src/glx/x11/dri2.c

   1 /* -*- mode: c; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3; coding: utf-8-unix -*- */
   2 /*
   3  * Copyright © 2008 Red Hat, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Soft-
   7  * ware"), to deal in the Software without restriction, including without
   8  * limitation the rights to use, copy, modify, merge, publish, distribute,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, provided that the above copyright
  11  * notice(s) and this permission notice appear in all copies of the Soft-
  12  * ware and that both the above copyright notice(s) and this permission
  13  * notice appear in supporting documentation.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  17  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  18  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  19  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  20  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  21  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  22  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  23  * MANCE OF THIS SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of a copyright holder shall
  26  * not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization of
  28  * the copyright holder.
  29  *
  30  * Authors:
  31  *   Kristian Høgsberg (krh@redhat.com)
  32  */
  33
  34
  35 #define NEED_REPLIES
  36 #include <X11/Xlibint.h>
  37 #include <X11/extensions/Xext.h>
  38 #include <X11/extensions/extutil.h>
  39 #include <X11/extensions/dri2proto.h>
  40 #include "xf86drm.h"
  41 #include "dri2.h"
  42
  43 static char dri2ExtensionName[] = DRI2_NAME;
  44 static XExtensionInfo *dri2Info;
  45 static
  46 XEXT_GENERATE_CLOSE_DISPLAY(DRI2CloseDisplay, dri2Info)
  47      static /* const */ XExtensionHooks dri2ExtensionHooks = {
  48         NULL,                   /* create_gc */
  49         NULL,                   /* copy_gc */
  50         NULL,                   /* flush_gc */
  51         NULL,                   /* free_gc */
  52         NULL,                   /* create_font */
  53         NULL,                   /* free_font */
  54         DRI2CloseDisplay,       /* close_display */
  55         NULL,                   /* wire_to_event */
  56         NULL,                   /* event_to_wire */
  57         NULL,                   /* error */
  58         NULL,                   /* error_string */
  59      };
  60
  61 static
  62 XEXT_GENERATE_FIND_DISPLAY(DRI2FindDisplay, dri2Info,
  63                            dri2ExtensionName, &dri2ExtensionHooks, 0, NULL)
  64
  65      Bool DRI2QueryExtension(Display * dpy, int *eventBase, int *errorBase)
  66 {
  67    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
  68
  69    if (XextHasExtension(info)) {
  70       *eventBase = info->codes->first_event;
  71       *errorBase = info->codes->first_error;
  72       return True;
  73    }
  74
  75    return False;
  76 }
  77
  78 Bool
  79 DRI2QueryVersion(Display * dpy, int *major, int *minor)
  80 {
  81    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
  82    xDRI2QueryVersionReply rep;
  83    xDRI2QueryVersionReq *req;
  84
  85    XextCheckExtension(dpy, info, dri2ExtensionName, False);
  86
  87    LockDisplay(dpy);
  88    GetReq(DRI2QueryVersion, req);
  89    req->reqType = info->codes->major_opcode;
  90    req->dri2ReqType = X_DRI2QueryVersion;
  91    req->majorVersion = DRI2_MAJOR;
  92    req->minorVersion = DRI2_MINOR;
  93    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
  94       UnlockDisplay(dpy);
  95       SyncHandle();
  96       return False;
  97    }
  98    *major = rep.majorVersion;
  99    *minor = rep.minorVersion;
 100    UnlockDisplay(dpy);
 101    SyncHandle();
 102
 103    return True;
 104 }
 105
 106 Bool
 107 DRI2Connect(Display * dpy, int screen,
 108             char **driverName, char **busId, unsigned int *sareaHandle)
 109 {
 110    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 111    xDRI2ConnectReply rep;
 112    xDRI2ConnectReq *req;
 113
 114    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 115
 116    LockDisplay(dpy);
 117    GetReq(DRI2Connect, req);
 118    req->reqType = info->codes->major_opcode;
 119    req->dri2ReqType = X_DRI2Connect;
 120    req->screen = screen;
 121    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 122       UnlockDisplay(dpy);
 123       SyncHandle();
 124       return False;
 125    }
 126
 127    if (rep.driverNameLength == 0 && rep.busIdLength == 0) {
 128       UnlockDisplay(dpy);
 129       SyncHandle();
 130       return False;
 131    }
 132
 133    *driverName = Xmalloc(rep.driverNameLength + 1);
 134    if (*driverName == NULL) {
 135       _XEatData(dpy,
 136                 ((rep.driverNameLength + 3) & ~3) +
 137                 ((rep.busIdLength + 3) & ~3));
 138       UnlockDisplay(dpy);
 139       SyncHandle();
