLXDRIcontext * context,
 260                __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 261 {
 262    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 263    const __DRIcoreExtension *core = pcp->psc->core;
 264
 265    return (*core->bindContext) (pcp->driContext,
 266                                 draw->driDrawable, read->driDrawable);
 267 }
 268
 269 static void
 270 driUnbindContext(__GLXDRIcontext * context)
 271 {
 272    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 273    const __DRIcoreExtension *core = pcp->psc->core;
 274
 275    (*core->unbindContext) (pcp->driContext);
 276 }
 277
 278 static __GLXDRIcontext *
 279 driCreateContext(__GLXscreenConfigs * psc,
 280                  const __GLcontextModes * mode,
 281                  GLXContext gc, GLXContext shareList, int renderType)
 282 {
 283    __GLXDRIcontextPrivate *pcp, *pcp_shared;
 284    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 285    const __DRIcoreExtension *core;
 286    __DRIcontext *shared = NULL;
 287
 288    if (!psc || !psc->driScreen)
 289       return NULL;
 290
 291    core = psc->core;
 292
 293    if (shareList) {
 294       pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 295       shared = pcp_shared->driContext;
 296    }
 297
 298    pcp = Xmalloc(sizeof *pcp);
 299    if (pcp == NULL)
 300       return NULL;
 301
 302    pcp->psc = psc;
 303    pcp->driContext =
 304       (*core->createNewContext) (psc->__driScreen,
 305                                  config->driConfig, shared, pcp);
 306    if (pcp->driContext == NULL) {
 307       Xfree(pcp);
 308       return NULL;
 309    }
 310
 311    pcp->base.destroyContext = driDestroyContext;
 312    pcp->base.bindContext = driBindContext;
 313    pcp->base.unbindContext = driUnbindContext;
 314
 315    return &pcp->base;
 316 }
 317
 318 static void
 319 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 320 {
 321    __GLXDRIdrawablePrivate *pdp = (__GLXDRIdrawablePrivate *) pdraw;
 322    const __DRIcoreExtension *core = pdraw->psc->core;
 323
 324    (*core->destroyDrawable) (pdraw->driDrawable);
 325
 326    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 327    Xfree(pdp);
 328 }
 329
 330 static __GLXDRIdrawable *
 331 driCreateDrawable(__GLXscreenConfigs * psc,
 332                   XID xDrawable,
 333                   GLXDrawable drawable, const __GLcontextModes * modes)
 334 {
 335    __GLXDRIdrawable *pdraw;
 336    __GLXDRIdrawablePrivate *pdp;
 337    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 338    const __DRIswrastExtension *swrast = psc->swrast;
 339
 340    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 341    if (xDrawable != drawable)
 342       return NULL;
 343
 344    pdp = Xmalloc(sizeof(*pdp));
 345    if (!pdp)
 346       return NULL;
 347
 348    pdraw = &(pdp->base);
 349    pdraw->xDrawable = xDrawable;
 350    pdraw->drawable = drawable;
 351    pdraw->psc = psc;
 352
 353    XCreateDrawable(pdp, psc->dpy, xDrawable, modes->visualID);
 354
 355    /* Create a new drawable */
 356    pdraw->driDrawable =
 357       (*swrast->createNewDrawable) (psc->__driScreen, config->driConfig, pdp);
 358
 359    if (!pdraw->driDrawable) {
 360       XDestroyDrawable(pdp, psc->dpy, xDrawable);
 361       Xfree(pdp);
 362       return NULL;
 363    }
 364
 365    pdraw->destroyDrawable = driDestroyDrawable;
 366
 367    return pdraw;
 368 }
 369
 370 static int64_t
 371 driSwapBuffers(__GLXDRIdrawable * pdraw,
 372                int64_t target_msc, int64_t divisor, int64_t remainder)
 373 {
 374    (void) target_msc;
 375    (void) divisor;
 376    (void) remainder;
 377
 378    (*pdraw->psc->core->swapBuffers) (pdraw->driDrawable);
 379
 380    return 0;
 381 }
 382
 383 static void
 384 driDestroyScreen(__GLXscreenConfigs * psc)
 385 {
 386    /* Free the direct rendering per screen data */
 387    (*psc->core->destroyScreen) (psc->__driScreen);
 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 __GLXDRIscreen *
 408 driCreateScreen(__GLXscreenConfigs * psc, int screen,
 409                 __GLXdisplayPrivate * priv)
 410 {
 411    __GLXDRIscreen *psp;
 412    const __DRIconfig **driver_configs;
 413    const __DRIextension **extensions;
 414    int i;
 415
 416    psp = Xcalloc(1, sizeof *psp);
 417    if (psp == NULL)
 418       return NULL;
 419
 420    psc->driver = driOpenSwrast();
 421    if (psc->driver == NULL)
 422       goto handle_error;
 423
 424    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 425    if (extensions == NULL) {
 426       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 427       goto handle_error;
 428    }
 429
 430    for (i = 0; extensions[i]; i++) {
 431       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 432          psc->core = (__DRIcoreExtension *) extensions[i];
 433       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 434          psc->swrast = (__DRIswrastExtension *) extensions[i];
 435    }
 436
 437    if (psc->core == NULL || psc->swrast == NULL) {
 438       ErrorMessageF("core dri extension not found\n");
 439       goto handle_error;
 440    }
 441
 442    psc->__driScreen =
 443       psc->swrast->createNewScreen(screen,
 444                                    loader_extensions, &driver_configs, psc);
 445    if (psc->__driScreen == NULL) {
 446       ErrorMessageF("failed to create dri screen\n");
 447       goto handle_error;
 448    }
 449
 450    driBindExtensions(psc);
 451    driBindCommonExtensions(psc);
 452
 453    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 454    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 455
 456    psc->driver_configs = driver_configs;
 457
 458    psp->destroyScreen = driDestroyScreen;
 459    psp->createContext = driCreateContext;
 460    psp->createDrawable = driCreateDrawable;
 461    psp->swapBuffers = driSwapBuffers;
 462    psp->waitX = NULL;
 463    psp->waitGL = NULL;
 464
 465    return psp;
 466
 467  handle_error:
 468    Xfree(psp);
 469
 470    if (psc->driver)
 471       dlclose(psc->driver);
 472
 473    ErrorMessageF("reverting to indirect rendering\n");
 474
 475    return NULL;
 476 }
 477
 478 /* Called from __glXFreeDisplayPrivate.
 479  */
 480 static void
 481 driDestroyDisplay(__GLXDRIdisplay * dpy)
 482 {
 483    Xfree(dpy);
 484 }
 485
 486 /*
 487  * Allocate, initialize and return a __DRIdisplayPrivate object.
 488  * This is called from __glXInitialize() when we are given a new
 489  * display pointer.
 490  */
 491 _X_HIDDEN __GLXDRIdisplay *
 492 driswCreateDisplay(Display * dpy)
 493 {
 494    __GLXDRIdisplayPrivate *pdpyp;
 495
 496    pdpyp = Xmalloc(sizeof *pdpyp);
 497    if (pdpyp == NULL)
 498       return NULL;
 499
 500    pdpyp->base.destroyDisplay = driDestroyDisplay;
 501    pdpyp->base.createScreen = driCreateScreen;
 502
 503    return &pdpyp->base;
 504 }
 505
 506 #endif /* GLX_DIRECT_RENDERING */