int drmHandleEvent(int fd, drmEventContextPtr evctx)
{
char buffer[1024];
int len, i;
struct drm_event *e;
struct drm_event_vblank *vblank;
/* The DRM read semantics guarantees that we always get only
* complete events. */
len = read(fd, buffer, sizeof buffer);
if (len == 0)
return 0;
if (len < sizeof *e)
return -1;
i = 0;
while (i < len) {
e = (struct drm_event *) &buffer[i];
switch (e->type) {
case DRM_EVENT_VBLANK:
if (evctx->version < 1 ||
evctx->vblank_handler == NULL)
break;
vblank = (struct drm_event_vblank *) e;
evctx->vblank_handler(fd,
vblank->sequence,
vblank->tv_sec,
vblank->tv_usec,
U642VOID (vblank->user_data));
break;
case DRM_EVENT_FLIP_COMPLETE:
if (evctx->version < 2 ||
evctx->page_flip_handler == NULL)
break;
vblank = (struct drm_event_vblank *) e;
evctx->page_flip_handler(fd,
vblank->sequence,
vblank->tv_sec,
vblank->tv_usec,
U642VOID (vblank->user_data));
break;
default:
break;
}
i += e->length;
}
return 0;
}
drm_public int drmHandleEvent(int fd, drmEventContextPtr evctx)
{
char buffer[1024];
int len, i;
struct drm_event *e;
struct drm_event_vblank *vblank;
struct drm_event_crtc_sequence *seq;
void *user_data;
/* The DRM read semantics guarantees that we always get only
* complete events. */
len = read(fd, buffer, sizeof buffer);
if (len == 0)
return 0;
if (len < (int)sizeof *e)
return -1;
i = 0;
while (i < len) {
e = (struct drm_event *)(buffer + i);
switch (e->type) {
case DRM_EVENT_VBLANK:
if (evctx->version < 1 ||
evctx->vblank_handler == NULL)
break;
vblank = (struct drm_event_vblank *) e;
evctx->vblank_handler(fd,
vblank->sequence,
vblank->tv_sec,
vblank->tv_usec,
U642VOID (vblank->user_data));
break;
case DRM_EVENT_FLIP_COMPLETE:
vblank = (struct drm_event_vblank *) e;
user_data = U642VOID (vblank->user_data);
if (evctx->version >= 3 && evctx->page_flip_handler2)
evctx->page_flip_handler2(fd,
vblank->sequence,
vblank->tv_sec,
vblank->tv_usec,
vblank->crtc_id,
user_data);
else if (evctx->version >= 2 && evctx->page_flip_handler)
evctx->page_flip_handler(fd,
vblank->sequence,
vblank->tv_sec,
vblank->tv_usec,
user_data);
break;
case DRM_EVENT_CRTC_SEQUENCE:
seq = (struct drm_event_crtc_sequence *) e;
if (evctx->version >= 4 && evctx->sequence_handler)
evctx->sequence_handler(fd,
seq->sequence,
seq->time_ns,
seq->user_data);
break;
default:
break;
}
i += e->length;
}
return 0;
}