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#include <stdio.h>
#define NEED_REPLIES
#include <X11/Xlibint.h>
#include <X11/extensions/Xext.h>
#include <X11/extensions/extutil.h>
#include <X11/extensions/dri2proto.h>
#include <xf86drm.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "drm-xvimage.h"
#define FALSE 0
#define TRUE 1
#define DRI2DriverDRI 0
static char dri2ExtensionName[] = DRI2_NAME;
static XExtensionInfo dri2_info_data, *dri2_info = &dri2_info_data;
static XEXT_GENERATE_CLOSE_DISPLAY(DRI2CloseDisplay, dri2_info);
static int DRI2Error(Display *dpy, xError *err, XExtCodes *codes, int *ret_code)
{
return xFalse;
}
static XExtensionHooks dri2ExtensionHooks = {
.close_display = DRI2CloseDisplay,
.error = DRI2Error,
};
static XEXT_GENERATE_FIND_DISPLAY(DRI2FindDisplay, dri2_info,
dri2ExtensionName, &dri2ExtensionHooks, 0, NULL);
static int DRI2QueryExtension(Display *dpy, int *eventBase, int *errorBase)
{
XExtDisplayInfo *info = DRI2FindDisplay(dpy);
if (XextHasExtension(info)) {
*eventBase = info->codes->first_event;
*errorBase = info->codes->first_error;
return TRUE;
}
return FALSE;
}
static int DRI2QueryVersion(Display *dpy, int *major, int *minor)
{
XExtDisplayInfo *info = DRI2FindDisplay(dpy);
xDRI2QueryVersionReply rep;
xDRI2QueryVersionReq *req;
XextCheckExtension(dpy, info, dri2ExtensionName, FALSE);
LockDisplay(dpy);
GetReq(DRI2QueryVersion, req);
req->reqType = info->codes->major_opcode;
req->dri2ReqType = X_DRI2QueryVersion;
req->majorVersion = DRI2_MAJOR;
req->minorVersion = DRI2_MINOR;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
return FALSE;
}
*major = rep.majorVersion;
*minor = rep.minorVersion;
UnlockDisplay(dpy);
SyncHandle();
return TRUE;
}
static int DRI2Connect(Display *dpy, XID window, char **driverName,
char **deviceName)
{
XExtDisplayInfo *info = DRI2FindDisplay(dpy);
xDRI2ConnectReply rep;
xDRI2ConnectReq *req;
XextCheckExtension (dpy, info, dri2ExtensionName, False);
LockDisplay(dpy);
GetReq(DRI2Connect, req);
req->reqType = info->codes->major_opcode;
req->dri2ReqType = X_DRI2Connect;
req->window = window;
req->driverType = DRI2DriverDRI;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
return FALSE;
}
if (rep.driverNameLength == 0 && rep.deviceNameLength == 0) {
UnlockDisplay(dpy);
SyncHandle();
return FALSE;
}
*driverName = Xmalloc(rep.driverNameLength + 1);
if (*driverName == NULL) {
_XEatData(dpy, ((rep.driverNameLength + 3) & ~3) + ((rep.deviceNameLength + 3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
return FALSE;
}
_XReadPad(dpy, *driverName, rep.driverNameLength);
(*driverName)[rep.driverNameLength] = '\0';
*deviceName = Xmalloc(rep.deviceNameLength + 1);
if (*deviceName == NULL) {
Xfree(*driverName);
_XEatData(dpy, ((rep.deviceNameLength + 3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
return FALSE;
}
_XReadPad(dpy, *deviceName, rep.deviceNameLength);
(*deviceName)[rep.deviceNameLength] = '\0';
UnlockDisplay(dpy);
SyncHandle();
return TRUE;
}
static int DRI2Authenticate(Display *dpy, XID window, drm_magic_t magic)
{
XExtDisplayInfo *info = DRI2FindDisplay(dpy);
xDRI2AuthenticateReq *req;
xDRI2AuthenticateReply rep;
XextCheckExtension(dpy, info, dri2ExtensionName, FALSE);
LockDisplay(dpy);
GetReq(DRI2Authenticate, req);
req->reqType = info->codes->major_opcode;
req->dri2ReqType = X_DRI2Authenticate;
req->window = window;
req->magic = magic;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
return FALSE;
}
UnlockDisplay(dpy);
SyncHandle();
return rep.authenticated;
}
int drm_handle_flink(struct drm *drm, uint32_t handle, uint32_t *name)
{
struct drm_gem_flink flink;
int ret;
memset(&flink, 0, sizeof(flink));
flink.handle = handle;
ret = drmIoctl(drm->fd, DRM_IOCTL_GEM_FLINK, &flink);
if (ret == 0)
*name = flink.name;
return ret;
}
void drm_handle_close(struct drm *drm, uint32_t handle)
{
struct drm_gem_close arg;
memset(&arg, 0, sizeof(arg));
arg.handle = handle;
drmIoctl(drm->fd, DRM_IOCTL_GEM_CLOSE, &arg);
}
struct drm *drm_get_and_auth(Display *dpy)
{
int error_base, event_base, major, minor, fd = -1;
char *device_name = NULL;
char *driver_name = NULL;
struct drm *drm;
drm_magic_t magic;
XID window = DefaultRootWindow(dpy);
if (!DRI2QueryExtension(dpy, &event_base, &error_base))
goto err;
if (!DRI2QueryVersion(dpy, &major, &minor))
goto err;
if (!DRI2Connect(dpy, window, &driver_name, &device_name))
goto err;
fd = open(device_name, O_RDWR);
if (fd < 0)
goto err;
if (drmGetMagic(fd, &magic))
goto err;
if (!DRI2Authenticate(dpy, window, magic))
goto err;
if (device_name)
XFree(device_name);
if (driver_name)
XFree(driver_name);
drm = malloc(sizeof(*drm));
if (!drm)
goto err;
drm->fd = fd;
return drm;
err:
if (fd >= 0)
close(fd);
if (device_name)
XFree(device_name);
if (driver_name)
XFree(driver_name);
return NULL;
}
void drm_close(struct drm *drm)
{
close(drm->fd);
free(drm);
}
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