FrameTimings

A #GdkFrameTimings object holds timing information for a single frame of the application’s displays. To retrieve #GdkFrameTimings objects, use gdk_frame_clock_get_timings() or gdk_frame_clock_get_current_timings(). The information in #GdkFrameTimings is useful for precise synchronization of video with the event or audio streams, and for measuring quality metrics for the application’s display, such as latency and jitter.

class FrameTimings {

protected

GdkFrameTimings* gdkFrameTimings;

protected

bool ownedRef;

GdkFrameTimings* getFrameTimingsStruct();

void* getStruct();

this(GdkFrameTimings* gdkFrameTimings, bool ownedRef);

static GType getType();

bool getComplete();

long getFrameCounter();

long getFrameTime();

long getPredictedPresentationTime();

long getPresentationTime();

long getRefreshInterval();

FrameTimings doref();

void unref();

}

Constructors

this this(GdkFrameTimings* gdkFrameTimings, bool ownedRef): Sets our main struct and passes it to the parent class.

Members

Functions

doref FrameTimings doref(): Increases the reference count of @timings.
getComplete bool getComplete(): The timing information in a #GdkFrameTimings is filled in incrementally as the frame as drawn and passed off to the window system for processing and display to the user. The accessor functions for #GdkFrameTimings can return 0 to indicate an unavailable value for two reasons: either because the information is not yet available, or because it isn't available at all. Once gdk_frame_timings_get_complete() returns %TRUE for a frame, you can be certain that no further values will become available and be stored in the #GdkFrameTimings.
getFrameCounter long getFrameCounter(): Gets the frame counter value of the #GdkFrameClock when this this frame was drawn.
getFrameTime long getFrameTime(): Returns the frame time for the frame. This is the time value that is typically used to time animations for the frame. See gdk_frame_clock_get_frame_time().
getFrameTimingsStruct GdkFrameTimings* getFrameTimingsStruct(): Get the main Gtk struct
getPredictedPresentationTime long getPredictedPresentationTime(): Gets the predicted time at which this frame will be displayed. Although no predicted time may be available, if one is available, it will be available while the frame is being generated, in contrast to gdk_frame_timings_get_presentation_time(), which is only available after the frame has been presented. In general, if you are simply animating, you should use gdk_frame_clock_get_frame_time() rather than this function, but this function is useful for applications that want exact control over latency. For example, a movie player may want this information for Audio/Video synchronization.
getPresentationTime long getPresentationTime(): Reurns the presentation time. This is the time at which the frame became visible to the user.
getRefreshInterval long getRefreshInterval(): Gets the natural interval between presentation times for the display that this frame was displayed on. Frame presentation usually happens during the “vertical blanking interval”.
getStruct void* getStruct(): the main Gtk struct as a void*
unref void unref(): Decreases the reference count of @timings. If @timings is no longer referenced, it will be freed.

Static functions

getType GType getType()

Variables

gdkFrameTimings GdkFrameTimings* gdkFrameTimings;: the main Gtk struct
ownedRef bool ownedRef;: Undocumented in source.