Screen debug graph types

Types of debug graphs.

Synopsis:

#include <screen/screen.h>
 
enum {
      SCREEN_DEBUG_GRAPH_FPS = (1 << 0)   
      SCREEN_DEBUG_GRAPH_POSTS = (1 << 1)   
      SCREEN_DEBUG_GRAPH_BLITS = (1 << 2)   
      SCREEN_DEBUG_GRAPH_UPDATES = (1 << 3)   
      SCREEN_DEBUG_GRAPH_CPU_TIME = (1 << 4)   
      SCREEN_DEBUG_GRAPH_GPU_TIME = (1 << 5)   
      SCREEN_DEBUG_STATISTICS = (1 << 7)   
};

Since:

BlackBerry 10.0.0

Data:

SCREEN_DEBUG_GRAPH_FPS
Frames per second; the number of posts over time.
SCREEN_DEBUG_GRAPH_POSTS
Pixel count of pixels in dirty rectangles over time.
SCREEN_DEBUG_GRAPH_BLITS
Pixel count of pixels that were in blit requests over time.
SCREEN_DEBUG_GRAPH_UPDATES
Pixel count of pixels used by composition manager in the window to update the framebuffer over time.
SCREEN_DEBUG_GRAPH_CPU_TIME
The time spent on the CPU drawing each frame.
SCREEN_DEBUG_GRAPH_GPU_TIME
The time spent on the GPU drawing each frame.
SCREEN_DEBUG_STATISTICS
Certain staticstics of a window.
The statistics are updated once per second and therefore represent a one second average. The statistics that are displayed are:
  • cpu usage, cpu time, gpu time
  • private mappings, free memory
  • window fps, display fps
  • events
  • objects
  • draws
  • triangles
  • vertices

Library:

libscreen (For the qcc command, use the -l screen option to link against this library)

Description:

All masks except SCREEN_DEBUG_STATISTICS are intended to be combined in a single integer bitmask. The bitmask represents combinations of desired debug graphs to be displayed. Only one window can enable debug graphs at a time; the last window to have enabled debug will have its values displayed in the graph. All data but the FPS is normalized to buffer size and refresh rate of display.

This enumeration is used when setting the SCREEN_PROPERTY_DEBUG property.

Last modified: 2014-05-14



Got questions about leaving a comment? Get answers from our Disqus FAQ.

comments powered by Disqus