 140       return False;
 141    }
 142    _XReadPad(dpy, *driverName, rep.driverNameLength);
 143    (*driverName)[rep.driverNameLength] = '\0';
 144
 145    *busId = Xmalloc(rep.busIdLength + 1);
 146    if (*busId == NULL) {
 147       Xfree(*driverName);
 148       _XEatData(dpy, ((rep.busIdLength + 3) & ~3));
 149       UnlockDisplay(dpy);
 150       SyncHandle();
 151       return False;
 152    }
 153    _XReadPad(dpy, *busId, rep.busIdLength);
 154    (*busId)[rep.busIdLength] = '\0';
 155
 156    UnlockDisplay(dpy);
 157    SyncHandle();
 158
 159    return True;
 160 }
 161
 162 Bool
 163 DRI2AuthConnection(Display * dpy, int screen, drm_magic_t magic)
 164 {
 165    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 166    xDRI2AuthConnectionReq *req;
 167    xDRI2AuthConnectionReply rep;
 168
 169    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 170
 171    LockDisplay(dpy);
 172    GetReq(DRI2AuthConnection, req);
 173    req->reqType = info->codes->major_opcode;
 174    req->dri2ReqType = X_DRI2AuthConnection;
 175    req->screen = screen;
 176    req->magic = magic;
 177    rep.authenticated = 0;
 178    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 179       UnlockDisplay(dpy);
 180       SyncHandle();
 181       return False;
 182    }
 183    UnlockDisplay(dpy);
 184    SyncHandle();
 185
 186    return rep.authenticated;
 187 }
 188
 189 void
 190 DRI2CreateDrawable(Display * dpy, XID drawable)
 191 {
 192    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 193    xDRI2CreateDrawableReq *req;
 194
 195    XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
 196
 197    LockDisplay(dpy);
 198    GetReq(DRI2CreateDrawable, req);
 199    req->reqType = info->codes->major_opcode;
 200    req->dri2ReqType = X_DRI2CreateDrawable;
 201    req->drawable = drawable;
 202    UnlockDisplay(dpy);
 203    SyncHandle();
 204 }
 205
 206 DRI2Buffer *
 207 DRI2GetBuffers(Display * dpy, XID drawable,
 208                int *width, int *height,
 209                unsigned int *attachments, int count, int *outCount)
 210 {
 211    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 212    xDRI2GetBuffersReply rep;
 213    xDRI2GetBuffersReq *req;
 214    DRI2Buffer *buffers;
 215    xDRI2Buffer repBuffer;
 216    CARD32 *p;
 217    int i;
 218
 219    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 220
 221    LockDisplay(dpy);
 222    GetReqExtra(DRI2GetBuffers, count * 4, req);
 223    req->reqType = info->codes->major_opcode;
 224    req->dri2ReqType = X_DRI2GetBuffers;
 225    req->drawable = drawable;
 226    req->count = count;
 227    p = (CARD32 *) & req[1];
 228    for (i = 0; i < count; i++)
 229       p[i] = attachments[i];
 230
 231    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 232       UnlockDisplay(dpy);
 233       SyncHandle();
 234       return NULL;
 235    }
 236
 237    *width = rep.width;
 238    *height = rep.height;
 239    *outCount = rep.count;
 240
 241    buffers = Xmalloc(count * sizeof buffers[0]);
 242    if (buffers == NULL) {
 243       _XEatData(dpy, rep.count * sizeof repBuffer);
 244       UnlockDisplay(dpy);
 245       SyncHandle();
 246       return NULL;
 247    }
 248
 249    for (i = 0; i < rep.count; i++) {
 250       _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
 251       buffers[i].attachment = repBuffer.attachment;
 252       buffers[i].name = repBuffer.name;
 253       buffers[i].pitch = repBuffer.pitch;
 254       buffers[i].cpp = repBuffer.cpp;
 255       buffers[i].flags = repBuffer.flags;
 256    }
 257
 258    UnlockDisplay(dpy);
 259    SyncHandle();
 260
 261    return buffers;
 262 }
 263
 264 void
 265 DRI2SwapBuffers(Display * dpy, XID drawable,
 266                 int x, int y, int width, int height)
 267 {
 268    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 269    xDRI2SwapBuffersReq *req;
 270    xDRI2SwapBuffersReply rep;
 271
 272    XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
 273
 274    LockDisplay(dpy);
 275    GetReq(DRI2SwapBuffers, req);
 276    req->reqType = info->codes->major_opcode;
 277    req->dri2ReqType = X_DRI2SwapBuffers;
 278    req->drawable = drawable;
 279    req->x = x;
 280    req->y = y;
 281    req->width = width;
 282    req->height = height;
 283
 284    _XReply(dpy, (xReply *) & rep, 0, xFalse);
 285
 286    UnlockDisplay(dpy);
 287    SyncHandle();
 288 }
 289
 290 void
 291 DRI2DestroyDrawable(Display * dpy, XID drawable)
 292 {
 293    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 294    xDRI2DestroyDrawableReq *req;
 295
 296    XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
 297
 298    XSync(dpy, False);
 299
 300    LockDisplay(dpy);
 301    GetReq(DRI2DestroyDrawable, req);
 302    req->reqType = info->codes->major_opcode;
 303    req->dri2ReqType = X_DRI2DestroyDrawable;
 304    req->drawable = drawable;
 305    UnlockDisplay(dpy);
 306    SyncHandle();
 307 }