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glx/dri2: add dri2 prime support. 

This adds support for having libGL pick a different driver for prime support.

DRI_PRIME env var is set to the value retrieved from the server randr
provider calls, by the calling process. (generally DRI_PRIME=1 will be
the right answer).

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2010-03-12 16:09:23 +10:00
parent 565a4e2a86
commit 6a3ac03f2b
1 changed files with 13 additions and 0 deletions
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13
src/glx/dri2.c
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@ -269,6 +269,7 @@ DRI2Connect(Display * dpy, XID window, char **driverName, char **deviceName)
XExtDisplayInfo *info = DRI2FindDisplay(dpy);
xDRI2ConnectReply rep;
xDRI2ConnectReq *req;
char *prime;
XextCheckExtension(dpy, info, dri2ExtensionName, False);
@ -277,7 +278,19 @@ DRI2Connect(Display * dpy, XID window, char **driverName, char **deviceName)
req->reqType = info->codes->major_opcode;
req->dri2ReqType = X_DRI2Connect;
req->window = window;
req->driverType = DRI2DriverDRI;
#ifdef DRI2DriverPrimeShift
prime = getenv("DRI_PRIME");
if (prime) {
uint32_t primeid;
errno = 0;
primeid = strtoul(prime, NULL, 0);
if (errno == 0)
req->driverType |= ((primeid & DRI2DriverPrimeMask) << DRI2DriverPrimeShift);
}
#endif
if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();