A mostly BP compatible Graph
unit exists as part of the
GRX
package. It is known to work under DJGPP, Cygwin, mingw,
Linux/IA32 with svgalib, and should work under any Unix system with
X11 (tested under Linux, Solaris, AIX, etc.).
There is a small difference in the color numbering, but it should be
easy to work-around: You can't assume, e.g., that color 1 is always
blue, and 2 is green, etc. On a system with 15 or more bits of color
depth (i.e., 32768 or more colors, which most PCs today have), they
will all be very dark shades of blue. This is not really a bug, but
simply a property of modern high colors modes (whereas BP's
Graph
unit was only designed for 16 and 256 color modes).
However, the names Blue
, Green
etc. stand for the
correct colors in the Graph
unit of GRX. They are no
constants, but functions (because the color depth is in general not
known until runtime), so you can't use them in contexts where
constants are expected. Also, they might conflict with the
identifiers of the CRT
unit if you use both units at the same
time. If you want to use computed color values in the range 0
... 15, you can translate them to the correct colors using the
EGAColor
function.