src/gallium/state_trackers/egl/x11/x11_screen.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.8
   4  *
   5  * Copyright (C) 2009-2010 Chia-I Wu <olv@0xlab.org>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <xf86drm.h>
  31 #include <X11/Xlibint.h>
  32 #include <X11/extensions/XShm.h>
  33
  34 #include "util/u_memory.h"
  35 #include "egllog.h"
  36
  37 #include "x11_screen.h"
  38 #include "dri2.h"
  39 #include "glxinit.h"
  40
  41 struct x11_screen {
  42    Display *dpy;
  43    int number;
  44
  45    /*
  46     * This is used to fetch GLX visuals/fbconfigs.  It steals code from GLX.
  47     * It might be better to rewrite the part in Xlib or XCB.
  48     */
  49    __GLXdisplayPrivate *glx_dpy;
  50
  51    int dri_major, dri_minor;
  52    char *dri_driver;
  53    char *dri_device;
  54    int dri_fd;
  55
  56    x11_drawable_invalidate_buffers dri_invalidate_buffers;
  57    void *dri_user_data;
  58
  59    XVisualInfo *visuals;
  60    int num_visuals;
  61
  62    /* cached values for x11_drawable_get_depth */
  63    Drawable last_drawable;
  64    unsigned int last_depth;
  65 };
  66
  67
  68 /**
  69  * Create a X11 screen.
  70  */
  71 struct x11_screen *
  72 x11_screen_create(Display *dpy, int screen)
  73 {
  74    struct x11_screen *xscr;
  75
  76    if (screen >= ScreenCount(dpy))
  77       return NULL;
  78
  79    xscr = CALLOC_STRUCT(x11_screen);
  80    if (xscr) {
  81       xscr->dpy = dpy;
  82       xscr->number = screen;
  83
  84       xscr->dri_major = -1;
  85       xscr->dri_fd = -1;
  86    }
  87    return xscr;
  88 }
  89
  90 /**
  91  * Destroy a X11 screen.
  92  */
  93 void
  94 x11_screen_destroy(struct x11_screen *xscr)
  95 {
  96    if (xscr->dri_fd >= 0)
  97       close(xscr->dri_fd);
  98    if (xscr->dri_driver)
  99       Xfree(xscr->dri_driver);
 100    if (xscr->dri_device)
 101       Xfree(xscr->dri_device);
 102
 103 #ifdef GLX_DIRECT_RENDERING
 104    /* xscr->glx_dpy will be destroyed with the X display */
 105    if (xscr->glx_dpy)
 106       xscr->glx_dpy->xscr = NULL;
 107 #endif
 108
 109    if (xscr->visuals)
 110       XFree(xscr->visuals);
 111    FREE(xscr);
 112 }
 113
 114 #ifdef GLX_DIRECT_RENDERING
 115
 116 static boolean
 117 x11_screen_init_dri2(struct x11_screen *xscr)
 118 {
 119    if (xscr->dri_major < 0) {
 120       int eventBase, errorBase;
 121
 122       if (!DRI2QueryExtension(xscr->dpy, &eventBase, &errorBase) ||
 123           !DRI2QueryVersion(xscr->dpy, &xscr->dri_major, &xscr->dri_minor))
 124          xscr->dri_major = -1;
 125    }
 126    return (xscr->dri_major >= 0);
 127 }
 128
 129 static boolean
 130 x11_screen_init_glx(struct x11_screen *xscr)
 131 {
 132    if (!xscr->glx_dpy)
 133       xscr->glx_dpy = __glXInitialize(xscr->dpy);
 134    return (xscr->glx_dpy != NULL);
 135 }
 136
 137 #endif /* GLX_DIRECT_RENDERING */
 138
 139 /**
 140  * Return true if the screen supports the extension.
 141  */
 142 boolean
 143 x11_screen_support(struct x11_screen *xscr, enum x11_screen_extension ext)
 144 {
 145    boolean supported = FALSE;
 146
 147    switch (ext) {
 148    case X11_SCREEN_EXTENSION_XSHM:
 149       supported = XShmQueryExtension(xscr->dpy);
 150       break;
 151 #ifdef GLX_DIRECT_RENDERING
 152    case X11_SCREEN_EXTENSION_GLX:
 153       supported = x11_screen_init_glx(xscr);
 154       break;
 155    case X11_SCREEN_EXTENSION_DRI2:
 156       supported = x11_screen_init_dri2(xscr);
 157       break;
 158 #endif
 159    default:
 160       break;
 161    }
 162
 163    return supported;
 164 }
 165
 166 /**
 167  * Return the X visuals.
