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 XEXT_GENERATE_CLOSE_DISPLAY (DRI2CloseDisplay, dri2Info)
  46 static /* const */ XExtensionHooks dri2ExtensionHooks = {
  47     NULL,                               /* create_gc */
  48     NULL,                               /* copy_gc */
  49     NULL,                               /* flush_gc */
  50     NULL,                               /* free_gc */
  51     NULL,                               /* create_font */
  52     NULL,                               /* free_font */
  53     DRI2CloseDisplay,                   /* close_display */
  54     NULL,                               /* wire_to_event */
  55     NULL,                               /* event_to_wire */
  56     NULL,                               /* error */
  57     NULL,                               /* error_string */
  58 };
  59
  60 static XEXT_GENERATE_FIND_DISPLAY (DRI2FindDisplay, dri2Info,
  61                                    dri2ExtensionName,
  62                                    &dri2ExtensionHooks,
  63                                    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 DRI2QueryVersion(Display *dpy, int *major, int *minor)
  79 {
  80     XExtDisplayInfo *info = DRI2FindDisplay (dpy);
  81     xDRI2QueryVersionReply rep;
  82     xDRI2QueryVersionReq *req;
  83
  84     XextCheckExtension (dpy, info, dri2ExtensionName, False);
  85
  86     LockDisplay(dpy);
  87     GetReq(DRI2QueryVersion, req);
  88     req->reqType = info->codes->major_opcode;
  89     req->dri2ReqType = X_DRI2QueryVersion;
  90     req->majorVersion = DRI2_MAJOR;
  91     req->minorVersion = DRI2_MINOR;
  92     if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
  93         UnlockDisplay(dpy);
  94         SyncHandle();
  95         return False;
  96     }
  97     *major = rep.majorVersion;
  98     *minor = rep.minorVersion;
  99     UnlockDisplay(dpy);
 100     SyncHandle();
 101
 102     return True;
 103 }
 104
 105 Bool DRI2Connect(Display *dpy, int screen,
 106                  char **driverName, char **busId, unsigned int *sareaHandle)
 107 {
 108     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 109     xDRI2ConnectReply rep;
 110     xDRI2ConnectReq *req;
 111
 112     XextCheckExtension (dpy, info, dri2ExtensionName, False);
 113
 114     LockDisplay(dpy);
 115     GetReq(DRI2Connect, req);
 116     req->reqType = info->codes->major_opcode;
 117     req->dri2ReqType = X_DRI2Connect;
 118     req->screen = screen;
 119     if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
 120         UnlockDisplay(dpy);
 121         SyncHandle();
 122         return False;
 123     }
 124
 125     if (rep.driverNameLength == 0 && rep.busIdLength == 0) {
 126         UnlockDisplay(dpy);
 127         SyncHandle();
 128         return False;
 129     }
 130
 131     *driverName = Xmalloc(rep.driverNameLength + 1);
 132     if (*driverName == NULL) {
 133         _XEatData(dpy,
 134                   ((rep.driverNameLength + 3) & ~3) +
 135                   ((rep.busIdLength + 3) & ~3));
 136         UnlockDisplay(dpy);
 137         SyncHandle();
 138         return False;
 139     }
 140     _XReadPad(dpy, *driverName, rep.driverNameLength);
 141     (*driverName)[rep.driverNameLength] = '\0';
 142
 143     *busId = Xmalloc(rep.busIdLength + 1);
 144     if (*busId == NULL) {
 145         Xfree(*driverName);
 146         _XEatData(dpy, ((rep.busIdLength + 3) & ~3));
 147         UnlockDisplay(dpy);
 148         SyncHandle();
 149         return False;
 150     }
 151     _XReadPad(dpy, *busId, rep.busIdLength);
 152     (*busId)[rep.busIdLength] = '\0';
 153
 154     UnlockDisplay(dpy);
 155     SyncHandle();
 156
 157     return True;
 158 }
 159
 160 Bool DRI2AuthConnection(Display *dpy, int screen, drm_magic_t magic)
 161 {
 162     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 163     xDRI2AuthConnectionReq *req;
 164     xDRI2AuthConnectionReply rep;
 165
 166     XextCheckExtension (dpy, info, dri2ExtensionName, False);
 167
 168     LockDisplay(dpy);
 169     GetReq(DRI2AuthConnection, req);
