# set terminal pngcairo  background "#ffffff" enhanced font "arial,8" fontscale 1.0 size 540, 360 
# set output 'argb_hexdata.2.png'
set grid nopolar
set grid xtics nomxtics ytics nomytics ztics nomztics nortics nomrtics \
 nox2tics nomx2tics noy2tics nomy2tics nocbtics nomcbtics
set grid vertical layerdefault   linecolor rgb "gray"  linewidth 0.200 dashtype solid,  linecolor rgb "gray"  linewidth 0.200 dashtype solid
unset key
set view 33, 46, 1, 1
set style data lines
set xtics  norangelimit 1 
set ytics  norangelimit 1 
set ztics  norangelimit 1 
set cbtics  norangelimit 1 
set rtics  norangelimit 1 
set title "Alpha+RGB image data loaded from a hexadecimal matrix" 
set trange [ * : * ] noreverse nowriteback
set urange [ * : * ] noreverse nowriteback
set vrange [ * : * ] noreverse nowriteback
set xrange [ -0.500000 : 3.50000 ] noreverse nowriteback
set x2range [ * : * ] noreverse writeback
set yrange [ -1.00000 : 3.50000 ] noreverse nowriteback
set y2range [ * : * ] noreverse writeback
set zrange [ * : * ] noreverse writeback
set cbrange [ * : * ] noreverse writeback
set rrange [ * : * ] noreverse writeback
set colorbox vertical origin screen 0.9, 0.2 size screen 0.05, 0.6 front  noinvert bdefault
NO_ANIMATION = 1
set pixmap 123 'gradient.png' # (256 x 256 pixmap)
set pixmap 123 at screen 0, 0, 0  size screen 1, 1 behind 
## Last datafile plotted: "$BITS"
splot $BITS matrix using 1:2:(1.0):3 with rgbalpha pixels