 168  */
 169 const XVisualInfo *
 170 x11_screen_get_visuals(struct x11_screen *xscr, int *num_visuals)
 171 {
 172    if (!xscr->visuals) {
 173       XVisualInfo vinfo_template;
 174       vinfo_template.screen = xscr->number;
 175       xscr->visuals = XGetVisualInfo(xscr->dpy, VisualScreenMask,
 176             &vinfo_template, &xscr->num_visuals);
 177    }
 178
 179    if (num_visuals)
 180       *num_visuals = xscr->num_visuals;
 181    return xscr->visuals;
 182 }
 183
 184 /**
 185  * Return the depth of a drawable.
 186  *
 187  * Unlike other drawable functions, the drawable needs not be a DRI2 drawable.
 188  */
 189 uint
 190 x11_drawable_get_depth(struct x11_screen *xscr, Drawable drawable)
 191 {
 192    unsigned int depth;
 193
 194    if (drawable != xscr->last_drawable) {
 195       Window root;
 196       int x, y;
 197       unsigned int w, h, border;
 198       Status ok;
 199
 200       ok = XGetGeometry(xscr->dpy, drawable, &root,
 201             &x, &y, &w, &h, &border, &depth);
 202       if (!ok)
 203          depth = 0;
 204
 205       xscr->last_drawable = drawable;
 206       xscr->last_depth = depth;
 207    }
 208    else {
 209       depth = xscr->last_depth;
 210    }
 211
 212    return depth;
 213 }
 214
 215 #ifdef GLX_DIRECT_RENDERING
 216
 217 /**
 218  * Return the GLX fbconfigs.
 219  */
 220 const __GLcontextModes *
 221 x11_screen_get_glx_configs(struct x11_screen *xscr)
 222 {
 223    return (x11_screen_init_glx(xscr))
 224       ? xscr->glx_dpy->screenConfigs[xscr->number]->configs
 225       : NULL;
 226 }
 227
 228 /**
 229  * Probe the screen for the DRI2 driver name.
 230  */
 231 const char *
 232 x11_screen_probe_dri2(struct x11_screen *xscr, int *major, int *minor)
 233 {
 234    if (!x11_screen_init_dri2(xscr))
 235       return NULL;
 236
 237    /* get the driver name and the device name */
 238    if (!xscr->dri_driver) {
 239       if (!DRI2Connect(xscr->dpy, RootWindow(xscr->dpy, xscr->number),
 240                &xscr->dri_driver, &xscr->dri_device))
 241          xscr->dri_driver = xscr->dri_device = NULL;
 242    }
 243    if (major)
 244       *major = xscr->dri_major;
 245    if (minor)
 246       *minor = xscr->dri_minor;
 247
 248    return xscr->dri_driver;
 249 }
 250
 251 /**
 252  * Enable DRI2 and returns the file descriptor of the DRM device.  The file
 253  * descriptor will be closed automatically when the screen is destoryed.
 254  */
 255 int
 256 x11_screen_enable_dri2(struct x11_screen *xscr,
 257                        x11_drawable_invalidate_buffers invalidate_buffers,
 258                        void *user_data)
 259 {
 260    if (xscr->dri_fd < 0) {
 261       int fd;
 262       drm_magic_t magic;
 263
 264       /* get the driver name and the device name first */
 265       if (!x11_screen_probe_dri2(xscr, NULL, NULL))
 266          return -1;
 267
 268       fd = open(xscr->dri_device, O_RDWR);
 269       if (fd < 0) {
 270          _eglLog(_EGL_WARNING, "failed to open %s", xscr->dri_device);
 271          return -1;
 272       }
 273
 274       memset(&magic, 0, sizeof(magic));
 275       if (drmGetMagic(fd, &magic)) {
 276          _eglLog(_EGL_WARNING, "failed to get magic");
 277          close(fd);
 278          return -1;
 279       }
 280
 281       if (!DRI2Authenticate(xscr->dpy,
 282                RootWindow(xscr->dpy, xscr->number), magic)) {
 283          _eglLog(_EGL_WARNING, "failed to authenticate magic");
 284          close(fd);
 285          return -1;
 286       }
 287
 288       if (!x11_screen_init_glx(xscr)) {
 289          _eglLog(_EGL_WARNING, "failed to initialize GLX");
 290          close(fd);
 291          return -1;
 292       }
 293       if (xscr->glx_dpy->xscr) {
 294          _eglLog(_EGL_WARNING,
 295                "display is already managed by another x11 screen");
 296          close(fd);
 297          return -1;
 298       }
 299
 300       xscr->glx_dpy->xscr = xscr;
 301       xscr->dri_invalidate_buffers = invalidate_buffers;
 302       xscr->dri_user_data = user_data;
 303
 304       xscr->dri_fd = fd;
 305    }
 306
 307    return xscr->dri_fd;
 308 }
 309
 310 /**
 311  * Create/Destroy the DRI drawable.