 170     req->reqType = info->codes->major_opcode;
 171     req->dri2ReqType = X_DRI2AuthConnection;
 172     req->screen = screen;
 173     req->magic = magic;
 174     rep.authenticated = 0;
 175     if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
 176         UnlockDisplay(dpy);
 177         SyncHandle();
 178         return False;
 179     }
 180     UnlockDisplay(dpy);
 181     SyncHandle();
 182
 183     return rep.authenticated;
 184 }
 185
 186 void DRI2CreateDrawable(Display *dpy, XID drawable)
 187 {
 188     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 189     xDRI2CreateDrawableReq *req;
 190
 191     XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
 192
 193     LockDisplay(dpy);
 194     GetReq(DRI2CreateDrawable, req);
 195     req->reqType = info->codes->major_opcode;
 196     req->dri2ReqType = X_DRI2CreateDrawable;
 197     req->drawable = drawable;
 198     UnlockDisplay(dpy);
 199     SyncHandle();
 200 }
 201
 202 DRI2Buffer *DRI2GetBuffers(Display *dpy, XID drawable,
 203                            int *width, int *height,
 204                            unsigned int *attachments, int count,
 205                            int *outCount)
 206 {
 207     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 208     xDRI2GetBuffersReply rep;
 209     xDRI2GetBuffersReq *req;
 210     DRI2Buffer *buffers;
 211     xDRI2Buffer repBuffer;
 212     CARD32 *p;
 213     int i;
 214
 215     XextCheckExtension (dpy, info, dri2ExtensionName, False);
 216
 217     LockDisplay(dpy);
 218     GetReqExtra(DRI2GetBuffers, count * 4, req);
 219     req->reqType = info->codes->major_opcode;
 220     req->dri2ReqType = X_DRI2GetBuffers;
 221     req->drawable = drawable;
 222     req->count = count;
 223     p = (CARD32 *) &req[1];
 224     for (i = 0; i < count; i++)
 225         p[i] = attachments[i];
 226
 227     if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
 228         UnlockDisplay(dpy);
 229         SyncHandle();
 230         return NULL;
 231     }
 232
 233     *width = rep.width;
 234     *height = rep.height;
 235     *outCount = rep.count;
 236
 237     buffers = Xmalloc(count * sizeof buffers[0]);
 238     if (buffers == NULL) {
 239         _XEatData(dpy, rep.count * sizeof repBuffer);
 240         UnlockDisplay(dpy);
 241         SyncHandle();
 242         return NULL;
 243     }
 244
 245     for (i = 0; i < rep.count; i++) {
 246         _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
 247         buffers[i].attachment = repBuffer.attachment;
 248         buffers[i].name = repBuffer.name;
 249         buffers[i].pitch = repBuffer.pitch;
 250         buffers[i].cpp = repBuffer.cpp;
 251         buffers[i].flags = repBuffer.flags;
 252     }
 253
 254     UnlockDisplay(dpy);
 255     SyncHandle();
 256
 257     return buffers;
 258 }
 259
 260 void DRI2SwapBuffers(Display *dpy, XID drawable,
 261                      int x, int y, int width, int height)
 262 {
 263     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 264     xDRI2SwapBuffersReq *req;
 265     xDRI2SwapBuffersReply rep;
 266
 267     XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
 268
 269     LockDisplay(dpy);
 270     GetReq(DRI2SwapBuffers, req);
 271     req->reqType = info->codes->major_opcode;
 272     req->dri2ReqType = X_DRI2SwapBuffers;
 273     req->drawable = drawable;
 274     req->x = x;
 275     req->y = y;
 276     req->width = width;
 277     req->height = height;
 278
 279     _XReply(dpy, (xReply *)&rep, 0, xFalse);
 280
 281     UnlockDisplay(dpy);
 282     SyncHandle();
 283 }
 284
 285 void DRI2DestroyDrawable(Display *dpy, XID drawable)
 286 {
 287     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 288     xDRI2DestroyDrawableReq *req;
 289
 290     XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
 291
 292     XSync(dpy, False);
 293
 294     LockDisplay(dpy);
 295     GetReq(DRI2DestroyDrawable, req);
 296     req->reqType = info->codes->major_opcode;
 297     req->dri2ReqType = X_DRI2DestroyDrawable;
 298     req->drawable = drawable;
 299     UnlockDisplay(dpy);
 300     SyncHandle();
 301 }