FBFADE(1)

NAME

fbfade - fade a frame buffer image in or out

SYNOPSIS

fbfade [-H] [-f input_image_name] [-s input_square_size] [-w input_width]
[-n input_height] [-S output_square_size] [-W output_width] [-N output_height]
[[-F] output_frame_buffer_name]

DESCRIPTION

fbfade gradually displays an image on a frame buffer, one randomly chosen pixel at a time.

Options

-H: (high resolution) Assumes 1024 by 1024 pixels for default input image size instead of 512 by 512. Explicitly-specified sizes override the default, and if actual input image size is smaller than requested, the actual size will be used. If output frame buffer size is not specified, the revised input size will be requested for output. If actual output frame buffer size is greater than requested, only the lower-left portion of the frame buffer will be used. Actual sizes depend on details of specific frame buffers.
-f input_image_name: Inputs the image to be displayed from the specified frame buffer or pix(5) file, instead of using pure background (which fades out the image already on the output frame buffer).
-s input_square_size: Specifies input image width and height.
-w input_width: Specifies input image width.
-n input_height: Specifies input image height.
-S output_square_size: Specifies output frame buffer width and height.
-W output_width: Specifies output frame buffer width.
-N output_height: Specifies output frame buffer height.
-F output_frame_buffer_name: Outputs to the specified frame buffer instead of the one specified by the FB_FILE environment variable (or the default, if FB_FILE is not set). If this is the last option specified, the -F is optional.

CAVEAT

fbfade works best in conjunction with a frame buffer having very fast access to pixels.

EXAMPLE

The following shell script can be used to produce a slick slide show:

fbclear
for i in *.pix
do
    fbfade -f $i
    sleep 15
done
fbfade

DIAGNOSTICS

Error messages are intended to be self-explanatory.

AUTHORS

Douglas A. Gwyn, BRL/VLD-VMB; Gary S. Moss, BRL/VLD-VMB

COPYRIGHT

BUG REPORTS

Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org