Ubuntu Manpage: icetGet -- get an IceT state parameter

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NAME

       icetGet -- get an IceT state parameter

Synopsis

       #include <IceT.h>

       void icetGetDoublev(   IceTEnum       pname,
                              IceTDouble *   params  );

       void icetGetFloatv(   IceTEnum      pname,
                             IceTFloat *   params  );

       void icetGetIntegerv(   IceTEnum    pname,
                               IceTInt *   params  );

       void icetGetBooleanv(   IceTEnum        pname,
                               IceTBoolean *   params  );

       void icetGetEnumv(   IceTEnum     pname,
                            IceTEnum *   params  );

       void icetGetBitFieldv(   IceTEnum         pname,
                                IceTBitField *   params  );

       void icetGetPointerv(   IceTEnum      pname,
                               IceTVoid **   params  );

Description

       Like  OpenGL  ,the  operation  of  IceT is defined by a large state machine.  Also like OpenGL ,the state
       parameters can be retrieved through the icetGet functions.  Each  function  takes  a  symbolic  constant,
       pname, which identifies the state parameter to retrieve. They also each take an array, params, which will
       be filled with the values in pname.  It is the calling application's responsibility to ensure that params
       is big enough to hold all the data.

State Parameters

The following list identifies valid values for pname and a description of the associated state parameter.

ICET_BACKGROUND_COLOR
The color that IceT is currently assuming is the background color. It is an RGBA value that is
stored as four floating point values. This value is set either to the last value passed to
icetDrawFrame or icetCompositeImage, the OpenGL background color if icetGLDrawFrame was called, or
to black for color blending. (The correct background color is restored later.)

ICET_BACKGROUND_COLOR_WORD
The same as ICET_BACKGROUND_COLOR except that each component is stored as 8-bit RGBA values and
packed in a 4-byte integer. The idea is to rapidly fill the background of color buffers.

ICET_BLEND_TIME
The total time, in seconds, spent in performing color blending of images during the last call to
icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Stored as a double. An alias for this
value is ICET_COMPARE_TIME.

ICET_BUFFER_READ_TIME
The total time, in seconds, spent copying buffer data and reading from OpenGL buffers during the
last call to icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Stored as a double.

ICET_BUFFER_WRITE_TIME
The total time, in seconds, spent writing to OpenGL buffers during the last call to
icetGLDrawFrame. Always set to 0.0 after a call to icetDrawFrame or icetCompositeImage. Stored
as a double.

ICET_BYTES_SENT
The total number of bytes sent by the calling process for transferring image data during the last
call to icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Stored as an integer.

ICET_COLLECT_TIME
The total time spent in collecting image fragments to display processes during the last call to
icetDrawFrame, icetCompositeImage, or icetGLDrawFrame.

ICET_COLOR_FORMAT
The color format of images to be created by the rendering subsystem and composited by IceT .Use
icetSetColorFormat to set the color format. Use icetImageGetColorFormat to safely get the color
format for a particular image.

ICET_COMPARE_TIME
The total time, in seconds, spent in performing Z comparisons of images during the last call to
icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Stored as a double. An alias for this
value is ICET_BLEND_TIME.

ICET_COMPOSITE_MODE
The composite mode set by icetCompositeMode. A single entry stored as an IceTEnum.

ICET_COMPOSITE_ORDER
The order in which images are to be composited if ICET_ORDERED_COMPOSITE is enabled and the
current strategy supports ordered compositing. The parameter contains ICET_NUM_PROCESSES entries.
The value of this parameter is set with icetCompositeOrder. If the element of index i in the
array is set to j, then there are i images ``on top'' of the image generated by process j.

ICET_COMPOSITE_TIME
The total time, in seconds, spent in compositing during the last call to icetDrawFrame,
icetCompositeImage, or icetGLDrawFrame. Equal to $ICET_TOTAL_DRAW_TIME - ICET_RENDER_TIME -
ICET_BUFFER_READ_TIME - ICET_BUFFER_WRITE_TIME$. Stored as a double.

ICET_COMPRESS_TIME
The total time, in seconds, spent in compressing image data using active pixel encoding during
the last call to icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Stored as a double.

