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