 312  */
 313 void
 314 x11_drawable_enable_dri2(struct x11_screen *xscr,
 315                          Drawable drawable, boolean on)
 316 {
 317    if (on)
 318       DRI2CreateDrawable(xscr->dpy, drawable);
 319    else
 320       DRI2DestroyDrawable(xscr->dpy, drawable);
 321 }
 322
 323 /**
 324  * Copy between buffers of the DRI2 drawable.
 325  */
 326 void
 327 x11_drawable_copy_buffers(struct x11_screen *xscr, Drawable drawable,
 328                           int x, int y, int width, int height,
 329                           int src_buf, int dst_buf)
 330 {
 331    XRectangle rect;
 332    XserverRegion region;
 333
 334    rect.x = x;
 335    rect.y = y;
 336    rect.width = width;
 337    rect.height = height;
 338
 339    region = XFixesCreateRegion(xscr->dpy, &rect, 1);
 340    DRI2CopyRegion(xscr->dpy, drawable, region, dst_buf, src_buf);
 341    XFixesDestroyRegion(xscr->dpy, region);
 342 }
 343
 344 /**
 345  * Get the buffers of the DRI2 drawable.  The returned array should be freed.
 346  */
 347 struct x11_drawable_buffer *
 348 x11_drawable_get_buffers(struct x11_screen *xscr, Drawable drawable,
 349                          int *width, int *height, unsigned int *attachments,
 350                          boolean with_format, int num_ins, int *num_outs)
 351 {
 352    DRI2Buffer *dri2bufs;
 353
 354    if (with_format)
 355       dri2bufs = DRI2GetBuffersWithFormat(xscr->dpy, drawable, width, height,
 356             attachments, num_ins, num_outs);
 357    else
 358       dri2bufs = DRI2GetBuffers(xscr->dpy, drawable, width, height,
 359             attachments, num_ins, num_outs);
 360
 361    return (struct x11_drawable_buffer *) dri2bufs;
 362 }
 363
 364 /**
 365  * Create a mode list of the given size.
 366  */
 367 __GLcontextModes *
 368 x11_context_modes_create(unsigned count)
 369 {
 370    const size_t size = sizeof(__GLcontextModes);
 371    __GLcontextModes *base = NULL;
 372    __GLcontextModes **next;
 373    unsigned i;
 374
 375    next = &base;
 376    for (i = 0; i < count; i++) {
 377       *next = (__GLcontextModes *) CALLOC(1, size);
 378       if (*next == NULL) {
 379          x11_context_modes_destroy(base);
 380          base = NULL;
 381          break;
 382       }
 383       next = &((*next)->next);
 384    }
 385
 386    return base;
 387 }
 388
 389 /**
 390  * Destroy a mode list.
 391  */
 392 void
 393 x11_context_modes_destroy(__GLcontextModes *modes)
 394 {
 395    while (modes != NULL) {
 396       __GLcontextModes *next = modes->next;
 397       FREE(modes);
 398       modes = next;
 399    }
 400 }
 401
 402 /**
 403  * Return the number of the modes in the mode list.
 404  */
 405 unsigned
 406 x11_context_modes_count(const __GLcontextModes *modes)
 407 {
 408    const __GLcontextModes *mode;
 409    int count = 0;
 410    for (mode = modes; mode; mode = mode->next)
 411       count++;
 412    return count;
 413 }
 414
 415 extern void
 416 dri2InvalidateBuffers(Display *dpy, XID drawable);
 417
 418 /**
 419  * This is called from src/glx/dri2.c.
 420  */
 421 void
 422 dri2InvalidateBuffers(Display *dpy, XID drawable)
 423 {
 424    __GLXdisplayPrivate *priv = __glXInitialize(dpy);
 425    struct x11_screen *xscr = NULL;
 426
 427    if (priv && priv->xscr)
 428       xscr = priv->xscr;
 429    if (!xscr || !xscr->dri_invalidate_buffers)
 430       return;
 431
 432    xscr->dri_invalidate_buffers(xscr, drawable, xscr->dri_user_data);
 433 }
 434
 435 extern unsigned
 436 dri2GetSwapEventType(Display *dpy, XID drawable);
 437
 438 /**
 439  * This is also called from src/glx/dri2.c.
 440  */
 441 unsigned dri2GetSwapEventType(Display *dpy, XID drawable)
 442 {
 443    return 0;
 444 }
 445
 446 #endif /* GLX_DIRECT_RENDERING */