ICET_DATA_REPLICATION_GROUP
An array of process ids. There are ICET_DATA_REPLICATION_GROUP_SIZE entries in the array. IceT
assumes that all processes in the list will create the exact same image with their draw functions
(set with icetDrawCallback or icetGLDrawCallback). The local process id (ICET_RANK) will be part
of this list.

ICET_DATA_REPLICATION_GROUP_SIZE
The length of the ICET_DATA_REPLICATION_GROUP array.

ICET_DEPTH_FORMAT
The depth format of images to be created by the rendering subsystem and composited by IceT .Use
icetSetDepthFormat to set the depth format. Use icetImageGetDepthFormat to safely get the depth
format for a particular image.

ICET_DIAGNOSTIC_LEVEL
The diagnostics flags set with icetDiagnostics.

ICET_DISPLAY_NODES
An array of process ranks. The size of the array is equal to the number of tiles
(ICET_NUM_TILES). The $i^{th}$ entry is the rank of the process that is displaying the tile
described by the $i^{th}$ entry in ICET_TILE_VIEWPORTS.

ICET_DRAW_FUNCTION
A pointer to the drawing callback function, as set by icetDrawCallback.

ICET_FRAME_COUNT
The number of times icetDrawFrame, icetCompositeImage, or icetGLDrawFrame has been called for the
current context.

ICET_GEOMETRY_BOUNDS
An array of vertices whose convex hull bounds the drawn geometry. Set with icetBoundingVertices
or icetBoundingBox. Each vertex has three coordinates and are tightly packed in the array. The
size of the array is $3 * ICET_NUM_BOUNDING_VERTS$.

ICET_GLOBAL_VIEWPORT
Defines a viewport in an infinite logical display that covers all tile viewports (listed in
ICET_TILE_VIEWPORTS). The viewport, like an OpenGL viewport, is given as the integer four-tuple
$<x, y, width, height >$.x and y are placed at the leftmost and lowest position of all the tiles,
and width and height are just big enough for the viewport to cover all tiles.

ICET_INTERLACE_TIME
The total time, in seconds, spent in copying pixels to interlace images for better load balancing
during the last call to icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Stored as a
double.

ICET_MAGIC_K
The target k value used when compositing with the radix-k single image strategy.

ICET_MAX_IMAGE_SPLIT
The target number of maximum image splits to be performed by compositing strategies.

ICET_NUM_BOUNDING_VERTS
The number of bounding vertices listed in the ICET_GEOMETRY_BOUNDS parameter.

ICET_NUM_TILES
The number of tiles in the defined display. Basically equal to the number of times icetAddTile
was called after the last icetResetTiles.

ICET_NUM_PROCESSES
The number of processes in the parallel job as given by the IceTCommunicator object associated
with the current context.

ICET_PHYSICAL_RENDER_HEIGHT
The height of the images generated by the rendering system. This is set to the OpenGL viewport
height by icetGLDrawFrame or otherwise by explicitly setting it with icetPhysicalRenderSize or
otherwise implicitly to the largest tile height specified with icetAddTile.

ICET_PHYSICAL_RENDER_WIDTH
The width of the images generated by the rendering system. This is set to the OpenGL viewport
width by icetGLDrawFrame or otherwise by explicitly setting it with icetPhysicalRenderSize or
otherwise implicitly to the largest tile width specified with icetAddTile.

ICET_PROCESS_ORDERS
Basically, the inverse of ICET_COMPOSITE_ORDER. The parameter contains ICET_NUM_PROCESSES
entries. If the element of index i in the array is set to j, then there are j images ``on top'' of
the image generated by process i.

ICET_RANK
The rank of the process as given by the IceTCommunicator object associated with the current
context.

ICET_RENDER_TIME
The total time, in seconds, spent in the drawing callback during the last call to icetDrawFrame
or icetGLDrawFrame. Always set to 0.0 after a call to icetCompositeImage. Stored as a double.

ICET_SINGLE_IMAGE_STRATEGY
The single image sub-strategy set with icetSingleImageStrategy. Use
icetGetSingleImageStrategyName to get a user-readable name for the single image strategy.

ICET_STRATEGY
The strategy set with icetStrategy. Use icetGetStrategyName to get a user-readable name for the
strategy.

ICET_STRATEGY_SUPPORTS_ORDERING
Is true if and only if the current strategy supports ordered compositing.

