src/glx/x11/drisw_glx.c

   1 /* -*- mode: c; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3; coding: utf-8-unix -*- */
   2 /*
   3  * Copyright 2008 George Sapountzis
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #ifdef GLX_DIRECT_RENDERING
  26
  27 #include <X11/Xlib.h>
  28 #include "glxclient.h"
  29 #include "glcontextmodes.h"
  30 #include <dlfcn.h>
  31 #include "dri_common.h"
  32
  33 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  34 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  35 typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
  36
  37 struct __GLXDRIdisplayPrivateRec
  38 {
  39    __GLXDRIdisplay base;
  40 };
  41
  42 struct __GLXDRIcontextPrivateRec
  43 {
  44    __GLXDRIcontext base;
  45    __DRIcontext *driContext;
  46    __GLXscreenConfigs *psc;
  47 };
  48
  49 struct __GLXDRIdrawablePrivateRec
  50 {
  51    __GLXDRIdrawable base;
  52
  53    GC gc;
  54    GC swapgc;
  55
  56    XVisualInfo *visinfo;
  57    XImage *ximage;
  58    int bpp;
  59 };
  60
  61 /**
  62  * swrast loader functions
  63  */
  64
  65 static Bool
  66 XCreateDrawable(__GLXDRIdrawablePrivate * 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    /* create XImage  */
  85    visTemp.screen = DefaultScreen(dpy);
  86    visTemp.visualid = visualid;
  87    visMask = (VisualScreenMask | VisualIDMask);
  88    pdp->visinfo = XGetVisualInfo(dpy, visMask, &visTemp, &num_visuals);
  89
  90    pdp->ximage = XCreateImage(dpy, pdp->visinfo->visual, pdp->visinfo->depth, ZPixmap, 0,       /* format, offset */
  91                               NULL,     /* data */
  92                               0, 0,     /* size */
  93                               32,       /* bitmap_pad */
  94                               0);       /* bytes_per_line */
  95
  96    /* get the true number of bits per pixel */
  97    pdp->bpp = pdp->ximage->bits_per_pixel;
  98
  99    return True;
 100 }
 101
 102 static void
 103 XDestroyDrawable(__GLXDRIdrawablePrivate * 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 static void
 113 swrastGetDrawableInfo(__DRIdrawable * draw,
 114                       int *x, int *y, int *w, int *h, void *loaderPrivate)
 115 {
 116    __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 117    __GLXDRIdrawable *pdraw = &(pdp->base);;
 118    Display *dpy = pdraw->psc->dpy;
 119    Drawable drawable;
 120
 121    Window root;
 122    Status stat;
 123    unsigned int bw, depth;
 124
 125    drawable = pdraw->xDrawable;
 126
 127    stat = XGetGeometry(dpy, drawable, &root,
 128                        x, y, (unsigned int *) w, (unsigned int *) h,
 129                        &bw, &depth);
 130 }
 131
 132 static inline int
 133 bytes_per_line(int w, int bpp, unsigned mul)
 134 {
 135    unsigned mask = mul - 1;
 136
 137    return ((w * bpp + mask) & ~mask) / 8;
 138 }
 139
 140 static void
 141 swrastPutImage(__DRIdrawable * draw, int op,
 142                int x, int y, int w, int h, char *data, void *loaderPrivate)
 143 {
 144    __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 145    __GLXDRIdrawable *pdraw = &(pdp->base);;
 146    Display *dpy = pdraw->psc->dpy;
 147    Drawable drawable;
 148    XImage *ximage;
 149    GC gc;
 150
 151    switch (op) {
 152    case __DRI_SWRAST_IMAGE_OP_DRAW:
 153       gc = pdp->gc;
 154       break;
 155    case __DRI_SWRAST_IMAGE_OP_SWAP:
 156       gc = pdp->swapgc;
 157       break;
 158    default:
 159       return;
 160    }
 161
 162    drawable = pdraw->xDrawable;
 163
 164    ximage = pdp->ximage;
 165    ximage->data = data;
 166    ximage->width = w;
 167    ximage->height = h;
 168    ximage->bytes_per_line = bytes_per_line(w, pdp->bpp, 32);
 169
 170    XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 171
 172    ximage->data = NULL;
 173 }
 174
 175 static void
 176 swrastGetImage(__DRIdrawable * draw,
 177                int x, int y, int w, int h, char *data, void *loaderPrivate)
 178 {
 179    __GLXDRIdrawablePrivate *pdp = loaderPrivate;
