readco(3G)readco(3G)NAMEreadco - sets the component source within the framebuffer source for
pixels that various routines read, useful primarily for monochrome image
processing.
FORTRAN 77 SPECIFICATION
subroutine readco(mode)
integer*4 mode
PARAMETERS
src expects a symbolic constant that identifies the pixel component
that is to be used:
RCNML Indicates that all 4 frame buffer components, ABGR should be
transferred. This is the default.
RCALPH selects the alpha channel of the current framebuffer
selected by readsource.
RCBLUE selects the blue channel of the current framebuffer
selected by readsource.
RCGREE selects the green channel of the current framebuffer
selected by readsource.
RCRED selects the red channel of the current framebuffer selected
by readsource.
DESCRIPTIONreadco specifies the component source buffer from the pixel source buffer
that rectco, readpi, readRG, rectre, and lrectr use.
SEE ALSO
lrectr, readpi, readRG, rectco
NOTES
This subroutine is available only in immediate mode and only on
RealityEngine systems running 5.0.1 or later.
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