ICET_TILE_DISPLAYED
The index of the tile the local process is displaying. The index will correspond to the tile
entry in the ICET_DISPLAY_NODES and ICET_TILE_VIEWPORTS arrays. If set to $0 <= i <
ICET_NUM_PROCESSES$, then the $i^{th}$ entry of ICET_DISPLAY_NODES is equal to ICET_RANK. If the
local process is not displaying any tile, then ICET_TILE_DISPLAYED is set to -1.

ICET_TILE_MAX_HEIGHT
The maximum height of any tile.

ICET_TILE_MAX_WIDTH
The maximum width of any tile.

ICET_TILE_VIEWPORTS
A list of viewports in the logical global display defining the tiles. Each viewport is the
four-tuple $<x, y, width, height >$defining the position and dimensions of a tile in pixels, much
like a viewport is defined in OpenGL .The size of the array is $4 * ICET_NUM_TILES$. The
viewports are listed in the same order as the tiles were defined with icetAddTile.

ICET_TOTAL_DRAW_TIME
Time spent in the last call to icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. This
includes all the time to render, read back, compress, and composite images. Stored as a double.

ICET_VALID_PIXELS_NUM
In conjunction with ICET_VALID_PIXELS_OFFSET, gives the range of valid pixels for the last image
returned from icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Given the arrays of pixels
returned with the icetImageGetColor and icetImageGetDepth functions, the valid pixels start at the
pixel indexed by ICET_VALID_PIXELS_OFFSET and continue for ICET_VALID_PIXELS_NUM. The tile to
which these pixels belong are captured in the ICET_VALID_PIXELS_TILE state variable. If the last
call to icetDrawFrame, icetCompositeImage, or icetGLDrawFrame did not return pixels for the local
process, ICET_VALID_PIXELS_NUM is set to 0. This state variable is only useful when
ICET_COLLECT_IMAGES is off. If on, it can be assumed that all display processes contain all pixels
in the image (ICET_VALID_PIXELS_NUM is the number of pixels in the image), and all other processes
have no pixel data.

ICET_VALID_PIXELS_OFFSET
In conjunction with ICET_VALID_PIXELS_NUM, gives the range of valid pixels for the last image
returned from icetDrawFrame, icetCompositeImage, or icetGLDrawFrame. Given the arrays of pixels
returned with the icetImageGetColor and icetImageGetDepth functions, the valid pixels start at the
pixel indexed by ICET_VALID_PIXELS_OFFSET and continue for ICET_VALID_PIXELS_NUM. The tile to
which these pixels belong are captured in the ICET_VALID_PIXELS_TILE state variable. This state
variable is only useful when ICET_COLLECT_IMAGES is off. If on, it can be assumed that all display
processes contain all pixels in the image (ICET_VALID_PIXELS_OFFSET is 0), and all other processes
have no pixel data.

ICET_VALID_PIXELS_TILE
Gives the tile for which the last image returned from icetDrawFrame, icetCompositeImage, or
icetGLDrawFrame contains pixels. Each process has its own value. If the last call to
icetDrawFrame, icetCompositeImage, or icetGLDrawFrame did not return pixels for the local process,
then this state variable is set to -1. This state variable is only useful when ICET_COLLECT_IMAGES
is off. If on, it can be assumed that all display processes have valid pixels for their respective
display tiles, and all other processes have no pixel data.

In addition, if you are using the OpenGL layer (i.e., have called icetGLInitialize), these variables,
defined in IceTGL.h, are also available.

ICET_GL_DRAW_FUNCTION
A pointer to the OpenGL drawing callback function, as set by icetGLDrawCallback.

ICET_GL_READ_BUFFER
The OpenGL buffer to read from (and write to). Set with icetGLSetReadBuffer.

Errors

       ICET_BAD_CAST
               The state parameter requested is of a type that cannot be cast to the output type.

       ICET_INVALID_ENUM
               pname is not a valid state parameter.

Warnings

       None.

Bugs

       None known.

Notes

       Not every state variable is documented here. There is a set of parameters used internally by IceT or  are
       more appropriately retrieved with other functions such as icetIsEnabled.

Copyright

       Copyright (C)2003 Sandia Corporation

       Under  the  terms  of  Contract  DE-AC04-94AL85000  with  Sandia Corporation, the U.S. Government retains
       certain rights in this software.

       This source code is released under the New BSD License.