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Add simple test showing issues in grdimage #4204

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Merged
joa-quim merged 1 commit into from
Sep 12, 2020
Merged

Add simple test showing issues in grdimage #4204

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Binary file added test/grdimage/png_image.ps
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19 changes: 19 additions & 0 deletions test/grdimage/png_image.sh
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Original file line number Diff line number Diff line change
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#!/usr/bin/env bash
#
# Testing gmt grdimage with a PNG

gmt begin png_image ps
gmt grdmath -R0/5/0/5 -I1 -r X DUP UPPER DIV 255 MUL = r.grd
gmt grdmath Y DUP UPPER DIV 255 MUL = g.grd
gmt grdmath 5 X SUB 5 Y SUB MUL DUP UPPER DIV 255 MUL = b.grd
gmt grdmix r.grd g.grd b.grd -N -C -Grgb.png
# Lay down Cartesian image
gmt grdimage rgb.png -JX8c/0 -B0
# Lay down Cartesian image
gmt grdimage rgb.png -JX-8c/-8c -B0 -X9c
# Pretend it is geographic
gmt grdimage rgb.png -JM8c -R0/30/35/65 -B0 -X-9c -Y10c
gmt grdimage rgb.png -Ei -B0 -X9c
rm -f ?.grd
gmt end show