Screen display metric count types

Types of metric counts for displays

Synopsis:

#include <screen/screen.h>
enum {
    SCREEN_DISPLAY_METRIC_ATTACH_COUNT = 0,
    SCREEN_DISPLAY_METRIC_POWER_ON_COUNT = 1,
    SCREEN_DISPLAY_METRIC_IDLE_COUNT = 2,
    SCREEN_DISPLAY_METRIC_EVENT_COUNT = 3,
    SCREEN_DISPLAY_METRIC_UPDATE_COUNT = 4,
    SCREEN_DISPLAY_METRIC_UPDATE_PIXELS = 5,
    SCREEN_DISPLAY_METRIC_UPDATE_READS = 6,
    SCREEN_DISPLAY_METRIC_UPDATE_WRITES = 7
};

Data:

SCREEN_DISPLAY_METRIC_ATTACH_COUNT
The number of times the display has been attached (connected) since the last time Screen display metrics were queried.
SCREEN_DISPLAY_METRIC_POWER_ON_COUNT
The number of times the display has been powered on since the last time Screen display metrics were queried.
SCREEN_DISPLAY_METRIC_IDLE_COUNT
The number of times the display has been in idle state since the last time Screen display metrics were queried.
SCREEN_DISPLAY_METRIC_EVENT_COUNT
The number of input events that has been focused (or sent) to the display since the last time Screen display metrics were queried.
SCREEN_DISPLAY_METRIC_UPDATE_COUNT
The number of times that the framebuffer of the display has been updated since the last time Screen display metrics were queried.
SCREEN_DISPLAY_METRIC_UPDATE_PIXELS
The number of pixels that the framebuffer of the display has updated since the last time Screen display metrics were queried.
SCREEN_DISPLAY_METRIC_UPDATE_READS
The number of bytes that have been read from the framebuffer of the display since the last time Screen display metrics have been queried.

The number of bytes read is an estimation calculated based on the number of pixels updated by the framebuffer.

SCREEN_DISPLAY_METRIC_UPDATE_WRITES
The number of bytes that have been written to the framebuffer of the display since the last time Screen display metrics have been queried.

The number of bytes written is an estimation calculated based on the number of pixels updated by the framebuffer.

Library:

libscreen

Description:

The metrics are on a per display basis and the counts are reset after being queried. That is, the counts are reset to 0 after you call screen_get_display_property_llv() to retrieve SCREEN_PROPERTY_METRICS.