 180    __GLXDRIdrawable *pdraw = &(pdp->base);;
 181    Display *dpy = pdraw->psc->dpy;
 182    Drawable drawable;
 183    XImage *ximage;
 184
 185    drawable = pdraw->xDrawable;
 186
 187    ximage = pdp->ximage;
 188    ximage->data = data;
 189    ximage->width = w;
 190    ximage->height = h;
 191    ximage->bytes_per_line = bytes_per_line(w, pdp->bpp, 32);
 192
 193    XGetSubImage(dpy, drawable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 194
 195    ximage->data = NULL;
 196 }
 197
 198 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 199    {__DRI_SWRAST_LOADER, __DRI_SWRAST_LOADER_VERSION},
 200    swrastGetDrawableInfo,
 201    swrastPutImage,
 202    swrastGetImage
 203 };
 204
 205 static const __DRIextension *loader_extensions[] = {
 206    &systemTimeExtension.base,
 207    &swrastLoaderExtension.base,
 208    NULL
 209 };
 210
 211 /**
 212  * GLXDRI functions
 213  */
 214
 215 static void
 216 driDestroyContext(__GLXDRIcontext * context,
 217                   __GLXscreenConfigs * psc, Display * dpy)
 218 {
 219    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 220    const __DRIcoreExtension *core = pcp->psc->core;
 221
 222    (*core->destroyContext) (pcp->driContext);
 223
 224    Xfree(pcp);
 225 }
 226
 227 static Bool
 228 driBindContext(__GLXDRIcontext * context,
 229                __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 230 {
 231    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 232    const __DRIcoreExtension *core = pcp->psc->core;
 233
 234    return (*core->bindContext) (pcp->driContext,
 235                                 draw->driDrawable, read->driDrawable);
 236 }
 237
 238 static void
 239 driUnbindContext(__GLXDRIcontext * context)
 240 {
 241    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 242    const __DRIcoreExtension *core = pcp->psc->core;
 243
 244    (*core->unbindContext) (pcp->driContext);
 245 }
 246
 247 static __GLXDRIcontext *
 248 driCreateContext(__GLXscreenConfigs * psc,
 249                  const __GLcontextModes * mode,
 250                  GLXContext gc, GLXContext shareList, int renderType)
 251 {
 252    __GLXDRIcontextPrivate *pcp, *pcp_shared;
 253    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 254    const __DRIcoreExtension *core = psc->core;
 255    __DRIcontext *shared = NULL;
 256
 257    if (!psc || !psc->driScreen)
 258       return NULL;
 259
 260    if (shareList) {
 261       pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 262       shared = pcp_shared->driContext;
 263    }
 264
 265    pcp = Xmalloc(sizeof *pcp);
 266    if (pcp == NULL)
 267       return NULL;
 268
 269    pcp->psc = psc;
 270    pcp->driContext =
 271       (*core->createNewContext) (psc->__driScreen,
 272                                  config->driConfig, shared, pcp);
 273    if (pcp->driContext == NULL) {
 274       Xfree(pcp);
 275       return NULL;
 276    }
 277
 278    pcp->base.destroyContext = driDestroyContext;
 279    pcp->base.bindContext = driBindContext;
 280    pcp->base.unbindContext = driUnbindContext;
 281
 282    return &pcp->base;
 283 }
 284
 285 static void
 286 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 287 {
 288    __GLXDRIdrawablePrivate *pdp = (__GLXDRIdrawablePrivate *) pdraw;
 289    const __DRIcoreExtension *core = pdraw->psc->core;
 290
 291    (*core->destroyDrawable) (pdraw->driDrawable);
 292
 293    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 294    Xfree(pdp);
 295 }
 296
 297 static __GLXDRIdrawable *
 298 driCreateDrawable(__GLXscreenConfigs * psc,
 299                   XID xDrawable,
 300                   GLXDrawable drawable, const __GLcontextModes * modes)
 301 {
 302    __GLXDRIdrawable *pdraw;
 303    __GLXDRIdrawablePrivate *pdp;
 304    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 305    const __DRIswrastExtension *swrast = psc->swrast;
 306
 307    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 308    if (xDrawable != drawable)
 309       return NULL;
 310
 311    pdp = Xmalloc(sizeof(*pdp));
