status_t
CloneAccelerant(void* data)
{
// Initialize a copy of the accelerant as a clone. Argument data points to
// a copy of the data which was returned by GetAccelerantCloneInfo().
TRACE("Enter CloneAccelerant()\n");
char path[MAXPATHLEN] = "/dev/";
strcat(path, (const char*)data);
gInfo.deviceFileDesc = open(path, B_READ_WRITE); // open the device
if (gInfo.deviceFileDesc < 0)
return errno;
gInfo.bAccelerantIsClone = true;
status_t result = InitCommon(gInfo.deviceFileDesc);
if (result != B_OK) {
close(gInfo.deviceFileDesc);
return result;
}
result = gInfo.modeListArea = clone_area("ATI cloned display_modes",
(void**) &gInfo.modeList, B_ANY_ADDRESS, B_READ_AREA,
gInfo.sharedInfo->modeArea);
if (result < 0) {
UninitCommon();
close(gInfo.deviceFileDesc);
return result;
}
TRACE("Leave CloneAccelerant()\n");
return B_OK;
}
void
UninitAccelerant(void)
{
delete_area(gInfo.modeListArea);
gInfo.modeList = NULL;
UninitCommon();
if (gInfo.bAccelerantIsClone)
close(gInfo.deviceFileDesc);
}
status_t
InitAccelerant(int fileDesc)
{
// Initialize the accelerant. fileDesc is the file handle of the device
// (in /dev/graphics) that has been opened by the app_server.
TRACE("Enter InitAccelerant()\n");
gInfo.bAccelerantIsClone = false; // indicate this is primary accelerant
status_t result = InitCommon(fileDesc);
if (result == B_OK) {
SharedInfo& si = *gInfo.sharedInfo;
TRACE("Vendor ID: 0x%X, Device ID: 0x%X\n", si.vendorID, si.deviceID);
// Ensure that InitAccelerant is executed just once (copies should be clones)
if (si.bAccelerantInUse) {
result = B_NOT_ALLOWED;
} else {
result = TDFX_Init(); // perform init related to current chip
if (result == B_OK) {
result = si.engineLock.Init("3DFX engine lock");
if (result == B_OK)
result = si.overlayLock.Init("3DFX overlay lock");
if (result == B_OK) {
TDFX_ShowCursor(false);
// ensure that this function won't be executed again
// (copies should be clones)
si.bAccelerantInUse = true;
}
}
}
if (result != B_OK)
UninitCommon();
}
TRACE("Leave InitAccelerant(), result: 0x%X\n", result);
return result;
}
