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ivm_pixmap(ivm) ivm ivm_pixmap(ivm)

NAME

ivm_pixmap - manage mapping of raw image data into X pixmaps

DESCRIPTION

Ivm_pixmap objects manage the mapping of raw data read using the mio classes into X pixmaps, suitable for display. An ivm_pixmap object knows about mio, ivm_mapper, and xpixmap objects, and sets their parameters according to its parameters.

SUPERCLASS

object

INSTANCE VARIABLES

color_cells is the name of the color cells to map the image through. This object is either an xprivate_cells object or an xshared_cells object.

file_format is the image file format. This format should correspond to an mio class. For example, if this file format is 2d, the mio_2d class will be used to read the image.

depth is the depth of the generated xpixmap. The default is 8.

height is the height of the generated xpixmap.

ivm_mapper is the name of an ivm_mapper object to map the raw mio data into the xpixmap object.

mio is the name of the mio object from which the ivm_pixmap gets its data.

prefix is the mio datafile prefix.

slice_number is the current mio slice.

width is the width of the generated xpixmap.

MESSAGES

color_cells? cells? returns the name of the color cells object.

file_format? returns the value of the file_format instance variable.

height? returns the height of the xpixmap.

ivm_mapper? returns the name of the ivm_mapper object.

mio? returns the name of the mio object.

prefix? returns the value of the prefix instance variable.

slice_number? slice? returns the current slice number

width? returns the width of the xpixmap.

xpixmap? returns the name of the xpixmap object managed by this object.

free! frees the ivm_pixmap object and any storage it created. In particular, it sends a free! message to the xpixmap object, since it is responsible for its creation. It does not free the ivm_mapper object.

check_xpixmap? checks for the existence of an xpixmap. If it has not been created, it attempts to create one.

create_xpixmap! creates (or recreates) the xpixmap.

histogram? returns a histogram of the pixel values in the current mio image. The data is returned as an array of floats and a length.

color_cells= cells= sets the name of the color cell object through which the data is mapped.

file_format= sets the mio file format type.

height= sets the height of the mapped data.

ivm_mapper= sets the name of the ivm_mapper object.

mio= sets the name of the mio object.

prefix= sets the file prefix.

slice_number= slice= sets the current slice number.

width= sets the width of the generated xpixmap.

EXAMPLES

The following example demonstrates an ivm_pixmap object managing mio_2d, ivm_mapper, and xpixmap objects. Once the xpixmap is created, it is copied into an xwindow.

xprivate_cells new: pv_cells number_of_colors=8 @1 rgb:(0,0,0) @2 rgb:(0,0,1) @3 rgb:(0,1,0) @4 rgb:(0,1,1) @5 rgb:(1,0,0) @6 rgb:(1,0,1) @7 rgb:(1,1,0) @8 rgb:(1,1,1) ;

mio_2d new: mio_headsq; ivm_mapper new: mapper;

ivm_pixmap new: manager prefix="/home/moose/u2/montnaro/oscar/viva/slices/headsq" slice=10 cells="pv_cells" ivm_"mapper=mapper" mio="mio_headsq" width=100 height=100 file_format="2d" create_xpixmap! ;

xwindow new: win width=100 height=100 map! ;

win copy_area:([manager xpixmap?], 100, 100); xdisplay flush!;