 312    if (!pdp)
 313       return NULL;
 314
 315    pdraw = &(pdp->base);
 316    pdraw->xDrawable = xDrawable;
 317    pdraw->drawable = drawable;
 318    pdraw->psc = psc;
 319
 320    XCreateDrawable(pdp, psc->dpy, xDrawable, modes->visualID);
 321
 322    /* Create a new drawable */
 323    pdraw->driDrawable =
 324       (*swrast->createNewDrawable) (psc->__driScreen, config->driConfig, pdp);
 325
 326    if (!pdraw->driDrawable) {
 327       XDestroyDrawable(pdp, psc->dpy, xDrawable);
 328       Xfree(pdp);
 329       return NULL;
 330    }
 331
 332    pdraw->destroyDrawable = driDestroyDrawable;
 333
 334    return pdraw;
 335 }
 336
 337 static void
 338 driSwapBuffers(__GLXDRIdrawable * pdraw)
 339 {
 340    (*pdraw->psc->core->swapBuffers) (pdraw->driDrawable);
 341 }
 342
 343 static void
 344 driDestroyScreen(__GLXscreenConfigs * psc)
 345 {
 346    /* Free the direct rendering per screen data */
 347    (*psc->core->destroyScreen) (psc->__driScreen);
 348    psc->__driScreen = NULL;
 349    if (psc->driver)
 350       dlclose(psc->driver);
 351 }
 352
 353 static __GLXDRIscreen *
 354 driCreateScreen(__GLXscreenConfigs * psc, int screen,
 355                 __GLXdisplayPrivate * priv)
 356 {
 357    __GLXDRIscreen *psp;
 358    const __DRIconfig **driver_configs;
 359    const __DRIextension **extensions;
 360    const char *driverName = "swrast";
 361    int i;
 362
 363    psp = Xmalloc(sizeof *psp);
 364    if (psp == NULL)
 365       return NULL;
 366
 367    /* Initialize per screen dynamic client GLX extensions */
 368    psc->ext_list_first_time = GL_TRUE;
 369
 370    psc->driver = driOpenDriver(driverName);
 371    if (psc->driver == NULL)
 372       goto handle_error;
 373
 374    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 375    if (extensions == NULL) {
 376       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 377       goto handle_error;
 378    }
 379
 380    for (i = 0; extensions[i]; i++) {
 381       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 382          psc->core = (__DRIcoreExtension *) extensions[i];
 383       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 384          psc->swrast = (__DRIswrastExtension *) extensions[i];
 385    }
 386
 387    if (psc->core == NULL || psc->swrast == NULL) {
 388       ErrorMessageF("core dri extension not found\n");
 389       goto handle_error;
 390    }
 391
 392    psc->__driScreen =
 393       psc->swrast->createNewScreen(screen,
 394                                    loader_extensions, &driver_configs, psc);
 395    if (psc->__driScreen == NULL) {
 396       ErrorMessageF("failed to create dri screen\n");
 397       goto handle_error;
 398    }
 399
 400    driBindExtensions(psc, 0);
 401
 402    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 403    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 404
 405    psp->destroyScreen = driDestroyScreen;
 406    psp->createContext = driCreateContext;
 407    psp->createDrawable = driCreateDrawable;
 408    psp->swapBuffers = driSwapBuffers;
 409
 410    return psp;
 411
 412  handle_error:
 413    Xfree(psp);
 414
 415    if (psc->driver)
 416       dlclose(psc->driver);
 417
 418    ErrorMessageF("reverting to indirect rendering\n");
 419
 420    return NULL;
 421 }
 422
 423 /* Called from __glXFreeDisplayPrivate.
 424  */
 425 static void
 426 driDestroyDisplay(__GLXDRIdisplay * dpy)
 427 {
 428    Xfree(dpy);
 429 }
 430
 431 /*
 432  * Allocate, initialize and return a __DRIdisplayPrivate object.
 433  * This is called from __glXInitialize() when we are given a new
 434  * display pointer.
 435  */
 436 _X_HIDDEN __GLXDRIdisplay *
 437 driswCreateDisplay(Display * dpy)
 438 {
 439    __GLXDRIdisplayPrivate *pdpyp;
 440
 441    pdpyp = Xmalloc(sizeof *pdpyp);
 442    if (pdpyp == NULL)
 443       return NULL;
 444
 445    pdpyp->base.destroyDisplay = driDestroyDisplay;
 446    pdpyp->base.createScreen = driCreateScreen;
 447
 448    return &pdpyp->base;
 449 }
 450
 451 #endif /* GLX_DIRECT_RENDERING */