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IRIX Base Documentation 1998 November
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IRIX 6.5.2 Base Documentation November 1998.img
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makemap.z
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makemap
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1998-10-20
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67 lines
MMMMAAAAKKKKEEEEMMMMAAAAPPPP((((1111GGGG)))) MMMMAAAAKKKKEEEEMMMMAAAAPPPP((((1111GGGG))))
NNNNAAAAMMMMEEEE
makemap - store colors into the gl color map
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
mmmmaaaakkkkeeeemmmmaaaapppp [ ----ffffuuuullllllll ]
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
A _c_o_l_o_r_m_a_p is a mapping from color-index values (integers) into RGB
values. All _G_L programs (graphics programs linked with libgl) share a
common X colormap, which is distinct from the default X root colormap.
Essentially, _m_a_k_e_m_a_p causes a certain set of colors to be assigned to the
GL colormap (which is just another X colormap as far as the X server is
concerned).
Although there may be multiple X colormaps defined in the system at any
one time, only one of these X colormaps is _i_n_s_t_a_l_l_e_d (loaded into the
single hardware colormap) at any given time. The _G_L colormap will be
_i_n_s_t_a_l_l_e_d whenever _G_L programs have input focus.
The _G_L colormap is relevant only for _G_L programs running in _c_m_o_d_e
(color-index mode).
By default, _m_a_k_e_m_a_p will initialize the first 256 entries in the _G_L
colormap with the exception of color cells 16 thru 31. The reason for
not initializing 16-31 is so that X clients can use those cells without
interfering with _G_L programs. The lowest eight colors of the _G_L colormap
are mapped to the eight standard colors of the Graphics Library (black,
red, green, yellow, blue, magenta, cyan and white). The next 8 colors
(8-15) are mapped to some pastel shades as used by the IRIS Workspace and
other system tools. These colors can be dithered with the first eight to
get a very wide range even on a minimal system when in double buffered
mode. The next 16 colors (16-31) are left untouched. The next 24 colors
(32 to 55) are mapped as a black to almost-white gray ramp. The
remaining 200 colors (56 to 255) are mapped as a 5*8*5 color cube, which
starts at black and ends with white. In this color cube, the 8 levels of
green change the fastest, then 5 levels of red, and finally the 5 levels
of blue change slowest.
Options:
----ffffuuuullllllll If there are more than eight planes, map color cells 256-511 to the
ordered color map used by some of the image tools in the 4DGifts
package and colors 512-767 to a 256 level black to white gray ramp.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
loadmap(1G), savemap(1G), showmap(1G),
PPPPaaaaggggeeee 1111