HP c3700 hp workstations - hp-ux 11.x graphics administration guide - Page 57

extensions, double buffer extension DBE, determining swap performance

Get HP c3700 - Workstation PDF manuals and user guides View all HP c3700 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 57 highlights

configuring X Windows on HP-UX (other graphics cards) extensions extensions double buffer extension (DBE) DBE is an extension to the X Server that provides a double-buffering API. For more information about DBE and the API, consult the DBE man pages: DBE XdbeQueryExtension XdbeGetVisualInfo XdbeFreeVisualInfo XdbeScreenVisualInfo XdbeAllocateBackBufferName XdbeDeallocateBackBufferName XdbeSwapBuffers XdbeBeginIdiom XdbeEndIdiom XdbeGetBackBufferAttributes determining swap performance The DBE API does not allow users to determine if double-buffering in a visual is through software or hardware. However, the API does provide a way to determine relative swapping performance on a per-visual basis. The XdbeScreenVisualInfo() function returns information about the swapping performance levels for the double-buffering visuals on a display. A visual with a higher performance level is likely to have better double-buffer graphics performance than a visual with a lower performance level. Nothing can be deduced from any of the following: the magnitude of the difference of two performance levels, a performance level in isolation, or comparing performance levels from different servers. Chapter 3 55

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
configuring X Windows on HP-UX (other graphics cards)
extensions
Chapter 3
55
extensions
double buffer extension (DBE)
DBE is an extension to the X Server that provides a double-buffering
API. For more information about DBE and the API, consult the DBE
man pages:
DBE
XdbeQueryExtension
XdbeGetVisualInfo
XdbeFreeVisualInfo
XdbeScreenVisualInfo
XdbeAllocateBackBufferName
XdbeDeallocateBackBufferName
XdbeSwapBuffers
XdbeBeginIdiom
XdbeEndIdiom
XdbeGetBackBufferAttributes
determining swap performance
The DBE API does not allow users to determine if double-buffering in a
visual is through software or hardware. However, the API does provide a
way to determine relative swapping performance on a per-visual basis.
The
XdbeScreenVisualInfo()
function returns information about
the swapping performance levels for the double-buffering visuals on a
display. A visual with a higher performance level is likely to have better
double-buffer graphics performance than a visual with a lower
performance level. Nothing can be deduced from any of the following: the
magnitude of the difference of two performance levels, a performance
level in isolation, or comparing performance levels from different servers.